JP5170654B2 - Screen printing machine - Google Patents

Description

The present invention relates to a screen printing machine that applies a coating agent on a screen plate onto a printed board through a printing pattern hole formed in the screen plate by moving a squeegee.

This type of screen printing machine is disclosed in, for example, Patent Document 1, but the structure for attaching the squeegee to the printing machine is complicated, and a burden is imposed on the installation work.
Japanese Patent Laid-Open No. 1-166961

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to reduce the burden of attachment work by simplifying the attachment structure of the squeegee.

Therefore the first invention, by moving a squeegee coating material on the screen plate, in a screen printing machine for applying through the print pattern holes opened on the screen plate onto the printed circuit board, to the screen plate together with the squeegee is erected at least two or more locking pins and locking pin and a large diameter portion and a small diameter portion at the top of the squeegee body fixed to said squeegee to a predetermined angle inclined Te, the squeegee mount Corresponding to the locking pin, two or more fixing holes in which a large-diameter portion into which the large-diameter portion of the locking pin fits and a narrow-diameter portion into which the small-diameter portion fits, and a guide for the lock pin a locking mechanism is provided to form a hole, it said with fitting the large diameter portion of the engaging pin provided upright on the squeegee body KakuFutoshi diameter of the fixing hole which is opened to the squeegee mount Rokkupi Is inserted into the guide hole and then the squeegee body is slid, and the small diameter portion of each locking pin erected on the squeegee body is inserted into each small diameter portion of the fixed hole provided in the squeegee mounting body. when the fitted, the locking mechanism in the direction in which the fitting is not disengaged, characterized in that the pressing the lock pin.

  According to the present invention, the mounting structure of the squeegee can be simplified, and the burden of mounting work can be reduced.

  The squeegee mechanism of the screen printing machine according to this embodiment will be described with reference to FIGS. 1 to 3. Reference numeral 1 denotes a squeegee that performs printing on a printed circuit board placed on a substrate support table (not shown) via the screen. It is a mechanism and has a cylinder mounting body 2 that is mounted on a screen printing machine so as to be movable in the Y-axis direction (left-right direction in FIG. 2). A connecting body 5 is fixed to the lower end of the rod of each cylinder 4 fixed to the cylinder mounting body 2, and a supporting body 6 is fixed to the connecting body 5 via connecting tools 3, 3. The squeegee mounting body 8 is supported so as to be swingable via the support shaft 7 and is fixed to the swinging body 8. Further, guide rods 6A and 6A are erected on the support 6, and the guide rods 6A and 6A are guided in the guide cylinders 2A and 2A provided on the cylinder mounting body 2 so as to be vertically movable.

The squeegees 13 are held between the squeegee presser plate 10 and the squeegee holder 11 so that the squeegees 13 are inclined at a predetermined angle with respect to the screen plate 9A of the screen 9, and the both squeegees 12 are pressed. A squeegee body 14 is configured by being fixed to the plate 10 and the squeegee holder 11, and the squeegee body 14 is detachably attached to the squeegee attachment body 8.

  That is, as shown in FIG. 3, the fixing holes 17 and 17 in which the narrow diameter portion 17A and the large diameter portion 17B are communicated are formed, and the elongated guide hole 18 is formed at a position between the fixing holes 17 and 17. The upper portions of the fixing holes 17 and 17 are communicated with the through holes 19 and 19 punched in the plate thickness direction in the vicinity of the end of the squeegee mounting body 8, and at the position between the through holes 19 and 19. The upper portion of the guide hole 18 is communicated with the hole 20 formed from one side. On the other hand, corresponding to the fixing holes 17, 17, the steel is provided with a large diameter portion 22 B at the upper end portion passing through the large diameter portion 17 B of the fixing holes 17, 17 and a small diameter portion 22 A fitted into the small diameter portion 17 A. At least two locking pins 22, 22 and a lock pin 23 having a large diameter portion 23 </ b> B and a small diameter portion 23 </ b> A passing through the guide hole 18 are erected on the upper surface of the squeegee holder 11.

  In this case, the relationship between the locking pin 22 and the fixing hole 17 will be described. The large-diameter portion 17B of the fixing hole 17 has the same diameter as or slightly larger than the large-diameter portion 22B of the locking pin 22, and the small diameter of the fixing hole 17 The portion 17A has the same diameter as or slightly larger than the small diameter portion 22A of the locking pin 22, and the small diameter portion 17A of the fixing hole 17 is smaller than the large diameter portion 22B of the locking pin 22. Also, the diameter of the semicircular portions at both ends of the guide hole 18 is the same as or slightly larger than the large diameter portion 23B of the lock pin 23.

  Reference numeral 25 denotes an air cylinder constituting a lock mechanism fixed to the squeegee mounting body 8 at a position corresponding to the guide hole 18. When the air cylinder 25 is actuated, a locking body 25 A provided at the tip of the rod is inserted into the lock pin via the groove 20. 23 can be brought into contact with the small diameter portion 23A. Reference numeral 26 denotes a detection sensor. When an air pressure exceeding a predetermined value when the air cylinder 25 is operating is detected, the contact state of the locking body 25A with the small-diameter portion 23A of the lock pin 23, that is, the squeegee correctly. It is detected that the squeegee body 14 is attached to the attachment body 8.

  Reference numeral 27 denotes a detection sensor constituted by a proximity sensor fixed to the squeegee mounting body 8. When the large diameter portion 22B of the locking pin 22 approaches the narrow diameter portion 17A of one fixing hole 17, the squeegee mounting body correctly. 8, it is detected that the squeegee body 14 is attached. Accordingly, it is possible to correctly detect that the squeegee body 14 is attached to the squeegee attachment body 8 by the both detection sensors 26 and 27.

Incidentally, the screen 9, from a screen plate 9A desired bored to correspond to the circuit pattern of the print pattern holes of the printed circuit board is provided, rectangular in plan view of the screen frame 9B surrounding the plate 9A Composed. The printed circuit board is placed on a substrate support table arranged at a printing position by a transport conveyor (not shown), and is unloaded from the substrate support table after printing.

  Next, a procedure for attaching the squeegee body 14 to the squeegee attachment body 8 will be described. As shown in FIGS. 4 and 5, the squeegee body 14 and the squeegee mounting body 8 are separated from each other, so that the work manager holds the squeegee body 14 in his hand as shown in FIGS. The large-diameter portions 22B of the respective locking pins 22 erected on the squeegee body 14 are inserted into the large-diameter portions 17B of the fixing holes 17 and 17 provided in the squeegee mounting body 8 while being aligned from below and guided therethrough. 18 through which the lock pin 23 is inserted.

  Next, as shown in FIG. 8, the work manager slides the squeegee body 14 so that each of the small diameter portions 17A of the fixing holes 17 and 17 provided in the squeegee mounting body 8 is erected on the squeegee body 14. The small-diameter portion 22A of the locking pin 22 is fitted and brought into contact with the left end portion of each small-diameter portion 17A, and the lock pin 23 is moved into contact with the left end portion of the guide hole 18.

  Thereafter, the operator operates the air cylinder 25 by pressing a touch panel switch formed on a monitor (not shown). Then, as shown in FIG. 2, the locking body 25 </ b> A provided at the rod tip of the air cylinder 25 is locked to the small diameter portion 23 </ b> A of the lock pin 23 via the groove 20, and this state is maintained. That is, the air is applied so that the lock pin 23 is pressed toward the left end of the guide hole 18 so that the small diameter portions 17A of the fixing holes 17 and 17 and the small diameter portions 22A of the locking pins 22 are not released. The locking body 25A of the cylinder 25 is locked to the small diameter portion 23A of the lock pin 23.

  For this reason, the attachment state of the squeegee body 14 to the squeegee attachment body 8 is locked, and the squeegee body 14 slides and the one locking pin 22 approaches the detection sensor 27 so that the squeegee body 14 is securely locked. The detection sensor 26 detects that the air cylinder 25 has been activated.

  The detection outputs of these detection sensors 26 and 27 can be checked by displaying them on the monitor, and it can be understood whether or not the squeegee body 14 is securely attached to the squeegee mounting body 8. Therefore, if the attachment is insufficient, the attachment operation can be performed again by repeatedly performing the attachment operation.

  As described above, after the squeegee body 14 is attached to the squeegee attachment body 8, the operation switch is operated to apply the cream solder as the coating agent on the printed circuit board.

  Although the embodiments of the present invention have been described above, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description, and the present invention is not limited to the various embodiments described above without departing from the spirit of the present invention. It encompasses alternatives, modifications or variations.

It is a principal part front view of the squeegee mechanism of a screen printing machine. It is a principal part side view of the squeegee mechanism of a screen printing machine. It is AA sectional drawing of FIG. It is a principal part front view of the squeegee mechanism in the state before attaching a squeegee body to a squeegee attachment body. It is AA sectional drawing of FIG. It is a principal part front view of the squeegee mechanism in the state which passed the large diameter part of the latching pin through the large diameter part of the fixing hole, when attaching a squeegee body to a squeegee attachment body. It is AA sectional drawing of FIG. FIG. 5 is a cross-sectional plan view of the squeegee mechanism in a state where the squeegee body is completely attached to the squeegee attachment body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Squeegee mechanism 8 Squeegee attachment body 9 Screen 13 Squeegee 14 Squeegee body 17 Fixing hole 17A Thin diameter part 17B Large diameter part 18 Guide hole 22 Locking pin 22A Small diameter part 22B Large diameter part 23 Lock pin 25 Air cylinder

Claims (1)

In a screen printing machine that applies a coating agent on a screen plate onto a printed circuit board through a printing pattern hole provided in the screen plate by moving the squeegee, the squeegee is inclined at a predetermined angle with respect to the screen plate . In this way, at least two locking pins and a locking pin having a large diameter portion and a small diameter portion are erected on the upper portion of the squeegee body to which the squeegee is fixed, and the squeegee mounting body corresponds to the locking pin. The lock pin is formed with two or more fixing holes and a guide hole for the lock pin communicating with a large diameter part to which the large diameter part of the locking pin is fitted and a small diameter part to which the small diameter part is fitted. provided, fitted to the lock pin with fitting the large diameter portion of the engaging pin provided upright on the squeegee body KakuFutoshi diameter of the fixing hole which is opened to the squeegee mounting member to said guide hole The squeegee element from the slide, when was the squeegee mounting body fitting the small diameter portion of the engaging pin provided upright on the squeegee body to each small-diameter portion of the Created the fixing holes engaged, the screen printing machine in which the locking mechanism in the direction in which the fitting is not disengaged, characterized in that the pressing the lock pin.

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