CN115052750A

CN115052750A - Screen printing apparatus and screen printing method

Info

Publication number: CN115052750A
Application number: CN201980102806.2A
Authority: CN
Inventors: 田上义明
Original assignee: Micro Tec Co Ltd
Current assignee: Micro Tec Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2022-09-13
Also published as: JP7193186B2; TWI770468B; WO2021131011A1; WO2021131011A8; JPWO2021131011A1; TW202124173A

Abstract

A screen printing device (100) is provided with: a frame (52); a pressure rod (72) for mounting a working tool; a cylinder (81) having a piston rod (82) and fixed to the frame (52); and a lever mechanism (90) that transmits the movement of the piston rod (82) to the pressurizing rod (72). The lever mechanism (90) is arranged on one side (upper side) of the frame (52); the working tool and the cylinder (81) are disposed on the other side (lower side) of the frame (52). The lever mechanism (90) has a reverse action of the upward force and the downward force and a position changing action of the upward force and the downward force.

Description

Screen printing apparatus and screen printing method

Technical Field

The present invention relates to a screen printing apparatus and a screen printing method.

Background

Conventionally, there is a screen printing apparatus that performs printing at high pressure.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2000-263751.

Disclosure of Invention

Problems to be solved by the invention

A screen printing apparatus that performs printing at high pressure has a possibility that a frame or a frame of the screen printing apparatus is deformed.

In an embodiment of the present invention, it is intended to provide a screen printing apparatus suitable for high-pressure printing.

Means for solving the problems

The screen printing apparatus of the present invention is characterized by comprising: a frame; a pressurizing rod for mounting the operation tool; a cylinder having a piston rod and fixed to the frame; and a lever mechanism for transmitting the movement of the piston rod to the pressurizing rod.

Effects of the invention

According to the present invention, since the lever mechanism is provided, the force point and the action point can be arranged at different positions of the frame, and the deformation of the frame can be reduced.

Drawings

Fig. 1 is a front view of a screen printing apparatus 100 according to embodiment 1.

Fig. 2 is a front view of the screen printing apparatus 100 of embodiment 1.

Fig. 3 is a front view of the screen printing apparatus 100 according to embodiment 1.

Fig. 4 is a plan view of the screen printing apparatus 100 according to embodiment 1.

Fig. 5 is an AA sectional view of the screen printing apparatus 100 shown in fig. 2.

Fig. 6 is a BB cross-sectional view of the screen printing apparatus 100 shown in fig. 2.

Fig. 7 is a configuration diagram of a lever mechanism 90 according to embodiment 1.

Fig. 8 is a front view of the screen printing apparatus 100 according to embodiment 2.

Fig. 9 is a rear view of the screen printing apparatus 100 of embodiment 2.

Fig. 10 is a plan view of the screen printing apparatus 100 according to embodiment 2.

Fig. 11 is a CC sectional view of the screen printing apparatus 100 shown in fig. 8.

Fig. 12 is a front view of a screen printing apparatus 100 according to embodiment 3.

Fig. 13 is a front view of a screen printing apparatus 100 according to embodiment 3.

Fig. 14 is a front view of a screen printing apparatus 100 according to embodiment 4.

Fig. 15 is a front view of a screen printing apparatus 100 according to embodiment 5.

Fig. 16 is a front view of a screen printing apparatus 100 according to embodiment 6.

Fig. 17 is a front view of a screen printing apparatus 100 according to embodiment 7.

Fig. 18 is a front view of a screen printing apparatus 100 according to embodiment 8.

Fig. 19 is a front view of a screen printing apparatus 100 according to embodiment 9.

Fig. 20 is a CC sectional view of the screen printing apparatus 100 of fig. 19.

Fig. 21 is a front view of a screen printing apparatus 100 according to embodiment 10.

Fig. 22 is a plan view of the screen printing apparatus 100 according to embodiment 10.

Fig. 23 is a DD end view of the screen printing apparatus 100 of fig. 21.

Fig. 24 is a front view of the screen printing apparatus 100 of embodiment 10.

Fig. 25 is a rear view of the screen printing apparatus 100 of embodiment 10.

Fig. 26 is a front view of the screen printing apparatus 100 of embodiment 10.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In the drawings, the same or corresponding portions are denoted by the same reference numerals.

In the description of the embodiments, the description about the same or equivalent parts will be omitted or simplified as appropriate.

In the drawings described below, the left-right direction (X direction, horizontal direction), the up-down direction (Z direction, vertical direction), and the front-back direction (Y direction, horizontal direction) orthogonal to the drawing plane are orthogonal to each other.

The terms of the left-right direction, the up-down direction, and the front-back direction described below are used for convenience of description, and the directions are changed by disassembling the arrangement of the screen printing apparatus 100.

Embodiment 1.

Fig. 1, 2, and 3 are front views of a screen printing apparatus 100 according to embodiment 1.

Fig. 5 is an AA sectional view of the screen printing apparatus 100 shown in fig. 2 of embodiment 1.

Fig. 6 is a BB cross-sectional view of the screen printing apparatus 100 shown in fig. 2 of embodiment 1.

● Screen printing apparatus 100

The screen printing apparatus 100 includes a base 50, a printing unit 60, a control unit 110, and a drive mechanism 120.

The screen printing apparatus 100 has a frame (frame) 52.

The screen printing apparatus 100 includes a pressing bar (pressing rod) 72 to which a printing tool or a working tool is attached.

The screen printing apparatus 100 has a cylinder (cylinder) 81, and the cylinder 81 has a piston rod 82 and is fixed to the frame 52.

The screen printing apparatus 100 has a lever mechanism 90 that transmits the movement of the piston rod 82 to the pressing rod 72.

The lever mechanism 90 is disposed on one side (upper side) of the frame 52.

The printing tool or the working tool and the cylinder 81 are disposed on the other side (lower side) of the frame 52.

● control unit 110

The screen printing apparatus 100 has a control section 110.

The control unit 110 controls the entire apparatus.

The control unit 110 may be realized by a central processing unit, a program, and a memory.

The signal from the control unit 110 is transmitted to each unit through the signal line 111.

The following operations can be realized by the control unit 110 transmitting a command through the signal line 111.

● base station 50

The base 50 has an integrally molded structure made of a cast material.

The base 50 is integrally formed, thereby eliminating assembly errors and deformation due to aging.

The base 50 has a U-shape or a square shape when viewed from the top.

The base 50 has a pair of slide mechanisms 51 and a frame 52.

The pair of slide mechanisms 51 are disposed on the opposing inner walls of the U-shaped or square-shaped base 50.

The slide mechanism 51 moves the frame 52 in the front-rear direction by the drive mechanism 120.

The slide mechanism 51 has rails 57 for sliding the left and right ends of the frame 52.

● printing section 60

The printing unit 60 includes a frame 52, a printing tool or a working tool fixed to a pressure bar 72, a cylinder 81, and a lever mechanism 90.

The frame 52 is a mount table on which the pressing rod 72, the cylinder 81, and the lever mechanism 90 are mounted.

The cylinder 81 is a power generator that generates a force.

The printing tool or working tool fixed to the pressing bar 72 is a receiver (receiver) that receives force.

The lever mechanism 90 is a transmitter that transmits the force generated by the cylinder 81 to the pressing rod 72.

The printing section 60 includes a mount table, a power generator fixed to the mount table and generating a force, a lever mechanism attached to the mount table and transmitting the force generated by the power generator, and a receiver receiving the force from the lever mechanism.

As shown in fig. 1, the lever mechanism 90 is disposed at the highest position in the printing portion 60.

● frame 52

The frame 52 is a rectangular metal plate long in the left-right direction.

The frame 52 has an integrally formed construction made of cast material.

By integrally forming the frame 52, assembly errors or deformation due to aging are eliminated.

The left and right ends of the frame 52 are attached to the rails 57 of the slide mechanism 51.

The frame 52 mounts the printing portion 60.

The pressurizing rod 72 and the piston rod 82 are arranged in parallel.

The frame 52 has a through hole 55 through which the pressure rod 72 passes.

The frame 52 has a through hole 56 through which the piston rod 82 passes.

The frame 52 has a guide bush 53 and a through hole 54.

The guide bush 53 has a through hole, and the through hole of the guide bush 53 and the through hole 54 of the frame 52 are at the same position and have the same diameter.

The printing portion 60 has a holder (holder) 61 and 1 pair of guide bars 62.

The holder 61 fixes a scraper (squeegee) 68 at the lower portion. The squeegee 68 is an example of a printing tool or a working tool.

The pair of 1 guide rods 62 are fixed to the left and right of the upper surface of the holder 61, and pass through the through-holes of the guide bush 53 and the through-hole 54 of the frame 52.

The outer diameter of the guide rod 62 is the same as the inner diameter of the through hole of the guide bush 53 and the through hole 54 of the frame 52.

At the lower end of the pair of 1 guide rods 62, a holder 61 is attached.

The pair of guide rods 62 passively move up and down according to the up and down movement of the holder 61.

The guide bush 53 guides the movement of the holder 61 only in the up-down direction (Z direction).

The guide bush 53 prohibits the holder 61 from being displaced in the front-rear-left-right direction (X direction, Y direction), and permits the holder 61 to move only in the vertical direction (Z direction).

The screen printing apparatus 100 includes a screen plate 63 and a printing table (table) 64.

The screen plate 63 has a screen formed with a printing pattern.

The printing table 64 is a table on which a workpiece 69 is placed.

● pressure bar 72

The printing section 60 has a pressing bar 72.

The pressing rod 72 is a cylindrical metal rod.

The pressing rod 72 is fixed at the center of the upper surface of the holder 61.

The pressing rod 72 penetrates the through hole 55 in the vertical direction (Z direction).

The outer diameter of the pressurizing rod 72 is smaller than the inner diameter of the through hole 55.

On the outer periphery of the pressing rod 72, a thread cutting groove is provided.

A knob 96 is rotatably attached to the pressure lever 72 along the thread cutting groove.

The pressing lever 72 can no longer be lowered by the contact of the lower surface of the knob 96 to the upper surface of the frame 52.

The vertical position of the knob 96 determines the maximum lower position of the pressure lever 72.

● Cylinder 81

The printing section 60 has a cylinder 81.

The cylinder 81 is fixed at its upper surface to the lower surface of the frame 52.

The cylinder 81 has a piston rod 82 on the upper surface side.

The piston rod 82 is a cylindrical metal rod.

The piston rod 82 penetrates the through hole 56 in the vertical direction (Z direction).

The piston rod 82 performs a reciprocating motion.

The outer diameter of the piston rod 82 is smaller than the inner diameter of the through hole 56.

The cylinder 81 is preferably an air cylinder, but may be an electric cylinder, an electromagnetic cylinder, or another cylinder.

The piston rod 82 is actively moved up and down by the air pressure supplied to the cylinder 81.

The control unit 110 can adjust the pressure in the vertical direction of the piston rod 82 by adjusting the air pressure to the cylinder 81.

● Lever mechanism 90

The printing section 60 has a lever mechanism 90.

The lever mechanism 90 includes a lever (lever) 91, a shaft holding portion 73, a shaft holding portion 93, and a shaft holding portion 83.

The shaft holding portion 73 has a bottom surface fixed to the top of the pressure rod 72.

The shaft holding portion 73 holds a cylindrical point of action shaft 75.

The shaft holding portion 93 has a bottom surface fixed to an upper surface of the frame 52.

The shaft holding portion 93 holds a cylindrical fulcrum shaft 95.

The shaft holding portion 83 is fixed at the top of the piston rod 82 at its bottom surface.

The shaft holding portion 83 holds a cylindrical force point shaft 85.

As shown in fig. 5, the shaft holding portion 73 has a recess at an upper portion.

The recess operating point shaft 75 rotatably holds the operating portion 99 of the lever 91.

The upper portions of the shaft holding portion 93 and the shaft holding portion 83 also have the same structure as the upper portion of the shaft holding portion 73.

● Lever 91

The lever 91 is a linear metal rod.

The lever 91 has a force point portion 97, a fulcrum portion 98, and an action portion 99.

The lever mechanism 90 has an operating portion 99 disposed at the center in the lateral direction of the frame 52.

The lever mechanism 90 has a force point portion 97 disposed at a right end portion of the frame 52.

The lever mechanism 90 has a fulcrum portion 98 disposed at the center between an action portion 99 and a force point portion 97.

The force point portion 97 is disposed on the right outer side of the acting portion 99 and the fulcrum portion 98 with respect to the left-right center of the frame 52.

The fulcrum portion 98 is disposed on the right outer side of the action portion 99 with respect to the left-right center of the frame 52.

The operating portion 99 is attached to the pressure lever 72 via the operating point shaft 75 held by the shaft holding portion 73.

The fulcrum portion 98 is attached to the frame 52 via the fulcrum shaft 95 held by the shaft holding portion 93.

The force point portion 97 is attached to the piston rod 82 via the force point shaft 85 held by the shaft holding portion 83.

The lever 91 can swing about the fulcrum shaft 95.

● principle of lever mechanism 90

Fig. 7 is a configuration diagram of the lever mechanism 90.

The fulcrum axis 95 is centered between the action point axis 75 and the force point axis 85.

Here, if provided

The center distance between the action point shaft 75 and the fulcrum shaft 95 = D1

The center distance between the force point shaft 85 and the fulcrum shaft 95 = D2

Force = P2 applied to force point portion 97

The force = P1 that can be obtained at the action portion 99,

it becomes D1 × P1= D2 × P2.

In fig. 7, D1= D2, and P1= P2.

● action of lever mechanism 90

The following two operations of the lever mechanism 90 will be explained with reference to fig. 7.

1. Reversal of upward and downward forces

2. The position of the upward force and the downward force is changed.

● precondition

The point of action shaft 75 is located at the left and right center of the frame 52.

The force point shaft 85 and the cylinder 81 are fixed to the right end of the frame 52.

The fulcrum axis 95 is between the point of action axis 75 and the point of force axis 85.

Since the pressing rod 72 penetrates the through hole 55 of the frame 52, the frame 52 is not deformed by the vertical movement of the pressing rod 72.

Since the piston rod 82 penetrates the through hole 56 of the frame 52, the frame 52 is not deformed by the vertical movement of the piston rod 82.

● reverse rotation and position change

An upward force P2 applied to the force point shaft 85 at the right end of the frame 52 acts as a downward force P1 (a position changing action of the force from the right end to the center) on the force point shaft 75 at the center of the frame 52 by the lever mechanism 90.

The upward force P2 applied to the force point shaft 85 becomes a downward force P1 of the action point shaft 75 (reverse action of the upward-downward force) by the lever mechanism 90.

During printing, the pressing lever 72 is constantly pressed downward by a downward force P1, but is constantly subjected to an upward force Q1 as a reaction force from below.

An upward force P2 exerted on the pressure lever 72 at the center of the frame 52 acts as a downward force P1 (a position change action of force from the center to the right end) on the piston rod 82 at the right end of the frame 52 by the lever mechanism 90.

The upward force P2 applied to the pressure lever 72 is a downward force Q2 of the force point shaft 85 (reverse action of the upward-downward force) by the lever mechanism 90.

The downward force Q2 acts to press the cylinder 81 fixed to the frame 52 downward, and the right end of the frame 52 receives the downward force Q2.

Since the upward force Q1 generated at the center of the frame 52 is received as the downward force Q2 at the right end of the frame 52 by the position changing action of the force of the lever mechanism 90, the frame 52 is less deflected than when the downward force Q2 is received at the center.

The upward force Q1 applied to the pressure lever 72 is converted into a downward force Q2 of the force point shaft 85 by the force reverse action of the lever mechanism 90, and the upward force P2 becomes larger and the downward force Q2 becomes larger, so that the frame 52 does not deflect upward.

That is, even if the upward force of the piston rod 82 is increased, the center of the frame 52 does not deflect, and the printing apparatus is suitable for high-pressure printing.

● comparative example

Assume a case where the lever mechanism 90 is not used, the cylinder 81 is fixed to the upper surface of the center of the frame 52, and the pressurizing rod 72 and the piston rod 82 are coaxially arranged.

The upward force generated by the pressure rod 72 during printing presses the cylinder 81 fixed to the frame 52 upward. Since the frame 52 receives an upward force in the center, there is a possibility that the center of the frame 52 is deflected upward.

That is, the downward force of the piston rod 82 becomes larger, and the center of the frame 52 is deflected upward, which is not suitable for high-pressure printing.

Further, in the case where the pressurizing rod 72 and the piston rod 82 are arranged coaxially, since the cylinder 81 is arranged above the pressurizing rod 72 at the center of the frame 52, the cylinder 81 protrudes upward.

In the printing unit 60 of the present embodiment, the cylinder 81 is disposed below the frame 52, so that the height of the printing unit 60 can be reduced.

● bearing

The three bearings of the lever 91 are explained with the aid of fig. 7.

The force point portion 97 has a bearing 84 rotatably attached to the force point shaft 85 held by the shaft holding portion 83.

The fulcrum portion 98 includes a bearing 94 rotatably attached to the fulcrum shaft 95 held by the shaft holding portion 93.

The operating portion 99 has a bearing 74 rotatably attached to the operating point shaft 75 held by the shaft holding portion 73.

The bearing 94 is a circular bearing having the same inner diameter as the outer diameter of the fulcrum shaft 95.

As shown in fig. 7, the bearing 74 is an oblong bearing.

The oval 79 has a shape in which 1 semicircular part 76 and semicircular part 78 having the same inner diameter as the outer diameter of the point of action shaft 75 are connected to each other by a straight part 77 having a length W corresponding to 1 semicircular part.

The bearing 84 is a circular bearing similar to the bearing 74.

With the lever 91 horizontal, the point of action axis 75 and the point of force axis 85 are near the center of the frame 52 within the oblong circle 79.

When the lever 91 is rotated, the point of action shaft 75 and the point of force shaft 85 move horizontally outward in the oblong circle 79 by the length W.

The shape of the bearing 84 and the bearing 74 may be an ellipse or a quadrangle, as long as the operating point shaft 75 and the force point shaft 85 can move by the length W in the horizontal direction. The force point portion 97 and the action portion 99 may have bearings that can slide the force point shaft 85 and the action point shaft 75 in the lateral direction.

● Screen printing method

A method of screen printing by the screen printing apparatus 100 using the squeegee 68 will be described.

At the time of power-ON (ON), the state shown in fig. 1 is assumed.

● print preparation step S10

The control unit 110 sets the workpiece 69 on the printing table 64 via the drive mechanism 120, and starts the pre-printing process.

As shown in the state from fig. 1 to fig. 2, and further in the state from fig. 2 to fig. 3, when printing is started, the control unit 110 controls the cylinder 81 to raise the piston rod 82.

When the piston rod 82 is raised, the lever 91 rotates about the fulcrum shaft 95 of the fulcrum portion 98, the force point portion 97 of the lever 91 is raised, and the acting portion 99 of the lever 91 is lowered.

While the force point portion 97 is ascending and the action portion 99 is descending, the action point shaft 75 and the force point shaft 85 move outward in the oblong circle 79.

If the acting portion 99 of the lever 91 is lowered, the pressing rod 72 is lowered.

If the pressing bar 72 is lowered, the holder 61 and the squeegee 68 are lowered, the squeegee 68 comes into contact with the screen plate 63, and the squeegee 68 can apply a printing pressure to the screen plate 63.

● printing Process S20

After the print preparation step S10 is completed, the control unit 110 starts printing.

The control unit 110 controls the drive mechanism 120 to slide the frame 52 in the printing direction via the slide mechanism 51, and prints on the workpiece 69 while applying a printing pressure.

The control unit 110 controls the cylinder 81 during printing to keep the state of fig. 2 and the printing pressure constant.

In this way, the screen printing apparatus 100 performs printing by transmitting the movement of the piston rod 82 of the cylinder 81 to the pressing rod 72 to which the printing tool or the working tool is attached via the lever mechanism 90.

● end of printing step S30

After the end of the printing step S20, the control unit 110 starts the post-printing process.

When printing is completed, the control unit 110 controls the cylinder 81 to lower the piston rod 82 as shown in the state from fig. 3 to fig. 2, and further in the state from fig. 2 to fig. 1.

If the piston rod 82 is lowered, the lever 91 rotates about the fulcrum shaft 95 of the fulcrum portion 98, the force point portion 97 of the lever 91 is lowered, and the acting portion 99 of the lever 91 is raised.

While the lowering of the force point portion 97 and the raising of the action portion 99 are in progress, the action point shaft 75 and the force point shaft 85 move toward the center of the frame 52 within the oblong circle 79.

If the acting portion 99 of the lever 91 is raised, the pressing rod 72 is raised.

If the pressing rod 72 is raised, the holder 61 and the blade 68 are raised.

Then, the control unit 110 controls the drive mechanism 120 to slide the frame 52 to the print start position via the slide mechanism 51, and performs the next print preparation.

Embodiment 2.

In embodiment 2, points different from those of the above-described embodiments will be described.

Fig. 9 is a rear view of the screen printing apparatus 100 of embodiment 2.

Fig. 11 is a CC sectional view of the screen printing apparatus 100 shown in fig. 8 of embodiment 2.

In embodiment 2, a case where the lever mechanism 190 is applied to the scraper (scraper) 65 will be described.

In embodiment 2, as shown in the plan view of fig. 10, the lever mechanism 90 and the lever mechanism 190 are disposed point-symmetrically with respect to the front, rear, left, and right centers of the frame 52.

● frame 52

The pressurizing rod 172 and the piston rod 182 are arranged in parallel.

The frame 52 has a through hole 155 through which the pressure rod 172 passes and a through hole 156 through which the piston rod 182 passes.

● printing section 60

The printing portion 60 has a holder 161 and a guide bar 162.

The holder 161 fixes the scraper 65 at the lower portion. The doctor blade 65 is an example of a printing tool or a working tool.

The guide rod 162 is fixed to the upper surface of the holder 161, and penetrates the through hole of the guide bush 153 and the through hole 154 of the frame 52.

The outer diameter of the guide rod 162 is the same as the inner diameter of the through hole of the guide bush 153 and the through hole 154 of the frame 52.

Guide bar 162 is identical to guide bar 62.

The guide bush 153 is the same as the guide bush 53.

● pressure bar 172

The printing section 60 has a pressurizing bar 172.

The pressure lever 172 is located at the center in the left-right direction of the frame 52.

The pressing lever 172 is the same as the pressing lever 72.

A knob 196 is rotatably attached to the pressure lever 172.

Knob 196 is identical to knob 96.

● Cylinder 181

The printing section 60 has a cylinder 181.

Cylinder 181 is identical to cylinder 81.

The cylinder 181 has a piston rod 182 that penetrates the frame 52 in the vertical direction (Z direction).

The piston rod 182 is identical to the piston rod 82.

● Lever mechanism 190

The printing section 60 has a lever mechanism 190.

The lever mechanism 190 is identical to the lever mechanism 90.

The lever mechanism 190 has a shaft holding portion 173, a shaft holding portion 193, and a shaft holding portion 183.

The shaft holding portion 173, the shaft holding portion 193, and the shaft holding portion 183 are the same as the shaft holding portion 73, the shaft holding portion 93, and the shaft holding portion 83.

● Lever 191

The lever mechanism 190 has a lever 191.

Lever 191 is identical to lever 91.

The lever 191 has a force point portion 197, a fulcrum portion 198, and an action portion 199.

The lever mechanism 90 has the working portion 199 disposed at the center in the left-right direction of the frame 52.

The lever mechanism 90 has a force point 197 disposed at the left end of the frame 52.

The lever mechanism 90 has the fulcrum portion 198 disposed at the center between the acting portion 199 and the force point portion 197.

The force point 197 and the fulcrum 198 are disposed outside the working portion 199 with respect to the center of the frame 52.

Force point 197, fulcrum 198, and action 199 are the same as force point 97, fulcrum 98, and action 99.

● principle of lever mechanism 190

The principle of the lever mechanism 190 is the same as that of the lever mechanism 90.

● bearing

The force point unit 197 includes a bearing 184 rotatably attached to the force point shaft 185 held by the shaft holding unit 183.

The fulcrum 198 has a bearing 194 rotatably attached to the fulcrum shaft 195 held by the shaft holding portion 193.

The acting portion 199 has a bearing 174 rotatably attached to the acting point shaft 175 held by the shaft holding portion 173.

The bearing 194 is a circular bearing having the same inner diameter as the outer diameter of the fulcrum shaft 195, as in the bearing 94.

The

bearings

174 and 184 are oval bearings, similar to the

bearings

74 and 84.

● Screen printing method

A method of applying ink to the screen printing apparatus 100 by using the doctor blade 65 will be described.

The lever mechanism 90 maintains the state of fig. 1 during the period in which ink is applied using the blade 65.

● coating preparation step S110

After the end of the printing end step S30, the control unit 110 starts the pre-coating process.

When ink application is started, the control unit 110 controls the cylinder 181 to raise the piston rod 182.

When the piston rod 182 is raised, the lever 191 rotates about the fulcrum shaft 195 of the fulcrum 198, the force point 197 of the lever 191 rises, and the acting portion 199 of the lever 191 descends.

While the force point 197 is ascending and the force point 199 is descending, the force point axis 175 and the force point axis 185 move outward in the oblong circle 79.

If the working portion 199 of the lever 191 descends, the pressurizing rod 172 descends.

If the pressing bar 172 descends, the holder 161 and the doctor blade 65 descend, and the doctor blade 65 comes into contact with the screen plate 63.

● coating step S120

After the coating preparation step S110 is completed, the control unit 110 starts coating.

The control unit 110 controls the driving mechanism 120 to slide the frame 52 in the direction opposite to the printing direction by the slide mechanism 51, and applies ink by the doctor blade 65.

The control unit 110 controls the cylinder 181 during coating to keep the pressure applied to the doctor blade 65 constant.

In this way, the screen printing apparatus 100 applies ink by transmitting the movement of the piston rod 182 of the cylinder 181 to the pressure rod 172 on which the printing tool or the working tool is mounted via the lever mechanism 190.

● coating end step S130

After the coating step S120 is completed, the control unit 110 starts the post-coating process.

When the coating is completed, the controller 110 controls the cylinder 181 to lower the piston rod 182.

When the piston rod 182 is lowered, the lever 191 rotates about the fulcrum shaft 195 of the fulcrum 198, the force point 197 of the lever 191 is lowered, and the working portion 199 of the lever 191 is raised.

While the lowering of the force point 197 and the raising of the action part 199 are proceeding, the action point shaft 75 and the force point shaft 185 move toward the center of the frame 52 in the oblong circle 79.

If the action portion 199 of the lever 191 is raised, the pressing rod 172 is raised.

If the pressing rod 172 is raised, the holder 161 and the scraper 65 are raised.

Then, the control unit 110 controls the drive mechanism 120 to execute the print preparation step S10 and start printing.

Embodiment 3.

In embodiment 3, points different from those of the above-described embodiments will be described.

The screen printing apparatus 100 includes a lever 91 having a plurality of bearings 94.

The frame 52 has a plurality of fixing portions for fixing the shaft holding portion 93 corresponding to the plurality of bearings 94.

In fig. 12 and 13, the lever 91 has three bearings 94, and the frame 52 has three fixing portions K1, K2, K3 corresponding to the bearings 94.

The central bearing 94 is identical to the bearing 94 of fig. 1 and is centered between the point of action axis 75 and the point of force axis 85.

In fig. 12, a bearing 94 at the right end and a fixing portion K1 at the right end are used.

In fig. 13, a left end bearing 94 and a left end fixing portion K3 are used.

Here, as shown in FIG. 12, let

Center distance = D3 between action point shaft 75 and left end bearing 94

The center distance between the bearing 94 on the left end and the bearing 94 on the right end = D3

Center distance = D3 between force point shaft 85 and right bearing 94

Force = P2 applied to force point portion 97

Force = P1 that can be obtained at the action portion 99.

When the right end bearing 94 of fig. 12 is used, the bearing becomes (D3 + D3) × P1= D3 × P2, and P1 becomes half of P2.

When the bearing 94 at the left end in fig. 13 is used, D3 × P1= (D3 + D3) × P2 is obtained, and P1 is 2 times as large as P2.

When the center bearing 94 is used, P1= P2 is assumed as in fig. 7.

By changing the position of the fulcrum shaft 95 at the time of assembling the screen printing apparatus 100 in this way, the pressure can be changed even with the same cylinder 81.

Embodiment 4.

In embodiment 4, a point different from the above-described embodiments will be described.

In the screen printing apparatus 100 according to embodiment 4, the length of the lever 91 is extended and the operation point shaft 75 is provided at the center of the fulcrum shaft 95 and the force point shaft 85.

The lever mechanism 90 has a fulcrum portion 98 disposed at the left end of the frame 52.

The force point portion 97 is disposed outside the action portion 99 with respect to the center of the frame 52.

The fulcrum portion 98 is disposed outside the working portion 99 with respect to the center of the frame 52.

Here, as shown in FIG. 14, let us say

Center distance between action point shaft 75 and fulcrum shaft 95 = D4

The center distance between the force point shaft 85 and the fulcrum shaft 95 = D4

Force = P2 applied to force point portion 97

Force = P1 that can be obtained at the action portion 99.

In the case of fig. 14, D4 × P1= (D4 + D4) × P2, and P1 is 2 times as large as P2.

Embodiment 5.

In embodiment 5, a point different from the above-described embodiments will be described.

In the screen printing apparatus 100 according to embodiment 5, the force point shaft 85 is provided between the action point shaft 75 and the fulcrum shaft 95.

Here, as shown in FIG. 15, let

The center distance between the action point shaft 75 and the fulcrum shaft 95 = D5

The center distance between the force point shaft 85 and the fulcrum shaft 95 = D5

Force = P2 applied to force point portion 97

Force = P1 that can be obtained at the action portion 99.

In the case of fig. 15, (D5 + D5) × P1= D5 × P2, and P1 is half of P2.

Embodiment 6.

In embodiment 6, points different from those of the above-described embodiments will be described.

The screen printing apparatus 100 according to embodiment 6 bends the lever 91 by 90 degrees to form an L-shape.

The cylinder 81 is fixed to the upper surface side of the frame 52 by a pedestal 59.

The cylinder 81 is fixed laterally, and the piston rod 82 reciprocates in the horizontal direction.

The flexion position of the lever 91 may also be changed.

The flexion angle of the lever 91 can also be changed.

The lever 91 may also be bent.

Embodiment 7.

In embodiment 7, a point different from the foregoing embodiment will be described.

The screen printing apparatus 100 according to embodiment 7 fixes the bottom surface of the cylinder 81 to the upper surface side of the frame 52.

The lever mechanism 90 performs a position changing operation and a reversing operation even when the bottom surface of the cylinder 81 is fixed to the upper surface side of the frame 52.

Embodiment 8.

In embodiment 8, points different from those in the above-described embodiments will be described.

Fig. 18 is a front view of a screen printing apparatus 100 according to embodiment 7.

The screen printing apparatus 100 of embodiment 8 shows a case where two lever mechanisms 90 are provided for one holder 61.

When the width of the holder 61 in the left-right direction is long, the lever mechanism 90 is provided at the right and left ends, whereby uniform pressure can be generated on the left and right sides as a whole.

In the case of fig. 18, the force point portion 97 is also disposed outside the acting portion 99 with respect to the left and right centers of the frame 52.

Embodiment 9.

In embodiment 9, points different from those of the above-described embodiments will be described.

Fig. 20 is a CC sectional view of screen printing apparatus 100 of fig. 19 according to embodiment 9.

The screen printing apparatus 100 according to embodiment 9 is provided with one lever mechanism 90 in the front-rear direction.

The screen printing apparatus 100 according to embodiment 9 moves up and down the pressing rod 72 to which the squeegee 68 is fixed and the pressing rod 172 to which the squeegee 65 is fixed by using one cylinder 81 and one lever 91.

As shown in fig. 20, the lever 91 is provided with a force point shaft 85, an action point shaft 75, a fulcrum shaft 95, and an action point shaft 175 in this order in the front-rear direction.

Since the operating point shaft 75 is disposed between the force point shaft 85 and the fulcrum shaft 95, the force that can be obtained by the operating point shaft 75 becomes larger than the force applied to the force point shaft 85.

Since the operating point shaft 175 is disposed outside the force point shaft 85 and the fulcrum shaft 95, the force that can be obtained by the operating point shaft 175 is smaller than the force applied to the force point shaft 85.

Thus, a higher pressure can be transmitted to the blade 68 and a lower pressure can be transmitted to the blade 65.

● description of Screen printing method

● print preparation step S10 and application completion step S130

The control unit 110 sets the workpiece 69 on the printing table 64 via the drive mechanism 120 and starts the pre-printing process.

In fig. 19, at the start of printing, the control unit 110 controls the cylinder 81 to lower the piston rod 82.

If the piston rod 82 descends, the lever 91 rotates around the fulcrum shaft 95, the action point shaft 175 ascends, and the action point shaft 75 descends.

If the action point shaft 75 descends, the pressurizing rod 72 descends.

If the point-of-action shaft 175 is raised, the pressurizing rod 172 is raised.

● printing Process S20

After the print preparation step S10, the control unit 110 performs a printing step S20.

● print end step S30 and application preparation step S110

When printing is completed, the control unit 110 controls the cylinder 81 to raise the piston rod 82.

If the piston rod 82 is raised, the lever 91 rotates about the fulcrum shaft 95, the action point shaft 75 is raised, and the action point shaft 175 is lowered.

If the point-of-action shaft 75 rises, the pressurizing rod 72 rises.

If the pressing rod 72 is raised, the holder 61 and the blade 68 are raised.

If the action point shaft 175 descends, the pressurizing rod 172 descends.

If the pressing rod 172 descends, the holder 161 and the scraper 65 descend.

● coating step S120

After the coating preparation step S110 is completed, the control unit 110 performs a coating step S120.

Then, the control unit 110 controls the drive mechanism 120 to execute the printing preparation step S10 and the application completion step S130, and starts printing.

Embodiment 10.

Fig. 23 is a DD end view of the screen printing apparatus 100 of fig. 21.

The screen printing apparatus 100 according to embodiment 10 is provided with the lever mechanism 90 and the lever mechanism 190 in the left-right direction.

The screen printing apparatus 100 according to embodiment 10 moves the two levers 91 up and down by one cylinder 81.

The screen printing apparatus 100 according to embodiment 10 moves up and down the pressing rod 72 to which the squeegee 68 is fixed and the pressing rod 172 to which the squeegee 65 is fixed by one cylinder 81.

In the lever mechanism 90, the acting portion 99 is disposed at the center in the left-right direction of the frame 52, the force point portion 97 is disposed at the right end of the frame 52, and the fulcrum portion 98 is disposed at the left end of the frame 52, as in the lever mechanism 90 of fig. 14.

In the lever mechanism 190, the acting portion 199 is disposed at the center in the left-right direction of the frame 52, the force point portion 197 is disposed at the right end of the frame 52, and the fulcrum portion 198 is disposed at the center between the acting portion 199 and the force point portion 197, as in the lever mechanism 90 of fig. 1.

As shown in fig. 23, the shaft holding portion 83 has two recesses.

The two recesses rotatably hold the force point portion 97 of the lever 91 and the force point portion 197 of the lever 191 by one force point shaft 85.

Since the lever mechanism 90 has the fulcrum 98 disposed on the left side of the working portion 99 and the lever mechanism 190 has the fulcrum 98 disposed on the right side of the working portion 99, if the force point portion 97 and the force point portion 197 are moved up and down by the common shaft holding portion 83, the vertical movements of the working portion 99 and the working portion 199 become opposite to each other.

Fig. 24 is a front view of the screen printing apparatus 100 at the time of printing.

Fig. 25 is a rear view of the screen printing apparatus 100 at the time of printing.

Fig. 26 is a front view of the screen printing apparatus 100 at the time of application.

The shaft holding portion 83 moves up and down by the up-and-down movement of the piston rod 82 of the cylinder 81.

If the shaft holding portion 83 is lowered, the force point portion 97 and the force point portion 197 are lowered.

When the force point 97 is lowered, the pressing rod 72 to which the squeegee 68 is fixed is lowered as shown in fig. 24.

When the force point 197 descends, the pressing rod 172 to which the scraper 65 is fixed ascends as shown in fig. 25.

If the shaft holding portion 83 rises, the force point portion 97 and the force point portion 197 rise.

When the force point portion 97 rises, the pressing rod 72 to which the squeegee 68 is fixed rises as shown in fig. 26.

If the force point 197 rises, the pressing rod 172 to which the scraper 65 is fixed descends.

Supplement to embodiments

The configuration described with respect to the lever mechanism 90 can also be adopted for the lever mechanism 190.

The printing tool or the working tool is not limited to the squeegee 68 or the workpiece 69. The printing tool or the working tool may be a roller, a drum (drum), a blade (blade), a brush, a spatula (spatula), a brush, a pen (pen), a brush, a nozzle, a tool, or another working tool.

In the embodiment, the case of the screen printing apparatus 100 is described, but the lever mechanism 90 is not limited to the screen printing apparatus 100, and may be used in other apparatuses. For example, the lever mechanism 90 may be used for a painting apparatus, a machining apparatus, a surface processing apparatus, and the like.

The functions of the control unit 110 may be implemented by a combination of software and hardware. That is, a part of the control unit 110 may be implemented by software, and the rest of the control unit 110 may be implemented by hardware.

The embodiments are illustrative of preferred embodiments, and are not intended to limit the scope of the technology of the present invention. Embodiments may also be implemented in part, or in combination with other implementations. Further, the foregoing embodiments may be combined.

Description of the reference numerals

50, a base table; 51 a sliding mechanism; a frame 52; 53 guide bush; 54. 55, 56 through holes; 57 tracks; 59 a pedestal; 60 a printing part; 61 a holder; 62 a guide rod; 63, screen plate making; 64 a printing table; 65 a scraper; 68 a scraper blade; 69 a workpiece; 72 a pressure bar; 76 a semicircular portion; 77 a straight line part; 78 a semicircular portion; 79 long circles; 81 cylinders; 82 a piston rod; 73. 83, 93 shaft holding parts; 74. 174, 84, 194, 94, 194 bearings; 75 point of action axes; an 85 force point axis; 95 fulcrum shafts; a 90 lever mechanism; 91 a lever; 96 a handle; 97. 197 force point part; 98. 198 a fulcrum portion; 99. 199 an active portion; 100 a screen printing device; 110 a control unit; 111 a signal line; 120 a drive mechanism; 153 guide bush; 154. 155, 156 through holes; 161 a holder; 162 a guide rod; 172 a pressure bar; 181 cylinders; 182 a piston rod; 173. 183, 193 shaft holding parts; 175 point of action axis; 185 force point axis; 195 a fulcrum shaft; 190 lever mechanism; 191 a lever; 196 pinch the handle.

Claims

1. A screen printing apparatus is characterized in that,

the disclosed device is provided with:

a frame;

a pressurizing rod for mounting the working tool;

a cylinder having a piston rod and fixed to the frame; and

and a lever mechanism for transmitting the movement of the piston rod to the pressurizing rod.

2. A screen printing apparatus according to claim 1,

the lever mechanism is arranged on one side of the frame;

the work tool and the cylinder are disposed on the other side of the frame.

3. The screen printing apparatus according to claim 1 or 2,

the frame has:

a through hole for passing the pressure rod therethrough; and

a through hole for passing the piston rod therethrough.

4. A screen printing apparatus according to any one of claims 1 to 3,

the lever mechanism has a lever mounted on the pressure rod and the piston rod.

5. The screen printing apparatus according to claim 4,

the lever has:

a force point unit attached to the piston rod;

an action part mounted on the pressurizing rod; and

and a fulcrum portion attached to the frame.

6. The screen printing apparatus according to claim 5,

the force point part is arranged outside the action part with the left and right center of the frame as a reference.

7. A screen printing apparatus according to claim 5 or 6,

the fulcrum part is provided with a circular bearing;

the force point portion and the action portion have bearings that enable the shaft to slide.

8. A screen printing method is characterized in that,

the movement of the piston rod of the cylinder is transmitted to the pressurizing rod on which the working tool is mounted by means of a lever mechanism.

9. A screen printing method as claimed in claim 8,

by the lever mechanism, the upward force and the downward force are reversed and the positions of the upward force and the downward force are changed.