JPH0529798A - Positioning of article mounting apparatus - Google Patents

Abstract

PURPOSE:To accurately and rapidly mount an article in a predetermined position on an apparatus by putting an article origin mark such that contact portion of four metal squares are arranged into a square shape at slight intervals, and connecting a capacitance meter between a measuring unit and electrodes. CONSTITUTION:There is mounted on an electrode 5 an article origin mark 4 where contact portions 4a-4d of four metal squares are arranged into a square shape at slight intervals. The article origin mark 4 is adjusted at the centers thereof to substantially coincide the tip end of a measuring unit 3, observing the mark 4 with a naked eye using microscope. Then, the article position is finely adjusted, reading a capacitance meter 6 connected between a measuring unit 3 and the electrode 5. When the article is correctly mounted in a predetermined location on the apparatus, the tip end of the measuring unit 3 makes contact with all contact parts 4a-4d and hence the capacitance meter 6 reads maximum capacitance (reference capacitance). Thus, the article is accurately and rapidly mounted at the predetermined location of the apparatus.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an article mounting apparatus such as an IC mounting apparatus for mounting an IC on a printed circuit board so that a product such as a printed circuit board is correctly mounted at a predetermined position of the article mounting apparatus. The alignment method of.

[0002]

2. Description of the Related Art FIG. 4 is a schematic view showing an example of a conventional product origin mark used in a conventional alignment method of an article mounting apparatus and a probe of an article mounting apparatus. FIG. It is a perspective view which shows the state which is aligning.

In an article mounting apparatus such as an IC mounting apparatus for mounting an IC on a printed circuit board, a conventional alignment method for correctly mounting a product (printed circuit board) on the apparatus (IC mounting apparatus) is known. As shown in FIG. 4, the product side is provided with a “ten” -shaped product origin mark 14, while the device side is provided with a needle-shaped probe 13, and as shown in FIG. This is performed by aligning the center of the product origin mark 14 with the tip of the probe 13 while looking through with the naked eye 1.

[0004]

As described above, the conventional alignment method in the article mounting apparatus is a method in which the tip of the probe and the center of the product origin mark are aligned with the naked eye using a microscope. The accuracy of alignment depends on the sense of the operator, and the speed of the operation depends on the skill of the operator.

[0005]

According to a method of aligning an article mounting apparatus of the present invention, a product origin mark is provided on the product side, a needle-shaped measuring element is provided on the apparatus side, and the product origin mark is made of metal. 4 square contact portions are arranged in a square shape with a slight gap between them, and the diameter of the tip portion of the probe is made larger than the gap between the contact portions, and the product origin mark Is mounted on an electrode, a capacitance meter is connected between the probe and the electrode, the probe is brought into contact with the product origin mark, and the capacitance is measured by the capacitance meter. Aligning the product with the device is included.

[0006]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a schematic view showing an embodiment of the present invention, FIG. 2 is a perspective view showing a state where the origin of a product is aligned by the embodiment of FIG. 1, and FIG. 3 is an embodiment of FIG. FIG. 6 is a plan view showing a contact state between a product origin mark used in the above and a probe of the apparatus.

In this embodiment, the product origin mark 4 made of metal is used as the product origin mark. As shown in FIG. 1, the product origin mark 4 is mounted on the electrode 5 and comes into contact with the product origin mark 4. A capacitance meter 6 is connected between the probe 3 and the electrode 5, and the capacitance is measured by the capacitance meter 6 to align the product with the device.

The product origin mark 4 is, as shown in FIG.
The four square contact portions 4a to 4d made of metal are arranged in a square shape with a slight gap between them, and these are provided at predetermined positions of the product to be mounted on the apparatus. On the other hand, the diameter of the tip of the probe 3 is larger than the gap between the contact portions 4a to 4d. Since the product is not properly mounted on the device, the tip of the probe 3 is in contact with only the contact part 4a and the other contact part 4b as shown in FIG. 3 (a).
4d to 4d, or the tip of the probe 3 is in contact with only the contact portions 4a and 4b and is not in contact with the other contact portions 4c to 4d as shown in FIG. 3 (b). The capacitance at this time is smaller than the capacitance when the tip of the probe 3 is in contact with all of the contact portions 4a to 4d as shown in FIG. This embodiment utilizes this principle to align the product and the device.

That is, as shown in FIG. 2, the product origin mark 4 of the product is mounted on the electrode 5. First, while looking through the microscope 2 with the naked eye 1, the product origin mark 4 is attached to the tip of the probe 3.
Align so that the centers of are almost the same. Next, probe 3
While observing the capacitance meter 6 connected between the electrode 5 and the electrode 5, the position of the product is finely adjusted. When the product is properly mounted at a predetermined position of the device, the tip of the probe 3 comes into contact with all the contact parts 4a to 4d as shown in FIG. Indicates the maximum capacitance. When the product is not properly mounted in the predetermined position of the device, as shown in FIG. 3 (a) and FIG. 3 (b), the tip of the probe 3 contacts only a part of the contact parts 4 a to 4 d. Therefore, the capacitance meter 6 shows a value smaller than the maximum capacitance (reference capacitance). In the case of FIG. 3A, the reference capacity is 25
%, 50% of the reference capacity is shown in the case of FIG. In this way, by setting the value indicated by the capacitance meter 6 to be the reference capacitance, the product can be mounted accurately and quickly at a predetermined position of the device.

[0011]

As described above, according to the method of aligning the article mounting apparatus of the present invention, the product origin mark is provided on the product side, the needle-shaped probe is provided on the apparatus side, and the product origin mark is made of metal. It is assumed that four square contact parts made of metal are arranged in a square shape with a small gap between them, and the diameter of the tip of the probe is made larger than the gap between the contact parts, and the product origin mark is Mounted on top, connect a capacitance meter between the probe and the electrode, bring the probe into contact with the product origin mark, and measure the capacitance with the capacitance meter to align the product with the device. By doing so, there is an effect that the product can be mounted accurately and quickly at a predetermined position of the device.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing a state in which the origin of the product is aligned according to the embodiment of FIG.

FIG. 3 is a plan view showing a contact state between a product origin mark used in the embodiment of FIG. 1 and a probe of the apparatus.

FIG. 4 is a schematic view showing an example of a conventional product origin mark used in a conventional alignment method of an article mounting apparatus and a probe of the article mounting apparatus.

FIG. 5 is a perspective view showing a state in which the products are aligned according to the example of FIG.

[Explanation of symbols]

 1 Visual eye 2 Microscope 3 Measuring element 4 Product origin mark 4a-4d Contact part 5 Electrode 6 Capacitance meter 13 Measuring element 14 Product origin mark

Claims (1)

Claims: 1. A product origin mark is provided on the product side, a needle-shaped measuring element is provided on the device side, and the product origin mark is configured such that four metal square contact portions are mutually connected. It is assumed that they are arranged in a rectangular shape with a slight gap between them, the diameter of the tip portion of the probe is made larger than the gap between the contact portions, and the product origin mark is mounted on the electrode, and the measurement is performed. A capacitance meter is connected between the probe and the electrode, and the probe is brought into contact with the product origin mark to measure the capacitance with the capacitance meter to align the product with the device. A method for aligning an article mounting apparatus, which comprises performing.