JPS6232692A - Part positioning - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a component positioning method for mounting ICs for surface mounting called "FPP, PLCC, LC".

(Prior Art and Problems) Conventionally, methods shown in FIGS. 4 to 7 have been proposed as methods for positioning surface-mounted ICs.

The method shown in Fig. Pt54 is to mount the package 4 of the surface-mounted IC 3 on the printed circuit board 6 while holding and positioning it from four directions by the claws 2 provided coaxially with the suction bottle 1. In this case, the dimension of the surface-mounted IC 3 is accurately defined at the tip of the lead 5, and if the package 4 is positioned, the positional accuracy of the lead tip will deteriorate.

Another drawback is that the mechanism on the suction pin side is complicated and heavy.

The method shown in FIG.
The lead 5 portion of the IC 3 for top surface mounting is held and positioned from four directions while being mounted on the printed circuit board 6. In this case, force is applied to the leads 5 and the leads 5 tend to bend, making positioning difficult. Also, +1 on the suction bottle side! The structure becomes complicated and heavy. .

In the method shown in FIG. 6, a jig 8 having a concave recess 7 matching the shape of the surface-mounted IC is prepared, and the surface-mounted IC is placed in the jig 8 for positioning.

This method requires as many jigs as the number of jigs that correspond to the types of surface-mounted ICs, and they must be replaced each time the type of surface-mounted ICL differs. Furthermore, a gap is required between the surface-mounted IC and the jig in order to take the surface-mounted IC in and out, which impairs positioning accuracy.

The method shown in Fig. PtS7 consists of the parts support bin 9 facing coaxially with the suction bin, and the fourth claw 101 provided thereon.
As in the case shown in the figure, the package or lead portion of the surface-mounted IC is held and positioned from four directions. In this case as well, the dimensions of a surface-mounted IC are accurately defined at the tip of the lead, and positioning the package will degrade the positioning accuracy of the tip, while holding the lead tip i will cause the lead to In view of the above points, the present invention provides a surface-mounted IC whose leads protrude outside the package. The purpose of the present invention is to provide a component positioning method that enables accurate positioning of parts, etc., without bending the leads.

In the present invention, a positioning member having at least two orthogonal surfaces is provided with a movable component mounting table on which a component is placed, and the component mounting table has a velocity component directed toward one of the two surfaces and a velocity component directed toward the other surface. Place the component on the component mounting table while moving in a direction that includes both velocity components toward .
The above-mentioned conventional problems are solved by (2) taking out the part when the part comes into contact with the two surfaces and is in a positioning state due to the movement of the part @ placement table.

(Example) Hereinafter, an example of the component positioning method according to the present invention will be described with reference to the drawings.

In FIGS. 1 to 3, reference numeral 11 denotes a positioning member, which is supported and fixed horizontally by a support block 12. As shown in FIG.

The positioning member 11 has two vertical reference planes 13A and 13B, and the reference planes 13A and 13B are orthogonal to each other.

On the other hand, a component mounting table 15 is fixed on the stay 16 in close contact with the lower surface of the positioning member 11 and movable within a horizontal plane.
The slider 16 is reciprocated by an air cylinder 18 fixed to a support block 17, for example. and,
The direction of the reciprocating motion is the diagonal direction (arrow P in Figure 1) when considering a rectangle with two sides on the orthogonal vertical reference plane.
).

Such a configuration for positioning is disposed, for example, as a positioner between an electronic component supply section and a transformer 77 section that supports a printed circuit board in an electronic component mounting machine.

Now, the positioning of the parts is done by arrow P1 in Figures 2 and 3.
As shown, the component mounting table 15 is vertical reference plane 13A,
'13B direction (direction that includes both velocity components toward reference plane 1.3A and velocity components towards reference plane 13B)
Do this while you are moving to. First, as shown in FIG. 2, the surface-mount IC 3 is placed on the component mounting table 15, which is moving in the P1 direction, using a suction bottle or the like. Then, due to the movement of the component mounting table 15, the tip of the surface mounting IC 3 beam 5 is moved to the positioning member 1.
The state shown in FIG. 3 in which the device contacts each of the reference surfaces 13A and 13B of No. 1, that is, the positioning state is reached. At this time, parts?
22 Since the movement of the surface 15 in the P1 direction continues, the positioning state between the surface mounting IC 3 and the reference surfaces 13A and 13B is maintained due to the friction between the component mounting table 15 and the surface mounting IC 3. At this time, the surface mounting I
Hold the center position of the CU and take it out in the vertical direction. That is, since the external dimensions (dimensions up to the outer circumference of the leads) of the surface-mounted IC 3 are known, for example, the reference surface 13A can be set using a program.
, 13B, and move the suction bottle or the like to the center of the surface-mounted IC.

Note that it is generally most efficient to move the component mounting table 15 in a direction in which the velocity component toward one of the vertical reference planes 13A, 13B is equal to the velocity component toward the other surface. It is considered to be a target.

Further, the component mounting table 15 may be driven by a combination of a pulse motor and a cam mechanism, etc. instead of the air cylinder.

Further, the positioning member may have a square hole, and two orthogonal faces of the square hole may be set as reference planes.

(Effects of the Invention) As explained above, according to the component positioning method of the present invention, the following effects can be obtained.

(1) Square electronic components, especially FPP and PLCC.

Suitable for positioning when installing surface-mounted ICs called LCCs, PPP with leads protruding from the package.
has a large effect on

(2) In surface-mounted ICs, the dimensional accuracy of the outer periphery of the lead is controlled, and since the tip of this lead is positioned, high-precision positioning is possible in principle.

(3) Since the parts on the parts mounting table are moved by frictional force,
Positioning can be done without applying excessive force to the lead. Therefore, the leads will not be bent due to positioning.

(4) The parts can be easily applied to the two reference surfaces of the positioning member, and the positioning accuracy can be improved.

(5) It is possible to easily and smoothly set a component on the positioning member and take out the positioned component again.

(6) Even if the external dimensions of the parts differ, it can be handled without replacing the positioning member. That is, since the external dimensions of the part are known, for example, a suction bottle or the like can be brought to the center of the part using a program.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the component positioning method according to the present invention, FIGS. 2 and 3 are plan views showing the operation of the embodiment, and FIGS. 4 and 5 are respectively conventional methods for positioning parts. Front cross section showing the method, P! FIG. S6 and FIG. 7 are perspective views showing other conventional examples, respectively. 3...ICl3...Lead for surface mounting, 11...Positioning member, 13A, 13B...Vertical reference plane, 15...
・Parts mounting table.

Claims (2)

[Claims] (1) A component mounting table for placing a component is movably provided on a positioning member having at least two perpendicular surfaces, and the component mounting table has a velocity component directed toward one of the two surfaces and a velocity component directed toward the other surface. When the component is placed on the component mounting table while the component is moving in a direction that includes both of the velocity components toward which the component is moving, and the component is in a positioning state by contacting the two surfaces due to the movement of the component mounting table, the component is placed in the positioning state. A part positioning method characterized by taking out a part. (2) The component positioning method according to claim 1, wherein the component mounting table moves in a direction in which a velocity component toward one of the two surfaces is equal to a velocity component toward the other surface.