JPH09178449A - Front back judging device of thin-plate-like parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a judging device which provides front/back judging precision at low cost by judging front and rear in a condition in which a thin-plate- like part is in contact with a narrow part of a groove-like guide part and stops. SOLUTION: A conveyance passage 15 is connected with a conveyance passage 13. A wall 16 is formed at the other end of the conveyance passage 15, and a groove-like guide 17 in which an electronic gun part 12 is fed is formed in a central part thereof. The width of the guide 17 on a side in which the part 12 is fed from the conveyance passage 13 the same width as that of a groove-like guide 14 of the conveyance passage 13, and the other side is narrow and shut off by the wall 16. Consequently, a tip of the part 12 comes into contact with the wall 16, a part of upper side and lower side comes into contact with a part where the width of the guide 17 becomes narrow, and the part 12 stops at a fixed posture. Front and rear of the part 12 is judged by utilizing the fact that shape differs at point-symmetrical position for the center of the part 12, namely, between a position 12A and a position 12B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front / back discriminating apparatus for discriminating thin plate-shaped parts such as electron gun parts.

[0002]

2. Description of the Related Art For example, an electron gun used in a television receiver is composed of a plurality of thin plate-shaped parts. Such a thin plate-shaped electron gun component is usually manufactured by a press machine using a mold. The electron gun parts produced by the press machine are then automatically welded and assembled into an electron gun. When the electron gun parts are welded and assembled into the electron gun, the front and back of the electron gun parts are determined in advance.

Here, a method of discriminating between the front and back of a thin plate-shaped component manufactured by a press machine such as an electron gun component will be described with reference to FIG.
And it demonstrates using FIG. In the case of thin plate shaped parts manufactured by a press machine, sagging occurs on the edge on the surface side,
Burrs occur on the edge of the back surface. Therefore, the front and back of the component can be detected by utilizing such sag and burrs. For example,
As shown in FIG. 6, the reflective sensor S is arranged above the thin plate-shaped component 61. Then, from the reflective sensor S to the solid line L1
The detection light is projected as in. At this time, in the case of sagging, the detection light is reflected sideways as indicated by the dotted line L2 because the edge 61a is rounded. Therefore, the reflected light returning to the reflective sensor S is small and the reflective sensor S is small. The reflected light is not detected by.

In the case of burrs, since the edge 71a of the thin plate-shaped component 71 is flat as shown in FIG. 7, the solid line detection light L1 emitted from the reflective sensor S is the edge 71a.
It is reflected by a and returns to the reflective sensor S. Therefore, the reflected light is detected by the reflective sensor S.
In this way, the front and back are distinguished by the magnitude of the reflected light detected by the reflective sensor S.

A conventional thin / plate-shaped component front / back discriminating apparatus will be described with reference to FIG. 2 by taking the case of discriminating the front / back of an electron gun component using the above-mentioned front / back discriminating method.
21 is a thin plate-shaped electron gun part, and the electron gun part 21 is shown in FIG.
As shown in the side view of (b), it has a thin shape of, for example, about 0.5 mm. Since the electron gun parts are manufactured by a press machine or the like, an arc-shaped convex sag 21a is formed on the surface of the peripheral portion as shown in FIG. 2C in which the circle A in FIG. 2B is enlarged. The burr 21b is formed on the other back surface.

Therefore, the detection light emitted from the sensor S from the upper surface of the electron gun part 21 is applied to the portion of the sag 21a, and the reflected light is detected by the sensor S. At this time, FIG. 2 (c)
In the case where the surface of the electron gun component 21 is at the upper side of the figure, the light is reflected by the convex surface of the sag 21a on the surface side, and the sensor S
No reflected light is detected at. On the other hand, when the back surface of the electron gun component 21 faces upward in the figure, the sensor S is
The light reflected by 1b is detected. This way burr 21b
Due to its shape, there is little reflection returning in the direction of the sensor S, less reflected light is detected by the sensor S, and the front and back of the electron gun component are discriminated.

Next, another example of the conventional front and back discriminating apparatus for thin plate-shaped parts will be described with reference to FIG. 31 is an electron gun part, and the electron gun part 31 is a point-symmetrical position with respect to the center O,
That is, the shapes of the first position 31A and the second position 31B are different. For example, the first position 31A has a protruding shape at the periphery, whereas the second position 31B has a notched shape. The front and back of the electron gun component 31 are determined by utilizing the partial difference in shape of the electron gun component 31.

For example, the light reflection type sensors S1 and S2 are arranged below the electron gun component 31 at positions corresponding to the first position 31A and the second position 31B, respectively. At this time,
At the first position 31A, the light is reflected because the periphery is protruding. On the other hand, since the second position 31B has a notched shape, light is not reflected. Therefore, the sensor S1 detects light, and the sensor S2 does not detect light. When the front and back of the electron gun component 31 are opposite to those shown in the figure, the light reflection type sensor for detecting reflected light is opposite. In this way, the front and back of the electron gun part 31 are determined.

Also, as shown in FIG.
There is also a method in which the front side and the back side of the electron gun component 41 are discriminated by performing image processing on the output obtained from the camera 42 with the camera 42.

[0010]

In any of the above-described conventional front and back discriminating apparatuses for thin plate-shaped parts, the front and back sides are discriminated on the conveying path for conveying the thin plate-shaped parts. By the way, the transport path for transporting the thin plate-shaped component is configured such that the thin plate-shaped component 53 moves along a groove-shaped guide 52 provided in the central portion of the transport path 51 as shown in FIG.

In this case, the thin plate-shaped component 53 is guided by the guide 52.
The width of the guide 52 is slightly larger than the width of the thin plate-shaped component 53 so that the groove portion can be moved. Therefore,
A gap g is formed between the thin plate-shaped component 53 and the side wall of the guide 52 in the vertical direction in the drawing, and the position of the thin plate-shaped component 53 is displaced in the vertical direction in the figure by the gap g. By the way, since the characteristic of the thin plate-shaped component 53 is used for the determination of the front and back of the thin plate-shaped component 53, even if the position of the thin plate-shaped component 53 is slightly shifted, the accuracy of discriminating between the front and back is reduced. .

In the case of a method of discriminating the front and back of a thin plate-shaped component by photographing the electron gun component with a camera, the positional deviation of the thin plate-shaped component does not pose a problem. However, the method using a camera requires space for equipment such as a camera and lighting. In addition, expensive equipment is required for high-speed image processing, and the method using a camera is not practical.

An object of the present invention is to solve the above-mentioned drawbacks, and to provide a front / back discriminating apparatus for a thin plate-shaped component which has a high front / back discriminating accuracy and is low in cost.

[0014]

According to the present invention, there is provided a device for discriminating front and back of a thin plate-shaped component, a component feeding device for feeding a thin plate-shaped component, and a groove-shaped member having a predetermined width for moving the component fed from the component feeding device. A first conveying path having a guide, one end side of which is connected to the groove-shaped guide and the other end side of which is formed narrower than a predetermined width of the groove-shaped guide, and a part of the part contacts the periphery of the part and the part And a front / back discriminating device for discriminating the front / back of the component in the state where the component is stopped on the second transport path. According to the above configuration, a part of the groove-shaped guide is narrowed, and the thin plate-shaped component comes into contact with the narrowed part of the groove-shaped guide portion and stops. In this manner, when the thin plate-shaped component is stopped, it is in mechanical contact with the groove-shaped guide portion, so that its stop position is constant. Therefore, if the front and back are discriminated with the thin plate-shaped component stopped, the characteristic fine shape of the thin plate-shaped component can be surely discriminated, and the front and back discriminating accuracy is improved. Further, the structure for stopping the thin plate-shaped component can be realized with a simple structure by only narrowing the width of the groove-shaped guide. Moreover, since no camera is used, a large space is not required.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to FIG. 1 by taking an electron gun component as an example.
Reference numeral 11 denotes a component supply device for delivering a thin plate-shaped electron gun component. A large number of electron gun components are housed inside the component supply device 11, and the electron gun components 12 are sequentially delivered from the component supply device 11 in the direction of the arrow Y1 by utilizing, for example, vibration. The electron gun component 12 sent out from the component supply device 11 moves along the first transport path 13. A groove-shaped guide 14 having a predetermined width, which is slightly larger than the width of the electron gun component 12, is formed in the central portion of the first transport path 13, and the electron gun component 12 is grooved so as to be pushed out to another electron gun component in the rear. The inside of the guide 14 is moved.

A second transport path 15 is connected to the first transport path 13. One end of the second transport path 15 has the first transport path 1
3 and a wall 16 is formed at the other end. A groove-shaped guide 17 into which the electron gun component 12 is fed is formed in the central portion. The width of the groove-shaped guide 17 on the side where the electron gun component 12 is fed from the first conveyance path 13 is the same as that of the groove-shaped guide 14 of the first conveyance path 13, and the other side is narrowed by the wall 16. It has been cut off. The width of the groove-shaped guide 14 on the other side is smaller than the width of the electron gun component 12. Therefore, the tip of the electron gun component 12 is in contact with the wall 16, and a part of the upper side or the lower side is in contact with the portion where the width of the groove-shaped guide 14 is reduced.
Cannot move and stops. At this time, the electron gun component 12 is sandwiched between the wall 16 and the narrow groove guide 14, and stops in a substantially constant posture.

Then, in this stopped state, the electron gun component 1
The front and back of 2 are discriminated. For example, the front and back are distinguished by utilizing the fact that the electron gun component 12 has a point-symmetrical position with respect to the center O, that is, the shape is different between the first position 12A and the second position 12B. For example, the first position 12A has a projecting peripheral shape, while the second position 12B has a notched shape.

Then, for example, the first position 12A and the second position 12A
Light reflection type sensors S1 and S2 (not shown) are arranged on the back side of the figure at a position corresponding to the position 12B. At this time, the detection light emitted from the sensor is reflected because the periphery of the first position 12A is protruding. Also, the second position 12
Since B has a notched shape, the detection light is not reflected. Therefore, in this case, the light is detected by the sensor S1 corresponding to the first position 12A. When the front and back of the electron gun component 12 are reversed, the light is detected by the sensor S2 corresponding to the second position 12B. In this way, the front and back of the electron gun component 12 are determined. If the front and back of the electron gun component 12 are determined to be in the normal orientation, the electron gun component 12
Is sent in the direction of arrow Y2 by using, for example, a cylinder and is moved to the third transport path 18.

A groove-shaped guide 19 having a width slightly larger than the width of the electron gun component 12 is formed in the central portion of the third transport path 18 so that the electron gun component 12 can move, and it is determined that the direction is normal. The electron gun component 12 is sent to the next step along the groove-shaped guide 19 of the third transport path 18. The electron gun component 12 determined not to have the normal orientation is sent back to the component supply device 11 using, for example, air.

In the above-mentioned embodiment, the electron gun component is taken as an example. However, it can be applied to the determination of the front and back of other thin plate shaped parts. In addition, another method can be used as the method of discriminating between the front and back of the electron gun component.

[0021]

According to the present invention, it is possible to realize a front / back discriminating apparatus for a thin plate-shaped component with high detection accuracy.

[Brief description of the drawings]

FIG. 1 is a schematic structural diagram showing an embodiment of the present invention.

FIG. 2 is a schematic structural diagram illustrating a conventional example.

FIG. 3 is a schematic structural diagram illustrating a conventional example.

FIG. 4 is a schematic structural diagram illustrating a conventional example.

FIG. 5 is a schematic structural diagram illustrating a conventional example.

FIG. 6 is a diagram illustrating a method of discriminating between front and back of thin plate-shaped components.

FIG. 7 is a diagram illustrating a method of discriminating between the front and back of thin plate-shaped components.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Component supply device 12 ... Electron gun component 13 ... 1st conveyance path 14 ... Groove guide 15 ... 2nd conveyance path 16 ... Wall 17 ... Groove guide 18 ... 3rd conveyance path 19 ... Groove guide

Claims (1)

[Claims] 1. A component feeding device for feeding a thin plate-shaped component, a first conveying path having a groove-shaped guide of a predetermined width along which the component fed out of the component-moving device moves, and one end side of the groove-shaped guide. A second conveyance path having a groove-shaped guide that is connected to the other end side and is formed narrower than a predetermined width of the groove-shaped guide, and a part of the groove-shaped guide contacts the periphery of the component to stop the component; (2) A front / back discriminating apparatus for a thin plate-shaped component, comprising a front / back discriminating device for discriminating the front / back of the component in a state where the component is stopped on the conveyance path.