JPH04201565A - cleaning equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cleaning device used in a cream solder printing device that prints cream solder on the surface of a printed circuit board in order to mount various electronic components on the printed circuit board.

Prior art FIGS. 3 and 4 show a conventional cleaning device.
The figure is a schematic front view, and FIG. 4 is a schematic side view. Figure 3,
In FIG. 4, 31 is a printing screen, 32 is a frame that supports the outer edge of the screen 31 and extends the screen 31 in a horizontal state, and 33 is a linear guide means above the screen 31 and connected to the main body of the apparatus (not shown). It is a movable platform supported horizontally by a motor (not shown), and is moved by a driving means (not shown) consisting of a motor, power transmission means, etc. 34 and 35 are first parts that can move together with the movable base 33;
and second squeegees 36 and 37 are attached to the movable base 33, and the first and second squeegees 34 and 35 connected to the tips of the piston rods 36a and 37a are attached to the piston rod 3.
An air cylinder 38 is a cylindrical cleaning member that is moved up and down as 6a and 372 expand and contract, and is arranged horizontally below the screen 31. A shaft 39 is supported so as to be movable in the horizontal direction. It is moved by a drive means (not shown) consisting of a transmission means or the like. 40 is cream solder supplied onto the screen 31.

In the above configuration, thought and its operation will be explained.

During cream solder printing, the cleaning member 38 is moved to a position where it does not interfere with printing, and a printed circuit board (not shown) is placed below the screen 31. And the piston rods 36a, 3 of the air cylinders 36, 37
7b expands and contracts, the first and second squeegees 34 and 35 are selectively lowered to press the screen 31, and the movable base 3
By moving horizontally with 3, cream solder 4
0 is passed through the screen 31 and printed on the printed circuit board below it. After printing is completed, first and second squeegee 34.3
5 is raised and stopped above the screen 31, and the cleaning member 38 is horizontally moved in the direction of the arrow while being in contact with the lower surface of the screen 31 by a driving means. Along with this, the screen 31 is cleaned by the cleaning member 38.
The cream solder 40 protruding from the bottom surface can be wiped off.

When the cleaning member 38 reaches the other end of the screen 31, it rotates slightly and is fixed. This makes it possible to change the contact position with the sponge 11-31 during the next cleaning operation, making it suitable for continuous cleaning operations.

Problems to be Solved by the Invention However, in the above-mentioned conventional cleaning device, the fourth
As shown in the figure, the cleaning member 38 and the screen 3
Even if the height dimension from 1 is slightly reduced, the cleaning member 38 pushes up the screen 31, creating a gap between the screen 31 and the cleaning member 38, and wiping off the cream solder 40 becomes incomplete. Further, during continuous cleaning work, when the cleaning member 38 rotates more than once, the cream solder 40 that has already been wiped off comes into contact with the screen 31 again, resulting in incomplete wiping.

The present invention solves such conventional problems, and even if the height dimension of the screen changes, it is possible to reliably wipe off the cream solder over the entire surface of the screen.
Another object of the present invention is to provide a cleaning device that can always reliably wipe off cream solder even during continuous use, and therefore can perform cream solder printing well.

Means for Solving the Problems The technical solution of the present invention for achieving the above object is as follows:
A cleaning pipe supported horizontally movably below the printing screen and provided with a row of suction holes that can face the screen, and movable and rotatable integrally with the cleaning pipe. a supported feed-out roller and take-up roller; a mesh-like cleaning sheet that is wound around the feed-out roller, hung on the cleaning pipe so as to close a suction hole thereof, and wound around the take-up roller; a suction means for suctioning the screen from the suction hole of the cleaning pipe through the cleaning sheet and bringing it into close contact with the cleaning sheet; the cleaning pipe;
It is equipped with a drive means for horizontally moving a feed roller, a take-up roller, and seven cleaning sheets integrally.

Therefore, according to the present invention, a cleaning pipe or the like is positioned below the screen, and the suction means suctions the screen through the cleaning sheet from the suction hole of the cleaning pipe, brings it into close contact with the cleaning sheet, and horizontally moves the screen. let Accordingly, the cream solder protruding from the lower surface of the screen can be wiped off, and the cream solder remaining inside the slit holes of the screen can also be sucked and adhered to the cleaning sheet.

Further, when the cleaning pipe or the like reaches the other end of the screen, the take-up roller is rotated to wind up the cleaning sheet a little, so that the screen can be brought into close contact with a new portion of the cleaning sheet.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

1 and 2 show a cleaning device according to an embodiment of the present invention, FIG. 1 is a schematic front view, and FIG.
FIG. 3 is an enlarged sectional view taken along line nn in the figure.

In the present embodiment shown in FIGS. 1 and 2, the cream solder printing device can be configured in the same manner as the conventional example, and is therefore not shown. As shown in FIGS. 1 and 2, the outer edge of the printing screen 1 has a frame 2.
It is supported by and stretched horizontally. Below the screen 1, a cleaning pipe 3, a feed roller 4, a take-up roller 5, a cleaning sheet 6, etc. are provided so as to be horizontally movable along the printing direction.

That is, both ends of the cleaning pipe 3 are fitted into and fixed to a support portion 8 formed between both ends of the central portions of the pair of side plates 7. At the top of the cleaning pipe 3, suction holes 9 are arranged in a row along the fine direction. A feed roller 4 is rotatably supported by a shaft 10 between one side of the side plate 7, and a take-up roller 5 is rotatably supported by a shaft 11 between the other side of the side plate 7. The cleaning sheet 6 is formed into a mesh shape of cloth, paper, etc.
One end of it is fixed to the feed roller 4 and wound up,
The other end is hung over the top of the cleaning pipe 3 so as to close the suction hole 9 and is fixed to the winding roller 5 . The range in which the suction holes 9 are formed and the width of the cleaning sheet 6 are set to be approximately equal to the radius of the screen 1. The take-up roller 5 can be rotated by a constant angle by a driving means such as a motor or a ratchet mechanism supported by the side plate 7. Side plate 7
etc. are supported horizontally movably on the main body of the device (not shown),
Drive means (not shown) consisting of a motor, power transmission means, etc.
It is designed to be driven by. A suction hole 12 is formed in one support portion 8 of the side plate 7 , one end of a suction pipe 13 is connected to the suction hole 12 , and the other end of the suction pipe 13 is connected to a vacuum pump 14 . 15 is cream solder supplied onto the screen 1.

The operation of the above configuration will be described below.

During cream solder printing, move the side plate 7 etc. to a position where it does not interfere with printing, place a printed circuit board (not shown) below the screen 1, and print on the printed circuit board using the cream solder printing device as in the conventional example above. . After printing is completed, air is sucked from the suction hole 9 of the cleaning pipe 3 through the suction pipe 13 etc. by driving the vacuum pump 14, and the side plate 7 etc. are horizontally moved in the direction of arrow A by the driving means. Accordingly, the screen 1 is adsorbed to the cleaning sheet 6 on the cleaning pipe 3 through the mesh-like cleaning sheet 6, and the side plate 7, the cleaning pipe 4, the cleaning sheet 6, etc. can be horizontally moved while being brought into close contact with the cleaning sheet 6. This results in
The cream solder 15 protruding from the lower surface of the screen 1 can be wiped off with a cleaning sheet 6. Further, the cream solder 15 remaining inside the slit hole of the screen 1 can also be suctioned together with air to be attached to the cleaning sheet 6 and removed.

When the side plate 7, etc. □ moves horizontally in the six directions of arrows and reaches the other end of the screen 1, the take-up roller 5 is slightly rotated in the direction of arrow B by the driving means, and the cleaning sheet 6 is sent slightly in the direction of arrow C. . As a result, the cream solder 15 adhering to the cleaning sheet 6 is removed from the contact portion with the screen 1, and a new portion of the cleaning sheet 6 is sent to the contact portion with the screen 1, waiting for the next cleaning operation. After the next printing is completed, cleaning can be performed in the same manner by horizontally moving the side plate 7 and the like in the opposite direction of arrow A. Thereafter, by repeating the above operations, the screen 1 can be cleaned every time printing is completed.

According to the embodiment described above, the screen 1 can be sucked through the suction hole 9 of the cleaning pipe 3 and brought into close contact with the cleaning sheet 6 over the entire length of the screen, and as the cleaning sheet 6 etc. moves horizontally, The cream solder 15 protruding from the bottom surface of the screen 1 can be completely wiped off. Further, the cream solder 15 remaining inside the slit hole of the screen 1 can also be sucked and adhered to the cleaning sheet 6 and removed.

In addition, since the roll-shaped cleaning sheet 6 is used, even during continuous use, the screen 1 is always kept in close contact with a new part of the cleaning sheet 6 to solder the cream solder 15.
It has the advantage that it can be wiped off reliably.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, as described in detail, a cleaning pipe or the like is positioned below the screen, and the suction means suctions the screen through the cleaning sheet from the suction hole of the cleaning pipe to bring it into close contact with the cleaning sheet. and move horizontally. As a result, even if the height of the screen changes, the cream solder protruding from the bottom of the screen can be completely wiped off over the entire surface of the screen, and the cream solder remaining inside the slit holes of the screen can also be wiped away. It can be removed by suction and adhering to a cleaning sheet. Furthermore, by using a roll-shaped cleaning sheet, the screen can always be brought into close contact with a new part of the cleaning sheet even during continuous use, and the cream solder can be reliably wiped off.

Therefore, cream solder printing can be performed well.

[Brief explanation of the drawing]

1 and 2 show a cleaning device in one embodiment of the present invention, FIG. 1 is a schematic front view, and FIG.
An enlarged sectional view taken along the line ■-■ in the figure, and FIGS. 3 and 4 show a conventional cleaning device, with FIG. 3 being a schematic front view and FIG. 4 being a schematic side view. 1...Screen, 3...Cleaning pipe,
4...Feeding roller, 5...Take-up roller, 6
...Cleaning sheet, 7...Side plate, 9...Suction hole, 13...Suction pipe, 14...Vacuum pump. Name of agent: Patent attorney Osamu Koebi Akira Bakaka 2 1st picture 2nd picture

Claims (1)

[Claims] A cleaning pipe supported horizontally movably below the printing screen and provided with a row of suction holes that can face the screen, and movable and rotatable integrally with the cleaning pipe. a supported feed-out roller and take-up roller; a mesh-like cleaning sheet that is wound around the feed-out roller, hung on the cleaning pipe so as to close its suction hole, and wound around the take-up roller; a suction means for suctioning the screen from the suction hole of the cleaning pipe through the cleaning sheet and bringing it into close contact with the cleaning sheet; the cleaning pipe;
A cleaning device comprising a feed roller, a take-up roller, and a drive means for integrally horizontally moving a cleaning sheet.