WO2020065741A1

WO2020065741A1 - Screen printing apparatus and screen printing method

Info

Publication number: WO2020065741A1
Application number: PCT/JP2018/035546
Authority: WO
Inventors: 洋一田上; 小島　一夫
Original assignee: マイクロ・テック株式会社
Priority date: 2018-09-26
Filing date: 2018-09-26
Publication date: 2020-04-02
Also published as: KR20210046720A; JPWO2020065741A1; CN112689563A; TW202012194A; JP7016188B2; CN112689563B; KR102482645B1; TWI745635B

Abstract

The present invention comprises a holder (20), a slide mechanism (30) that slides the holder, a squeegee arm (40) that has one end and another end, a squeegee unit (50) that is fixed to the one end of the squeegee arm and has a squeegee, a swing mechanism (70) which is arranged between the other end of the squeegee arm and the holder and in which the squeegee arm is attached so as to be swingable with respect to the holder, and a swing control unit (80) that controls a swing of the squeegee arm by the swing mechanism.

Description

Screen printing apparatus and screen printing method

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

スクリーン Conventionally, there is a screen printing apparatus for printing a curved surface.

JP 2017-222162 A

スクリーン The conventional screen printing device for printing curved surfaces has a complicated structure, a large number of parts, and is large in size.

The present invention aims to provide a screen printing apparatus having a simple structure and a reduced size.

The screen printing apparatus according to the present invention includes:
A holder,
A slide mechanism for sliding the holder,
A squeegee arm having one end and the other end,
A squeegee unit fixed to the one end of the squeegee arm and having a squeegee;
A swing mechanism disposed between the other end of the squeegee arm and the holder, and the squeegee arm swingably attached to the holder;
A swing control unit that controls a swing of the squeegee arm by the swing mechanism.

According to the present invention, since the squeegee unit is fixed by the squeegee arm, the structure of the screen printing device is simplified, and the size of the screen printing device can be reduced.

FIG. 2 is a plan view of the screen printing apparatus 100 according to the first embodiment. FIG. 2 is a front view of the screen printing apparatus 100 as viewed from AA of the screen printing apparatus 100 in FIG. 1. FIG. 2 is a perspective view of the holder 20 as viewed from BB of the screen printing apparatus 100 in FIG. 1. FIG. 2 is a plan view of a holder 20 and a swing mechanism 70 of the screen printing apparatus 100. FIG. 3 is a plan view of a slide mechanism 30. FIG. 6 is a side view of the slide mechanism 30 of FIG. 5 as seen from EE. FIG. 2 is a side view of the holder 20, the squeegee arm 40, and the squeegee unit 50 of the screen printing apparatus 100 shown in FIG. FIG. 3 is a three-side view of a squeegee arm 40 and a squeegee unit 50. FIG. 4 is an explanatory view of a swing mechanism 70. FIG. 4 is an explanatory diagram of a swing control unit 80. FIG. 2 is a side view of the screen printing apparatus 100 shown in FIG. 1 as viewed from DD. FIG. 9 is a diagram illustrating a swing mechanism 70 of the screen printing apparatus 100 according to the second embodiment. FIG. 11 is a diagram illustrating a swing mechanism 70 of the screen printing apparatus 100 according to the third embodiment.

In the following description of the embodiments, directions such as “up”, “down”, “left”, “right”, “front”, “rear”, “front”, and “back” are used for convenience of description. , And does not limit the arrangement, orientation, and the like of the devices, instruments, parts, and the like.
In the following description of the embodiments, a “mechanism” is a machine, a device, or a mechanism configured by a plurality of components. Further, the “mechanism” is a mechanical structure, a mechanical device, or a mechanical device configured to provide one purpose.

Embodiment 1 FIG.
FIG. 1 is a plan view of the screen printing apparatus 100. FIG.
FIG. 2 is a front view of the screen printing apparatus 100 as viewed from AA of the screen printing apparatus 100 of FIG.
In FIG. 1, X indicates the left-right direction, and Y indicates the front-back direction.
The printing direction of the screen printing device 100 is the left direction in FIG.
In FIG. 2, Z indicates a vertical direction.

<<< Configuration of Screen Printing Apparatus 100 >>>
The screen printing apparatus 100 includes a holder 20 and a slide mechanism 30 that slides the holder 20 right and left.
The screen printing apparatus 100 includes a squeegee arm 40 and a squeegee unit 50.
The screen printing apparatus 100 has a swing mechanism 70 between the holder 20 and the squeegee arm 40.
The screen printing apparatus 100 includes a swing control unit 80 that controls a swing between the squeegee arm 40 and the squeegee unit 50.
The screen printing apparatus 100 has a scraper arm 140 and a scraper unit 150.
The screen printing device 100 has a frame 90.

<<<< Configuration of Frame 90 >>>>
The frame 90 fixes each component and each mechanism of the screen printing apparatus 100.
The frame 90 has a plate mounting portion 93 for fixing a screen plate 91.
The screen plate 91 has a screen 92 on which a print pattern is formed.
The frame 90 has a table 98 on which a curved work 99 is placed.

<<<< Description of holder 20 >>>>
The front part of the holder 20 will be described with reference to FIGS.
The holder 20 has a back plate 21.
The back plate 21 is a rectangular plate.
The back plate 21 fixes the up-down mechanism 22 and the linear mechanism 29.

<< Up-down mechanism 22 >>
The holder 20 has an up-down mechanism 22.
The up-down mechanism 22 moves the swing mechanism 70, the squeegee arm 40, and the squeegee unit 50 up and down.
The up-down mechanism 22 has a fixed portion 221 and a moving plate 222.
The fixing portion 221 is fixed to the back plate 21.
The moving plate 222 can move up and down with respect to the fixed part 221.
The up-down mechanism 22 can be realized by an air slide table or another slide table.
The up-down mechanism 22 has a swing mechanism 70 fixed to the front surface.

<< Linear mechanism 29 >>
The holder 20 has a linear mechanism 29.
The linear mechanism 29 moves the scraper arm 140 and the scraper unit 150 up and down.
The linear mechanism 29 has a linear guide 26, a bridge 27, and a cylinder 28.
The cylinder 28 is fixed to the back plate 21.
The linear guides 26 are on both sides of the cylinder 28 and are fixed to the back plate 21.
The bridge 27 has a U-shape in plan view, and is attached to the linear guide 26 so as to cover the cylinder 28.
The bridge 27 has a scraper arm 140 fixed to the front surface.
The scraper arm 140 and the bridge 27 are moved up and down along the linear guide 26 by the cylinder 28.

The rear part of the holder 20 will be described with reference to FIGS.
The holder 20 has a horizontal plate 23 and a vertical plate 24.
The horizontal plate 23 is a rectangular plate.
The horizontal plate 23 is horizontally fixed to the vertical center of the rear surface of the back plate 21.
The vertical plate 24 is a rectangular plate whose rear corner is inclined.
The vertical plate 24 is fixed to the back plate 21 and the horizontal plate 23.
The vertical plate 24 is vertically fixed to the left and right central portions of the rear surface of the back plate 21.
The vertical plate 24 is vertically fixed to the left and right central portions of the upper surface of the horizontal plate 23.
The back plate 21, the horizontal plate 23, and the vertical plate 24 are orthogonal to each other.
The holder 20 has a top plate 25.
The top plate 25 is fixed to the upper surface of the back plate 21.
The top plate 25 is a thin rectangular plate.

<<< Description of the slide mechanism 30 >>>
The slide mechanism 30 will be described with reference to FIGS.
The slide mechanism 30 is fixed to the frame 90.
The slide mechanism 30 slides the holder 20 left and right.
The slide mechanism 30 has a belt 31 and a controller 32.
The belt 31 is a timing belt stretched in the left-right direction.
The controller 32 has a motor for rotating the belt 31 and controls the rotation of the belt 31.
The slide mechanism 30 has a shaft 33, a linearly moving portion 34, and a belt fixing portion 36.
The shaft 33 is a cylindrical shaft arranged in the left-right direction.
The shafts 33 are on both sides of the belt 31 and are parallel to the belt 31.
The translation part 34 is a component that slides on the shaft 33.
The translation part 34 is fixed to the lower surface of the horizontal plate 23.
The belt fixing portion 36 fixes the belt 31 to the lower surface of the horizontal plate 23.
When the belt 31 moves in the left-right direction, the horizontal plate 23 also moves in the left-right direction.
The horizontal plate 23 linearly moves in the left-right direction by the shaft 33 and the linearly moving portion 34.
The slide mechanism 30 has two sensors 35 in the left-right direction.
The sensor 35 monitors passage of the table 25.
The detection of the top plate 25 by the sensor 35 controls the movement of the holder 20 to the left and right.

<<< Description of Squeegee Arm 40 >>>
The squeegee arm 40 will be described with reference to FIGS.
The squeegee arm 40 exists like an arm horizontally in the front-rear direction, and has one end 43 and the other end 44.
One end 43 of the squeegee arm 40 fixes the squeegee unit 50.
The other end 44 of the squeegee arm 40 fixes the swing mechanism 70.
The squeegee arm 40 has a main plate 41 and a reinforcing plate 42 orthogonal to the main plate 41.
The main plate 41 is a rectangular plate.
The length of the main plate 41 in the front-rear direction, the length in the up-down direction, and the length in the left-right direction have the following relationship.
"Length in the front-rear direction> length in the vertical direction> length in the left-right direction"
The reinforcing plate 42 is a rectangular plate having a shorter length in the front-rear direction than the main plate 41.
The reinforcing plate 42 is fixed to the main plate 41.
The reinforcing plate 42 is vertically fixed to the left surface of the main plate 41.
The reinforcing plate 42 is fixed on the same side as the printing direction.

<<< Description of Squeegee Unit 50 >>>
The squeegee unit 50 will be described with reference to FIGS.
The squeegee unit 50 has a squeegee 51 at a lower end.
The squeegee 51 has a leading end S that contacts the screen 92 during printing.
The squeegee unit 50 has a pressing mechanism 52 that presses the squeegee 51 against the screen 92.
The pressure mechanism 52 has a fixed part 221 and a moving plate 222.
The fixing part 521 is fixed to one end 43 of the squeegee arm 40.
The moving unit 522 can move up and down with respect to the fixed unit 521.
The pressing mechanism 52 can be realized by an air slide table or another slide table.

<<<< Description of swing mechanism 70 >>>>
The swing mechanism 70 will be described with reference to FIGS.
The swing mechanism 70 is disposed between the other end 44 of the squeegee arm 40 and the holder 20.
The swing mechanism 70 attaches the squeegee arm 40 to the holder 20 so as to be able to swing.
The squeegee arm 40 and the up-down mechanism 22 are attached at positions corresponding to the front and rear of the swing mechanism 70.
The swing mechanism 70 has a fixed plate 71 and a swing plate 72.
The fixed plate 71 and the swing plate 72 are rectangular plates.
The fixing plate 71 is fixed to the holder 20.
The fixed plate 71 is fixed to the moving plate 222 and moves up and down as the moving plate 222 moves up and down.
The swing plate 72 is fixed to the other end 44 of the squeegee arm 40.
The swing mechanism 70 has a cam 73 and a cam follower 74.

<<< Cam 73 >>>
The cam 73 is an arc-shaped part.
The material of the cam 73 is hardened steel, and is preferably a hardened SK material (carbon tool steel) or a hardened SKS material (alloy tool steel).
As shown in FIG. 9, the cam 73 has a central axis O.
The center axis O is located at a position that matches the leading end S of the squeegee 51 during printing.
The end surface of the other end 44 of the squeegee arm 40 is fixed to the upper right corner of the swing plate 72 such that the center axis O and the tip end S coincide with each other.
The cam 73 has an upper cam 731 and a lower cam 732.
The upper cam 731 is fixed to an upper portion of the fixing plate 71.
The lower cam 732 is fixed to a lower part of the fixing plate 71.
The radial cross section of the upper portion of the upper cam 731 has a V-shaped convex shape.
The lower cross section of the lower cam 732 has a V-shaped convex cross-section in the radial direction.
The upper cam 731 and the lower cam 732 have a common center axis O.
The central angle passing through the center of the upper cam 731 and the central angle passing through the center of the lower cam 732 are the same angle N.

<< Cam Follower 74 >>
The cam follower 74 is a component that holds the cam 73 from above and below.
The material of the cam follower 74 is bearing steel, and SUJ material (high carbon chromium bearing steel) is preferable.
A plurality of cam followers 74 are provided above and below the cam 73.
The cam follower 74 has an upper cam follower 741 and a lower cam follower 742.
The two upper cam followers 741 are fixed horizontally above the swing plate 72.
The two lower cam followers 742 are horizontally fixed below the swing plate 72.
The upper cam follower 741 moves above the upper cam 731.
The lower cam follower 742 moves below the lower cam 732.
The cross-sectional shape in the radial direction of the upper cam follower 741 has a V-shaped groove shape.
The cross-sectional shape of the lower cam follower 742 in the radial direction is a V-shaped groove.
The upper cam follower 741 moves by fitting a groove into the convex shape of the upper cam 731.
The lower cam follower 742 moves by fitting a groove into the convex shape of the lower cam 732.
As shown in FIG. 9, the upper cam follower 741 and the lower cam follower 742 are installed on the same radius.
The central angle passing through the centers of the two upper cam followers 741 and the central angle passing through the centers of the two lower cam followers 742 are the same angle M.

The squeegee arm 40 and the squeegee unit 50 are supported only by the swing mechanism 70.
The fixed plate 71 and the swing plate 72 of the swing mechanism 70 are assembled only by fitting the cam 73 and the cam follower 74 together.
Therefore, the squeegee arm 40 and the squeegee unit 50 are held only by the engagement between the cam 73 of the fixed plate 71 and the cam follower 74 of the swing plate 72.
The engagement between the cam 73 and the cam follower 74 may be sufficient if it has strength enough to withstand the printing pressure.
The material of the cam 73 is hardened steel, the material of the cam follower 74 is bearing steel, and the fitting strength between the cam 73 and the cam follower 74 is increased by using high hardness steel.

The fixed plate 71 and the swing plate 72 are not separated by the convex shape of the cam 73 and the groove shape of the cam follower 74.
In order to prevent the fixed plate 71 and the swing plate 72 from coming off, the area formed by the four central axes of the upper cam follower 741 and the lower cam follower 742 is increased. Specifically, the upper cam follower 741 and the lower cam follower 742 are arranged as follows.
(1) The upper cam 731 and the lower cam 732 are arranged above and below the center of the fixing plate 71 in the vertical direction, and are separated vertically as much as possible.
(2) The two upper cam followers 741 are arranged on the right and left of the center of the fixed plate 71 in the left and right direction, and are separated from the left and right as much as possible.
(3) The two lower cam followers 742 are disposed on the right and left of the left and right center of the fixed plate 71 and are separated as much as possible from left to right.
(4) The upper cam follower 741 is arranged on the upper cam 731. The lower cam follower 742 is disposed below the lower cam 732.

However, since the position of the central axis O is the position to be the tip end portion S of the squeegee 51, it is desirable that no part be placed at the position of the central axis O. It is desirable that the height L2 of the center axis O and the center axis of the lower cam follower 742 be one third or more of the height L1 of the swing plate 72.

<< Swing fixing part 79 >>
The swing mechanism 70 has a swing fixing part 79.
The swing fixing section 79 prohibits the swing of the swing mechanism 70.
The swing fixing portion 79 has a hole 791, a pin 792, and a cylinder 793.
The hole 791 is a hole formed in the fixing plate 71.
The opening of the hole 791 has a tapered portion.
The hole 791 is provided above the cam 73.
The pin 792 is fixed to the swing plate 72.
The cylinder 793 is a rod that moves in the front-rear direction by the pin 792.
The cylinder 793 is inserted into the hole 791.
By inserting the cylinder 793 into the hole 791, the swing plate 72 is fixed and cannot swing.

<<< Description of Swing Control Unit 80 >>>
The swing control unit 80 will be described with reference to FIG.
The swing control unit 80 controls the swing of the squeegee arm 40 by the swing mechanism 70.
The swing control unit 80 is installed immediately after the screen plate 91 in the front-back direction.
The swing control section 80 has a guide 81 having a curved surface and a guide mounting section 83.
The guide 81 is an arc-shaped plate having the same curved surface as the work 99.
The guide 81 is installed above the screen plate 91.
The guide attachment portion 83 is fixed to the frame 90.
There are two guide mounting portions 83 on the left and right, and fixes both ends of the guide 81.
The swing control unit 80 has a plurality of guide rollers 82 that move along a guide.
There are at least two guide rollers 82 horizontally in the left-right direction.
The guide roller 82 is attached to the swing plate 72.
The guide rollers 82 are attached to the front surfaces on both sides of the swing plate 72.
The two guide rollers 82 make contact with the curved surface of the guide 81 during printing, and swing the fixed plate 71.

から Since the position of the central axis O is the position to be the leading end S of the squeegee 51, it is desirable that no part be placed at the position of the central axis O. The guide 81 is installed above the screen plate 91, and the height L3 of the center axis O and the center axis of the guide roller 82 is desirably one third or more of the height L1 of the swing plate 72.

<< Description of scraper arm 140 >>
The scraper arm 140 will be described with reference to FIGS.
The scraper arm 140 exists like an arm horizontally in the front-rear direction.
One end of the scraper arm 140 fixes the scraper unit 150.
The other end of the scraper arm 140 fixes the bridge 27.
The scraper arm 140 has an L-shaped projection 141 below the other end.
The L-shaped projection 141 is moved up and down by the cylinder 28.
As the L-shaped projection 141 moves up and down, the scraper unit 150 moves up and down.

<< Description of scraper unit 150 >>
The scraper unit 150 is fixed to one end of the scraper arm 140.
The scraper unit 150 has a scraper 151.

<<<< Overall configuration description >>>>
The screen printing apparatus 100 mounts the squeegee unit 50 with the squeegee unit 50 cantilevered by the squeegee arm 40.
The squeegee unit 50 and the holder 20 are fixed at the same height before and after the squeegee arm 40, and the squeegee arm 40, the squeegee unit 50, and the holder 20 have the same or almost the same height.
The highest part of the screen printing apparatus 100 is not the frame 90 but the highest part of the squeegee arm 40, the squeegee unit 50, and the holder 20.
The squeegee unit 50 and the slide mechanism 30 are mounted at corresponding positions before and after the holder 20.
The squeegee unit 50 is provided in front of the holder 20, and the slide mechanism 30 is provided immediately after the holder 20, so that the squeegee unit 50 does not float even if the squeegee unit 50 receives a lifting force during the operation of the screen printing apparatus 100. .
The slide mechanism 30 has two parallel shafts 33 spaced apart, and linearly moves the holder 20 in the left-right direction.

<<<< Description of screen printing method >>>>
The screen printing method of the screen printing apparatus 100 will be described with reference to FIGS.
The screen printing apparatus 100 includes a central processing unit (not shown), a memory storing a program, and an operation panel, and the following operations are started by operation of the operation panel and executed by the central processing unit. It can be realized by a program.
A squeegee unit 50 having a squeegee is fixed to one end 43 of the squeegee arm 40.
The holder 20 is attached to the other end 44 of the squeegee arm 40 via a swing mechanism 70.
It is assumed that the screen plate 91 is set on the frame 90, the work 99 is set on the table 98, and the screen 92 is coated with ink.
It is also assumed that the squeegee unit 50 has been moved to the left print start position by the slide mechanism 30.
It is also assumed that the scraper arm 140 and the scraper unit 150 are located above the cylinder 28.

<Initial setting step>
Remove the pin 792 of the swing fixing portion 79 from the hole 791.
The swing mechanism 70, the squeegee arm 40, and the squeegee unit 50 are moved downward by the up-down mechanism 22.
The guide roller 82 contacts the guide 81.
The controller 31 rotates the belt 31 to the left.
The rotation of the belt 31 causes the holder 20 to move leftward, and the guide roller 82 moves leftward along the guide 81.
The squeegee 51 is moved downward with respect to the squeegee arm 40 by the pressing mechanism 52.

<Printing step>
FIGS. 9A and 10A show a printing start state.
FIGS. 9B and 10B show a printing state.
FIG. 9C and FIG. 10C show a printing end state.
During printing, the holder 20 is slid to the left by the slide mechanism 30.
During printing, the swing mechanism 70 is kept pressed downward by the up-down mechanism 22 so that the guide roller 82 does not separate from the guide 81.
During printing, the pressure mechanism 52 keeps the squeegee 51 generating printing pressure on the screen 92.
During printing, screen printing is performed while the squeegee arm 40 is swung about the tip end S of the squeegee 51 by the swing mechanism 70.
During printing, the tip S of the squeegee 51 coincides with the center axis O of the swing by the swing mechanism 70.

<Post-processing step>
The swing mechanism 70, the squeegee arm 40, and the squeegee unit 50 are moved upward by the up-down mechanism 22.
The pin 792 of the swing fixing portion 79 is inserted into the hole 791 to inhibit the swing.
Since the opening of the hole 791 has a tapered portion, the pin 792 is inserted into the hole 791 by the tapered portion even if the position of the pin 792 and the hole 791 are shifted.

<Coating step>
The cylinder 28 moves the scraper arm 140 and the scraper unit 150 downward.
The controller 31 rotates the belt 31 rightward.
Due to the rotation of the belt 31, the holder 20 moves rightward.
As the holder 20 moves, the scraper unit 150 coats the screen 92 with ink.
The cylinder 28 moves the scraper arm 140 and the scraper unit 150 upward.
The work 99 is carried out.

<<< Effect of Embodiment 1 >>>
According to the present embodiment, since the squeegee unit 50 is fixed only by the squeegee arm 40, the structure of the screen printing apparatus is simplified, and the size of the screen printing apparatus 100 can be reduced.
Since the squeegee arm 40 exists only on the rear side of the squeegee unit 50, open spaces are formed on the upper side, the front side, the left side, and the right side of the squeegee unit 50, and the visibility and workability of the worker are improved.

<<< Modification example >>>

Modification example 1.
The cam 73 of the swing mechanism 70 may be fixed to the swing plate 72, and the cam follower 74 may be fixed to the fixed plate 71.
The upper cam 731 of the swing mechanism 70 may be fixed to the swing plate 72, and the upper cam follower 741 may be fixed to the fixed plate 71.
The lower cam 732 of the swing mechanism 70 may be fixed to the swing plate 72, and the lower cam follower 742 may be fixed to the fixed plate 71.

Modification example 2.
The reinforcing plate 42 of the squeegee arm 40 may be fixed to the right of the main plate 41.
The reinforcing plate 42 of the squeegee arm 40 may be omitted if the main plate 41 is rigid.

Modification example 3.
The work 99 may have either a concave surface or a convex surface as long as the guide 81 matches the curved surface of the work 99.
The cross-sectional shape of the workpiece 99 in the left-right direction is not limited to an arc, but may be an elliptical arc, a combination of a plurality of arcs having different radii, or a combination with a straight line.

Modification example 4.
The central angle passing through the centers of the two upper cam followers 741 may be different from the central angle passing through the centers of the two lower cam followers 742. The center angle passing through the center of the two upper cam followers 741 is preferably larger than the center angle passing through the center of the two lower cam followers 742.

Modification 5
The above-mentioned up-down mechanism 22 may be attached to the back plate 21 with the front and rear reversed.
The above-described pressurizing mechanism 52 may be mounted on the squeegee arm 40 with the left and right reversed.
The swing mechanism 70 described above may be mounted with its front and back reversed.
The components of the swing mechanism 70 described above may be mounted upside down.

The linear mechanism 29 described above may be used instead of the up-down mechanism 22 described above, and vice versa.
The above-described up-down mechanism 22 may be used instead of the above-described pressurizing mechanism 52, and vice versa.
The above-described pressurizing mechanism 52 may be used instead of the above-described linear mechanism 29, and vice versa.

The swing mechanism 70 may have another configuration as long as it can swing.
The up-down mechanism 22 may have another configuration as long as it can move up and down.
The linear mechanism 29 may have another configuration as long as it can move up and down.
The slide mechanism 30 may have another configuration as long as it can slide.
The pressing mechanism 52 may have another configuration as long as it can pressurize.
The swing control unit 80 may have another configuration as long as it can control the swing of the swing mechanism 70.

Embodiment 2 FIG.
In this embodiment, points different from the above-described embodiment will be described.
The swing mechanism 70 shown in FIG. 12 has one cam 73.
The arc above the cam 73 is at the top of the swing plate 72.
The arc below the cam 73 is below the swing plate 72.

<<< Effect of Embodiment 2 >>>
If the number of cams 73 is one, the number of parts can be reduced.
If the number of the cams 73 is one, the distance between the upper part and the lower part of the cam 73 can be reliably set to a constant value.

Embodiment 3 FIG.
In this embodiment, points different from the above-described embodiment will be described.
The swing mechanism 70 shown in FIG. 13 uses a ball bearing 75 instead of the lower cam 732 and the lower cam follower 742.
The rotation axis of the ball bearing 75 is the same as the center axis O of the cam 73.
The inner race of the ball bearing 75 is fixed to a fixed plate 71.
The outer race of the ball bearing 75 is fixed to the swing plate 72.
As the ball bearing 75, it is preferable to use an angular contact ball bearing suitable for a combination of a radial load and an axial load.

<<< Effect of Embodiment 2 >>>
The swing plate 72 can swing with respect to the fixed plate 71 by the ball bearing 75.
The center of the swing of the swing plate 72 can be accurately arranged by the ball bearing 75.

*** Supplementary explanation of the embodiment ***
The embodiments described above are examples of preferred embodiments, and are not intended to limit the technical scope.
The above-described embodiment may be partially implemented, or may be implemented in combination with another embodiment.

20 holder, 21 back plate, 22 up / down mechanism, 221 fixed part, 222 moving plate, 23 horizontal plate, 24 vertical plate, 25 top plate, 26 linear guide, 27 bridge, 28 cylinder, 29 linear mechanism, 30 slide mechanism, 31 belt, 32 controller, 33 shaft, 34 linear moving part, 35 sensor, 36 belt fixing part, 40 squeegee arm, 41 main plate, 42 reinforcing plate, 43 one end, 44 other end, 50 squeegee unit, 51 squeegee, 52 pressure Mechanism, 521 fixed part, 522 movable part, 70 swing mechanism, 71 fixed plate, 72 swing plate, 73 cam, 731 upper cam, 732 lower cam, 74 cam follower, 741 upper cam follower, 742 roll Arkham follower, 75 ball bearing, 79 swing fixing part, 791 hole, 792 pin, 793 cylinder, 80 swing control part, 81 guide, 82 guide roller, 83 guide mounting part, 90 frame, 91 screen plate, 92 screen, 93 plate Mounting part, 98 部 table, 99 work, 100 screen printing device, 140 scraper arm, 141 L-shaped projection, 150 scraper unit, 151 scraper, S tip, O central axis.

Claims

A holder,
A slide mechanism for sliding the holder,
A squeegee arm having one end and the other end,
A squeegee unit fixed to the one end of the squeegee arm and having a squeegee;
A swing mechanism disposed between the other end of the squeegee arm and the holder, and the squeegee arm swingably attached to the holder;
A screen control device comprising: a swing control unit configured to control a swing of the squeegee arm by the swing mechanism.
The screen printing apparatus according to claim 1, wherein the squeegee arm has a main plate and a reinforcing plate orthogonal to the main plate.
The swing mechanism has a fixed plate fixed to the holder, a swing plate fixed to the other end of the squeegee arm,
The swing control unit has a guide having a curved surface,
The screen printing apparatus according to claim 1, wherein the swing control unit includes a plurality of guide rollers attached to the swing plate and moving along the guide.
The swing mechanism has an arcuate cam and a plurality of cam followers that sandwich the cam,
4. The screen printing apparatus according to claim 1, wherein the squeegee arm and the squeegee unit are held only by fitting the cam and the plurality of cam followers. 5.
The cam has an upper cam and a lower cam,
The screen printing apparatus according to claim 4, wherein the plurality of cam followers include an upper cam follower moving above the upper cam and a lower cam follower moving below the lower cam.
6. The screen printing apparatus according to claim 1, wherein the holder has an up-down mechanism that moves the swing mechanism, the squeegee arm, and the squeegee unit up and down. 7.
The screen printing apparatus according to any one of claims 1 to 6, wherein the swing mechanism has a swing fixing portion for inhibiting a swing.
The squeegee unit has a pressing mechanism having a fixed portion and a moving portion movable with respect to the fixed portion,
The screen printing device according to any one of claims 1 to 7, wherein the squeegee arm fixes the fixing portion to the one end.
The screen printing according to any one of claims 1 to 8, wherein the squeegee arm fixes the squeegee unit such that a tip end of the squeegee coincides with a center axis of a swing by the swing mechanism during printing. apparatus.
The screen printing apparatus according to any one of claims 1 to 9, wherein the squeegee arm and the slide mechanism are mounted at corresponding positions before and after the swing mechanism.
In a screen printing method for performing screen printing on a work having a curved surface,
At one end of the squeegee arm, fix a squeegee unit having a squeegee,
Attach a holder to the other end of the squeegee arm via a swing mechanism,
By the slide mechanism, slide the holder,
A screen printing method for performing screen printing while swinging the squeegee arm around the tip of the squeegee by the swing mechanism.
By an up-down mechanism, the swing mechanism, the squeegee arm, and the squeegee unit are moved downward with respect to the holder,
The screen printing method according to claim 11, wherein the squeegee is moved downward with respect to the squeegee arm by a pressing mechanism.