TW202200400A - Printing device and printing method comprising a printing table, a column, a driving part, a mobile stand, and a frame body - Google Patents

Abstract

The printing device (100) of the present invention comprises a printing table (70) on which a workpiece (99) having a bending section with an arc cross-section relatively parallel to the printing direction is mounted; a column (53) on which the printing table (70) can be rotatably installed about the center line of the bending section; a driving part (56) that rotates the printing table (70) about the center line; a mobile stand (52) for fixing the column (53) and the driving part (56); and a frame body (51) for movably installing the mobile stand (52).

Description

Printing device and printing method

The present invention relates to a printing apparatus and a printing method. Especially with regard to screen printing devices.

In the past, there have been printing devices for workpieces with curved surfaces. [Prior Art Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2017-222162

(The problem that the invention intends to solve)

The present invention provides a printing apparatus for a workpiece having a curved surface. (Technical means to solve problems)

The printing device of the present invention includes: A printing table, which mounts a workpiece having a curved portion whose cross-section is an arc formed by a vertical plane parallel to the printing direction; A support column, which is installed so that the rotation axis of the printing table can be rotated around the center line of the bending portion; a drive unit that rotates the printing table around the center line; a moving table, which is fixed with the above-mentioned support and the above-mentioned driving part; and A casing is mounted so that the above-mentioned mobile station can be moved. (Compared to the efficacy of the prior art)

According to the present invention, workpieces with curved surfaces can be printed.

Embodiments of the present invention will be described below with reference to the drawings. Furthermore, in the description of each embodiment, "up", "down", "left", "right", "front", "rear", "form", "back", "deep", "high" , "width", "front", "vertical", "horizontal" and other directions are described only for the convenience of description, and are not intended to limit the arrangement or orientation of devices, appliances, parts, etc.

Embodiment 1. ✽✽✽ Description of workpiece 99✽✽✽ ●Workpiece 99 (Fig. 4, Fig. 5) The workpiece 99 has a curved portion 992 whose cross-section is an arc formed by a vertical plane parallel to the printing direction. As shown in FIG. 4, the workpiece|work 99 has the following structure. ●Front flat 991 ●Bending part 992 ●Rear flat part 993

The front flat portion 991 is the front half of the printing, and is a portion that presents a flat surface. The flexure 992 is the central portion of the print, and is the flexed portion. The rear flat portion 993 is the rear half of the printing, and is a portion that presents a flat surface.

As shown in FIG. 5 , the radius of the arc of the bending portion 992 is R. Let the line passing through the center of the arc of the bending portion 992 be the center line C of the bending portion 992 . The inner angle of the arc of the bending portion 992 is set to K degrees. When the inner angle of the arc of the bending portion 992 of the workpiece 99 is K degrees, the bending angle of the workpiece 99 is K degrees. That is, when the front flat portion 991 is provided horizontally, the rear flat portion 993 is inclined downward by K degrees from the horizontal.

✽✽✽Description of the Configuration of the Printing Device 100✽✽✽ ●Printing device 100 (FIG. 1, FIG. 2, FIG. 3) The configuration of the printing apparatus 100 will be described with reference to FIGS. 1 , 2 and 3 . A specific example of the printing apparatus 100 is a screen printing apparatus. In FIG. 1, the left-right direction when facing the paper surface is also called a horizontal direction. In FIG. 1, the up-down direction when facing the paper surface is also called a vertical direction. In FIG. 1, the depth direction when facing the paper surface is also called the width direction. In FIG. 1 , the printing direction of the printing apparatus 100 is the left direction.

The printing apparatus 100 performs screen printing on the workpiece 99 placed on the printing table 70 . The printing apparatus 100 performs screen printing using the screen plate 91 and the doctor blade 92 . The printing apparatus 100 has the following structure. ●Frame 51 ● Mobile station 52 ●Pillar 53 ●Cylinder 54 ●Stopper 55 ●Drive unit 56 ●control unit 60 ●Printing table 70

●Frame 51 The frame body 51 becomes the base of the printing apparatus 100 . The frame body 51 is a rectangular metal plate with a long dimension in the left-right direction. The casing 51 is arranged horizontally.

● Mobile station 52 The moving stage 52 is attached so as to be movable in the left-right direction with respect to the housing 51 . The moving stage 52 is a rectangular metal plate with a long dimension in the left-right direction. The moving table 52 is fixed with the following members. (1) Pillar 53 (2) Cylinder 54 (3) Stopper 55 (4) Drive unit 56 (5) Control unit 60

●Pillar 53 A pair of pillars 53 are provided along the width direction of the moving table 52 . The pillars 53 are fixed to the pillars of the mobile stage 52 . The pillar 53 is made of bakelite or metal. The support column 53 is rotatably attached to the printing table 70 at the upper part. The support column 53 is mounted so that the printing table 70 can be rotated around the center line C of the bending portion 992 of the workpiece 99 .

●Cylinder 54 A pair of the cylinders 54 are provided along the left-right direction, and are fixed to the moving table 52 . Cylinder 54 can move the rod up and down. The front end of the rod is hemispherical. The cylinder 54 supports the lower surface of the printing table 70 during printing. The left air cylinder 54 is in contact with the left lower surface of the printing table 70, and supports the left lower surface of the printing table 70 so that the left side of the printing table 70 becomes horizontal. The right cylinder 54 is in contact with the right lower surface of the printing table 70, and supports the right lower surface of the printing table 70 so that the right side of the printing table 70 becomes horizontal.

●Stopper 55 A pair of stoppers 55 are provided along the left-right direction, and are fixed to the moving table 52 . The stopper 55 can adjust the position of the rod up and down. The front end of the rod is hemispherical. The stopper 55 supports the lower surface of the printing table 70 when not printing. The stopper 55 on the left is in contact with the lower surface of the left side of the printing table 70, and the left side of the printing table 70 is prohibited from being rotated to higher than the horizontal plane. The stopper 55 on the right is in contact with the lower surface of the right side of the printing table 70 and prohibits the right side of the printing table 70 from being rotated to higher than the horizontal plane.

●Drive unit 56 The drive unit 56 rotates the gear 77 to rotate the printing table. The drive part 56 has the link mechanism 30 which converts linear motion into rotational motion. The link mechanism 30 of the driving unit 56 includes a slide table 561 and a rack 562 . The slide table 561 mounts the rack 562 so as to be slidable in the left-right direction. The teeth 58 of the rack 562 mesh with the teeth 78 of the gear 77 to rotate the gear 77 . The slide table 561 rotates the printing table 70 around the center line C of the bending portion 992 by moving the rack 562 to the left and right. The link mechanism 30 converts the linear motion of the rack 562 into rotational motion of the printing table 70 centered on the center line C of the flexure 992 .

●control unit 60 The control unit 60 controls the printing apparatus 100 to control the screen printing operation. The control unit 60 can be realized by a central processing device, a program, a memory, and a storage device. The control signal from the control part 60 is transmitted to each part through the signal line 61 as an electric signal. The screen printing operation described below can be realized by the control unit 60 sending and receiving commands and signals using the signal line 61 .

●Printing table 70 (Fig. 4 and Fig. 5) The printing table 70 will be described with reference to FIGS. 4 and 5 . A workpiece 99 is placed on the printing table 70 . The printing table 70 swings around the rotating shaft 75 .

The printing table 70 has the following structure. (1) Bottom plate 71 (2) Bracket 72 (3) Front support plate 73 (4) Rear support plate 74 (5) Clearance portion 76 (6) Gear 77 (7) Rotating shaft 75

●(1) Bottom plate 71 (Fig. 4) The base plate 71 is a base material that determines the shape of the printing table 70 . The bottom plate 71 is made of stainless steel or other metals. The bottom plate 71 can be produced by bending a rectangular metal plate. The bending angle (K degrees) of the base plate 71 is the same as the bending angle (K degrees) of the workpiece 99 .

As shown in FIG. 4, the bottom plate 71 has the following structure. ●Front flat part 711 The front flat portion 711 is the front half of the bottom plate 71 , and is a flat portion. The front flat portion 711 has a length halfway to the curved portion 712 . The left end of the front flat portion 711 exists below the center line C of the bending portion 992 of the workpiece 99 . ●Bending part 712 The curved portion 712 is a portion slightly leftward from the central portion of the bottom plate 71 and is a curved portion. The curved portion 712 is bent with a different radius from the curved portion 992 of the workpiece 99 . The curved portion 712 may also be bent with the same radius R as the curved portion 992 of the workpiece 99 . ●Rear flat part 993 The rear flat portion 713 is the rear half of the bottom plate 71 , and is a flat portion.

●(2) Bracket 72 (Fig. 4) A pair of brackets 72 are provided along the width direction of the printing table 70 . The bracket 72 is a cylindrical hexahedron rod. The bracket 72 is made of aluminum or other metals. The brackets 72 are fixed to both sides of the printing table 70 (front support plate 73 ) with screws 81 ( FIG. 5 ). The bracket 72 has a length from the right end of the front flat portion 711 to the middle of the curved portion 712 . The bracket 72 has the same length as the front flat portion 711 . The left end of the bracket 72 covers the center line C of the bending portion 992 of the workpiece 99 . The bracket 72 attaches the rotating shaft 75 to the upper part of the left end. The bracket 72 attaches the rotation shaft 75 to the position which becomes the center line C of the bending part 992.

(3) Front support plate 73 (Fig. 4) The front support plate 73 is a hexahedron plate. The front support plate 73 is made of bakelite, plastic, other resin, or metal. The front support plate 73 is fixed to the upper surface of the front flat portion 711 with screws 83 ( FIG. 5 ). The front support plate 73 has a length equal to or less than the length of the front flat portion 711 . The front support plate 73 places the front flat portion 991 of the workpiece 99 on the upper surface. The front support plate 73 is a connecting plate that connects the pair of brackets 72 in the width direction.

(4) Rear support plate 74 (Fig. 4) The rear support plate 74 is a hexahedron plate. The rear support plate 74 is made of bakelite, plastic, other resins, or metal. The rear support plate 74 is fixed to the upper surface of the rear flat portion 713 with screws 83 ( FIG. 5 ). The rear support plate 74 has a length equal to or less than the length of the rear flat portion 713 . The rear support plate 74 places the rear flat portion 993 of the workpiece 99 on the upper surface. Since the front flat portion 711 has a length in the middle of the curved portion 712 , the rear support plate 74 is thinner than the front support plate 73 .

(5) Clearance portion 76 (Fig. 5) The gap portion 76 is a space between the left end surface of the front support plate 73 and the right end surface of the rear support plate 74 . A bent portion 992 of the workpiece 99 is arranged on the gap portion 76 .

●(6) Gear 77 (Fig. 5) One gear 77 is provided on one side of the printing table 70 . The gear 77 rotates the rotation shaft 75 of the printing table 70 . The gear 77 is fixed to the bracket 72 of the printing table 70 with screws 82 . The gear 77 has a sector shape. The gear 77 rotates around the rotating shaft 75 . When the gear 77 rotates, the printing table 70 also rotates. The inner angle of the gear 77 is L degrees, and the L degree only needs to be the bending angle K degrees or more. The radius M of the gear 77 is centered on the center line C ( FIG. 5 ) of the bent portion 992 of the workpiece 99 . The radius M of the gear 77 is larger than the radius R of the bending portion 992 of the workpiece 99 . The teeth 78 of the gear 77 are arranged along an arc of radius M.

●(7) Rotating shaft 75 (Fig. 4) A pair of rotating shafts 75 is provided along the width direction of the printing table 70 . The rotating shaft 75 exists in a straight line. The rotation shaft 75 may be a shaft passing through the printing table 70 in the width direction. The rotation shaft 75 is arranged perpendicular to the printing direction, and is arranged horizontally. The rotation shaft 75 is fixed to the shaft of the support column 533 . The rotating shaft 75 penetrates the gear 77 and the bracket 72 . The rotation shaft 75 is rotatably attached to the gear 77 and the bracket 72 . The center line of the rotating shaft 75 coincides with the center line C of the bending portion 992 .

✽✽✽Action Description✽✽✽ The screen printing method of the printing apparatus 100 in which the printing table 70 on which the workpiece 99 is mounted will be rotatably mounted will be described with reference to FIG. 6 . Here, a method of printing the workpiece 99 having the front flat portion 991, the curved portion 992, and the rear flat portion 993 will be described. Furthermore, the printing operation in the leftward direction of the printing apparatus 100 will be described.

✽Preparation for Step S10✽ When the power of the printing apparatus 100 is turned on (ON), the control unit 60 starts to perform the following initial operations. The control part 60 moves the rack 562 of the slide table 561 to the right initial position, and as shown in FIG. 7, rotates the printing table 70 so that the front half becomes horizontal. The left stop 55 prohibits the printing table 70 from being rotated to the left substantially. The control part 60 mounts the workpiece|work 99 on the printing table 70, and arrange|positions the workpiece|work 99 below the screen plate 91 by the unshown carrying-in apparatus. The control unit 60 sucks the workpiece 99 to the printing table 70 by a suction mechanism not shown, and fixes the workpiece 99 to the printing table 70 . The control part 60 raises the rod of the cylinder 54 on the right side. The right cylinder 54 supports the lower surface of the front flat portion 711 in a state in which the front flat portion 991 of the workpiece 99 and the screen 91 are formed in parallel. The control part 60 moves the squeegee 92 to the printing start position on the right side.

✽The first half printing step S20✽ Figure 7 is a diagram showing the first half of printing. The first half printing step S20 is a step of fixing the front half of the printing table 70 on which the front flat portion 991 of the workpiece 99 is placed so as to be parallel to the printing direction, and printing the front flat portion 991 . The control unit 60 starts the movement of the squeegee 92 in the left direction to start printing. During the first half of printing, the control unit 60 locks the slide table 561 to prohibit the rotation of the printing table 70 . During the first half of printing, the control unit 60 stops the movement of the moving stage 52 . In the first half of printing, since the cylinder 54 on the right supports the lower surface of the front flat portion 711 , the printing table 70 will not rotate to the right and the printing table 70 will not be deformed even if printing pressure is applied to the front flat portion 991 . The first half printing step S20 ends when the flat portion 991 is printed before the finished product 99 .

✽ Buckling printing step S30 ✽ Figure 8 is a diagram showing the buckling printing after the first half printing. The bending printing step S30 is a step of printing the bending portion 992 while rotating the printing table 70 around the center line C of the bending portion 992 of the workpiece 99 and moving the printing table 70 in the printing direction. The control part 60 performs the following control simultaneously when printing the bending part 992 of the workpiece|work 99. (1) Slide the rack 562 of the slide table 561 to the left. By moving the rack 562 to rotate the gear 77, the printing table 70 is rotated about the rotation axis 75 (center line C). (2) The moving table 52 is moved in the left direction (printing direction) with respect to the housing 51 . (3) Continue the movement of the scraper 92 in the left direction (printing direction). (4) The rod of the cylinder 54 on the right side is lowered. (5) Raise the rod of the cylinder 54 on the left side. In the flexure printing step S30 , the printing table 70 is rotated by rotating the gear 77 having a larger radius L than the radius R of the flexure 992 . Although the lower surface of the curved portion 992 is the gap portion 76 , the curved portion 992 is not deformed because the curved portion 992 has a convex curved surface even when a printing pressure is applied to the curved portion 992 . The buckling printing step S30 ends when the buckling portion 992 of the finished product 99 is printed.

✽Second half printing step S40✽ FIG. 9 is a diagram showing the second half printing step after buckling printing. The second half printing step S40 is a step of fixing the rear half of the printing table 70 on which the rear flat portion 993 of the workpiece 99 is placed so as to be parallel to the printing direction, and printing the rear flat portion 993 . The control part 60 continues the movement of the scraper 92 in the left direction. In the second half of printing, the control unit 60 locks the slide table 561 and prohibits the rotation of the printing table 70 . During the second half of printing, the control unit 60 stops the movement of the moving stage 52 . In the second half of printing, since the cylinder 54 on the left supports the lower surface of the rear flat portion 713, even if printing pressure is applied, the printing table 70 will not rotate to the left and the printing table 70 will not be deformed. The second half printing step S40 ends when the flat portion 993 is printed after the finished product 99 is printed.

When the printing is completed, the control unit 60 carries out the workpiece 99 whose printing has been completed by the unshown loading and unloading device. The control unit 60 determines whether there is a next print after the workpiece 99 is unloaded, and returns to the preparation step S10 when there is a next print. If there is no next printing, the control unit 60 ends the printing.

圓周率

圓弧相對於圓周之比 =(2

半徑R)

3.14

(K度÷360度) 作為具體例，於半徑R=5mm、K度=35度之情形時，屈曲部992之圓弧長度E將成為如下。 圓弧長度E=(2

5mm)

3.14

(35度÷360度) =10

3.14

35÷360 =3.05277 ≒3.05mm 控制部60具體地進行以下之控制。 (1)以使齒輪77順時針地旋轉35度之方式使滑台561之齒條562朝左滑動。藉由使齒輪77順時針旋轉35度之程度，來使旋轉台70以旋轉軸75為中心順時針地旋轉35度之程度。 (2)使移動台52相對於框體51朝左方向(印刷方向)移動3.05mm。 (3)使刮刀92朝向左方向(印刷方向)移動3.05mm。●Control of the buckling printing step S30 The details of the buckling printing step S30 will be described with reference to FIG. 5 . When the radius of the arc of the bending portion 992 is R and the inner angle is K degrees, the arc length E of the bending portion 992 is as follows. Arc length E=diameter

PI

The ratio of the arc to the circumference = (2

radius R)

3.14

(K degrees÷360 degrees) As a specific example, when the radius R=5 mm and the K degree=35 degrees, the arc length E of the bending portion 992 is as follows. Arc length E=(2

5mm)

3.14

(35 degrees ÷ 360 degrees) = 10

3.14

35÷360=3.05277≒3.05mm The control unit 60 specifically performs the following control. (1) The rack 562 of the slide table 561 is slid leftward so that the gear 77 rotates 35 degrees clockwise. By rotating the gear 77 clockwise by approximately 35 degrees, the turntable 70 is rotated approximately 35 degrees clockwise around the rotating shaft 75 . (2) The moving table 52 was moved 3.05 mm in the left direction (printing direction) with respect to the housing 51 . (3) Move the doctor blade 92 to the left direction (printing direction) by 3.05 mm.

✽✽✽Explanation of the effect of Embodiment 1✽✽✽ The conventional curved surface printing mechanism is used to process the flat curved surface, but there are some cases where it is not suitable for the printing of the curved surface with a small radius. According to Embodiment 1, it is possible to print the curved portion of the arc having a small radius. According to Embodiment 1, since the radius M of the gear 77 is larger than the radius R of the bending portion 992 of the workpiece 99, it can be rotated with high precision. According to Embodiment 1, by making only the base plate 71 whose bending angle is the same as that of the workpiece 99 , it can be used together with other parts of the printing table 70 .

✽✽✽Variation 1 of Embodiment 1✽✽✽ Modification of the drive unit 56, the cylinder 54, and the stopper 55 (FIG. 10) The drive unit 56 shown in FIG. 10 has a motor 563 and a gear 564 . The control unit 60 can rotate the printing table 70 by rotating the gear 564 by the motor 563 . The gear 564 may also not be sector-shaped, and may be circular or semi-circular. The cylinder 54 and the stopper 55 shown in FIG. 10 are arranged in the lateral direction. By arranging the cylinder 54 and the stopper 55 laterally, the upper part of the moving table 52 is vacant, and the rotation angle of the printing table 70 can be enlarged. Furthermore, one cylinder may serve as both the cylinder 54 and the stopper 55 . Also, if the fixation of the printing table 70 by means of the gear 77 and the driving portion 56 can be strong enough to resist the printing pressure, the cylinder 54 is not required.

✽✽✽Variation 2 of Embodiment 1✽✽✽ A modification of the printing table 70 (FIG. 11) The printing table 70 shown in FIG. 11 does not have the front support plate 73 and the rear support plate 74 , but has a bottom plate 71 and a bracket 72 . The bracket 72 is in the shape of a cube, and has a through hole in the center through which the rotating shaft 75 penetrates. The brackets 72 are fixed on both sides of the curved portion 712 of the bottom plate 71 by screws not shown. The front flat portion 711 of the bottom plate 71 supports the front flat portion 991 of the workpiece 99 from below. The curved portion 712 of the base plate 71 has the same arc as the curved portion 992 of the workpiece 99 . The bent portion 712 of the bottom plate 71 supports the bent portion 992 of the workpiece 99 from below. The rear flat portion 713 of the bottom plate 71 supports the rear flat portion 993 of the workpiece 99 from below.

✽✽✽Variation 3 of Embodiment 1✽✽✽ A modification of the printing table 70 and the workpiece 99 (FIG. 12) The gear 77 may not be fan-shaped, but may be circular or semi-circular. Figures 12(a) and (b) are diagrams in which the bending angle is 90 degrees. The inner angle of gear 77 must be more than 90 degrees.

As shown in FIG. 12( a ), the workpiece 99 may have only the front flat portion 991 and the curved portion 992 without the rear flat portion 993 .

As shown in FIG. 12( b ), the workpiece 99 may not have the front flat portion 991 but only the curved portion 992 and the rear flat portion 993 .

FIG. 12( c ) is a diagram in which the workpiece 99 has only the bent portion 992 . The bending portion 992 of the workpiece 99 is sucked by the printing table 70 and fixed to the printing table 70 .

Fig. 12(d) is a diagram in which the inner angle and the bending angle of the bending portion 992 are 180 degrees. The workpiece 99 and the printing table 70 are bent in a U shape. The inner angle of the gear 77 must be more than 180 degrees.

Embodiment 2. In Embodiment 2, the difference from Embodiment 1 will be described.

✽✽✽Description of the Configuration of the Printing Device 100✽✽✽ ●Printing device 100 (FIG. 13, FIG. 14, FIG. 15) The configuration of the printing apparatus 100 will be described with reference to FIGS. 13 , 14 and 15 . A specific example of the printing apparatus 100 is a screen printing apparatus. In the printing apparatus 100 of the second embodiment, the gear 77 is not present, and the configuration of the drive unit 56 is different.

●Drive unit 56 The drive part 56 has the link mechanism 30 which converts linear motion into rotational motion. The link mechanism 30 of the drive unit 56 has a crank mechanism 200 . In FIG. 14 , the drive unit 56 is arranged on the left side of the lower surface of the printing table 70 . The printing table 70 has a support portion 220 fixed to the back surface of the rear flat portion 713 . The support portion 220 is formed in a bimodal shape. The mobile station 52 has a U-shaped clevis 230 fixed to the mobile station 52 . The U-shaped hook 230 is arranged below the front flat portion 711 . The U-shaped hook 230 is formed in a bimodal shape.

●Crank mechanism 200 The crank mechanism 200 includes a support portion 220 , a crank cylinder 210 , a crank shaft 211 , and a U-shaped hook 230 . The crankshaft 211 is linearly moved on the central axis of the crank cylinder 210 by a linear servo motor. The upper end of the crankshaft 211 is rotatably attached to the support portion 220 via a pin 221 . The pins 221 are arranged horizontally at right angles to the printing direction. A cylinder joint 212 is fixed on the lower end of the crank cylinder 210 . The cylinder joint 212 is rotatably mounted on the U-shaped hook 230 by a pin 231 . The pins 231 are arranged horizontally at right angles to the printing direction. The upper and lower ends of the crank mechanism 200 are rotatable, and the angle between the crank mechanism 200 and the upper surface of the moving table 52 can be passively changed through the telescopic sliding of the crank shaft 211 . The crankshaft 211 rotates the printing table 70 around the center line C of the bending portion 992 by pressing the support portion 220 . The link mechanism 30 converts the linear motion of the crank shaft 211 into the rotational motion of the printing table 70 centered on the center line C of the flexure 992 .

✽✽✽Action Description✽✽✽ With reference to FIG. 16, the bending printing step S30 will be described. ✽ Buckling printing step S30 ✽ Figure 16 is a diagram showing the flexural printing after the first half printing. The control unit 60 slides the crankshaft 211 to the upper left when the bending portion 992 of the workpiece 99 is printed. The control part 60 pushes up the support part 220 upwards by moving the crankshaft 211 to the upper left. The support part 220 rotates clockwise about the rotating shaft 75 (center line C), and rotates the printing table 70 clockwise about the rotating shaft 75 (center line C). Since the cylinder joint 212 is rotatably mounted relative to the moving table 52 by the U-shaped hook 230, when the support portion 220 is pushed upward, the inclination angle of the crank cylinder 210 with respect to the horizontal direction increases. Since the crankshaft 211 is rotatably attached to the printing table 70 via the support portion 220 , when the support portion 220 is pushed upward, the inclination angle of the crankshaft 211 with respect to the horizontal direction increases. In the bending printing step S30 , the printing table 70 is pushed up by the crank mechanism 200 , thereby rotating the printing table 70 .

圓周率

圓弧相對於圓周之比 =(2

半徑L)

3.14

(K度÷360度) 控制部60當銷221移動圓弧長度P時，以銷221等速地進行移動之方式使曲柄軸211前進移動。 如於實施形態1中所述般，在屈曲部992之圓弧半徑為R且內角為K度之情形時，藉由銷221移動圓弧長度P，圓弧長度E之屈曲部992會被印刷。When the distance between the pin 221 of the support portion 220 and the central axis C is set to L and the printing table 70 is rotated by K degrees, the arc length P over which the pin 221 moves is as follows. Arc length P = diameter

PI

The ratio of the arc to the circumference = (2

radius L)

3.14

(K degrees÷360 degrees) When the pin 221 moves by the arc length P, the control unit 60 moves the crankshaft 211 forward so that the pin 221 moves at a constant speed. As described in Embodiment 1, when the arc radius of the curved portion 992 is R and the inner angle is K degrees, by moving the arc length P by the pin 221, the curved portion 992 of the arc length E is moved by the pin 221. print.

✽✽✽Variation 1 of Embodiment 2✽✽✽ ● Arrangement of the drive unit 56 In FIG. 13, although the drive part 56 is arrange|positioned so that it may cross|intersect the bending part 992, it may be arrange|positioned only on the left side of the bending part 992, or may be arrange|positioned only on the right side of the bending part 992. In FIG. 14, the drive part 56 may not be the left side of the lower surface of the printing table 70, but may be arranged in the center of the lower surface.

✽✽✽Variation 2 of Embodiment 2✽✽✽ ●Link mechanism 30 The link mechanism 30 is not limited to the crank mechanism 200 as long as it is a mechanism that converts linear motion into rotational motion of the printing table centering on the center line C of the flexure 992 .

The embodiments and modifications of the present invention have been described above, but two or more of these embodiments and modifications may be combined and implemented. Alternatively, one of these embodiments and modifications may be implemented partially. Two or more of these embodiments and modified examples may be partially combined and implemented. In addition, this invention is not limited to these embodiment and modification, Various changes can be made as needed.

30: Linkage mechanism 51: Frame 52: Mobile Station 53: Pillar 54: Cylinder 55: Stopper 56: Drive Department 58: Teeth 60: Control Department 61: Signal line 70: Printing table 71: Bottom plate 72: Bracket 73: Front support plate 74: Rear support plate 75: Rotary axis 76: Clearance 77: Gear 78: Teeth 81: Screws 82: Screws 83: Screws 91: Screen version 92: scraper 99: Workpiece 100: Printing Unit 200: Crank mechanism 210: Crank Cylinder 211: Crankshaft 212: Cylinder joint 220: Support part 221: Pin 230: U hook 231: Pin 553: Pillar 561: Slider 562: Rack 563: Motor 564: Gear 711: Front Flat Part 712: Bend 713: Rear Flat Part 991: Front Flats 992: Flexure 993: Rear Flat C: center line

FIG. 1 is a front view of the printing apparatus 100 according to the first embodiment. FIG. 2 is a right side view of the printing apparatus 100 according to the first embodiment. FIG. 3 is a plan view of the printing apparatus 100 according to the first embodiment. FIG. 4 is an exploded perspective view of the printing table 70 according to the first embodiment. FIG. 5 is a partial enlarged view of the printing table 70 according to the first embodiment. FIG. 6 is a flow chart of the operation of the printing apparatus 100 according to the first embodiment. FIG. 7 is an explanatory diagram of the operation of the first half printing of the printing apparatus 100 according to the first embodiment. FIG. 8 is an explanatory diagram of the operation of the flexural printing by the printing apparatus 100 according to the first embodiment. FIG. 9 is an explanatory diagram of the operation of half printing after the printing apparatus 100 according to the first embodiment. FIG. 10 is an explanatory diagram of a modification of the printing apparatus 100 of the first embodiment. FIG. 11 is an explanatory diagram of a modification of the printing table 70 of the first embodiment. FIG. 12 is an explanatory diagram of a modification of the printing table 70 and the workpiece 99 according to the first embodiment. Figures 12(a) and (b) are diagrams with a bending angle of 90 degrees, Figure 12(c) is a diagram of a workpiece 99 having only a flexure 992, and Figure 12(d) is a diagram of a bending angle of 180 degrees. FIG. 13 is a front view of the printing apparatus 100 of the second embodiment. FIG. 14 is a right side view of the printing apparatus 100 according to the second embodiment. FIG. 15 is a plan view of the printing apparatus 100 according to the second embodiment. FIG. 16 is an explanatory diagram of the operation of the flexural printing by the printing apparatus 100 according to the second embodiment.

51: Frame

52: Mobile Station

53: Pillar

54: Cylinder

55: Stopper

56: Drive Department

58: Teeth

60: Control Department

61: Signal line

70: Printing table

71: Bottom plate

72: Bracket

73: Front support plate

74: Rear support plate

75: Rotary axis

77: Gear

78: Teeth

91: Screen version

92: scraper

99: Workpiece

100: Printing Unit

561: Slider

562: Rack

C: center line

Claims (13)

A printing device is provided with: A printing table, which mounts a workpiece having a curved portion whose cross-section is an arc formed by a vertical plane parallel to the printing direction; A support column, which is installed so that the rotation axis of the printing table can be rotated around the center line of the bending portion; a drive unit that rotates the printing table around the center line; a moving table, which is fixed with the above-mentioned support and the above-mentioned driving part; and A casing is mounted so that the above-mentioned mobile station can be moved. The printing apparatus of claim 1, wherein, The said drive part has a link mechanism which converts linear motion into the rotational motion of the said printing table centering on the center line of the said bending part. The printing apparatus of claim 1 or 2, wherein, The printing table has a sector-shaped gear that rotates the rotating shaft of the printing table, and The drive part meshes with the teeth of the gear to rotate the gear. The printing apparatus of claim 3, wherein, The radius of the gear is larger than the radius of the bending portion. The printing apparatus of claim 1 or 2, wherein, The above-mentioned printing table has a support portion fixed to the back surface, and The said drive part has the crank mechanism which is rotatably attached to the said support part. The printing apparatus of claim 5, wherein, The above crank mechanism has a crank shaft and a crank cylinder, The upper end of the crankshaft is rotatably attached to the support portion, The lower end of the crank cylinder is rotatably attached to the moving table. The printing apparatus of any one of claims 1 to 6, wherein, The above-mentioned printing table has brackets fixed on both sides, and The said holder is attached with the said rotation shaft at the position which becomes the center line of the said bending part. The printing apparatus of any one of claims 1 to 7, wherein, The above printing table has: A plate-shaped bottom plate, which has a front flat portion, a curved portion and a rear flat portion; a front support plate, which is fixed to the above-mentioned front flat portion; and a rear support plate fixed to the above-mentioned rear flat; and A gap portion exists between the front support plate and the rear support plate. The printing apparatus of any one of claims 1 to 8, wherein, It is provided with the cylinder which is fixed to the said moving table, and supports the said printing table. The printing apparatus of any one of claims 1 to 9, wherein, It has a control section for controlling the printing operation, and The control unit moves the moving table in the printing direction while rotating the printing table around the center line by the driving unit when printing the curved portion of the workpiece. A printing method is a printing method of a printing device rotatably installed with a printing table, the printing table is mounted with a workpiece having a front flat part, a curved part and a rear flat part; the printing method comprises: The first half printing step, which fixes the front half of the printing table on which the flat part before the workpiece is placed is parallel to the printing direction, and prints the above-mentioned front flat part; A bending printing step of printing the bending portion while rotating the printing table around the center line of the bending portion of the workpiece and moving the printing table in the printing direction; and In the second half printing step, the rear half of the printing table on which the flat portion after the workpiece is placed is fixed to be parallel to the printing direction, and the rear flat portion is printed. The printing method of claim 11, wherein, The said flexure printing process rotates the said printing table by aligning the rotation axis with respect to the said center line of the said flexure part, and rotating the gear which has a radius larger than the radius of the said flexure part. The printing method of claim 11, wherein, In the buckling printing step, the printing table is rotated by pushing up the printing table by a crank mechanism.

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