JP2009234141A - Screen process printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a burden of installation work, by forming an installation structure of a squeegee as a simple structure. <P>SOLUTION: An engaging pin 22 having a large diameter part 22B and a small diameter part 22A and a lock pin 23 are erected in an upper part of a squeegee body 14 for fixing the squeegee 13. A fixing hole 17 communicating a thin diameter part 17A for fitting the small diameter part 22A with a thick diameter part 17B for fitting the large diameter part 22B of the engaging pin 22 in response to the engaging pin 22 and a guide hole 18 for the lock pin, are formed in a squeegee installation body 8. The large diameter part 22B of the respective engaging pins 22 is fitted to the respective thick diameter part 17B of the fixing hole 17. The squeegee body 14 is slid after fitting the lock pin 23 to the guide hole 18, and the small diameter part 22A of the respective engaging pins 22 is fitted to the respective thin diameter parts 17A of the fixing hole 17. An air cylinder 25 is arranged for pressing the lock pin 23 in the direction so that this fitting is not disconnected. <P>COPYRIGHT: (C)2010,JPO&INPIT

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, according to a first aspect of the present invention, there is provided a screen printing machine that applies a coating agent on a screen board to a printed board through a printing pattern hole provided in the screen board by moving a squeegee. And at least two pins having a large-diameter portion and a small-diameter portion on the squeegee body fixed to the squeegee so that the squeegee is inclined at a predetermined angle, and the squeegee mounting body corresponds to the pin. Then, two or more fixing holes are formed in which the large diameter portion through which the large diameter portion of the pin passes and the small diameter portion into which the small diameter portion is fitted are formed, and each of the fixing holes provided in the squeegee mounting body is formed. After passing the large diameter part of each pin erected on the squeegee body in the diameter part, the squeegee body is slid, and the squeegee body is attached to each small diameter part of the fixing hole provided in the squeegee mounting body. Characterized in that a locking mechanism for locking to maintain this state, as the fitting is not disengaged with fitting the small diameter portion of each pin was set.

  According to a second aspect of the present invention, there is provided a screen printing machine that applies a coating agent on a screen board to a printed board through a printing pattern hole provided in the screen board by moving a squeegee on the screen board. At least two locking pins and lock pins each having a large diameter portion and a small diameter portion are erected on the upper portion of the squeegee body that fixes the squeegee so that the squeegee is inclined at a predetermined angle. Corresponding to the locking pin, two or more fixing holes that connect a large diameter portion into which the large diameter portion of the locking pin is fitted and a small diameter portion into which the small diameter portion is fitted, and a guide hole for the lock pin The large-diameter portion of each locking pin erected on the squeegee body is fitted into each large-diameter portion of the fixed hole provided in the squeegee mounting body, and the lock pin is fitted into the guide hole. Put together Then, the squeegee body is slid so that the small-diameter portions of the locking pins provided on the squeegee body are fitted into the small-diameter portions of the fixing hole provided in the squeegee mounting body, and the fitting is released. A lock mechanism for pressing the lock pin in a direction so as not to be provided is provided.

  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.

  Then, the squeegees 13 are held between the squeegee holding plate 10 and the squeegee holder 11 so that each squeegee 13 is inclined at a predetermined angle with respect to the screen plate 9A of the screen 9, and the both side plates 12 are held by the squeegees. 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.

  The screen 9 includes a screen plate 9A provided with print pattern holes formed corresponding to a desired circuit pattern of the printed circuit board, and a screen frame 9B having a rectangular shape in plan view 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. 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 (2)

  In a screen printing machine that applies a coating agent on a screen board to a printed circuit board through a printing pattern hole provided in the screen board by moving the squeegee, the squeegee is inclined at a predetermined angle with respect to the screen board. In this way, at least two or more pins 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 large diameter portion of the pin corresponding to the pin on the squeegee mounting body Two or more fixing holes are formed in communication between the large diameter portion through which the small diameter portion fits and the small diameter portion to which the small diameter portion is fitted, and the large diameter portion of the fixing hole provided in the squeegee mounting body is provided on the squeegee body. The small-diameter portion of each pin erected on the squeegee body in the small-diameter portion of the fixed hole provided in the squeegee mounting body by sliding the squeegee body after passing the large-diameter portion of each pin provided Screen printing machine, characterized in that a locking mechanism for locking to the fitting together is fitted to maintain this state so as not to come off.   In a screen printing machine that applies a coating agent on a screen board to a printed circuit board through a printing pattern hole provided in the screen board by moving the squeegee, the squeegee is inclined at a predetermined angle with respect to the screen board. In this way, at least two locking pins and a locking pin having a large diameter portion and a small diameter portion are provided on the upper portion of the squeegee body to which the squeegee is fixed, and the squeegee mounting body corresponds to the locking pin. And forming two or more fixing holes and a guide hole for the lock pin, each of which has a large-diameter portion into which the large-diameter portion of the locking pin is fitted and a thin-diameter portion into which the small-diameter portion is fitted. A large-diameter portion of each locking pin erected on the squeegee body is fitted to each large-diameter portion of the fixed hole provided in the body, and the lock pin is fitted to the guide hole, and then the squeegee body The Ride and fit the small diameter part of each locking pin erected on the squeegee body to each small diameter part of the fixed hole established in the squeegee mounting body and in a direction so that this fitting does not come off. A screen printing machine comprising a lock mechanism for pressing a lock pin.

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