JPH0720960Y2 - Electronic component mounting equipment - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to an electronic component mounting apparatus, in which a camera for recognizing an electronic component mounted on a mounting head is driven in the XY directions, and a corner portion of the electronic component is driven. By recognizing, the positional deviation is detected.

(Prior Art) As a device for mounting electronic parts such as IC and LSI on a substrate at a high speed, one provided with a rotary head is known. FIG. 5 is a plan view of a conventional mounting apparatus for electronic components of this type, in which an electronic component supply unit 101 is provided below the rotary head 100.
The mount part 102 is provided, and the electronic part recognition camera 103 is provided between the parts 101 and 102. The operation will be described. In the supply unit 101, the mounting head 104 of the rotary head 100 is moved up and down to adsorb the electronic component to the lower end portion thereof, and the electronic component is positioned on the mount unit 102 by rotating the rotary head 100 in the N direction. It is transferred to the substrate 105 and mounted, but in the middle of the process, the electronic component adsorbed to the lower end of the mounting head 104 is recognized from below by the camera 103, and the positional deviation in the XYθ direction is detected, and the detection result is obtained. In accordance with a correction command based on, the motor 106 is driven to correct the mounting head 104 in the θ direction, and the XY tables 107 and 108 are driven to correct the XY direction so that electronic components are correctly mounted on the substrate 105. Has become.

(Problems to be solved by the invention) By the way, although electronic parts are large and small, in order to improve the mounting accuracy, it is necessary to accurately detect the positional deviation of the electronic parts by the camera 103. Thus, as shown in FIG. 6, in the case of a small electronic component CS, the magnification of the camera 103 can be increased to reduce the field of view A1 thereof, and the entire electronic component CS can be correctly recognized to improve the mounting accuracy. However, in the case of a large electronic component CL, the position shift cannot be recognized in the visual field A1, so the magnification must be reduced to a large visual field A2 so that the entire electronic component CL can be recognized.
However, when the magnification of the camera 103 is reduced in this way, the recognition accuracy is lowered accordingly, and as a result, the mounting accuracy is also lowered. Particularly, in the case of an electronic component having leads L in four directions as shown in the drawing, extremely high mounting accuracy is generally required. However, since the above conventional means cannot expect good positional deviation detection accuracy, it is necessary. There was a problem that it was difficult to obtain mounting accuracy.

Therefore, an object of the present invention is to provide an electronic component mounting apparatus provided with a recognition unit capable of detecting positional deviations of various electronic components of various sizes with high accuracy.

(Means for Solving the Problems) Therefore, in the present invention, in this type of rotary head type electronic component mounting device, an electronic component recognition camera is mounted on an XY moving device and the XY moving device is driven. Thus, at least one corner of the electronic component mounted on the mounting head and transferred from the supply unit to the mount unit is recognized by the camera, and the positional deviation is detected.

(Operation) In the above-mentioned configuration, in the case of a relatively small electronic component, its entire position is recognized within the field of view of the camera, and the positional deviation is detected by one recognition operation. Also, in the case of relatively large electronic components, the whole can not be put in the field of view, so by driving the XY moving device and sliding the camera in the XY direction, the corners of the electronic components are recognized and orthogonal By recognizing the displacement of the vertical and horizontal sides,
The displacement of this electronic component is detected.

(Example) Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of an electronic component mounting apparatus, in which reference numeral 1 is a rotary head, and an electronic component supply unit 2 is provided below the rotary head.
And a mount portion 3 are provided. Reference numeral 4 denotes a mounting head, which is hung vertically on the rotary head 1 along its circumferential direction. Reference numeral 5 is a recognition device for recognizing the electronic components mounted on the lower end of the mounting head 4 from below, and is arranged between the supply unit 2 and the mount unit 3. Supply unit 2
Is configured such that the supply unit 22 is placed on the moving table 21 and the feed screw 23 is driven by a motor (not shown).
Is rotated, the supply unit 22 is slid laterally and the desired electronic component is positioned at the take-up position P. The supply unit 22 is configured by arranging a plurality of cassettes 221 formed by winding electronic component encapsulating tape around reels. In addition, the mount section 3 is an XY table.
31, 32, on which the substrate 6 is positioned. The rotary head 1 rotates in the counterclockwise direction N at a pitch, and at the take-up position P, the mounting head 4 is moved up and down to take up electronic components, and the electronic components are transferred to the mount portion 3 and mounted on the substrate 6. During the process, the recognizing device 5 detects the positional deviation of the electronic components in the XYθ directions, corrects the positional deviation, and mounts it on the substrate 6.

FIG. 2 is a side view of the recognizing device 5. The recognizing device 5 includes a support frame 51 on which an X-direction sliding body 52 and a Y-direction sliding body 53 are slidably arranged in the XY directions. XY movement device 50 and a camera attached to the bottom of the X-direction sliding body 52
Made of 54. 55 is a mounting plate. The lens barrel 541 of the camera 54 extends below the mounting head 4 suspended from the rotary head 1 and recognizes the electronic component C mounted on the lower end of the mounting head 4 from below. 542 is a lens barrel portion 541
It is a reflecting mirror provided in. Reference numeral 7 denotes a motor disposed in the rotary head 1, which corrects the mounting head 4 in the θ direction via the belt 8 based on the recognition result of the camera 54. In addition, in each drawing, since the drawings are complicated, members unnecessary for explanation are omitted as appropriate.

As shown in FIG. 3, electronic components of this kind have various sizes and shapes, and electronic components having leads L sparsely in two directions.
There are Cn-1 and some electronic components Cn having leads L densely in four directions. Next, the recognition work of such various electronic components will be described with reference to FIG.

In the case of relatively small electronic components C1 to C3, these are completely within the field of view A of the camera 54 as shown in FIG. You can The displacement in the XYθ directions is performed by comparing with the master. Further, in the case of a relatively large electronic component such as the electronic component Cn-1, the whole cannot be included in the visual field A. Therefore, in this case, by driving the XY moving device 50 and sliding the camera 54 in the XY direction, the corner portion of the electronic component Cn-1 is brought into the visual field A (see FIG. 2B), By detecting the positional deviation between the vertical and horizontal sides a and b which are orthogonal to each other, the positional deviation of the electronic component Cn-1 is detected. The recognition work may be performed only on one corner of the electronic component, but it is better to perform the recognition work on four corners as much as possible by driving the XY moving device 50 to move the camera 54. Although it takes a long time to perform, it is possible to more accurately detect the positional deviation of the electronic component and improve the mounting accuracy. Further, as shown in FIG. 6C, in the case of an electronic component Cn having leads L in four directions, the corners of the leads L may be included in the visual field A for recognition.
Further, since an electronic component having leads in four directions generally requires high mounting accuracy, it is possible to increase the mounting accuracy by recognizing as many as eight corners. Further, although the magnification of the camera 54 of the above embodiment, that is, the size of the field of view is constant, it goes without saying that the magnification may be changed.

(Effects of the Invention) As described above, in the present invention, in this type of rotary head type electronic component mounting apparatus, the camera for recognizing the electronic component is mounted on the XY moving device, and the XY moving device is driven, In the case of a relatively small electronic component, the camera detects at least one corner of the electronic component that is mounted on the mounting head and is transferred from the supply unit to the mount unit. Can detect the positional deviation by putting the whole in the field of view, and in the case of a relatively large electronic component, drive the XY movement device to bring the corner of the electronic component into the field of view of the camera. Since the positional deviation can be detected with high accuracy, it is possible to detect the positional deviation of electronic components of various sizes with high accuracy and improve the mounting accuracy.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a plan view of a mounting device for rotary electronic components, FIG. 2 is a side view of a recognition device, and FIG. 3 is a plan view of large and small electronic components. 4 (a), (b), and (c) are plan views during recognition, and FIGS. 5 and 6 are plan views and view plan views of a conventional device. 1 …… Rotary head 2 …… Supply part 3 …… Mounting part 4 …… Mounting head 5 …… Recognition device 50 …… Movement mounting 52 …… X direction sliding body 53 …… Y direction sliding body 54 …… Camera C1〜 Cn ... electronic components

Claims (1)

[Scope of utility model registration request] 1. An electronic component supply unit and a mount unit are disposed below a rotary head having an electronic component mounting head, and an electronic component recognition camera is disposed between the supply unit and the mount unit. The electronic component is mounted on the mounting head in the supply unit, and while the rotary head is being rotated, the positional deviation of the electronic component is recognized by the camera and the position is corrected, and then the electronic component is mounted. In a mounting device for electronic components that is mounted on a board positioned in a part, by mounting the camera on an XY moving device and driving the XY moving device, at least one corner of the electronic component is mounted. An electronic component mounting apparatus, characterized in that it is recognized by the camera and the positional deviation thereof is detected.