JPH0687009B2 - Component attitude detector - Google Patents

Description

Description: TECHNICAL FIELD The present invention is capable of accurately determining whether or not an object held by a holding device such as a suction nozzle is correctly held at high speed and reliably, and has high detection reliability. The present invention relates to a component posture detection device that can supply the characteristics.

2. Description of the Related Art As an example of a conventional component detection device, a component detection device of a chip type electronic component mounting machine will be described.

FIG. 2 shows a diagram relating to the mounting portion of the chip type electronic component. A chip-type electronic component 1 (hereinafter referred to as a chip component), which is a detection object, sucks and holds the chip component 1 by vacuum suction from a component supply unit 2 by a suction nozzle 4 of a mounting head 3 that rotates intermittently. Next, after the X and Y direction regulating section 6 regulates the positions in the X and Y directions, the suction posture of the chip component 1 is inspected by the detector 7, and the chip component 1 is conveyed to the printed circuit board 9 held by the XY table 8 and mounted. It

Conventionally, this type of device has adopted the following detection method. FIG. 3 shows a state in which the chip component 1 is normally sucked by the suction nozzle 4. In this case, two pairs of transmissive optical sensors (hereinafter, optical sensors) 10 and 11 are provided in two stages in the vertical direction. The optical sensor 10 is placed immediately below the suction nozzle 4 and determines the presence or absence of the chip component 1. The optical sensor 11 is below the lower end of the suction nozzle 4 below the thickness t of the chip component 1 and has a long side L.
It is installed within a smaller distance. At this time, if the optical sensor 10 is on, there is no chip component 1. Optical sensor 10
If is off and 11 is on, it means normal adsorption of Fig. 3,
If both the optical sensors 10 and 11 are off, it can be determined that the adsorption is abnormal as shown in FIG.

However, according to the above method, as shown in FIG. 5, even if the chip component 1 normally sucked by the suction nozzle 4 is normal in the thickness direction, 90, like 1a
There was a problem that detection was impossible if the direction was wrong in the horizontal plane.

In view of the above problems, the present invention provides a component posture detection device that can detect not only abnormal suction that occurs in the thickness direction of a detection object but also directional deviation that occurs in a horizontal plane.

Means for Solving the Problems In order to solve the above problems, the present invention is directed to a light source that emits parallel light and an adsorption nozzle that adsorbs and holds a detection component, and is arranged to face the light source. First to receive parallel light
Line sensor and second line sensor, and the detection component is inserted in a predetermined position between the light source and the first line sensor or the second line sensor, and by blocking a part of the parallel light, And a calculation processing unit that compares the projection data of the detection component obtained from the first line sensor and the second line sensor with predetermined data obtained in advance to detect the attitude of the detection component. Then, on the projection surface generated by the light source and the detection component, the light receiving surface of the first line sensor is horizontally arranged in the vicinity of the lower end of the suction nozzle, and the second line sensor has the light receiving surface of the suction nozzle. It is arranged in the vertical direction from the vicinity of the lower end so as to substantially coincide with the axis thereof.

Operation According to the present invention, with the above-described configuration, it is possible to determine by blocking the light by the detection object itself and comparing the abnormality in the thickness direction and the length direction with the previously input data.

Practical Example A component detecting device for a chip-type electronic component mounting machine according to an embodiment of the present invention will be described below with reference to FIG. First, the system configuration of this embodiment will be described. The sensor unit 12 measures the thickness and length of the suction component 1,
Send data to amplifier 13. On the other hand, at the same time, the controller 14 of the mounting machine main body sends the part number to the comparison value storage unit 16 through the input circuit 15, and the comparison value storage unit 16 sends out the standard data of the corresponding thickness and length. The data of the two thicknesses and lengths are compared by the arithmetic processing unit 17, and the determination result is sent to the controller 14 of the mounting machine body through the output circuit 18. Reference numeral 19 is a key input section for inputting standard data of the thickness and length of chip parts.

Next, the structure of the sensor unit 12 will be described. Sensor part
The outer shape of 12 is as shown in FIG. 7, and has a groove sufficient for the suction nozzle 4 and the chip component 1 to enter.
Then, a light source 20 that emits parallel light is embedded in one side wall of this groove, and a half mirror 21 is provided on the opposite side wall,
Line sensors 22 and 23 are embedded in the horizontal direction and the vertical direction, respectively, relative to the light source 20. Here, the line sensors 22 and 23 will be described. This sensor is a one-dimensional type of charge-coupled device (also called CCD) used as an imaging device. A large number of sensor elements are arranged on the light-receiving surface of the sensor, and each element can output a signal indicating whether or not it receives light from a light source. Therefore, when an object enters between the light source 20 and the line sensors 22 and 23 as shown in the figure, the spectrum is blocked and a shadow is projected on the light receiving surface of the sensor. At this time, by sequentially scanning the elements, it is possible to know how many elements have shadows. Reference numeral 24 is a slit that prevents excess light from entering the line sensors 22 and 23.

FIG. 1 shows the state of suction of the chip component 1 and the line sensor 2.
It shows the relationship with the light receiving part of 2,23. The thickness t of the chip component 1 is the length of the portion shielded from light by the line sensor 22 placed vertically in the thickness direction. On the other hand, the length L of the side of the chip component 1 is measured by the line sensor placed in the horizontal direction. By comparing the data t or L thus obtained with the preset data, it is possible to judge that the data is normal if it is within a certain tolerance and abnormal if it is outside the tolerance.

As described above, according to the present embodiment, the light source and the sensor capable of detecting the length in two directions of the horizontal direction and the vertical direction are provided, and the detection object held by the suction nozzle enters between them,
A sensor unit for detecting the thickness and length of the object by blocking a part of the light; a comparison storage unit for storing the thickness of the detected object and a horizontal dimension which are obtained in advance; By comparing the two thickness data, by providing an arithmetic processing unit that determines whether the detected object is correctly held, and whether or not the correct object is held,
Whether or not the detected object is adsorbed, whether the adsorbed posture is normal or abnormal, and whether or not it is the relevant part can be determined.

EFFECTS OF THE INVENTION As described above, according to the present invention, the suction nozzle has a horizontal direction in the vicinity of the lower end portion and a vertical direction that substantially coincides with the axis of the suction nozzle.
It has a set of line sensors that can detect the length in the direction, and the detection object held by the suction nozzle enters between the light source and the line sensor to block a part of the light, thereby increasing the thickness and length of the object. Whether or not the detected object is adsorbed by providing an arithmetic processing unit that compares the data obtained by detecting the height with the thickness of the detected object obtained in advance and the horizontal data to detect the attitude of the detected object. It is also possible to judge whether the sucked posture is normal or abnormal, and further to judge whether or not the part concerned.

[Brief description of drawings]

FIG. 1 is an explanatory view of the principle of detection in one embodiment of the present invention,
FIG. 2 is a perspective view of a chip component mounting machine, FIG. 3 is a vertical cross-sectional view of a conventional chip component suction part, FIG. 4 is the same vertical cross-sectional view in the case of abnormal suction, and FIGS. FIG. 7 is a block diagram of a component detection device of a chip component mounting machine according to an embodiment of the present invention, where FIG. 6 is a vertical sectional view and a plan view of a suction part when the chip components are displaced by 90 ° in a horizontal plane. 3B is a cross-sectional view and a plan view of the detection device and the sensor unit, respectively. 1 ... Chip part, 4 ... Suction nozzle, 10,11 ... Optical sensor, 12 ... Sensor section, 16 ... Comparison value storage section, 17 ... Calculation processing section, 20 ... Light source, 21 ... Half Mirrors, 22,23 ...
… A line sensor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Makoto Kawai, 1006 Kadoma, Kadoma City, Osaka Prefecture, Matsushita Electric Industrial Co., Ltd. (72) Kenichi Sato, 1006, Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. 56) References JP 61-25002 (JP, A) JP 60-86403 (JP, A)

Claims (1)

[Claims] 1. A component attitude detecting device for an electronic component mounting machine for picking up a component from a predetermined component supply section by a suction nozzle and mounting the component at a predetermined position on a substrate, wherein a light source for emitting parallel light and a suction component for holding the detected component. A first line sensor and a second line sensor, which are arranged to face the light source with an adsorption nozzle interposed therebetween, and which receive the parallel light; and the detection component is the light source and the first line sensor or the first line sensor. Projection data of the detection component, which is inserted at a predetermined position between the second line sensor and the first line sensor and the second line sensor by blocking a part of the parallel light, and previously obtained. And a calculation processing unit that detects a posture of the detection component by comparing the predetermined data with the predetermined data, and the first line on the projection surface generated by the light source and the detection component. The sensor has its light-receiving surface arranged horizontally in the vicinity of the lower end of the suction nozzle, and the second line sensor has its light-receiving surface arranged in the vertical direction from the vicinity of the lower end of the suction nozzle substantially in line with the axis. And component attitude detection device.