JPH05362Y2 - - Google Patents

Description

[Detailed explanation of the invention] Purpose of the invention (industrial application field) This invention relates to a hard board printing machine that prints on hard boards such as printed wiring boards, and in particular, to register the hard boards in the front direction. The present invention relates to a pre-registration device.

(Prior art) As a conventional front registration device, for example, the seventh
As shown in the figure, a device is known in which the front registration of the hard board 2 is performed by a front registration claw 53 that rotates up and down around a horizontal axis 54.

(Problem to be Solved by the Invention) However, in the conventional front registration device, the front registration claw 53 rotated to the upright position collides with the front edge of the hard board 2 at high speed. There was a problem in that the target position was moved back a certain amount, making the registered position inaccurate. Furthermore, when printing on a hard board 2 whose front edge is curved and deformed, the deformed part rises above the print base 3, which reduces the suction effect of each suction hole 9 of the print base 3 and causes misalignment during printing. There was also a problem that it was easy to cause.

Structure of the invention (means for solving the problems) In order to solve the above problems, this invention includes a print base equipped with suction holes for sucking and holding a hard board, and a print base that is perpendicular to the print base. A rotating member that can rotate around the axis, an inactive position that is eccentrically supported on the rotating member and does not protrude from the print base, and a non-active position that protrudes from the print base and can engage with the leading edge of the rigid board in the feeding direction. a registration member that can be raised and lowered to an intermediate position between the two operating positions; a pressing member that presses the rigid board against the print base when the registration member is lowered from the operating position to the intermediate position; It comprises a drive mechanism for raising the registration member from the non-operating position to the working position, then rotating the rotating member, and then lowering the registration member from the working position to the intermediate position.

(Operation) In the above solution, the front register of the rigid board is accurately performed by the gentle rotation of the register member around the axis of the rotary member, and after the front register, the pressing member The deformation of the hard board is corrected and removed, and the hard board is accurately and reliably suctioned and held at the registered position on the print base.

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

As shown in Figures 1 and 2, a print base 3 for supporting a hard board 2 such as a printed wiring board is installed on the upper 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 lateral 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. Hard board 2 after alignment
A large number of suction holes 9 are formed in communication with a suction device (not shown) to suction and hold the print base 3 on the print base 3. In this suction state, printing is performed on the surface of the hard board 2 via the screen plate 12 by alternately operating the squeegee 10 and the doctor 11.

As shown in FIGS. 1, 3, and 4, the print base 3 is formed with a pair of left and right grooves 13 (only one of which is shown) that accommodates the carry-out belt 5 in a retractable manner. A lateral registration device 6 of this embodiment is installed. The lateral registration device 6 aligns the print base 3 so that the same plane is formed.
It includes a laterally extending substrate 14 incorporated into the. 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. . A rotating member 17 is inserted into each through hole 16 and supported so as to be rotatable around an axis perpendicular to the print base 3, and gears 1 that engage with each other are provided at their upper ends.
8 is formed, and a lifting air cylinder 19 is attached to the lower end.

Lateral registration pins 21 are inserted and supported in eccentric holes 20 formed in each rotating member 17 so as to be movable up and down, and piston rods 22 of each air cylinder 19 for elevation are connected to their lower ends. As the piston rod 22 protrudes and retracts, the lateral register pin 21 protrudes from the top surface of the print base 3 and engages with the lateral edge of the hard board 2, and a non-operating position that does not protrude from the top surface of the print base 3 is formed. It is adapted to be moved to a working position. In addition, each lifting air cylinder 19 is selected at the front of the frame 1 of the printing press so that one of the plurality of horizontal register 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 16, and a rack 27 is installed and supported between both ends of the piston rod 25 via a mounting plate 26. The rack 27 is engaged with the gear 18 of the outermost rotating member 17, and each rotating member 17 is rotated through an angle of approximately 180 degrees through the engagement of the rack 27 with each gear 18 due to the reciprocating operation of the piston rod 25. As a result, each lateral register 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. Therefore, when the piston rod 25 is moved in the direction of the arrow in FIG. 3 after one lateral register pin 21 has been placed in the working position, the lateral register pin 21 is moved to the inner position. Accordingly, the rigid board 2 is laterally moved slightly inward from the carry-in position, and the rigid board 2 is aligned in the lateral direction.

At a position near each lateral register pin 21, the board 14 has a lateral register pin 2 at an inner position.
A plurality of detectors 28 including optical sensors are provided to detect the side edges of the rigid board 2 in a state in which the hard board 2 is properly engaged with the squeegee 10 based on signals from the detectors 28. The printing process is about to begin.

On the other hand, as shown in FIGS. 1 and 5, two sets of front registration devices 7 are arranged in the left-right direction at the front end of the print base 3 in the feeding direction for registering the hard board 2 in the front direction. (Only one pair is shown in Figure 1). Each front registration device 7 includes a case 29 fixed to the lower surface of the print base 3, and a rotating member 30 is housed and supported in the case 29 so as to be rotatable around an axis perpendicular to the print base 3. There is. 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 registration pin 34 is inserted and supported via a key 35 into an eccentric hole 33 formed in each rotating member 30 so as to be able to move up and down without being able to rotate relatively, and a piston rod 36 of an air cylinder 32 for lifting and lowering is installed at the lower end of the pin 34. connected. As each piston rod 36 protrudes and retracts, the front registration pin 34 moves to a non-operating position where it does not protrude from the top surface of the print base 3 as shown in FIG. 5, and to the top surface of the print base 3 as shown in FIG. It is adapted to be raised and lowered to an operative position in which it protrudes more and can engage with the front edge of the rigid board 2, and an intermediate position between the non-operative position and the operative position as shown in FIG. 6c.

A pair of rotating air cylinders 37 (only one shown in FIG. 5) is installed below the print base 3 so as to sandwich each front registration device 7 from the left and right sides.
Each rotating member 3 is provided between the piston rods 38.
a rack 39 commonly engaged with the gear 31 of 0;
is installed via a mounting plate 46. After each front registration pin 34 is placed at the operating position, the rotation air cylinder 37 is operated, and each rotation member 30 is rotated at an angle of approximately 180 degrees through the engagement of each gear 31 and rack 39. As a result, each front registration pin 34 is rotated about the axis of the rotating member 30 between an outer position shown in FIG. 6a and an inner position shown in FIG. 6b.
Therefore, when each register pin 34 moves to the inside position, the rigid board 2 is moved slightly rearward from the carry-in position due to the engagement between the register pin 34 and the front edge of the rigid board 2. 2 forward registration is performed. Note that, similar to the lateral registration device 6, a detector 40 for detecting the front edge of the rigid board 2 is provided on the print base 3 at a position near each front registration pin 34 (the first (see figure).

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 registration pin 34, and a jaw part 43 is cut out slightly deeper than the thickness of the hard board 2 on the lower surface thereof. has been done.
When the piston rod 36 of the elevating air cylinder 32 is retracted with a smaller stroke than when it was protruded, and the front registration pin 34 is lowered to the intermediate position, as shown in FIG. The front edge of the print base 3 is pressed by the jaws 43 onto the print base 3 to correct the deformed portion.

Note that the rear registration device 8 operates a rear register pawl 44 disposed between the carry-in belt 4 and the carry-out belt 5 at positions corresponding to the respective grooves 13 of the print base 3, and rotates the rear register pawl 44 up and down. A horizontal shaft 4 connected to an air cylinder (not shown) to
5, and the rear register of the hard board 2 is adjusted when the rear register claw 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, first the rear register claw 44 of the rear register device 8 is rotated upright, and then the register claw 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 the hard board 2.

Then, the piston rod 36 of the lifting air cylinder 32 of the front registration device 7 is projected, and the front registration pin 34 is placed in the working position shown in FIG. 6a. 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 front register pin 34 at the operating position is moved to the sixth position.
The rigid board 2 is pivoted to the inner position shown in FIG.

In this case, the rigid board 2 is connected to the front registration pin 3.
Since the hard board 2 is moved gently as the front registration pin 4 rotates, the problem of the hard board 2 being supported in an incorrect position away from the front registration pin 34 can be reduced. Well, if the position of the rigid board 2 after registration is not correct, the detector 40
Since the next printing process is not started based on the signal, there is no risk of producing defective printed products.

After the forward registration, the lifting air cylinder 32 is retracted, as shown in FIG. 6c.
The pressing piece 42 is lowered together with the front registration pin 34, and the front edge of the hard board 2 is pressed against the upper surface of the print base 3 by the jaws 43 of the pressing piece 42. 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 front registration device 7 is completed, the elevating air cylinder 19 of the lateral registration device 6 selected in advance by operating the selection switch 23 is then activated.
is actuated, and one lateral register pin 21 is projected and placed in the working position. In this state, the piston rod 25 is rotated by the operation of the rotating air cylinder 24.
is moved in the direction of the arrow in Figure 3, the rack 27
Through the rotation of the rotary member 17 due to engagement with the gear 18, each lateral register pin 21 is rotatably arranged in the inner position, and the lateral register pin 21 disposed in the working position is connected to the hard board 2. Lateral registration of the rigid board 2 is performed by engaging the lateral edges of the rigid board 2 .

In this case, as in the case of front registration, the hard board 2 is rotated slowly by the lateral registration pin 21.
is set at the correct position, and the detector 2
8 can prevent the occurrence of defective printed products. Moreover, the horizontal registration pin 21
Since multiple pins are arranged on the left and right, even if the size of the rigid board 2 or screen plate 12 changes, the horizontal register pins 2 that match those sizes can be used.
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 hard 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. In addition, since the jaw portion 43 of the pressing piece 42 in the front registration device 7 is formed slightly deeper than the thickness of the hard board 2, this allows the hard board 2 to be slightly stretched in the lateral direction during lateral registration. Movement 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, since the entire hard board 2 is joined to the print base 3 by the pressing action of the pressing piece 42 of the front registration device 7, the suction force is efficiently applied to move the hard board 2 to each of the above-mentioned registration positions. can be held accurately and reliably on the print base 3.

After the hard board 2 is sucked and held, the rear register claw 44 of the rear register device 8 is rotated to fall down, and the register pins 34 and 21 of the front and lateral register devices 6 and 7 are brought into register. They are placed at their non-active positions in reverse order. and,
After the correct registration position of the rigid board 2 is confirmed based on the signals from each detector 28 and 40, the squeegee 10 and the doctor 11 are operated alternately to print on the surface of the rigid board 2 via the screen plate 12. will be held. At this time, since the substrate 14 of the lateral registration device 6 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 deformation of the rigid board can be corrected and removed by the pressing member. This provides an excellent effect in that the rigid board can be accurately and reliably held in the registered position on the print base.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a print base showing an embodiment of this invention, Fig. 2 is a front view showing the entire hard board screen printing machine, and Fig. 3 is a perspective view of a print base portion showing an embodiment of this invention.
The figure is a plan view of the lateral registration device, FIG. 4 is a partially cutaway front view of the lateral registration device, FIG. 5 is a sectional view showing the front registration device, and FIGS. FIG. 7 is a cross-sectional view showing different operating states, and FIG. 7 is a perspective view showing a conventional front registration device. Hard board 2, print base 3, front registration device 7, suction hole 9, rotation member 30, lifting air cylinder 32, rotation air cylinder 37, front registration pin 34, pressing piece 42.

Claims (1)

[Claims for Utility Model Registration] 1. In a hard board printing machine that prints on a hard board 2 such as a printed wiring board, a print base 3 equipped with a suction hole 9 for sucking and holding the hard board 2, and the print base 3 A rotating member 30 that is rotatable around an axis perpendicular to the base 3; an inactive position that is eccentrically supported on the rotating member 30 and does not protrude from the print base 3; An operating position that can engage with the front edge of the board 2 in the feeding direction, and a registering member 34 that can be raised and lowered to an intermediate position between these two positions, and a rigid After the pressing member 42 that presses the board 2 against the print base 3 and the registering member 34 are raised from the non-operating position to the working position, the rotating member 30 is rotated, and then the registering member 34 is rotated. a drive mechanism 32 for lowering from the operating position to an intermediate position;
37. 2. The front registration device for a hard board printing machine according to claim 1, wherein the pressing member 42 has a jaw portion 43 slightly deeper than the thickness of the hard board 2 on its lower surface. .