JPH02311231A - Automatic parts mounting device - Google Patents

Abstract

PURPOSE:To mount a part at a proper load corresponding to the part by displacing a receiving member to an arm body by a movable means under automatic control, disposing it at a predetermined position corresponding to the part to be mounted, and setting an initial load by a resilient body. CONSTITUTION:The sort of a part 7 to be mounted is designated by a mount instruction means 10, and a receiving member 5 is moved along the expanding direction of a resilient body 6 by a screw rod 9a of a movable means 9 through a control means 11 based on a computer program. The receiving member 5 is disposed at a position to produce an initial load corresponding to the optimum mounting load for the designated part 7 at the resilient body 6. An arm body 1 is moved forward toward a base body 8, and the part 7 is pushed to the base body 8 by the optimum pressure load by flexture of the resilient body 6 to eliminate incomplete mounting of the part 7 by improper pressure load, thereby a stable and good mounting result can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic component mounting device for mounting, for example, a flat package IC onto an electronic circuit board, and particularly to a component mounting load adjustment mechanism thereof.

[Conventional technology]

FIG. 3 is a diagram showing a mounting head portion of a conventional automatic component mounting device similar to that shown in, for example, Japanese Patent Application Laid-Open No. 63-143900.

In the figure, (1) is an arm that moves up and down in Figure 3.

(2) is an actuating body that is provided on the arm body (1) so as to be movable up and down via a linear motion bearing (3), and has a large diameter portion (2a) formed at the upper end to be supported by the arm body (1); (2b) is the actuating body (2
), the suction nozzle (4) is formed at the lower end of the actuating body (2
) is connected to the upper end of the suction nozzle (2b), and the vacuum pipe (5) is connected to the suction passage which communicates with the suction nozzle (2b). body (1)
The receiver (6) fixed to the lower surface is fitted into the actuating body (2), the upper end is connected to the receiver (5), and the lower end is connected to the suction head (2b).
) is an elastic body made of a compression coil spring supported by the flange part, (7) is a component made of a flat pan cage IC held by a suction head (2b), and (8) is placed on a transport device (not shown). This is a base body made of a printed circuit board which is temporarily held below the arm body (1).

The conventional automatic component mounting device is constructed as described above.2 For example, a suitable component (7) is held by a suction head (2b), and the component (7) is placed at a predetermined position on the surface of a base (8) facing each other. The arm body (1) is moved forward toward the base body (8). Then, as the arm body (1) moves forward, the part (7) becomes the elastic body (6).
It is pressed against the base body (8) by the suppressing load caused by the bending of the base body (8).

[Problem to be solved by the invention]

In the conventional parts automatic mounting device as described above, the arm body (1)
Since the forward stroke of the component (7) is normally set to a constant value, the mounting load of the component (7) is also constant.

However, the component (7) to be mounted, ie, for example, a flat package IC, has various types of lead shapes and numbers, and a corresponding appropriate mounting load is required. Therefore, there was a problem that the mounting would be incomplete if the mounting load was constant. For example, if a flat package IC is pressed against a printed circuit board after solder cream printing with an excessive mounting load, the solder will overflow and a solder bridge will occur.

This invention has been made in order to solve the above problem, and aims to obtain an automatic parts mounting device that can set a predetermined mounting load according to the parts (7) to be mounted and can be mounted satisfactorily. .

[Means to solve the problem]

ζ in the parts automatic mounting device according to the present invention.

As the arm body (1) moves forward, it bends and moves the part (7) to the base body (8
) to support the arm (1) side of the elastic body (6),
A receiver is provided which is moved relative to the arm (1) by a moving device. Also provided is a control device that controls the moving device to displace the receiver to a predetermined position.

[For production]

In the parts automatic mounting device configured as above,
The mobile device is energized via the control device.

The receiver is placed at a predetermined position depending on the part to be mounted, and the initial load of the elastic body (6) is set.

〔Example〕

1 and 2 are diagrams showing an embodiment of the present invention, and in FIG. 2, the same reference numerals as in FIG. 3 indicate corresponding parts.

(5) is movably fitted to the actuating body (2) and the elastic body (
(6) a receiver supporting the arm body (1) side; (5a) a guide rod protruding from the arm body (5) and vertically supported by the arm body (1);

(9) is a moving device provided on the arm body (1), (9a
) is the tension rod of the moving device (9) which is pivotally supported by the arm body (1) and screwed into the receiver (5), and (9b) is the electric motor attached to the arm body (1).

(9C) is a transmission mechanism consisting of a timing belt and a toothed pulley that transmits the movement of the electric motor (9b) to the tension rod (9a); FIG. 2 is a diagram conceptually showing the electrical connection in FIG. 1;
α0) is a mounting command means including a program for operating the automatic component mounting device, θ1) is a control device, (b) is a computer in the control device (11), and CPU (+3)
, RAM (14), and ROM (1!;) are provided. (1 et al.) are I10 ports) and (+?) are control means for the mobile device (9).

In the automatic component mounting device configured as described above, the type of component (7) to be mounted is specified by the mounting command means α0) and the mounting operation is commanded. Then, the control means (I) is controlled by the computer (program).
? ) the moving device (9) is energized. As a result, the threaded rod (9a) moves and the receiver (5) moves to the elastic body (6).
move along the direction of expansion and contraction. Then, the receiver (5) is placed at a position that causes the elastic body (6) to generate an initial load corresponding to the optimum mounting load of the specified part (7). Then, the arm body (1) moves forward toward the base body (8).

The component (7) is pressed against the base body (8) by the optimum pressing load due to the bending of the elastic body (6) and mounted. Therefore, incomplete mounting due to excessive or insufficient suppressing load of the component (7) is eliminated, and a stable and good mounting result can be obtained.

〔Effect of the invention〕

As explained above, in this invention, the arm moves forward and the elastic receiver that presses the part is moved to generate an initial load depending on the part to be attached, and the two parts correspond to this. It is mounted by being pressed against the base by a predetermined suppressing load.

Therefore, there is an effect of eliminating incomplete mounting due to excess or deficiency of pressing load between the two parts.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the automatic component mounting device according to the present invention, and includes a longitudinal sectional view of the tip of the arm body, a conceptual control configuration diagram,
FIG. 2 is a conceptual circuit diagram without showing the electrical connections in FIG. 1, and FIG. 3 is a vertical cross-sectional view of the distal end of the arm body showing a conventional automatic component mounting device. (1) arm body, (2) operating body, (5) receiver, (6) elastic body, (7) parts, (8) base body, (9) moving device, (1
1) Control device. In addition, the same parts or corresponding parts in the two figures are indicated by the same reference numerals.

Claims (1)

[Claims] An arm body that moves forward and backward with respect to the base body, and an arm body that is movably provided on this arm body and is normally placed in a predetermined protruding position, holds a component at the tip, and moves the above-mentioned component onto the base body by moving the arm body forward. an actuating body that performs a pressing action; an elastic body that has one end supported by a receiver that is displaceably provided with respect to the arm body and whose other end is supported by the actuating body to urge the actuating body in a projecting direction; A moving device provided on the arm body to move the receiver in the direction of expansion and contraction of the elastic body, and a control device that biases the moving device to displace the receiver to a predetermined position according to the part. automatic parts mounting device.