JP2591634Y2 - Electronic component automatic mounting device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a reciprocating component supply table on which a plurality of component supply units are mounted, thereby positioning an arbitrary component supply unit at a pickup nozzle take-out position. The present invention relates to an electronic component automatic mounting apparatus that takes out electronic components to be mounted and mounts them on a printed circuit board.

[0002]

2. Description of the Related Art In this type of electronic component mounting apparatus, as disclosed in Japanese Patent Application Laid-Open No. 3-145198, a component supply unit, which is a component supply unit for supplying various components, is provided side by side on a supply table. By taking a horizontal movement of the supply table, it is taken out from an arbitrary component supply device by a suction nozzle and mounted on a printed board. In such an apparatus, in consideration of a case where the parts supply device runs out of parts, a parts supply unit that supplies the same kind of parts for a unit that is likely to run out of parts is prepared as a spare for the original unit and the spare unit is provided. There is a technology to take out parts from the unit.
In this case, it is first conceivable to arrange a spare unit next to the original unit. However, usually, the parts supply units are arranged in the order in which the parts are taken out. If parts can be taken out from the original unit, the unit that supplies the next part to be taken out after taking out the parts from the original unit is the spare unit. The supply table must be moved by two units because it is located next to the unit. Also, when the original unit runs out of parts and parts are taken out of the spare unit, the supply unit must be moved by two units to jump over the original unit. It had to take that much time and the tact time had dropped. When the spare unit is arranged after all the other original units have been arranged, if the original unit has no parts running out, the spare unit is moved one unit at a time in the order of taking out parts. No waste of time because it is good to go, but if the original unit runs out of parts, take a long distance when removing parts from the spare unit after removing the parts in the previous step of the original unit. They had to move, and they had to move a long distance back to take out the parts for the next step, greatly reducing the tact time.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to prevent a reduction in tact time when a spare unit is provided when a component supply unit runs out of components.

[0004]

According to the present invention, a component supply table on which a plurality of component supply units are mounted reciprocates to position an arbitrary component supply unit at a pickup nozzle take-out position. In an electronic component automatic placement apparatus that takes out electronic components supplied by the unit and mounts the components on a printed circuit board, one of a group of originally used component supply units including the plurality of component supply units and a group of originally used component supply units. Spare parts supply unit group is provided separately without dividing the originally used parts supply unit group, and when parts are taken out from the originally used parts supply unit group, the parts are taken out in the next mounting order And after the removal of the parts from the originally used parts supply unit group, the spare parts Is provided with a control means for controlling so as to take out was component shortage from a sheet unit group component types of components.

[0005]

With the above arrangement, the control means performs the removal of the component in the next mounting order when the component is cut out of the component supply unit group, and completes the removal of the component from the component supply unit group. After that, control is performed so as to take out a part of a part type that has run out of parts from the spare parts supply unit group.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; In FIGS. 2 and 3, (1) indicates that X is driven by the X-axis servomotor (2) and the Y-axis servomotor (3).
A printed board (5) on which a chip-shaped electronic component (4) (hereinafter referred to as a chip component (4)) is mounted is placed on an XY table that is moved in the direction and the Y direction.

In (6), a plurality of component supply units (7) for supplying chip components (4) of the same type are detachably arranged at equal intervals to supply a large number of chip components (4). Component supply unit as a component supply unit
By the rotation of the ball screw (9) driven by the component supply servo motor (8), the ball screw (9) is guided by the guide (10) to
Is moved in the horizontal direction.

(11) A suction head section (1) provided with a plurality of suction nozzles (12) on its lower surface for taking out and transporting the chip component (4) from the component supply unit (7).
3) is a rotary table that is installed on the periphery of many
The rotary servo motor (14) shown in FIG. 4 rotates intermittently via an index unit (not shown). The suction head section (13) is provided corresponding to the intermittent rotation pitch.

(I) is a suction station for taking out the chip component (4) from the component supply unit (7), and a component presence / absence detecting device () for detecting whether the suction nozzle (12) has sucked the chip component (4). 15) is provided. (II) is a recognition station for recognizing the state of the chip component (4) sucked by the suction nozzle (12) by the recognition device (16).

(III) a nozzle rotation correction station for correcting the rotation of the chip part (4), which corrects the angle of the part (4) to the mounting angle based on the recognition result of the recognition device (16). To rotate the nozzle (12). (IV) is the nozzle rotation correction station (III)
Is a mounting station for mounting the chip component (4) on the printed circuit board (5) after the completion of the operation in (1).

Reference numeral (V) denotes a discharge station for discharging, for example, the chip component (4) that has been picked up as a result of recognition by the recognition device (16). (VI) is a nozzle selection station for selecting a suction nozzle (12) corresponding to the chip component (4) to be suctioned at the suction station (I), and is provided at an outer diameter portion of the suction head section (13), not shown. The desired suction nozzle (12) is selected by the rotation of the drive gear (18) by the rotation of a drive gear servomotor (not shown) which is moved by a drive system (not shown) and meshed with the gear after being engaged with the gear. Is done.

FIG. 3 (25) shows a printed circuit board (5) with X
Reference numeral 26 denotes a supply conveyor for transferring the Y-table (1) for supply, and reference numeral 26 denotes a discharge conveyor for discharging the substrate (5) on the XY table (1). In FIG.
(20) is an interface connected to the CPU (21), a component presence / absence detection device (15) and a recognition device (16).
Is connected. (22) RAM as storage device
And NC data and parts data are stored.
Reference numeral (23) denotes a ROM for storing a program relating to the mounting operation of the chip component (4) such as the program of the flowchart shown in FIG.

The data stored in the RAM (22) will be described. As shown in FIG. 5, the NC data includes the mounting position (X coordinate data, Y coordinate data) on the printed circuit board (5) and the mounting angle indicating the mounting direction for each step number indicating the mounting order of the component (4). Data (θ angle)
And a reel number indicating the number of the mounting position on the supply table (6) of the component supply unit (7) for supplying the chip component (4) to be taken out. In the case of the present embodiment, the reel numbers are assigned in order from the left side of FIG. The control command "E" indicates the end of the step.

As shown in FIG. 6, the part data is a data in which a part ID indicating a part type is stored for each reel number. The NC data and the part data shown in FIG. It is stored in the RAM (22) as data for mounting components to (5). Although the reel number is stored in the “spare” column of the part data in FIG. 6, the reel number in the “spare” column corresponding to the original unit (7) reel number column is displayed. If the CPU (21) determines that the component supply unit (7) in the column of the reel number of the original unit (7) is out of components or cannot supply the chip component (4), the spare In the column, the chip component (4) is supplied from the unit (7).
The data in the column of "1" stores data for the so-called alternate function. Therefore, when there is a component supply unit (7) for which the alternate function is desired to be activated when the component runs out, the operator vacates the unit (7) for supplying the same type of component (4) as the unit (7). A spare unit (7) is attached to the position of the reel number, and the reel number is set and stored in the spare column of the part data by keying in from an operation unit (not shown). This alternate function may be set for all units (7). However, as the number of spare units (7) increases, the weight increases and vibration occurs when the supply table (6) moves, and the life of the ball screw (9) is shortened. It is necessary to set only the unit (7), which is likely to run out of parts due to a problem such as the unit (7), which is frequently used in the NC data. Unit with a smaller number of parts stored (7)
(Even if it is new, there is a case where there is little and there is a case where there is little because it is a work in progress.).

The RAM (22) has, for each reel number, a memory indicating whether or not the alternate function is being activated, and a step number at which the component is determined to be out and the alternate function is activated and the component (4) is not mounted. A batch recovery memory that is collectively stored is provided. In the case of this embodiment, the component supply unit (7) originally used for the reel numbers "1" to "40" for the NC data of FIG.
This is a group (group A shown in FIG. 2), and "41" to "44" are spare unit (7) groups (group B shown in FIG. 2). The NC data also has 40 steps, and chip components (4) are taken out in order from the reel number “1” and “4”.
The unit is taken out from the unit (7) of "0" and finished.

The operation of the above configuration will be described below. First, when the printed circuit board (5) is transported to the supply conveyor (25) and placed on the XY table (1), it is determined that the end of the step number of the NC data is not the end according to the flowchart of FIG. Is not the step number for taking out the part (4) from the unit (7) with the reel number of "1", the part supply table (6) is moved by the drive of the part supply unit servo motor (8), and the step number of the NC data The component supply unit (7) having the reel number "1" of "1" is on standby at the component suction position of the suction station (I). With the rotation of the rotary table (11), the nozzle (12) that moves to the component pick-up position of the suction station (I) next moves at the nozzle selection station (VI) by the rotation of the drive gear (18). The part (13) is rotated and the nozzle type corresponding to the part ID "A" is selected from the part data of FIG. 6, and the suction nozzle (12) is lowered by the lowering of the suction head (13). The chip component (4) supplied by the unit (7) is taken out. The component presence / absence detection device (15) of the suction station detects the presence / absence of the component (7) of the suction nozzle (7), and it is assumed that the chip component (4) is detected as being suctioned.

Next, the suction nozzle (12) sucking the component (4) is driven by a rotary servomotor (14) to rotate the rotary table (1) at a predetermined speed suitable for the component type.
It moves to the recognition station (II) by the rotation of 1). In the recognition station (II), the recognition device (16) performs recognition of the displacement of the component (4) sucked by the nozzle (12) with respect to the suction nozzle (7) and recognition of the suction state and the like.
It is performed by

Based on the recognition result of the recognition device (16), the CPU
If it is determined that (81) is defective, the part (4) is discharged to the discharge station (V) without being mounted at the mounting station (IV). Next, when the suction nozzle (12) reaches the nozzle rotation correction station due to the rotation of the rotary table (11), the angle is adjusted to the angle specified by the NC data based on the recognition result of the recognition device (15). Then, the nozzle rotating device (17) moves the nozzle (1).
2) is rotated to perform angular positioning of the chip component (4).

Next, at the mounting station, the designated position of the NC data is positioned by the rotation of the X-axis servomotor (2) and the Y-axis servomotor (3) by the lowering of the suction nozzle (12). ) Is mounted with the chip component (4). Next, the above step number "1"
When the nozzle (12) sucking the component (4) stops at the recognition station (II), the next nozzle (12) stops at the suction station (I). After the suction of (4), during the rotation of the rotary table (11), the component supply unit (7) of the reel number "2" indicated by the step number "2" is moved to the suction station by the supply table (6). By the movement, the suction nozzle (12) moves to the component pick-up position. That is, the supply stand (6) moves by an interval of one unit (7). Thus, the suction nozzle (12) sucks the component (4) in the same manner as in the case of the step number "1", and the component (4) is sucked in the printed board (5) in the same manner as in the case of the step number "1". You.

Next, in order to pick up the component having the step number "3", the supply table (6) moves the adjacent unit (7) having the reel number "3" to the component suction position in the same manner as the case of the step number "2". Move one unit to make it move. In this way, the supply table (6) at intervals of one unit for each step number
Moves to take out the component (4), and the component is mounted on the printed circuit board (5). During this time, the supply table (6) needs to be moved by one unit, so that the rotary table (11) rotates at a high speed and the suction nozzle (12) can pick up the component without waiting, and the time required for each operation of each step number. Is short.

Such operations are repeated, and the suction and mounting operations of the chip part (4) are performed, and the step number "4" is set.
When the component mounting of “0” is completed, the control command of the NC data is “E”, so that the end of the step number is determined. Since there is no step number not mounted in the collective recovery memory, the printed circuit board (5) is transferred. And that the printed circuit board (5) is
It is discharged from the table (1) by the discharge conveyor (26), and the next substrate (5) is placed on the XY table (1).

In this way, components are successively mounted on the board (5), and the chip component (4) having the reel number "1" originally has a smaller number of components than the other units (7). If the parts run out due to a small quantity, the suction nozzle (1
In 2), the component (4) cannot be sucked, and when the component presence / absence detection device (15) detects the absence of the component (4), the component (4) is suctioned twice more. The CPU (21) judges the lack of parts and stores the reel number to which the spare unit (7) is attached in the "spare" column of the part data in FIG. 6, so that the step number "1" is stored in the collective recovery memory. Is stored in the memory in the RAM (22) to indicate that the alternate is being activated, and the operation of taking out the part (4) having the step number "2" is performed.

Next, when the unit (7) of the reel number "6" has run out of components during the mounting of the components on the same board (5) in this manner, the steps are similarly stored in the collective recovery memory. The number “6” is stored, and the reel number activates “alternate”. When the component mounting of the same board (4) is completed up to the step number "40", the component mounting operations of the step numbers "1" and "2" stored in the collective recovery memory are executed, but the step number "1" Since the spare is at the reel number "41", the supply stand (6) moves by one unit since the unit with the reel number "40" is currently at the component suction position, and the component (4) is sucked. The component (4) is sucked from the unit (7) having the reel number "43" by the next suction nozzle (12), and the component (4) is mounted on the printed circuit board (5) in the same manner as described above. .

Next, when a new board (5) is placed on the XY table (1), the batch recovery memory is cleared, but the memory indicating the activation of the alternate is not cleared, and the reel number "1" is cleared. "And" 6 "are stored to indicate that the alternate is being activated. For this reason, the nozzle selection of the step number "1" is not performed for the suction head unit (13) at the position of the nozzle selection station, but the nozzle selection corresponding to the component ID of the step number "2" to be suctioned is performed. When the nozzle (12) reaches the suction station, the unit (7) with the reel number "2" is moved to the component suction position and the component is sucked. A step number “1” is stored in the collective recovery memory.

Next, for the component mounting operation of step number "6", the operation from the nozzle selection station is not performed and the operation of step number "7" is performed. The unit (7) with the reel number "7" is moved to the component suction position by moving two units while the next suction nozzle (12) moves after the component suction from the unit (7). Let it. A step number “6” is stored in the collective recovery memory, the operation up to the step number “40” is performed, the component mounting operation of the step number in the collective recovery memory is subsequently performed, and the printed circuit board (5) is mounted. Discharge takes place.

The spare supply unit (7) is arranged next to the original group of supply units (7).
After the step of the C data is completed, there is no shortest time to take out the part (4), but the spare unit (7) is replaced with the original unit (7) although there is a time loss. It may be arranged slightly apart from the group of 7), and the supply stand (6) is one in this embodiment, but another ball screw is arranged in parallel and driven by another motor. In a configuration in which a plurality of supply tables are used by allowing the supply table to move on the same track as the supply table of the present embodiment, all of the original units (7) are disposed on one of the supply tables. A spare unit (7) of an arbitrary unit (7) among the units (7) may be arranged on another supply stand (6).

In the present embodiment, the original component supply unit group (the group A in FIG. 2 in this embodiment) does not have to arrange the units (7) in the order of the step numbers of the NC data in this embodiment.
By controlling as shown in the flowchart of FIG. 7, it is possible to prevent the tact time from falling even when there is no component exhaustion.

[0028]

As described above, in the present invention, the spare parts supply units are arranged separately without dividing the parts supply unit group to be used originally, so that the units are positioned while the parts are not cut out. The component mounting operation can be performed with the condition of the minimum movement of the supply table to perform the mounting, and if the component runs out, the mounting of the originally mounted component is completed without breaking the mounting order. Since the parts are taken out of the spare parts supply unit afterwards, a reduction in tact time can be suppressed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a flowchart of the present invention.

FIG. 2 is a plan view of the electronic component automatic mounting apparatus to which the present invention is applied.

FIG. 3 is a perspective view of the electronic component automatic mounting apparatus to which the present invention is applied;

FIG. 4 is a control block diagram of the present invention.

FIG. 5 is a diagram showing NC data.

FIG. 6 is a diagram showing part data.

[Explanation of symbols]

 (4) Chip-shaped electronic component (5) Printed circuit board (6) Component supply table (component supply unit) (7) Component supply unit (12) Suction nozzle (21) CPU (control device)

Claims (1)

(57) [Scope of request for utility model registration] 1. A component supply table on which a plurality of component supply units are mounted reciprocates to position an arbitrary component supply unit at a pickup nozzle take-out position, and the nozzle takes out an electronic component supplied by the unit. in the electronic component automatic mounting apparatus for mounting on a printed circuit board, said spare component supply unit group part of the component feeding unit group in which the component supply unit group used originally formed of the plurality of component supply units use this original original A component supply unit group to be used is separately provided without being separated, and when a component is taken out from the component supply unit group to be used originally, the component is taken out in the next mounting order and the component supply unit to be used originally The parts were out of the spare parts supply unit group after the parts were removed from the group. An electronic component automatic mounting apparatus characterized by comprising control means for controlling a component type to be taken out.