JPH0731916A - Method for applying adhesive and device therefor - Google Patents

Abstract

PURPOSE:To surely apply an adhesive to normal position even if there is the eccentricity of an application nozzle. CONSTITUTION:A CCD camera 19 is provided on a dispense unit having an application nozzle. A controller 18 allows the trying of adhesive applying work to unnecessary regions of a substrate in four places at different rotation angles of the applying nozzle. A picture of the applied state is taken by the CCD camera 19 and the quantity of the eccentricity to the rotating shaft of the application nozzle is detected by an image processor 20. The controller 18 allows the execution of the normal adhesive applying work while correcting the position of the application nozzle to the application point on the substrate according to the detected quantity of the eccentricity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a coating nozzle that can be rotated at an arbitrary rotation angle about a rotation axis that is perpendicular to the object to be coated. The present invention relates to an adhesive applying device and an adhesive applying method adapted to apply an adhesive at a rotation angle.

[0002]

2. Description of the Related Art In recent years, for example, an adhesive application device for applying an adhesive to a predetermined application point on a printed circuit board, a component mounting device for mounting an electronic component at a component mounting position corresponding to the application point, and the like. The component mounting system has been provided. Among them, the adhesive applying device includes an application head having a syringe containing an adhesive and an application nozzle having an application nozzle at a tip thereof, based on application data stored in advance, XY
By moving the robot in the XY directions by the robot, the adhesive application work is automatically performed on the substrate carried into the work position.

In order to cope with the sizes and shapes of various parts, a plurality of types of coating nozzles having different coating forms (coating diameter and number of coating points) are prepared and can be replaced according to work. It has become. In this case, for example, for a horizontally long component, a coating nozzle that ejects two adhesives in a line is used, but the component has various angles on the substrate (the longitudinal direction of the component is the front and rear on the substrate). The application nozzle is also rotated by a rotation mechanism at an arbitrary rotation angle.

[0004]

In the adhesive coating device as described above, the coating nozzle may be mounted in an eccentric state with respect to the rotating shaft. Such an eccentricity of the application nozzle causes the adhesive application position on the substrate to deviate from the regular application point. For example, the adhesive may not be applied to the land formed on the substrate. This causes a problem that the adhesive strength is lowered due to a gap between the adhesive and the component when the component is mounted in the subsequent process.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an adhesive coating device and an adhesive coating device capable of coating an adhesive at a regular position even if the coating nozzle is eccentric. It is to provide a coating method.

[0006]

SUMMARY OF THE INVENTION The adhesive coating device of the present invention uses an application nozzle that can be rotated at an arbitrary rotation angle about a rotation axis perpendicular to the application object. In a device for applying an adhesive at a predetermined rotation angle at a predetermined coating position, a trial means for trying a plurality of adhesive coating operations at different rotation angles of the coating nozzle for an eccentricity detection sample, Imaging means for photographing the application state of the adhesive on the eccentricity detection sample, detection means for detecting the eccentricity with respect to the rotation axis of the application nozzle from the image information by the imaging means, and adhesive application on the application object It is characterized in that it comprises position correction means for correcting the position of the coating nozzle with respect to the coating position according to the amount of eccentricity detected by the detection means during work.

Further, in the adhesive applying method of the present invention, a plurality of adhesive applying operations at different rotation angles of the applying nozzle are tried on the eccentricity amount detecting sample before the regular adhesive applying operation, The coating state of the adhesive of the eccentricity amount detection sample is photographed by the image pickup means, the eccentricity amount with respect to the rotation axis of the coating nozzle is detected from the photographed image information, and the coating object is detected according to the detected eccentricity amount. It is characterized in that the regular adhesive application work is performed while the position of the application nozzle is corrected with respect to the application position.

[0008]

According to the adhesive application device of the present invention, the trial means performs a plurality of adhesive coating operations on the eccentricity amount detecting sample at different rotation angles of the coating nozzle.
At this time, when the application nozzle is eccentric with respect to the rotation axis, the eccentricity amount detection sample is applied with the adhesive in an eccentric state from the regular position. Therefore, by photographing the application state of the adhesive on the eccentricity amount detecting sample by the imaging means, the eccentricity amount with respect to the rotation axis of the application nozzle can be detected by the detecting means from the image information.

During the operation of applying the adhesive to the object to be coated, the position correcting unit corrects the position of the coating nozzle with respect to the coating position according to the amount of eccentricity detected by the detecting unit. Even if there is, the adhesive can be applied to the regular position of the application target.

According to the adhesive application method of the present invention,
Before the regular adhesive application work, similarly, the adhesive application work for the eccentricity amount detection sample is tried, the application state is photographed, and the eccentricity amount is detected from the image information.
The adhesive application operation can be performed while correcting the position of the application nozzle with respect to the application position of the application target according to the detected eccentricity amount.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, FIG. 3 shows an external configuration of the main body 1 of the adhesive coating device according to the present embodiment, in which the substrate 3 (see FIG. 2), which is the coating object, is placed on the base 2 in the X direction (see FIG. A board transfer path 4 for transferring the board 3 in the left-right direction is provided, and a board transfer mechanism 5 including a conveyor and a conveyor motor for loading and unloading the board 3 to and from the work position at the center of the board transfer path 4 (see FIG. 1) is provided. Although not shown, positioning pins for holding the substrate 3 in a positioned state, backup pins for supporting the lower surface of the substrate 3, and the like are provided at the working position.

As shown in FIG. 2, a dispensing unit 6 and an XY moving mechanism 7 having a well-known structure are provided on the base 2 above the working position. The XY moving mechanism 7 is configured to freely move the dispensing unit 6 in the X and Y directions based on an XY coordinate system unique to the device.

As shown in FIG. 2, the dispensing unit 6 comprises a frame 8 moved by the XY moving mechanism 7 and, in this case, two coating heads 9, 9. The coating head 9 includes a holder portion 10 provided on the frame 8 so as to be vertically movable, and a head main portion 11
Is rotatably held. Head main part 11
Is a coating nozzle 1 that is provided with a replaceable syringe 12 containing the adhesive B at its upper portion and discharges the adhesive B at its tip.
3 is detachably attached.

Although not shown in detail, the frame 8 is provided with a head drive mechanism 14 (see FIG. 1) for vertically moving each coating head 9 (holder portion 10) and a head main portion 11 ( Apply the coating nozzle 13) to the holder 1
Rotation mechanism 15 for rotating at an arbitrary rotation angle with respect to 0
(See FIG. 1). Further, the dispensing unit 6 is provided with the syringe 1 when the adhesive B is discharged.
A pressure adjusting source 16 (see FIG. 1) for making the inside of the syringe 2 a positive pressure is provided, and is connected to the upper end of the syringe 12 via a tube 17.

As shown in FIG. 1, each of the above-mentioned mechanisms is controlled by a control device 18 provided in the main body 1. The control device 18 is mainly composed of a microcomputer, controls each mechanism based on a control program and application data stored in advance, and controls a predetermined adhesive application point on the substrate 3 carried into the working position. The adhesive application work is automatically performed.
The coating data is composed of position coordinates for each coating point on the substrate 3, the type of the coating nozzle 13 (which coating head 9 is used), the rotation angle of the coating nozzle 13, and the like.

In this case, the coating nozzle 13 is a type of electronic component to be mounted on the substrate 3, such as one in which two adhesives B are discharged side by side as shown in FIG. 4 or one as shown in FIG. A plurality of types having different coating forms (coating diameter and number of coating points) are prepared according to the above, and they can be replaced when performing the adhesive coating work on a new substrate 2.

Now, in this embodiment, the control device 18
Is configured to execute the operation of detecting the amount of eccentricity with respect to the rotation axis of the coating nozzle 13 before performing the regular adhesive coating operation on the new type of substrate 3. Therefore, as shown in FIG. 2, the dispensing unit 6
Is provided beside the coating head 9 and is provided with a CCD camera 19 having a light source 19a as an image pickup means.

As will be described later in the explanation of operation, this CC
The D camera 19 is adapted to photograph the application state of the adhesive B that has been tried on the sample for detecting the amount of eccentricity, and the image data thereof is input to the image processing device 20, and by this image processing device 20, The amount of eccentricity of the coating nozzle 13 with respect to the rotation axis is detected. Therefore, the image processing device 20 functions as the detecting means according to the present invention.

Further, the control device 18 functions as a trial means for trying the application work of the adhesive B on the eccentricity detection sample, and at the time of performing the regular adhesive application work,
Coating nozzle 13 detected by the image processing device 20
Of the coating nozzle 13 for the substrate 3 based on the eccentricity of
The position of the (application head 9) is corrected,
Therefore, it functions as a position correction means.

Next, the operation of the above configuration will be described with reference to FIGS. 4 and 5. Now, in executing the adhesive coating operation on the new substrate 3, the worker sets the necessary coating nozzles 13 for the two coating heads 9, respectively. For example, the coating nozzle 13 for two-point coating (see FIG. 4) is attached to one coating head 9, and the coating nozzle 13 for one-point coating (see FIG. 5) is mounted on the other coating head 9.
Is installed.

Before the regular adhesive application operation is performed, the operation of detecting the amount of eccentricity of the application nozzle 13 with respect to the rotation axis is performed as follows. That is, first, the first substrate 3 is carried into the work position, and the adhesive B is applied by the one application head 9 to the region of the upper surface of the substrate 3 which is not related to the mounting of electronic components. Work is attempted.

In this trial work, as shown in FIG. 4, for example, four different rotation angles (0 °, 90 °) of the coating nozzle 13 are moved while the dispensing unit 6 is moved in the X direction.
It is performed by applying the adhesive B (shown by hatching for convenience) to four positions of the substrate 3 at 90 ° units of °, 180 ° and 270 °. Subsequently, as for the other coating head 9 as well, as shown in FIG. 5, the adhesive B (illustrated by hatching for convenience) is coated on the substrate 3 at four different rotation angles of the coating nozzle 13. Trial work is performed.

Next, the portion of the substrate 3 on which the trial work has been performed is photographed by the CCD camera 19, and the image processing device 2
0, as shown in FIGS. 4 and 5, the center points C1 to C4 and C5 to C8 of the respective application positions of the adhesive B are obtained. Here, since the center position of each coating head 9, that is, the rotation center points P and Q of each coating nozzle 13, are known in advance,
By comparing the point P with the points C1 to C4, the eccentricity of the coating nozzle 13 for two-point coating can be obtained. Further, by comparing the point Q with the points C5 to C8, the eccentricity of the coating nozzle 13 for one-point coating can be obtained.
When the eccentricity amount of each coating nozzle 13 is obtained in this manner, the value is stored in the memory of the control device 18.

Then, after this, a regular adhesive coating operation on the substrate 3 is executed.
Is eccentric, the substrate 3
The coating operation is performed while correcting the position of the coating nozzle 13 with respect to the coating point. With this, even if the application nozzle 13 is eccentric, the adhesive is applied to the regular position of the substrate 3.

As described above, according to the present embodiment, even when the application nozzle 13 is attached in a state of being eccentric with respect to the rotating shaft, the application position of the adhesive agent on the substrate as in the conventional case is normal. The adhesive B can be applied to the regular position of the substrate 3 unlike the case where the adhesive B is deviated from the application point. As a result, it is possible to prevent the adhesive B from being applied to the land formed on the substrate 3, and the adhesive B applied at the time of mounting components in the subsequent process.
It is possible to secure a sufficient adhesive strength without the parts being displaced from each other.

FIG. 6 shows another embodiment of the present invention.
In the above embodiment, the CCD camera 19 is provided in the dispensing unit 6 and moved. However, here, the CCD camera 21, which is the image pickup means, is fixedly arranged upward below the substrate transport path 4. And in the above embodiment,
Although the unnecessary portion of the substrate 3 is used as the eccentricity amount detection sample, in this embodiment, the dedicated transparent plate member 22 is used as the eccentricity amount detection sample.

In this case, the trial work is performed by setting the coating head 9 at X.
While the plate material 22 is fixedly arranged in the Y direction, the adhesive agent B is applied to the plate material 22 at different rotation angles of the application nozzle 13 while moving the plate material 22 in the X direction, and the application position is changed by the CCD camera 21 each time. It is done by detecting.
According to this, the amount of eccentricity of the coating nozzle 13 is detected without moving the coating head 9 and the CCD camera 21, so that there is no error factor and the amount of eccentricity can be obtained more accurately.

In addition, the present invention is not limited to the above-described embodiment, but may be one having one coating head or three or more coating heads, and the coating nozzle 13 is not always necessary.
The trial work does not have to be performed at a rotation angle of 90 °, and can be appropriately changed and implemented within a range not departing from the gist.

[0029]

As is apparent from the above description, according to the adhesive applying device and the adhesive applying method of the present invention, the adhesive applying operation is tried on the sample for detecting the eccentricity and the applying nozzle Since the amount of eccentricity with respect to the rotation axis is detected and the normal adhesive application work is performed while correcting the position of the application nozzle, even if the application nozzle is eccentric, the adhesive is surely applied to the regular position. It has an excellent practical effect of being able to.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a dispensing unit portion.

FIG. 3 is a perspective view showing the overall appearance.

FIG. 4 is a diagram showing an example of a coating state when a coating nozzle for two-point coating is tried.

FIG. 5 is a diagram showing an example of a coating state at the time of trial of a coating nozzle for one-point coating.

FIG. 6 is a view corresponding to FIG. 2 showing another embodiment of the present invention.

[Explanation of symbols]

In the drawings, 1 is a main body, 3 is a substrate (application target), 6 is a dispensing unit, 7 is an XY moving mechanism, 9 is an application head, 11 is a head main part, 12 is a syringe, 13 is an application nozzle, and 15 is a spin. A moving mechanism, 18 is a control device (trial means, position correcting means), 19 and 21 are CCD cameras (imaging means), 20 is an image processing device (detection means), 22 is a plate material (eccentricity amount detection sample), and B is Indicates an adhesive.

Claims (2)

[Claims] 1. An adhesive is applied to a predetermined application position of the application object at a predetermined rotation angle by an application nozzle which can be rotated at an arbitrary rotation angle about a rotation axis vertical to the application object. In the adhesive applying device for applying, a trial means for trying a plurality of adhesive applying operations at different rotation angles of the applying nozzle to the eccentricity detecting sample, and an applying state of the adhesive of the eccentricity detecting sample An image pickup means for picking up an image, a detecting means for detecting an eccentricity amount with respect to a rotation axis of the coating nozzle from image information by the image pickup means, and an eccentricity amount detected by the detecting means during an adhesive coating operation for the coating object. And a position correction unit that corrects the position of the coating nozzle with respect to the coating position. 2. An adhesive is applied at a predetermined rotation angle to a predetermined application position of the application object by an application nozzle that can be rotated at an arbitrary rotation angle about a rotation axis perpendicular to the application object. In the adhesive application method to be applied, before the regular adhesive application operation, a plurality of adhesive application operations at different rotation angles of the application nozzle are tried for the eccentricity detection sample, and the eccentricity detection The coating state of the adhesive of the sample is photographed by the image pickup means, the eccentricity amount with respect to the rotation axis of the coating nozzle is detected from the photographed image information, and the coating position of the coating object with respect to the coating position is detected according to the detected eccentricity amount. An adhesive application method, wherein a regular adhesive application operation is performed while correcting the position of the application nozzle.