JPH07186081A - Mechanical chuck in electronic component furnishing device - Google Patents

Abstract

PURPOSE:To realize the mounting of various electronic components by means of one electronic component furnishing device by making the shape of a fitting portion to an electronic component furnishing device the same as that of the fitting portion of a suction nozzle, equipping a check portion to be opened/closed by means of negative pressure that makes the suction nozzle conduct sucking action. CONSTITUTION:An electronic component furnishing device fitted with a suction nozzle 30 and a centering claw 14 equipped with a claw piece 14a at its tip sucks electronic components by means of the suction nozzle 30 and at the same time conducts the centering of the electronic components by means of the centering claw 14, and afterwards, conducts the mounting of an electronic component at the predetermined portion of a printed board. Next, in the case in which the mounting of a different electronic component is conducted, the suction nozzle 30 is pulled out downward, and taken off from a nozzle holder 16 against the restraining force of retention levers 18. Next, a mechanical chuck 20 which has built-in piston member 222a, 222b is inserted between the retention levers 18 from the lower part, and by engaging a joining portion 211 with the joining portion 19 of the nozzle holder 16, change to the mechanical chuck 20 is finished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical chuck in an electronic component mounting apparatus, and more particularly, in an electronic component mounting apparatus detachably equipped with a suction nozzle for holding an electronic component by negative pressure, replacing the suction nozzle. The present invention relates to a mechanical chuck that can be used.

[0002]

2. Description of the Related Art Generally, a mounting head of an electronic component mounting device for transporting and mounting electronic components from a component supply device to a printed circuit board sucks the electronic components with a suction nozzle and grips them with a centering claw. There are a type in which mounting is performed after centering, and a type in which an electronic component is sucked by a suction nozzle, an error in a suction position is detected by an image processing device, and the error is corrected before mounting. However, in both types, the flat upper surface of the electronic component is suction-held by the suction nozzle.

On the other hand, there are various types of electronic components mounted on a printed circuit board, such as those in which the upper surface of the electronic component is not flat, or those in which the upper surface of the electronic component has protrusions or burrs. With respect to the electronic components having these shapes, the above-described ordinary electronic component mounting apparatus using the suction nozzle cannot hold the electronic components, and thus cannot be mounted on the printed circuit board. Therefore, for electronic components that cannot be held by the suction nozzle, use mechanical chucks that grip both ends of the electronic component or the protrusions on the upper surface with claws, convey it from the component supply unit to the printed circuit board, and mount it. It was implemented by work.

[0004]

As described above, if even one electronic component that cannot be held by the suction nozzle is mixed in the electronic components mounted on the printed circuit board, this electronic component is mounted on the printed circuit board. Therefore, it has been necessary to intervene manpower or install another electronic component mounting device equipped with a mechanical chuck and perform the process in another process. Therefore, there have been problems that it is impossible to completely automate the mounting work, and the electronic component mounting line becomes large-scale and the control program becomes complicated when the mounting work is fully automated.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a mechanical chuck that can be easily replaced by a commonly used suction nozzle in a single electronic component mounting apparatus. To do. By using this mechanical chuck, there is no need to install an electronic component mounting device equipped with a mechanical chuck separately from an electronic component mounting device equipped with a suction nozzle, and a large-scale mounting line and a complicated control program should be prepared. And easily realizes complete automation of mounting work.

[0006]

In order to achieve the above object, a mechanical chuck of the present invention, which is used by attaching a suction nozzle to an exchangeable electronic component mounting apparatus, has a mounting portion to the electronic component mounting apparatus, The chuck has the same shape as the mounting portion of the nozzle and includes a chuck portion that opens and closes by a negative pressure that causes the suction nozzle to perform a suction operation. Preferably, the chuck portion is moved by the negative pressure. The piston member and a grip claw that is connected to the piston member and is opened and closed by the movement of the piston member are configured.

[0007]

The mechanical chuck in the electronic component mounting apparatus of the present invention having the above-described structure is designed to replace the suction nozzle with the mechanical chuck when the special electronic component that cannot be gripped by the normal suction nozzle is mounted. The special electronic component is mounted by mounting it on a mounting device and opening and closing the chuck portion by the negative pressure of the suction means used for the suction nozzle.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a sectional view showing a state in which a mechanical chuck according to an embodiment of the present invention is attached to a mounting head of an electronic component mounting apparatus, FIG. 2 is an enlarged sectional view of an essential part of FIG. 1, and FIG. 3 is a mounting head of an electronic component mounting apparatus. FIG. 3 is a sectional view showing a state in which a suction nozzle is attached instead of the mechanical chuck. In these drawings, 10 is a mounting head in an electronic component mounting apparatus, which includes a mechanical chuck 20 and a suction nozzle 30.
Can be attached interchangeably. Since the mounting head 10 that is currently used can be used as it is, the structure thereof will be described only for necessary parts.

Reference numeral 11 denotes a central shaft penetrating the central portion of the mounting head 10, which is connected to a driving means provided in the mounting machine main body (not shown), and the driving means performs the vertical movement required for mounting work. The central shaft 11 has a hollow hole 1
1a is provided and connected to a suction means (not shown) so that suction is performed at a predetermined timing. 12 is the central axis 1
A claw actuating cylinder 13 is provided on the outer periphery of the sleeve 12 so as to be vertically movable relative to the central shaft 11. Reference numeral 14 denotes a centering claw, which is rotatably supported by the sleeve 12 via a support shaft 15. When the head is pressed by the claw operating cylinder 13, the claw 14 is closed to sandwich the electronic component for centering. Central axis 11
A nozzle holder 16 is fixed to the lower end of the nozzle holder, and the outer circumference of the nozzle holder 16 is urged toward the center in the radial direction by arbitrary urging means 17 at a plurality of positions, for example, four positions at intervals of 90 degrees. A nozzle holding lever 18 is provided. In addition, the lower end of the nozzle holder 16 has a center hole 19a.
A joint portion 19 having is formed.

As shown in detail in FIG. 2, the mechanical chuck 20 comprises a nozzle body 210 and a chuck portion 220. The nozzle body 210 has a joint portion 211 that engages with the joint portion 19 of the nozzle holder 16 in the head portion, and a concave portion 212 in which the nozzle body 210 is locked by the holding lever 18 is formed in the upper outer periphery. Also,
A hollow hole 213 corresponding to the hollow hole 19a of the nozzle holder 16 is formed at the center of the nozzle body 210. It should be noted that the joint portion 211 and the concave portion 212 of the nozzle body 210 are
Has the same shape as the joint and the recess of the suction nozzle 30 described later. The joint portion 211 and the concave portion 212 form a mounting portion of the mechanical chuck 20.

The chuck portion 220 is provided below the nozzle body 210. As shown in FIG. 2, the nozzle body 21
A horizontal hole 221 is bored in the lower radial direction of 0, and two piston members 222a,
222b is movably fitted. Further, a spring 223 is provided between the two piston members 222a and 222b.
And two piston members 222a, 222
b is constantly urged outward in the radial direction. Further, the lateral hole 22
A hollow hole 213 is connected to the center of 1 (between the piston members 222a and 222b).

Reference numerals 224a and 224b are hook-shaped gripping claws, the upper end of which is rotatably attached to the nozzle body 210.
The intermediate portion is locked to the outer ends of the piston members 222a and 222b so as to interlock with the piston members 222a and 222b, and the lower end portion is provided with a claw portion for gripping an electronic component. Therefore, in the mechanical chuck 20, the piston members 222a and 222b are moved radially outward by the elastic force of the spring 223 when the suction means does not suck, and the gripping claws 224a and 224a of the chuck portion 220 are moved.
When the suction means performs suction to make the lateral hole 221 negative pressure, the piston members 222a, 222 are opened.
2b is attracted to the center side in the radial direction and chucked 220
The grasping claws 224a and 224b are closed.

The mechanical chuck of this embodiment having the above-mentioned structure is used by replacing it with the electronic component mounting apparatus having the suction nozzle as follows. That is,
As shown in FIG. 3, the suction nozzle 30 and the claw piece 14 on the tip end.
The electronic component mounting apparatus having the centering claw 14 provided with a is configured to suck the electronic component with the suction nozzle 30 and to center the electronic component with the centering claw 14 (the claw piece 14a), and then to perform printing (not shown). Electronic components are mounted at predetermined positions on the board.

Next, for example, when it is necessary to mount an electronic component having a protrusion on the upper surface, the suction nozzle 30 is pulled out downward, and the suction nozzle is pulled from the nozzle holder 16 against the deterrent force of the holding lever 18. Remove 30. Next, the mechanical chuck 20 is inserted from below from between the holding levers 18 so that the joint portion 211 is engaged with the joint portion 19 of the nozzle holder 16 and the holding lever 1 is inserted into the concave portion 212.
Lock 8 This completes the replacement of the suction nozzle 30 with the mechanical chuck 20. When using the mechanical chuck 20, the centering claw 1
When the four claw pieces 14a get in the way, the centering claws 14 may be removed by removing the claw pieces 14a from the centering claw 14 or by pulling out the support shaft 15. In addition, the mechanical chuck 20 is attached to the mounting head 10.
It is desirable to provide a well known detent structure near the joints 19,211 so that it will not be mounted in a rotated position relative to.

When the mounting of the mechanical chuck 20 is completed, the electronic component mounting apparatus vertically moves and laterally moves to mount the electronic component on the printed circuit board in the same manner as when the mounting head 10 uses the suction nozzle 30. . That is, when the electronic component mounting device takes out the electronic component from the component supply device, the suction means operates to make the inside of the lateral hole 221 a negative pressure, and thereby the piston members 222a, 222.
22b is moved inward in the radial direction to move the grip claws 224a, 2b.
The upper surface protrusion of the electronic component is gripped by 24b. In this state,
When the electronic component mounting apparatus conveys the electronic component to the mounting position of the printed circuit board, the suction means stops its operation and the lateral hole 221.
The negative pressure state inside is released, and the elastic force of the spring 223 opens the grip claws 224a and 224b to mount the electronic component at a predetermined position on the printed circuit board. Since the timing of opening and closing the chuck may be exactly the same as the timing of sucking the electronic component by the suction nozzle, the mechanical chuck 20
There is no need to change the sequence or timing of operations by using.

From the mechanical chuck 20 to the suction nozzle 3
The replacement to 0 can be performed by the same operation as the replacement operation from the suction nozzle 30 to the mechanical chuck 20 described above. When the centering claw 14 is opened and closed by an independent drive source, the centering claw 14 is kept in the open state and is not operated, and the mechanical chuck 20 is also sucked by using the automatic replacement device of the suction nozzle 30. It is possible to replace it just like the nozzle. In this case, the mechanical chuck 20 can be fully automated including replacement.

When the electronic component has a burr on the upper surface or the upper surface is not flat, as shown in FIG. 4, a gripping claw of a type that grips both sides of the electronic component by widening the spacing between the gripping claws is used. To use.

The present invention is not limited to the above embodiment, but various modifications can be made within the scope of the invention. For example, the attachment portion to the nozzle holder 16 may have a configuration other than the configuration including the joining portion 211 and the recess 212 described above.

[0019]

As described above, according to the mechanical chuck in the electronic component mounting apparatus of the present invention, it can be used by replacing it with a normal suction nozzle. It becomes possible to mount electronic components of various shapes including non-planar electronic components with one electronic component mounting device. Also, since the chucking operation can be performed by the suction means used for the suction nozzle, a special auxiliary device can be provided in the electronic component mounting device,
There is no need to prepare a complicated control program, and there is no need to change the operation sequence or timing at all. Furthermore, since it is not necessary to install a plurality of electronic component mounting devices, it is possible to prevent the mounting line from increasing in size and from increasing the number of processes.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a mechanical chuck in an electronic component mounting apparatus of the present invention.

FIG. 2 is an enlarged sectional view of a main part of FIG.

FIG. 3 is a partially cutaway front view of the electronic component mounting apparatus showing a state in which a suction nozzle is mounted instead of the mechanical chuck of the present invention.

FIG. 4 is an enlarged cross-sectional view of an essential part of an embodiment in which a gripping claw interval of a mechanical chuck in an electronic component mounting apparatus of the present invention is widened.

[Explanation of symbols]

 10 Mounting Head 11 Center Axis 16 Nozzle Holder 18 Holding Lever 19 Joint 20 Mechanical Chuck 210 Nozzle Main Body 211 Joint 212 Concave 213 Hollow Hole 220 Chuck 221 Horizontal Hole 222a, 222b Piston Member 224a, 224b Grip Claw

Claims (2)

[Claims] 1. A mechanical chuck used by being attached to a replaceable electronic component mounting device of a suction nozzle, wherein a mounting portion to the electronic component mounting device has the same shape as the mounting portion of the suction nozzle, and A mechanical chuck in an electronic component mounting apparatus, comprising: a chuck unit that opens and closes by a negative pressure that causes the suction nozzle to perform a suction operation. 2. The electronic component mounting apparatus according to claim 1, wherein the chuck portion includes a piston member that is moved by the negative pressure, and a grip claw that is connected to the piston member and that is opened and closed by the movement of the piston member. Mechanical chuck in.