JP2575580Y2 - Circuit board support device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit board supporting apparatus used in a circuit board manufacturing process, and more particularly, to a non-contact type circuit board supporting apparatus which is held at an edge of the circuit board so as not to contact the lower surface of the circuit board. Related to the device.

[0002]

2. Description of the Related Art In a circuit board manufacturing process, a circuit board is placed on an inspection table, for example, when an inspection is performed by image processing, and alignment is performed without damaging a circuit forming surface of a main surface. It is necessary to fix the circuit board in parallel so that it does not float. This is because, when the circuit board is lifted on the table, the focus position of the optical system of the inspection apparatus is shifted, and the detected image on the surface of the circuit board is distorted, so that accurate inspection cannot be performed. by the way,
Conventionally, in such an inspection table, for example, a suction hole is formed on the table surface, and a circuit board arranged on the table upper surface is suctioned and fixed while the suction hole is under a negative pressure. Further, such a circuit board supporting device can be applied only to fixing a circuit board having a circuit pattern printed on only one surface because of its structure.

However, with the recent increase in the density of electronic circuits, so-called double-sided printed boards, in which circuit patterns are printed not only on one side but also on both sides, have come to be used. About this double-sided printed circuit board, without touching the circuit formation part of the lower main surface,
The question was how to support it.

In order to solve the problems of the prior art,
2. Description of the Related Art There is known a circuit board supporting apparatus that holds a two-sided printed circuit board by using both end edges on both sides of a portion where a circuit pattern is formed, and supports the circuit pattern formed on both sides thereof without contacting the circuit pattern. For example, as shown in FIG. 3, parallel support surfaces 2, 2,... Protruding from both ends of the table 1 are formed, and vacuum suction holes 3, 3,. I have.
Then, the dead space of the double-sided printed circuit board is placed on the support surface of the table 1 and is suction-fixed by vacuum. Also, as another circuit board support device,
Those shown in FIGS. 4 and 5 are also used. In this apparatus, parallel support surfaces 2, 2 protruding from both ends of a table 1 are formed, and abutment plates 4, 4 and a chuck are provided on the main surface of the table 1 and the support surfaces 2, 2, respectively. Plates 5 and 5 are provided. The tip surfaces of the abutment plate 4 and the chuck plate 5 are inclined, and the lower surface both sides are supported and fixed on the support surfaces 2 and 2 while moving the chuck plates 5 and 5 and pressing the double-sided printed board downward. .

[0005]

However, in the former circuit board supporting device shown in FIG. 3 among the above prior arts, the diameter of the vacuum suction holes 3, 3,... Lack of power requires a large vacuum source for adsorption. Further, there is a problem that the vacuum suction holes 3, 3,. On the other hand, the latter prior art shown in FIGS. 4 and 5 has a problem that the abutment plate and the chuck plate easily damage the edge portion of the substrate.

In view of the above-mentioned problems of the prior art, the present invention utilizes a double-sided printed circuit board having both sides formed with a circuit pattern on both sides without a circuit pattern to form a circuit formed on the lower side of the board. Without touching the surface and damaging it
It is an object of the present invention to provide a circuit board supporting device capable of securely holding and supporting a board stably without being lifted.

[0007]

In order to achieve the above object, the circuit board supporting device proposed by the present invention does not contact the circuit forming portion on the lower surface of the circuit board, and the same at the lower edge on both sides thereof. A circuit board supporting device for supporting a circuit board, wherein only a pair of opposing edges on both sides of a lower surface of the circuit board are provided.
A table having a horizontal support surface that abuts and supports the circuit board ; a main surface between the support surfaces of the table;
Air between other parts of the lower surface of the circuit board except for both sides
Forming a gap to be a passage, and the circuit board facing the gap;
An airflow generating means for forming an airflow flowing along the lower surface of the plate is provided.

[0008]

SUMMARY OF] According to the circuit board supporting device of the present invention, by forming the air flow along the lower surface of the circuit board which is supported away from the main surface of the table, theorem called Berunu <br/> Lee As a result, the pressure on the lower side of the circuit board becomes lower than the atmospheric pressure, and a pressure difference from the atmospheric pressure is generated. Therefore, while the circuit board is pressed downward by the generated differential pressure ,
Both edges are supported on the support surface of the table, and the circuit board can be stably held so that the circuit board does not float. In particular, in the circuit board supporting device of the present invention, the circuit board
Only a pair of opposing edges on both sides of the lower surface of the table support the table.
Supported on the main surface of the table and the lower surface of the circuit board.
A gap that forms an air passage is formed between other parts except the side
The lower surface of the circuit board facing this gap.
Therefore, it is possible to easily form an airflow flowing. This
As a result, the main surface of the lower surface such as the circuit forming surface of the circuit board
While keeping the part in non-contact with the table,
It can be stably held.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a circuit board supporting device according to an embodiment of the present invention.
For example, it is used as an inspection table of an inspection device for inspecting a circuit pattern formed on the surface of the circuit board 100 by image processing.

The circuit board supporting apparatus comprises a table 10 for holding a circuit board 100 to be inspected thereon, and butting rollers 20, 20... For positioning the held circuit board 100. Clamping device 3
0 and 30.

First, a table 10 for holding a circuit board 100 is mounted on a base 40 of an inspection table, and a horizontal main surface 1 extending in a rectangular shape over the entire surface thereof.
1, and has supporting surfaces 12 and 12 extending horizontally at positions slightly above the main surface 11 on both sides thereof. Notches 13, 13 ′, and 13 ″ are formed on three sides of the table 10, respectively.
Rollers 32, 32 attached to the tips of the moving cylinders 31, 31 of the clamp devices 30, 30 and moving in the direction of the arrow are arranged at 3 '. Furthermore, two butting rollers 20, 20 are provided on the side of the table 10 where the other cutout 13 "is formed, and one butting roller 20 is provided near the other side of the table 10. ing.

In the present invention, the main surface 11 of the table 10 is used.
A through hole 15 is formed at the center of the through hole 1.
5 is connected to an airflow generating means described later. Also, in this figure, the circuit board 100 is indicated by a broken line, and the circuit board 100 has a lower surface edge portion in a state where the lower circuit forming surface is opposed to the main surface of the table 10 without contacting the main surface. Are supported in contact with the surfaces of the support surfaces 12, 12.

Next, the operation of the circuit board supporting device will be described. First, the circuit board 100 placed on the inspection table is opposed by moving the rollers 32, 32 attached to the tips of the moving cylinders 31, 31 of the clamping devices 30, 30 and moving in the arrow direction in the arrow direction. Are positioned between the abutting rollers 20, 20...

FIG. 2 shows the circuit board 100 positioned, and the lower edge of the circuit board 100 is placed on the surfaces of the support surfaces 12 and 12. And
According to the present invention, in this state, the air guided from the air supply source 50 connected to the through hole 15 formed in the central portion of the main surface 11 of the table 10 is sent out. As a result, the sent air flows in the space formed between the circuit forming surface of the lower main surface of the circuit board 100 and the main surface 11 of the table 10, as indicated by arrows in the drawing.

When this air flows through the space between the circuit forming surface of the circuit board 100 and the main surface 11 of the table 10, the pressure below the circuit board 100 is reduced by the so-called Bernoulli's theorem, and the atmospheric pressure is reduced. And a pressure difference is generated. The pressure difference generates a force for pressing the circuit board 100 downward (broken arrow in the figure).
Are pressed onto the support surfaces 12, 12,... Of the table 10 to stably support the table 10 so as not to float.

In the above embodiment, the table 10
As the air flow generating means connected to the through hole 15 formed in the central portion of the main surface 11, the air supply source 50 constituted by, for example, a pump has been described. Can also be used. Further, a vacuum mechanism constituted by a vacuum pump or the like may be connected to the through hole 15 of the main surface 11 of the table 10, and in this case, a space between the circuit forming surface of the circuit board 100 and the main surface 11 of the table 10 may be provided. The direction of the flow of the air flowing through the space is opposite to the arrow in the figure. Further, the air can be sent from the side of the circuit board 100 to the lower side of the circuit board 100 to form a flow of air below the circuit board 100. In this case, air is supplied horizontally only from the blower to the lower side of the circuit board 100 as an air supply source.

Also in these cases, the pressure under the circuit board 100 is reduced by the Bernoulli's theorem, and a pressure difference from the atmospheric pressure is generated.
It is the same to support the table 10 stably on the support surfaces 12, 12... So as not to float.

As for the through hole 15 formed at the center of the main surface 11 of the table 10, not only the through hole having a circular cross section is formed vertically upward as in the above embodiment, but also It is also possible to form a rectangular or polygonal cross section, or to be formed to be inclined with respect to the main surface 11.

In the circuit board supporting apparatus of this embodiment, the circuit board 100 can be stably supported by a relatively simple structure so as not to float while supporting the dead space at the lower edge of the circuit board. At the same time, the maintenance is simple and easy, and the obtained pressing force is sufficient and stable. Further, according to the system utilizing the differential pressure according to Bernoulli's theorem, the problems of breakage of the circuit board 100, abutment, and wear of the chuck plate as in the above-described prior art can be solved.

In the following, a specific example of the circuit board supporting device of this embodiment will be described. The distance between the main surface 11 and the supporting surface 12 of the table 10 is 1.0 mm, and
Is 10.0 mm, and the diameter of an air supply path connected from the air supply source 50 to the through hole 15 is at least 3.
0 mm. Air (4 to 6)
kg / cm ² ) from the through hole 15 to the gap between the main surface 11 of the table 10 and the circuit board 10,
A suction force of about 10-30 gram weight was obtained.

In the above embodiment, a so-called double-sided printed circuit board having a circuit pattern printed on both sides is exemplified as a circuit board to be supported. However, the present invention is not limited to a double-sided printed circuit board having circuit patterns formed on both sides. Obviously, it can also be used to support a single-sided printed circuit board.

[0021]

As is clear from the above detailed description of the present invention, according to the circuit board supporting device of the present invention, an airflow is formed below the circuit board and a differential pressure is generated by Bernoulli's theorem. The circuit board is fixed and supported by pressing it on the support surface of the table, so that the circuit board can be stably supported with sufficient pressing force without lifting, and there is no fear of damage to the board and its maintenance is easy. is there.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a circuit board supporting device according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view illustrating a substrate support principle of the circuit board support device.

FIG. 3 is a perspective view showing an example of a conventional circuit board supporting device.

FIG. 4 is a perspective view showing another example of a conventional circuit board support device.

5 is a sectional view of the circuit board supporting device shown in FIG. 4 taken along the line AA.

[Explanation of symbols]

 Reference Signs List 10 Table 11 Main surface 12 Support surface 15 Through hole 100 Circuit board

Claims (1)

(57) [Scope of request for utility model registration] 1. A circuit board supporting device for supporting a circuit board at lower edge portions on both sides thereof without contacting a circuit forming portion on a lower face of the circuit board , comprising a pair of pairs on both sides of a lower face of the circuit board .
Has a table with a horizontal support surface for supporting the contact with the circuit board only at the edge of direction, the support surface of the table
The main surface between the other, except for both sides of the lower surface of the circuit board
A gap that serves as an air passage is formed between
An apparatus for supporting a circuit board, comprising: an airflow generating means for forming an airflow flowing along a lower surface of the circuit board facing the circuit board .