JPH0494598A - Component mounting device - Google Patents

Abstract

PURPOSE:To alleviate a labor by judging as end of one lot of a component containing tape when the times of no component suctions of a nozzle reach predetermined times, sucking a component of the next lot to mount when there is no mounted component. CONSTITUTION:When a printed board 15 is placed on an X-Y table 14, a component supply unit 1 for containing a chip component 2 is disposed at a suction station by the movement of a placing base 6. Then, when a suction nozzle 5 is moved by the rotation of a turntable 8 to suck the component 2, a component detection photosensor 8 detects presence or absence of the suction. Then, when the times of no continuous component suctions are counted by a counter and the counted times reach predetermined times of n times or less, it is judged that one lot of the component 2 having the same characteristics as those of a tape 4 is finished. Further, if there is no mounted component of one set having the same characteristic on the board 15, it is so controlled that the nozzle 5 sucks the component 2 from next lot of the tape 4 to mount it on the board 15.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field The present invention is a method for sucking a plurality of chip parts having the same characteristics onto a printed circuit board by using a suction nozzle. The present invention relates to a component mounting device for mounting.

(b) Prior art A component mounting device for mounting a plurality of chip components having the same characteristics onto a printed circuit board as a set was disclosed in Japanese Patent Application Laid-Open No. 61-1999.
It is disclosed in Japanese Patent No. 161000. According to this conventional technology, in a tape in which parts ranked according to the same characteristics are stored in lots, the number of parts stored in each lot is stored in advance, and the number of parts stored in each lot is stored in advance, and the number of parts stored in each lot is stored in advance, and the number of parts stored in each lot is stored in advance. By reducing the number and managing the remaining number, it is possible to determine when a lot is finished.

(c) Problems to be Solved by the Invention However, in the above-mentioned prior art, the number of parts of each lot with the same characteristics to be stored on the tape must be counted in advance and stored for each lot. The disadvantage is that it takes time for the operator to set the quantity for each unit and unit before starting the process.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to reduce the labor required by the operator before performing a component mounting operation.

(d) Means for Solving the Problems Therefore, the present invention provides a component in which a predetermined number of chip components are assembled into a set on a printed circuit board, and a plurality of chip components having the same characteristics are attached by suction with a suction nozzle. In the mounting device,
The chi/knob parts having the same characteristics are stored in each lot, and n parts (n is 2
(an integer greater than or equal to) a parts storage tape that is not stored,
a sending means for feeding the component storage tape to a position where the suction nozzle can pick up a part; a detecting means for detecting whether the nozzle has picked up a component from the tape fed to the feeding means; a counter for counting the number of times the tape could not be picked up; a determining means for determining that one lot of the tape is finished when the number of times counted by the counter reaches a predetermined number less than or equal to the n times; and the determining means When it is determined that one lot of the tape is finished, if there are no parts installed on the board among a set of parts having the same characteristics, the suction nozzle will pick up the parts from the next lot of the tape and A control means for controlling the mounting on the board is provided.

(*) Effect When the suction nozzle performs a suction operation of a component from the component storage tape sent out to the delivery means, the detection means detects whether or not the nozzle has suctioned the component.

A counter counts the number of times that the component detected by the detection means is not picked up consecutively, and when the number of times counted by the counter reaches a predetermined number of times or less, a component made of a component having the same characteristics as the tape is selected. The determining means determines that the lot has been completed, and at this time, the control means causes the suction nozzle to suction components from the next lot of the tape if there is no set of components with the same characteristics mounted on the printed circuit board. control to attach it to the printed circuit board.

(f) Example An embodiment of the present invention will be described below based on the drawings.

In FIG. 1, (1) is a tape component supply device;
Chip parts (2) are stored at regular intervals and placed on a tape reel (3).
) is intermittently fed out and the parts (2) are fed to the suction nozzle (5>) at a predetermined position. They are arranged side by side on the top, and each part stores a different type of parts (2).

The mounting table (6) is capable of reciprocating in the direction in which the supply devices (1) are arranged side by side, and is capable of moving parts (
2) is made to be sucked by the suction nozzle (5). (8) is a turntable that rotates intermittently, and a plurality of (six in this example) suction nozzles (5
) are provided at equal intervals, and each time the tape (4) rotates intermittently in synchronization with the intermittent feeding of the tape (4), a predetermined position (hereinafter this position will be referred to as "one suction station") of the supply device (1) is provided. Pick up part (2).

(9) is a component detection photosensor that detects the presence or absence of component (2), suction station and turntable (8)
A suction station provided between the stop position of the next nozzle (5) due to intermittent rotation detects whether or not the suction nozzle (5) has suctioned the component (2). (10) is a positioning unit that positions the component (2) to be picked up by the suction nozzle (5), and is installed at the second stop position of the suction nozzle (5) from the suction station (hereinafter referred to as "positioning station"). It is being

The component (2) positioned by the positioning unit (10) is moved in An XY table that moves in the direction (1
4) It can be attached to the printed circuit board (15) placed above. The suction nozzle (5) passes through the next two stopping positions of the mounting station and reaches the suction station, where it suctions the component (2).

The types of parts (2) that can be accommodated on the tape (4) sent out by the supply device (1) are the same within the same tape. However, even if they are of the same type, they may have different characteristics, such as various diodes or transistors.
There are some varieties that must be installed as a set. Parts (2) of this type are hereinafter referred to as "one set of parts".

In FIG. 2, the supply device (1) is inside the tape (4).
) is positioned below the suction nozzle (5) of the suction station every time the tape (4) is fed intermittently, and a row of parts storage areas (17) are provided for placing and storing the parts (2). . Parts of varieties whose characteristics must be distinguished (
2) are stored in the parts storage (17) consecutively for each lot of parts (2) with the same characteristics, and the parts storage (17) for four parts is emptied between lots of parts (2) with different characteristics. I have to.

In FIG. 3, (19) is the CPU, -RAM (
Data stored in 20), suction miss counter (21)
, attachment counter (22) and interface (23)
The operation related to suction and mounting of the component (2>) is controlled based on information from the component detection photosensor (9) and the like via the component (2).

The turntable servo motor (25) intermittently rotates the turntable (8), and the mounting table servo motor (26) rotates the mounting table (8) intermittently.
The positioning motor (27) drives the positioning operation of the positioning unit (10), and is controlled by the CPU (19) via the drive circuit (28).

NC data as shown in Fig. 4 is stored in RAM (20), and R is placed on the printed circuit board (10) at the position indicated by the X and Y data in the order of the steps of this NC data.
Part (2) of the type indicated by the data can be installed. The "S" in the control command indicates that the parts (2) in the step to which this data is attached must be of the same type and have the same characteristics, that is, they are the aforementioned assembled parts. . R data is parts supply device (1)
It is attached to each.

Inside the RAM (20), as shown in Fig. 3, an assembly component presence/absence shift register (30) having three memory sections is provided, and a component detection photosensor (9) detects the presence or absence of the component (2). "11" is stored in the first memory section if the component is present, and "0" is stored in the first memory section if the component is absent. 1
When the above data is stored in the second memory section, the data that was stored in the first and second memory sections before detection by the sensor (9) is stored in the second and third memory sections. Stored. When the component detection photosensor (9) detects a missing component, rl is stored in the suction error counter (21) as a suction error, and when suction errors are detected continuously, “1. The number of suction errors is counted.

The mounting counter (22) is a component presence/absence shift register (
"1" is stored in the third memory part of 30),
Since "S" is stored in the hunt roll command of the NC data for the part (2) being sucked by the suction nozzle (5), if the part (2) is an assembled part, when the mounting operation of the part (2) is completed. 11" at a time, and count the number of assembled parts installed.

"4." is stored in RAM (20) as data on the number of lot switching decisions, but this data is used when empty parts between lots of parts (2) with different characteristics are stored on the tape (4) of assembled parts. The number matches the number of storage places (17).The number of installation counters (2
2) is reset to rO'' every time it becomes '2'' by 12'' which is the assembled parts number data stored in RAM (20).

The operation of the above configuration will be described below.

The printed circuit board (15) is moved to XY by a transfer means (not shown).
When placed on the child table 14), RAM (20
) First, step M1 is performed according to the NC data stored in
A component supply device (1) that accommodates the types 'R, .

Then, a rotary disk servo motor (25
) is moved by the rotation of the turntable (8) and once stopped, the suction nozzle (5) suctions the component (2) at the station.

Next, the suction nozzle (
5) moves, the component detection photosensor (9) detects the presence of the component and stores r'1. in the first memory section of the component presence shift register (30). is stored. Before the component detection photosensor (9) detects each memory section, each memory section is reset to "O4", so "0." is stored in the second and third memory sections at this time.

Furthermore, the turntable (8) rotates and the nozzle (5)
) stops at the next station and then stops at the positioning station, and the positioning section (10) positions the part (2) by rotation of the positioning motor (27). The suction nozzle (
5) arrives at the mounting station.

Then, according to the X and Y data in step M1, the X motor (12) and the Y motor (1
Due to the rotation of 3), the XY child table 14) moves and the part (
2) is installed. Since this part (2) is not a assembled part, the installation counter does not operate and is r□.

It remains as it is.

Going back, when the nozzle (5) that picked up the part (2) in step M1 stopped at the station next to the suction station, the next nozzle (5) stopped at the suction station, and the product type rR3 in step M2 was detected. is adsorbed.

Next, the nozzle (5) that sucks the part (2) in step M2
) passes through the photosensor (9) and the presence of the component is successfully detected, "11" is stored in the first memory section of the component presence shift register (30), and "1." is stored in the second memory section. , "0" can be stored in the third memory section. Then, component mounting is performed in the same manner.

When the suction nozzle (5) that is suctioning the part (2) in step M2 is positioned at the next station of the suction station by the rotation of the turntable (8), the next nozzle (5)
) is the type 'R+g of step M3 at the suction station.
'' part (2) is attempted to be picked up. NC-j'-Yu's hunt roll command has "S", so CPU
(19) performs control according to the flowchart in FIG. ) When trying to take out part (2) from part (
When the nozzle (5) passes through the photo sensor (9) in this state where it cannot adsorb the photo sensor (9), the photo sensor (9) cannot be adsorbed.
) detects the absence of parts and detects the presence of parts shift register (30)
"0" is stored in the first memory part of
"1." is stored in each memory section.

At the same time, the adsorption error counter (21) is set to rl, and the counter (21) is set to r4. , the CPU (19) performs an automatic replenishment operation to allow the next nozzle (5) to adsorb the type 'RIB' in step M3 again. Then, at the suction station, the suction nozzle (5) attempts to suction the component (2) from the empty component storage area (17) next to the tape (4) that has been intermittently fed to the component supply device (1), but the component ( 2) could not be picked up, the photosensor (9) detected that there was no part, and the suction error Calantuff 21) was advanced by r11.
2. Therefore, the memory portions of the component presence/absence shift register (30) are "0 yo "0"rl" in order from the first.

Since the suction miss counter (21) is smaller than "r4", the automatic replenishment operation is performed again, the suction miss counter (21) becomes "3", and the shift register (30) sequentially stores I"o, 'o, Then, the automatic replenishment operation is performed again, the suction miss counter (21) becomes "4", and the contents of the shift register (30) remain as "all memory sections are rO". Next, the suction miss counter (21)
is r4J, which is the same as the lot switching judgment number data, so after confirming that it is not larger than '4',
The CPU (19) checks the installation counter (22), but the counter (22) says ``Since it is OJ and there is no part (2) that has been installed in the assembly, it is determined that re-adsorption will be performed from a new lot.

Therefore, based on step M3, the CPU (19) picks up the part (2) of the type rR,, again.
The tape (4) of the parts supply device (1) of R,,, is allowed to be fed intermittently, and the parts (2) of the new lot are positioned at the suction station.The next nozzle (5) When the component (2) is picked up, the photosensor (9) detects the presence of the component, and the component presence/absence shift register (30) becomes "1" and "OJ""0" from the first memory section.

The next nozzle is type 'R, 6 according to the data in step 4.
Part (2) of J is picked up, and when the photo sensor (30) detects the presence of the part, the shift register (30) becomes "rl", "1", and "10" from the first memory section.

Next, the next nozzle (5) starts the part (
When the suction step 2) is performed, the shift register (30) becomes "1", "1", and "1" from the first memory section as the photosensor (30) detects the presence of the component. Immediately after this, the nozzle (5) sucking the part (2) of the type rR,, in step M3 arrives at the mounting station, and by moving the XY child table 14), the coordinates (xs , y, ), the part (2) can be completely attached.

After that, the c p U (19) determines that this mounting operation is for step M3 and that it is an assembled part from the control command (7) 'SJ, and then selects the shift register (3).
The third memory part of 0) is 11'', and the suction nozzle (5) of the mounting station corresponding to the memory part has the part (11).
Since it can be determined that 2) has been completely suctioned, the attachment counter (22) is set to 11''.

Next, after the nozzle (5) sucking the component (2) in the next step M4 attaches the component (2) at the attachment station, the CPU (19) similarly controls the attachment counter (2).
2) to step r2. shall be. Attachment counter <2
2) is r2. Then, since it becomes equal to "2" in the assembled parts number data, the mounting counter (22> is reset to rO").

When the component (2) has been mounted up to step M20 as described above, the control command "Eyo" ends the component mounting on the board (15).

Then, the board (15) is completely ejected by an unillustrated ejecting means, and the component (2) is similarly mounted on the next board (15) according to the NC data. After this, several boards (15) were mounted, and when the component (2) of step M3 was picked up on a certain board (15), the tape (4) of the type 'RIM' was just used. Parts with the same characteristics (
When the lot 2) is completed, the next nozzle (5) attempts to pick up the part (2) in step M4, but cannot pick it up, and the photosensor (9) detects the absence of the part in the same manner as described above.

Then, according to the flowchart in FIG. 5, the suction miss counter (21) is set to "1" and the component presence/absence shift register (30) is read from the first memory section.
rl" and automatic replenishment is performed, but the photosensor (9) detects that there are no parts and the suction miss counter (2)
1) is "r2" and the shift register (30) is "r2" from the first one.
0,” “0,” and “1.”

After this, the nozzle (
5) arrives at the mounting station, mounts the component (2) onto the printed circuit board (15), and counters the mounting counter (22).
) is set to "1" in the same manner as described above.

During this time, at the suction station, the part (2
), but since part (2) is missing, it cannot be picked up, and the suction miss counter (21) becomes "3" and the shift register (30) becomes "0", "0", "0" from the first part. .

Next, the nozzle (5) that arrives at the mounting station is the part (
2) is not attached, and after the attachment operation is performed, the attachment counter (22) remains at 11'' and is not incremented.

Then, automatic replenishment is performed at the suction station, and the suction miss counter (21) becomes "4.", and the memory section of the shift register (30) is also all "0".

Since the adsorption error counter (21) has become r4J, the CPU (19) checks the installation counter (22) to see if there are any installed parts.
) is checked, but since "1" is stored and there is a mounted part, data regarding step M3 is stored in the RAM (20) to determine how far this assembled part has been mounted in the set. Keep this in mind, display an error message, and stop all operations.

After that, the operator determines the installation location of the assembled part from the step number stored in the RAM (20), removes the part (2) of step M3 that has already been installed, and selects the part of type "R4" from the new lot. (2) is installed manually, and then automatic operation as described above according to the NC data is resumed.

When automatic operation is resumed, the suction miss counter (2
1) and the mounting counter (22) are reset to "0.

After this, the above-mentioned movements are carried out (, step M
3, the component (2) is being supplied to the component supply device (1), but if the suction nozzle (5) is unable to suction the component (2), the photo sensor (9) will detect that there is no component, resulting in a suction error. The counter (21) has 11. is set. Thereafter, an automatic replenishment operation is performed in the same manner as described above, and the next nozzle (5) picks up the part (2). Then, the suction miss counter (21) is reset to "0".

After this, the part (2) of 'R,,,
), but when the part (2) stored on the tape (4) is finished, the next step M3 is ''.
When trying to pick up the R, ISJ part (2), the photosensor (9) detects that there is no part and the pick-up miss counter (2)
1) is set to “1.

Then, the suction nozzle (5) performs suction operation three times, and when the photosensor (9) detects that no parts are present, the counter (21) registers r4. is set and installed counter (22)
If 'O' is selected, the CPU (19) makes a decision to re-adsorb the new lot, and the next suction nozzle (5) again performs the suction operation of the parts (2) 'R, . Then,
The photo sensor (9) detects the absence of parts again and the counter (
21) becomes 15'', an abnormality display is made and all operations are stopped. On the same day, the ``RIS'' tape (4) was replaced with a new one. In this case, the mounting counter (22) is 0 degrees and there are no mounted parts that should be memorized before displaying the error, but the adsorption counter (21) is 15 when the tape (4) ends, etc., indicating the error. When stopping the operation, if there is an assembled part that has been installed, the NC data regarding the step number is stored.

Although this embodiment has been described assuming that there is only one set of assembled parts on the same board (15), even if there are multiple sets of different types of parts (2), the suction error counter (21) and the mounting Since the counter (22) is provided for each type of assembled parts (that is, corresponding to the parts supply device (1)), it can be handled in the same way.

In addition, in this embodiment, due to suction error, the photo sensor (9)
Automatic replenishment after detecting that there are no parts is carried out by the suction nozzle (5) that immediately moves to the suction station next, but it is also possible to have it performed by the suction nozzle (5) that comes later. Since the suction error counter (21) is provided for each component supply device (1), even if a suction error occurs for a component (2) of another type, it will not be counted and will be automatically replenished or according to the steps of the NC data. Since it is counted only when a suction error occurs for parts (2) of the same type, and since the loading counter (22) is also provided for each component supply device (1), it will not be counted until the next same type of part is installed. Even if parts (2) of other types are installed, the counter (22) does not count, so the operation shown in the flowchart in Fig. 5 is realized.However, if there are multiple sets of assembled parts of the same type and the sets are different, For example, if it is not necessary to use parts (2) with the same characteristics even on the same board (15), in this embodiment, even if the parts (2) belonging to different groups are automatically replenished four times, Adsorption is 4
If the suction operation of parts (2) for automatic replenishment is not performed before the end of the suction operation, the suction error counter (21) and mounting counter (22)
It is sufficient to provide one for each line, but otherwise it is necessary to provide one for each line.

In addition, if there is only one set of assembled parts of the same type on the same board (15), when the suction error counter (21) counts "4" in this embodiment, the part (2) is not suctioned. There is no need to mount the part (2) even if there is a nozzle (5) with the same type of assembly, but if there are multiple sets of assembled parts of the same type on the same board (15), the suction error counter (21) will be "4. Nozzle (5) that is sucking the part (2) when counting
If there is, it is possible to mount the part (2) of the relevant assembly part that is attracted to the nozzle (5) until the value of the mounting counter 22) matches the value of the number of assembled parts data. .

Furthermore, if there is only one set of assembled parts of the same type on the same board (15), the mounting counter (22) may be reset every time the board (15) changes, that is, every time the NC data ends. .

In addition, in this embodiment, it was determined that it is an assembled part based on the control command data 1S, but part (2)
For each product type, assembled part discrimination data indicating whether the product type is an assembled part is stored separately from the NC data, and the parts of the NC data (
Each time the product type in 2) is specified, the assembled part discrimination data may be checked to determine whether it is an assembled part.

Furthermore, in this embodiment, the data on the number of lot switching judgments is set to be the same as the number of empty parts storage areas (17) between lots of parts (2) with different characteristics on the tape (4) of assembled parts. It may be determined that the lot is being changed by setting a convenient number in the data.

In this case, the number of empty parts storage areas (17) is stored separately, and after the suction counter (21) matches the data on the number of lot switching judgments, the empty parts that have not yet been sent to the parts supply device (1) are placed in the suction position. It is sufficient to send the parts storage area (17) without performing the suction operation and prepare for the suction of the parts/components (2) of the next lot, as shown in the flowchart in Figure 5 until the presence of parts is detected. If the suction miss counter (21) is not reset, it is possible to determine whether the component (2) on the tape (4) has ended.

Furthermore, in the case of this embodiment, six suction nozzles (5) are provided on the turntable (8), and a suction miss counter (21) is provided on the turntable (8).
) is r4. When the part (2) you are trying to pick up is in the same group as the part (2), the previous nozzle (5) has already been picked up.
The component (2) that is being suctioned has already been installed, but the number of suction nozzles (5) installed has increased, and the component (2) that has been suctioned to the previous nozzle (5) in the same group is now installed. The suction error counter (21) becomes the same as the lot change judgment number data and the mounting counter (22) becomes "0".
．． If this is the case, discard the assembly parts that have been completely suctioned without attaching them to the printed circuit board (15), and start suctioning part (2) from the first step of the assembly parts of the NC data from the new lot. good.

In addition, in this embodiment, in the tape (4) of the assembled parts, between the lots of the parts (2) with different characteristics, the parts (2) are
An empty parts storage area (17) was set up, but a parts supply device (17) was installed.
) may be left with a predetermined number of parts (2) with the same characteristics, and an empty parts storage area (17) may be provided in front of them. It is determined by the count that only a predetermined number of parts (2) with the same characteristics remain, and the parts (2) with the same characteristics that have already been picked up are
If it is possible to mount all the assembled parts by mounting the remaining parts (2) in relation to the number of parts (2), pick up the remaining parts (2) and attach the parts (2) on the remaining tape (4). ) can be discarded so that it does not stop working.

Furthermore, instead of the component detection photosensor (9) that detects a suction error of the component (2), a vacuum sensor that detects the vacuum state of the suction nozzle (5) may be used to detect a suction error.

Furthermore, in this embodiment, a so-called rotary type mounter in which parts are mounted by rotation of a turntable has been described.
The flowchart shown in Fig. 5 is also used in a component mounting device of the type in which a suction nozzle is attached to a head movable in the XY force direction, and the head moves to a component supply device to suction components and mount them on a printed circuit board. It can be made to perform an action.

Further, in this embodiment, the parts picked up by the suction nozzle are positioned by the positioning section to work on the printed circuit board. In this case, a suction error may be detected by detecting the presence or absence of a component using a camera that recognizes the positional shift of the component, instead of using a photosensor.

(G) Effects of the Invention As described above, the present invention can determine the end of one lot consisting of parts with the same characteristics based on the parts storage area where no parts are placed on the parts storage tape, so the parts mounting operation can be improved. There is no need for the operator to set data regarding the parts storage tape in order to determine the end of a lot before starting the process, which reduces labor.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a component mounting device to which the present invention is applied;
The figure is a plan view of a tape that stores chip components, Figure 3 is a control block diagram of the present invention, Figure 4 is a diagram showing NG data,
FIG. 5 is a diagram showing a flowchart. (1)... Tape component supply device (feeding means), (2
)...Chip parts, (4)...Tape (components storage tape), (5)...Suction nozzle, (9)...
Parts detection photosensor (detection means), (15)...
Printed circuit board, (19) CPU (judgment means, control means), (21) Suction miss counter (counter). Diagram

Claims (1)

[Claims] (1) In a component mounting device that attaches a set of a predetermined number of chip components having the same characteristics onto a printed circuit board by suctioning them with a suction nozzle, said chip components having the same characteristics. A parts storage tape that stores parts in each lot so that n parts (n is an integer of 2 or more) are not stored consecutively between each lot, and a position where the parts storage tape can be picked up by the suction nozzle. a detection means for detecting whether or not the nozzle has picked up a part from the tape sent to the delivery means; and a counter for counting the number of times that the nozzle has not picked up a component in succession by the detection means; a determining means for determining that one lot of said tapes has ended when the number of times counted by a counter reaches a predetermined number of times less than or equal to said n times; and when said determining means determines that one lot of said tapes has ended; control means for controlling the suction nozzle to pick up parts from the next lot of the tape and mount them on the board when there is no mounted part on the board among a set of parts having the same characteristics; A parts mounting device characterized by: