JPH01229630A - Screen frame fixing device in screen printing machine - Google Patents

Abstract

PURPOSE:To enable a screen frame to be fixed correctly and surely without paying attention, by holding the screen frame between rods of cylinder devices and stoppers after the positional regulation action of the cylinder devices. CONSTITUTION:A substrate 8 on a pair of chains 7, 7 is carried from a carry-in position to a discharge position through a previous printing position. A screen receive part 12 is fixed on the upper surface of a plurality of struts 11 raised on the upper surface of a device body 2. A screen frame 18 is disposed on a reference plane 13 (an upper surface) of the screen receive part 12. On the other hand, pressing means 21 consisting of stoppers 19a-19c disposed orthogonally and cylinder devices 20a-20c are provided by three sets so as to press the screen frame 18 orthogonally. Rods 25 of the three cylinder devices 20a-20c travel in the order of a non-pressing position, a pressing position, and the non-pressing position for conducting a positional regulation. Then, the screen frame 18 is subjected to a sufficient pressing force to be abutted against the stoppers 19a, 19b, and 19c, thereby being positioned accurately and surely.

Description

[Detailed description of the invention] The present invention will be explained in the following order.

A. Industrial field of application B1 Overview of the invention C1 Prior art 0 Problems to be solved by the invention 90 Means for solving the problems F1 Effect G. Examples G1. Substrate transport means (FIGS. 1 and 2) G7. Screen frame fixing device (Figs. 1 to 6) Gs, solder supply means (Fig. 1) G4. Substrate positioning means (Figs. 3 and 4) G5. Substrate lifting means (Figs. 3 and 4) Go, substrate suction means (3rd
Figure, Figure 4) G? , substrate temporary support mechanism (Fig. 3, Fig. 4)
081 Effect H8 Effect of the Invention A, Industrial Application Field The present invention relates to a screen frame fixing device for a screen printing press that fixes a screen frame to a screen receiver.

B1 Summary of the Invention The present invention provides a screen frame fixing device for a screen printing press that fixes a screen frame to a screen receiving part, in which pressing means consisting of a stopper and a cylinder device are moved in orthogonal directions on the upper surface of the screen receiving part. By arranging at least one set of each cylinder device and sandwiching the screen frame between the rods of the cylinder devices and the stopper after a position regulating operation in which the rods of each cylinder device are alternately operated, the screen frame can be accurately and without requiring attention. The screen frame can be securely fixed.

C1 Prior Art A conventional screen printing machine is shown in FIGS. 7 and 8. In FIGS. 7 and 8, a pair of belts 10
0 are provided in parallel, and a substrate 101 is placed on this belt 100. The mounted substrate 101 is moved in the C direction and transported from the carry-in position to the pre-printing position to the carry-out position. The screen receiving portion 102 is fixed to a device main body (not shown), and its upper surface constitutes a reference surface 103. A hole 104 is formed in the screen receiving portion 102, and a screen frame fixing device 105 is provided around the hole 104. This screen frame fixing device 105 is
Assuming that the directions shown in FIGS. 7 and 8 are the X direction, the y direction, and the two directions, the adjustment screw 10 that regulates the X direction and the y direction
6 and a toggle clamp 107, and also has a toggle clamp 108 that regulates two directions (up and down directions), and the screen frame mounting member 109 is held between the adjustment screw 106 and the toggle clamp 107 to position it in the X direction and the y direction. At the same time, the screen frame mounting member 109 is pressed against the reference surface 103 by the toggle clamp 108 to perform positioning in two directions. A screen frame 110 is fastened to the lower surface of the screen frame mounting member 109 with screws 111, and the screen frame 110 is disposed within the hole 104. A screen 112 is stretched over this screen frame 11O, and holes (not shown) for printing solder, adhesive, etc. are formed in this screen 112.

Further, a board holder 113 is provided below this screen 112, and a reference bin +14 is placed on the upper surface of this board holder 113.
has been erected. Further, the substrate holder 113 can support the substrate 101 on its upper surface by suction, and can be moved in the vertical direction (direction D) by a substrate lifting means (not shown).

When the substrate 101 is moved to the pre-printing position by the belt 100, the movement of the belt 100 is stopped. Next, the board holder 113 moves upward and the board 101 is placed on its upper surface with the board 101 positioned by the reference pins 114.
The substrate 101 is supported on the upper surface of the substrate holder 113 by suction. The substrate holder 113 moves further upward and is stopped when the substrate 8 is located at the printing position, which is the lower surface of the screen 112. Then, solder, adhesive, etc. are applied to the upper surface of the screen 112, and the solder, adhesive, etc. fall through the holes and adhere to the substrate 101. When the attachment to the substrate 101 is completed, the substrate holder 113 moves downward and the suction is stopped at a position where the substrate 101 is placed on the belt 100. Even after this suction is stopped, the substrate holder 113 moves downward and stops slightly below the substrate 101. The substrate 101 placed on the belt 10.0 is moved to the unloading position by the movement of the belt 100. The above operation is repeated and solder, adhesive, etc. are printed on the board lots one after another.
(See Publication No. 48560).

In the above configuration, to replace the screen 112,
First, the toggle clamps 107 and 108 are operated to set the toggle clamps 107 and 108 to the non-pressing position, and the screen frame 110 is removed together with the screen frame attachment member 109. Next, the screen frame attachment member 109 with the new screen 112 attached is placed on the reference surface 103 of the screen receiver 102, and then the screen frame attachment member 109 is
9 so that it contacts the tip of the adjusting screw 106. Finally, toggle clamp 107. The toggle clamps 107 and 108 may be placed in the pressed position by operating t08.

D1 Problems to be Solved by the Invention However, if the positioning of the screen frame mounting member 109 in contact with the tip of the adjustment screw 106 is inaccurate, the screen frame 120 may be fixed in an inclined state. If the screen frame 110 is fixed in an inclined state, printing will not be performed at an accurate position. Therefore, the person who replaces the screen 112 needs to be careful about the above-mentioned alignment, and a technique that can fix the screen frame 110 without requiring attention is desired.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a screen frame fixing device for a screen printing machine that can accurately and reliably fix a screen frame without requiring much attention.

91 Means for Solving the Problems To achieve the above objects, the screen frame fixing device for a screen printing press of the present invention comprises a screen frame on which a screen is stretched, and the screen frame is attached to the upper surface of the screen receiver. A pressing means consisting of a stopper and a cylinder device disposed opposite the stopper is provided in the screen receiving part, and at least one set of the pressing means is arranged in the orthogonal direction on the upper surface of the screen receiving part. Then, after performing a position regulating operation in which one rod is in the pressing position and the other rod is in the non-pressing position on each cylinder device, the rods of each cylinder device are set in the pressing position and the screen frame is moved. It is held between the rod of the cylinder device and the stopper.

To replace the F3 action screen, first, operate the cylinder device to set each rod in the non-pressing position and remove the attached screen frame. Next, the screen frame of the new screen is placed on the screen pedestal, and the screen frame is positioned near the stopper or in a position where it almost contacts the stopper. lastly,
When the cylinder device is driven, the screen frame is fixed after the cylinder device performs a position regulating operation. In the position regulating operation, for example, when one rod presses the screen frame in the X direction, the screen frame is not receiving any pressing force in the X direction, so the screen frame always comes into contact with the stopper that regulates the X direction, and the other rod When the rod presses the screen frame in the X direction, the screen frame comes into contact with the stopper that regulates the X direction for the same reason as described above, so that the screen frame is always aligned at an accurate position.

G. Example Embodiments of the present invention will be described below with reference to the drawings.

G3. Substrate Transfer Means In FIGS. 1 and 2, the substrate transfer means 1 includes a pair of chain support blocks 3 3 arranged in parallel above the main body 2 of the apparatus.
, 3 are provided with several rollers 4 and drive rollers 6 driven by a motor 5 to form a chain running path. Chains 7.7 are hung on each of the pair of chain running paths, and the board 8 is placed on the pair of chains 7.7 and moved in the direction to move the board 8 from the carry-in position to the pre-printing position. and transported from the pre-printing position to the unloading position. One of the pair of chain support blocks 3.3 is movable in the direction of the arrow, and the interval between the pair of chains 7.7 is varied according to the width dimension of the board 8.

G! , Screen Frame Fixing Device As shown in FIGS. 1 to 4, the screen frame fixing device 10 has four pillars 2 erected on the top surface of the main body 2, and a screen receiving part 12 on the top surface of the pillars 11. Fixed. This screen receiving part 12 is located above the chain 7, and the upper surface of the screen receiving part 12 is on the reference plane 1.
3. Further, a hole 14 is formed approximately in the center of this screen receiving portion 12, and a hole 14 is formed in the lower part of this hole 14.
A substrate frame support protrusion 15 that protrudes inward is provided. Inside the hole 14, a substrate frame 16 is supported around its lower surface by the substrate frame support protrusion 15, and a substrate insertion hole 17 is formed in the substrate frame 16. A screen frame 18 is arranged on the reference surface 13 (upper surface) of the screen receiver 12, and a stopper l 9 a = is provided at a location on the screen receiver 12 located on the outer periphery of the screen frame 18.
Three sets of pressing means 21 are provided, each consisting of a cylinder 19c and cylinder devices 20a to 20c. As shown in FIGS. 2 and 5, the X direction and the
When the direction is determined, - pair of pressing means 21h<X direction, two sets of pressing means 21 are arranged in the X direction and are provided to press the screen frame 18 in the X direction and in the X direction. The stopper 19a = l9c is connected to a support member 22 fixed to the screen receiving portion 12 and this support member 2.
2 and an adjusting screw 23 screwed into the screw 2, and by changing the screwing position of the adjusting screw 23, the position of the tip of the adjusting screw 23 can be changed. In the cylinder devices 20a to 20c, a cylinder 24 is fixed to the screen receiving portion 12, and a rod 25 is moved between a short stroke position, a non-pressing position, and a long stroke position, depending on the hydraulic pressure inside the cylinder 24. As shown in FIG. 5, oil flows into and out of the cylinder 24 through switching valves 26a to 26c connected to a pump (not shown).
The sequencer 27 performs switching control of 6c. When the mounting button 28 is pressed, this sequencer 27 moves the rods 25 of the three cylinder devices 20a to 20c to the short stroke position (non-pressing position) - long stroke position (pressing position) - short stroke position as a first step. Avoiding position regulation movements that require a series of movements to be performed in sequence (to the non-pressing position),
Next, as a second step, three cylinder devices 20a to 20c are
The rod 25 is caused to sequentially move from a short stroke position to a long stroke position. Also, release button 29
When is pressed down, the rods 25 of the three cylinder devices 20a to 20c are controlled to move simultaneously from the long stroke position to the short stroke position.

The screen frame 18 is formed into a rectangular shape from two X-direction frame members 18a and two X-direction frame members 18b arranged in parallel, and a screen 30 is stretched over the screen frame I8. This screen 30 has holes 30a formed at locations corresponding to solder attachment points on the substrate 8. This screen frame 18 is arranged on the upper surface of the screen receiving part 12 so that the screen 30 is in contact with the reference surface 13. Fittings 31 are attached to three opposing positions of the two X-direction frame members 18a and one opposing position of the two X-direction frame members 18b, respectively. As shown in detail in FIG. 6, this stopper fitting 31 has a tip formed with a tapered surface 32 that is gentle in the vertical direction, and the tip of the adjustment screw 23 of the stopper 19a = 19c is attached to this tapered surface 32. Also, the tips of the rods 25 of the cylinder devices 20a to 20c are pressed.

Gs, Solder Supply Means As shown in FIG. 1, the solder supply means 34 has a lid portion 36 supported by a rotating shaft 35 on the screen receiving portion 12. As shown in FIG. The tip of a rod 38 of a cylinder device 37 is connected to the front portion of this lid portion 36, and the expansion and contraction of the rod 38 of this cylinder device 37 moves the lid portion 36 to the open position shown in FIG. Each of the twelve abutting members 39,40 rotates between the abutting closed position and the abutting closed position.

The lid portion 36 is provided with a solder supply block 41 for supplying cream solder onto the screen 30, a squeegee 42 for sweeping cream solder on the screen 30, a motor 43 for moving the squeegee 42, and the like.

G4. Substrate positioning means As shown in FIGS. 3 and 4, the substrate positioning means 45
A support arm 47 is slidably provided on the substrate positioning section 46. A reference pin lifting cylinder device 48 is fixed to this support arm 47, and a reference pin support member 50 is attached to the tip of a rod 49 of this reference pin lifting cylinder device 48. This reference pin support member 5
A guide rod 51 is suspended below the support arm 47, and this guide rod 51 is inserted into the guide hole 5 formed in the support arm 47.
It is inserted into 2. Further, a reference pin 53 is provided upright on the upper surface of the reference pin support member 50.

The tip of this reference pin 53 is located at a position below the substrate 8 at the pre-printing position at the short stroke position of the rod 49, and at a position above the substrate 8 at the pre-printing position at the long stroke position of the rod 49. be located. In this embodiment, a reference pin 53 is inserted into a reference hole (not shown) formed in the substrate 8 to position the substrate 8.

Ga, Substrate Elevating Means As shown in FIGS. 3 and 4, the substrate elevating means 55 is
A substrate lifting cylinder device 56 is fixed to the apparatus main body 2, and a lifting block 58 is fixed to the tip of a rod 57 of the substrate lifting cylinder device 56. This lifting block 5
8, there is a guide rod 59 and a rising point adjustment rod 60.
These rods 59 and 60 are connected to the device body 2.
is inserted into the guide hole 6I. An adjusting nut 62 is attached to the lower part of the rising point adjusting rod 60, and by varying the mounting position of this adjusting nut 62, the rising point can be finely adjusted. Further, a board holder 63 is attached to the upper surface of the lifting block 58, and this board holder 63
is located below the substrate 8 at the pre-printing position. Although not shown, the board holder 63 and the lifting block 58 have a positioning pin protruding from one side and a positioning groove into which the positioning pin is inserted, and the board holder 63 is positioned in the lifting block 58. has been done. Also, the board holder 6
3 can be removed from the lifting block 58 by lifting it upward.

A predetermined groove 64 is formed on the upper surface of this board holder 63, and the electronic components already mounted on the back surface of the board 8 can escape into this groove 64. Therefore,
The lower surface of the board 8 is placed in contact with the board holder 64 except for the mounting portion of the electronic component.

Ga, substrate suction means As shown in FIGS. 3 and 4, the substrate suction means 66 is
It has a plurality of suction holes 67 that open on the top surface of the board holder 63, and the plurality of suction holes 67 gather together inside the board holder 63, and the other end opens at the bottom surface of the board holder 63. . The suction hole 67 opened on the lower surface communicates with a hole 68 of the lifting block 58, and this hole 68 is connected to one end of the vibro 9. The other end of this vibro 9 is connected to a suction pump (not shown). When the suction pump is driven, a plurality of suction holes 67 open on the upper surface of the substrate holder 63 are opened.
Air is sucked out.

G7. Board Temporary Support Mechanisms In FIGS. 3 and 4, a total of four board temporary support mechanisms 71 are provided at two opposing positions of the pair of chain support blocks 3.3. This board temporary support mechanism 71 is located outside the chain support block 3 and
The rail 7 runs along the length of the chain support block 3.
2.73 is provided, and a slider 74 is attached so as to be slidable along this rail 72.73. A link member 75 is provided on the slider 74 so as to be rotatable around a rotating shaft 76 . The base end of an arm portion 77 is fixed to the upper end of this link member 75.
7 is a pressing position for pressing the upper surface of the substrate 8 at the pre-printing position, as shown in FIG. It is configured to move between a permissible release position and a release position. A rod receiving portion 75a is protruded from the lower end of the link member 75,
A spring 78 serving as a biasing means is interposed between the rod receiving portion 75a and the slider 74. Due to the spring force of this spring 78, the arm portion 7
7 is biased to the pressed position.

Further, a rod 80 of a cylinder device 79, which is a driving means, is in contact with the upper surface of the rod receiving portion 75a. This cylinder device 79 is fixed to the slider 74, and by moving the rod 80 from the short stroke position to the long stroke position, the link member 75 rotates against the spring force, and the arm portion 77 is released from the pressed position. Move to position. This arm portion 77 is normally located at the release position.

080 action The operation of the above configuration will be explained below.

For example, when the substrate 8 is supplied from a substrate supply means (not shown) to the carry-in position of the screen printing machine, the substrate 8 is moved on the chain 7 by the substrate conveyance means 1 and conveyed to the pre-printing position.

Then, first, the cylinder device 79 of the substrate temporary support mechanism 71
is driven, and the rod 80 is displaced from the long stroke position to the short stroke position. Then, the arm portion 77 moves to the pressing position by the spring force of the spring 78 and presses the four corners of the upper surface of the substrate 8.

Next, the cylinder device 48 for raising and lowering the reference bin of the substrate positioning means 45 is driven to raise the reference pin 53, and as shown in FIG. Ru.

Next, the substrate lifting cylinder device 56 of the substrate lifting means 55
is driven and the substrate holder 63 is raised. This board holder 63
When the board 8 rises, the bottom surface of the board 8 first comes into contact with the top surface of the board holder 63, and when it rises further beyond this contact position, the board 8
rises together with the substrate holder 63 against the pressing force of the arm portion 77 . During the above operation, at a position where the substrate 8 comes into contact with the upper surface of the substrate holder 63, a suction pump (not shown) of the substrate suction means 66 is driven, and the substrate 8 is sucked while being positioned by the reference pins 53. It is supported on the upper surface of the pedestal 63. or,
At a position slightly higher than the position where the board 8 contacts the top surface of the board holder 63, the cylinder device 79 of the board temporary support mechanism 71 is driven, the rod 80 moves to the long stroke position, and the arm portion 7°7 is released. moved to position. Arm part 77
When the board 8 is moved to the release position, the board 8 rises together with the rise of the board holder 63 without being subjected to the pressing force of the arm part 77. Then, the board 8 is inserted into the board insertion hole 17 of the board frame 16, and as shown in FIG.
When the printing position coincides with the upper surface of the substrate, the cylinder device 56 for lifting and lowering the substrate is stopped.

Then, the cream solder supplied from the solder supply block 41 to the upper surface of the screen 30 is swept with a squeegee 42, and during this sweeping process, the cream solder falls onto the board 8 from the hole 30a of the screen 30, and the cream solder is applied to a predetermined location on the board 8. Solder is applied.

When the cream solder has been attached, the substrate lifting/lowering cylinder device 56 of the substrate lifting means 55 is driven, and the substrate 8 is lowered together with the substrate pedestal 63. Then, when the lower surface of the substrate 8 is placed on the chain 7, the suction pump of the substrate suction means 66 stops. Further, even when the board 8 is placed on the chain 7, the board lifting cylinder device 56 is still driven, and stops at the position where the board holder 63 has descended slightly below the board 8, as shown in FIG. The substrate 8 placed on the chain 7 is moved from the pre-printing position to the carry-out position by the substrate transport means 1. Thus, the above process is repeated and screen printing is performed on new substrates 8 one after another.

Here, in order to replace the screen 30 with a new one, first,
By driving the cylinder device 37 of the solder supply device 34, the first
As shown in the figure, the lid vJ36 is moved from the closed position to the open position. Next, when the release button 29 of the screen frame fixing device 10 is pressed, all the rods 25 of the three cylinder devices 20a to 20c move from the long stroke position to the short stroke position.

Then, remove the screen frame 18, remove the board frame 16 and the board holder 63, and create a new screen 30.
Attach the board holder 63 and board frame [6] suitable for

This substrate frame 16 is selected so that the upper surface of the substrate 8 coincides with the upper surface of the substrate frame 16 when the substrate 8 is placed at the printing position on the new substrate holder 63.

Next, the screen frame 18 of the new screen 30 is placed on the reference surface 13 (upper surface) of the screen receiver 12. After this placement, the X-direction frame member 18a and the Y-direction frame member 18b of the screen frame 18 are preferably pressed against the tips of the respective stoppers 19a=19c.

Next, install button 2 of the screen frame fixing device IO.
When you press 8, the three cylinder devices 2 will be activated as the first step.
The rods 25 0a to 20c sequentially move from a short stroke position (non-pressing position) to a long stroke position (pressing position) to a short stroke position. During the stroke of the rod 25 of the cylinder device 20a in the X direction, the screen frame 18 is not subjected to a pressing force in the X direction, and conversely, when the cylinder devices 20b and 20c are in the Since there is no screen frame 18, the screen frame 18 can be freely moved in each direction by the pressing force in the X direction and the X direction. Therefore, the stopper 19a that regulates the X direction with a pressing force in the X direction, and the stopper 19a that regulates the X direction with a pressing force in the X direction.
b and 19c, respectively, and the screen frame 18 is accurately and reliably aligned. Furthermore, since two sets of cylinder devices 20b and 20C and stoppers 19b and 19c are provided in the X direction, it is ensured that the screen frame 18 is rotated and displaced by the pressing force of the rod 25 of each cylinder device 20a to 20c. Prevented. In a second step, with the screen frame 18 in contact with the tip of each stopper 19a = l9c, the rods 25 of the three cylinder devices 20a to 20c are sequentially moved from the short stroke position (non-pressing position) to the long stroke position. Move to (press position).

With this movement, the tip of the rod 25 and the tip of the stopper 19a=19c are pressed against the six stoppers 31 of the screen frame I8, and the screen frame 18 is fixed.

Further, since the tip of the fitting 3I of the screen frame 18 is formed into a predetermined tapered surface 32, the pressing force acts in the X direction or in the X direction and also acts downward. This downward pressing force causes the screen frame 18 to move into the screen receiving portion 12.
The reference plane +3j is firmly fixed in close contact with the reference plane +3j.

Finally, the cylinder device 37 of the solder supply means 34 may be driven to bring the M portion 36 into the closed position.

H. Effects of the Invention As described above, according to the present invention, in a screen frame fixing device for a screen printing machine that fixes a screen frame to a screen receiving part, the pressing means consisting of a stopper and a cylinder device is fixed to the screen receiving part. At least one set of each is arranged in the orthogonal direction on the top surface, and after the position regulating operation in which the rods of each cylinder device are operated alternately, the screen frame is clamped between the rod of the cylinder device and the stopper, so be careful. The effect is that the screen frame can be fixed accurately and reliably without requiring any force.

[Brief explanation of the drawing]

1 to 6 show embodiments of the present invention, in which FIG. 1 is a perspective view of a screen printing machine, FIG. 2 is an exploded perspective view with a part of the screen printing machine cut away, and FIGS. 4 is a longitudinal sectional view of the screen printing machine, FIG. 5 is a conceptual diagram of the screen frame fixing device, FIG. 6 is a partial sectional view of the screen frame fixing device, and FIGS. 7 and 8 are conventional examples. shows,
FIG. 7 is a plan view of the screen printing machine, and FIG. 8 is a sectional view of the screen printing machine. 10.105...Screen frame fixing device, 12°10
2... Screen receiving part, 18, 110... Screen frame, 19a=19c... Stopper, 20a-20
c... Cylinder device, 21... Pressing means, 30°1
12...Screen. Screen, 1 bar, Japanese cut, figure 6, green J?苧li+insh phantom map α (gray) Fig. 8 27 Lean J"T's'!; fAnfflfffi (i
t) Figure 7

Claims (1)

[Claims] (1) Construct a screen frame on which the screen is stretched,
Place this screen frame on the top of the screen receiver,
The screen receiving portion is provided with pressing means consisting of a stopper and a cylinder device disposed opposite the stopper, and at least one set of the pressing means is arranged in the orthogonal direction on the upper surface of the screen receiving portion, and After each cylinder device is sequentially subjected to a position regulating operation in which one rod is in the pressing position and the other rod is in the non-pressing position, the rods of each cylinder device are set in the pressing position, and the screen frame is moved to the one end of the cylinder device. A screen frame fixing device for a screen printing machine, characterized in that the screen frame is clamped by a rod and the stopper.