JP2547658B2 - Parts mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is a set of a predetermined number on a printed circuit board, and a plurality of chip components having the same characteristics are sucked by a suction nozzle. The present invention relates to a component mounting device to be mounted.

(B) Conventional technology A component mounting apparatus for mounting a plurality of chip components having the same kind of characteristics on a printed circuit board as a set is disclosed in Japanese Patent Laid-Open No. 61-
It is disclosed in Japanese Patent No. 161000. According to this conventional technology, in the tape in which the parts ranked according to the same characteristics are stored in each lot, the number of the stored parts in each lot is stored in advance, and each time the parts are taken out, the number is stored. It is possible to judge that the lot is finished by reducing the number and managing the remaining number.

(C) Problem to be Solved by the Invention However, in the above-mentioned conventional technology, it is necessary to previously count the number of parts having the same characteristics to be stored in the tape for each lot and store the number for each lot. There is a drawback that it takes a lot of time and labor for the operator to set the quantity for each lot before the operation.

Therefore, an object of the present invention is to reduce the labor of the operator before the component mounting operation is performed.

(D) Means for Solving the Problems For this reason, the present invention provides a set of a predetermined number on a printed circuit board, and a plurality of chip components having the same characteristics are sucked by a suction nozzle and mounted. In the mounting device, the chip parts having the same characteristics are stored in each lot, and n pieces (n is 2) are continuously provided between the lots.
(The above integer) A component storage tape that is not stored,
Sending means for sending the component storage tape to a position where the suction nozzle can suck, detection means for detecting whether or not the nozzle has picked up a component from the tape sent to the sending means, and the detecting means for continuously And a judgment means for judging the number of times that the tape is not adsorbed, a judgment means for judging the end of one lot of the tape when the number of times the counter has counted reaches the predetermined number of times n or less, and the judgment means. When it is judged that one lot of the tape has finished, if there is no mounted part of the set of parts having the same characteristics on the board, the suction nozzle picks up the part from the next lot of the tape and the board And a control means for controlling the device to be mounted on.

(E) Action When the suction nozzle performs the suction operation of the component from the component storage tape sent to the sending means, the detecting means detects whether or not the nozzle picks up the component.

The counter counts the number of times that the parts detected by the detecting means are not adsorbed continuously, and when the number of times the counter counts reaches a predetermined number of n or less, one of the parts having the same characteristics of the tape is formed. The judgment means judges that the lot is finished, and at this time, the control means sucks the suction nozzle part from the next lot of the tape when there is no set of parts having the same characteristics on the printed circuit board. Control so that it is mounted on the printed circuit board.

(F) Embodiment One embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, (1) is a tape component supply device, which stores chip components (2) at regular intervals and intermittently delivers a tape (4) wound around a tape reel (3). ) Is supplied to the suction nozzle (5) at a predetermined position. The tape component supply device (1) has a large number of mounting bases (6).
Parts lined up on top of each other and of different types (2)
Is stored.

The mounting table (6) can reciprocate in the direction in which the supply devices (1) are arranged side by side, so that the component (2) of any supply device (1) is adsorbed by the adsorption nozzle (5). Is made in. Reference numeral (8) is a turntable that rotates intermittently, and a plurality (six in this embodiment) of suction nozzles (5) are provided at equal intervals on the outer edge of the turntable for intermittent feeding of the tape (4). The component (2) is sucked at a predetermined position of the supply device (1) (hereinafter, this position is referred to as a “suction station”) every time the intermittent rotation is synchronized.

Reference numeral (9) is a component detection photosensor for detecting the presence or absence of the component (2), which is provided between the suction station and the stop position of the next nozzle (5) due to the intermittent rotation of the turntable (8). At, it is detected whether or not the suction nozzle (5) has sucked the component (2).
Reference numeral (10) is a positioning portion for positioning the component (2) to be sucked by the suction nozzle (5), and is provided at the stop position (hereinafter referred to as "positioning station") of the suction nozzle (5) second from the suction station. Has been.

Parts (2) positioned by the positioning part (10)
Is placed on the XY table (14) that moves in the XY directions by the X motor (12) and the Y motor (13) at the next stop position (hereinafter referred to as the "mounting station") of the suction nozzle (5). The printed circuit board (15) is mounted. The suction nozzle (5) reaches the suction station via the next two stop positions of the mounting station, and suctions the component (2).

The types of parts (2) housed in the tape (4) delivered by the supply device (1) are the same within the same tape.
However, some types of diodes or transistors have different characteristics even if they are of the same type, and parts (2) with the same characteristics are provided at multiple locations on a single printed circuit board (10).
There are varieties that must be installed as a set. The component (2) of such a kind is hereinafter referred to as "assembled component".

In FIG. 2, each time the feeding device (1) intermittently feeds the tape (4), the tape (4) is positioned below the suction nozzle (5) of the suction station and the part (2) is placed in the tape (4). The parts storage (17) for placing and storing is lined up. Parts (2) of different types whose characteristics must be distinguished are stored consecutively in the parts storage (17) for each lot of parts (2) with the same characteristics, and between parts with different characteristics (2) lots. The parts storage area (17) for four pieces is empty.

In FIG. 3, (19) is a CPU, data stored in the RAM (20), a suction error counter (21), a mounting counter (22), and a component detection photosensor (9) via an interface (23), etc. The information related to the suction and mounting of the component (2) is controlled by the information from the above.

The turntable servomotor (25) intermittently rotates the turntable (8), the mounting table servomotor (26) drives the movement of the mounting table (6), and the positioning motor (27) positions the positioning unit (10). The operation is driven, but each is controlled by the CPU (19) via the drive circuit (28).

NC data as shown in Fig. 4 is stored in the RAM (20), and the product type indicated by the R data at the position indicated by the X and Y data on the printed circuit board (10) in the order of the NC data steps. The component (2) is attached. "S" of the control command indicates that the parts (2) of the step to which this data is added must be parts (2) of the same type and the same characteristics, that is, the above-mentioned assembled parts. . The R data is attached to each component supply device (1).

As shown in FIG. 3, the RAM (20) is provided with an assembly component presence / absence shift register (30) having three memory units, and when the component detection photosensor (9) detects the presence or absence of the component (2). , "1" is stored in the case where there is a component, and "0" is stored in the first memory unit when there is no component. When the above data is stored in the first memory unit, the data stored in the first and second memory units before the detection of the sensor (9) is stored in the second and third memory units. Is stored. The suction error counter (21) stores "1" as a suction error when the component detection photosensor (9) detects that there is no component, and advances "1" by 1 when the suction error is continuously detected. The number of adsorption mistakes is counted.

The mounting counter (22) stores "1" in the third memory section of the component presence / absence shift register (30),
If the component (2) attracted to the suction nozzle (5) is an assembled component because "S" is stored in the control command of the NC data, when the mounting operation of the component (2) ends, " The number of assembled parts is counted by incrementing by 1 ".

“4” is stored in the RAM (20) as the lot switching determination count data, and this data is stored in the empty parts storage space between the lots of the parts (2) having different characteristics on the tape (4) of the assembled parts. Consistent with the number in (17). The wearing counter (22)
"2", which is the number of assembly parts data stored in the RAM (20)
Thus, it is reset to "0" every time it becomes "2".

The operation will be described below with the above configuration.

When the printed circuit board (15) is placed on the XY table (14) by a transfer means (not shown), a part that stores the type "R ₁₀ " of step M1 according to the NC data stored in the RAM (20). The feeding device (1) is mounted on the mounting table servo motor (2
The mounting table (6) is moved by the rotation of (6) to be positioned at the suction station.

Then, turntable servo motor (2
The suction nozzle (5), which is moved by the rotation of the turntable (8) by the rotation of (5) and stopped once, sucks the component (2) at the station.

Next, when the suction nozzle (5) moves due to the rotation of the turntable (8), the component detection photosensor (9) detects the presence of a component, and "1" is stored in the first memory section of the component presence / absence shift register (30). Is stored. Before detection by the component detection photosensor (9), each memory unit is reset to "0", so "0" is stored in the second and third memory units at this time.

Further, the turntable (8) rotates, the nozzle (5) temporarily stops at the next station, and then stops at the positioning station, and the positioning motor (27) rotates so that the positioning section (10) causes the part (2) to move. ) Is positioned. By the next rotation of the turntable (8), the suction nozzle (5) arrives at the mounting station.

Then, the X motor (12) and the Y motor (13) are rotated so that the coordinates (X ₁ , Y ₁ ) of the printed circuit board (15) become the stop position of the suction nozzle (5) according to the X, Y data of step M1. This moves the XY table (14) and mounts the component (2). Since this component (2) is not a combined component, the mounting counter does not operate and remains "0".

Going back, when the nozzle (5) that picked up the component (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 "R" of step M2 ₃ ”is adsorbed.

Next, when the nozzle (5) for sucking the component (2) in step M2 passes through the photo sensor (9) and the presence of the component is detected, the "memory" of the component presence / absence shift register (30) stores ""1" is stored and "1" is stored in the second memory section.
Is stored, and “0” is stored in the third memory unit.
Then, component mounting is performed in the same manner.

When the suction nozzle (5) sucking the component (2) of step M2 is located at the station next to the suction station by the rotation of the turntable (8), the next nozzle (5) moves to the step M3 at the suction station. Attempts to pick up part (2) of the product type "R ₁₅ ". Since there is an “S” in the NC data control command, the CPU (1
9) controls according to the flowchart of FIG.
At this time, the lot of parts (2) with the same characteristics is finished, and the first part (1) of the four empty parts parts (17)
When attempting to take out component (2) from 7), component (2) cannot be adsorbed. In this state, when the nozzle (5) passes through the photo sensor (9), the sensor (9) detects that there is no component, and "0" is stored in the first memory section of the component presence / absence shift register (30). "1" is stored in each of the second and third memory units.

At the same time, "1" is set to the suction error counter (21), and since the counter (21) is smaller than "4" of the lot switching determination count data, the CPU (19) moves to the next nozzle (5). The automatic replenishment operation is performed again to attract the product type "R ₁₅ " of step M3. Then, in the suction station, the suction nozzle (5) tries to suck the component (2) from the empty component storage space (17) next to the tape (4) intermittently fed to the component supply device (1). 2) cannot be adsorbed, the photo sensor (9) detects that there is no component, the adsorption error counter (21) is incremented by "1" and becomes "2", and the memory section of the component presence / absence shift register (30) sequentially from the first. It becomes "0""0""1".

Since the adsorption error counter (21) is smaller than "4", the automatic replenishment operation is performed again, the adsorption error counter (21) becomes "3", and the shift register (30) sequentially becomes "0""0" from the first. It becomes "0". Then, the automatic replenishment operation is performed again, the adsorption error counter (21) becomes "4", and the contents of the shift register (30) remain "0" in all the memory units. Next, the adsorption error counter (21) became "4", which was the same as the lot switching determination count data.
After confirming that it is not larger than “4”, the CPU (19) checks the mounting counter (22), but the counter (2
Since 2) is “0” and there is no part (2) with the assembled parts already mounted, it is determined to perform re-adsorption from the new lot.

Therefore, based on step M3, the CPU (19) intermittently feeds the tape (4) of the component supply device (1) of the product type "R ₁₅ " to attract the component (2) of the product type "R ₁₅ " again, Place the lot of parts (2) at the suction station. The next nozzle (5) is a product type "R" at the adsorption station.
_{When the} " ₁₅ " component (2) is adsorbed, the photo sensor (9) detects the presence of the component and the component presence / absence shift register (30) becomes "1""0""0" from the first memory section.

The next nozzle is the product type “R ₁₅ ” according to the data in step 4.
The component (2) of No. 2 is sucked, and the detection of the presence of the component of the photo sensor (30) causes the shift register (30) to become "1""1""0" from the first memory section.

Next, when the next nozzle (5) sucks the component (2) according to step M5, the shift register (30) detects "1" or "1" from the first memory unit by the detection of the presence of the component by the photo sensor (30). 1 ”becomes“ 1 ”. Immediately after this, the nozzle (5) sucking the component (2) of the product type "R ₁₅ " of step M3 arrives at the mounting station, and the XY table (1
By the movement of 4), the component (2) is mounted on the coordinates (X ₃ , Y ₃ ) of the printed circuit board (15).

After that, the CPU (19) determines that this mounting operation is the one in step M3 and that it is an assembly component based on the control command "S", and the third memory unit of the shift register (30) is "1". There, it is possible to determine that the component (2) has been sucked by the suction nozzle (5) of the mounting station corresponding to the memory section, so the mounting counter (22) is set to "1".

Next, after the nozzle (5) sucking the component (2) in the next step M4 mounts the component (2) at the mounting station, the CPU (19) similarly sets the mounting counter (22). Step to "1" and set to "2". When the mounting counter (22) becomes "2", the mounting counter (22) is reset to "0" because it becomes equal to "2" of the assembled component number data.

When the component (2) is mounted up to step M20 as described above, the component mounting on the board (15) is completed by the control command "E".

Then, the board (15) is ejected by an ejecting means (not shown), and the component (2) is similarly mounted on the next board (15) according to the NC data. After this, several boards (15) are mounted, and step M3 of a certain board (15) is performed.
When the part (2) of the same characteristic is finished with the tape (4) of the product type "R ₁₅ " when the part (2) of No. 2 is sucked, the next nozzle (5) is the part of step M4. The photosensor (9) detects that there is no component in the same manner as described above because the photosensor (9) cannot be adsorbed due to the adsorption.

Then, according to the flowchart of FIG. 5, "1" is set in the suction error counter (21), and the component presence / absence shift register (30) reads "0""1" from the first memory section.
It becomes "1". Then, the automatic replenishment is performed, but the photo sensor (9) detects that there is no component and the suction error counter (2
1) becomes "2" and the shift register (30) becomes "0""0""1" from the first.

After this, the nozzle (5) that has adsorbed the component (2) of step M3 arrives at the mounting station, mounts the component (2) on the printed circuit board (15), and mounts the counter (22).
Is set to "1" in the same manner as described above.

During this period, the suction operation of the component (2) in step M4 is performed in the suction station, but since there is no component (2), the suction cannot be performed and the suction error counter (21) is set to "3". It becomes "0""0""0".

The nozzle (5) arriving at the mounting station next time does not mount the component (2), and after the mounting operation is performed, the mounting counter (22) remains "1" and is not stepped.

Then, in the adsorption station, automatic replenishment is performed, the adsorption error counter (21) becomes "4", and the memory section of the shift register (30) is also all "0". Since the suction error counter (21) has become "4", check if there are already mounted parts.
The CPU (19) checks the data of the mounting counter (22), but since "1" is stored and there is a mounted component, it is possible to determine how far this assembled component has been mounted in the set. Is stored in the RAM (20) to be remembered, an error is displayed and all operations are stopped.

After that, the operator determines the mounting location of the assembled component from the step number stored in the RAM (20), removes the component (2) of step M3 which has already been mounted, and selects the product of the type "R ₁₅ " from the new lot. The component (2) is mounted manually, and then the above-mentioned automatic operation according to the NC data is restarted.

When the automatic operation is restarted, the suction error counter (21) and the mounting counter (22) are reset to "0".

After this, the operation as described above is continued, but
The component (2) is supplied to the component supply device (1) by M3, but if the suction nozzle (5) cannot suck the component (2), the photo sensor (9) detects that there is no component, so a suction error occurs. "1" is set to the counter (21). After that, the automatic replenishing operation is performed in the same manner as described above, but the next nozzle (5) sucks the component (2). Then, the suction error counter (21) is reset to "0".

After that, the component (2) of the “R ₁₅ ” is adsorbed by the adsorption nozzle (5), but when the component (2) stored in the tape (4) is finished, the “R ₁₅ ” component (2) is next processed in “M15”. When trying to pick up part (2) of "R ₁₅ ", the photo sensor (9) detects that there is no part and pick-up error counter (21)
Is set to "1".

Then, the suction nozzle (5) performs suction operation three more times, and when the photo sensor (9) detects that there is no component three times, the counter (21) is set to "4" and the mounting counter (22) is set to "0". Therefore, the CPU (19) determines to perform re-adsorption from the new lot, and the next adsorption nozzle (5) performs the adsorption operation of the component (2) of "R ₁₅ " again. Then, the photo sensor (9) again detects the absence of parts and detects the counter (2
Since 1) is "5", an error is displayed and all operations are stopped. After this, the worker will replace the "R ₁₅ " tape (4) with a new one. In this case, the mounting counter (22) is "0" and there is no mounted assembled component to be stored before the abnormal display, but the suction counter (21) becomes "5" when the tape (4) is finished and the abnormality occurs. When displaying and stopping the operation, if there is a mounted component, the NC data for that step number is stored.

Although the present embodiment has been described on the assumption that there is only one set of components on the same substrate (15), even if there are a plurality of components (2) of different types, the suction error counter (21) and mounting Since the counter (22) is provided for each type of assembled component (that is, corresponding to the component supply device (1)), it can be similarly handled.

Further, in the present embodiment, the automatic replenishment after the photo sensor (9) detects that there is no component due to a suction error is performed by the suction nozzle (5) moving to the suction station immediately next. Even if the suction nozzle (5) is used later, since the suction error counter (21) is provided for each component supply device (1), the suction error of the other types of components (2) may occur. Even if a pick-up error occurs with respect to a component (2) of the same product type that has been automatically replenished or has followed NC data steps, the mounting counter (22) also counts the component supply device (1 ), The counter (22) does not count even if another type of component (2) is mounted until the next same type is mounted, so that the operation of the flowchart of FIG. 5 is realized. . However, in the present embodiment, when it is not necessary to use the component (2) having the same characteristics even in the same substrate (15) if there are a plurality of component parts of the same type and the groups are different, Even if it is automatically replenished 4 times, the suction of parts (2) belonging to different sets is
Unless the suction operation of the component (2) for automatic replenishment is completed once, one suction error counter (21) and one mounting counter (22) are provided for each product type, that is, for each component supply device (1). However, if not, it is necessary to provide it for each group.

Further, when there is only one set of the same type of assembled component in the same substrate (15), when the adsorption error counter (21) counts "4" in the present embodiment, the component (2) is adsorbed. It is not necessary to mount the component (2) even if there is an existing nozzle (5), but if there are multiple assembled components of the same type on the same substrate (15), the suction error counter (21) will be "4". If there is a nozzle (5) that is sucking the component (2) when the number is counted, the nozzle (5) sucks until the value of the mounting counter (22) matches the value of the assembled component number data. It is possible to mount the component (2) of the relevant assembled component.

Further, when there is only one set of the same type of assembled components in 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.

Further, in the present embodiment, it is determined by the data "S" of the control command that the component is an assembled component. For each product of the component (2), the assembled component identification data indicating whether the product is an assembled component is NC data. It may be stored separately, and each time the type of the component (2) in the NC data is designated, the assembled component discrimination data may be checked to determine whether it is an assembled component.

Furthermore, in this embodiment, the number of times of determination of lot switching is the same as the number of empty parts storage spaces (17) between lots of parts (2) of different characteristics on the tape (4) of the assembled parts. A small number may be set in the data to determine that the lot is switched.

In this case, the number of empty parts storage areas (17) is stored separately, and after the suction counter (21) matches the lot switching determination count data, the empty space has not been sent to the parts supply device (1) yet. It suffices to send the parts storage area (17) of No. 1 without performing the suction operation, and prepare for the suction of the next lot's component (2). Until the presence of a component is detected as in the flow chart of FIG. If the miss counter (21) is not reset, the end of the component (2) in the tape (4) can be determined.

Further, in the case of this embodiment, the turntable (8) is provided with six suction nozzles (5) and the suction failure counter (2
When 1) becomes "4", the part (2) of the same set as the part (2) to be picked up has already been attached to the nozzle (5). However, the number of suction nozzles (5) installed is large and the suction mistake counter (21) determines lot switching because the component (2) suctioned to the previous nozzle (5) of the same group is not installed. If it becomes the same as the number of times data and the mounting counter (22) remains "0", the sucked assembly parts are discarded without mounting on the printed circuit board (15), and the first assembly part of NC data from the new lot. The component (2) may be sucked from the step of.

In the present embodiment, an empty parts storage space (17) for the parts (2) is provided between the lots of the parts (2) having different characteristics on the tape (4) of the assembling parts. ), A predetermined number of parts (2) having the same characteristics may be left and an empty parts storage space (17) may be provided in front of them. In this case, a suction error due to the empty parts storage space (17) may occur. It is determined that a predetermined number of parts (2) with the same characteristics remain by counting the number of parts, and the remaining parts (2) are attached in relation to the number of parts (2) with the same characteristics that have already been adsorbed. For example, if all the assembled parts can be installed, the corresponding parts (2)
The component (2) on the remaining tape (4) can be discarded so as not to stop the operation.

Further, instead of the component detection photosensor (9) that detects the suction error of the component (2), the suction error may be detected by a vacuum sensor that detects the vacuum state of the suction nozzle (5).

In addition, although the present embodiment has described the so-called rotary mounter in which components are mounted by rotating the turntable, the suction nozzle is attached to a head that is movable in the XY directions, and the component supply device is attached by the movement of the head. It is possible to perform the operation of the flowchart of FIG. 5 even in a component mounting apparatus of a type that moves to pick up a component and mount it on a printed circuit board.

Furthermore, in the present embodiment, the case where the component sucked by the suction nozzle is positioned by the positioning unit and mounted on the printed circuit board has been described. Even when the components are mounted on the printed circuit board by recognizing them by using, and correcting the positional deviation, the operation of the flowchart of FIG. 5 is performed similarly to the present embodiment. In this case, the suction error may be detected by detecting the presence / absence of the component by a camera that recognizes the displacement of the component without using a photosensor to detect the suction error.

(G) Effect of the Invention As described above, according to the present invention, it is possible to determine the end of one lot consisting of components having the same characteristics by the component storage area where the components of the component storage tape are not placed. It is not necessary for the operator to set the data relating to the component storage tape in order to determine the end of the lot before the operation is performed, and the labor is reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a component mounting apparatus to which the present invention is applied, FIG. 2 is a plan view of a tape for storing chip components, FIG. 3 is a control block diagram of the present invention, and FIG. 4 is a diagram showing NC data. ,
FIG. 5 is a diagram showing a flowchart. (1) ... Tape component supply device (delivery means), (2) ...
… Chip parts, (4) …… tape (parts storage tape),
(5) -Suction nozzle, (9) -Component detection photosensor (detection means), (15) -Printed circuit board, (19)-
CPU (judgment means, control means), (21) ... adsorption failure counter (counter).

Claims (1)

(57) [Claims] 1. A component mounting apparatus for mounting a predetermined number of chip components on a printed circuit board by a suction nozzle to mount a plurality of chip components having the same properties, wherein the chip components have the same properties. A component storage tape in which chip components are stored in each lot and n components (n is an integer of 2 or more) are not continuously stored between the respective lots, and the component storage tape is sucked by the suction nozzle. Delivery means for delivering to a possible position, detection means for detecting whether or not the nozzle has adsorbed a component from the tape delivered to the delivery means, and a counter for counting the number of times the detection means does not adsorb continuously And the number of times the counter counts is n
A judgment means for judging the end of one lot of the tape when a predetermined number of times equal to or less than a predetermined number of times has been reached, and a means for making the substrate have the same characteristics when the judgment means judges the end of one lot of the tape. When there is no mounted component out of the set of components, a control means for controlling the suction nozzle to suck the component from the next lot of the tape and mount it on the substrate is provided. apparatus.