JP6723609B2 - Printer - Google Patents

Description

The present invention relates to a printing device capable of switching front surface printing of a web and back surface printing of a web.

In a printing device that prints on a web using a plate cylinder and an impression cylinder, at least one of the plate cylinder and the impression cylinder moves so that the plate cylinder and the impression cylinder are separated from each other , or the plate cylinder and the impression cylinder contact each other, and the web The printing pressure for is adjusted. In that state, the ink is supplied to the plate cylinder by the anilox roll, and the web passes between the plate cylinder and the impression cylinder. The printing device performs printing on each side of the web by switching the front side printing and the back side printing of the web. As such a printing apparatus, conventionally, a roll-fed rotary printing press capable of switching between a plate cylinder and an impression cylinder has been known (see Patent Document 1).

In the conventional printing machine described in Patent Document 1, the plate cylinder and the impression cylinder are respectively connected to the carriage. The carriage is movably supported by the guide member. The flexographic printing inking unit has a chamber doctor and an anilox roll and contacts the sleeve-shaped flexographic printing plate of the plate cylinder. By fixing the flexographic printing inking unit to the carriage together with the plate cylinder, the flexographic printing inking unit moves simultaneously with the movement of the plate cylinder.

In a conventional printing press, the sleeve is removed from the body of the impression cylinder and the flexographic printing plate is placed over the body of the impression cylinder. Further, the flexographic printing plate is pulled out from the body of the plate cylinder, and the sleeve is put on the body of the plate cylinder. As a result, the impression cylinder is switched to the plate cylinder, and the plate cylinder is changed to the impression cylinder. The flexographic printing inking unit is removed from the original carriage and fixed in another carriage with the orientation reversed.

In a conventional printing machine, when only one cylinder (for example, plate cylinder) is moved, the other cylinder (impression cylinder) is connected to the inner wall of the side wall by a bearing. The bearing is attached to the inner wall with screws. Further, the printing machine has a screw nut, a screw shaft, and a drive unit for driving the screw shaft in order to move each carriage. As described above, the conventional printing machine tends to have a complicated structure, and it may take time and effort to adjust each mechanism. In addition, the printing press may become large and the number of parts may increase. Therefore, there is a concern that the cost of the printing machine will increase.

On the other hand, conventionally, a sheet-fed printing press that moves a plate cylinder with respect to an impression cylinder by a double eccentric mechanism is also known. In this conventional printing machine, the plate cylinder or the impression cylinder is supported by a double eccentric mechanism. The double eccentric mechanism has an outer eccentric bearing and an inner eccentric bearing arranged inside the outer eccentric bearing. Due to the two eccentric movements of the double eccentric mechanism, the plate cylinder or the impression cylinder moves to adjust the printing pressure. Further, due to the movement of the plate cylinder or the impression cylinder, the plate cylinder and the impression cylinder are separated from each other or the plate cylinder and the impression cylinder are in contact with each other. However, in the double eccentric mechanism, the number of parts increases and it is necessary to process the parts with high accuracy. Therefore, the cost of the printing machine may increase. Since it is necessary to move the double eccentric mechanism accurately, there is a problem that it takes time to adjust the printing pressure.

JP, 2002-254598, A

The present invention is an invention made in view of the above-mentioned conventional problems, and an object thereof is a printing apparatus capable of switching front-side printing and back-side printing of a web, and a contact pressure between a plate cylinder and an anilox roll by a simple mechanism. The printing pressure is adjusted and the plate cylinder is moved with respect to the impression cylinder while preventing the change in

The present invention is a printing apparatus capable of switching the front side printing and the back side printing of the web by exchanging the positions of the plate cylinder and the impression cylinder with respect to the web. The printing device includes a pair of support shafts that face each other with the web interposed therebetween, a plate cylinder sleeve and an impression cylinder sleeve that are detachably attached to the support shafts different from each other, and the attached support shafts can be changed, and an anilox roll. And an ink supply device that is movable according to the position of the plate cylinder sleeve attached to the support shaft, and a rotating body that holds one of the pair of support shafts and that rotates together with the one support shaft. And When the ink supply device moves according to the position of the plate cylinder sleeve attached to the one support shaft, the rotation center of the anilox roll coincides with the rotation center of the rotating body.

According to the present invention, in a printing apparatus capable of switching between front-side printing of a web and back-side printing of a web, adjustment of printing pressure and impression cylinder are prevented by a simple mechanism while preventing a change in contact pressure between the plate cylinder and anilox roll. The plate cylinder can be moved relative to.

It is a front view of the printing apparatus of the present embodiment. It is a rear view of the printing apparatus of the present embodiment. It is a schematic diagram showing a structure of a printing apparatus of the present embodiment. It is a schematic diagram showing the principal part of the printing device of this embodiment. It is a schematic diagram showing the principal part of the printing device of this embodiment. It is a schematic diagram showing the structure of the printing device at the time of the surface printing of the web. It is a schematic diagram showing a printing device at the time of front surface printing of a web. It is a schematic diagram showing a printing device at the time of front surface printing of a web. FIG. 4 is a view showing a part of FIG. 3 including a plate cylinder and an impression cylinder and a rotating device. FIG. 6 is a schematic view showing a state in which the rotating body shown in FIG. 5 is rotated. FIG. 3 is a cross-sectional view of a rotating body and a rotating device attached to the main body frame. It is a figure which shows the printing pressure adjustment mechanism seen from the arrow X3 direction of FIG.

An embodiment of a printing apparatus of the present invention will be described with reference to the drawings.
The printing device according to the present embodiment is a printing device that can switch between front-side printing and back-side printing of a web. The web is in the form of a strip of printing paper, Ru Tei is wound into a roll. The web is supplied from the supply device to the printing device, and the image is printed on the web by the printing device. The printing apparatus of the present embodiment is a flexographic printing apparatus, and prints an image on the web with a plate (letterpress) of a plate cylinder.

FIG. 1 is a front view of the printing apparatus 1 according to the present embodiment, showing the printing apparatus 1 viewed from one side in the width direction of the web 2. FIG. 2 is a rear view of the printing apparatus 1 according to the present embodiment, showing the printing apparatus 1 viewed from the other side in the width direction of the web 2.
As shown in the figure, the printing apparatus 1 is detachably attached to the plate cylinder 3, the impression cylinder 4, the rotating device 10 for rotating the plate cylinder 3 and the impression cylinder 4, the main body frame 20, and the main body frame 20. An auxiliary frame 30, an ink supply device 40 held by the auxiliary frame 30, a rotating body 50 rotatably connected to the main body frame 20, and a rotating device 60 for rotating the rotating body 50 are provided. The plate cylinder 3 is rotatably supported by the rotating body 50, and the impression cylinder 4 is rotatably supported by the main body frame 20. The plate cylinder 3 and the impression cylinder 4 have the same diameter.

In the printing apparatus 1, the web 2 moves in a predetermined moving direction F and passes between the plate cylinder 3 and the impression cylinder 4. At that time, the printing apparatus 1 prints an image on one surface of the web 2. The plate cylinder 3 and the impression cylinder 4 face each other with the web 2 sandwiched therebetween, and contact one surface and the other surface of the web 2, respectively. The web 2 is sandwiched between the plate cylinder 3 and the impression cylinder 4. Here, the moving direction F of the web 2 is the horizontal direction. Further, one surface of the web 2 is the back surface 2A of the web 2, and the other surface of the web 2 is the front surface 2B of the web 2. The plate cylinder 3 is located on the back surface 2A side of the web 2, and the impression cylinder 4 is located on the front surface 2B side of the web 2.

FIG. 3 is a schematic diagram showing the structure of the printing apparatus 1 of the present embodiment, including a partial cross section of the printing apparatus 1. Further, FIG. 3 shows the respective units of the printing apparatus 1 combined in one drawing. 4 and 5 are schematic diagrams showing the main part of the printing apparatus 1 of the present embodiment, and a part of the printing apparatus 1 cut along line X1-X1 of FIG. 3 is simplified and shown. FIG. 4 shows the printer 1 before the auxiliary frame 30 is attached to the main body frame 20, and FIG. 5 shows the printer 1 after the auxiliary frame 30 is attached to the main body frame 20.

As shown in the figure, the center of the outer peripheral surface of the plate cylinder 3 and the center of the outer peripheral surface of the impression cylinder 4 are arranged horizontally and parallel to each other in the same vertical plane. In this state, the plate cylinder 3 and the impression cylinder 4 are arranged in parallel and face each other in the vertical direction. Further, the printing apparatus 1 includes a pair of support shafts 5 and 6 (first support shaft 5 and second support shaft 6) that are shaft members of the plate cylinder 3 and the impression cylinder 4, and a plate that is an outer peripheral member of the plate cylinder 3. The cylinder sleeve 7 and the impression cylinder sleeve 8 which is an outer peripheral member of the impression cylinder 4 are provided.

A pair of support shafts 5 and 6, while being arranged parallel to, and is placed in the width direction of the web 2. Specifically, like the plate cylinder 3 and the impression cylinder 4, the centers of the outer peripheral surfaces of the pair of support shafts 5 and 6 are horizontal and parallel to each other in the same vertical plane. In that state, the pair of support shafts 5 and 6 are arranged in parallel and face each other in the vertical direction. Further, the web 2 is disposed between the pair of support shafts 5 and 6, and the pair of support shafts 5 and 6 face each other with the web 2 interposed therebetween.

Here, the first support shaft 5 is a lower support shaft located below the web 2, and the second support shaft 6 is an upper support shaft located above the web 2. The support shafts 5 and 6 rotate around their respective rotation centers. The plate cylinder sleeve 7 and the impression cylinder sleeve 8 are formed in a cylindrical shape and are attached to the outer peripheral portions (attachment portions 5A and 6A) of the support shafts 5 and 6. The plate cylinder sleeve 7 and the impression cylinder sleeve 8 are held by the support shafts 5 and 6 and rotate integrally with the support shafts 5 and 6.

The plate cylinder sleeve 7 and the impression cylinder sleeve 8 can be attached to both the pair of support shafts 5 and 6, respectively. Therefore, the mounting portion 5A of the first support shaft 5 and the mounting portion 6A of the second support shaft 6 are formed in the same shape. Plate cylinder sleeve 7 and the impression cylinder sleeve 8, as well as removably attached to the different support shaft 5,6 together, it is possible to change the supporting shaft 5, 6 is mounted. The plate cylinder sleeve 7 is attached to one of the pair of support shafts 5 and 6, and the plate cylinder sleeve 7 and one support shaft become the plate cylinder 3. Further, the impression cylinder sleeve 8 is attached to the other of the pair of support shafts 5 and 6, and the impression cylinder sleeve 8 and the other support shaft become the impression cylinder 4.

In the printing apparatus 1, the positions of the plate cylinder 3 and the impression cylinder 4 with respect to the web 2 are exchanged, and the back surface printing of the web 2 (printing on one surface (back surface 2A)) and the front surface printing of the web 2 (the other surface ( Printing on front side 2B). At that time, front side printing and back side printing can be switched without changing the moving direction F of the web 2. Further, the front surface printing and the back surface printing can be switched without changing the rotation directions of the pair of support shafts 5 and 6. When the positions of the plate cylinder 3 and the impression cylinder 4 are exchanged, the plate cylinder sleeve 7 and the impression cylinder sleeve 8 are exchanged corresponding to the positions of the plate cylinder 3 and the impression cylinder 4.

When printing the back surface of the web 2 (see FIGS. 3, 4, and 5 ), the plate cylinder sleeve 7 is attached to the first support shaft 5, and the impression cylinder sleeve 8 is attached to the second support shaft 6. The plate cylinder sleeve 7 and the plate cylinder 3 are located below the web 2 (on the back surface 2A side) and are arranged along the back surface 2A of the web 2. The impression cylinder sleeve 8 and the impression cylinder 4 are located on the upper side (front surface 2B side) of the web 2 and arranged along the front surface 2B of the web 2. The printing apparatus 1 prints an image on the back surface 2A of the web 2 that moves between the plate cylinder 3 (plate cylinder sleeve 7) and the impression cylinder 4 (impression sleeve 8).

FIG. 6 is a schematic view showing the structure of the printing apparatus 1 when the front surface of the web 2 is printed, and like FIG. 3, each part of the printing apparatus 1 is shown in combination in one drawing. 7 and 8 are schematic diagrams showing the printing device 1 at the time of printing the front surface of the web 2, and a part of the printing device 1 taken along line X2-X2 in FIG. 6 is simplified and shown. 7 shows the printing apparatus 1 before the auxiliary frame 30 is attached to the main body frame 20, and FIG. 8 shows the printing apparatus 1 after the auxiliary frame 30 is attached to the main body frame 20.

As shown in the drawing, when printing the surface of the web 2, the impression cylinder sleeve 8 is attached to the first support shaft 5, and the plate cylinder sleeve 7 is attached to the second support shaft 6. The impression cylinder sleeve 8 and the impression cylinder 4 are located below the web 2 (on the back surface 2A side) and are arranged along the back surface 2A of the web 2. The plate cylinder sleeve 7 and the plate cylinder 3 are located on the upper side (the surface 2B side) of the web 2 and arranged along the surface 2B of the web 2. The printing apparatus 1 prints an image on the surface 2B of the web 2 moving between the plate cylinder 3 and the impression cylinder 4.

When the plate cylinder sleeve 7 and the impression cylinder sleeve 8 are replaced, the plate cylinder sleeve 7 and the impression cylinder sleeve 8 are arranged on one side in the axial direction of the support shafts 5 and 6 (on the one end portions 5B and 6B sides of the support shafts 5 and 6). ), and remove from each support shaft 5, 6. Subsequently, the support shafts 5 and 6 to which the plate cylinder sleeve 7 and the impression cylinder sleeve 8 are attached are changed, and the plate cylinder sleeve 7 and the impression cylinder sleeve 8 attached to the pair of support shafts 5 and 6 are exchanged. By exchanging the plate cylinder sleeve 7 and the impression cylinder sleeve 8, the positions of the plate cylinder 3 and the impression cylinder 4 with respect to the web 2 are exchanged. At that time, the plate cylinder sleeve 7 and the impression cylinder sleeve 8 are moved to the other side in the axial direction of the respective support shafts 5, 6 (the other end portions 5C, 6C side of the respective support shafts 5, 6) to support the support shafts 5, 6 is inserted into the plate cylinder sleeve 7 and the impression cylinder sleeve 8. The plate cylinder sleeve 7 and the impression cylinder sleeve 8 are fitted to the changed support shafts 5 and 6, respectively, and are fixed to different support shafts 5 and 6 by fixing members 5D and 6D.

FIG. 9 is a view showing a part of FIG. 3 including the plate cylinder 3 and the impression cylinder 4 and the rotating device 10.
As illustrated, the rotating device 10 has a motor 11 and a transmission mechanism 12, and is attached to the main body frame 20. The transmission mechanism 12 includes a first transmission gear 13 fixed to the output shaft of the motor 11, a second transmission gear 14 that meshes with the first transmission gear 13, and a third transmission gear 15. The third transmission gear 15 is arranged concentrically with the second transmission gear 14, and rotates integrally with the second transmission gear 14. The rotating device 10 rotates the transmission gears 13, 14, 15 of the transmission mechanism 12 by the motor 11.

The printing apparatus 1 includes interlocking gears 16 and 17 that rotate the pair of support shafts 5 and 6 in an interlocking manner. The interlocking gears 16 and 17 are fixed to the other end portions 5C and 6C of the pair of support shafts 5 and 6 and rotate integrally with the support shafts 5 and 6. The third transmission gear 15 of the transmission mechanism 12 meshes with the interlocking gear 17 of the second support shaft 6, and the interlocking gear 17 of the second support shaft 6 meshes with the interlocking gear 16 of the first support shaft 5. The rotation device 10 transmits the rotation of the motor 11 to the interlocking gear 17 of the second support shaft 6 by the third transmission gear 15, and the interlocking gears 16 and 17, the second support shaft 6, and the first support shaft 5 To rotate. As a result, the plate cylinder 3 and the impression cylinder 4 rotate together in the main body frame 20.

The main body frame 20 is a base frame of the printing apparatus 1 and rotatably supports the second support shaft 6 (see FIGS. 3 and 6). The main body frame 20 includes a pair of frame portions 21 and 22 (first frame portion 21 and second frame portion 22) facing each other, and two exchange ports 23 and 24 (first frame portion 21 and second exchange portion 22) formed in the first frame portion 21. It has a first exchange port 23, a second exchange port 24), and a housing 25 arranged in the second exchange port 24. The pair of frame portions 21 and 22 are arranged apart from each other in the axial direction of the support shafts 5 and 6. The plate cylinder sleeve 7 and the impression cylinder sleeve 8 are arranged between the pair of frame portions 21 and 22.

The exchange ports 23 and 24 are openings for exchange of the plate cylinder sleeve 7 and the impression cylinder sleeve 8, and are formed in the first frame portion 21 corresponding to the positions of the pair of support shafts 5 and 6. The size of the exchange ports 23, 24 is larger than the diameters of the plate cylinder sleeve 7 and the impression cylinder sleeve 8, and the plate cylinder sleeve 7 and the impression cylinder sleeve 8 pass through the exchange ports 23, 24. The housing 25 is arranged in the second exchange port 24 of the first frame portion 21 and is detachably attached to the second exchange port 24. At that time, the housing 25 is inserted into the second exchange port 24 from the outside of the main body frame 20 and attached to the second exchange port 24. By attaching the housing 25 to the second exchange port 24, the second exchange port 24 is closed. Further, the housing 25 is extracted from the second exchange port 24 to the outside of the main body frame 20, and is removed from the second exchange port 24. The second exchange port 24 is opened by removing the housing 25 from the second exchange port 24.

The second support shaft 6 has a first support portion 6E located on the one end portion 6B side and a second support portion 6F located on the other end portion 6C side. The housing 25 is a support member that supports the first support portion 6E of the second support shaft 6, and is connected to the first support portion 6E of the second support shaft 6 when attached to the second replacement port 24. .. The main body frame 20 rotatably supports the first support portion 6E of the second support shaft 6 by the housing 25 of the first frame portion 21, and the second support portion 6F of the second support shaft 6 by the second frame portion 22. Support rotatably.

When the housing 25 is removed from the second exchange port 24, the support of the first support portion 6E of the second support shaft 6 is released, and the second support shaft 6 is supported only by the second support portion 6F. In this state, the impression cylinder sleeve 8 or the plate cylinder sleeve 7 can be extracted from the main body frame 20 through the second exchange port 24, and the impression cylinder sleeve 8 or the plate cylinder sleeve 7 can be removed from the second support shaft 6. be able to. Further, the plate cylinder sleeve 7 or the impression cylinder sleeve 8 can be inserted into the main body frame 20 through the second exchange port 24, and the plate cylinder sleeve 7 or the impression cylinder sleeve 8 can be attached to the second support shaft 6. it can. As a result, in the second support shaft 6, the impression cylinder sleeve 8 is replaced with the plate cylinder sleeve 7, or the plate cylinder sleeve 7 is replaced with the impression cylinder sleeve 8.

The body frame 20 has two openings 26, 27 (first opening 26, second opening 27) provided between the pair of frame portions 21, 22 (see FIG. 3) (FIG. 4, FIG. 5, FIG. 7 and FIG. 8). The two openings 26 and 27 are mounting openings for mounting the auxiliary frame 30 and the ink supply device 40, and are formed on the side surface of the main body frame 20. Further, the two openings 26 and 27 are provided on the respective sides of the pair of support shafts 5 and 6 with respect to the web 2 and face each other with the web 2 interposed therebetween. Here, the 1st opening part 26 is a lower opening part located in the lower side of the web 2 (1st support shaft 5 side), and the 2nd opening part 27 is the upper side of the web 2 (2nd support shaft 6 side). ) Is the upper opening.

The auxiliary frame 30 is a cassette that can be attached to each of the two openings 26 and 27, and assists the attachment of the ink supply device 40 to each of the openings 26 and 27. The printing device 1 includes a guide member 28 that can be attached to each of the two openings 26 and 27. The auxiliary frame 30 and the guide member 28 are arranged in the openings 26 or 27 different from each other and are detachably attached to the openings 26 or 27. Guide member 28 is attached to the opening 26 or 27 prior to attachment to the opening 26 or 27 of the auxiliary frame 30, for guiding the auxiliary frame 30 attached to the opening 26 or 27.

The guide member 28 is attached to the opening 26 or 27 on the side of the support shaft 5 or 6 to which the impression cylinder sleeve 8 is attached. The guide member 28 is formed in a block shape and closes at least a part of each opening 26 or 27. The auxiliary frame 30 is attached to the opening 26 or 27 on the side of the support shaft 5 or 6 to which the plate cylinder sleeve 7 is attached. At this time, the auxiliary frame 30 is inserted into the opening 26 or 27 while being guided by the guide member 28, and is arranged in the opening 26 or 27.

The guide member 28 is attached to the opening 26 or 27 on the impression cylinder 4 side, and the auxiliary frame 30 is attached to the opening 26 or 27 on the plate cylinder 3 side. Therefore, when printing the back surface of the web 2 (see FIGS. 4 and 5 ), the guide member 28 is attached to the second opening 27 on the second support shaft 6 side to which the impression cylinder sleeve 8 is attached. The auxiliary frame 30 is attached to the first opening 26 on the side of the first support shaft 5 to which the plate cylinder sleeve 7 is attached. On the other hand, when the front surface of the web 2 is printed (see FIGS. 7 and 8), the guide member 28 is attached to the first opening 26 on the first support shaft 5 side to which the impression cylinder sleeve 8 is attached. The auxiliary frame 30 is attached to the second opening 27 on the side of the second support shaft 6 to which the plate cylinder sleeve 7 is attached.

The ink supply device 40 is a cassette-type movable ink unit, and is fixed to an auxiliary frame 30 different from the main body frame 20. Further, the ink supply device 40 has a rotatable anilox roll 41 and an ink doctor chamber device 42 for supplying ink to the anilox roll 41. With the exchange of the positions of the plate cylinder 3 and the impression cylinder 4, the ink supply device 40 moves in accordance with the position of the plate cylinder sleeve 7 attached to the support shaft 5 or 6, and the opening 26 or 27 of the main body frame 20. Attached to. The anilox roll 41 contacts the plate cylinder sleeve 7 of the plate cylinder 3 and rotates around the rotation center 43 in association with the rotation of the plate cylinder 3. The ink supply device 40 supplies ink to the plate cylinder sleeve 7 by the anilox roll 41.

The auxiliary frame 30 and the ink supply device 40 move integrally with each of the two openings 26, 27 of the main body frame 20 and are attached to the destination opening 26 or 27. Further, as the positions of the plate cylinder 3 and the impression cylinder 4 are exchanged, the auxiliary frame 30 moves integrally with the ink supply device 40 in accordance with the position of the plate cylinder sleeve 7 attached to the support shaft 5 or 6. It is attached to the opening 26 or 27 on the side of the support shaft 5 or 6 to which the body sleeve 7 is attached. The ink supply device 40 is attached to the opening 26 or 27 on the plate cylinder 3 side via the auxiliary frame 30. With the auxiliary frame 30 attached to the opening 26 or 27, the anilox roll 41 contacts the plate cylinder sleeve 7, and the ink supply device 40 supplies ink to the plate cylinder sleeve 7.

The printing device 1 (see FIGS. 3 and 6) includes a drive gear 18 fixed to the plate cylinder 3, a driven gear 19 fixed to an anilox roll 41, and a moving device 44 for moving the anilox roll 41. .. The drive gear 18 is attached to the end of the plate cylinder sleeve 7 on the second frame 22 side. When the plate cylinder sleeve 7 and the impression cylinder sleeve 8 are exchanged , the drive gear 18 moves integrally with the plate cylinder sleeve 7 so that the drive gear 18 is fitted on the support shaft 5 or 6 . The driven gear 19 is attached to the end portion of the anilox roll 41 on the second frame portion 22 side and meshes with the drive gear 18. The drive gear 18 rotates with the plate cylinder sleeve 7 to rotate the driven gear 19 and the anilox roll 41.

The moving device 44 includes a pair of moving mechanisms 45A and 45B (first moving mechanism 45A, second moving) provided on the pair of frame members 31 and 32 (first frame member 31 and second frame member 32) of the auxiliary frame 30. Mechanism 45B). The pair of frame members 31 and 32 are arranged on both sides of the ink supply device 40 in the axial direction of the anilox roll 41 and attached to the ink supply device 40. The first frame member 31 is attached to the first frame portion 21 of the main body frame 20, and the second frame member 32 is attached to the second frame portion 22 of the main body frame 20.

A pair of moving mechanisms 45A, 45B are different from each other end (the one end portion of the first frame member 31 side, the other end of the second frame member 32 side) of the A two Rocks rolls 41 are connected to each anilox roll Move the end of 41. Each of the moving mechanisms 45A and 45B includes a movable member 46 that rotatably supports the end of the anilox roll 41, a drive unit 47 that moves the movable member 46, and a position adjusting unit that adjusts the position of the end of the anilox roll 41. Have 48. In each of the pair of moving mechanisms 45A and 45B, the movable member 46 is arranged along the frame member 31 or 32 of the auxiliary frame 30 and extends from the end of the anilox roll 41 to the drive unit 47. The movable member 46 is movably connected to the frame member 31 or 32, and moves together with the end portion of the anilox roll 41 in a direction toward the plate cylinder sleeve 7 or a direction away from the plate cylinder sleeve 7.

The drive unit 47 is a piston/cylinder mechanism, and is connected to the frame member 31 or 32 and the movable member 46. The drive unit 47 moves the movable member 46 to move the end of the anilox roll 41 in the direction toward the plate cylinder sleeve 7 or in the direction away from the plate cylinder sleeve 7. The moving device 44 moves the both ends of the anilox roll 41 away from the plate cylinder sleeve 7 by the pair of moving mechanisms 45A and 45B to separate the anilox roll 41 from the plate cylinder sleeve 7. The moving device 44 moves the both ends of the anilox roll 41 toward the plate cylinder sleeve 7 by the pair of moving mechanisms 45A and 45B to bring the anilox roll 41 into contact with the plate cylinder sleeve 7.

The anilox roll 41 is pressed against the plate cylinder sleeve 7 by the pair of moving mechanisms 45A and 45B of the moving device 44. In this state, the position adjusting portions 48 of the pair of moving mechanisms 45A and 45B respectively move both ends of the anilox roll 41 to adjust the positions of both ends of the anilox roll 41. The position adjusting unit 48 has an adjusting screw 48A that penetrates the screw hole of the movable member 46 and a handle 48B that rotates the adjusting screw 48A. The adjusting screw 48A projects from the movable member 46, and the tip end of the adjusting screw 48A is pressed toward the frame member 31 or 32. By rotating the adjusting screw 48A with the handle 48B, the protruding length of the adjusting screw 48A changes. At the same time, the movable member 46 moves along the adjusting screw 48A, and the position of the movable member 46 with respect to the frame member 31 or 32 changes. As a result, the ends of the movable member 46 and the anilox roll 41 move in the direction approaching the plate cylinder sleeve 7 or in the direction separating from the plate cylinder sleeve 7.

The position adjusting portions 48 of the pair of moving mechanisms 45A and 45B adjust the positions of both ends of the anilox roll 41 and the contact pressure between the plate cylinder 3 (plate cylinder sleeve 7) and the anilox roll 41. Therefore, the position adjusting unit 48 is also a contact pressure adjusting unit. When the position adjusting section 48 moves the anilox roll 41 in the direction away from the plate cylinder sleeve 7, the contact pressure between the plate cylinder 3 and the anilox roll 41 becomes low. Further, when the position adjusting unit 48 moves the anilox roll 41 in the direction of approaching the plate cylinder sleeve 7, the contact pressure between the plate cylinder 3 and the anilox roll 41 increases. While the contact pressure between the plate cylinder 3 and the anilox roll 41 is adjusted, the driven gear 19 of the anilox roll 41 meshes with the drive gear 18 of the plate cylinder 3 with proper backlash.

The rotating body 50 holds one of the pair of support shafts and rotates together with the one support shaft. In the printing apparatus 1 of the present embodiment, one support shaft is the first support shaft 5 and the other support shaft is the second support shaft 6. Therefore, the rotating body 50 holds the first support shaft 5 and rotates together with the first support shaft 5. On the other hand, the second support shaft 6 is held by the main body frame 20, and the position of the second support shaft 6 is fixed in the printing apparatus 1. The first support shaft 5 moves by rotation while being parallel to the second support shaft 6. Further, the first support shaft 5 is rotatably supported by the rotating body 50, and rotates integrally with the rotating body 50 around the rotation center 51 of the rotating body 50. The first support shaft 5 moves in a direction toward the second support shaft 6 or a direction away from the second support shaft 6 as the rotary body 50 rotates.

The rotating body 50 includes a pair of rotating portions 52 and 53 (a first rotating portion 52 and a second rotating portion 53) and a connection that rotatably connects the pair of rotating portions 52 and 53 to the main body frame 20. The parts 54, 55 (first connecting part 54, second connecting part 55), one exchange port (third exchange port 56) formed in the first rotating part 52, and the third exchange port 56 are arranged. A housing 57. The pair of rotating portions 52 and 53 are located outside the main body frame 20, and are arranged along the frame portions 21 and 22 of the main body frame 20, respectively. The rotating parts 52 and 53 are, for example, rotating arms formed in an arm shape, and are connected to the frame parts 21 and 22 by connecting parts 54 and 55. The rotation center 51 (see FIG. 3) of the rotating body 50 is located at the center of the connecting portions 54 and 55 and on a straight line parallel to the axial direction of the first support shaft 5.

The third replacement port 56 is an opening for replacement of the plate cylinder sleeve 7 and the impression cylinder sleeve 8, and is formed in the first rotating portion 52 corresponding to the position of the first support shaft 5. The size of the third exchange port 56 is larger than the diameters of the plate cylinder sleeve 7 and the impression cylinder sleeve 8, and the plate cylinder sleeve 7 and the impression cylinder sleeve 8 pass through the third exchange port 56. The housing 57 is arranged in the third exchange port 56 of the first rotating portion 52, and is detachably attached to the third exchange port 56. At that time, the housing 57 is inserted into the third exchange port 56 from the outside of the rotating body 50 and attached to the third exchange port 56. By attaching the housing 57 to the third exchange port 56, the third exchange port 56 is closed. Further, the housing 57 is extracted from the third exchange port 56 to the outside of the rotating body 50, and is removed from the third exchange port 56. The third exchange port 56 is opened by removing the housing 57 from the third exchange port 56.

The first support shaft 5 has a first support portion 5E located on the one end portion 5B side and a second support portion 5F located on the other end portion 5C side. The housing 57 is a support member that supports the first support portion 5E of the first support shaft 5, and is connected to the first support portion 5E of the first support shaft 5 when attached to the third exchange port 56. .. The rotating body 50 rotatably supports the first supporting portion 5E of the first supporting shaft 5 by the housing 57 of the first rotating portion 52, and the second supporting portion 5F of the first supporting shaft 5 as the second rotating portion. It is rotatably supported by 53.

The third exchange port 56 of the rotating body 50 is arranged in alignment with the first exchange port 23 of the main body frame 20. When the housing 57 is removed from the third exchange port 56, the support of the first support portion 5E of the first support shaft 5 is released, and the first support shaft 5 is supported only by the second support portion 5F. In this state, the plate cylinder sleeve 7 or the impression cylinder sleeve 8 can be extracted from the main body frame 20 through the first exchange port 23 and the third exchange port 56, and the plate cylinder sleeve 7 or the impression cylinder sleeve 8 can be removed from the main frame 20. 1 can be removed from the support shaft 5. Further, it is possible to insert the impression cylinder sleeve 8 or the plate cylinder sleeve 7 into the main body frame 20 through the third exchange port 56 and the first exchange port 23, and the impression cylinder sleeve 8 or the plate cylinder sleeve 7 is first supported. It can be attached to the shaft 5. As a result, in the first support shaft 5, the plate cylinder sleeve 7 is replaced with the impression cylinder sleeve 8, or the impression cylinder sleeve 8 is replaced with the plate cylinder sleeve 7.

When printing the back surface of the web 2 (see FIGS. 3 and 5 ), the plate cylinder sleeve 7 is attached to the first support shaft 5. Therefore, the rotating body 50 holds the plate cylinder 3 and rotates together with the plate cylinder 3. Further, when the ink supply device 40 moves in accordance with the position of the plate cylinder sleeve 7 attached to the first support shaft 5 (one support shaft), the rotation center 43 of the anilox roll 41 rotates the rotation body 50. It coincides with the center 51. In this state, the driven gear 19 of the anilox roll 41 meshes with the drive gear 18 of the plate cylinder 3 with proper backlash. Further, the anilox roll 41 contacts the plate cylinder sleeve 7 of the plate cylinder 3 with an appropriate contact pressure. That is, the rotation center 43 of the anilox roll 41 coincides with the rotation center 51 of the rotating body 50 in a state where the anilox roll 41 of the ink supply device 40 is arranged at a position for supplying ink to the plate cylinder sleeve 7.

The rotation center 51 of the rotating body 50 is located outside the outer peripheral surface of the plate cylinder sleeve 7 in the radial direction of the plate cylinder sleeve 7. The rotation center 43 of the anilox roll 41 and the rotation center 51 of the rotating body 50 are located on the same straight line parallel to the axial direction of the first support shaft 5. In this state, the rotating body 50 is rotated by the rotating device 60 to move the first support shaft 5 and the plate cylinder 3 in the rotating direction. The rotating device 60 simultaneously rotates the pair of rotating portions 52 and 53 of the rotating body 50 to rotate the pair of rotating portions 52 and 53 integrally with the first support shaft 5.

FIG. 10 is a schematic view showing a state in which the rotating body 50 shown in FIG. 5 is rotated. FIG. 11 is a cross-sectional view of the rotating body 50 and the rotating device 60 attached to the main body frame 20.
As shown in FIG. 5, FIG. 10, and FIG. 11, the turning device 60 includes a pair of turning mechanisms 61A and 61B (first turning mechanism 61A, which is provided on the pair of frame portions 21 and 22 of the main body frame 20). It has a second rotation mechanism 61B). The first rotating mechanism 61A rotates the first rotating portion 52 of the rotating body 50, and the second rotating mechanism 61B rotates the second rotating portion 53 of the rotating body 50.

Each rotation mechanism 61A, 61B has a control member 62 for controlling the rotation of the rotation portions 52, 53, and a drive portion 63 for driving the control member 62. The drive portion 63 is a piston/cylinder mechanism, and is connected to the frame portion 21 or 22 and the control member 62. The control member 62 includes a shaft member 64 rotatably supported by the frame portion 21 or 22, a lever 65 fixed to one end of the shaft member 64, and a rotating member 66 fixed to the other end of the shaft member 64. Have. The drive unit 63 and the lever 65 are arranged inside the main body frame 20, and the rotating member 66 is arranged outside the main body frame 20.

The drive unit 63 is rotatably connected to the lever 65, and rotates the lever 65 around the rotation center 64A of the shaft member 64 (see FIG. 11). The lever 65 is a rotating arm formed in an arm shape, and rotates the shaft member 64 and the rotating member 66 with the rotation. The rotating member 66 is a cylindrical member that incorporates a cylindrical roller bearing, and rotates about the radial center of the rotating member 66 (rotation center 66A). The rotation center 66A of the rotating member 66 is eccentric with respect to the rotation center 64A of the shaft member 64. With the outer peripheral portion of the rotating member 66 in contact with the contact surfaces 52A and 53A of the rotating portions 52 and 53, the rotating member 66 rotates integrally with the shaft member 64 while rotating around the rotation center 66A. The contact surfaces 52A and 53A of the rotating portions 52 and 53 are part of the lower edges of the rotating portions 52 and 53.

The rotating member 66 is located below the contact surfaces 52A and 53A of the rotating portions 52 and 53, and supports the rotating portions 52 and 53 at the contact surfaces 52A and 53A. Further, in a state where the rotation center 66A of the rotation member 66 is eccentric with respect to the rotation center 64A of the shaft member 64, the rotation member 66 contacting the contact surface 52A or 53A rotates about the rotation center 66A of the rotation member 66. While rotating, it rotates around the rotation center 64A of the shaft member 64. The rotation center 66A of the rotating member 66 moves around the rotation center 64A of the shaft member 64 as the shaft member 64 rotates. At the same time, the portions of the rotating member 66 that contact the contact surfaces 52A and 53A change in the circumferential direction of the rotating member 66. As a result, the positions of the contact surfaces 52A and 53A of the rotating portions 52 and 53 change, and the rotating portions 52 and 53 rotate. The rotating mechanisms 61A and 61B rotate the control member 62 including the rotating member 66 by the drive unit 63, and rotate the rotating units 52 and 53 by the control member 62. The eccentric rotation of the rotating member 66 about the rotation center 64A of the shaft member 64 moves the positions of the contact surfaces 52A and 53A that come into contact with the rotating member 66. At this time, since the rotating member 66 rotates around the rotation center 66A, wear of the contact surfaces 52A and 53A due to friction is suppressed.

The rotating device 60 rotates the pair of rotating portions 52 and 53 and the rotating body 50 together with the first support shaft 5 by the pair of rotating mechanisms 61A and 61B. Further, the turning device 60 moves the first support shaft 5 by turning the turning body 50 in a state where the pair of support shafts 5 and 6 are parallel to each other in the axial direction. As a result, the first support shaft 5 moves in a direction toward the second support shaft 6 or a direction away from the second support shaft 6. As the first support shaft 5 moves, the plate cylinder 3 moves with respect to the impression cylinder 4. Specifically, the first support shaft 5 moves in a direction away from the second support shaft 6, and the plate cylinder 3 (plate cylinder sleeve 7) separates from the impression cylinder 4 (impression cylinder sleeve 8) (see FIG. 10). Alternatively, the first support shaft 5 moves in a direction approaching the second support shaft 6, and the plate cylinder 3 contacts the impression cylinder 4 (see FIG. 5 ).

The contact surfaces 52A and 53A of the rotating portions 52 and 53 are the contact surfaces of the rotating body 50 that comes into contact with the rotating device 60, and are on one side (here, in the moving direction F of the web 2 with respect to the first support shaft 5). , Downstream). On the other hand, the rotation center 51 and the connecting portions 54 and 55 of the rotating body 50 are located on the other side (here, upstream side) in the moving direction F of the web 2 with respect to the first support shaft 5. The rotating device 60 contacts the contact surface of the rotating body 50 by the control member 62 to rotate the rotating body 50. The plate cylinder 3 moves in a direction approaching the impression cylinder 4 or a direction away from the impression cylinder 4 as the rotary body 50 rotates.

The plate cylinder sleeve 7 of the plate cylinder 3 is pressed against the impression cylinder sleeve 8 of the impression cylinder 4 by the rotation of the rotating body 50 (see FIGS. 5 and 11 ). In this state, the printing pressure adjusting mechanism 70 adjusts the printing pressure applied to the web 2 passing between the plate cylinder 3 and the impression cylinder 4. The printing pressure adjustment mechanism 70 includes a displacement member 71 that displaces the rotating body 50 around the rotation center 51, and an operation mechanism 80 that operates the displacement member 71. The displacement member 71 projects from the shaft portion 72, the two eccentric portions 73 and 74 (first eccentric portion 73, second eccentric portion 74) provided at both ends of the shaft portion 72, and the first eccentric portion 73. It has a protrusion 75.

The shaft portion 72 is stretched over the pair of frame portions 21 and 22 of the main body frame 20 and is rotatably supported by the pair of frame portions 21 and 22. The eccentric portions 73 and 74, the protruding portion 75, and the operating mechanism 80 are arranged outside the main body frame 20. The protruding portion 75 protrudes from the first eccentric portion 73 toward the opposite side of the shaft portion 72, and is formed concentrically with the shaft portion 72. The operation mechanism 80 is attached to the first frame portion 21 of the main body frame 20, and is connected to the protruding portion 75 of the displacement member 71.

FIG. 12 is a diagram showing the printing pressure adjustment mechanism 70 as seen from the direction of arrow X3 in FIG.
As illustrated, the operating mechanism 80 of the printing pressure adjusting mechanism 70 is fixed to the bracket 81 attached to the first frame portion 21, the operating shaft 82 rotatably supported by the bracket 81, and the operating shaft 82. It has a worm 83, a worm wheel 84 fixed to the projecting portion 75 of the displacement member 71, and a handle 85 attached to the operation shaft 82. The worm 83 and the worm wheel 84 mesh with each other. By rotating the handle 85, the operation shaft 82 and the worm 83 rotate. The worm wheel 84 rotates integrally with the displacement member 71 as the worm 83 rotates.

The operation mechanism 80 (see FIGS. 11 and 12) operates the rotation of the displacement member 71 to rotate the displacement member 71 around the rotation center 72A of the shaft 72. The eccentric portions 73 and 74 are circular cam portions, and the radial centers 73A and 74A of the eccentric portions 73 and 74 are eccentric with respect to the rotation center 72A of the shaft portion 72. The distance between the centers 73A and 74A of the eccentric portions 73 and 74 and the rotation center 72A of the shaft portion 72 is the amount of eccentricity of the eccentric portions 73 and 74 with respect to the shaft portion 72. The eccentric amounts of the two eccentric portions 73 and 74 are equal. With the outer peripheral portions of the eccentric portions 73 and 74 in contact with the receiving portions 52B and 53B of the rotating portions 52 and 53 (see FIGS. 5 and 11), the eccentric portions 73 and 74 of the displacement member 71 are operated by the operating mechanism 80. Rotate. The receiving portions 52B and 53B of the rotating portions 52 and 53 are part of the upper edge portions of the rotating portions 52 and 53, and are located above the contact surfaces 52A and 53A of the rotating portions 52 and 53. There is. The receiving portions 52B and 53B are located below the eccentric portions 73 and 74 and receive the eccentric portions 73 and 74.

The receiving portions 52B and 53B of the rotating portions 52 and 53 are pressed against the eccentric portions 73 and 74 of the displacement member 71 by the rotating device 60. In that state, the eccentric portions 73 and 74 rotate around the rotation center 72A of the shaft portion 72 while being eccentric with respect to the shaft portion 72 by the rotation operation of the operation mechanism 80. With the eccentric rotation of the eccentric portions 73 and 74, the centers 73A and 74A of the eccentric portions 73 and 74 move around the rotation center 72A of the shaft portion 72. At the same time, the portions of the eccentric portions 73, 74 that contact the receiving portions 52B, 53B change in the circumferential direction of the eccentric portions 73, 74. As a result, the positions of the receiving portions 52B and 53B of the rotating portions 52 and 53 change, and the rotating portions 52 and 53 and the rotating body 50 rotate. The displacement member 71 displaces the rotating body 50 and the rotating portions 52 and 53 in the rotating direction by the eccentric portions 73 and 74.

In a state where the pair of support shafts 5 and 6 are parallel to each other in axial direction, the printing pressure adjustment mechanism 70 causes the displacement member 71 to displace the rotating body 50 together with the first support shaft 5. As a result, the first support shaft 5 is displaced in a direction toward the second support shaft 6 or a direction away from the second support shaft 6. With the displacement of the first support shaft 5, the plate cylinder 3 is displaced with respect to the impression cylinder 4. The printing pressure adjusting mechanism 70 displaces the plate cylinder 3 in a direction approaching the impression cylinder 4 or away from the impression cylinder 4 by the displacement of the rotating body 50 and the first support shaft 5 to apply the printing pressure to the web 2. adjust. Specifically, when the plate cylinder 3 is displaced in the direction away from the impression cylinder 4 by the printing pressure adjusting mechanism 70, the printing pressure on the web 2 becomes low. Further, when the printing cylinder 3 is displaced by the printing pressure adjusting mechanism 70 in the direction of approaching the impression cylinder 4, the printing pressure on the web 2 increases. The web 2 passes between the plate cylinder 3 and the impression cylinder 4 in a state where the printing pressure on the web 2 is adjusted.

When printing the back surface of the web 2 (see FIGS. 3, 4, and 5), the plate cylinder sleeve 7 is attached to the first support shaft 5, and the impression cylinder sleeve 8 is attached to the second support shaft 6. Further, the guide member 28 is attached to the second opening 27 of the main body frame 20. The ink supply device 40 and the auxiliary frame 30 are moved according to the position of the plate cylinder sleeve 7 and attached to the first opening 26 of the main body frame 20. In this state, the anilox roll 41 is brought into contact with the plate cylinder sleeve 7 by the moving device 44, and the contact pressure between the plate cylinder 3 and the anilox roll 41 is adjusted by the position adjusting section 48. As a result, the driven gear 19 of the anilox roll 41 meshes with the drive gear 18 of the plate cylinder 3 with proper backlash. Further, the anilox roll 41 is arranged at a position where ink is supplied to the plate cylinder sleeve 7.

The rotating body 50 and the plate cylinder 3 are rotated by the rotating device 60 to move the plate cylinder 3 with respect to the impression cylinder 4. Further, the rotary body 50 and the plate cylinder 3 are displaced by the printing pressure adjusting mechanism 70 to adjust the printing pressure on the web 2. When the rotating body 50 and the plate cylinder 3 rotate (displace), the rotation center 43 of the anilox roll 41 coincides with the rotation center 51 of the rotating body 50. Therefore, the plate cylinder 3 moves around the rotation center 43 of the anilox roll 41 without changing the distance between the rotation center of the plate cylinder 3 and the rotation center 43 of the anilox roll 41.

Therefore, even if the plate cylinder 3 is moved with respect to the impression cylinder 4, the contact pressure between the plate cylinder 3 and the anilox roll 41 does not change. Further, even if the printing pressure on the web 2 is adjusted, the contact pressure between the plate cylinder 3 and the anilox roll 41 does not change. That is, the printing pressure on the web 2 is adjusted while the contact pressure between the plate cylinder 3 and the anilox roll 41 is constant. The rotating body 50 is arranged outside the main body frame 20, and the anilox roll 41 is arranged inside the main body frame 20. As described above, the rotating body 50 and the anilox roll 41 are separately arranged in the printing apparatus 1. Therefore, the structure of the printing apparatus 1 does not become complicated, and the assembly of the printing apparatus 1 is easy. The anilox roll 41 is easily arranged so that the centers 43 and 51 coincide with each other.

When printing the surface of the web 2 (see FIGS. 6, 7, and 8 ), the impression cylinder sleeve 8 is attached to the first support shaft 5, and the plate cylinder sleeve 7 is attached to the second support shaft 6. The plate cylinder 3 is rotatably supported by the main body frame 20, and the impression cylinder 4 is rotatably supported by the rotating body 50. The rotating body 50 holds the impression cylinder 4 and rotates together with the impression cylinder 4. Further, the guide member 28 is attached to the first opening 26 of the main body frame 20. The ink supply device 40 and the auxiliary frame 30 are moved according to the position of the plate cylinder sleeve 7 and attached to the second opening 27 of the main body frame 20. In this state, the anilox roll 41 is brought into contact with the plate cylinder sleeve 7 by the moving device 44, and the contact pressure between the plate cylinder 3 and the anilox roll 41 is adjusted by the position adjusting section 48. Accordingly, the driven gear 19 of the anilox roll 41 meshes with the drive gear 18 of the plate cylinder 3 with proper backlash. Further, the anilox roll 41 is arranged at a position where ink is supplied to the plate cylinder sleeve 7.

The rotating body 50 is rotated by the rotating device 60 to move the first support shaft 5 and the impression cylinder 4 in the rotating direction. As the first support shaft 5 moves, the impression cylinder 4 moves with respect to the plate cylinder 3. The impression cylinder 4 moves in a direction approaching the plate cylinder 3 or away from the plate cylinder 3 with the rotation of the rotating body 50. Specifically, the first support shaft 5 moves in a direction away from the second support shaft 6, and the impression cylinder 4 (impression cylinder sleeve 8) separates from the plate cylinder 3 (plate cylinder sleeve 7). The first support shaft 5 moves in a direction approaching the second support shaft 6, and the impression cylinder 4 contacts the plate cylinder 3. The impression cylinder sleeve 8 of the impression cylinder 4 is pressed against the plate cylinder sleeve 7 of the plate cylinder 3 by the rotation of the rotating body 50.

The impression cylinder 4 is displaced with respect to the plate cylinder 3 by the printing pressure adjusting mechanism 70. The printing pressure adjusting mechanism 70 displaces the impression cylinder 4 in the direction approaching the plate cylinder 3 or away from the plate cylinder 3 by the displacement of the rotating body 50 and the first support shaft 5, thereby applying the printing pressure to the web 2. adjust. Specifically, when the impression cylinder 4 is displaced by the printing pressure adjusting mechanism 70 in the direction away from the plate cylinder 3, the printing pressure on the web 2 becomes low. Further, when the impression cylinder 4 is displaced by the printing pressure adjusting mechanism 70 in the direction of approaching the plate cylinder 3, the printing pressure on the web 2 increases.

The rotating body 50 and the impression cylinder 4 are rotated by the rotation device 60 to move the impression cylinder 4. Further, the rotary body 50 and the impression cylinder 4 are displaced by the printing pressure adjusting mechanism 70 to adjust the printing pressure on the web 2. When the rotating body 50 and the impression cylinder 4 are rotated (displaced), the positions of the plate cylinder 3 and the anilox roll 41 do not change. Therefore, even if the impression cylinder 4 is moved, the contact pressure between the plate cylinder 3 and the anilox roll 41 does not change. Further, even if the printing pressure on the web 2 is adjusted, the contact pressure between the plate cylinder 3 and the anilox roll 41 does not change. Therefore, the printing pressure on the web 2 is adjusted while the contact pressure between the plate cylinder 3 and the anilox roll 41 is constant.

As described above, according to the printing apparatus 1, with a simple mechanism, it is possible to adjust the printing pressure and move the plate cylinder 3 with respect to the impression cylinder 4 while preventing the contact pressure between the plate cylinder 3 and the anilox roll 41 from changing. It can be done easily. It is not necessary to adjust the contact pressure between the plate cylinder 3 and the anilox roll 41 when the printing pressure is adjusted or the plate cylinder 3 is moved with respect to the impression cylinder 4. It is also possible to prevent a change in the load applied from the anilox roll 41 to the plate cylinder 3. As a result, it is possible to suppress damage to the plate cylinder 3 (plate).

In the printing apparatus 1, the number of parts can be reduced and the structure of the printing apparatus 1 can be simplified. Therefore, the cost of the printing apparatus 1 can be reduced. Since the auxiliary frame 30 is attached to the openings 26 and 27 of the main body frame 20, the ink supply device 40 can be easily arranged according to the position of the plate cylinder sleeve 7. The auxiliary frame 30 can be smoothly attached to the openings 26 and 27 of the main body frame 20 by the guide of the guide member 28.

The rotating device 60 contacts the contact surface of the rotating body 50 and rotates the rotating body 50 around the rotation center 51. In the moving direction F of the web 2, the contact surface of the rotating body 50 is located on one side of the first support shaft 5, and the rotation center 51 of the rotating body 50 is located on the other side of the first support shaft 5. Therefore, the force required to rotate the rotating body 50 can be reduced, and the rotating body 50 can be easily rotated by the rotating device 60.

In the printing apparatus 1 of this embodiment, the back surface 2A of the web 2 is the lower surface of the web 2 and the front surface 2B of the web 2 is the upper surface of the web 2. On the other hand, the web 2 may be moved in the moving direction F with the back surface 2A and the front surface 2B of the web 2 reversed. In this case, the back surface 2A of the web 2 is the top surface of the web 2, and the front surface 2B of the web 2 is the bottom surface of the web 2. When the plate cylinder 3 is located under the web 2, printing is performed on the surface 2B of the web 2. Further, when the plate cylinder 3 is located above the web 2, printing is performed on the back surface 2A of the web 2.

The first support shaft 5 and the second support shaft 6 may be exchanged. In this case, the rotating body 50 holds the first support shaft 5 located above the web 2 and rotates the first support shaft 5. The second support shaft 6 is located below the web 2 and is held by the main body frame 20.

In the printing apparatus 1 of this embodiment, the moving direction F of the web 2 is the horizontal direction. On the other hand, the moving direction F of the web 2 may be another direction (for example, a vertical direction, an obliquely upward direction, an obliquely downward direction). The present invention can be applied to various printing devices in the same manner as described above regardless of the moving direction F of the web 2.

DESCRIPTION OF SYMBOLS 1... Printing device, 2... Web, 3... Plate cylinder, 4... Impression cylinder, 5... 1st support shaft, 6... 2nd support shaft, 7... Plate Cylinder sleeve, 8... impression cylinder sleeve, 10... rotating device, 11... motor, 12... transmission mechanism, 13... first transmission gear, 14... second transmission gear, 15 ...Third transmission gear, 16... interlocking gear, 17... interlocking gear, 18...driving gear, 19...driven gear, 20...main body frame, 21...first frame Part, 22... second frame part, 23... first replacement port, 24... second replacement port, 25... housing, 26... first opening part, 27... second Opening part, 28... Guide member, 30... Auxiliary frame, 31... First frame member, 32... Second frame member, 40... Ink supply device, 41... Anilox roll, 42... Ink doctor chamber device, 43... Rotation center, 44... Moving device, 45A... First moving mechanism, 45B... Second moving mechanism, 46... Movable member, 47... ..Drive unit, 48... Position adjusting unit, 50... Rotating body, 51... Rotation center, 52... First rotating unit, 53... Second rotating unit, 54. ..First connection part, 55... Second connection part, 56... Third exchange port, 57... Housing, 60... Rotating device, 61A... First rotating mechanism, 61B ...Second rotation mechanism, 62...Control member, 63...Drive unit, 64...Shaft member, 65...Lever, 66...Rotating member, 70...Printing pressure adjustment Mechanism: 71... Displacement member, 72... Shaft part, 73... First eccentric part, 74... Second eccentric part, 75... Projection part, 80... Operating mechanism, 81... ..Bracket, 82... Operation axis, 83... Worm, 84... Worm wheel, 85... Handle, F... Moving direction

Claims (4)

By exchanging the positions of the plate cylinder and the impression cylinder with respect to the web, a printing device capable of switching the front side printing of the web and the back side printing of the web,
A pair of support shafts facing each other across the web,
A plate cylinder sleeve and an impression cylinder sleeve that are detachably attached to the different support shafts and that can change the support shafts attached,
An ink supply device having an anilox roll and movable according to the position of the plate cylinder sleeve attached to the support shaft,
A rotating body which holds one of the pair of support shafts and rotates together with the one support shaft,
A printing device in which the rotation center of the anilox roll coincides with the rotation center of the rotating body when the ink supply device moves in accordance with the position of the plate cylinder sleeve attached to the one support shaft. The printing apparatus according to claim 1,
A body frame having two openings provided on each side of the pair of support shafts with respect to the web;
An auxiliary frame that moves integrally with the ink supply device according to the position of the plate cylinder sleeve and that is attached to the opening on the support shaft side to which the plate cylinder sleeve is attached;
Printer equipped with. The printing apparatus according to claim 2,
A printing apparatus including a guide member that is attached to the opening on the support shaft side to which the impression cylinder sleeve is attached and that guides the auxiliary frame. The printing apparatus according to any one of claims 1 to 3,
A rotating device that rotates the rotating body by contacting a contact surface of the rotating body,
The contact surface of the rotating body is located on one side in the moving direction of the web with respect to the one support shaft,
A printing device in which the center of rotation of the rotating body is located on the other side in the moving direction of the web with respect to the one support shaft.

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