JP3242120B2 - High viscosity fluid coating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention is an adhesive, it relates to an apparatus for applying a highly viscous fluid creamy solder or the like to the printed circuit board, in particular, the detection of the positional deviation of the discharge pipe for discharging the highly viscous fluid , Correction.

[0002]

2. Description of the Related Art A high-viscosity fluid application device prints from a discharge pipe attached to a syringe containing a high-viscosity fluid.
There is an apparatus for applying a highly viscous fluid to a substrate in a spot shape.
The high-viscosity fluid application device described in JP-A-1-56565 is one example. When applying a highly viscous fluid, it is desirable to apply it to the application position with high accuracy. Particularly, as in the case where an adhesive is applied to temporarily fix an electronic component to a printed circuit board, the adhesive is small, and the adhesive space is small. When is short, high coating accuracy is required.

[0003]

However, the actual application position of the high-viscosity fluid may deviate from the normal application position due to a manufacturing error or a mounting error of the discharge pipe or the syringe, and a desired application accuracy may not be obtained. is there. In particular, the discharge pipe is usually fixed to a holder and attached to a syringe via the holder. However, since the discharge pipe is thin and long, it is difficult to fix the discharge pipe to the holder with high concentricity without tilting. In many cases, the application position accuracy is degraded due to an error in fixing to the holder. When high application accuracy is required, after fixing the discharge pipe to the holder, it is necessary to select a product with high fixing accuracy by 100% inspection and use it, resulting in poor yield and high cost .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a high-viscosity fluid coating device capable of detecting and correcting a displacement of a discharge pipe from a normal position.

[0005]

Means and effects for solving the problems One of the high-viscosity fluid application devices according to the present invention is to solve the above-mentioned problems by (a) attaching to a syringe containing a high-viscosity fluid. A coating device for applying a high-viscosity fluid to the printed circuit board in a spot form from the discharge pipe provided;
Is with imaging the coated spot-like high viscous fluid to the application object, provided on the printed circuit board plurality
An imaging device for imaging the reference mark, (c) the discharge pipe position for detecting the positional deviation from the normal position of the discharge tube based on the image of the kiss pot-like high viscous fluid before being captured by the imaging device A shift detecting unit, and (d) the imaging device
Based on the images of the plurality of reference marks
Board displacement detection means for detecting displacement of the printed circuit board
And (e) the height of the printed circuit board by the coating device.
When the viscous fluid is applied, the discharge pipe displacement detecting means and
Of the discharge pipe detected by the
It is configured to include a correction unit that corrects a relative position between the discharge pipe and the printed board based on the displacement and the displacement of the printed board . This highly viscous fluid application
In the device, the same imaging device is used to scan the object to be coated.
A high-viscosity fluid applied in a pot shape and installed on a printed circuit board
An image of both of the plurality of fiducial marks is taken.
Then, discharge is performed based on the image of the spot-like high-viscosity fluid.
The position of the discharge pipe from the regular position by the pipe position deviation detection means
The displacement is detected and the board position is determined based on the reference mark image.
Whether the displacement of the printed circuit board is detected by the displacement detection means
The detected displacement of the discharge pipe and the printed circuit board
Is corrected by the correction means, resulting in high viscosity
The application of the fluid is performed at a precise position on the printed circuit board.
Therefore, errors in the production and mounting of syringes and discharge pipes
Regardless of the presence or absence, apply highly viscous fluid with high accuracy.
Can be. Also, even when high coating accuracy is required
The yield of the discharge pipe does not deteriorate and the coating cost is reduced.
Ascent can be avoided. In addition, printed circuit boards
High viscosity fluid is applied after the displacement has been corrected.
Therefore, the effect of improving the application position accuracy of the highly viscous fluid was obtained.
It is. In addition, the imaging device is capable of forming a spot-like highly viscous fluid.
An imaging, is also used in the imaging of the reference mark of the printed board
Therefore, compared to the case where each is provided exclusively,
The installation cost can be reduced. Another high viscosity according to the present invention
The fluid application device includes: (a) a syringe containing a high-viscosity fluid;
Viscous fluid from the discharge pipe attached to the printed circuit board
An application device for applying the pudding in the form of spots;
A test hitting surface provided on a member separate from the substrate,
Trial driving which discharges a high-viscosity fluid from the discharge pipe to the coating device and applies the test vibrating surface in a spot shape.
Control means; and (d) a test hit on the test hitting surface.
An imaging device for imaging a pot-like high-viscosity fluid;
Of high-viscosity spot-like fluid imaged by an imager
The displacement of the discharge pipe from the normal position is detected based on the
Detecting means for detecting a displacement of the discharge pipe, and (f) the coating device
When applying a high-viscosity fluid to the printed circuit board by
The displacement detected by the discharge pipe displacement detection means
Based on the relative position between the discharge pipe and the printed circuit board.
And a correcting means for correcting. This high viscosity
In a fluid application device, it is a separate member from the printed circuit board.
Apply a high-viscosity fluid in a spot on the test surface
A test beating to make a cloth is performed, and the high-viscosity flow of the test beating is performed.
The body is imaged by the imaging device, and the discharge tube is
The displacement of the discharge pipe is detected by the displacement detection means.
You. Therefore, the high viscous flow applied on the printed circuit board
It is no longer necessary to image the body. On printed circuit board
It is no longer necessary to secure space for trial driving.
Or high viscosity applied to actually mount the electronic components
Detects displacement of the discharge pipe based on the imaging result of the permeable fluid
It is no longer necessary. In the latter case, the applied height
Due to excessive displacement of the viscous fluid, the print
It is possible to prevent the substrate from becoming defective. The above trial
The punching surface is desirably formed on a dedicated test table.
New While transporting the printed circuit board,
Substrate transfer device that positions at a predetermined position in
Outside in a direction perpendicular to the transport direction,
Place the test table in a shape that is almost flat in the longitudinal direction.
Laid out in a row, and test-trim the upper surface of the test table.
Face. The test table is used for a substrate transfer device
Rotatable about a rotation axis parallel to the transport direction of the
And several test striking surfaces extending parallel to the axis of rotation.
For example, multiple rotations with the multiple test hit surfaces facing upward
Shall be selectively positioned at one of the positions.
Can be. In this case, rotate the test table.
With this, it is possible to use multiple test hitting surfaces.
Many trial shots in a relatively narrow space
It becomes possible. Still another high viscous flow according to the present invention
The body application device includes (a) a syringe containing a high-viscosity fluid.
A coating head having two attached discharge pipes;
Turn the coating head around the center line parallel to the two discharge pipes.
And a coating head rotating device for rotating the
High-viscosity fluid from each of the discharge pipes
And (b) the two discharge pipes.
Highly viscous spots applied to the objects to be applied
An imaging device for imaging a sexual fluid; and (c) imaging of the imaging device.
Based on the image result, the displacement and rotation of the coating head are determined.
Error detecting means for detecting a roll angle error, and (d) the coating
Coating the high-viscosity fluid on the printed circuit board by a head
At the time of the cloth, the coating is detected by the error detecting means.
The coating head and the printed circuit board are
And correct the rotation of the coating head.
Correction method for correcting the rotation position of the coating head based on the difference
And a step. This highly viscous fluid coating device
In this case, the coating head having two discharge pipes is close to each other.
A high-viscosity fluid is applied to two places in contact with each other. For example, pre
The electronic components to be mounted on the printed circuit board are relatively large or long.
If it is a hand-shaped fluid, the above two highly viscous fluids
One more electronic component is temporarily fixed to the printed circuit board.
Because If there is only one discharge pipe, the discharge pipe
It is rarely necessary to rotate the
In the case of two tubes, two tubes are required according to the mounting position of the electronic components.
It is desirable to be able to change the arrangement direction of the discharge pipes
It is often good. In this highly viscous fluid coating device,
Make sure that the coating head is rotated by the cloth head rotation device.
This fulfills that need. Thus, the discharge pipe
Coating head having two discharge pipes
Is rotated, only the displacement of the coating head
The rotation angle error is also detected and corrected by the correction means.
According to the present invention, the demand is satisfied.
Is done. Still another high-viscosity fluid application device according to the present invention
(A) attached to a syringe containing a highly viscous fluid
High-viscosity fluid in spot form from printed discharge pipe to printed circuit board
A coating device for coating the discharge pipe;
An imaging device; and (c) the discharge device imaged by the imaging device.
Displacement of the discharge pipe from its normal position based on the image of the outlet pipe
Discharge pipe displacement detecting means for detecting the discharge pipe, and (d) the discharge pipe
Based on the displacement detected by the displacement detection means
To correct the relative position between the discharge pipe and the printed circuit board.
Correction means. This highly viscous fluid coating
In the cloth device, the discharge tube is imaged by the imaging device,
Based on the imaging result, the phase between the discharge tube and the printed circuit board is determined.
The deviation of the position is detected and corrected by the correction means.
Displacement of the discharge pipe is detected based on the image of the discharge pipe itself.
The application state of the highly viscous fluid to the application object
Detects displacement of the discharge pipe without being affected
be able to.

Still another high-viscosity fluid application device according to the present invention.
The device comprises: (a) a substrate supporting device for supporting a printed circuit board;
(B) Attached to syringes each containing a high-viscosity fluid
Sprinkled high-viscosity fluid from the discharge pipe
(C) a plurality of coating heads for coating in a
One head holding member for holding the application head of
(D) the head holding member, the substrate support device, and the coating device;
A printed circuit board supported by a substrate support device with a cloth object
Relative movement in two directions parallel to each other and perpendicular to each other
A moving device, and (e) the coating head by each of the coating heads.
An imaging device for imaging a high-viscosity fluid applied to a cloth object
And (f) each high-viscosity fluid imaged by the imaging device
Each of the discharge tubes of the plurality of coating heads based on the image of
Displacement detection of discharge pipe to detect displacement from normal position
Means (g) by any one of said plurality of coating heads
High viscosity on the printed circuit board supported by the board support device
When the fluid is applied, the discharge pipe position shift detecting means
Position of the discharge pipe of any one of the coating heads detected
Based on the displacement, the head holding member and the substrate support
Correction means for correcting the relative position with respect to the device.
It is. In this highly viscous fluid coating device, one head
A plurality of coating heads are held by a holding member,
The head holding member and the substrate support device and the application object
Each coating is performed by the relative movement
The discharge pipe of the cloth head is
Is positioned. And the spot by the imaging device
Each coating head and base are
Detection of relative displacement between plate support device and coating object
Is corrected. This correction is performed by the head holding member and the substrate
The correction is performed by correcting the relative position with respect to the supporting device.
And the direction of correction,
It can be changed according to the application head. Therefore, one
The head holding member and the relative moving device move the plurality of coating heads.
For any dispensing head
Can be appropriately corrected. High viscosity fluid coating
The cloth device includes the one head holding member.
Of the plurality of coating heads, the imaging by the imaging device
And displacement detection of the discharge pipe by the discharge pipe displacement detection means.
Including means for selecting what should actually take place.
Is desirable.

[0007] Still another high-viscosity fluid application device according to the present invention.
The device is attached to a syringe containing (a) a highly viscous fluid
High-viscosity fluid from printed discharge pipe onto printed circuit board
(B) a coating device for coating in a shape
Multiple spots applied to multiple locations on the cloth
An imaging device for imaging a high-viscosity fluid, and (c) the imaging device
Of the plurality of spot-like high-viscosity fluids imaged by the
Based on the displacement of each position of the image from the normal position
Discharge pipe for detecting a displacement of the discharge pipe from a normal position
(D) the step of detecting the position by the coating device;
When applying the highly viscous fluid to the lint substrate, the discharge pipe
The position of the discharge pipe detected by the displacement detection means
Based on this, the relative position between the discharge pipe and the printed circuit board is compensated.
Correction means. This highly viscous fluid
In a coating device, a plurality of coating objects are
Multiple spot-like high-viscosity fluids applied to each location
Are imaged by the imaging device, and a plurality of
From the regular position of each position of the image of the pot-like viscous fluid
Displacement of the discharge pipe from the normal position based on the displacement
Is detected by the discharge pipe position shift detecting means. But
Therefore, the displacement of the discharge pipe is accurately detected,
Means that the relative position between the discharge pipe and the printed circuit board is
High-viscosity fluid with high accuracy.
Is applied to the application position on the printed circuit board. Therefore,
Regardless of the manufacturing error or mounting error of the nozzle or discharge pipe
Therefore, a highly viscous fluid can be applied with high accuracy. Ma
In addition, even when high coating accuracy is required,
Avoids increase in coating cost without deterioration
be able to.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings, taking an example of applying an adhesive to a printed circuit board.

3 and 4, reference numeral 10 denotes an apparatus main body. On the apparatus body 10, print holds the substrate 12, a printed circuit board moving unit 14 for moving in a horizontal Y-axis direction, the first, second, third coating head 16A, 1
6B, 16C, X that is horizontal and orthogonal to the Y-axis direction.
An application unit 18 that applies an adhesive to the printed circuit board 12 by moving in the axial direction is provided.

On the apparatus main body 10, the printed circuit board moving unit 14 is provided in the X-axis direction.
Conveyor 22 for carrying in the printed circuit board, and an unloading conveyor 24 for carrying out the printed circuit board 12 from the printed circuit board moving device 14.
Are provided. Each of the carry-in conveyor 22 and the carry-out conveyor 24 is a belt conveyor, and has a fixed guide 26 provided at a fixed position and a movable guide 28 provided at a position adjustable in the Y-axis direction. While guiding the movement, the printed circuit board 12
The width is adjusted according to the size of the.

The printed board moving unit 14 is provided on the apparatus main body 10 and has a pair of guide rails 32 extending in the Y-axis direction. On the guide rail 32, a Y-axis table 33 (see FIG. 4) is slidably mounted.
A pair of support walls 34, 36 extending in the X-axis direction are provided on the upper surface of the Y-axis table 33,
And a belt for transporting the sheet. A nut (not shown) is fixed to the lower surface of the Y-axis table 33 and is screwed to a ball screw 38 arranged in the Y-axis direction.
The printed circuit board 12 on the Y-axis table 33 is moved in the Y-axis direction by being driven.

As shown in FIGS. 5 and 6, a test pad 44 made of an adhesive is attached to the outer surface of one of the pair of support walls 34, 36. As shown in FIG. The support wall 34 has a pair of brackets 4 spaced apart in the X-axis direction.
6, and the test hitting table 44 is fitted by shafts 48, both ends of which are supported by the brackets 46, so as to be rotatable and immovable in the axial direction. Trial pad 44
Has a square cross-sectional shape, and is provided with four positioning holes 50 on each of the end faces facing the pair of brackets 46 (see FIG. 7; however, only two are shown in FIG. 7). There). Each of the pair of brackets 46 has one
The positioning pins 54 are fitted slidably in the X-axis direction, and the test struts 44 are
Side of the positioning pin 54.
Is inserted into the positioning hole 50 so that the test table 44
Is prevented, and one of the four test hitting surfaces 58 used for test hitting is positioned at the test hitting position where the upper surface is the upper surface.

An engaging projection 60 is provided at an end of the positioning pin 54 opposite to the test hitting table 44, and the engaging projection 60 is fitted into a notch 62 provided on the bracket 46. In this state, the positioning pin 54 fits into the positioning hole 50 and prevents rotation of the test hitting table 44. However, the positioning pin 54 is pulled into the bracket 46 and rotated.
When the engaging projection 60 is engaged with a portion of the bracket 46 adjacent to the notch 62,
The protrusion to the side is prevented, and the test hitting table 44 can be rotated. After moving a desired one of the four test striking surfaces 58 to the test striking position, the positioning pin 54 was rotated to the phase in which the engaging projection 60 matched the notch 62 and added to the positioning pin 54. When the force is released, the positioning pin 54 fits into the positioning hole 50, and the rotation of the test table 44 is prevented.

Next, the coating unit 18 will be described. As shown in FIG. 3, a base 110 supported by a pair of columns 108 is provided above the movable guide 28 of the carry-in conveyor 22 and the carry-out conveyor 24, and a pair of bases 110 is provided on the base 110. A guide rail 112 is provided in the X-axis direction, and an X-axis table 114 is slidably mounted. The X-axis table 114 is screwed to a ball screw 118 with a nut 116 (see FIG. 9), and the ball screw 118 is connected to the X-axis driving servo motor 12.
By being driven by 0, it is moved in the X-axis direction. The X-axis table 114 has a coating head 16
A, 16B, and 16C are mounted, respectively, and can be moved up and down, respectively, and rotated around the center line thereof. These coating heads 16A, 16B,
The structure of 16C, the structure of lifting and lowering and rotation are described in
This is the same as the high-viscosity fluid coating device described in Japanese Patent No. 56565, and will be briefly described. In addition, three coating heads 16
A, 16B and 16C are the same, and only one will be described.

A block 124 is fixed on the front surface of the X-axis table 114 as shown in FIG.
A guide rail 126 is provided in the up-down direction on 24, and a bracket 128 is slidably fitted. The bracket 128 has an L-shape, and has an arm 130 extending horizontally from the lower end thereof.
6A is attached. At the lower end of the bracket 128, a plate 132 extending in the direction opposite to the arm 130 is fixed, and is slidably fitted to the lower end of a rod 134 which is slidably fitted to the block 124 in the vertical direction. And are urged downward by a spring 136. The upper end of the rod 134 is fitted to the gear housing 138 so as to be slidable in the up-down direction. Is rotated by a motor 140 for raising and lowering the coating head, so that the rod 134 is raised and lowered.
Is raised and lowered.

The coating head 16A has a coating nozzle 144 and a syringe 146 as shown in FIG. The application nozzle 144 is formed by fixing one discharge pipe 150 to the tip of a cylindrical holder 148. The holder 148 is fitted to an adapter 152 fixed to the syringe 146 so as to be relatively non-rotatable, and is fixed by a nut 154. When the discharge pipe 150 is exchanged, the holder 148 is used.
Everything is exchanged. The holder 148 has a stopper 15
6 are provided so as to contact the printed circuit board 12 at the time of applying the adhesive and to secure a certain gap between the discharge pipe 150 and the printed circuit board 12. The coating head 16A is mounted on the bracket 1
28 so as to be relatively rotatable. Bracket 12
8, a large-diameter gear 162 is provided at a protruding end of the cylindrical member 160 from the bracket 128, and an engagement member 164 is provided.
Is fixed, and the coating head 16A is
0 and the engaging member 164
And is engaged so as not to come out in the axial direction. The large-diameter gear 162 meshes with a small-diameter gear 168 (see FIG. 8), and the small-diameter gear 168 is rotated by a coating-head rotating motor 174 via a belt 170 and a pulley 172 shown in FIG. Rotated. Two discharge pipes 150 are provided for one application nozzle 144.
In some cases, two discharge pipes 15 are provided.
The direction of the arrangement of 0s can be changed.

The syringe 146 has a cylindrical shape with a bottom. The opening of the syringe 146 is closed by a cap 180, and the space inside the syringe 146 is formed with a connection fitting 184 and a hose 186.
(See FIG. 9) to connect to a compressed air supply source (not shown). By switching the electromagnetic directional control valve 188 (see FIG. 11) provided in the middle of the hose 186, the syringe 146 is selectively communicated with the compressed air supply source and the atmosphere, and the adhesive is supplied when the compressed air is supplied. Is discharged through the holder 148 and the discharge pipe 150.

As shown in FIG. 8, the coating unit 18 is provided with a camera 190 for reading a reference mark provided on the printed circuit board 12. Prior to the application of the adhesive, the fiducial marks are read, and the movement amounts of the Y-axis table 33 and the X-axis table 114 are corrected based on the read result. It can be moved with high precision.

The present coating apparatus has a control unit 20 shown in FIG.
Controlled by 0. The control device 200 includes the CPU 20
2. The main component is a computer having a ROM 204, a RAM 206 and a bus 208 connecting them. An input interface 210 is connected to the bus 208, and a camera 190 and an input device 212 are connected. The bus 208 also has an output interface 216
Are connected, and the driving circuits 218, 220, 222,
X-axis table driving motor 1 via 224 and 226
20, a motor 40 for driving the Y-axis table, a motor 140 for lifting / lowering the coating head, a motor 174 for rotating the coating head, and an electromagnetic direction switching valve 188.
8, a camera 190 is connected. RAM 20
6, a trial hitting number memory 23 as shown in FIG.
0, a trial hitting start position memory 232, a trial hitting interval memory 234, a trial hitting start time memory 235, a displacement detection coating head designation memory 236, and first to third coating head positional shift amount memories 238, 240, 242, A counter 244 and flags F ₁ and F ₂ are provided together with the working memory. In addition, the ROM 204 stores FIG.
1 stores a main routine shown by a flowchart, a discharge pipe position deviation detection routine shown by a flowchart in FIGS. 1 and 2, and an adhesive application routine (not shown).
Each of the coating heads 16A, 16B, and 16C has one discharge pipe 150 attached thereto, and this detection routine detects a displacement of one discharge pipe 150.

Prior to the detection of the displacement, the input device 212 inputs the number N of trials of the adhesive, the trial starting position, the trial interval, and the type of the coating head 16 for detecting the displacement of the discharge pipe 150. , Stored in memory. At the time of trial driving, the trial driving table 44 is moved to a position where the position of the coating heads 16A, 16B and 16C in the Y-axis direction coincides with the movement of the Y-axis table 33. Although the coating is performed, the test hitting start position is a position closest to the first coating head 16A among these many coating positions. This position is given by the X coordinate of the zero position of the first coating head 16A in the original position shown in FIG. 3, denoted here as L _1. Further, the trial interval is the spacing of applying an adhesive onto the trial surface 58, and L _2. Further, it is assumed that the displacement of the discharge pipe 150 is detected for all of the first to third coating heads 16A to 16C. Note that the camera 190
Are pre-aligned so that the imaging center moves accurately to the designated position.

When the power is turned on, step S101 of the main routine (hereinafter abbreviated as S101; the same applies to other steps) is executed, and initialization such as resetting of the counter 244 and the flags F ₁ and F ₂ is performed. Done. Next, S102 is executed, and as will be described in detail later, the discharge pipe 150 is displaced according to the discharge pipe position shift detection routine shown in FIG.
Is detected in S103 after the position shift of
The adhesive is applied to the printed circuit board 12 in accordance with the adhesive application routine stored in 04. At the time of this application, S1
02, the displacement amount of the discharge pipe 150 detected in
The movement amount of the discharge pipe 150 and the movement amount of the printed circuit board 12 are respectively corrected. Prior to the application of the adhesive, the reference mark is read by the camera 190 on the printed circuit board 12 and the amount of displacement thereof is calculated. Is corrected so that both the displacement of the discharge pipe 150 and the displacement of the printed circuit board 12 are eliminated. This correction is performed every time the adhesive is applied at one point. However, all the application positions of one printed circuit board 12 may be corrected before applying the adhesive.

Hereinafter, the detection of the displacement of the discharge pipe 150 will be described in detail based on the discharge pipe displacement detection routine shown in FIG. First, in step S1, the flag F
A determination is made whether ₁ is set. Flag F ₁ is the initial setting of the main routine (not shown) and S1
Since the reset is performed in steps 7 and 45, the determination is NO when S1 is performed for the first time, and a determination is made in S2 as to whether or not the positional deviation of the discharge tube 150 is to be detected for the first coating head 16A. This determination is YES,
In S3, the count value C of the counter 244 is stored in the trial hitting start time number memory 235. Prior to starting test hitting for one application head 16, the count value C at the start is stored. The count value at the time of the trial start and C _A.

Next, S4 is executed, and the first coating head 1
6A is moved to the first trial hitting position. This position is equal to the distance L ₁ from the first coating head 16A at the original position to the test starting position, L ₂ · C (C is a counter 24).
(Count value of 4). now,
The test strike surface 58 positioned at the test strike position still has 1
If no test strikes have been made, then C = 0,
The first application head 16A is moved to the test hitting start position on the test hitting surface 58. Then, after the adhesive is applied to the test hitting surface 58 in S5, the count value C of the counter 244 is increased by 1 in S6. Then, S
The difference between the count value C _A stored in the count value C and S3 in 7 whether or not the trial number of times N or more, that is, whether the trial has been performed N times is determined. In the present embodiment, the number of trial hits N is set to 5 times, and S
7 is NO and the execution of the routine returns to S4.

S7 is YES if test hitting is performed N times
Next, after the count value C is returned to C _A at S8, the trial has been spot-like adhesive is imaged.
First, S9 is executed to move the camera 190 onto the first adhesive. The camera 190 is the X-axis table 11
4 of the first coating head 16A by a distance L ₃ is provided at the position of the front side (the trial base 44 side), the camera 190
Movement distance is determined by subtracting the L ₃ from the moving distance to the coating position of the first coating head 16A. After the movement, in S10, the camera 190 captures an image of the applied adhesive. Next, in S11, the count value C of the counter 244 becomes 1
Be increased, minus the C _A to C in S12 is based on whether it is N, adhesives all coated is determined whether captured. This determination is initially NO, and S9 to S12 are repeatedly executed until the determination in S12 becomes YES.

If all the applied adhesives are imaged, S
12 is YES, and in S13, the displacement amounts ΔX ₁ and ΔY ₁ of the discharge pipe 150 are calculated. As described above, the camera 190 can be accurately moved to the designated position, and the imaging center of the camera 190 is the normal position of the discharge pipe 150. Therefore, if there is no manufacturing error or mounting error in the discharge pipe 150, the syringe 146, or the like, the center of the spot-shaped adhesive coincides with the imaging center of the camera 190, but if there is an error, the coating is performed as shown in FIG. The applied adhesive 248 appears to be shifted with respect to the imaging center. S
In 13, the center of each of the five applied adhesives 248 is
The average of the X and Y coordinates with the imaging center at (0, 0) is calculated, and the deviation amounts ΔX ₁ and ΔY ₁ between the average center and the imaging center of the camera 190 are calculated, and the first coating head position deviation amount memory 238. When the adhesive is actually applied to the printed circuit board 12, the amount of displacement of the printed circuit board 12 and the amount of displacement of the discharge pipe 150, and the amount of movement of the first application head 16A and the printed circuit board 12 are corrected.
The adhesive is applied to the printed board 12 with high accuracy.

After detecting the displacement, the flag F is set at S14.
_{After 1} is set, it is determined in S15 whether or not the count value C is equal to or more than the allowable application number _CMAX . The allowable application number C _MAX is a number that allows the test hitting to be performed on the test hitting surface 58, and a determination is made as to whether or not the test hitting surface 58 can be further test hit. If the trial count has not yet become a C _MAX S15 is NO, execution of the routine S
Return to 1. On the other hand, when the test hitting cannot be performed any more on the test hitting surface 58, S15 becomes YES and S15
At 16 an alarm is issued. Accordingly, the operator rotates the test hitting table 44 and positions the test hitting surface 58 on which the test hitting has not yet been performed at the test hitting position, or cleans or replaces the test hitting table 44.
After the occurrence of the alarm, the counter 244 and the flags F ₁ and F ₂ are reset in S17, and the execution of the routine ends.

When the detection of the displacement of the discharge pipe 150 of the first coating head 16A is completed, the determination becomes YES when S1 is executed next. Then, in S18, the flag F ₂
Is determined whether or not the second coating head 16B is set in S19.
A determination is made as to whether or not to detect a positional deviation for the discharge pipe 150 of FIG. Now, since the second coating head 16B is also designated as a target for detecting a displacement, the determination in S19 is YE
In S, S20 to S31 are executed in the same manner as S3 to S14, and the displacement amounts ΔX ₂ and ΔY ₂ are calculated. However, the moving amount of the second coating head 16B is equal to the moving amount L ₁ + L ₂ · C at the time of detecting the displacement of the first coating head 16A.
Is an amount that the distance L ₄ plus the first coating head 16A and the second coating head 16B.

The displacement amounts ΔX ₂ and ΔY ₂ of the discharge tube 150 of the second coating head 16B are stored in the second coating head displacement memory 240. Since the positional deviation detection is the flag F ₂ is set if finished, the determination is YES, the positional deviation detection for the discharge pipe 150 of the third coating head 16C in S32 shown in FIG. 2 performed when the next S18 is executed Is determined. This judgment is YES
Then, S33 to S43 are executed in the same manner as S3 to S13, and the positional deviation amounts ΔX ₃ and ΔY ₃ are calculated and stored in the third positional deviation amount memory 242. However, the amount of movement of the third coating head 16C is a position on the movement amount at the time deviation detection, the amount obtained by adding the distance L ₅ between the first coating head 16A and the third coating head 16C of the first coating head 16A . If the positional deviation amount has been calculated, S44 is executed, and it is determined whether the test hit has been performed C _MAX times. C _MAX times done S44 unless is NO, the flag F _1, execution of F ₂ is reset routine in S45 is terminated.

It is to be noted that the displacement may be detected with respect to the discharge pipe 150 of one or two of the three coating heads 16A to 16C. For example,
When the positional deviation is detected only with respect to the discharge pipe 150 of the first coating head 16A, the determination becomes YES when S1 is executed after the detection is completed.
S32 is NO in both cases, and after execution of S45, the execution of the routine ends. When detecting the displacement of the discharge pipe 150 with respect to the first coating head 16A and the third coating head 16C, first, S2 becomes YES and the first coating head 16A
Is detected with respect to the discharge pipe 150 of FIG.
Is YES, S18 and S19 are NO, and S32 is YES, and the displacement of the discharge pipe 150 of the third coating head 16C is detected.

Further, the RAM 206 is backed up so that the stored contents are not erased even when the power of the present adhesive coating apparatus is turned off. Even if the power is turned off,
The data at the end of the previous misalignment detection remains. The count value C of the counter 244 also remains, and it is possible to know how many times the test hitting has been performed on the test hitting surface 58 positioned at the test hitting position. The application of the adhesive can be started from the position next to the last trial hitting position at the time of detecting the displacement of the tip of the hitting surface 58, and the trial hitting surface 58 can be used without waste.

As is apparent from the above description, in the present embodiment, the printed board moving unit 14, the coating unit 18 and the like constitute a coating device, and the camera 190 constitutes an imaging device. S8 to S1 of the ROM 204
3, S25 to S30, S38 to S43, and a portion of the CPU 202 and the RAM 206 for executing the steps constitute a misalignment detecting means, and a portion of the ROM 204 for storing an adhesive application routine, and the CPU 202 and the RAM 206. The part executing these steps constitutes the correction means.

FIGS. 15 to 17 show another embodiment of the present invention.
Shown in In this embodiment, the displacement of the two discharge tubes 150 attached to one coating head 16 is detected. As shown in FIG. 15, two discharge pipes 150A and 150B
Are mounted at intervals of 180 degrees on one circumference centered on the rotation center of the syringe 146, and are used at two positions: a position rotated by an arbitrary angle. These discharge pipes 1
The detection of the displacement of 50A and 50B is performed according to the flowchart of FIG. In this embodiment, only one coating head 16 is provided for the sake of simplicity. However, when a plurality of coating heads 16 are provided, any The positional deviation can be detected by using data indicating whether the positional deviation of the discharge pipe is detected for the application head and the flag indicating whether the positional deviation of the discharge pipe has been completed for the designated coating head.

At the time of detecting the displacement, first, S201 to S201
Step 205 is performed, and the application of the adhesive is performed five times in a state where the discharge pipes 150A and 150B are located at the first trial hitting position shown in FIG. If it is applied five times, S205 becomes YES,
In S206, the application head 16 is rotated 180 degrees, and the discharge pipes 150A and 150B are moved to the second trial hitting position. In this state, S207 to S210 are performed, and the adhesive is applied five times. If this coating is completed, S211
After the count value C of the counter 244 is returned to the stored values C _A at S201 in, S212～S21
5 is performed, and the ten sets of applied adhesives are imaged. After the imaging, in S216, the distance between the discharge tubes 150A and 150B is calculated based on the images of the five sets of adhesive applied in a state where the discharge tubes 150A and 150B are located at the first trial hitting position. The average position (X, Y coordinates) of the centers of the five adhesives applied by the discharge pipe 150A and the discharge pipe 150
The average position (X, Y coordinates) of the centers of the five adhesives applied by B is calculated, and the distance between the average center positions is obtained. In S217, the distance is set within the set range. A determination is made whether there is. 1
If the distance between 50A and 50B is too large or too small to be used for coating, S217 is NO and S219
Is issued and the execution of the routine ends.

If the distance between the discharge pipes 150A and 150B is within the set range and can be used for coating, YES is determined in S217.
In S220, the displacement amounts ΔX and ΔY in the horizontal direction of the discharge pipes 150A and 150B and the rotation angle error Δθ are calculated. As described above, the camera 190 has its imaging center moved to a position exactly specified. As shown in FIG. 16, the actual rotation center M _A of the discharge pipes 150A and 150B and the imaging of the camera 190 are determined. The amount of deviation from the center is the amount of positional deviation ΔX _A , ΔY _A in the horizontal direction, and a straight line connecting the center of the discharge pipe 150A and the center of the discharge pipe 150B and the camera 19
The angle formed by the 0 imaging plane and the Y axis is the rotation angle error Δθ. The rotation center M _A includes the discharge pipe 150A and the discharge pipe 150B.
And are calculated by calculating the rotation centers for each and averaging them. The discharge pipe 150A has five adhesives 248A applied by the discharge pipe 150A at the first position.
At the average position of each center of the discharge pipe 150 and the second position.
The middle point between the center of each of the five adhesives 248A 'applied with A and the average position is the actual center of rotation of the discharge pipe 150A.
The center of rotation is similarly obtained for the discharge pipe 150B, and the average of these two types of centers of rotation is used as the actual center of rotation. The calculated positional deviation amounts ΔX, ΔY and rotation angle error Δθ are stored in the memory. Note that the adhesive 248A, A
′ Is due to the application of the discharge pipe 150A, and FIG.
Here, for convenience of explanation, the adhesive formed by applying the discharge pipe 150B is also represented. After calculating the positional deviation amount, allowable application number C _MAX adhesive the trial face 58 is made a determination whether it is applied in S120, yet, it does not reach the C _MAX S221 is NO, execution of the routine Ends.

When the adhesive is applied, the coating head 16 and the printed board 12 are displaced ΔX _A , ΔY _{A of the} discharge pipes 150 _A and 150 B in addition to the displacement of the printed board 12.
The coating head 1 is moved relatively by the corrected amount.
6 is rotated by Δθ, the horizontal displacement and the rotation angle error are corrected, and the adhesive is applied to the printed circuit board 12 with high accuracy.

In each of the above embodiments, the position shift is detected by imaging the adhesive applied to the test hitting surface 58. However, the position shift is detected by imaging the discharge tube 150 itself. May be. In particular, if the lower end surface of the discharge pipe 150 is imaged, the displacement can be detected in the same manner as in the above embodiment.

In addition, without departing from the scope of the claims, the present invention can be implemented in various modified and improved forms based on the knowledge of those skilled in the art.

[Brief description of the drawings]

FIG. 1 is a flowchart of a discharge pipe position shift detection routine stored in a ROM of a computer serving as a main body of a control device of an adhesive application apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart of a discharge pipe position shift detection routine stored in a ROM of the computer.

FIG. 3 is a plan view schematically showing the adhesive application device.

FIG. 4 is a front view schematically showing the adhesive application device.

FIG. 5 is a front view showing a test table provided in the adhesive application device.

FIG. 6 is a side view of the test table.

FIG. 7 is a front view (partial cross section) showing a positioning portion of the test hitting table.

FIG. 8 is a front view showing a coating unit of the adhesive coating device.

FIG. 9 is a side view showing the coating unit.

FIG. 10 is a front sectional view showing a coating head provided in the coating unit.

FIG. 11 is a block diagram showing the control device.

FIG. 12 is a diagram showing a configuration of a RAM of the computer.

FIG. 13 is a flowchart showing a main routine stored in a ROM of the computer.

FIG. 14 is a diagram illustrating detection of a displacement of a discharge pipe of the coating head.

FIG. 15 is a view showing a mounting position of a discharge pipe in a coating head of an adhesive coating device according to another embodiment of the present invention.

FIG. 16 is a diagram illustrating detection of a displacement of the discharge pipe shown in FIG.

FIG. 17 is a flowchart showing a discharge pipe position shift detection routine shown in FIG.

[Description of Signs] 12 Printed circuit board 18 Coating unit 44 Trial pad 146 Syringe 150 Discharge tube 190 Camera 200 Control device 248 Adhesive

Continuation of the front page (72) Inventor Seiichi Terui 19, Chausuyama, Yamamachi, Chiryu-shi, Aichi Fuji Machine Manufacturing Co., Ltd. (56) References JP-A-4-37090 (JP, A) JP-A-1 JP-A-135561 (JP, A) JP-A-61-234968 (JP, A) JP-A-2-140992 (JP, A) JP-A-1-318298 (JP, A) (58) Fields investigated (Int. . ^7, DB name) B05C 5/00 - 5/02 B05D 1/26 H05K 3/34 504

Claims (9)

(57) [Claims] 1. A coated to a high viscous fluid from the discharge tube attached to a syringe for accommodating a coating apparatus for applying a highly viscous fluid to a printed circuit board in a spot shape, the coating object is discharged from the discharge pipe spot A high-viscosity fluid in the form of a tube is imaged and the print is made.
An imaging device for imaging a plurality of reference marks provided on the substrate, to detect the positional deviation from the normal position of the discharge tube based on the image of the kiss pot-like high viscous fluid before being captured by the imaging device Discharge pipe displacement detection means, and the plurality of fiducial marks imaged by the imaging device.
Board position to detect displacement of printed circuit board based on image
Displacement detecting means, and a high-viscosity fluid to the printed circuit board by the coating device.
At the time of coating, the discharge pipe position deviation detecting means and the substrate position
The displacement of the discharge pipe detected by the displacement detecting means
And a correcting means for correcting a relative position between the discharge pipe and the printed circuit board based on a displacement of the printed circuit board. 2. Attachment to a syringe containing a highly viscous fluid
Sprinkled high-viscosity fluid from the discharge pipe
A coating device for coating in a shape, a test hitting surface provided on a member separate from the printed circuit board, and discharging a high-viscosity fluid from the discharge pipe to the coating device to form a spot on the test hitting surface. Trial coating to apply
Control means, and a spot-like high-viscosity flow test-punched on the test-punching surface
An imaging device for imaging a body, and a spot-like high-viscosity fluid imaged by the imaging device.
Based on the image, the displacement of the discharge pipe from the normal position
A discharge pipe position shift detecting means for detecting, and a high-viscosity fluid to the printed circuit board by the coating device.
At the time of coating, it is detected by the discharge pipe displacement detecting means.
Between the discharge pipe and the printed circuit board based on the
Correction means for correcting the relative position.
High viscosity fluid coating device. 3. A printed circuit board is transported and transported.
In advance in the sending direction Substrate positioned at a fixed position
Outer side of the transfer device in a direction orthogonal to the transfer direction
The test table has a longitudinal shape, and the longitudinal direction is the transport direction.
It is arranged in a posture almost parallel to
3. The test hitting surface is used as the test hitting surface.
2. The high-viscosity fluid coating device according to claim 1. 4. The test hitting table is mounted on the substrate transfer device.
It is rotatable around a rotation axis parallel to the transport direction,
Equipped with a plurality of test hitting surfaces extending parallel to the rotation axis,
A plurality of rotation positions where the plurality of test hitting surfaces face upward
To be selectively positioned in any of
The high-viscosity fluid application device according to claim 3, characterized in that: 5. Attachment to a syringe containing a high-viscosity fluid
A coating head having two discharge tubes that were kicked, and a coating head rotating device for rotating about a center line parallel to the coating head in the discharge pipe of the two, the discharge of the two
High-viscosity fluid is spotted from each of the tubes onto the printed circuit board
A coating device for coating, an imaging device for imaging the spot-like high-viscosity fluid applied to the application target by the two discharge tubes , and a coating device for the coating head based on an imaging result of the imaging device .
Error detecting means for detecting displacement and rotation angle error
And the high viscosity to the printed circuit board by the coating head
At the time of application of the fluid, before being detected by the error detecting means.
The application head and the pre-
Not only compensates for the relative position with the
The rotation position of the coating head based on the
A high-viscosity fluid application device, comprising: 6. Attachment to a syringe containing a highly viscous fluid
Sprinkled high-viscosity fluid from the discharge pipe
A coating device for coating in a An imaging device for imaging the discharge pipe; Based on the image of the discharge pipe taken by the imaging device
Pipe position to detect displacement of the discharge pipe from its normal position
Displacement detection means, The displacement detected by the discharge pipe displacement detecting means
Based on the relative position of the discharge pipe and the printed circuit board.
Correction means for correcting the position High viscosity characterized by containing
Fluid applicator. 7. A board supporting device for supporting a printed board.
When, Each is attached to a syringe containing a highly viscous fluid
A high-viscosity fluid from the discharge pipe onto the printed circuit board
A plurality of coating heads for coating in a shape, One head holding unit for holding the plurality of coating heads
Materials and The head holding member, the substrate support device, and the object to be coated.
Parallel to the printed circuit board supported by the board support device
Relative movement device for relative movement in two directions perpendicular to each other
And Applied to the application object by each of the application heads
An imaging device for imaging a high-viscosity fluid, Based on the image of each highly viscous fluid imaged by the imaging device
And the normal position of each of the discharge tubes of the plurality of coating heads
Discharge pipe displacement detection means for detecting the displacement of The substrate support by any one of the plurality of coating heads
High viscosity fluid is applied to the printed circuit board supported by the device.
Before the discharge pipe is detected by the discharge pipe displacement detecting means.
Based on the displacement of the discharge tube of any one coating head
The relative position between the head holding member and the substrate support device.
And a correcting means for correcting the position.
Fluid applicator. 8. A head held by the one head holding member.
Imaging by the imaging device among the plurality of coating heads
And the discharge pipe position is not detected by the discharge pipe position shift detecting means.
Include means for selecting what should actually be detected.
The high-viscosity fluid application device according to claim 8, wherein: 9. Attachment to a syringe containing a high-viscosity fluid
A high-viscosity fluid is sprayed from the discharge pipe
A coating device for coating in a slit shape; The coating device applies the coating to multiple locations on the application target.
Imaging device for imaging a plurality of scattered high viscosity fluid spots
And The plurality of spot-like heights imaged by the imaging device
Misalignment of each position of viscous fluid image from normal position
The displacement of the discharge pipe from the normal position based on the
Discharge pipe position deviation detecting means, The high-viscosity flow to the printed circuit board by the coating device
At the time of application of the body, it is detected by the discharge pipe displacement detection means
The discharge pipe and the preload are determined on the basis of the misalignment of the discharge pipe.
Correction means for correcting the relative position with respect to the printed circuit board.
A high-viscosity fluid application device characterized by the following.