JPH0363000A - Centering device of electronic parts - Google Patents

Abstract

PURPOSE:To position chip-shaped electronic parts with a small stroke for preventing the chip-shaped electronic parts from being damaged by making the length of a shaft, which transmits drive, variable according to a driving unit. CONSTITUTION:An air cylinder 8 is fixed to a cam lever 5, which magnifyingly transmits a motion of a plate cam 6, at its one end. Further, the other one end of the air cylinder 8 is connected a lever 9 having a supporting point and performing a rocking motion. This lever 9 is connected to a shaft. At this time the air cylinder 8 plays a role of a gang shaft changing the length of the gang shaft by its on/off. Thereby, apart from the motion by the plate cam, an opened position of a positioning claw 1 can be changed in two stages. It follows that the air cylinder 8 changes an opened position of the positioning claw 1 so that the stroke required for centering is reduced by more than half. Thereby, damage to be given to the chip-shaped electronic parts can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electronic component centering device used in an apparatus for mounting chip-type electronic components onto a circuit board in an electronic circuit board assembly process.

(2) On the far left side of technology, the proportion of electronic circuits formed using chip-type electronic components is increasing. This has led to the development of automatic chip mounters for chip-type electronic components, and various types are now in use on the market.

Is this chip mounter chip type? The centering unit that positions E components plays an important role in improving the quality of electronic circuit boards.

Hereinafter, an example of the conventional centering device mentioned above will be explained with reference to the drawings.

FIG. 2 shows an example of a conventional centering device. Second
In the figure, reference numeral 1 denotes a claw that directly contacts and positions the chip-type electronic component. 2 is a centering unit that has the function of opening and closing the claws.

Reference numeral 3 denotes a lever, which swings and transmits the movement of the shaft 4 to the centering unit 2. A cam lever 6 magnifies the movement of the plate cam and transmits it to the shaft 4. 6 is a plate cam, which generates motion by rotation of the drive shaft 7.

This configuration positions the electronic components.

Problems to be Solved by the Invention However, with the above configuration, a large stroke of the claw is required to position the large chip-type electronic component in the small chip-type electronic component housing, and the large stroke of the claw is too large for the small chip-type electronic component. Kinetic energy is added and causes damage. Furthermore, with chip mounters whose mounting speeds are becoming increasingly faster, it becomes impossible to ensure a large stroke to accommodate large chip-shaped electronic components.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a centering device that enables a high-speed placement machine to position a chip-type electronic component with minimum force.

Means for Solving the Problems In order to achieve the above object, the present invention provides a centering unit having a pawl that directly contacts and positions a chip-type electronic component, a means for opening and closing the pawl, a plate cam serving as a driving source, , a drive unit that transmits the movement of this plate cam to a centering unit and switches the length of the shaft.

As described above, the present invention is capable of positioning a chip-type IE component with a small stroke by varying the length of the shaft that transmits the drive using the metal drive unit (cylinder). Damage to electronic components is reduced.Therefore, it is possible to use a high-speed mounting machine without deforming or destroying chip-type electronic components, thereby realizing high quality electronic circuit board formation. .

EMBODIMENTS Below, the drawings shown as embodiments of the present invention will be explained.

In FIG. 1, 1 to 7 are substantially the same as the configuration shown in the conventional example. 8 is an air cylinder, one end of which is attached to the cam lever 6 that magnifies and transmits the movement of the plate cam 6. The other end of the air cylinder 8 is connected to a lever 9 that has a fulcrum and swings. This lever 9 is connected to the shaft 4. At this time, the air cylinder 8 plays the role of a connecting shaft, and the air cylinder 8
The length of the connecting shaft changes with f f .

As a result, apart from the movement by the plate cam 6, the open position of the positioning pawl 1 can be changed in two stages.

As described above, according to this embodiment, the open position of the claw 1, which is positioned by the air cylinder 8, changes, and the stroke required for centering becomes less than half. Thereby, damage to the chip-type electronic component can be reduced.

Effects of the Invention As described above, according to the present invention, by changing the length of the connecting shaft, accurate centering can be achieved without applying excessive force to the chip-type electronic component. Therefore, there is an effect of improving the quality of circuit board formation.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a centering device showing an embodiment of the present invention, and FIG. 2 is a perspective view of a conventional centering device. 1...Claw, 2...Centering unit, 4...Shaft, 6...Plate cam,
8...-Air cylinder

Claims (2)

[Claims] (1) A centering unit that has a pawl for positioning a chip-type electronic component and a means for opening and closing the pawl, a plate cam that serves as a driving source, and a shaft that transmits the movement of the plate cam to the centering unit and opens and closes the pawl. and a drive unit that changes the length of this shaft. (2) The electronic component centering device according to claim 1, wherein the drive unit for varying the shaft length is constituted by an air cylinder, and the claw opening/closing position is switched in two stages.