JP2001135992A - Component mounting device and component mounting method - Google Patents

Abstract

(57) [Problem] To provide a component mounting apparatus and a component mounting method capable of preventing troubles such as dropping and displacement of electronic components, reducing noise and preventing equipment failure. SOLUTION: While rotating a cylindrical structure 16 rotatable about a substantially vertical axis H, an arm shape attached to an outer peripheral portion of the cylindrical structure 16 and capable of swinging about a substantially vertical axis. By swinging the structure 18 in the direction opposite to the rotation of the cylindrical structure 16, the nozzle attached to the arm-shaped structure 18 at the component suction location B, the component suction attitude confirmation location D, and the component mounting location C While keeping 17 stationary, the operation of picking up the component, checking the attitude of picking up the component, and mounting the component is performed. This allows
The nozzle 17 can be stopped at a predetermined position while the cylindrical structure 16 is constantly rotating.
And adverse effects due to inertial force of electronic components.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a component mounting apparatus and a component mounting method for automatically mounting electronic components on a circuit board.

[0002]

2. Description of the Related Art A conventional component mounting apparatus will be described with reference to FIG. FIG. 5 is a perspective view showing a schematic structure of a rotary head type component mounting apparatus generally used as this type of component mounting apparatus. In FIG. 5, reference numeral 1 denotes a component supply device for sequentially supplying the electronic components 2, and 3 denotes a component supply table on which a plurality of component supply devices 1 can be mounted in parallel. A ball screw 5 rotated by a motor 4 is screwed into the component supply table 3. By rotating the ball screw 5 by the motor 4, the component supply table 1 on which a plurality of component supply devices 3 are placed is placed. The electronic component 2 is moved in the parallel direction (axial direction A) of the component supply device 3, and as a result, a required electronic component 2 is supplied to a predetermined component supply position (substantially the same as a component suction position B described later). ing.

Reference numeral 6 denotes a cylindrical structure rotatable about a substantially vertical axis H. A plurality of vertically movable nozzles 7 for sucking and holding the electronic components 2 are fixed at predetermined angles around the cylindrical structure. Have been. Electronic component 2 from component supply device 1 to nozzle 7
When the electronic component 2 is sucked, the nozzle 7 positioned at the component sucking position B is lowered, and air is sucked from the tip thereof to suck the electronic component 2. At this time, the component supply table 3 indicates that the desired component supply device 1 has the component suction position B
Is moved in advance so as to be located immediately below the nozzle 7 of the above. The circuit board 8 on which the electronic component 2 is mounted is supported by a circuit board support table 9 which is movable in the X and Y directions.
In order to position the nozzle 7 sucking the nozzle at the mounting position C on the circuit board 8, the cylindrical structure 6 is rotated until the nozzle 7 reaches the mounting position C, the nozzle 7 is lowered, and the air suction is released. The electronic component 2 is mounted on a circuit board 8.

[0004] At the time of such component suction or component mounting, accurate positioning cannot be performed unless the nozzle 7 is kept stationary with respect to the component supply device 1 or the circuit board 8. The mounting operation of the electronic component 2 fails or the posture of the electronic component 2 shifts. In order to prevent such a problem, the tubular structure 6 performs an intermittent rotation that alternately alternates between a rotating state and a stationary state, and performs each operation of component suction and component mounting in the stationary state. As an apparatus for generating the intermittent rotation, an indexing unit 11 that outputs a motor 10 that rotates at a constant speed and outputs an intermittent rotation is used.

[0005]

As described above, in the conventional rotary head type component mounting apparatus, since the cylindrical structure 6 to which the nozzle 7 is fixed is intermittently rotated, the cylindrical structure 6 is accelerated. The deceleration is repeated, and a large inertia force acts on the electronic component 2 held at the tip of the nozzle 7 each time. In particular,
When speeding up the operation of the component mounting apparatus, the inertial force makes the component adsorption state unstable, which has caused troubles such as dropping and displacement of the electronic component 2.

In addition, the repetition of acceleration and deceleration of the tubular structure 6 causes noise and also causes equipment failure due to a load on the mechanical system. The present invention is to solve these problems, and to provide a component mounting apparatus and a component mounting method capable of preventing troubles such as dropping and displacement of electronic components, reducing noise, and preventing equipment failure. It is an object.

[0007]

In order to solve the above-mentioned problems, a component mounting apparatus according to the present invention comprises a tubular structure rotatable about a substantially vertical axis, and a rotation driving means for rotating the tubular structure. And an arm-shaped structure attached around the cylindrical structure and capable of swinging about a substantially vertical axis; swing means for swinging the arm-shaped structure; and an electronic device attached to the arm-shaped structure. And a nozzle capable of holding the component by suction.

[0008] With this configuration, it is possible to prevent troubles such as dropping and displacement of electronic components, reduce noise, and prevent equipment failure.

[0009]

A component mounting apparatus according to a first aspect of the present invention includes a tubular structure rotatable about a substantially vertical axis;
Rotation drive means for rotating the cylindrical structure, arm-shaped structure attached around the cylindrical structure and capable of swinging about a substantially vertical axis, and swinging means for swinging the arm-shaped structure; And a nozzle attached to the arm-shaped structure and capable of holding the electronic component by suction.

According to this configuration, by swinging the arm-shaped structure in the direction opposite to the rotation of the cylindrical structure, the nozzle can be stopped at a predetermined position while always rotating the cylindrical structure. According to a second aspect of the present invention, in the component mounting apparatus according to the first aspect, at the time of component suction, at the time of component suction attitude confirmation,
At least one of the parts mounting is configured to swing the arm-shaped structure in a direction opposite to the rotation of the cylindrical structure.

With this configuration, it is possible to stop the nozzle at a predetermined position while constantly rotating the tubular structure, so that the inertial force on the electronic component can be reduced and the component suction state becomes unstable. This can be prevented, and the need for the intermittent rotation of the tubular structure is eliminated, so that noise and equipment failure due to the intermittent rotation of the tubular structure do not occur.

The invention described in claim 3 is the first or second invention.
In the component mounting apparatus described in (1), an expansion / contraction means for expanding / contracting the arm-shaped structure is provided. With this configuration, even when the tubular structure and the arm-shaped structure operate, the distance from the rotation center of the tubular structure to the nozzle can be kept constant, and the stationary position accuracy of the nozzle can be ensured.

According to a fourth aspect of the present invention, there is provided a component mounting method comprising:
A component mounting method in which a component is supplied and sucked to a nozzle at a component suction location, a component suction attitude is checked at a component suction attitude check location, and a component is mounted on a circuit board by a nozzle at a component mounting location, and is substantially vertical. While rotating a cylindrical structure rotatable about a simple axis, an arm-shaped structure attached to the outer peripheral portion of the cylindrical structure and swingable about a substantially vertical axis rotates the cylindrical structure. The nozzle attached to the arm-shaped structure is stopped at at least one of the component suction position, the component suction position confirmation position, and the component mounting position by swinging in the opposite direction to the component suction position, the component suction position. And at least one of component mounting operations is performed.

According to this method, the nozzle can be stopped at a predetermined position at the time of component suction, component suction posture confirmation, component mounting, etc., while the cylindrical structure is constantly rotated. It is also possible to reduce the force, which can prevent the component suction state from becoming unstable, and eliminate the need for intermittent rotation of the cylindrical structure, thus reducing the noise caused by the intermittent rotation of the cylindrical structure. Generation and equipment failure will not occur.

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 is a perspective view illustrating a schematic structure of a component mounting apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 11 denotes a component supply device for sequentially supplying electronic components 12, and reference numeral 13 denotes a component supply table on which a plurality of component supply devices 11 can be mounted in parallel. A ball screw 15 rotated by a motor 14 is screwed into the component supply table 13, and the plurality of component supply devices 1 are
The component supply table 11 on which the component 3 is placed is moved along the parallel direction (axial direction A) of the component supply device 13, and as a result, necessary electronic components 12 are supplied to predetermined positions.

Reference numeral 16 denotes a cylindrical structure rotatable about a substantially vertical axis H. A plurality of vertically movable nozzles 17 for sucking and holding the electronic components 12 are provided around the cylindrical structure at predetermined angle intervals. It is attached via an arm-shaped structure 18. The arm-shaped structure 18 is swingable about a substantially vertical axis with the side of attachment to the tubular structure 16 as a fulcrum, and can swing the nozzle 17 attached to the tip thereof.

The means for rotating the cylindrical structure 16 includes:
A motor 19 capable of rotating at a constant speed is used. On the other hand, an indexing unit that generates intermittent rotation is not used. The circuit board 21 on which the electronic components 12 are mounted is supported by a circuit board support table 22 that is movable in the X and Y directions. In the example of the present embodiment, a servomotor 20 is attached to each arm-shaped structure 18 as a swinging means of the arm-shaped structure 18. The servomotor 20 can swing the arm-shaped structure 18 at an arbitrary speed and stop it at an arbitrary position.

When the electronic component 12 is passed from the component supply device 11 to the nozzle 17 and sucked, the nozzle 17 located at the component suction position B is lowered and the air is sucked from the tip thereof to suck the electronic component 12. . At this time, the component supply table 13 is moved in advance so that the desired component supply device 11 is located immediately below the nozzle 17 at the component suction position B. Further, the nozzle 17 at the component suction position B is stopped.

A method of stopping the nozzle 17 at this time will be described with reference to FIGS. FIG. 2 (a)
FIG. 5 is a plan view of a main part showing the state of the arm-shaped structure 18 at the start of component suction. At this time, the arm-shaped structure 18 is swung forward in the rotation direction R of the tubular structure 16. .
FIG. 2B shows a state in which the components are being sucked, and the arm-shaped structure 18 is shown.
The nozzle 17 at the tip of the arm-shaped structure 18 is stopped at the component suction position B while swinging the cylindrical structure 16 in the direction opposite to the rotation direction R of the cylindrical structure 16. FIG. 2C shows the state at the end of component suction, in which the arm-shaped structure 18 is swung so as to be on the rear side in the rotation direction R of the tubular structure 16, and the nozzle 17 is moved by these swinging operations. The nozzle 17 is operated so as to be stationary during the component suction.

Here, since the cylindrical structure 16 has a cylindrical shape, the nozzle 17 is moved from the rotation center axis H of the cylindrical structure 16.
The distance L to the tip of the lens slightly changes with the rotation. The amount of change may be negligible in terms of equipment specifications, but if the amount of change is too large, the structure and method described below are used to make the arm-shaped structure 18 expandable and contractable.

FIG. 3 shows the method. FIG. 3 shows a state at the start of component suction, and shows the same timing as FIG. 2 (a). In the present embodiment, an air cylinder 23 is used as a means for expanding and contracting the arm-shaped structure 18. When the air supply is on, the arm cylinder 18 is fixed at the extension side when the air supply is on, and the air cylinder 23 can freely expand and contract the arm-like structure 18 according to external force when the air supply is off. In the present embodiment, a setting device 24 that can hold and position the nozzle 17 is used. These units operate as follows.

First, when the nozzle 17 reaches the component suction position B as shown in FIG. 3, the setting device 24 grips and fixes the nozzle 17. At the same time, the air supply to the air cylinder 23 is turned off, and the position setting of the nozzle 17 is entrusted to the setting device 24. Thereafter, the arm-shaped structure 18 can freely expand and contract by an external force.
, And the swing of the arm-shaped structure 18, the distance L from the rotation center axis H of the tubular structure 16 to the nozzle 17 can be kept constant.

The servo motor 20, which is a means for swinging the arm-shaped structure 18, is turned off at the same time as the gripping of the nozzle 17 by the setting device 24. If this method is used, the swinging of the arm-shaped structure 18 can be freely performed by an external force. Therefore, the rotation of the tubular structure 16 and the swinging of the arm-shaped structure 18 are complicated. It is also possible to eliminate control. In this case, the operation of swinging the arm-shaped structure 18 forward in the rotation direction R of the tubular structure 16 is performed by the swinging means (servo motor 20), but the operation of swinging the arm structure 18 backward is performed by an external force. Therefore, as the actuator of the swinging unit, an air cylinder similar to the expanding and contracting unit of the arm-shaped structure 18 can be used instead of the servomotor 20.

As shown in FIG. 4, as described above, at the time of picking up the component from the component supply device 11, the arm-shaped structure 18 is swung in the direction opposite to the rotation direction R of the cylindrical structure 16, and 17 is stopped. After completion of the component suction, the arm-shaped structure 18 is swung forward in the rotation direction R to prepare for the next component suction posture confirmation operation. When the nozzle 17 reaches the component suction posture confirmation position D, the rotation direction R of the cylindrical structure 16 is again set.
The nozzle 17 is stopped by swinging the arm-shaped structure 18 in the opposite direction. Then, after confirming the component suction posture,
The arm-shaped structure 18 is again swung forward in the rotation direction R to prepare for the next component mounting operation. When the nozzle 17 reaches the position above the circuit board 21 (mounting position C), the arm-shaped structure 18 is again swung in the direction opposite to the rotation direction R of the cylindrical structure 16 to stop the nozzle 17. After the component mounting operation is completed, one cycle of component mounting is completed by swinging the arm-shaped structure 18 forward in the rotation direction R again.

As described above, by rotating the cylindrical structure 16 and the arm-shaped structure 18 in opposite directions, the nozzle 17 can be stopped without intermittent rotation of the cylindrical structure 16 itself. As a result, the intermittent rotation of the tubular structure 16 as in the conventional rotary head type component mounting apparatus is eliminated, so that the instability of the component suction state due to the inertial force, noise, and a burden on the mechanical system can be prevented. . Further, by using the expandable and contractable arm-shaped structure 18 and the means for expanding and contracting the arm-shaped structure 18, the distance from the rotation center of the tubular structure 16 to the nozzle 17 becomes constant, and the stationary position accuracy of the nozzle 17 is improved. Can be improved.

[0026]

As described above, according to the present invention, the nozzle is attached to the tubular structure via the arm-like structure which can swing about a substantially vertical axis. By rotating the tubular structure in the opposite direction, a component mounting apparatus that stops the nozzle without intermittently rotating the tubular structure itself can be realized. This eliminates the intermittent rotation of the tubular structure as in the conventional rotary head type component mounting apparatus,
It is possible to prevent instability of the component suction state due to inertial force, noise, and a load on a mechanical system.

Also, when picking up a part or checking a part picking posture,
At least during component mounting, the arm-shaped structure is swung in the direction opposite to the cylindrical structure, so that when the component needs to be stopped by the rotary head type component mounting device, the component suction posture is checked. At the time of component mounting, an operation method of stopping the nozzle without stopping the tubular structure is realized.

Further, by extending and contracting the arm-shaped structure, the distance from the center of rotation of the tubular structure to the nozzle can be made constant, and the stationary position accuracy of the nozzle can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a component mounting apparatus according to an embodiment of the present invention.

FIGS. 2 (a) to 2 (c) respectively show the components mounting apparatus;
A main part plan view showing the state of the arm-shaped structure at the start of component suction, a main part plan view showing the state of the arm-shaped structure during component suction, and a main part showing the state of the arm-shaped structure at the end of component suction. Plan view

FIG. 3 is a plan view of a main part showing a state of an arm-like structure at the time of starting component suction of the component mounting apparatus.

FIG. 4 is a conceptual plan view for explaining the operation of the arm-shaped structure in the component mounting apparatus.

FIG. 5 is a perspective view of a conventional component mounting apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Component supply apparatus 12 Electronic component 16 Cylindrical structure 17 Nozzle 18 Arm-shaped structure 19 Motor (rotation drive means) 20 Servo motor (oscillation means) 21 Circuit board 23 Air cylinder (expansion and contraction means) 24 Regulation device

Continued on the front page (72) Inventor Hiroki Yamamoto 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 5E313 AA03 AA11 AA15 CC03 CC04 CD06 DD01 DD02 DD13 DD23 DD50 EE01 EE02 EE24 EE25 EE33 EE50 FF21 FF31

Claims (4)

[Claims] 1. A tubular structure rotatable about a substantially vertical axis, rotation driving means for rotating the tubular structure, and a rocking means mounted around the cylindrical structure and swinging about a substantially vertical axis. A component mounting apparatus having a movable arm-shaped structure, a swinging unit for swinging the arm-shaped structure, and a nozzle attached to the arm-shaped structure and capable of sucking and holding an electronic component. 2. The apparatus according to claim 1, wherein the arm-shaped structure is swung in a direction opposite to the rotation of the tubular structure during at least one of picking up the component, checking the picked-up posture of the component, and mounting the component. Component mounting equipment. 3. The component mounting apparatus according to claim 1, further comprising an expansion / contraction means for expanding / contracting the arm-shaped structure. 4. A component mounting method in which a component is supplied and sucked to a nozzle at a component suction location, a component suction attitude is checked at a component suction attitude check location, and a component is mounted on a circuit board by a nozzle at a component mounting location. The arm-shaped structure attached to the outer peripheral portion of the cylindrical structure and rotatable about the substantially vertical axis while rotating the cylindrical structure rotatable about the substantially vertical axis. By oscillating in the direction opposite to the rotation of the arm-shaped structure, the nozzle attached to the arm-shaped structure is stopped at least at any of the component suction location, the component suction attitude confirmation location, and the component mounting location, A component mounting method for performing at least one of suction, confirmation of a component suction attitude, and component mounting.