JPH0611529Y2 - Circuit board coating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention provides an electrically insulating coating agent called hot melt to a connection terminal of an electronic component such as an LSI (Large Scale Integrated Circuit) attached to a circuit board. The present invention relates to a coating device for coating a circuit board.

PRIOR ART FIG. 9 is a perspective view of a typical prior art. A plurality of terminals 3 of an electronic component 2 such as an LSI (Large Scale Integrated Circuit) mounted on the circuit board 1 are exposed from the circuit board 1,
The terminal 3 exposed from the circuit board 1 is coated with an electrically insulating coating agent, which is so-called hot melt, by the coating device 4. By coating the terminal 3 with such a coating agent, it is possible to prevent the terminal 3 from undesirably coming into contact with a lead wire of another electronic component or the like and being short-circuited.

Such application work is performed manually,
Since the coating agent has to be manually applied to the terminals 3 of a large number of electronic components 2, there has been a problem that much labor and labor are required.

In order to solve such a problem, the coating device 5 shown in FIG. 10 is conventionally used. This coating device 5
Is configured to be driven to rotate about the rotation axis 1, and in a state where the nozzle 5a of the coating device 5 is arranged in the vicinity of the terminal 3, the coating start position P as shown in FIG.
The coating agent is ejected while making a circular motion from 1 to a locus indicated by an imaginary line 6, and the rotary motion of the coating device 5 around the rotation axis 1 is stopped at the completion position P2. And the nozzle 5a
The coating device 5 rises in the direction away from the terminal 3 and returns to the initial position, and the coating operation is completed.

However, in such a prior art, as shown in FIG. 12, in the electronic component 7 having a rectangular planar shape, it is possible to apply the coating agent to the terminals 3 in the range indicated by the region R1. However, the coating agent cannot be applied to the terminal 3 in the range shown by the region R2. Therefore, even if the radius of gyration of the coating device 5 is increased and the coating device 5 is rotationally driven along the locus 6 along the locus indicated by the imaginary line 6a, the coating agent can be coated on the terminals 3 in the region R3. There was a problem that I could not.

SUMMARY OF THE INVENTION Accordingly, the object of the present invention is to make it possible to reliably perform the coating work along the trajectory of the desired portion to be coated, and to improve the efficiency of the coating work. An object of the present invention is to provide a coating device for a circuit board.

Means for Solving the Problems The present invention is directed to a circuit board coating apparatus that performs coating work on a circuit board along a predetermined locus, a motor, a rotating member attached to an output shaft of the motor, and A drive unit, which is rotatably mounted on the rotating member at a position eccentric from the output shaft and includes a guide pin that is spring-biased in the output shaft direction, and a circuit board is mounted on the drive unit. The engaging support member and the support member and the rotating member are interposed and fixed at a fixed position, and the guide pins are guided along the inner peripheral surface in a state where they are vertically separated from each other. A straightening member having a guide hole, and first and second moving members that are connected to the support member by a connecting pin and support the support member so as to be movable in linear directions intersecting with each other on a horizontal plane. And times Faces from above the substrate, a coating device to the circuit board, characterized in that it comprises a coating means disposed in a fixed position.

According to the present invention, roughly, the eccentric rotation motion is given to the support member on which the circuit board is mounted by the driving means, and the eccentric rotation is caused by the first and second moving members. Is movably supported, and the eccentric rotation is restricted by a guide hole of the correction member so as to be displaced in a predetermined direction.

That is, a rotating member is attached to the output shaft of the motor, and a guide pin that is urged by a spring in the output shaft direction and is rotatable at a position eccentric from the output shaft on the rotating member is attached.
The guide pin is engaged with the support member. The support member is connected to the first and second moving members by a connecting pin. The first and second moving members movably support the supporting member in a linear direction intersecting with each other on a horizontal plane, for example, an XY direction.

Further, the support member is guided along the inner peripheral surface of the guide hole of the forcing member in which the guide pin of the drive means is interposed between the support member and the rotating member and fixed at a fixed position. Therefore, the eccentric rotational displacement is
It is regulated by being disassembled into a predetermined amount of displacement in the Y direction.

In this way, for example, an electrically insulating coating agent or the like is applied from the applying means to the circuit board mounted on the support member that is supported so as to be displaceable in the XY directions.

Therefore, the displacement of the support member, that is, the circuit board is performed along the path corresponding to the shape of the guide hole of the correction member, so that the circuit board can be continuously displaced in the desired direction, which is desired. The coating agent or the like can be applied to the circuit board along the locus.

Embodiment FIG. 1 is a plan view of a coating apparatus 10 according to an embodiment of the present invention, FIG. 2 is a sectional view taken along section line II-II of FIG. 1, and FIG. 3 is a coating apparatus. FIG. 10 is an overall plan view of 10,
The figure is an exploded perspective view of the coating apparatus 10. Coating device 10
Is a supporting member 12 on which the circuit board 11 is mounted, a rotating member 14 on which a rotatable pin 13 is biased in one direction by a spring, and a supporting member 12 and the rotating member 1.
4, a straightening plate 15 having a guide hole 20 for guiding the pin 13 along the inner peripheral surface thereof, and pins 16a and 16b which are detachably fitted to the supporting member 12 are provided. It includes a first moving member 17 and a second moving member 18 which are respectively displaced in a direction intersecting with, and a coating means 19 which is located at a fixed position and faces from above the circuit board 11.

An electronic component 22 such as an LSI (Large Scale Integrated Circuit) is connected to the circuit board 11 by soldering to a circuit wiring previously formed on the circuit board 11. The circuit board 11 to which the electronic components 22 are connected has an inverted L-shaped mounting member 23.
Is fixed to the mounting member 23 with a bolt or the like.
Are fixed to the support member 12. A coating agent having an electrically insulating property called hot melt or the like is applied to a plurality of terminals 24 of the electronic component 22 from a nozzle 25 provided in the applying unit 19. Such a nozzle 25
The coating means 19 provided with the
It is moved up and down in the Z1 and Z2 directions.

In this way, the support member 12 to which the circuit board 11 is attached has the pins 16a, 1 provided upright on the first moving member 17.
6b fits in. An opening 26 is formed in the first moving member 17, and the pin 13 provided in the rotating member 14 is fitted into the support member 12 through the opening 26. The correction plate 15 is disposed below the first moving member 17.
The correction plate 15 is mounted on the frame 27. The frame 27 has an upper plate 28, a side plate 29 continuous with the peripheral portion of the upper plate 28, and a bottom plate 30 continuous with the side plate 29 and bent outward. As shown in FIG. 5, the correction plate 15 is positioned on the upper plate 28 by the positioning pins 31a and 31b standing on the upper plate 28 being detachably fitted.

The rotating member 14 is disposed below the upper plate 28, and the pin 13 of the rotating member 14 has an opening 32 formed in the upper plate 28.
And is elastically abutted on the inner peripheral surface of the guide hole 20 of the correction plate 15.

The frame 27 is surrounded by the second moving member 18. The second moving member 18 is provided with a pair of shaft rods 32a and 32b arranged in parallel with each other. Shaft rods 32a, 3
Both ends of 2b are supported by support members 33a1, 33a2; 33b1, 33b2 fixed to the second moving member 18. A pair of bearings 34a fixed to the first moving member 17 are provided on the shaft rods 32a and 32b.
1, 34a2; 34b1 and 34b2. As a result, the first moving member 17 has the shaft rods 32a, 3
It is displaceable in the arrow X1 direction and the arrow X2 direction along the axial direction of 2b. The second moving member 18 is provided with bearings 35a1, 35a2; 35b1, 35b2. The bearings 35a1, 35a2; 35b1, 35b2 are
The shaft rods 36a and 36b are pivotally supported, respectively. Shaft 36
Each end of a and 36b has support members 37a1 and 37a.
2; 37b1 and 37b2. Therefore, the second moving member 18 is displaceable in the arrow Y1 direction and the arrow Y2 direction along the axial direction of the shaft rods 36a and 36b. These support members 37a1, 37a2; 37
b1 and 37b2 are provided with a base 38 as shown in FIG.
Frames 39a, 39b, which are erected parallel to each other on the top,
It is supported by 39c and 39d.

FIG. 7 is a perspective view showing a structure provided in relation to the rotating member 14, and FIG. 8 is a sectional view taken along the section line VIII-VIII in FIG. Housing 4 of the rotating member 14
A bottom plate 42 is attached to the No. 1 by bolts 43.
The bottom plate 42 has an insertion hole 46 into which the output shaft 45 of the drive motor 44 is inserted, and the output shaft 45 is fixed to the bottom plate 42 by a bolt 47 in a state where the output shaft 45 is inserted into the insertion hole 46. On the bottom plate 42, a moving body 49, which is spring biased to one side by a compression coil spring 48, is mounted. The movable body 49 is formed with a shaft hole 50 into which the base portion of the pin 13 is fitted. When the base portion of the pin 13 is fitted into the shaft hole 50, the pin 13 has an opening 5 formed in the housing 41.
It projects outward from 1.

A pair of rollers 52 is attached to the pin 13 protruding outward from the opening 51 so as to be rotatable around the axis of the pin 13. These rollers 52 are prevented from coming off from the pins 13 by, for example, a C-shaped ring 54 fitted into a fitting groove 53 formed in the pins 13. Roller 52
Is elastically abutted on the inner peripheral surface of the guide hole 20 formed in the correction plate 15. Therefore, when drive power is supplied to the drive motor 44 and the output shaft 45 is rotationally driven around its rotation axis, the rotary member 14 is rotationally driven in the same direction as the output shaft 45, and the roller provided on the pin 13 is rotated. 52 rolls along the inner peripheral surface of the guide hole 20. As a result, the pin 13 can move to a shape corresponding to the shape of the guide hole 20.

In the coating device 10 having the above-described structure, when the circuit board 11 to which the electronic component 22 is connected is attached to the support member 12, the nozzle 25 of the coating means 19 descends in the arrow Z2 direction, and the nozzle 25 of the nozzle 25 moves. The tip portion is arranged near the terminal 24 of the electronic component 22. When drive power is supplied to the drive motor 44 in this state, the output shaft 45 is rotationally driven around its rotation axis, whereby the rotary member 14 is rotated.
Starts a rotation operation around a rotation axis common to the output shaft 45. At this time, when, for example, compressed air is supplied to the cylinder 55 arranged close to the drive motor 44, the piston rod 56 retracts and the locked state of the rotating member 14 is released. As a result, the rotary member 14 starts rotating in the arrow R1 direction, and the pin 13 moves along the guide hole 20. By such movement of the pin 13, the support member 12 is displaced in a direction corresponding to the moving direction of the pin 13.

Such displacement of the support member 12 is caused by the pins 16a and 16b.
Is transmitted to the first moving member 17 via
It is transmitted to the moving member 18. These moving members 17, 1
The pins 8 follow the pins 13 and move in the directions of arrow X1, X2 and arrow Y1, Y2, respectively, corresponding to the moving direction of the support member 12. That is, the bearings 34a1, 34a2; 34b1, 34b fixed to the first moving member 17
2 is an arrow mark X1 along the shaft rods 32a and 32b, respectively.
The bearings 35a1, 35a2; 35b1, 35b2 guided in the X2 direction and fixed to the second moving member 18 are the shaft rods 36.
Guided along a and 36b respectively.

As described above, the displacement of the pin 13 is decomposed into the displacement in the orthogonal XY coordinate system and guided by the first and second moving members 17 and 18. This allows the circuit board 1
Corresponding to the shape of the electronic component 22 connected to 1, it is possible to accurately apply the coating agent or the like from the nozzle 25 to the terminal 24.

Effect of the Invention According to the present invention, since the pin position is configured to be guided along the guide hole of the correction member, it is possible to perform the coating work on the circuit board along a desired trajectory, and a series of By the operation, it is possible to perform the coating work all at once over the entire length of the locus to be coated. As a result, the efficiency of the coating operation can be significantly improved. Further, by appropriately changing the shape of the guide hole of the correction member, the coating work can be performed along the trajectory of the desired shape, and the present invention can be implemented in a wide range, which improves convenience. .

[Brief description of drawings]

FIG. 1 is a plan view of a coating apparatus 10 according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the section line II-II of FIG. 1, and FIG. FIG. 4 is an exploded perspective view of the coating device 10, and FIG. 5 is a frame 27 on which a correction plate 27 is mounted.
FIG. 6 is a perspective view of frames 39a to 39d,
FIG. 7 is a perspective view showing a structure provided in relation to the rotating member 14, FIG. 8 is a sectional view taken along the section line VIII-VIII of FIG. 7, and FIG. 9 is a typical prior art perspective view. FIG. 10 is a cross-sectional view of another prior art, FIG. 11 is a view for explaining a conventional coating operation, and FIG. 12 is a view for explaining a conventional problem. 10 ... Coating device, 11 ... Circuit board, 12 ... Support member, 1
3, 16a, 16b ... Pin, 14 ... Rotating member, 15 ... Correction plate, 17 ... First moving member, 18 ... Second moving member, 19
... coating means, 20 ... guide rail groove, 22 ... electronic component, 44 ...
Drive motor

Claims (1)

[Scope of utility model registration request] 1. A circuit board coating apparatus for coating a circuit board along a predetermined locus, comprising: a motor, a rotating member attached to an output shaft of the motor, and the output on the rotating member. A drive unit that is rotatably mounted at a position eccentric from the shaft, and includes a guide pin that is spring-biased in the output shaft direction; and a support member on which a circuit board is mounted and the guide pin of the drive unit engages. A correction having a guide hole that is interposed between the support member and the rotating member and is fixed at a fixed position, and that guides the guide pin along the inner peripheral surface in a state where they are vertically separated from each other. A member, first and second moving members that are connected to the supporting member by a connecting pin, and that support the supporting member so as to be movable in linear directions intersecting with each other on a horizontal plane; From the Coating device to the circuit board, characterized in that it comprises a coating means disposed at a fixed position.