JP2606682B2 - Component mounting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component mounting apparatus for automatically mounting components such as electronic components on a work such as a circuit board.

[0002]

2. Description of the Related Art Conventionally, the following two types of component mounting apparatuses for automatically mounting electronic components on a circuit board have been known.

[0003] First, the first type is X
A circuit board is supplied on a -Y table, and positions on the circuit board where electronic components are to be mounted are sequentially positioned at predetermined mounting positions on the XY table. In the parallel component supply unit, the electronic components to be mounted are sequentially supplied to a predetermined component pick-up position, and a mounting head capable of holding the electronic components is mounted at a predetermined position above the component pick-up position of the component supply unit and the XY table. The electronic component held by the component supply unit is reciprocally moved to and from a position, and is mounted on a predetermined position of the circuit board.
However, in this type of component mounting apparatus, the component supply unit itself must be moved to a predetermined take-out position.
There is a limit to the type and number of parts that can be placed on the parts supply section,
With today's high-mix low-volume production becoming mainstream,
The following second type of mounting device is widely used.

That is, in the first type of component mounting apparatus, the mounting head side is provided on the XY table instead of fixing the circuit board and the component supply section side.
The component mounting operation is performed by sequentially moving the mounting head between a desired component supply unit and a predetermined mounting position of the circuit board.

[0005]

However, in the above-mentioned second type of mounting apparatus, the mounting head moves between the position of the component supply section on which the desired component is mounted and the predetermined mounting position on the board. Therefore, when the moving distance of the mounting head is long due to the arrangement of the component supply unit storing the used components with respect to the substrate, there is a problem that the component mounting efficiency is deteriorated.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a component mounting method with a high component mounting efficiency.

[0007]

The present invention SUMMARY OF], in order to solve the above problems, part capable of accommodating and unloading freely aligned to hold, the work held in a predetermined position, Wah
First component supply means configured to be movable and positionable while maintaining a constant relative position to the workpiece, and a second component arranged at a fixed position with respect to the workpiece to take out the component and enable the component. A component mounting method for taking out a component from a component supply unit including a supply unit and mounting the component on the workpiece, wherein the second component supply unit is provided in advance before mounting the component.
Parts are taken out in the order of component mounting from the
And the parts are supplied from the first parts supply means.
Taking out in the order of mounting the components stored in the above process and mounting it on the work.

[0008]

According to the present invention, components are taken out from the second component supply means and stored in the first component supply means, and the first component supply means is moved and positioned at a predetermined position with respect to the workpiece. By taking out the component from the first component supply means and mounting it on the work, the moving distance of the mounting head accompanying the component removal is shortened, and as a result, the component removal speed is increased, and high-speed mounting is enabled. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, a work transfer means 3 for transferring a jig 2 for holding a work 1 such as a circuit board in the X direction is disposed at one end in the Y direction of an area A for mounting components. The work transfer means 3 includes a guide 4 for supporting the jig 2 movably, a feed screw 5 and a drive motor 6 arranged in parallel to its side, and a feeder 4 as shown in detail in FIG. The moving body 7 includes a pair of engaging members 8 a and 8 b that move with the rotation of the screw 5 and can be disengaged from the jig 2. The engaging members 8a and 8b are pivotal arms 9 fixed to a rotating shaft 10.
, And the rotating shaft 10 is configured to be rotated by a cylinder device 11 and a lever 12.

A gate-shaped guide rail 13 is provided which extends over the center of the work transfer means 3 and extends to the other end in the Y direction. The guide rail 13 constitutes a moving path in the Y direction orthogonal to the X direction which is the conveying direction of the work conveying means 3, and a mounting means 14 movable along the moving path 13 is provided. I have.

The mounting means 14 is provided with a pair of mounting heads 16 which can be rotated by 180 ° and switched over by inversion on a movable carriage 15 which can be transported by itself along the guide rails 13. As shown in detail in FIG. 1, a turret 18 provided with a mounting shaft 17 which can be raised and lowered and rotatable, and a plurality of holders 19 for holding different parts is mounted at the lower end thereof.
Is installed. In FIG. 3, reference numeral 20 denotes a screw mechanism for elevating and lowering the mounting shaft, 21 a drive motor thereof, and 22 a rotating device for the mounting shaft.

As shown in FIG. 4, a turret 18 of the mounting head 16 is
An anvil unit 23 in which a plurality of anvils 24 are provided so as to face each of the holders 19 disposed in the Y direction is movably arranged in a Y direction by a guide rod 25. When the mounting means 14 is located at a reference position on the work transporting means 3, a clutch body 26 which is coupled to the mounting means 14 and can be separated from the fixed side which has been held so far is provided. And the anvil unit 23
Are connected to each other by a connecting cable 29 via an interlocking mechanism comprising a rotatable pinion 27 and a pair of racks 28 meshing on both sides thereof, and the mounting means 14 and the anvil unit 23 are interlocked in the same direction by the same amount. It is configured to move.

A tray feeder 30 as first component supply means is provided adjacent to the other end of the work transport means 3 in the Y direction.
Are arranged. Tray 3 of this tray feeder 30
1, a large number of component storage spaces are formed in the X and Y directions, and components are stored and stored in the component storage space.
It can be taken out freely. The tray 31 is supported by a slide rail 32 so as to be movable in parallel with the X direction, and is configured to be connectable to the moving body 7 by a clutch mechanism 33 such as a magnet clutch.

At the other end of the tray feeder 30 in the Y direction, a multiple loop feeder 34 having a large number of loop feeders 35 for supplying loose parts is arranged as second component supply means. . This multiple loop feeder 34
Details are disclosed in, for example, JP-A-56-78533. Also, on the other end side in the Y direction of the multiple loop feeder 34, a large number of components are accommodated in a tape-shaped component aggregate or a stick in which components are accommodated in a tape-shaped holder, similarly as second component supply means. A well-known component supply device 36 using a stick-shaped component assembly is provided. Further, the component supply device 36 is provided on one side in the X direction of the moving path 13, and an index table 37 holding a plurality of turrets 18 to which various holders 19 are attached is provided on the other side. .

In the above configuration, prior to the mounting of the components, the multiple loop feeder 3 serving as the second component supply means is provided in advance.
The components are arranged and held in the component mounting order from the component supply device 36 using the component feeder 4 or the tape-shaped component assembly to the tray feeder 30 as the first component supply means. Next, after moving the moving body 7 of the work transfer means 3 to one end side in the X direction and engaging the engaging member 8a with the jig 2 sent out to the side of the area B adjacent to the area A, Moving object 7
Is moved toward the center of the guide 4, and the jig 2 is positioned substantially at the center of the work transfer means 3. In this state, the movable body 7 and the tray 31 of the tray feeder 30 are connected via the clutch mechanism 33, the tray 31 is moved by the movable body 7, and the component to be mounted is moved to the Y position of the holder 19 of the mounting means 14.
On the moving path in the direction. Next, the mounting means 14
Is moved to hold the component to be mounted from the storage space of the tray 31 with the holder 19. Next, the moving body 7 is moved again, and the component mounting position of the work 1 on the jig 2 is set to the mounting unit 1.
4, the holder 19 is positioned on the movement path of the holder 19 in the Y direction, and then the mounting means 14 is moved to position the holder 19 at a predetermined component mounting position of the work 1 and mount the held component. When the above component mounting operation is repeated and the component mounting on the workpiece 1 is completed, the engagement between the jig 2 and the engaging member 8a is released to move the moving body 7, and the other engaging member 8b is moved to the jig 2 Then, the moving body 7 is moved to position the jig 2 at the other end in the X direction of the area A, and the jig 2 is brought into a state where it can be conveyed by the work conveying means arranged in the adjacent area C. The body 7 returns to one end in the X direction again, and repeats the above operation. When the components stored in the tray feeder 30 are exhausted, the components are again stored in the tray feeder 30 as the first component supply unit from the second component supply unit.

[0016] Further, the component has a lead wire,
When a lead wire is inserted into a hole formed in the work 1 at the time of mounting and the lead wire is bent by the anvil 24 on the back surface, the mounting means 14 is moved to the center reference position of the work transport means 3 at the time of component mounting operation. Once, the clutch body 26 is actuated and connected to the mounting means 14, and the anvil unit 23 and the mounting means 14 are interlocked to allow the anvil 24 to bend the lead wire of the component during mounting. The anvil unit 23 is configured such that the turret 25 having the plurality of anvils 24 rotates in synchronization with the rotation of the turret 18 having the plurality of holders 19, and the anvil 24 moves up and down in synchronization with the mounting operation. Have been.

The mounting means 14 includes a pair of mounting heads 1.
6 is provided, if one of the holders 19 fails during the mounting operation using one mounting head 16, the mounting operation can be immediately continued by switching the mounting head 16 to the other. It is possible to significantly reduce the time loss in the case of a failure.

Further, when the type of the work 1 changes, the mounting means 14 is moved to the other end of the moving path 13 in the Y direction, and is replaced with another turret 18 held on the index table 37. Can be dealt with.

In the above embodiment, the clutch mechanism 33 is provided by the moving body 7 of the work transfer means 3 as the first component supply means.
Although the tray feeder 30 that performs the positioning in the X direction is illustrated by way of example, a means for driving and moving the tray feeder 30 may be separately provided. Further, the present invention is not limited to the tray feeder 30, and may be configured such that an endless belt-type component holding body having a large number of component accommodation spaces arranged in a rotatable manner is rotatable. Also, a combination of a multiple loop feeder 34 for supplying loose components and a component supply device 36 using a tape-like or stick-like component assembly has been exemplified as the second component supply means. Supply means may be used.

Further, in the above embodiment, the self-propelled type in which the mounting means 14 moves along the moving path 13 is exemplified, but in such a configuration, the moving path 13 corresponds to each component supply means. The moving path 13 having an arbitrary length according to the installation space of the component supply means by being configured to be able to be divided and coupled.
And the space in the area A can be minimized. However, a driving means such as a feed screw mechanism for driving the mounting means 14 may be provided separately from the moving path 13 of the mounting means 14.

Also, a large number of components are stored in the order of mounting,
As shown in FIGS. 5 and 6, a tray feeder for continuously mounting components over a long period of time includes a plurality of trays 31 and stores the trays 31 containing components in a stock portion 38 in a stacked state. The empty trays are sent out to the transfer section 39 and the empty trays
Is preferably used.

Also, while taking out the component from the first component supply means and mounting it, the second component is simultaneously transferred to the first component supply means by the component transfer means movable along the movement path. The components of the supply means may be selected and supplied in the mounting order.

Further, in the above-described embodiment, an example is shown in which the conveying means of the jig and the positioning means are shared. However, as shown in FIG. 7, a chain conveyor 41 is used as the conveying means of the jig 2 and the above-mentioned positioning means is used. A configuration using the feed screw shaft 5 and the moving body 7 similar to the embodiment can also be adopted. In FIG. 7, reference numeral 42 denotes a stopper for stopping the transfer of the chain conveyor at a predetermined position.

[0024]

According to the component mounting method of the present invention, as described above, components are taken out from the second component supplying means in the order of component mounting and stored in the first component supplying means. By taking out the component from the component supply means and mounting it on the workpiece, the speed of taking out the component is increased, and high-speed mounting becomes possible, thereby improving the productivity.

[Brief description of the drawings]

FIG. 1 is an overall plan view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a schematic configuration of the jig conveying means.

FIG. 3 is a perspective view showing a schematic configuration of a main part of the mounting means.

FIG. 4 is a schematic configuration diagram of a coupling mechanism between the mounting means and an anvil unit.

FIG. 5 is a perspective view of a modification of the tray feeder.

FIG. 6 is a perspective view of a modification of the tray feeder.

FIG. 7 is a perspective view showing a schematic configuration of a modification of the jig conveying means.

[Explanation of symbols]

 Reference Signs List 1 work 2 jig 3 work transfer means 13 guide rail (moving path) 14 mounting means 19 holder 30 tray feeder (first component supply means) 34 multiple loop feeder (second component supply means) 36 component supply device (Second component supply means)

Claims (1)

(57) [Claims] 1. A workpiece which can be stored and removed so as to be freely stored and taken out , and a workpiece and a workpiece held at a predetermined position can be held.
The first component supply means is configured to be movable and positionable while maintaining the relative position constant, and the second component supply means is disposed at a fixed position with respect to the workpiece and configured to take out components. A component mounting method for removing a component from a component supplying means and mounting the component on the workpiece, wherein the component is supplied from a second component supplying means before the component mounting.
Take out the parts in the order of mounting and store them in the first part supply means
The engineering and process, the component from the first component supply means for
A component mounting method comprising the steps of taking out the components stored in the order and mounting them on the work.