JPH0751811Y2 - Electric circuit board cleaning device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric circuit board cleaning apparatus for cleaning flux or the like attached to the back surface of a soldered electric circuit board.

[0002]

2. Description of the Related Art A typical prior art is shown in FIG. In this prior art, in order to automatically clean the flux adhered to the back surface of the electric circuit board 1 on the side opposite to the surface on which the electric circuit elements are mounted, the board 1 is arrowed by using a chain conveyor or the like. It is moved horizontally in the direction of 2.
A plurality of brushes 3 are arranged below the substrate 1 so as to be rotationally driven around a horizontal axis along the moving direction 2, and the brushes 3 are partially contained in the cleaning liquid 5 stored in the cleaning tank 4. Is immersed in.

[0003]

In such a prior art, the electric circuit board 1 moves along the traveling direction 2, and a plurality of brushes 3 are arranged along the traveling direction 2 at this time. Therefore, there is a problem that the length L1 along the traveling direction 2 becomes large, and thus the production line becomes long.

An object of the present invention is to clean an electric circuit board,
An object of the present invention is to provide an electric circuit board cleaning device that can be realized in a relatively small installation space.

[0005]

SUMMARY OF THE INVENTION The present invention is a means for horizontally arranging and fixing an electric circuit board to be cleaned at a cleaning position, and a means for contacting the lower surface of the electric circuit board and being rotatable about a horizontal axis. , A cleaning liquid ejecting means that is provided adjacent to the cleaning position and that injects a cleaning liquid onto the brush, a means that rotationally drives the brush, and a reciprocating displacement drive of the brush between the cleaning position and the cleaning liquid ejection means And a means for cleaning an electric circuit board.

[0006]

According to the present invention, the electric circuit board to be cleaned is horizontally arranged and fixed, and the brush is rotatably driven around the horizontal axis and is reciprocally displaced thereunder. The cleaning liquid is sprayed at the cleaning liquid spraying position adjacent to the cleaning position of the circuit board. In this way, the electric circuit board remains fixed during cleaning, and the brush is driven to reciprocate between the cleaning position and the cleaning liquid ejecting means, so that the moving direction of the brush should be vertical to the production line, for example. By this, the production line can be shortened. In this way, the structure can be made smaller, and the installation space can be reduced.

[0007]

1 is a side sectional view of an embodiment of the present invention, FIG. 2 is a front sectional view taken along section line II--II of FIG. 1, and FIG. It is the simplified top view of the example. With reference to these drawings, the present invention is implemented to clean and remove the flux adhering to the back surface of the electric circuit board 7 after soldering. The flux may deteriorate the insulation resistance and may corrode the conductor, and such flux is removed by washing to complete the electric circuit board 7.

The electric circuit board 7 is supplied as shown by the arrow 8 in FIG. 3, and is discharged after cleaning as shown by the arrow 9. A production line is provided extending in the longitudinal direction in the directions indicated by arrows 8 and 9, and a cleaning device according to the present invention is arranged in the middle of the production line. A plurality of (4 in this embodiment) guide rods 11 are vertically suspended and fixed in the housing 10 of the cleaning device, and the lower end portion of the guide rods 11 supports the electric circuit board 7. The support plate 12 for fixing is fixed. The support plate 12 has a cleaning hole 13 cut out in a rectangular shape. The back surface of the electric circuit board arranged on the support plate 12 faces downward from the cleaning hole 13 and is cleaned by the brush 14 which rotates and moves under the electric circuit board 7.

The brush 14 is provided in the cleaning tank 15 so as to be rotatable about a horizontal axis.
The back surface, that is, the lower surface, of the electric circuit board 7 exposed from the cleaning hole 13 of No. 2 is contacted. The cleaning tank 15 is the moving body 1.
6 is attached to the moving body 16 and
It is movable along a horizontal rail 17 that extends perpendicularly to.

FIG. 4 is a simplified perspective view showing a structure for driving the brush 14. A sprocket wheel 19 is fixed to the shaft 18 of the brush 14, and sprocket wheels 20 and 21 are rotatably provided on the moving body 16. The housing 10 is provided with a pair of sprocket wheels 22 and 23, and an endless chain 25 is wound around the sprocket wheels 22 and 23. It is stretched between. The sprocket wheel 23 is rotationally driven by a motor 26. The moving body 16 is wound around an endless chain 28 at a position indicated by reference numeral 27, and this chain 28 is wound between sprocket wheels 29 and 30. The sprocket wheel 30 is rotationally driven by a motor 31. The motors 26 and 31 can rotate in the forward and reverse directions. Motor 3
1 drives the chain 28 in the direction of the arrow 32, which causes the vehicle 16 and the brush 14 to move in the direction of the arrow 32.
Motor 26 drives chain 25 in the direction of arrow 33 when moving in the direction of
4 is rotationally driven in the direction of arrow 34. When the chain 28 is driven by the motor 31 in the direction opposite to the arrow 32,
The direction of rotation of the motor 26 is reversed and the sprocket wheel 19, and thus the brush 14, is driven in the opposite direction of arrow 34. In this way, while the brush 14 is rotationally driven, it is reciprocally displaced in the direction of the arrow 32 and the opposite direction,
The back surface of the electric circuit board 7 is washed to remove the flux. Thus, the lower surface of the electric wiring board 7 and the brush 14
It is possible to improve the relative contact speed with the element wire.

A cleaning liquid injection nozzle 38 is fixedly arranged on the housing 10 at a cleaning liquid injection position 37 which is adjacent to the cleaning position 36 for the electric wiring board 7 on which the support plate 12 is arranged. The nozzle 38 is tubular with a horizontal axis, and sprays the cleaning liquid from the nozzle hole 39 toward the brush 14 below. This cleaning solution
For example, trichloroethane may be used.

A pressing member 41 is provided so as to be movable up and down along the guide rod 11. The guide rod 11 is inserted into the guide cylinder 42 fixed to the pressing member 41 so as to be mutually displaceable. The pressing rod 43 is fixed to the pressing member 41, and when the electric circuit board 7 is cleaned by the brush 14, the pressing rod 4 is pressed.
3 presses the electric circuit board 7 downward. The pressing member 41 has a plate shape and is fixed to the lower end portion of the piston rod 45 of the double-acting pneumatic cylinder 44.

In cleaning the electric circuit board 7, the piston rod 45 of the cylinder 44, and hence the pressing member 41.
Is rising, and the brush 14 is driven by the motor 31.
Is stopped at the cleaning liquid spraying position 37, and the cleaning liquid sprayed from the nozzle hole 39 of the nozzle 38 is sprayed on the brush 14. After the electric circuit board 7 is mounted on the support plate 12, the piston rod 45 of the cylinder 44 extends, and the electric circuit board 7 is pressed downward by the pressing rod 43 and fixed on the support plate 12. In this state, the motor 3
By the action of 1, the moving body 16, that is, the cleaning tank 15 and the brush 14 are moved from the cleaning liquid jetting position 37 to the cleaning position 36, and the brush 14 is brought into contact with the back surface of the electric circuit board 7 to be cleaned. And thus motor 3
The brush 14 is reciprocated by the action of 1. The brush 14 is constantly driven to rotate by a motor 26. After the cleaning is completed, the piston rod 45 of the cylinder 44,
Therefore, the pressing member 41 moves up, and the brush 14 has returned to the cleaning liquid jetting position 37. In this way, the electric circuit board 7 after cleaning can be removed upward from the support plate 12 and conveyed as indicated by arrow 9.

[0014]

As described above, according to the present invention, the electric circuit board to be cleaned is horizontally fixed at the cleaning position, and in this state, a horizontal axis line extends between the cleaning position and the cleaning liquid jetting position adjacent to the cleaning position. Since the brush that is driven to rotate is reciprocally displaced, the brush is configured to move as described above, for example, in the direction perpendicular to the traveling direction of the electric circuit board in the production line, and the production line is shortened. It is possible to downsize the structure. In particular, in the present invention, the number of brushes may be, for example, one, and since only this brush moves, the size of the configuration is smaller than that of the configuration in which a plurality of brushes are provided as described in connection with the prior art. Can be realized.

Further, in the present invention, since the cleaning liquid is only sprayed onto the brush and a relatively large cleaning tank for immersing the brush to store the cleaning liquid is not required, this also contributes to downsizing of the structure. be able to.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment of the present invention.

2 is a cross-sectional view from the front as seen from the section line II-II shown in FIG.

FIG. 3 is a simplified plan view of the embodiment shown in FIGS. 1 and 2.

FIG. 4 is a simplified perspective view showing a configuration for driving a brush 14.

FIG. 5 is a simplified cross-sectional view of the prior art.

[Explanation of symbols]

 7 Electric Circuit Board 12 Support Plate 14 Brush 15 Cleaning Tank 16 Moving Body 17 Rail 25, 28 Chain 36 Cleaning Position 37 Cleaning Liquid Injection Position 38 Nozzle

Claims (1)

[Scope of utility model registration request] 1. A means for horizontally arranging and fixing an electric circuit board to be cleaned at a cleaning position, a brush which is in contact with a lower surface of the electric circuit board and is rotatable about a horizontal axis, and a cleaning position. A cleaning liquid spraying means for spraying a cleaning liquid onto the brush, a means for driving the brush to rotate, and a means for driving the brush to reciprocate between the cleaning position and the cleaning liquid spraying means. Electric circuit board cleaning device.