JPH0547337B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a component mounting device for mounting components on a board.

[Prior art]

2. Description of the Related Art Conventionally, component mounting devices have been used to attach electronic components to printed circuit boards. This device has a Y base that moves horizontally in the Y direction (vertical direction) on an X base that moves horizontally in the X direction (horizontal direction), and a chuck mechanism that moves vertically on this Y base ( A component mounting mechanism) is provided, and a component supply device is provided on one side of the X base, and the chuck mechanism is moved to grip the desired component of the component supply device, and the board is moved parallel to the X base. Transport the board using the transport mechanism and install the board on the Y base, move the X base and Y base appropriately to position the part of the board on which the component is to be attached under the chuck of the chuck mechanism, and then press the chuck of the chuck mechanism. The board is lowered and desired parts are attached to the parts to be attached to the part of the board.

However, in such a conventional component mounting device, since the Y base is provided on the X base, the weight of the Y base is applied to the X base, and the X base and
Furthermore, the operational response of the parts attachment mechanism is poor, and
The drawback was that a large amount of driving force was required to drive the base, resulting in poor work efficiency.

[Problems to be Solved by the Invention] The problems to be solved by the present invention are to improve the operational response of the component mounting mechanism, reduce the required driving force, and further improve the work efficiency. It is in the point of doing.

[Means for solving problems]

In order to solve such problems, the present invention provides a conveyor that carries a board onto the base from outside the base, and a conveyor that transports the board after parts are attached from the base, and a frame provided on the base; a component ball screw provided on the frame along an extending direction of the frame;
The component ball screw for components is movable in the axial direction and rotational movement is restricted in the rotational direction, and the component of the board is fitted into the component ball screw and brought below the frame. a mounting mechanism for mounting a component at a mounting position; a component servo motor for rotationally driving the component ball screw to move the mounting mechanism to a component mounting position on a board below the frame; and an extension of the frame. A ball screw for a board is provided on the base so as to be substantially orthogonal to the direction, and a ball screw for a board is movable in the axial direction of the ball screw for the board, but rotational movement is restricted in the direction of rotation. a board transport mechanism that is fitted into the frame and is provided so as to be able to be latched to the board; It is characterized by having a servo motor for the board that rotationally drives the ball screw for the board.

[Effect]

The component mounting device of the present invention drives the board servo motor to rotate the board ball screw and move the board transport mechanism to attach the board to the component while the board is latched onto the board transport mechanism. Move the position down the frame. On the other hand, by driving the component servo motor, the component ball screw is rotated, and the mounting mechanism is moved to the component assembly position on the board located below the frame, thereby attaching the component. Then, the above steps are repeated using the board servo motor and the component servo motor to attach the components to a plurality of component attachment positions on the board. Therefore, the servo motor for the board, the ball screw for the board, and the board transport mechanism are used to position the board in the moving direction, that is, to relatively position the component in one direction with respect to the board. Positioning of the component with respect to the board in a direction substantially perpendicular to the above direction using the screw and the component attachment mechanism is repeatedly performed corresponding to a plurality of component attachment positions.

〔Effect of the invention〕

According to the component mounting position of the present invention, the relative positioning of the component in one direction with respect to the board and the positioning in a direction substantially perpendicular to this are performed independently, so that the positioning can be performed more accurately. , it can be attached to a plurality of component mounting positions on the board.

Furthermore, since the components are positioned independently in two substantially orthogonal directions, the configuration is simplified, driving force can be reduced, and costs can be reduced. Furthermore, if the positioning operation is performed in both directions substantially simultaneously, the operational response will be improved.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 3.

Reference numeral 1 in FIG. 1 is a base, and the base 1 is provided with a conveyor 3 for carrying a printed circuit board 2 for mounting components onto the base 1 from outside the base 1.

Further, a substrate transport mechanism 4 is provided on one side of the base 1. To explain this substrate transport mechanism 4, a mounting plate 5 is attached to a base 1.
Brackets 6, 6 are provided at both ends of the mounting plate 5, and a spline shaft 7 is rotatably supported by these brackets 6, 6. One end of this spline shaft 7 projects outward from one bracket 6, and a pin 8 perpendicular to the spline shaft 7 is provided at this projecting end. The tip of a piston rod of a cylinder mechanism 9 attached to the base 1 is connected to this pin 8 so that the spline shaft 7 can be rotated reciprocally by expanding and contracting the cylinder mechanism 9. The spline shaft 7 has two sliding bodies 1 each having a spline formed on its inner periphery and a protrusion 10 provided on its outer periphery.
1 and 12 are slidably fitted together. The two sliding bodies 11 and 12 are connected at a predetermined interval by a connecting rod 13 that connects the respective protrusions 10 and 10. Further, pilot pins 14, 14 are provided on each of the sliding bodies 11, 12 so as to protrude on the side opposite to the protrusion 10. A pin portion 15 is provided at the tip of each pilot pin 14 so as to project downward and fit into a hole formed in the printed circuit board to press the board 2 downward. Further, a board servo motor 16 is mounted on the mounting plate 5. This servo motor 16 is located approximately below the center of the spline shaft 7. A substrate ball screw 17 is connected to the rotating shaft of the servo motor 16, and a screw 18 of the ball screw 17 is rotatably supported by the bracket 6. The ball screw nut 19 of the ball screw 17 allows one sliding body 11 to rotate through a projection 19a provided on the ball screw nut 19 and a bearing (not shown). connected.

The servo motor 16, ball screw 17, and sliding bodies 11 and 12 constitute a substrate transport and positioning mechanism.

On the other hand, brackets 20 and 21 are provided on the base 1 at a central portion in the longitudinal direction of the spline shaft 7 at a predetermined interval in a direction orthogonal to the axial direction of the spline shaft 7. These brackets 20 and 21 have two guide lines (guides) 2.
2 and 22 are supported horizontally and oriented in a direction perpendicular to the axial direction of the spline shaft 7 (transfer direction of the printed circuit board 2). Note that these brackets 20, 21 and guide rods 22, 22 constitute a frame. An attachment mechanism 23 for attaching components to the printed circuit board 2 is slidably fitted into the guide rods 22, 22. To explain this mounting mechanism 23, the bracket 2
A servo motor 24 for parts is attached to the upper part of 1, and a ball screw 25 for parts is connected to the rotating shaft of this servo motor 24. A screw 26 of the ball screw 25 is parallel to the guide rod 22, and its tip is rotatably supported by the bracket 20. ball screw 2
A ball screw nut (not shown) 5 is fixedly incorporated into the main body 27 of the attachment mechanism 23. The main body 27 has a vertical movement mechanism (cylinder mechanism) 2.
A chuck mechanism 29 that moves up and down by means of 8 is provided. This chuck mechanism 29 includes a suction chuck 30 connected to a negative pressure source (not shown) so as to be able to communicate with or shut off the suction chuck 30, and a vertical movement mechanism 2.
8. and,
The chuck mechanism 29 is connected to the horizontal shaft 3 provided on the vertical shaft 31.
2, and is configured to be rotated by a rotation drive mechanism (not shown).

The servo motor 24, ball screw 25, and vertical movement mechanism 28 constitute a drive positioning mechanism.

Further, a component supply device 42 is provided on the right side of the base 1 in FIG. 1 via a bracket 41. This component supply device 42 is provided with a shooter 43 that extends downwardly and has a lower end located near the chuck mechanism 29 . A slide lid (not shown) is provided at the lower end of the shooter 43 and is located on the side of the chuck mechanism 29, and inside this slide lid, a desired component in the component supply device 42 is selected and dropped. They are made to be prepared. Note that the slide lid can be opened and closed by a drive mechanism (not shown).

Next, the operation of the component mounting device configured as described above will be explained. First, chuck mechanism 2
Negative pressure is applied to the shutter 9, and the chuck mechanism 29 is rotated around the horizontal shaft 32 toward the shutter 43 by operating the rotational drive mechanism, so that the suction chuck 30 is opposed to the slide lid of the shutter 43. Then, the sliding lid drive mechanism is activated and the sliding lid opens. As a result, the suction chuck 30 is attached to the shutter 4.
Pick up the desired parts in 3. Then, the rotational drive mechanism operates to rotate the chuck mechanism 29 back to its original position, causing it to hang down (the state shown in FIG. 1).

Next, place the printed circuit board 2 on the base 1 from outside the base 1.
is placed and moved by the conveyor 3 to position it at a predetermined position (right side in FIG. 2).
Then, the cylinder mechanism 9 is extended and the sliders 11 and 12 are rotated together with the spline shaft 7 via the pin 8, whereby the pin portions 15 and 15 at the tips of the pilot pins 14 and 14 are lowered and attached to the printed circuit board 2. The printed circuit board 2 is inserted into the hole formed in the base 1, and the printed circuit board 2 is pressed against the base 1. Then, servo motor 1
6 is activated, and the ball screw nut 19 is
The sliding body 11 is pushed by the protrusion 19a and moves in the direction of the arrow A shown in the diagram together with the connecting rod 13 and the sliding body 12. When a predetermined part of the printed circuit board 2 is located under the movement trajectory along the rod 22, the servo motor 16, ball screw 17, sliding bodies 11, 12, pilot pins 14, 14, printed circuit board 2, etc. stop. do.
Next, the servo motor 24 is activated, and the mounting mechanism 23 moves along the guide mechanisms 22, 22 in the direction of arrow B or arrow C shown in FIG. It will stop when it is located directly above. Next, the vertical movement mechanism 28 is activated and the chuck mechanism 29 is lowered.
The chuck 30 attaches the component to a predetermined component attachment portion of the printed circuit board 2, cuts off the supply of negative pressure to the chuck mechanism 29, and then closes the chuck mechanism 2.
9 rises. Next, the servo motor 16 is operated again, and the pin portion 15 of the pilot pin 14 is moved in the direction of arrow A in FIG. 1 with the pin portion 15 fitted into the hole of the printed circuit board 2, thereby moving the printed circuit board 2 in this direction. Thereafter, the servo motor 24 is activated to return the mounting mechanism 23 to its original position near the shooter 43, the cylinder mechanism 9 is activated to raise the pin portion 15 of the pilot pin 14, and then the servo motor 16 is activated. Return the sliding bodies 11 and 12 to their original positions. By performing the above operations for each component to be attached, a large number of desired components can be attached to the printed circuit board 2. Note that the substrate transport mechanism 4 and the attachment mechanism 23 may be operated at the same time.

Therefore, according to this embodiment, the board transport mechanism 4 horizontally moves the board 2 and positions the component mounting position in the X direction, and the component mounting mechanism horizontally moves the chuck and positions the component in the Y direction. Since only the mounting positions are determined, components can be mounted at a plurality of component mounting positions on the printed circuit board 2 while positioning in each direction is independently and accurately performed.

Furthermore, since the components are positioned independently in two substantially orthogonal directions, the configuration is simplified, driving force can be reduced, and costs can be reduced. Furthermore, if the positioning operation is performed in both directions substantially simultaneously, the operational response will be improved.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front sectional view showing an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a partially cutaway side sectional view thereof. DESCRIPTION OF SYMBOLS 1... Base, 2... Printed circuit board, 4... Board transfer mechanism, 22... Guide rod (guide), 23...
...Mounting mechanism.

Claims (1)

[Scope of Claims] 1. A conveyor for carrying a board onto the base from outside the base and carrying out the board after parts have been attached from the base, and a conveyor provided on the base so as to cross over the board. a component ball screw provided on the frame along the extending direction of the frame; and a component ball screw that is movable in the axial direction and whose rotational movement is restricted in the rotational direction. and is fitted to the ball screw for the part,
a mounting mechanism for attaching a component to a component mounting position on the board brought below the frame; and a ball screw for the component to move the mounting mechanism to a component mounting position on the board below the frame. a component servo motor that rotates; a board ball screw provided on the base so as to be substantially perpendicular to the extending direction of the frame; and a board ball screw that is movable and rotatable in the axial direction. In terms of direction, rotational movement is restricted and the substrate is fitted into the ball screw for the substrate, and the substrate transport mechanism is provided so as to be latched to the substrate, and the plurality of substrates latched to the substrate transport mechanism are fitted into the substrate ball screw. A component mounting device comprising: a board servo motor that rotationally drives the board ball screw to move the component mounting position below the frame.