JPH0582080B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a mounting head device for an electronic component mounting apparatus that is equipped with a shock absorbing mechanism to absorb shock when electronic components are mounted on a printed circuit board.

Conventional Structure and Its Problems In a conventional electronic component mounting apparatus, the specific structure of the mounting head is shown in FIG.

As shown, from the head drive to the shaft 1
When the lever 2 rotates counterclockwise due to the driving force transmitted through the lever 2, the roller 3 provided at the tip of the lever 2 pushes up the electronic component suction tweezers 5 via the connecting block 4, and the suction tweezers The electronic component 6 sucked to the lower end of the electronic component 5 is mounted on a printed circuit board 7.

However, with the above configuration, the speed at which the electronic components 6 are mounted on the printed circuit board 7 cannot be arbitrarily set because the speed at which the suction tweezers 5 descend is proportional to the speed of the head drive device. For this reason, there is a drawback that the electronic component 6 may be displaced from a predetermined position on the printed circuit board due to the impact generated when the electronic component 6 is mounted on the printed circuit board 7, and furthermore, the electronic component 6 itself may be broken.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention provides an electronic component mounting apparatus that eliminates problems such as misalignment and component cracking when mounting electronic components on a printed circuit board, and improves reliability and mounting quality. The purpose is to

Structure of the Invention The present invention provides a lever whose center is rotatably supported, the left end of the lever is configured to be able to move up and down vertically, and the right end is located at the top of a vertical shaft which is equipped with suction tweezers at the tip, and the right end is located on the inside of the right end. The bracket is connected to a cylinder A so that the vertical shaft can be moved up and down by the vertical movement of the cylinder A, and a shock absorber having an operating tip pin is attached to the bracket, and the lower end of the bracket is rotated by the mounting head bracket. The bracket and cylinder B are rotatably supported between the shaft support of the bracket and the shock absorber, a detection plate is fixed to the bracket, a detector mounting head bracket is fixed to the bracket, and electronic components are supplied. An electronic component is picked up by the suction tweezers from the positioning electronic component supply device, and when the suction tweezers reach a predetermined height above the printed circuit board, the cylinder B is actuated, the bracket is rotated to the left, and the detector detects the electronic component. The position of the plate is detected, the cylinder A is activated by the detection signal, the right end of the lever is pushed up, the right end of the lever is brought into contact with the operating terminal pin of the absorber, the descending speed of the suction tweezers is reduced, and the electronic parts are printed. It is characterized by being configured so that the descending speed is zero when attached to the board,
With the above configuration, the present invention eliminates problems such as misalignment of electronic components and cracking of components during electronic component mounting, and produces effects of high reliability and high mounting quality.

Description of examples Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 shows a side sectional view of the mounting head of the electronic component mounting apparatus of the present invention, and FIG. 3 shows a plan view of FIG. 2.

In FIGS. 2 and 3, 8 is a vertical shaft having a suction pin set 21 at the lower end, 9 is a lever that transmits vertical driving force to the vertical shaft, 10 is a fulcrum pin A of lever 9, and 11 is a vertical driving force that generates vertical driving force. The cylinders A and 12, which are the driving sources, are shock absorbers that absorb shock, and the pin 13 at the tip abuts against the lever 9. 14 is a stopper block, 15 is a bracket that supports the shock absorber, 16 is a detection plate, 17 is a detector, 18 is a fulcrum pin B, 19 is a cylinder B which is a driving source for the bracket 15, 20 is a mounting head bracket, 11A
is the rotation axis of cylinder A11 and lever 9, 15
A indicates the rotation axis of the bracket 15 and cylinder B19.

The operation of the mounting head and shock absorbing mechanism of the electronic component mounting apparatus of the present invention will be explained below.

First, the suction tweezers 21 supply electronic components,
Electronic component 22 from the electronic component supply device for positioning
When the bracket 15 is attracted to a predetermined position on the printed circuit board 23, the cylinder B19 operates from the initial position of the bracket 15, and the bracket 15 is moved to the fulcrum pin B.
Rotate around 18 and push to the left. bracket 15
The movement is detected by the detection plate 16 attached to the bracket 15.
is confirmed by being detected by the detector 17,
The detection signal causes the cylinder A11 to operate. The lever 9 is pushed up on the rotating shaft 11A by the cylinder A11 around the fulcrum pin A10. The right end of lever 9 is the shock absorber 1.
Cylinder A1 until it hits the tip pin 13 of 2.
The upper and lower shafts 8 and the suction tweezers 2 are set at a speed of 1.
1 is proportional to the speed, but when the right end of the lever 9 hits the tip pin 13, the speed of the suction tweezers 21 gradually decreases due to the action of the shock absorber 12, and the impact when mounting the electronic component 22 on the printed circuit board 23 is reduce the occurrence of When the lever 9 hits the stopper 14 provided at the tip of the shock absorber 12, the lever 9 and the upper and lower shafts 8 stop, so that the descending speed of the suction tweezers 21 becomes zero. By shifting the mounting position of the stopper 14, the height at which it contacts the lever 9 can be changed, and the position of the lowering limit of the suction tweezers 21 can be changed to accommodate changes in the thickness of the board and the height of the component. I can do it.

Effects of the Invention As described above, according to the embodiments of the present invention, an electronic component mounting apparatus is provided with a shock absorbing mechanism for reducing the descending speed of the mounting head from an arbitrary height above the printed circuit board. Since the descending speed when electronic components are mounted on the printed circuit board can be set to almost zero, the shock at the time of mounting can be extremely reduced. Since the impact can be reduced in this way, the force applied to the components is reduced, problems such as component cracking and misalignment are eliminated, and electronic components with high reliability and high mounting quality can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a mounting head device of a conventional electronic component practical equipment, FIG. 2 is a side sectional view of a mounting head device of an electronic component mounting device of the present invention, and FIG. 3 is a plan view of FIG. show. 8: Upper and lower shaft, 9: Lever, 10: Fulcrum pin A, 11: Cylinder A, 11A: Rotating shaft, 1
2: Shock absorber, 13: Shock absorber tip pin, 14: Stopper block, 1
5: bracket, 16: detection plate, 17: detector,
18: Fulcrum pin B, 19: Cylinder B, 20:
Mounting head bracket, 21: Suction tweezers,
22: Electronic components, 23: Printed circuit board.

Claims (1)

[Claims] 1. A lever is rotatably supported in the center, and the left end of the lever is attached to the upper part of a vertical shaft which is configured to move up and down vertically and has suction tweezers at the tip, and the right end is attached to the cylinder A on the inside from the right end.
A shock absorber having an operating tip pin is attached to the bracket, and the lower end of the bracket is rotatably attached to the mounting head bracket. the bracket and the cylinder B are rotatably supported between the shaft support of the bracket and the shock absorber, a detection plate is fixed to the bracket, a detector is fixed to the mounting head bracket, and electronic components are supplied;
An electronic component is picked up by the suction tweezers from the positioning electronic component supply device, and when the suction tweezers reach a predetermined height above the printed circuit board, the cylinder B is actuated, the bracket is rotated to the left, and the detector detects the electronic component. The position of the plate is detected, the cylinder A is activated by the detection signal, the right end of the lever is pushed up, the right end of the lever is brought into contact with the operating terminal pin of the absorber, the descending speed of the suction tweezers is reduced, and the electronic parts are printed. A mounting head device for an electronic component mounting system configured so that the descending speed is zero when mounting onto a board.