JP2000255770A - Electronic component detection device - Google Patents

Abstract

(57) [Summary] To provide an electronic component detection device capable of confirming whether or not an electronic component exists at a suction position. SOLUTION: A component supply device 9 in which electronic components 4 are arranged in a matrix on a tray 5, a moving unit 7 which moves to a suction position on the component supply device and takes out the electronic components,
A height sensor 20 attached to the moving unit, and a storage means 2 storing height data of the component supply device at the suction position.
6, when the moving unit moves to the suction position on the component supply device on which the electronic component is mounted to take out the electronic component, the signal from the height sensor is taken in and compared with the height data stored in the storage means. Then, a recognition unit 25 for recognizing the presence of the electronic component is provided, and when the presence of the electronic component is not recognized, the moving unit is moved to a predetermined next suction position on the component supply device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electronic component detection device.

[0002]

2. Description of the Related Art In an electronic component mounting apparatus for mounting electronic components on a circuit board, an electronic component supply device for sequentially supplying electronic components to predetermined positions is used. This electronic component supply device includes a tray system in which a large number of electronic components are arranged in a matrix on a tray, and a tape or belt that supports a large number of electronic components at regular intervals is intermittently fed at regular intervals. There is known an intermittent feeding method for supplying a sheet.

FIG. 6 shows an example of a conventional tray-type component supply apparatus. The component supply device 9 includes a stacker 3 in which a plurality of tray bases 2 that can be pulled out in the Y direction by the tray pullout unit 1 are stored in a stacked state, and the stacker 3 is a stacker lifting unit 6 that can move up and down in the Z direction.
Up and down. Further, on each tray base 2, a tray 5 in which a large number of electronic components 4 are arranged vertically and horizontally in a matrix is placed.

In order to take out the electronic component 4 from the tray 5 and mount it on the circuit board, the stacker elevating unit 6 moves the stacker 3 to a target position in the Z direction. Pull out the target amount in the Y direction. Next, the moving unit 7 moves to the target position (suction position) in the X direction, and moves the component suction nozzle 8 onto the target electronic component 4 of the tray 5 placed on the tray base 2. Here, the component suction nozzle 8 descends, sucks the electronic component 4 by suction of air, and takes it out of the tray 5.

FIG. 7 shows an example of a conventional intermittent feed type component supply apparatus. In the component supply device 19, the electronic components 4 are supported at regular intervals on a feeder 15 such as a number of tapes or a belt conveyor. Each feeder 15 is intermittently fed by an intermittent feed mechanism (not shown), and the electronic components 4 are sequentially fed to the left in the figure.

The suction position is substantially at the left end of each feeder 15, and the moving unit 7 moves to the suction position in the X direction, and moves the component suction nozzle 8 above the electronic component 4 placed on the feeder 15. Here, the component suction nozzle 8 descends, sucks the electronic component 4 by suction of air, and takes it out of the feeder 15. After the electronic component 4 is taken out, the next electronic component 4 is intermittently fed to the suction position by the intermittent feed mechanism of each feeder 15.

The circuit board 17 on which the electronic component 4 is mounted has a Y
Is transported along the transport path 16 in the direction. Mobile unit 7
After the electronic component 4 is sucked by the component suction nozzle 8, the electronic component 4 is moved in the X direction to a predetermined position (mounting position) on the circuit board 17 and the electronic component 4 is mounted at the mounting position.
This is the same for the tray type component supply device 9.

[0008]

However, in the conventional electronic component mounting apparatus, the component suction nozzle 8 is mounted on the electronic component 4.
It was not possible to recognize the presence of the electronic component 4 at the stage before the suction. For this reason, for example, when a component shortage occurs, a new tray 5, a feeder 15, or a used tray 5
If it is replaced, there may be no component at the suction position. As described above, even when the electronic component 4 is not present at the suction position, the component suction nozzle 8 performs the suction operation, and as a result, a suction error occurs. Alternatively, the operator moves the electronic component 4 to the suction position.
May not be supplied unless it is supplied.

FIG. 8 shows the order in which electronic components are taken out of the tray 5, and the electronic components are taken out in the order shown by the arrow lines. FIG. 9 shows how to count the number of remaining electronic components on the tray 5 (each numeral indicates a component number).
The remaining number is first input by the operator, and the number of remaining electronic components on the tray 5 is reduced before the component supply device 9 supplies the electronic components. Therefore, when trying to use the used tray after the setup change or when parts run out, the operator has to confirm whether or not the number of remaining trays matches the remaining number at the end of the previous production.

Further, the electronic component 4 may drop during the movement of the moving unit 7 from the suction position to the mounting position. Further, the moving unit 7 transfers the electronic component 4 to the circuit board 17.
After the operation of mounting the electronic component 4 on the electronic component 4 is completed, the electronic component 4 may be brought back to the component suction nozzle 8 by suction pressure of air. In such a case, a circuit board 17 on which the electronic component 4 to be mounted is not mounted is produced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide an electronic component detection device capable of confirming the presence or absence of an electronic component at a suction position.

Another object of the present invention is to provide an electronic component detecting apparatus which does not cause a suction error by not performing a suction operation by the component suction nozzle 8 when the electronic component 4 is not present at the suction position. The purpose is to provide.

[0013] Another object of the present invention is to allow an operator to determine whether or not the number of remaining trays at the end of the previous production is equal to the number of remaining trays even when attempting to use a used tray after setup change or when parts run out. An object of the present invention is to provide an electronic component detection device that does not need to be confirmed.

It is still another object of the present invention to provide an electronic component detecting device capable of easily finding a circuit board on which an electronic component to be mounted is not mounted.

[0015]

According to the present invention, there is provided a component supply apparatus in which electronic components are arranged in a matrix on a tray, and the electronic component is moved to a suction position on the component supply apparatus. A mobile unit for taking out electronic components,
A height sensor attached to the moving unit, storage means for storing height data of the suction position, and a moving unit at a suction position on a component supply device on which the electronic component is mounted for taking out the electronic component. And a recognizing means for recognizing the presence of the electronic component by taking in a signal from the height sensor when it moves and comparing the signal with the height data stored in the storage means. The electronic component detection device is characterized in that the moving unit is moved to a predetermined next suction position on the component supply device when the electronic component is detected.

Further, according to the present invention, a component supply device supporting a large number of electronic components at regular intervals, intermittent feeding means for intermittently feeding electronic components of the component supply device one by one to a suction position, and the component supply device A moving unit that moves to the upper suction position to take out the electronic component, a height sensor attached to the moving unit, a storage unit that stores height data of the suction position, and an electronic device that takes out the electronic component. When the moving unit moves to the suction position on the component supply device on which the component is mounted, a signal from the height sensor is taken in, and the presence of the electronic component is recognized by comparing the signal with the height data stored in the storage unit. And an intermittent feeding means for intermittently feeding the next electronic component accommodating position by the intermittent feeding means when the presence of the electronic component is not recognized. Out apparatus is provided.

Further, according to the present invention, a component supply device supporting a large number of electronic components, an electronic component taken out from the component supply device, moved to a mounting position on a circuit board, and mounted on the mounting position A moving unit, a height sensor attached to the moving unit, a storage unit storing height data of the mounting position, and a mounting operation of the electronic component to the mounting position on the circuit board is completed. An electronic component detection device, further comprising: a recognition unit that recognizes the presence of the electronic component by taking in a signal from the height sensor and comparing the signal with the height data stored in the storage unit. Provided.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a main part of an electronic component detection device according to an embodiment of the present invention, and FIG. 2 is a control block diagram of the electronic component detection device according to the embodiment of the present invention. In these figures, reference numeral 7 denotes a moving unit (head), and the moving unit 7 is a motor (X
Motor) 28 and a motor (Y motor) 30 for moving in the Y direction
X by a head driving mechanism (not shown) using
It is possible to move in the Y direction.

Below the moving unit 7, a component suction nozzle 8 is provided with the nozzle tip directed downward. In addition, a height sensor 20 is provided on a side portion of the moving unit 7 with its detection unit facing downward.

The component suction nozzle 8 can be moved in the Z direction by a nozzle driving mechanism (not shown) using a motor (Z motor) 32 for moving in the Z direction as a driving source. By driving an air suction device (not shown), the component suction nozzle 8 sucks air from a suction port at the tip of the nozzle, and can suck and hold the electronic component 4 at the tip of the nozzle by the suction force.

The height sensor 20 has a light emitting portion 21 composed of an LED (light emitting diode) and a light receiving portion 22 composed of a PD (photodiode), and is emitted from the light emitting portion 21 to be measured (in the example shown, the electronic component 4). By detecting the light reflected and returned by the light receiving unit 22 at the light receiving unit 22, the distance to the object to be measured can be detected.

In FIG. 2, the control system of the electronic component detecting device includes a height sensor 20, an I / O device 24, a CPU 25, a memory 26, an X motor driver 27, an X motor 28, a Y motor driver 29, a Y motor 30, and a Z motor. Motor driver 3
1. A Z motor 32 is provided.

The output of the height sensor 20 is an I / O device 24
The signal from the height sensor 20 is input to the CPU 25 via the I / O device 24.

The I / O device 24 further includes an X position signal and a Y position signal from an encoder provided in a head drive mechanism, and a Z position signal from an encoder provided in a nozzle drive mechanism.
Position signals are input, and these position signals are input to the I / O device 2.
4 to the CPU 25. The X position signal and the Y position signal are signals for detecting the XY position of the moving unit 7, and the Z position signal is a signal for detecting the Z position of the component suction nozzle 8.

In the memory 26, data on the suction position when the electronic component 4 is sucked from the component supply device and the height of the suction position, the mounting position when the electronic component 4 is mounted on the board, and the height of the mounting position Is stored.

The CPU 25 checks the position of the moving unit 7 and the height of the component suction nozzle 8 based on each position signal, and based on the position data and the height data in the memory 26, the X motor driver 27 and the Y motor driver 29. , Z
A drive signal is given to each of the motor drivers 31. Each of the motor drivers 27, 29, and 31 drives the X motor 28 and the Y motor 30 of the head driving mechanism and the Z motor 32 of the nozzle driving mechanism based on a driving signal from the CPU 25.

As a result, the moving unit 7 and the component suction nozzle 8 are separately driven, and the electronic component 4 on the electronic component supply device is sucked and held by the component suction nozzle 8.
The electronic component 4 is lifted by raising the component suction nozzle 8,
Thereafter, it is possible to move the moving unit 7 in the X and Y directions to move the electronic component 4 to a predetermined mounting position on the circuit board, and lower the component suction nozzle 8 at that position to mount the electronic component 4 on the circuit board. Becomes

FIG. 3 shows an example in which the electronic component detection device shown in FIGS. 1 and 2 is applied to a tray type component supply device 9 and a transport path 16. This component supply device 9 is a component according to the conventional example shown in FIG. Since it is the same as the supply device 9, its description is omitted. In addition to the Y motor 30 and the Z motor 32 shown in FIG. 2, a separate Y motor and a Z motor (not shown) are used to move the tray drawer unit 1 in the Y direction and move the moving unit 7 in the Z direction. Provided.

When the moving unit 7 moves to the suction position on the tray 5 and the height sensor 20 is positioned above the suction position, the CPU 25 fetches the height signal from the height sensor 20 and stores the value in the memory. The height data at the suction position stored in 26 is compared with the height data. When the height signal indicates the height of the tray 5, it indicates that the electronic component 4 is not present at the suction position, and when the height signal is equal to or greater than the predetermined value, it indicates that the electronic component 4 is present. As a result of the comparison, when the presence of the electronic component 4 is recognized, the component suction nozzle 8 is lowered onto the target electronic component 4, and the electronic component 4 is sucked by suction of air to be taken out from the tray 5.

On the other hand, if the result of the comparison indicates that the presence of the electronic component 4 is not recognized, the CPU 25 moves the moving unit 7 to the next suction position, captures the height signal from the height sensor 20, and similarly stores the value. This is compared with the height data in the memory 26. If the presence of the electronic component 4 is not recognized at this suction position, the same process is performed by moving the moving unit 7 to the next suction position.

Therefore, when the electronic component 4 is not present at the suction position, the suction operation by the component suction nozzle 8 is not performed, so that a suction error does not occur. Further, even if the user intends to use the used tray after the setup change or when parts run out, the operator does not need to confirm whether or not the number is the same as the remaining number at the end of the previous production.

The moving unit 7 sucking the electronic components 4 from the tray 5 moves to a mounting position on the circuit board 17 and mounts the electronic components 4 on the circuit board 17. After the operation of the individual or group-based electronic components for mounting the electronic components 4 is completed, the CPU 25 captures the height of the mounted electronic components 4 (which should be) by the height sensor 20 and stores the value in the memory 26. Compare with the height data at the mounting position stored in. Or, after the mounting work of all the electronic components 4 is completed,
The heights of all the electronic components 4 can be captured by the height sensor 20 and the values can be compared with the height data at the mounting position stored in the memory 26.

If the presence of the electronic component 4 is not recognized as a result of the comparison, an operator is notified as a defective board by an alarm means (not shown), or an apparatus for automatically transporting the defective board to a storage area for the defective board (not shown). Can be provided. Therefore, the circuit board 17 on which the electronic component 4 is not mounted can be easily found, and the production and shipping of such a circuit board 17 can be prevented.

FIG. 4 shows an example in which the electronic component detection device shown in FIGS. 1 and 2 is applied to a component supply device 19 and a transport path 16 of an intermittent feed system. This component supply device 19 is based on the conventional example shown in FIG. This is the same as the component supply device 19. FIG. 5 is a diagram illustrating an example of the intermittent mechanism of the component supply device 19 in FIG.

More specifically, the plurality of feeders 15 constituting the component supply device 19 are intermittently fed by an intermittent feeding mechanism 34 with a belt or a tape 33 each supporting a large number of electronic components 4. The intermittent feed mechanism 34 includes a sprocket 35, a ratchet 36 coaxial with the sprocket 35, a feed pawl 37, a reverse rotation preventing pawl 38, and the operating lever 3.
9 and so on. The belt or tape 33 is provided with a large number of sprocket holes 40 at regular intervals on both sides in the longitudinal direction, and the sprocket holes 40 are engaged with the sprocket 35.

When the operation lever 39 is operated in the direction of arrow A, the feed pawl 37 rotates the sprocket 35 and the ratchet 36 in the direction of arrow B in FIG.
Causes the belt or tape 33 to be intermittently fed by the pitch of the electronic component 4. The reverse rotation preventing claw 38 is for preventing the reverse rotation.

When the moving unit 7 moves to the suction position on the feeder 15 and the height sensor 20 comes above the suction position (the left end of the component supply device 19 in FIG. 4), the CPU 25 The height signal is fetched, and the value is compared with the height data at the suction position stored in the memory 26. When the height signal indicates the height of the feeder 15, it indicates that the electronic component 4 is not at the suction position, and indicates that the electronic component 4 is present when the height is equal to or more than the predetermined value. When the presence of the electronic component 4 is recognized as a result of the comparison, the component suction nozzle 8 is lowered, and the electronic component 4 is sucked by suction of air. On the other hand, when the presence of the electronic component 4 is not recognized as a result of the comparison, an operation lever (not shown) is operated to intermittently feed the next electronic component 4 by the intermittent feed mechanism 34 to the suction position. Thereafter, the height signal from the height sensor 20 is fetched again, and the value is similarly compared with the height data in the memory 26. If the presence of the electronic component 4 is not recognized again, a similar process is performed.

Therefore, when the electronic component 4 does not exist at the suction position, the suction operation by the component suction nozzle 8 is not performed, so that a suction error does not occur. Further, when some of the large number of electronic components 4 on the feeder 15 are missing, the supply can be automatically performed, so that the operator is not bothered.

The moving unit 7 sucking the electronic component 4 from the feeder 15 moves to the mounting position on the circuit board 17,
The electronic component 4 is mounted on the circuit board 17. After the electronic component 4 is mounted, the presence or absence of the electronic component 4 is recognized, and the processing according to the result is the same as in the embodiment of FIG.

Although the electronic component detecting device according to the present invention has been described based on the embodiments shown in the drawings, the present invention is not limited to these embodiments, but can be variously modified.

For example, in order to recognize the presence or absence of the electronic component 4 at the suction position on the tray 5 or the feeder 15, a signal from the height sensor 20 is combined with the height data of the component conveying device at the suction position in the memory 26. Although an example for comparison has been described, the memory 26 stores height data at the suction position for each type of the mounted electronic component 4, and stores the height data and the height sensor 2.
The presence or absence of the electronic component 4 can be recognized by comparing the signals from 0.

[0042]

According to the present invention, a component supply device in which electronic components are arranged in a matrix on a tray, a moving unit that moves to a suction position on the component supply device and takes out the electronic components, and an attachment to the moving unit Height sensor, storage means for storing height data of the suction position, and a height when the moving unit moves to the suction position on the component supply device on which the electronic component is mounted to take out the electronic component. Recognizing means for recognizing the presence of the electronic component by capturing a signal from the sensor and comparing the height data stored in the storage means with the moving unit when the electronic component is not recognized. Since it is configured to move to the next predetermined suction position on the supply device, it is possible to confirm the presence or absence of electronic components at the suction position,
When there is no electronic component at the suction position, the suction operation by the component suction nozzle is not performed, so that no suction error occurs. Further, even if the user intends to use the used tray after the setup change or when parts run out, the operator does not need to confirm whether or not the number is the same as the remaining number at the end of the previous production.

Further, according to the present invention, a component supply device supporting a large number of electronic components at regular intervals, an intermittent feeding means for intermittently feeding electronic components of the component supply device one by one to a suction position, and A moving unit that moves to the pick-up position to take out the electronic component, a height sensor attached to the moving unit, a storage unit that stores height data of the pick-up position, and a mounting unit that picks up the electronic component. When the moving unit moves to the sucked position on the component supply device, the signal from the height sensor is taken in, and compared with the height data stored in the storage means, the recognition means for recognizing the presence of the electronic component. Since the electronic component is intermittently fed to the suction position by the intermittent feeding means when the presence of the electronic component is not recognized, the presence of the electronic component at the suction position is provided. Whether it is possible confirm, since if not present the electronic component pickup position does not perform the suction operation by the suction nozzle, does not occur suction error. In addition, when some of a large number of electronic components on the component supply device are dropped, the supply state can be automatically set, so that the operator is not bothered.

Further, according to the present invention, a component supply device supporting a large number of electronic components, an electronic component is taken out from the component supply device, moved to a mounting position on a circuit board, and mounted on the mounting position. A moving unit, a height sensor attached to the moving unit, storage means for storing height data of the mounting position, and a height sensor after the operation of mounting the electronic component on the mounting position on the circuit board is completed. And recognition means for recognizing the presence of the electronic component by taking in a signal from the device and comparing it with the height data stored in the storage means, so that the occurrence of a circuit board on which no electronic component is mounted can be easily found. An electronic component detection device capable of performing the above can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of an electronic component detection device according to an embodiment of the present invention.

FIG. 2 is a control block diagram of the electronic component detection device according to the embodiment of the present invention.

FIG. 3 is an example in which the electronic component detection device of FIGS. 1 and 2 is applied to a tray-type component supply device.

FIG. 4 is an example in which the electronic component detection device of FIGS. 1 and 2 is applied to a component supply device of an intermittent feed system.

FIG. 5 is a diagram illustrating an example of an intermittent mechanism of the component supply device of FIG. 4;

FIG. 6 is a diagram illustrating an example of a conventional tray-type component supply device.

FIG. 7 is a diagram showing an example of a conventional intermittent feed type component supply apparatus.

FIG. 8 is a diagram showing an order of taking out electronic components from a tray.

FIG. 9 is a diagram illustrating how to count the number of remaining electronic components on a tray.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 tray drawer unit 2 tray base 3 stacker 4 electronic component 5 tray 6 stacker elevating unit 7 moving unit 8 component suction nozzle 9 component supply device 15 feeder 16 transport path 17 circuit board 19 component supply device 20 height sensor 21 light emitting unit 22 light receiving Unit 24 I / O device 25 CP
U 26 Memory 27 X motor driver 28 X motor 29 Y motor driver 30 Y motor 31 Z motor driver 32 Z motor 33 Belt or tape 34 Intermittent feeding mechanism 35 Sprocket 36 Ratchet 37 Feeding claw 38 Reverse rotation preventing claw 39 Operating lever 40 Sprocket hole

Claims (3)

[Claims] 1. A component supply device in which electronic components are arranged in a matrix on a tray; a moving unit that moves to a suction position on the component supply device and takes out an electronic component; and a height attached to the moving unit. A sensor, storage means for storing height data of the suction position, and a sensor from the height sensor when the moving unit moves to a suction position on a component supply device on which the electronic component is mounted in order to take out the electronic component. Recognition means for recognizing the presence of the electronic component by taking a signal and comparing the height data stored in the storage means with the electronic device; An electronic component detection device, wherein the electronic component detection device moves to a predetermined next suction position on a supply device. 2. A component supply device that supports a large number of electronic components at regular intervals, an intermittent feeding unit that intermittently feeds electronic components of the component supply device one by one to a suction position, and moves to a suction position on the component supply device. A moving unit for taking out the electronic component, a height sensor attached to the moving unit, a storage means for storing height data of the suction position, and the electronic component mounted for taking out the electronic component. And a recognition unit for recognizing the presence of the electronic component by taking in a signal from the height sensor when the moving unit moves to the suction position on the component supply device and comparing the signal with the height data stored in the storage unit. An electronic component detecting device, wherein when the presence of an electronic component is not recognized, the intermittent feeding means intermittently feeds the next electronic component accommodating position. 3. A component supply device that supports a large number of electronic components, a moving unit that takes out the electronic component from the component supply device, moves the electronic component to a mounting position on a circuit board, and mounts the electronic component on the mounting position; A height sensor attached to the moving unit; storage means for storing height data of the mounting position; and a height after the mounting operation of the electronic component to the mounting position on the circuit board is completed. An electronic component detection device, further comprising: a recognition unit that receives a signal from a sensor and compares the height data stored in the storage unit to recognize the presence of the electronic component.