JPH0611770Y2 - Printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a printing device for printing cream solder on a printed circuit board.

[Prior Art and its Problems] A conventional setting of a print mask of a device for printing cream solder on a printed circuit board will be described with reference to FIG.
On the upper surfaces of the bases a and b, the mask frames c are temporarily fastened to the inner holes of the mounting plate d arranged at the four corners with the fixing screws e, and two holes on the outer side of the mounting plates d are fixed. It is attached and fixed to the bases a and b by f. Then, the printed board g is set at the printing position, and the pattern hole i of the printing mask h attached to the mask frame c and the pattern on the printed board g are slightly moved while the alignment position is visually observed from above. After deciding in step 2, the fixing screw e was tightened to complete the setting.

Therefore, at the time of mask maintenance such as cleaning of solder bleeding to the back side, the fixing screw e is removed and the mask frame c is taken out. Therefore, it is necessary to repeat the setting work again after cleaning is completed. However, there is a problem in that a large number of setting man-hours are required each time the print board g is changed, and the operating rate of the printing apparatus is reduced.

[Object of the Invention] The present invention has been made in view of the above circumstances, and an object thereof is to provide a printing apparatus that can be easily maintained in a short time and can improve the operating rate. is there.

[Points of the Invention] In order to achieve the above object, the present invention independently supports a pair of left and right pedestals erected on the floor of the apparatus and a horizontal shaft provided on the left pedestal. A left mask frame mounting member and a motor base, a motor mounted on the motor base and a screw rod connected to the shaft of the motor, and a bearing box provided at the tip of the screw rod and supported by the right side plate. A right side mask frame attaching member detachably attached to the right side base,
A squeegee that is attached downward to a nut that is screwed to the screw rod, a mask frame that is attached to the left and right mask frame attachment members, and has a mask attached to the squeegee.
A bearing box comprising an air cylinder attached to the apparatus floor for rotating the motor base around the horizontal axis, and a locking member for releasably locking the bearing box and the right mask frame mounting member. When the rod of the air cylinder is retracted with the right mask frame mounting member unlocked, the motor base, motor, screw rod, bearing box, and squeegee rotate around the horizontal axis as a fulcrum, and this squeegee rises. When the rod of the air cylinder is retracted with the bearing box and the right side mask frame mounting member locked while separating from the mask, the motor base, motor, screw rod, bearing box, squeegee, right side mask frame mounting member, mask frame The main point is that the mask and the left-side mask frame mounting member are integrally rotated about a horizontal axis as a fulcrum so that the back surface of the mask is raised.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

1 is an equipment floor, on which a left bed 2 and a right bed 3 are attached
And a bottom plate 4b having a pair of support bases 4a for fixing the horizontal shaft 4 are attached to the upper surface of the left base 2 and a pair of leg members of the left top plate 5 as a motor base are attached to the horizontal shaft 4. 5a is rotatably attached, and independently of this, the rotary leg 6a of the L-shaped left-side mask frame attachment member 6 is attached to the horizontal shaft 4.
Is rotatably mounted, does not move laterally, and is firmly attached. The vertical member of the left-side mask frame mounting member 6 contacts the right side surface of the support plate 4b so that the horizontal member is horizontal.

Further, a motor 7 is attached to the upper surface of the left top plate 5, and a ball screw 8 of high precision used in a machine tool or the like is connected to the shaft of the motor 7 and the right top plate 9 is attached to the tip of the ball screw 8. A bearing box 10 provided with is rotatably attached. The ball screw 8 has a ball screw nut 1
1 is screwed, and a squeegee 12 is attached downward to the ball screw nut 11. The squeegee 12 is guided by a guide rod (not shown) so as not to rotate around the ball screw 8.

In addition, the standing plate 13 is attached to the outside of the upper surface of the right base plate 3,
A stopper 13 for supporting the right side top plate 9 on the standing plate 13.
a is attached.

Further, as shown in FIG. 4, a guide pin 14 is provided upright on the upper surface of the right base plate 3, and a right mask frame mounting member 15 having a lateral elongated hole 14a fitted into the guide pin 14 is provided.
Is attached to the right side base plate 3 by a fixing screw 16.

Guide pins 17 and 18 are provided upright on the left and right mask frame attachment members 6 and 15, respectively, and a left joint member 1 having a fitting hole 17a fitted into the guide pins 17 is formed.
9 has a fitting hole 17a fitted into the guide pin 17, is attached to the left side edge of the mask frame 21 by a fixing screw 22 so that the mounting position can be adjusted, and a joint member 20 having a fitting hole 18a fitted to the guide pin 18 is provided. Is a mating hole 1
8a is fitted into the guide pin 18, and is attached to the right mask frame attachment member 15 by the fixing screw 23, and is attached to the right edge of the mask frame 21 by the fixing screw 24 so that the attachment position can be adjusted.

In addition, 25 is a mask attached to the mask frame 21, and 26
Is a pattern hole.

Further, the pin 27 is attached to the mounting plate 27 attached to the left top plate 5.
An air cylinder 28 having a rod 28a, the tip of which is pivotally supported by a, is mounted on a floor 1 of the apparatus 28b.
Installed on.

A substrate 29 is transported in the front-rear direction by a transport device (not shown) so that the substrate 29 approaches the lower surface of the mask 25 attached to the mask frame 21.

In addition, as shown in FIG. 3, the hook 30 is attached to the hook mounting plate 30a vertically downward on the right top plate 9 and the hook 30 is attached to the pin 3.
0b, the hook portion 30c of the hook 30 is attached to the right mask frame mounting member 15 by the wing nut 3.
It is designed to be attached by 1.

Next, the operation of this embodiment will be described.

Printing is performed as follows. That is, the substrate 29 is transported in the front-rear direction by a transport device (not shown), and the mask frame 21
When stopped at a predetermined position close to the lower surface of the ball, the motor 7 rotates the ball screw 8 into the ball screw nut 1.
1 moves in the lateral direction, and the squeegee 12 attached downward to the ball screw nut 11 rubs the upper surface of the mask 25, so that cream solder is printed on a required portion of the substrate 29 through the pattern holes 26.

Next, when cream solder is supplied onto the mask 25, the wing nut 31 shown in FIG. 3 is loosened, and the hook 30 is rotated and moved to the position 30 'with the pin 30b as a fulcrum. The hook 30 is removed from the right mask frame mounting member 15 by holding the hook 30 with the screw 30d.
Next, when the rod 28a of the air cylinder 28 is retracted, the mounting plate 27 rotates counterclockwise about the horizontal shaft 4, and the motor 7, the ball screw 8 connected to the motor 7, the bearing box 10, the right top plate. 9 rotates counterclockwise and the squeegee 12 rises via the ball screw nut 11 screwed to the ball screw 8, and then cream solder is supplied onto the mask 25.

Next, in the case of removing and cleaning cream solder or the like that oozes out on the back surface of the mask 25, the hook portion 30c of the hook 30 is tightened to the right mask frame mounting member 15 with the wing nut 31, and shown in FIG. Remove the fixing screw 16. Then, similarly to the above, the rod 28 of the air cylinder 28 is
When a is retracted, the right mask frame mounting member 15, the right joint member 20, the mask frame 21, and the mask 25 are hooked by the hook 3
0, the hook mounting plate 30a, the right side top plate 9, and the bearing box 10 to be integrated with the ball screw 8 and rotate counterclockwise about the horizontal shaft 4 to raise the mask 25, A space is formed between the back surface of the mask 25 and the printed board 29, and the back surface of the mask 25 is cleaned using this space. After this cleaning is completed, the rod 28a of the air cylinder 28 is extended and, conversely to the above, the ball screw 8 pivots clockwise about the horizontal shaft 4 to form a right mask frame integrated with the ball screw 8. The mounting member 15 is set on the right side base 3 by fitting the lateral long groove 14a to the guide pin 14, and is fixed to the right side base 3 by the fixing screw 16.

In this case, since the mask frame 21 is held by the horizontal shaft 4 and the guide pin 14 without any vertical displacement and by the horizontal shaft 4 and the guide pin 17 without horizontal displacement, the mask 25 is returned to its original position without displacement. Return.

As described above, the rod 2 of the air cylinder 28 is described.
By retracting 8a, the squeegee 12 can be raised and cream solder can be easily supplied. Further, the hook 30 is locked to the right mask frame mounting member 15, the fixing screw 16 is removed, and the rod 28a of the air cylinder 28 is fixed. Since the back surface of the mask 25 can be cleaned by retracting, these operations can be performed easily in a short time, and the operating rate of the printing apparatus can be improved.

[Effects of the Invention] As described in detail above, the present invention independently mounts the left mask frame mounting member and the motor base on the horizontal shaft provided on the left base, and mounts them on the motor base. A bearing box supported by the right platform is installed at the tip of the screw rod connected to the motor shaft, and this bearing box and the right mask frame mounting member that is detachably attached to the right platform can be disengaged. When the rod of the air cylinder is retracted while the bearing box and the right-side mask frame mounting member are unlocked, the motor base, motor, screw rod, bearing box, and squeegee will move to the horizontal axis. The squeegee rises and separates from the mask, so that cream solder can be easily and quickly supplied onto the mask, and the air cylinder with the bearing box and the right mask frame mounting member locked. Retreat the rod of Then, the motor base, the motor, the screw rod, the bearing box, the squeegee, the right mask frame mounting member, the mask frame, the mask, and the left mask frame mounting member integrally rotate about the horizontal axis as a fulcrum, and the back surface of the mask As it rises, an open space can be formed on the back surface of the mask, cleaning of the back surface of the mask can be performed easily and reliably, and each of the above operations can be performed easily and in a short time, greatly improving the operating rate of the printing device. You can do it, and you can work very efficiently.

[Brief description of drawings]

FIG. 1 is a front view showing the whole embodiment of the present invention, and FIG.
The figure shows the left side view, FIG. 3 shows the front view of the hook, and FIG.
FIG. 5 is a plan view showing a mask frame attached state, and FIG. 5 is a plan view showing a conventional mask frame attached state. 1 ... Device floor, 2 ... Left bed, 3 ... Right bed, 4 ...
… Horizontal axis, 6 …… Left side mask frame mounting member, 7 …… Motor, 8 …… Ball screw (screw rod), 10 …… Bearing box, 1
1 ... Ball screw nut (nut), 12 ... Squeegee, 15 ... Right side mask frame mounting member, 21 ... Mask frame, 25 ... Mask, 28 ... Air cylinder, 30 ...
… Hooks (locking members).

Claims (1)

[Scope of utility model registration request] 1. A pair of left and right pedestals that are erected on the floor of the apparatus, a left mask frame mounting member and a motor pedestal that are independently rotatably supported by horizontal shafts provided on the left pedestal, respectively. A motor attached to the motor base and a screw rod connected to the shaft of the motor base, a bearing box provided at the tip of the screw rod and supported by the right side base plate, and detachably attached to the right side base plate. And a right side mask frame mounting member, a squeegee mounted downward on a nut screwed to the screw rod, and a mask frame mounted on the left and right mask frame mounting members and having a mask attached to the squeegee. And an air cylinder attached to the apparatus floor for rotating the motor base around the horizontal axis, and a locking member for releasably locking the bearing box and the right mask frame mounting member. Between the bearing box and the right mask frame mounting member When the rod of the air cylinder is retracted with the stop released, the motor base, motor, screw rod, bearing box, and squeegee rotate about the horizontal axis as a fulcrum, and this squeegee rises and separates from the mask, and the bearing box When the rod of the air cylinder is retracted with the right and left mask frame mounting members locked, the motor base, motor, screw rod, bearing box, squeegee, right mask frame mounting member, mask frame, mask, left mask frame mounting member The printing apparatus is characterized in that the back surface of the mask is raised by integrally rotating with the horizontal axis as a fulcrum.