JPH0644160Y2 - Chip part centering mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a chip component centering mechanism in a chip component mounting machine for mounting a chip component having no lead wire on a printed circuit board.

(Outline of the Invention) The present invention relates to a chip component centering mechanism in a chip component mounting machine, which is one of two pairs of centering claws.
By devising the shape of the pair of tip portions, the positioning of the chip component having the cylindrical portion can be surely executed.

(Prior Art) A mounting head mechanism has been proposed by the applicant of the present application in Japanese Utility Model Application Laid-Open No. 58-46476, in which a pair of clamping members for clamping a chip component is provided around a suction pin for clamping and holding the chip component. Also,
A mechanism for centering the chip component (positioning with respect to the center of the suction pin) using two pairs of clamping members for clamping the chip component has already been proposed. However, the tip surfaces of these sandwiching members that are in contact with the chip component are all simple flat surfaces.

(Problems to be Solved by the Invention) As described above, the conventional chip part centering mechanism is
A member that holds the chip component (that is, a centering claw)
Since the tip surface of the is a simple flat surface, it is possible to position the chip component with a rectangular parallelepiped in four directions in a plane, but for chip components with a cylindrical upper part and a rectangular plate lower part (such as electrolytic capacitors), In planar four-way positioning, even if an attempt is made to perform positioning with high accuracy, the stability in the height direction is poor, and there is a concern that the positioning reliability will decrease.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a chip part centering mechanism which can accurately and stably perform positioning of a chip part having a cylindrical upper part and a rectangular plate lower part.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention has two pairs of centering claws openably and closably arranged around a suction pin that suction-holds a chip component having a columnar portion, and drives it. A chip part centering mechanism for positioning a chip part by sandwiching the chip part by the two pairs of centering claws by driving the tips of the centering claws by members to close the tip part of the centering claw. A V groove in the height direction is formed at the tip facing the part so as to abut on the cylindrical part of the chip part so as to position the center of the cylindrical part and to stand upright, and the tip surfaces of the other pair of centering claws are When the chip parts are clamped, the two flattened center planes are formed so as to be inclined flat surfaces so as to generate a force in the direction of lifting the suction pin side. Has a configuration in which a plane plane other pair pair is disposed of grayed pawl is disposed has to be orthogonal.

(Operation) In the chip component centering mechanism of the present invention, a V groove is formed at the tip of the pair of centering claws facing the chip component, and the inner surface of the V groove is brought into contact with the cylindrical portion of the chip component, The center position and the upright position of the cylindrical portion can be accurately and stably performed. Further, the remaining pair of centering claws sandwiches the rectangular plate portion of the chip component to correct bending and positional deviation in the rotational direction.

(Embodiment) An embodiment of a chip part centering mechanism according to the present invention will be described below with reference to the drawings.

In FIG. 1 to FIG. 5, a pair of centering claws 1 facing each other are parallel 2 of the rectangular plate portion 30A of the chip part 30.
The tip surface 1A is a flat surface so as to face the side. The remaining pair of centering claws 2 facing each other are chip parts.
The V groove 3 is formed in the height direction (column axis direction) at the tip of the column 30 facing the column portion 30B. Here, the plane on which the pair of centering pawls 1 is arranged is orthogonal to the plane on which the other pair of centering pawls 2 is arranged. The suction pin 4 sucks and holds the chip component 30 by vacuum suction, and the central axis of the suction pin 4 and the center of the space surrounded by the respective 1 and 2 coincide with each other. The tip surfaces 1A of the centering claws 1 facing each other may form two planes parallel to each other when the chip component 30 is sandwiched, but in reality, a force is generated to slightly lift and push the chip component toward the suction pin. As shown in FIG. 3, it is inclined.

As shown in FIGS. 4 and 5, the suction pin 4 is fixed to the lower end of the hollow shaft 5, and the hollow shaft 5 has a body frame 6
It is driven up and down by a lifting air cylinder 7 attached to. The hollow shaft 5 is connected to a negative pressure source by a hose (not shown), and the inside of the hollow shaft 5 is vacuumed.

A support block 8 is fixed to the body frame 6, and a cylindrical shaft 10 is rotatably supported by a bearing 9 on the support block 8. The hollow shaft 5 penetrates through the central portion of the cylindrical shaft body 10. A gear 11 is attached to the upper end of the cylindrical shaft 10.
Is fixed, is rotationally driven by a drive mechanism (not shown) for changing the component mounting direction, and is positioned at a predetermined rotational angle position.

The pair of centering claws 1 are pivotally attached to the lower end of the cylindrical shaft 10 by pins 12 as shown in FIG.
Further, the remaining pair of centering claws 2 are arranged on the plane orthogonal to the arrangement plane of the centering claws 1 as shown in FIG. That is, the centering claw 2 is pivotally attached to the lower end of the cylindrical shaft 10 by the pin 13. The rear ends of the claws 1 and 2 are urged by coil springs 14 so that the ends open.

Further, a first cylindrical driving member 15 is vertically slidably arranged on the cylindrical shaft body 10, and a second cylindrical driving member 16 is arranged thereon.
Is slidable up and down. And the cylindrical shaft
A collar member 17 is fixed to the intermediate portion of 10, and a compression spring 18 is arranged between the collar member 17 and the first cylindrical driving member 15. Similarly, a compression spring 19 is arranged between the collar member 17 and the second cylindrical drive member 16. Therefore, the first and second
The cylindrical drive members 15 and 16 are urged downward by compression springs 18 and 19, respectively.

The support block 8 has a pair of claw opening / closing air cylinders.
20 are integrated, and an elevating plate 22 is fixed to the lower part of the piston rod 21 of each air cylinder 20. The lift plate
22 is engaged with the outer convex portion 15A of the first cylindrical drive member 15,
The first cylindrical driving member 15 and the second cylindrical driving member 15
The cylindrical driving member 16 is pulled up. In FIG. 4, each piston rod 21 is in the raised position, and the first cylindrical drive member 15 is pulled up by the lift plate 22 so that the centering pawls 1, 2
The figure shows a state in which the tip of is open.

In the configuration of the above embodiment, the suction pin 4 is the chip component 30.
, The piston rod 21 of the air cylinder 20 for opening and closing the claw extends and the lifting plate 22 descends. As a result, the first
The cylindrical driving member 15 and the second cylindrical driving member 16 are compression springs.
It descends with the force of 18,19 and the convex portions 1B, 2B of each centering claw 1, 2
The centering pawl 1, by pressing against the force of the coil spring 14.
Rotate the tip of 2 in the closing direction. This makes the first
As shown in the figure, the inner surface of the V-shaped groove 3 formed at the tips of the pair of centering claws 2 abuts on the outer periphery of the cylindrical portion 30B of the chip component 30, and the cylindrical portion 30B is centered and upright (in the height direction). Tilt correction). Along with this, the bottom edge portion of the square plate portion 30A of the chip component 30 is sandwiched between the opposite tip surfaces 1A of the other pair of centering claws 1 as shown in FIG.
Angle out of the square plate portion 30A (positional deviation in the rotation direction,
Make a bend).

The chip component 30 centered as described above is mounted at a predetermined position on the printed circuit board by the lowering operation of the suction pin 4.

(Effects of the Invention) As described above, the chip component centering mechanism of the present invention is a mechanism for sandwiching a chip component with two pairs of centering claws to position the chip component, of the two pairs of centering claws. V-grooves in the height direction are formed at the tips of the pair of centering claws facing the chip part so as to abut on the cylindrical part of the chip part so as to position the center of the cylindrical part and to stand upright. The front end surfaces of the centering pawls are flat surfaces facing each other inclined so as to generate a force in a direction of lifting the chip component to the suction pin side, and one of the two pairs of centering pawls is formed. Since the plane on which is arranged and the plane on which the other pair are arranged are orthogonal to each other, the chip component having the cylindrical portion can be positioned reliably and stably.

[Brief description of drawings]

FIG. 1 is a plan sectional view showing an essential part of an embodiment of a chip part centering mechanism according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a side view thereof, and FIG. FIG. 5 is a side sectional view showing the centering claw and a portion associated therewith. 1,2 ... Centering claw, 3 ... V groove, 4 ... Suction pin, 5 ... Hollow shaft, 6 ... Body frame, 7,20 ... Air cylinder, 10 ... Cylindrical shaft body, 12,13 ...... Pin, 15,16 ...
... Cylindrical drive member.

Claims (3)

[Scope of utility model registration request] 1. A pair of centering claws are arranged so as to be openable and closable around a suction pin that suction-holds a chip part having a columnar portion, and a driving member drives the tip of each centering claw to close. In a chip part centering mechanism for sandwiching a chip part by the two pairs of centering claws to position the chip part, the tip is provided at a tip of the pair of centering claws of the two pairs of centering claws facing the chip part. A V-shaped groove in the height direction is formed which abuts on the columnar portion of the component so as to position the center of the columnar portion and to stand upright, and the tip surfaces of the other pair of centering claws are the same as those described above when the chip component is clamped. One of the two pairs of centering claws is arranged so as to be flat surfaces facing each other and inclined so as to generate a force in the direction of lifting to the suction pin side. A centering mechanism for chip parts, characterized in that the flat plane and the plane on which the other pair are arranged are orthogonal to each other. 2. A chip part centering mechanism according to claim 1, wherein the height of the tip of one pair of the two pairs of centering claws is different from the height of the tip of the other pair. 3. The pair of centering claws clamps the columnar portion of the chip component in the V groove, and the other pair of centering claws clamps the edges of the bottom surface of the chip component in mutually opposing planes. The chip component centering mechanism according to claim 2.