JP3411986B2 - Apparatus for removing unnecessary parts of outer periphery of shadow mask from thin metal plate - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a device used to remove separately the outer peripheral unnecessary portion of the metal sheet or brush Yadoumasuku the half etching portion of the linear is formed along the peripheral edge shape of the shadow mask Regarding

[0002]

2. Description of the Related Art A shadow mask is formed by processing a thin metal plate made of a shadow mask material such as Invar material by applying a photo-etching method, and after etching is completed, unnecessary peripheral portions of the shadow mask are separated from the thin metal plate. It is completed by removing. That is, as shown in FIG. 12, in the metal thin plate after the etching is completed, a linear half-etched portion 2 along the peripheral shape of the shadow mask portion 1, that is, a groove which is not penetrated by etching only from one side of the metal thin plate. The metal thin plate is cut off at the half-etched portion 2 to remove the outer peripheral unnecessary portion 3 of the shadow mask portion 1 to obtain a shadow mask.

An example of an apparatus for separating and removing an unnecessary peripheral portion of a shadow mask from a thin metal plate is disclosed in, for example, Japanese Patent Laid-Open Publication No. Hei 4-
There is a structure disclosed in Japanese Patent No. 71138. As shown in FIG. 13, the apparatus disclosed in the same publication places a metal thin plate 4 on which a shadow mask portion is formed on a table 110, and pushes out a rod of an air cylinder 112 to push the shadow mask of the metal thin plate 4. The portion is clamped and fixed between the table 110 and the holding plate 114, and the rods of the pair of upper and lower air cylinders 116 are extended to bring the vibrating pieces 118 into contact with the outer peripheral unnecessary portions of the metal thin plate 4, respectively.
As shown in FIG. 14, the rods of the air cylinders 116 are vertically expanded and contracted in synchronization with each other to vibrate the outer peripheral unnecessary portion 3 of the thin metal plate 4 vertically.
Then, in this device, in the outer peripheral unnecessary portion 3 of the metal thin plate 4,
For example, the amplitude is about 30 mm and the frequency is about 40 in about 30 seconds.
By applying a vibration which is a turn, the half-etched portion 2 which is a boundary portion between the shadow mask portion 1 of the metal thin plate 4 and the outer peripheral unnecessary portion 3 is fatigue-fractured, and the shadow mask portion 1
The outer peripheral unnecessary portion 3 is cut and separated.

Further, there are cases where two shadow mask portions are formed side by side on a single metal thin plate. When such a thin metal plate is used to separate and remove an unnecessary outer peripheral portion of the shadow mask portion by using the above-mentioned device or the like. As shown in FIG. 15, two shadow mask portions 5 and 5 are connected by a connection unnecessary portion 6, and each shadow mask portion and connection unnecessary portion 6 are respectively formed by linear half etching portions 7 and 7 which are parallel to each other. It becomes a thin metal plate in a partitioned form. When the connection unnecessary portion 6 is cut off from such a metal thin plate to obtain two shadow masks, the apparatus shown in FIG. 13 cannot be used. In this case, conventionally, as shown in FIG. 16, the pressing plate 120 is manually placed on the half-etched portion 7 by hand.
Press the metal thin plate with the other half etching part 7
One of the shadow mask portions 5 is repeatedly bent, and the half-etched portion 7 is fatigue-fractured by this so that the one shadow mask portion 5 is separated. After that,
The connection-unnecessary portion 6 is separated from the other shadow mask portion 5 by the half etching portion 7 and removed by manual work or the like.

[0005]

[Patent Document 1] Japanese Patent Application Laid-Open No. 4-71138
In the apparatus shown in FIG. 13 disclosed in Japanese Patent Publication No.
As shown in FIG. 4, the outer peripheral unnecessary portion 3 of the metal thin plate 4 is vertically vibrated by about 30 mm, so that the shadow mask portion 1 of the metal thin plate 4 does not move the end portion 9 between the table 110 and the holding plate 114. The bending force may act on the position, and the edge portion of the shadow mask may be deformed such as broken.

In order to vibrate the outer peripheral unnecessary portion 3 of the metal thin plate 4 up and down by about 30 mm to effectively fatigue-break the half-etched portion 2, a certain width dimension of the outer peripheral unnecessary portion 3 is secured. However, since shadow mask materials are expensive, they are not economical. On the other hand, when the width of the outer peripheral unnecessary portion 3 is reduced, not only the fatigue damage of the half-etched portion 2 is not effectively performed, but also the bending force acting on the shadow mask portion 1 becomes larger as described above. Therefore, there is a high possibility that the edge portion of the shadow mask will be deformed. In recent years, the width dimension of the outer peripheral unnecessary portion 3 tends to become smaller and smaller from the viewpoint of cost, and the device shown in FIG. 13 cannot cope with this.

Further, the half-etched portion 2 of the metal thin plate 4 is fatigue-damaged and the unnecessary outer peripheral portion 3 becomes the shadow mask portion 1.
If the outer peripheral unnecessary portion 3 is vibrated up and down by the vibrating piece 118 even after being separated from the outer peripheral portion, the end portion of the shadow mask portion 1 may be damaged by the removed piece of the outer peripheral unnecessary portion 3. Conceivable.

Further, when the connection unnecessary portion is separated and removed from the metal thin plate on which the two shadow masks are formed,
As shown in FIG. 16, when a manual work is performed, a large turning radius for bending the thin metal plate requires a great amount of labor. When the method is mechanized to be automated, a large turning radius for bending the thin metal plate causes an increase in size of the apparatus, and the shadow mask portion 5 on one side of the thin metal plate is used. It is necessary to separate and remove the connection unnecessary portion 6 from the other shadow mask portion 5 after the separation of the two parts, which requires a lot of work time because the process has two steps, resulting in poor work efficiency.

The present invention has been made in view of the above circumstances, and separates an unnecessary outer peripheral portion of a shadow mask from a thin metal plate having a linear half-etched portion formed along the peripheral shape of the shadow mask. When removing it by removing it, there is no fear of deformation such as bending at the edge part of the obtained shadow mask, and even if the width dimension of the outer peripheral unnecessary part becomes small, the fatigue damage of the half-etched part is effectively performed. In addition, even if the unnecessary peripheral portion is swayed after the unnecessary peripheral portion is separated from the thin metal plate, the end portion of the shadow mask portion is not damaged by the removal piece of the unnecessary peripheral portion. The purpose is to provide a device.

Further, in the invention according to claim 3, the two shadow mask portions are connected by the connection unnecessary portion after the outer peripheral unnecessary portion is separated and removed from the metal thin plate on which the two shadow mask portions are formed side by side. When removing the connection-unnecessary part from the thin metal plate on which linear half-etched parts are formed in parallel between each shadow mask part and the connection-unnecessary part, the conventional manual operation is not required. Moreover, it is an object of the present invention to provide an apparatus which can perform the work automatically, can be miniaturized, and can fatigue-break two half-etched portions in one step, and has good work efficiency.

[0011]

The invention according to claim 1 is
In the apparatus for removing an unnecessary peripheral portion of a shadow mask from a metal thin plate, the peripheral unnecessary portion is removed from a metal thin plate on which a linear half-etched portion is formed so as to partition the shadow mask portion and an unnecessary peripheral portion thereof. A holding means for holding the shadow mask portion of the thin metal plate, a gripping means for gripping the outer peripheral unnecessary portion of the metal thin plate, and a gripping means for gripping the outer peripheral unnecessary portion are arc-shaped around the half-etched portion of the metal thin plate. Swinging means to swing the
An arcuate movement track of the gripping means that is swung by a step.
The half-etched part of the thin metal plate is placed at the center of the circle containing the trace.
So that the shadow mass is
The gripping means and the rocking
A moving mechanism that moves the moving means in the direction along the thin metal plate surface.
And are provided.

According to a second aspect of the present invention, in the apparatus according to the first aspect, a pair of upper and lower pressing members for fixing the holding means by sandwiching the shadow mask portion of the thin metal plate from both upper and lower sides, and a pair of the pressing members. The pressing member driving means for moving the pressing members of
A movable unit that is provided with a gripping unit and is reciprocally moved in an arc shape, a support unit that supports the movable unit so as to be reciprocally moved in an arc shape, and a movable unit drive unit that reciprocates the movable unit in an arc shape. It is characterized by being configured.

According to a third aspect of the present invention, there are two shadow mask portions, an outer peripheral unnecessary portion sandwiched between the shadow mask portions, and a connection unnecessary portion that connects the shadow mask portions to each other. In the device for removing the unnecessary peripheral portion of the shadow mask from the thin metal plate, which removes the unnecessary connecting portion from the metal thin plate having the linear half-etched portions that are parallel to each other and separates the unnecessary portions, each shadow mask portion is A pair of holding means for holding in a horizontal posture, and a radius of gyration corresponding to the width of the connection-unnecessary portion at least one of the pair of holding means in a state where the pair of holding means holds each shadow mask portion in a horizontal posture. And a reciprocating means for repeatedly reciprocating in an arc shape.

The invention according to claim 4 is the apparatus according to claim 3, wherein the reciprocating means alternately reciprocates a pair of holding means.

In the apparatus of the invention according to claim 1 having the above-mentioned structure, as shown in FIG. 10, the shadow mask portion 1 of the metal thin plate is fixed by the holding means 100 and 102, and the metal thin plate is located inside the half etching portion 2. Retained. This
As shown in FIG.
For the thin metal plate to which the bracket 1 is fixed,
The gripping means and swinging means move in the direction along the thin metal plate surface.
Of the gripping means that is swung by the swinging means.
At the center of the circle containing the arc-shaped movement locus
It is positioned so that the ching part is located. Then, the gripping means 104 grips the outer peripheral unnecessary portion 3 of the thin metal plate, and the swinging means swings the gripping means 104 in an arc shape. As a result, the outer peripheral unnecessary portion 3 gripped by the gripping means 104 is repeatedly swung about the half-etched portion 2, and a bending force is intensively applied to the half-etched portion 2 to cause fatigue damage to the half-etched portion 2. Then, the shadow mask portion 1 of the thin metal plate and the outer peripheral unnecessary portion 3 are separated by the half etching portion 2, and the outer peripheral unnecessary portion 3 is formed.
A shadow mask from which is removed is obtained.

At this time, since the outer peripheral unnecessary portion 3 of the thin metal plate swings about the half etching portion 2, the holding means 100, 102 are held with respect to the shadow mask portion 1 of the thin metal plate.
The bending force does not act on the position of the end portion 9 fixed by. Further, since it suffices that the outer peripheral unnecessary portion 3 of the metal thin plate can be grasped by the gripping means 104, even if the width dimension of the outer peripheral unnecessary portion 3 becomes small, the outer peripheral unnecessary portion 3 of the metal thin plate.
Can be swung about the half-etched portion 2 to effectively fatigue-break the half-etched portion 2. Further, the half-etched portion 2 of the thin metal plate is fatigue-fractured and the cut surface of the shadow mask portion 1 from which the unnecessary outer peripheral portion 3 is cut off, the bending force is intensively applied to the half-etched portion 2 so that the half-etched portion 2 is cut. Since it was fatigue-damaged, it was smooth, and no iron powder was generated when the unnecessary outer peripheral portion 3 was separated. Even if the half-etched portion 2 of the thin metal plate is fatigue-damaged and the outer-periphery-unnecessary portion 3 is separated from the shadow mask portion 1 and then the outer-periphery-unnecessary portion 3 is swung, the removed pieces of the outer-periphery-unnecessary portion 3 are removed. , Gripping means 1
Since the outer peripheral unnecessary portion 3 is simply swung around the end portion of the shadow mask portion 1 while being held by 04.
The end portion of the removed piece does not exert any force on the end portion of the shadow mask portion 1.

In the apparatus of the invention according to claim 2 having the above structure, the pair of pressing members 10 is driven by the pressing member driving means.
0 and 102 are brought close to each other, and a pair of upper and lower holding members 10
The shadow mask portion 1 of the metal thin plate is clamped and fixed from both upper and lower sides by 0 and 102, and the metal thin plate is held inside the half etching portion 2. Then, the outer peripheral unnecessary portion 3 of the thin metal plate is grasped by the grasping means 104 of the movable unit, and the movable unit supported by the supporting means is reciprocally moved in an arc shape by the movable unit driving means. Thereby, the gripping means 104 of the movable unit
The outer peripheral unnecessary portion 3 gripped by is repeatedly rocked around the half-etched portion 2, and a shadow mask from which the outer peripheral unnecessary portion 3 is removed is obtained as described above.

Further, in the device of the invention according to claim 3 having the above structure, as shown in FIG. 11, a pair of holding means 100,
102; 100 and 102 respectively fix the shadow mask portions 5a and 5b of the metal thin plate, and hold the metal thin plate. In this state, the reciprocating means 106 stops the holding means 100, 102 to which one shadow mask portion 5a (or 5b) is fixed, as shown in FIG. 11A (or FIG. 11B). And holding means 10 for fixing the other shadow mask portion 5b (or 5a).
0 and 102 are rotated in an arc shape with a rotation radius r corresponding to the width of the connection unnecessary portion 6 while maintaining the horizontal posture. Along with this, the connection unnecessary portion 6 is formed on one half etching portion 7a.
With (or 7b) as a fixed center, the other half etching portion 7b (or 7a) is rotated so as to move on the circumference of the radius r. After that, the holding means 100 and 102, to which the other shadow mask portion 5b (or 5a) is fixed, rotate in an arc-shaped reverse direction with a radius of rotation r while maintaining a horizontal posture and return to the original position. By this operation, a bending force acts on each of the two half-etched portions 7a and 7b of the thin metal plate. By repeating this operation, or by alternately repeating the operation shown in FIG. 11A and the operation shown in FIG. 11B once or a plurality of times, each half etching unit 7a. , 7b are fractured by fatigue, and the connection unnecessary portion 6 is separated and removed from the shadow mask portions 5a, 5b.

At this time, in the thin metal plate, the connection-unnecessary portion, which is a part of the thin metal plate, only rotates in an arc shape with a small radius of rotation corresponding to its width. Further, since the two half-etched portions 7a and 7b are simultaneously fatigue-broken in one step, the work time can be shortened.

Further, in the apparatus of the invention according to claim 4 having the above-mentioned structure, the shadow mask portions 5a and 5b of the metal thin plate are fixed by the pair of holding means 100 and 102, and the metal thin plate is held. In this state, as shown in FIG. 11A, the reciprocating means 106 holds the one shadow mask portion 5a and the holding means 100, 102.
While holding the other shadow mask portion 5b, the holding means 100 and 102 are rotated in an arc shape with a rotation radius r corresponding to the width of the connection unnecessary portion 6 while maintaining the horizontal posture. After that, the holding means 100 and 102, to which the other shadow mask portion 5b is fixed, rotate in an arc-shaped reverse direction at the radius of rotation r while maintaining a horizontal posture and return to the original position. Next, by the reciprocating means 106, (b) of FIG.
As shown in FIG. 7, the holding means 100, 102 to which the other shadow mask portion 5b is fixed are stopped, and the holding means 100 and 10 to which the one shadow mask portion 5a is fixed are stopped.
2 is rotated in an arc shape with a radius of rotation r corresponding to the width of the connection unnecessary portion 6 while maintaining the horizontal posture. After that, holding means 100, 102 with one shadow mask portion 5a fixed
Keeps a horizontal posture and turns in an arcuate direction in the opposite direction with a radius of rotation r to return to the original position. In this way, each holding means 10
0 and 102 are kept horizontal, and a pair of holding means 100 and 102 are alternately reciprocated one by one or a plurality of times in an arc shape with a radius of rotation r corresponding to the width of the connection unnecessary portion. Thus, as described above,
The connection unnecessary portion 6 is separated and removed from the shadow mask portions 5a and 5b.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described below with reference to the drawings.

1 and 2, the outer peripheral unnecessary portion 3 is separated and removed from the metal thin plate on which the linear half-etched portion 2 is formed along the peripheral shape of the shadow mask portion 1 as shown in FIG. 1 shows an example of the configuration of an apparatus used for the above, FIG. 1 is a front view showing a state before work, and FIG. 2 is a top view showing a state at work. ing. 1 and 2, only one pair of left and right outer periphery removing units 10 are provided, and an apparatus configuration for separating the left and right outer periphery unnecessary portions 3 and 3 from the thin metal plate is shown. When the outer peripheral unnecessary portion is simultaneously cut off from the thin metal plate, two pairs of the peripheral unnecessary portion removing units 10 are provided.

In this apparatus, a pair of upper and lower clamp plates 12 and 14 for holding a thin metal plate 4 as shown in FIG.
And a pair of left and right outer peripheral unnecessary portion removing units 10. One of the pair of upper and lower clamp plates 12, 14, for example, a lower clamp plate 14 is fixed, and the other upper clamp plate 12 is supported so as to be vertically movable. The upper clamp plate 1 is then driven by a clamp plate drive mechanism (not shown).
In the state in which 2 is moved upward, the metal thin plate 4 is inserted between both clamp plates 12 and 14 by a carry-in mechanism (not shown) and placed on the lower clamp plate 14, and thereafter, the upper clamp is driven by the clamp plate drive mechanism. The plate 12 is lowered so that the upper clamp plate 12 holds the thin metal plate 4 between it and the lower clamp plate 14. After the work is completed, the upper clamp plate 12 is lifted by the clamp plate drive mechanism to remove the shadow mask from which unnecessary outer peripheral portions are removed.
It is taken out from the lower clamp plate 14 by a take-out mechanism (not shown). As shown in FIG. 2 (only the upper clamp plate 12 is shown in FIG. 2), the clamp plates 12 and 14 are slightly smaller in plan view than the shadow mask portion 1 of the thin metal plate and are almost the same as the shadow mask portion 1. It has a similar shape.

The outer peripheral unnecessary portion removing unit 10 includes a pair of chuck blades 1 for holding an outer peripheral unnecessary portion 3 of a thin metal plate.
A movable unit 16 having a circular arc guide rail 20 integrally formed with the movable unit 16;
Support mechanism 22 that includes four guide rollers 24 that are in rolling contact with each of the guide rails 20 and that supports the movable unit 16 so as to reciprocate in an arc, and a movable unit drive mechanism 26 that causes the movable unit 16 to reciprocate in an arc. It consists of and. Further, each removing unit 10 is horizontally reciprocated by a horizontal moving mechanism 28 so as to move forward and backward with respect to the thin metal plate 4 held by the pair of clamp plates 12 and 14.

The chuck blade 18 of the movable unit 16
2 has an elongated plate shape capable of gripping the outer peripheral unnecessary portion 3 of the metal thin plate over substantially the entire length thereof, as shown in FIG. 2, and each chuck blade 18 is provided at two locations. As shown in FIG. 3, a pair of upper and lower swing plates 30,
32; 34, 36. Each rocking plate 3
0, 32; 34, 36 are (B) in FIG. 3 (BB in FIG. 2).
It is rotatably supported by each support shaft 38, as shown in (Cross-sectional view taken along arrow) and (C) (C-C cross-sectional view in FIG. 2).
Further, as shown in FIG. 3B, one lower swing plate 3
2, the other end of a tension coil spring 42, one end of which is fixed to the frame plate 40, is connected to the upper and lower rocking plates 30 and 32 via a mounting plate 44 so that the pair of upper and lower rocking plates 30 and 32 is biased in the opening direction. There is. Further, as shown in FIG. 3C, a contact piece 48 is attached to the lower swing plate 36 on the other side through a mounting plate 46, while a chuck cylinder is attached to the frame plate 50. 52 is fixed, and the rod 5 of the chuck cylinder 52 is fixed.
The tip of 3 is in contact with the contact piece 48 in a pressed state. The rod 53 of the chuck cylinder 52 is always contracted, so that the upper and lower rocking plates 30, 32;
36 is in a state of being expanded by the biasing force of the tension coil spring 42, as indicated by the chain double-dashed line in FIG. The horizontal movement mechanism 28 advances the pair of removing units 10 with respect to the thin metal plates 4 held by the pair of clamp plates 12 and 14, respectively, and the movable unit 16 expands the pair of chuck blades 18. , 18, the chuck cylinder 52 is driven to extend the rod 53 when the outer periphery unnecessary portion 3 of the thin metal plate is positioned. As a result, the pair of upper and lower swing plates 3 resists the elastic force of the tension coil spring 42.
0, 32; 34, 36 are respectively closed, and the outer peripheral unnecessary portion 3 of the thin metal plate is gripped by the pair of chuck blades 18, 18 of the movable unit 16.

As shown in FIG. 4 , the movable unit drive mechanism 26 includes a crank motor 54 and the crank motor 54.
Crank plate 56 fixed to the motor shaft, and a connecting plate 5 having a lower end rotatably pivotally attached to one end of the crank plate 56 and an upper end pivotally attached to the movable unit 16.
It is composed of 8. In the movable unit drive mechanism 26 having such a configuration, when the crank motor 54 is rotationally driven, the crank plate 56 rotates in one direction as shown in FIGS. Connection plate 5
The movable unit 16 connected via 8 reciprocates in an arc by the guide action of the guide rail 20 and the four guide rollers 24. At this time, the outer peripheral unnecessary portion 3 is gripped by the pair of chuck blades 18, 18 of the movable unit 16 so that the half-etched portion 2 of the thin metal plate is located at the center of the circle including the arc of the guide rail 20. The bending force repeatedly acts on the half-etched portion 2 in a concentrated manner, and the half-etched portion 2 is fatigue-damaged and the outer peripheral unnecessary portion 3 is separated from the shadow mask portion 1.

The movable unit drive mechanism is not limited to the structure utilizing the crank motion as described in the above embodiment, and for example, a gear is formed on the outer peripheral side surface of the arc-shaped guide rail of the movable unit, It is also possible to provide a pinion gear that meshes with the gear and make the movable unit reciprocate in an arc by repeatedly rotating the pinion gear forward and backward by a motor. Alternatively, the movable unit may be reciprocated in an arc by connecting the rods and repeatedly expanding and contracting the air cylinder. Further, the holding means for holding the outer peripheral unnecessary portion of the thin metal plate is not limited to that of the above embodiment. Further, in the description of the above embodiment, the clamp plate is
The plane shape was slightly smaller than the shadow mask part of the thin metal plate and was formed to be similar to the shadow mask part, but the bending force acting on the thin metal plate by the arcuate reciprocating motion of the movable unit is the half etching of the thin metal plate. Since the shadow mask part is concentrated on the shadow mask part and bending force does not act on the shadow mask part, if the shadow mask part of the thin metal plate can be securely fixed, the planar shape of the clamp plate is slightly smaller than the shadow mask part of the thin metal plate and the shadow mask part It does not necessarily have to have a shape similar to that of the section. Further, it is possible to cope with a plurality of types of thin metal plates having different sizes and shapes of the shadow mask portion by using one type of clamp plate. Furthermore, in the description of the above embodiment, the clamp plate is formed so that its planar shape is smaller than the shadow mask portion of the thin metal plate, but only one of the unnecessary peripheral parts of the thin metal plate is eaten from the clamp plate. To put out
The thin metal plate may be held by the clamp plate. Therefore, it is not always necessary that the planar shape of the clamp plate is smaller than the shadow mask portion of the thin metal plate.

In the above embodiment, the case where the outer peripheral unnecessary portion is separated from one metal thin plate has been described. However, a plurality of metal thin plates are stacked and held by a pair of clamp plates, and a plurality of metal thin plates are held. The unnecessary outer circumference of the thin plate may be gripped by a pair of chuck blades, and the unnecessary outer circumference may be separated from a plurality of metal thin plates at once.

Next, FIGS. 5 to 7 show two shadow mask portions 5 as shown in FIG. 15 after the unnecessary outer peripheral portion is separated and removed from the metal thin plate on which the two shadow mask portions are formed side by side. 5 are connected by the connection-unnecessary portion 6, and the connection-unnecessary portion 6 is separated from the metal thin plate in which the linear half-etched portions 7, 7 are formed between the shadow mask portions 5 and the connection-unnecessary portion 6, respectively. FIG. 5 is a view seen from the front, and FIG. 6 shows a shadow mask portion of a metal thin plate clamped from both upper and lower sides and fixed to fix the metal thin plate. FIG. 7 is a view of a state in which a pair of upper and lower clamp plates for holding is removed, as viewed from above, and FIG. In this device, a pair of upper and lower clamp plates 62 and 64 for holding the metal thin plate 8 by sandwiching and fixing the thin metal shadow mask portion 5 and a removing unit 60 of a connection unnecessary portion are respectively shown in the drawing. In FIG. 5 and FIG. 6, only the right one is shown.

In this apparatus, the upper clamp plate 62 is liftably supported so that the upper clamp plate 62 approaches and separates from the lower clamp plate 64. Then, in a state in which the upper clamp plate 62 is moved upward by the clamp plate drive mechanism (not shown), the metal thin plate 8 is inserted between the clamp plates 62, 64 by the carry-in mechanism (not shown) and placed on the lower clamp plate 64. After being placed, the upper clamp plate 62 is lowered by the clamp plate drive mechanism, and the thin metal plate 8 is held between the upper clamp plate 62 and the lower clamp plate 64. After the work is finished, the upper clamp plate 62 is lifted by the clamp plate drive mechanism, and the shadow mask from which the unnecessary portions for connection are removed is taken out from the lower clamp plate 64 by the take-out mechanism (not shown). The clamp plates 62 and 64 are slightly smaller in plan view than the shadow mask portion 5 made of a thin metal plate, and are substantially similar to the shadow mask portion 5. Since the lower clamp plate 64 swings as described later, the upper clamp plate 6 is
2 has a mechanism for following the swinging motion of the lower clamp plate 64.

The removal unit 60 for the connection-unnecessary portion has a pair of left and right rotating discs 66, 66 respectively on the front and rear sides. Are fixed to each other, and the pair of left and right rotating discs 66, 66 on the rear side are fixed to the driven shaft 70 with the center of the disc and the shaft center aligned. The drive shaft 68 and the driven shaft 70 are rotatably supported by a pair of left and right bearings 74, 74 fixed upright on a mounting base 72, and are arranged in parallel in a horizontal posture. . A connecting member 76 is fixed to the drive shaft 68, while a support member 78 is erected and fixed on the mounting base 72 on the mounting base 72.
An air cylinder 80 having a rear end portion rotatably attached to the air cylinder 80 is disposed in the front end portion of the rod 82 of the air cylinder 80 as shown in FIG. And a connecting member 76 are pivotally attached to each other. Then, by driving the air cylinder 80 to expand and contract the rod 82, the drive shaft 68 can be rotated via the connecting member 76. Further, the drive shaft 68 and the driven shaft 70 are respectively fixed with other connecting members 84 and 86, and the IX-IX arrow end view of FIG. 6 is shown in FIG.
As shown in FIG.
Both ends of 8 are rotatably pivoted. Since the parallel link mechanism is formed by both the connecting members 84 and 86 and the parallel link rod 88 in this way, when the air cylinder 80 is driven to rotate the drive shaft 68, the driven shaft 70 becomes the drive shaft. It turns in the same direction as 68 by the same angle.

Eccentric shafts 90 and 92 are attached to the pair of front and rear left and right rotating discs 66, respectively. The pair of left and right eccentric shafts 90, 90; 92, 92 are mounted on the same axis. In addition, the front eccentric shaft 90
The rear eccentric shaft 92 is eccentric to the drive shaft 68 and the driven shaft 70 by the same distance r, and is attached at the same angle. On the outer surface of each rotating disc 66,
An adjusting groove 94 is formed, and the mounting positions of the eccentric shafts 90 and 92 can be adjusted along the adjusting groove 94. The axis of the drive shaft 68 and the driven shaft 70 and the eccentric shaft 9 are adjusted.
The distance r from the axes of 0 and 92 is the same as the width r of the connection unnecessary portion 6 of the thin metal plate 8 while observing the scale (not shown) provided along the adjusting groove 94 of the rotating disk 66. Is adjusted so that A connecting plate 96 is rotatably attached to each of the eccentric shafts 90 and 92, and the eccentric shafts 90 and 92 and the lower clamp plate 64 are attached via the connecting plate 96.
Is connected to the bottom surface of.

In the removing unit 60 having the above-described structure, when the air cylinder 80 is driven and the rod 82 expands and contracts, the drive shaft 68 and the driven shaft 70 rotate in the forward and reverse directions, and each rotating disk. 66 rotates in the forward and reverse directions,
Along with that, the eccentric shafts 90 and 92 reciprocate in an arc shape on the circumference of the radius r with the center of each rotating disk 66 (the center of each of the drive shaft 68 and the driven shaft 70) as the center of rotation. As a result, the pair of clamp plates 62 and 64 to which the shadow mask portion 5 of the metal thin plate 8 is fixed swings while maintaining the horizontal posture. Then, a pair of removing units 60, 60 provided on the left and right sides of the paper are alternately and alternately once (air cylinder 80
As described above with reference to FIG. 11, the connection-unnecessary portion 6 rotates the one half-etched portion 7 as the fixed center and the other half-etched portion 7 rotates by repeatedly driving the rod 82 of each of the rods 82 twice. The half-etched portion 7 reciprocates in an arc shape with a radius r, and then the other half-etched portion 7 reciprocates in an arc shape with a radius of rotation r with the other half-etched portion 7 as a fixed center, and this operation is repeated. As a result, a bending force acts on each of the two half-etched portions 7, 7 of the thin metal plate 8, and each half-etched portion 7 is fatigue-broken.

Further, when each half-etched portion 7 of the metal thin plate 8 is fatigue-fractured, the metal thin plate 8 is not always cut by both half-etched portions 7, 7. Therefore, although not shown, a pair of chuck devices for gripping the left and right ends of the connection unnecessary portion 6 of the metal thin plate 8 are provided, and the half etching portion 7 of the metal thin plate 8 is provided.
When the fatigue damage is caused to a considerable extent, the chuck device is moved upward or downward to forcibly separate the connection unnecessary portion 6 from each shadow mask portion 5.
Alternatively, the left and right ends of the unneeded connection portion 6 of the metal thin plate 8 are gripped by a pair of chuck devices, and when the half-etched portion 7 of the metal thin plate 8 is fatigue-damaged to a considerable extent, the pair of removal units 60. Alternatively, the shadow mask portions 5 and the connection unnecessary portions 6 may be separated by moving them in directions away from each other. In addition, when the half-etched portion 7 of the thin metal plate 8 is fatigue-damaged to a considerable extent, the connection-unnecessary portion 6 may be attracted and moved upward or downward by a magnet or a vacuum pad, or the connection-unnecessary portion. It is also possible to apply a light impact to 6 and let the connection unnecessary portion 6 fall naturally.

The removal unit for the unneeded connection is not limited to the configuration as described in the above embodiment, but may be any mechanism as long as it can perform the operation described in FIG. Good. Further, as the driving means, a motor or the like may be used instead of the air cylinder. Also,
In the above embodiment, the case where the connection unnecessary portion is separated from one metal thin plate has been described. However, in the state where a plurality of metal thin plates are stacked, two shadow mask parts are fixed by a pair of upper and lower clamp plates, respectively. It is also possible to separate the unneeded portions from a plurality of thin metal plates at one time and obtain two shadow masks each.

Further, in the above description, the pair of left and right removal units 60, 60 are alternately and repeatedly driven once to apply bending force to the two half-etched portions 7, 7 of the thin metal plate 8. Although each half-etched portion 7 is fatigue-destructed, a pair of left and right removing units 60, 60 may be alternately driven repeatedly a plurality of times. Also, the lower clamp plate 6
The removal unit 60 having the above-described configuration including the swinging mechanism of
Only one of the left and right sides is provided, and the other is a unit having only a pair of upper and lower clamp plates, and one of the two shadow mask portions 5 of the metal thin plate 8 is fixed without moving and the other shadow mask portion 5 is fixed. A configuration may be adopted in which only the mask portion 5 is repeatedly reciprocated and a bending force is applied to each of the two half-etched portions 7 of the metal thin plate 8.

[0037]

By using the device of the invention according to claim 1,
When the unnecessary peripheral portion of the shadow mask is cut off from the thin metal plate on which the linear half-etched portion is formed along the peripheral shape of the shadow mask, the edge portion of the obtained shadow mask is bent. Even if the width of the unnecessary outer periphery is reduced, the fatigue damage of the half-etched portion is effectively performed, and the outer peripheral unnecessary portion is separated from the thin metal plate. Even if the unnecessary portion is swung, the end portion of the shadow mask portion is not damaged by the removal piece of the peripheral unnecessary portion, and as a result, a shadow mask of excellent quality can be obtained.

Further, by using the apparatus according to the third aspect of the invention, the two shadow mask portions are connected after the unnecessary peripheral portion is separated and removed from the metal thin plate on which the two shadow mask portions are formed side by side. In the case where the connection-unnecessary portions are separated and removed from the metal thin plate on which the linear half-etched portions are formed in parallel between the shadow mask portions and the connection-unnecessary portions which are connected by the unnecessary portions, respectively,
The work can be performed automatically without manual work as in the past, and the size of the device can be reduced.
Since the half-etched portion of the book can be fatigue-fractured, the work efficiency is good.

[Brief description of drawings]

FIG. 1 is a front view showing an example of the configuration of an apparatus of the invention according to claim 1, showing a state before work.

FIG. 2 is a view of the device shown in FIG. 1 seen from above, showing a state during work.

3 shows a configuration example of a movable unit that is one of the components of the apparatus shown in FIG. 1, (A) is a front view of the movable unit, (B) is a movable unit, and B- in FIG. 2B is a sectional view taken along the arrow B, and FIG. 3C is a sectional view taken along the line CC of FIG. 2 showing the movable unit.

FIG. 4 is a front view showing a configuration example of a movable unit drive mechanism that is one of the constituent elements of the device shown in FIG. 1 and explaining an operating state of the movable unit by the movable unit drive mechanism.

FIG. 5 is a partial front view showing an example of the configuration of the device of the invention according to claim 3 ;

6 is a view of the device shown in FIG. 5 as seen from above with the clamp plate removed.

7 is a view of the device shown in FIG. 5 as viewed from the right side with the upper clamp plate omitted.

8 is an end view taken along the line VIII-VIII in FIG.

9 is an end view taken along the line IX-IX in FIG.

FIG. 10 is a diagram for explaining the operation of the invention according to claim 1;

FIG. 11 is a diagram for explaining the operation of the invention according to claim 3 ;

FIG. 12 is a plan view of a thin metal plate on which linear half-etched portions are formed along the peripheral shape of the shadow mask portion.

FIG. 13 is a schematic view showing an example of a configuration of a conventional apparatus used for separating and removing an unnecessary outer peripheral portion from a metal thin plate on which linear half-etched portions are formed along a peripheral shape of a shadow mask portion. It is a figure.

FIG. 14 is a partial schematic diagram for explaining the operation of the conventional device shown in FIG. 13 and a problem in the device.

FIG. 15 is a plan view of the metal thin plate after the unnecessary outer peripheral portion is separated and removed from the metal thin plate formed by arranging two shadow mask portions.

FIG. 16 is a perspective view showing a shadow mask portion with an unnecessary outer peripheral portion removed 2
It is a schematic perspective view for demonstrating the conventional method in the case of trying to obtain two shadow masks by cutting the said connection unnecessary part from the metal thin plate which one shadow mask part was connected by the connection unnecessary part.

[Explanation of symbols]

1, 5 Shadow mask part of thin metal plate 2,7 Half-etched part of thin metal plate 3 Unnecessary outer circumference of thin metal plate 6 Connection unnecessary part of thin metal plate 4, 8 Metal thin plate 10 Removal unit for unnecessary outer circumference 12, 14, 62, 64 Clamp plate 16 movable units 18 Chuck blade 20 Guide rails for movable units 24 Guide roller 26 Movable unit drive mechanism 60 Removal unit for unnecessary connection 66 rotating disk 68 Drive shaft 70 Driven shaft 80 air cylinder 88 Parallel link rod 90, 92 Eccentric shaft 96 connecting plate

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomizo Ohashi 1 at 480 Takamiya-cho, Hikone-shi, Shiga 1 Dainichihon Screen Mfg. Co., Ltd., Hikone District Business Office (72) Inventor Atsushi Okamoto 8 Minami-cho, Mishima-shi No. 7 Okamoto Giken Co., Ltd. (56) Reference JP 4-71138 (JP, A) JP 63-216699 (JP, A) Actual development 61-172131 (JP, U) Actual development Sho 59 -132696 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01J 9/14 B26F 3/00

Claims (4)

(57) [Claims] 1. A shadow mask part formed from a thin metal plate, wherein the unnecessary outer circumference part is removed from a thin metal plate on which a linear half-etched part is formed so as to partition the shadow mask part and the unnecessary outer circumference part. In the removing device, a holding means for holding the shadow mask portion of the metal thin plate, a gripping means for gripping an outer peripheral unnecessary portion of the metal thin plate , and a gripping means for gripping the outer peripheral unnecessary portion of the metal thin plate > a swinging means for swinging in an arc around the half etching portion, the circle of the gripping means to be swung by the swinging means
At the center of the circle containing the arc-shaped locus,
The holding means so that the
The metal thin plate holding the mask
The moving means and the swinging means in the direction along the surface of the thin metal plate.
And a moving mechanism for removing the unnecessary portion of the shadow mask from the thin metal plate. 2. A pair of upper and lower holding members for holding the shadow mask portion of the thin metal plate by fixing the holding unit, and a holding member driving unit for moving the pair of holding members toward and away from each other. A movable unit in which the swinging unit is provided with the gripping unit and is reciprocally moved in an arc, and a supporting unit that supports the movable unit in an arc reciprocating manner.
The device for removing an unnecessary outer peripheral portion of a shadow mask from a thin metal plate according to claim 1, comprising a movable unit driving means for reciprocating the movable unit in an arc shape. 3. Two shadow mask parts, an unneeded part sandwiched between the shadow mask parts and an unneeded part that connects the shadow mask parts to each other, and a shadow mask part and an unneeded part are respectively partitioned. In a device for removing an unnecessary portion of the periphery of a shadow mask from a metal thin plate, which removes the connection unnecessary portion from a metal thin plate having linear half-etched portions that are parallel to each other, a pair that holds each shadow mask portion in a horizontal posture. Holding means and the pair of holding means hold each shadow mask portion in a horizontal posture, and at least one of the pair of holding means is repeatedly reciprocated in an arc shape with a radius of rotation corresponding to the width of the connection unnecessary portion. An apparatus for removing an unnecessary peripheral portion of a shadow mask from a thin metal plate, comprising a reciprocating means for moving. 4. The reciprocating means reciprocally moves the pair of holding means alternately.
An apparatus for removing an unnecessary outer peripheral portion of a shadow mask from the thin metal plate according to claim 3.