JPS63306040A - Registering device for hard board printing machine - Google Patents

Abstract

PURPOSE:To set a hard board at an accurate position on a print base by slowly rotating a registering member. CONSTITUTION:Front and lateral registering devices 6, 7 for registering a hard board laterally and forwardly are provided in a hard board printing machine for printing the board, such as a printed circuit board or the like. In the devices 6, 7, rotary members 17, 30 are rotated around an axis perpendicular to a print base 3 for supporting the board 2. Lateral and forward registering pins 21, 34 are eccentrically supported on the members 17, 30, respectively, and protruded from the base 3 to be movable to an operating position to be engaged with the side edge of the board 2 and a nonoperating position not to be protruded from the base. An air cylinder 19 for the pin corresponding to the width of the board 2 of the pins 21 is selected by a switch. After elevational air cylinders 19, 32 move the pins 21, 34 to the operating position, rotary air cylinders 34, 37 rotate the members 17, 30, respectively.

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention relates to a hard board printing machine that prints on hard boards such as printed wiring boards, and particularly relates to a hard board printing machine that prints on hard boards such as printed wiring boards, and particularly for lateral or forward registration of hard boards. This invention relates to a registration device for the purpose of

(Prior Art) As a conventional registration device, for example, as shown in FIG. Also known is a device in which the front registering claw 53 of the hard board 2 is rotated around the horizontal axis to register the rigid board 2 in the forward direction.

(Problems to be Solved by the Invention) However, according to the conventional tool alignment device, as shown in FIG. There was a problem in that the upper portion of the lateral groove 51 was deformed by the pressing force, which adversely affected the printing result. Further, in the front registration device, the front registration claw 53 is rotated to the upright position.
collides with the hard board 2 at high speed, so the hard board 2
There was a problem in that the target position was moved back by a certain amount, making the registered position inaccurate.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a printed base for supporting a rigid board, and a rotatable base that rotates around an axis perpendicular to the printed base. a rotatable member;
a registration member eccentrically supported on the rotating member and movable between an active position in which it protrudes from the print base and can engage the side edge of the rigid board and a non-operation position in which it does not protrude from the print base; and a drive mechanism for rotating the rotating member after it has been moved to the operating position.

(Operation) In the above solution, the rigid board is accurately registered by the gradual rotation of the registration member around the axis of the rotation member.

(Example) Hereinafter, an example in which the present invention is embodied in a screen printing machine for hard boards will be described based on the drawings.

As shown in Figure 1.2, a print base 3 for supporting a hard board 2 such as a printed wiring board is installed on the top surface of the frame 1, and a carry-in belt 4 and a carry-out belt 5 are installed in front and behind the frame 1. is located. The print base 3 is provided with a machine registration device 6, a front registration device 7, and a rear registration device 8 for registering the rigid board 2 at a predetermined position on the print base 3. A large number of suction holes 9 are formed which are connected to a suction device (not shown) to suction and hold the hard board 2 on the print base 3 after alignment. Then, the squeegee 10 and the doctor 11 in the adsorbed state
Printing is performed on the surface of the hard board 2 via the screen plate 12 by alternating operation with the screen plate 12.

As shown in FIG. 1.3.4, the print base 3 has a pair of left and right grooves 13 that accommodate the carry-out belt 5 in a retractable manner.
(only one of which is shown) is formed, and the tool abutment device 6 of this embodiment is installed on the side of one of the grooves 13.

The tool alignment device 6 includes a laterally extending substrate 14 incorporated in the print base 3 so that the same plane is formed.
It is equipped with A support 15 is fixed to the back surface of the substrate 14, and a plurality of through holes 16 (seven in this embodiment) are formed therein on a straight line perpendicular to the direction in which the rigid board 2 is fed. . Each through hole 16 has a rotating member 1
7 are respectively rotatably inserted and supported around an axis perpendicular to the print base 3, and gears 18 that engage with each other are formed at their upper ends, and an air cylinder 19 for lifting and lowering is attached to their lower ends. ing.

A device abutment pin 21 is inserted into and supported by the eccentric hole 20 formed in each rotating member 17 so as to be movable up and down, and a piston rod 22 of each air cylinder 19 for lifting is connected to the lower end thereof. As the piston rod 22 protrudes and retracts, the tool abutment pin 21 protrudes from the top surface of the print base 3 and is placed in an operating position where it can be held on the side edge of the hard board 2, and at a working position where it does not protrude from the top surface of the print base 3. It is adapted to be moved to a non-operative position.

In addition, each lifting air cylinder 19 is selected on the front of the frame 1 of the printing press so that one of the plurality of machine abutting pins 21 corresponding to the width of the rigid board 2 is activated. A selection switch 23 is provided for activating the switch.

A rotating air cylinder 24 is installed on one end surface of the support body 15, and a rack 27 is installed and supported between both ends of the piston rod 25 via a plate 26. The rack 27 is engaged with the gear 18 of the outermost rotating member 17, and due to the reciprocating operation of the piston rod 25, each rotating member 17 is rotated approximately 180 mm through the engagement between the rack 27 and each gear 18. As a result, each tool abutting pin 21 is rotated about the axis of the rotating member 17 between an outer position shown by a solid line and an inner position shown by a chain line in FIG. 3. Therefore, when the piston rod 25 is moved in the direction of the arrow in FIG. 3 after one tool abutment pin 21 has been placed in the operating position, as the tool abutment pin 21 moves to the inner position, The rigid board 2 is laterally moved slightly inward from the carry-in position, and the rigid board 2 is laterally aligned.

A plurality of optical sensors, etc., are installed on the board 14 at a position near each tool abutting pin 21 to detect the lateral edge of the hard board 2 in a state of being correctly engaged with the tool abutting pin 21 at the inside position. A detector 28 is provided, and the printing process by the squeegee 10 is started based on a signal from the detector 28.

On the other hand, as shown in FIG. 1.5, at the end of the print base 3 in the feeding direction, there are two sets of front registration devices 7 for registering the hard board 2 in the front direction in the left and right directions. (Only one pair is shown in FIG. 1). Each preregistration device 7 includes a case 29 fixed to the lower surface of the print base 3, and a rotary member 30 is accommodated and supported in the case 29 so as to be rotatable around an axis perpendicular to the print base 3. ing. A gear 31 is formed at the lower end of the rotating member 30, and an air cylinder 32 for raising and lowering is attached.

A front alignment pin 34 is inserted through a key 35 into an eccentric hole 33 formed in each rotating member 30 so as to be relatively unrotatable and movable up and down. 36 are connected. As each piston loft 36 protrudes and retracts, the front alignment pin 34 is placed in a non-operating position where it does not protrude from the upper surface of the print base 3 as shown in FIG. 5, and as shown in FIG. 6(a).
As shown in FIG. 3, it protrudes from the upper surface of the print base 3 and is moved to an operating position where it can be held on the front edge of the rigid board 2.

A pair of rotating air cylinders 37 (fifth
A rack 39, which is commonly engaged with the gear 31 of each rotating member 30, is installed between the piston rods 38 via a plate 46. After each front alignment pin 34 is placed in the operating position, the rotation air cylinder 37 is operated, and each rotation member 30 is rotated approximately 180 degrees through the engagement of each gear 31 and rack 39. 6(a) and the inner position shown in FIG. 6(b) about the axis of the rotating member 30. rotationally arranged. Therefore, upon movement of each front abutment pin 34 to the inner position, due to the engagement of the front abutment pin 34 with the front edge of the rigid board 2,
The rigid board 2 is moved slightly rearward from the carry-in position so that the rigid board 2 is registered in the forward direction. Note that, in the vicinity of each front alignment pin 34, the print base 3 is provided with a detector 4 for detecting the front edge of the hard board 2, similar to the tool alignment device 6.
0 (see Figure 1).

A pressing piece 42 that can be fitted into the fitting hole 41 of the print base 3 is fixed to the upper end of each front alignment pin 34, and a jaw part 43 is cut out slightly deeper than the thickness of the hard board 2 on the back surface of the pressing piece 42. It is formed.

When the piston rod 36 of the elevating air cylinder 32 retracts with a smaller stroke than when it protrudes with the part abutting pin 34 disposed at the inner position, as shown in FIG. 6(c), Then, the front edge of the hard board 2 is pressed onto the print base 3 by the jaws 43 so that the deformed portion is corrected and removed.

Note that the rear registration device 8 is configured to raise and lower a rear register mold 44 disposed between the carrying-in belt 4 and the unloading belt 5 at positions corresponding to the respective grooves 13 of the print base 3, and to raise and lower the rear register mold 44. In order to do this, the horizontal shaft 45 is connected to an air cylinder (not shown), and the rear register of the hard board 2 is adjusted when the rear register mold 44 is rotated upright.

Next, the registration function of the hard board screen printing machine configured as described above will be explained.

Now, when the hard board 2 is carried onto the print base 3 by the carry-in belt 4, the rear register mold 44 of the rear register device 8 is first rotated upright, and then the register mold 44 and the rear edge of the hard board 2 are rotated. The rearward registration of the rigid board 2 is performed by the engagement of -.

Next, the air cylinder 32 for lifting and lowering the part alignment device 7
The piston rod 36 is projected, and the part abutting pin 3
4 is protrudingly arranged in the operating position shown in FIG. 6(a). In this state, when the rotating air cylinder 37 is operated and the rotating member 30 is rotated through the engagement between the rack 39 and the gear 31, each component abutting pin 34 in the operating position is moved as shown in FIG. The hard board 2 is rotated to the inner position shown in FIG. 1B, and the hard board 2 is brought into contact with the hard board 2 by the engagement of the part abutment pin 34 with the front edge of the hard board 2 at that time.

In this case, since the hard board 2 is moved gently as the part abutting pin 340 rotates, the problem of the hard board 2 being set in an incorrect position away from the part abutting pin 34 can be reduced. Can be done. Moreover, if the position of the rigid board 2 after registration is incorrect, the next printing process will not be started based on the signal from the detector 40, so there is no risk of producing defective printed products.

After the parts are abutted, the pressing piece 42 is lowered together with the part abutting pin 34 by the retracting operation of the lifting air cylinder 32, as shown in FIG. 6(c). The front edge of the rigid board 2 is pressed against the upper surface of the print base 3 by the jaws 43 . As a result, the deformation of the hard board 2 is corrected, and the entire back surface of the hard board 2 is joined to the top surface of the print base 3.

When the operation of the part alignment device Wt7 is completed, the elevating air cylinder 19 of the horizontal alignment device 6 selected in advance by operating the selection switch 23 is activated, and one horizontal alignment pin 21 is moved. It is protrudingly arranged in the working position. In this state, when the piston rod 25 is moved in the direction of the arrow in FIG. 3 by the operation of the rotating air cylinder 24, each lateral The positioning pins 21 are rotated to the inner position, and the horizontal positioning pins 21 located at the working position engage with the hard board 20 when the hard board 20 is turned sideways.
lateral registration is performed.

In this case, similarly to when aligning parts, the hard board 2 is set in an accurate position by the gentle rotation of the horizontal alignment pin 21, and the detector 28 is activated to prevent the occurrence of defective printed products. It can be prevented. Moreover, since a plurality of horizontal alignment pins 21 are arranged on the left and right, even if the size of the hard board 2 or screen plate 12 changes, the horizontal alignment pins 21 that match the sizes of the hard board 2 or the screen plate 12 change.
If you select 1, you can always print with the rigid board 2 placed in the center of the print base 3, eliminating the need for the troublesome work of changing the position of the screen plate 12, and making it easier for the screen printing machine. The rigid board 2 can be carried in and out of printing-related equipment such as a leveling machine, dryer, or etcher installed in front or behind the board without any hindrance. Note that the jaws 43 of the pressing piece 42 in the tool abutting device 7 are formed slightly deeper than the thickness of the hard board 2, so that the hard board 2 is slightly moved in the lateral direction when the tool abuts. is allowed.

When the rear, front and lateral registrations are thus completed, the suction device is activated and the rigid board 2 is attracted to the upper surface of the print base 3 by the negative pressure acting on each suction hole 9. In this case, the pressing piece 4 of the front registration device 7
Since the entire hard board 2 is joined to the print base 3 by the pressing action of 2, the suction force is efficiently applied to accurately and reliably hold the hard board 2 on the print base 3 at each of the register positions mentioned above. be able to.

After the hard board 2 is suctioned and held, the rear claws 44 of the rear registration device W8 are rotated to fall down, and the registration pins 34 of the front and tool registration devices 6, 7 are rotated.
21 are respectively arranged at non-operating positions in the reverse order from the time of registration. After confirming the correct registration position of the hard board 2 based on No. 18 from each detector 28, 40, the squeegee 10 and the doctor 11 are operated alternately to move the hard board 2 through the screen plate 12. Printing is done on the surface. At this time, the base Fi of the equipment 5 alignment device 6
14 forms the same plane as the print base 3, deformation of the hard board 2 due to the pressing force of the squeegee 10 is prevented, and accurate printing can always be performed.

Effects of the Invention As detailed above, in this invention, the rigid board can be set at an accurate position on the print base by the gentle rotation of the registration member, and the rigid board can be set at an accurate position on the print base by the gentle rotation of the registration member. This has the excellent effect of preventing deformation and allowing accurate printing.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a print base showing an embodiment embodying the present invention, Fig. 2 is a front view showing the entire screen printing machine for hard board, and Fig. 3 is a plan view of the machine alignment device. , FIG. 4 is a partially cutaway front view of the tool registration device, FIG. 5 is a sectional view showing the front registration device, and FIG.
) to (c) are sectional views showing different operating states of the front registration device, FIG. 7 is a perspective view showing a conventional registration device, and FIG. 8 is a sectional view showing a conventional printing operation. Hard board 2, print base 3, machine alignment device 6
, front registration device 7, squeegee 10, rotating member 17,
30, lifting air cylinder 19° 32, equipment abutting pin 21, rotating air cylinder 24.37, detector 2B,
40, Front registration pin 34°

Claims (1)

[Claims] 1. A hard board printing machine that prints on a hard board (2) such as a printed wiring board, comprising: a print base (3) for supporting the hard board (2); and a print base (3) for supporting the hard board (2). ), a rotating member (17, 30) that is rotatable around an axis perpendicular to the rotating member (
17, 30) and is movable between an active position where it protrudes from the print base (3) and can engage the side edge of the rigid board (2), and a non-operative position where it does not protrude from the print base (3). a registration member (21, 34); and a drive mechanism (19, 23, 24) for rotating the rotation member (17, 30) after moving the registration member (21, 34) to the operating position. , 32, 37). 2. A plurality of the registration members (21) are arranged in a row on a straight line orthogonal to the feeding direction of the hard board (2), and Rigid board printing according to claim 1, characterized in that the drive mechanism includes a selection switch (23) for selectively actuating any one of the respective registration members (21). 3. The drive mechanism includes a rotating air cylinder (24, 37) for driving the rotating member (17, 30), and a lifting mechanism for driving the register member (21, 34) up and down. A registration device for a hard board printing press according to claim 1 or 3, characterized in that the registration device is comprised of an air cylinder (19, 32).