JP2010253794A - Printing plate, printing machine and printing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily mount a printing plate to a printing machine. <P>SOLUTION: The printing plate 2 is constituted by forming a rectangular elastic material sheet to have a cylindrical shape and superposing and jointing both ends to each other. The end of the sheet positioned inside a jointed portion 8 is bent inwardly to form an engagement part 6. Plate parts 5 are provided in predetermined sections on the outer periphery of a plate body excluding the jointed portion 8. A plate fixing member fitting face 18 is formed by removing part of the outer peripheral cylindrical face of a plate cylinder part 12. A plate fixing member 24 arranged on the plate fixing member fitting face 18 pushes the jointed part 8 of the printing plate 2 outwardly from the radial inner side to expand the diameter. As a result, the printing plate 2 is fixed to the plate cylinder part 12. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a printing plate, a printing machine, and a printing method.

  As a printing machine, a printer in which a plate is mounted on the outer periphery of a plate cylinder fixed to the plate drive shaft is known.

  In the printing press as described above, a sheet-shaped plate may be wound around and mounted on a plate cylinder fixed to the plate drive shaft. In that case, it is difficult to mount the plate in the printing press, and it is difficult to accurately attach the plate to the plate cylinder.

  In order to avoid this, the plate cylinder may be fixed to the plate drive shaft after the sheet-like plate is wound and mounted on the plate cylinder removed from the plate drive shaft. In this case, since the plate cylinder has a considerable weight, it is difficult to remove and attach the plate cylinder to the plate drive shaft.

  An object of the present invention is to provide a printing plate and a printing machine that can solve the above-described problems and can easily attach a plate to the printing machine.

  The present invention provides the following means.

[1] Cylindrical material molding in which a rectangular elastic material sheet having a resin layer to be a plate part formed on one side is wound around an outer peripheral surface of a cylinder member and rounded, and both ends of the sheet are overlapped and joined in a cylindrical shape Process,
A plate engraving process for engraving a printing pattern on the plate,
A printing plate mounting process for mounting the produced cylindrical printing plate on a cylinder of a printing press;
A printing process in which a printing pattern is printed on a printing object by a printing machine;
A printing method comprising:

  [2] The printing method according to item 1, wherein a plate engraving step is performed after the cylindrical material forming step.

  [3] The printing method according to item 1 or 2, wherein the printing object is a can.

[4] Cylindrical material molding in which a rectangular elastic material sheet having a resin layer to be a plate part formed on one side is wound around an outer peripheral surface of a cylinder member and rounded, and both ends of the sheet are overlapped and joined in a cylindrical shape Process,
A plate engraving process for engraving a printing pattern on the plate,
A method for producing a printing plate, comprising:

  [5] The method for producing a printing plate as described in 4 above, wherein an engraving step is performed after the cylindrical material forming step.

[6] The end of one side of the elastic material sheet is bent to the opposite side of the surface on which the resin layer is formed to form an engaging portion,
6. The cylindrical material forming step according to item 4 or 5, wherein the elastic material sheet is wound around the outer peripheral surface of the cylinder and rolled while the engaging portion is engaged with an engaging groove formed on the outer peripheral surface of the cylinder member. Method for producing printing plates.

  [7] The method for producing a printing plate as described in any one of 4 to 6 above, wherein a non-plate portion that does not become a plate portion is removed from the resin layer of the elastic material sheet prior to the cylindrical material forming step.

  [8] The method for producing a printing plate as described in any one of [4] to [7] above, wherein at least the surface of the resin layer of the non-printing portion where the printing pattern is not formed is removed from the plate portion prior to the plate portion engraving step.

  [9] The method for producing a printing plate as described in any one of 4 to 8 above, wherein an ultraviolet curable resin is used as the resin layer to be the plate part.

  [10] Prior to the plate engraving step, the printing portion of the plate portion on which the printing pattern is formed is cured by irradiating with ultraviolet rays, and the water washing / drying step is performed in which the plate portion necessary for printing is left and washed and dried. A method for producing a printing plate as described in Item 9.

  [11] The plate part engraving step is the method for producing a printing plate as described in any one of 4 to 10 above, wherein a printing pattern is engraved using a laser engraving machine.

[12] A plate portion is provided on a part of the outer peripheral portion of the plate main body formed in a cylindrical shape by an elastic material, and an engaging portion is formed on the inner periphery of the plate main body so as to protrude inward and extend in the axial direction. In order to mount the printing plate, it is a device provided in a fixed manner on the plate drive shaft of the printing press,
A plate cylinder portion having a cylindrical plate mounting surface provided on the plate drive shaft in a fixed manner and mounted on the outer periphery from the front end side of the plate drive shaft;
On the outer periphery of the plate cylinder portion, there are provided a circumferential positioning groove into which the engaging portion of the printing plate is fitted from the front end side of the plate driving shaft, and an axial positioning stopper with which the end portion of the printing plate abuts. An apparatus for mounting a printing plate, wherein

[13] The circumferential positioning groove is formed such that the bottom thereof is on the rear side in the rotational direction from the opening,
The angle formed between the circumferential positioning groove and the cylindrical surface including the plate mounting surface is set to be smaller than the angle formed between the engaging portion of the printing plate and the cylindrical surface formed by the printing plate. 13. The apparatus for mounting a printing plate as described in 12 above.

  [14] On the outer periphery of the plate cylinder part, a part of the printing plate mounted on the plate cylinder part is pushed from the radially inner side to the radially outer side to expand the diameter of the part, thereby making the printing plate a plate cylinder part. 14. The plate mounting apparatus for printing according to 12 or 13 above, wherein a plate fixing member for tightly fixing to the mounting surface is provided.

  [15] The plate fixing member can move between a position immersed inside the cylindrical surface including the plate mounting surface of the plate cylinder portion and a position outside the recessed position, and can be fixed at an arbitrary position. 15. The apparatus for mounting a printing plate as described in 14 above, wherein

  [16] The plate fixing member according to the above item 14 or 15, wherein the plate fixing member is disposed at a position to push the non-plate portion on which the printing plate portion mounted on the plate cylinder is not formed from the radially inner side to the radially outer side. Printing plate mounting device.

[17] The printing plate is a sheet in which a rectangular elastic material sheet is formed in a cylindrical shape and both end portions are overlapped and joined to form a cylindrical plate body, and located inside the joining portion. The end portion of the plate is bent inward to form an engaging portion, and a plate portion is provided at a predetermined location on the outer peripheral surface of the plate main body excluding the joining portion,
The plate fixing member according to any one of the above items 14 to 16, wherein the plate fixing member is disposed at a position to push the overlapping portion where both end portions of the printing plate sheet mounted on the plate cylinder are overlapped from the radially inner side to the radially outer side. The printing plate mounting apparatus described.

  [18] A plate fixing member mounting surface positioned radially inward of the cylindrical surface including the plate mounting surface is formed by removing a portion of the cylindrical surface on the outer periphery of the plate cylinder portion. 18. The mounting of a printing plate as described in any one of 14 to 17 above, wherein the plate fixing member is fitted in a recess for the plate fixing member formed on the mounting surface so that the plate fixing member can move in the radial direction. apparatus.

[19] A wedge member having a wedge surface radially outward is fitted in a wedge member recess formed in a bottom of the recess of the plate fixing member mounting surface so that the wedge member can move in the axial direction.
The plate cylinder portion is provided with screw means for moving the wedge member in the axial direction and stopping it at an arbitrary position.
19. The apparatus for mounting a printing plate as described in 18 above, wherein a wedge surface that abuts against the wedge surface of the wedge member is formed radially inside the plate fixing member.

  [20] The plate fixing member is urged radially inward using a permanent magnet between the plate cylinder portion or the wedge member and the plate fixing device, so that the wedge surface of the plate fixing member becomes the wedge surface of the wedge member. 20. The apparatus for mounting a printing plate as described in 19 above, wherein an urging means for press contact is provided.

  [21] The plate fixing member is configured so that a part of the printing plate mounted on the plate cylinder portion is radially directed from the inside in the radial direction within the range of the inside of the cylindrical surface formed by the outer surface including the printing plate portion. 21. The apparatus for mounting a printing plate as described in any one of 18 to 20 above, wherein the diameter is increased by pushing outward.

  [22] An air chamber to which compressed air is supplied by the air supply means is formed inside the plate cylinder portion, and the outer diameter of the plate cylinder portion on the front end side becomes smaller toward the front end. Any one of 12 to 21 above, wherein an air outflow hole communicating with the air chamber is formed at a plurality of locations in the axial direction and the circumferential direction of the outer peripheral surface of the plate cylinder portion including the portion having a reduced diameter. The printing plate mounting apparatus described in 1.

  [23] A printing machine comprising the printing plate mounting device according to any one of items 12 to 22.

[24] A printing machine comprising the printing plate mounting device according to any one of 12 to 22,
An engraving machine comprising the same printing plate mounting device as the printing machine, and engraving a printing pattern on the plate portion of the mounted printing plate;
A printing system comprising:

[25] A plate body formed in a cylindrical shape by an elastic material;
An engaging portion that protrudes inwardly on the inner periphery of the plate body and extends in the axial direction;
A plate portion formed on the outer peripheral surface of the plate body;
A printing plate characterized by comprising:

[26] The plate body is configured by forming a rectangular elastic material sheet into a cylindrical shape and overlapping and joining both ends,
The engaging portion is formed by bending the end portion of the sheet located inside the joining portion inside,
26. The printing plate according to item 25, wherein the plate portion is provided at a predetermined location excluding a joint portion.

[27] The printing plate according to item 26, wherein a bending angle of the engaging portion is greater than 90 degrees.

  According to the above invention [1], a rectangular elastic material sheet having a resin layer to be a plate part formed on one side is wound around the outer peripheral surface of the cylinder member and rounded, and both ends of the sheet are overlapped to form a cylindrical shape. Compared with the case where the end surfaces of the sheets are butt-welded for joining, a cylindrical printing plate can be easily manufactured. In addition, since such a cylindrical printing plate is mounted on a cylinder of a printing press for printing, the printing plate can be easily attached to and removed from the printing press.

  In the present invention, the term “plate part” refers to a part where a plate has already been formed (a part which has been made) and a part for forming a plate which has not yet been formed (a plate making process). Used to include both of the previous part).

  According to the invention [2], since the plate portion engraving step is performed after the cylindrical material forming step, the printing pattern of the plate portion can be accurately formed at a predetermined position of the printing plate previously formed into a cylindrical shape. In particular, when a plurality of plate portions, for example, two plate portions, are formed for one printing plate, the positions of printing patterns on the plurality of plate portions can be determined by an engraving machine, so that the plate portions are formed on each plate portion. The relative alignment between printed patterns can be accurately performed.

  According to the above invention [3], since the object to be printed is a can, it is generally required that the can use a different printing plate for each product. It can be carried out.

  According to the invention [4], a rectangular elastic material sheet having a resin layer to be a plate part formed on one side is wound around the outer peripheral surface of the cylinder member and rounded, and both ends of the sheet are overlapped to form a cylinder. Compared with the case where the end surfaces of the sheets are butt-welded for joining, a cylindrical printing plate can be easily manufactured. In addition, since such a cylindrical printing plate is mounted on a cylinder of a printing press for printing, the printing plate can be easily attached to and removed from the printing press.

  According to the invention [5], since the plate part engraving step is performed after the cylindrical material forming step, the printing pattern of the plate portion can be accurately formed at a predetermined position of the printing plate previously formed into a cylindrical shape. In particular, when a plurality of plate portions, for example, two plate portions, are formed for one printing plate, the positions of printing patterns on the plurality of plate portions can be determined by an engraving machine, so that the plate portions are formed on each plate portion. The relative alignment between printed patterns can be accurately performed.

  According to the invention [6], the end of one side of the elastic material sheet is bent to the opposite side of the surface on which the resin layer is formed to form the engaging portion. The elastic material sheet is wound around the outer peripheral surface of the cylinder and rolled in a state in which the is engaged with the engaging groove formed on the outer peripheral surface of the cylinder member. Can be formed into a cylindrical shape, and high shape accuracy can be obtained.

  According to the above invention [7], prior to the cylindrical material forming step, the non-plate portion that does not become the plate portion is removed from the resin layer of the elastic material sheet. Molding can be performed more easily.

  According to the invention [8], prior to the plate part engraving step, at least the surface of the resin layer of the non-printed part where the printing pattern is not formed is removed from the plate part. The engraving time can be reduced, and the plate portion can be formed efficiently.

  According to the invention [9], since the ultraviolet curable resin is used as the resin layer to be the plate portion, it does not require a complicated cleaning operation with other solvents such as a curable resin or high-pressure steam, and is generally easily washed with water. A cleaning operation can be performed.

  According to the above invention [10], prior to the plate engraving step, the printing portion of the plate portion on which the printing pattern is formed is cured by irradiating ultraviolet rays, and the plate portion necessary for printing is left to be washed and dried. Since the drying step is performed, the plate portion can be efficiently formed by reducing the engraving time for the resin layer of the non-printing portion in the plate portion engraving step.

  According to the invention [11], the plate part engraving process engraves the printed pattern using a laser engraving machine, and therefore, engraving with a higher number of lines can be achieved compared to conventional photoetching or the like. Moreover, since a negative film process is unnecessary, it can engrave directly on the board hardened previously, and an operation | work is simplified.

  According to the invention [12], the plate portion is provided in a part of the outer peripheral portion of the plate main body formed in a cylindrical shape by the elastic material, and the engagement portion protrudes inwardly on the inner periphery of the plate main body and extends in the axial direction. Is a device that is fixedly provided on a plate drive shaft of a printing machine, and is provided on a plate drive shaft in a fixed manner from the front end side of the plate drive shaft. Circumferential positioning in which a plate cylinder portion having a cylindrical plate mounting surface on which a printing plate is mounted is provided, and an engagement portion of the printing plate is fitted to the outer periphery of the plate cylinder portion from the front end side of the plate driving shaft Since the printing groove and the axial positioning stopper with which the end of the printing plate abuts are provided, printing is performed so that the engaging portion of the printing plate fits in the circumferential positioning groove of the plate cylinder portion. Fit the printing plate to the outer periphery of the printing cylinder from one end, and place the printing plate end in the axial direction. By abutting in order stopper, the positioning is made radial and axial directions of the printing plate can be attached accurately and easily at a predetermined position of the plate cylinder section a printing plate.

  According to the invention [13], the circumferential positioning groove is formed such that its bottom portion is on the rear side in the rotational direction from the opening, and the circumferential positioning groove is formed with the cylindrical surface including the plate mounting surface. Since the angle formed is set smaller than the angle formed by the engaging portion of the printing plate and the cylindrical surface formed by the printing plate, the tip of the engaging portion of the printing plate is the circumferential positioning groove. The inner surface is in contact with the side far from the engaging portion, and the proximal end portion of the engaging portion contacts the side closer to the engaging portion of the inner surface of the groove. As a result, the positioning of the plate is determined without moving to one point, and the displacement due to the rotation of the plate can be effectively prevented even after mounting.

  According to the above invention [14], the printing plate is formed on the outer periphery of the plate cylinder part by pushing a part of the printing plate mounted on the plate cylinder part from the radially inner side to the radially outer side to expand the diameter of the part. Since the plate fixing member for tightly fixing to the plate mounting surface of the plate cylinder portion is provided, the printing plate mounted on the plate cylinder portion can be easily fixed to the plate mounting surface of the plate cylinder portion.

  According to the above invention [15], the plate fixing member can move between a position immersed inside a cylindrical surface including the plate mounting surface of the plate cylinder portion and a position outside the recessed position, and is optional. Since the plate can be fixed to the position, when the plate is attached to or removed from the plate cylinder part, the plate fixing part seat is fixed at a position immersed inside the cylindrical surface including the plate mounting surface so that the plate is not pushed. . Then, after the plate is attached to the plate cylinder part, the plate fixing member is fixed at a position protruding outward from the cylindrical surface including the plate mounting surface, thereby pushing the plate radially outward to bring it into close contact with the plate mounting surface. And fix. In this way, it is possible to simply attach and remove the plate and fix the plate simply by moving the plate fixing member and fixing it to an arbitrary position.

  According to the invention [16], the plate fixing member is disposed at a position to push the non-plate portion on which the plate portion of the printing plate mounted on the plate cylinder is not formed from the radially inner side to the radially outer side. The plate portion is not pushed outward in the radial direction, and deformation of the plate portion can be suppressed to prevent deterioration in print quality.

  According to the above invention [17], the printing plate has a cylindrical plate body formed by forming a rectangular elastic material sheet into a cylindrical shape and overlapping and joining both ends thereof. The end portion of the sheet located on the inner side is bent inward to form an engaging portion, and a plate portion is provided at a predetermined position on the outer peripheral surface of the plate main body excluding the joining portion. The plate portion is pushed outward in the radial direction because the overlapping portion where the both ends of the printing plate sheets mounted on the plate cylinder are overlapped is arranged to be pushed from the radially inner side to the radially outer side. Therefore, it is possible to suppress the deformation of the plate portion and prevent the print quality from being deteriorated.

  According to the invention [18], a part of the cylindrical surface on the outer periphery of the plate cylinder portion is removed in the circumferential direction to form a plate fixing member mounting surface positioned radially inward from the cylindrical surface including the plate mounting surface. Since the plate fixing member is fitted in the plate fixing member recess formed on the plate fixing member mounting surface so that the plate fixing member can move in the radial direction, a part of the plate cylinder portion in the circumferential direction is removed. Thus, the circumferential length of the plate cylinder portion is substantially shortened, and the cylindrical printing plate can be easily inserted. Further, the portion of the printing plate that is pushed radially outward by the plate fixing member is smaller in diameter than the other portions by removing a portion of the plate cylinder portion in the circumferential direction. It is possible to avoid or reduce the situation where the pressed portion protrudes radially outward from other portions of the printing plate.

  According to the invention [19], the wedge member having the wedge surface radially outward is fitted in the wedge member recess formed in the bottom of the recess of the plate fixing member mounting surface so as to be movable in the axial direction. The plate cylinder portion is provided with screw means for moving the wedge member in the axial direction to stop it at an arbitrary position, and a wedge surface that contacts the wedge surface of the wedge member is formed on the radially inner side of the plate fixing member. Therefore, the plate can be easily attached and removed and the plate can be fixed simply by moving the wedge member with the screw means and fixing it to an arbitrary position.

  According to the invention [20], the wedge surface of the plate fixing member is wedged by urging the plate fixing member radially inward using a permanent magnet between the plate cylinder portion or the wedge member and the plate fixing device. Since the biasing means for pressing the wedge surface of the member is provided, the plate fixing member can be held at the radially inner position when the printing plate is not pushed by the plate fixing member.

  According to the invention [21], the plate fixing member has a diameter of a part of the printing plate mounted on the plate cylinder portion within the range of the inner surface of the cylindrical surface formed by the outer surface including the printing plate portion. The cylindrical surface formed by the outer surface including the printing plate portion of the printing plate is formed by a part of the printing plate that has been pressed radially outward by the plate fixing member to increase the diameter by pushing from the inner side to the outer side in the radial direction. It is possible to prevent a situation in which printing ink or the like sticks out to the outside and causes printing stains.

  According to the invention [22], the air chamber to which the compressed air is supplied by the air supply means is formed inside the plate cylinder portion, and the outer diameter on the tip side of the plate cylinder portion becomes smaller toward the tip. In addition, air outflow holes communicating with the air chambers are formed at a plurality of locations in the axial direction and the circumferential direction of the outer peripheral surface of the plate cylinder portion including the portion where the outer diameter is reduced. The air is formed between the plate cylinder and the printing plate so that the printing plate can be easily attached to the plate cylinder or the printing plate can be easily removed from the plate cylinder. Can do.

  According to the invention [23], since the printing press includes the printing plate mounting device, the cylindrical plate can be attached to and removed from the printing press very easily.

  According to the invention [24], the printing system includes a printing machine having the printing plate mounting device and an engraving machine having the same printing plate mounting device as the printing machine. The plate part engraving process in the engraving machine can be performed under the same conditions as the printing process, and the displacement of the plate part between the two processes can be eliminated.

  According to the invention [25], in the printing plate, a plate main body formed in a cylindrical shape by an elastic material, an engagement portion projecting inwardly on the inner periphery of the plate main body and extending in the axial direction, and the outer periphery of the plate main body Since the plate portion formed on the surface is provided, the engagement portion can be engaged with the plate cylinder portion of the printing plate mounting device, thereby achieving high mounting position accuracy with respect to the plate cylinder portion. Obtainable.

  According to the invention [26], the plate body is formed by forming a rectangular elastic material sheet into a cylindrical shape and overlapping and joining both ends thereof, and the engaging portion is formed of a joining portion. The end portion of the sheet located on the inner side is formed by being bent inward, and the plate portion is provided at a predetermined location excluding the joining portion, so compared with the case where the end surface of the sheet is butt welded, etc. A cylindrical printing plate can be easily manufactured, and attachment and detachment to the printing press can be easily performed while obtaining positioning accuracy with the printing plate cylinder portion of the printing press at the engaging portion.

  According to the invention [27], since the bending angle of the engaging portion is larger than 90 degrees, the front end side of the engaging portion faces the rear side in the rotation direction, and when the plate cylinder rotates, the engaging portion is It does not bite into the groove and the plate position does not shift.

  In the present invention, the “bending angle” is an angle at which the engaging portion is actually bent from a flat sheet state. Therefore, the angle formed between the engaging portion and the adjacent sheet portion (the angle between the sheet and the engaging portion) is a value obtained by subtracting the folding angle from 180 degrees. When the bending angle of the engaging portion is larger than 90 degrees, the angle between the sheet and the engaging portion is smaller than 90 degrees.

  The folding angle is preferably 125 ° to 145 ° (the sheet / engagement portion angle is 55 ° to 35 °), and the folding angle is most preferably 135 ° (the sheet / engagement portion angle is 45 °).

FIG. 1 is a longitudinal cross-sectional view of a plate mounting device 3 mounted on a plate drive shaft 1 of a printing machine or engraving machine and mounted with a plate 2. FIG. 2 is a front view of the plate mounting apparatus 3 of FIG. FIG. 3 is a plan view showing a part of the plate mounting device 3. FIG. 4 is an enlarged longitudinal sectional view showing a part of the plate mounting device 3 and a part of the plate 2 before being mounted thereon. FIG. 5 is a cross-sectional view (transverse cross-sectional view) taken along the line VV of FIG. FIG. 6 is a perspective view showing a cylindrical material forming process in the manufacturing process of the plate 2. FIG. 7 is an enlarged side view showing a part of the state before the plate formation of FIG. FIG. 8 is an explanatory view showing a series of manufacturing steps of the plate 2. FIG. 9 is an enlarged longitudinal sectional view showing a part of the plate 2 mounted on the plate cylinder portion.

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

  FIG. 1 is a longitudinal sectional view of a plate mounting device 3 mounted on a plate driving shaft 1 of the printing machine and mounted with a plate 2, FIG. 2 is a front view of the plate mounting device 3 in FIG. 1, and FIG. FIG. 4 is a plan view showing a part of the mounting device 3, FIG. 4 is a longitudinal sectional view showing a part of the plate mounting device 3 and a part of the printing plate 2 before being attached thereto, and FIG. 1 is a cross-sectional view taken along line V-V in FIG. 1 (transverse cross-sectional view), FIG. 6 is a perspective view showing a cylindrical material forming step in the manufacturing process of the plate 2, and FIG. 7 is a state before forming the plate in FIG. It is a side view which expands and shows a part of. FIG. 8 is an explanatory view showing a series of manufacturing steps of the plate 2. FIG. 9 is an enlarged longitudinal sectional view showing a part of the plate 2 mounted on the plate cylinder portion.

  In the following description, the top and bottom of FIG. 1 is the top and bottom, the left side of FIG. 1 is the front, the right side is the back, and the left and right when viewing the back from the front is the left and right.

  First, the printing plate 2 will be described with reference to FIGS.

  The printing plate 2 includes a plate main body 4 formed in a cylindrical shape by an elastic material, an engagement portion 6 that protrudes inwardly on the inner periphery of the plate main body 4 and extends in the axial direction, and an outer peripheral surface of the plate main body 4. And a plate part 5 formed in the part.

  In this example, as shown in FIG. 6 (b), the plate body 4 is configured by forming a rectangular elastic material sheet 7 in a cylindrical shape and overlapping and joining both ends. The engaging portion 6 is formed by bending the end portion of the sheet 7 located inside the joining portion 8 inward. The plate portion 5 is provided at a predetermined location on the outer peripheral surface of the plate body 4 excluding the joint portion 8.

  The end portion of the sheet 7 located inside the joint portion 8 is bent inward to form the engaging portion 6. In FIG. 7, the angle α at which the engaging portion 6 is actually bent from the flat state of the sheet 7 indicated by the broken line is the folding angle, and the angle β between the engaging portion 6 and the adjacent portion of the sheet 7 is the sheet engagement. This is called the inter-part angle. The folding angle α is preferably larger than 90 degrees (the sheet / engagement portion angle β is smaller than 90 degrees), and the bending angle α is 125 ° to 145 ° (the sheet / engagement portion angle β is 55 ° to 35 °). The bending angle α is most preferably 135 degrees (the sheet-engaging portion angle β is 45 degrees). In this example, the folding angle α is about 135 degrees, and the sheet-engaging portion angle β is about 45 degrees.

  Next, an example of a method for manufacturing the printing plate 2 will be described.

  The plate body 4 is made of a sheet 7 made of an elastic material such as a magnetic or non-magnetic appropriate metal. In this example, a commercially available tin plate (Fe) is employed. The thickness of the sheet 7 may be such that it can be formed in a cylindrical shape and can retain the cylindrical shape by an elastic force. In this example, it is about 0.26 mm.

  In the elastic material sheet 7, a resin layer serving as a plate portion is formed on one side thereof. This resin layer can employ, for example, a resin such as polyvinyl alcohol, vinyl ester, or polyamide, and preferably has a Shore D hardness of, for example, about D20 to 80 after curing. In this example, a normal UV curable resin (ultraviolet curable resin) for offset printing is employed. When such an ultraviolet curable resin is used, a complicated cleaning operation with a solvent other than the other cured resin or high-pressure steam is not required, and the cleaning operation can generally be easily performed with water cleaning. The resin layer only needs to have a thickness necessary for the printing plate portion 5. In this example, a layer having a thickness of 0.4 to 0.6 mm is bonded to one side of the elastic material sheet 7.

  As shown in FIG. 8A, the printing plate 2 is manufactured by first cutting the elastic material sheet 7 into, for example, a rectangular shape having a predetermined size. In this example, a surface printing plate such as an aluminum can is assumed, and a rectangle having a width of about 180 mm and a length of 750 mm is adopted as a size capable of forming the two plate portions 5 on one printing plate 2. ing.

  Then, as shown in FIG. 8B, the portion to be the plate portion 5 is irradiated with ultraviolet rays to be cured by ultraviolet rays, and the uncured portion that becomes the non-plate portion that does not become the plate portion 5 is washed away with water and removed. Thus, since the resin layer of the non-plate portion is removed, the non-plate portion is easily bent, and the bending process of bending the sheet 7 performed in a subsequent process into a cylindrical shape can be easily performed. After drying, post-irradiation is performed so that an uncured portion does not remain in the plate portion. In this example, the two plate portions 5 are formed so as to be separated by a half circumference at a predetermined portion on the outer periphery excluding the joining portion 8 of the plate body 4. The outer peripheral surface of each plate part 5 is a plate surface.

  In addition, the ultraviolet irradiation with respect to the plate part 5 is performed only to the printing part in which the printing pattern is formed in the plate part 5, and the printing part 5 includes a non-printing part in which the printing pattern is not formed. However, it is desirable not to irradiate such non-printing part with ultraviolet rays, but to remove the resin layer together with the non-printing part. If it does in this way, a bending process can be performed more easily and engraving time with respect to the resin layer of a non-printing part can be reduced in a plate part engraving process, and the plate part 5 can be formed efficiently.

  Next, as shown in FIG. 8C and FIG. 6A, one end portion of the rectangular sheet 7 is bent to the lower side (inside) where the resin layer is not formed, and the engaging portion 6 is formed. Form. The downward bending length of the engagement portion 6 is determined by the engagement groove formed in the cylinder when it is mounted on a cylinder portion in a subsequent cylindrical material forming step or a plate cylinder portion of an engraving machine or a printing machine. It is sufficient if there is a width that can be surely engaged. In this example, the width is, for example, about 4 mm. The bending angle α is 45 degrees in this example.

  Next, a cylindrical material forming step is performed in which the sheet 7 on which the engaging portion 6 is formed is formed into a cylindrical shape. Specifically, as shown in FIG. 8 (d), the sheet 7 on which the engaging portion 6 is formed is wound around a cylinder member 40 for a cylindrical material forming step and rolled, and both ends of the sheet 7 are overlapped. Join in a cylindrical shape. An engagement groove 42 is formed on the outer peripheral surface of the cylinder member 40, and the sheet is wound around the outer peripheral surface of the cylinder with the engagement portion 6 of the seat 7 engaged with the engagement groove 42 of the cylinder member 40. Rounded. Thus, since the position of the edge part of the sheet | seat 7 is fixed and shape | molded in a cylindrical shape, while being able to process simply, high shape accuracy can be obtained.

  Any joining means can be adopted as the joining means of the sheet 7 as long as the joining strength can be secured. In this example, an adhesive and spot welding are used. Specifically, before winding around the cylinder member 40, as shown in FIG. 6A, an appropriate adhesive 9 is applied to the surface of the end portion of the sheet 7 on the engagement portion 6 side opposite to the engagement portion 6. Apply. And the sheet | seat 7 is wound around the cylinder member 40, is formed in a cylindrical shape, the edge part 7a of the sheet | seat 7 of the opposite side is piled up and joined on the outer side of the adhesive agent 9, and also the joining part 8 is spotted as needed. We join firmly by welding. In FIG.6 (b), 10 has shown the spot weld part.

  Thus, since both ends of the sheet 7 are overlapped and joined in a cylindrical shape, the cylindrical printing plate 2 can be easily manufactured as compared with the case where the end surfaces of the sheet 7 are butt welded.

  When the printing plate 2 is formed into a cylindrical shape in this way, as shown in FIG. 8E, a plate part engraving process for engraving a printing pattern on the plate part 5 of the printing plate 2 is performed. In this example, the plate engraving process uses a laser engraving machine. This laser engraving machine is equipped with the same mounting device 3 as the printing plate mounting device included in a printing machine that performs printing on an object to be printed. The mounting device 3 includes a plate cylinder portion 12 on which the printing plate 2 is mounted. The configuration of the mounting device 3 will be described in detail later.

  In this way, since the printing pattern is engraved using the laser engraving machine in the plate part engraving process, engraving with a higher number of lines can be performed with higher resolution than conventional photoetching or the like. Moreover, since a negative film process is unnecessary, it can engrave directly on the board hardened previously, and an operation | work is simplified.

  Further, since the plate part engraving step is performed after the cylindrical material forming step, the printing pattern of the plate portion 5 can be accurately formed at a predetermined position of the printing plate 2 formed in a cylindrical shape in advance. In particular, when a plurality of plate portions 5, for example, two plate portions 5 are formed on one printing plate 2, the positions of the printing patterns of the plurality of plate portions 5 can be determined by an engraving machine. The relative alignment between the printed patterns formed on the portion 5 can be accurately performed.

  In addition, you may perform formation of the plate to the plate part 5, ie, plate-making, with respect to the plate part 5 of the state of the sheet | seat 7 of Fig.6 (a) before rolling round.

  Next, the configuration of the plate mounting device 3 will be described with reference to FIGS.

  This plate mounting apparatus is commonly provided in a printing machine that performs printing on an object to be printed and an engraving machine that engraves a printing pattern on a printing plate used in the printing machine.

  Thus, in the printing machine and engraving machine constituting the printing system, by providing a common plate mounting device, the plate part engraving process in the engraving machine can be performed under the same conditions as the printing process in the printing machine, It is possible to eliminate the misalignment of the printing plate between both processes.

  In FIG. 1, reference numeral 11 denotes a bearing housing provided on a machine frame of a printing machine (not shown). The front side portion of the plate drive shaft 1 is rotatably supported by a bearing housing 11, and the rear side portion is rotatably supported by a bearing housing (not shown) provided on the machine frame. The shaft 1 is rotated at a predetermined speed in a predetermined direction (clockwise as viewed from the front in this example) by known driving means. A portion from the front end of the shaft 1 projects forward from the bearing housing 11, and a tapered portion 1 a is formed at the front end portion of the shaft 1 on the front side of the bearing housing 11.

  The plate mounting device 3 is fixed to the shaft taper portion 1a so as to be detachable.

  The plate mounting device 3 includes a plate cylinder portion 12 fixed to the shaft taper portion 1a. The plate cylinder portion 12 has a cylindrical shape in which a tapered hole 13 having a small front inner diameter is formed at the center, and a cylindrical plate mounting surface 14 concentric with the shaft 1 is formed on the outer periphery thereof. In order to reduce weight, the insides of a plurality of locations (four locations in this example) in the circumferential direction of the plate cylinder portion 12 are removed. Accordingly, the plate cylinder portion 12 includes a tapered taper cylinder portion 15 having a taper hole 13 formed on the inner periphery, an outer cylinder portion 16 having a plate attachment surface 14 formed on the outer periphery, and a plurality (this) In the example, it is composed of four) connecting portions 17 and a lid portion 44 that covers the front and rear surfaces of the plate cylinder portion 12. The plate cylinder portion 12 is fixed to the shaft 1 with the shaft taper portion 1 a fitted in the taper hole 13, and rotates integrally with the shaft 1. The rotation direction of the plate cylinder portion 12 is indicated by an arrow R in FIGS.

  The plate mounting surface 14 desirably maintains static friction with a surface roughness of Ra 1 μm or less in order to secure a fixing force due to frictional resistance with the inner surface of the mounted plate 2. Further, considering that the surface roughness is kept small and the surface is hard to be damaged, it is preferable that the plate mounting surface 14 is hard chrome coated (plated).

  A portion of the cylindrical surface is removed at a portion corresponding to the upper connecting portion 17 of the outer cylindrical portion 16 of the plate cylinder portion 12 to form a flat plate fixing member mounting surface 18. A portion of the outer periphery excluding the plate fixing member mounting surface 18 is a plate mounting surface 14. The plate portion 5 of the plate 2 is formed in a portion of the plate main body 4 that is in close contact with the plate mounting surface 14 when the plate 2 is mounted on the plate cylinder portion 12. It is longer than the circumferential length of the portion 5. The plate fixing member mounting surface 18 is located radially inward from the cylindrical surface including the plate mounting surface 14. A tapered tapered surface 19 is formed at the front end portion of the plate mounting surface 14 by chamfering. The outer diameter of the plate mounting surface 14 and the inner diameter of the plate 2 are the same.

  An annular axial positioning stopper 20 protruding slightly outward in the radial direction from the plate mounting surface 14 is fixed to the outer peripheral portion of the rear end surface of the cylindrical portion 16 of the plate cylinder portion 12.

  A circumferential positioning groove 21 in which the engaging portion 6 of the plate 2 is fitted is formed on the entire axial length of the portion on the front side in the rotational direction of the plate fixing member mounting surface 18. The angle formed by the cylindrical surface including the groove 21 and the plate mounting surface 14 is substantially equal to the sheet-engagement portion angle β of the engaging portion 6 of the plate 2. Moreover, the groove | channel 21 is formed so that the bottom part 21a may become a rotation direction rear side from the opening part 21b.

  If the angle formed between the circumferential positioning groove 21 and the cylindrical surface including the plate mounting surface 14 is set to be smaller than the sheet-engagement portion angle β, as shown in FIG. 6 is in contact with the side farther from the engaging portion of the inner surface of the groove 21, and the bent portion 62 of the engaging portion 6 is in contact with the side closer to the engaging portion 6 of the inner surface of the groove 21. 6 is held at two points within the width of the groove 21 in the length direction. As a result, the positioning of the plate 2 is determined without moving to one point, and the displacement due to the rotation of the plate 2 does not occur after mounting.

  A first recess (for the plate fixing member) is formed in a portion on the rear side in the rotational direction from the groove 21 of the plate fixing member mounting surface 18, in this example, in a portion on the rear side in the rotational direction from the intermediate portion in the rotational direction of the plate fixing member mounting surface 18. (Recess) 22 is formed. The recess 22 has a long rectangular shape in the axial direction when viewed from the outside in the radial direction over most of the axial length of the plate fixing member mounting surface 18. The cross-sectional shape of the recess 22 is rectangular, and the bottom wall and both side walls of the recess 22 are flat surfaces. A second recess (wedge member recess) 23 shorter than the first recess 22 is formed in an intermediate portion of the length of the first recess 22 so as to extend a part of the first recess 22 radially inward. Has been. The cross-sectional shape of the second recess 23 is rectangular, and the bottom wall and both side walls of the recess 23 are flat surfaces.

  A plate fixing member 24 that is long in the front-rear direction is fitted in the first recess 22 so as to be movable in the radial direction of the shaft 1. The plate fixing member 24 fits in the recess 22 in the circumferential direction and the axial direction with almost no gap, and moves in the radial direction along both the circumferential side walls and the axial end walls of the recess 22. An end surface 24 a on the radially outer side of the plate fixing member 24 is a flat surface parallel to the plate fixing member mounting surface 18. The end surface 24a may be a cylindrical surface having the same curvature as the plate mounting surface 14 or a similar curvature. A protruding portion 24 b that protrudes inward in the radial direction and fits in a radially outer portion of the second recess 23 is formed in the axially intermediate portion of the radially inner end face of the plate fixing member 24. An end surface on the radially inner side of the protruding portion 24b is a wedge surface 24c facing the radially inner side and the front side. Square grooves 24 are formed at two positions on the front and back sides of the plate fixing member 24. Cutout portions are formed in two front and rear portions on the upper portion of one side wall of the recess 22, and a drop-off preventing member 27 having a tip projecting into the recess 22 is fixed to these cutout portions. Each drop-off prevention member 27 is fitted in the groove 25 of the plate fixing member 24 with a gap in the front-rear direction and the radial direction, and allows movement of the plate fixing member 24 in the radial direction but prevents the drop-off.

  The wedge member 28 is fitted in the second recess 23 so as to be movable in the front-rear direction. The end surface on the radially inner side of the wedge member 28 is a flat surface and is in sliding contact with the bottom wall of the recess 23. The wedge member 28 fits in the recess 23 in the circumferential direction with almost no gap, and moves in the front-rear direction along the bottom wall and both side walls of the recess 23. A radially outer end surface of the wedge member 28 is a wedge surface 28a facing the wedge surface 24c of the plate fixing member 24 and facing the radially outer side and the rear side. The wedge member 28 is formed with a female screw 29 extending rearward from the front end surface thereof.

  A first permanent magnet 30 is embedded and fixed in the wedge surface 24 c of the plate fixing member 24. A second permanent magnet 31 facing the first permanent magnet 30 is embedded and fixed in the bottom wall of the second recess 23. The first permanent magnet 30 and the second permanent magnet 31 are arranged so as to attract each other, and by this magnetic attraction force, the plate fixing member 24 is urged radially inward to wedge the wedge surface 24c of the plate fixing member 24. The urging means is configured to press against the wedge surface 28a of the member 28. By this urging means, when the printing plate 2 is not pushed by the plate fixing member 24, the plate fixing member 24 can be held at a radially inner position.

  A screw member 32 extending in the front-rear direction is provided so as to penetrate the wall of the connecting portion 17 on the front side of the second recess 23. The screw member 32 is supported so as to rotate but not move back and forth by a hole 33 penetrating the wall of the connecting portion 17 in the front-rear direction and a bearing member 34 fixed to the front end surface thereof. The screw member 32 includes a screw portion 35 supported by the hole 33 of the connecting portion 17 and the bearing member 34, and a head portion 36 that is fixed to the front end of the screw portion 35 after passing the screw portion 35 through the bearing member 34. Has been. The screw portion 35 is supported by the hole 33 and the bearing member 34 of the connecting member 17, and a male screw 37 that fits into the female screw 29 of the wedge member 28 is formed at the rear portion of the screw portion 35 extending in the second recess 23. Has been. The head portion 36 projects forward from the connecting portion 17, and a large number of fine detent projections 38 extending in the axial direction are formed on the outer peripheral surface thereof. A base end portion of the rotation preventing member 39 is fixed to the front end surface of the connecting portion 17. The anti-rotation member 39 is made of an elastic member such as a metal plate, and the claw 40 formed at the free end thereof is in pressure contact with the portion between the protrusions 38 on the outer peripheral surface of the screw member head portion 36, so that the screw member It is designed to perform the function of 32 detents.

  By rotating the screw member 32 in the pressing direction, the wedge member 28 moves to the pressing side (rear side), whereby the plate fixing member 24 moves to the pressing side (radially outer side), and the screw member 32 is opposed. The wedge member 28 is moved to the pressure release side (front side) by rotating in the direction of pressure release on the side, whereby the plate fixing member 24 is moved to the pressure release side (inward in the radial direction). The screw member 32 and the female screw 29 of the wedge member 28 constitute screw means for moving the wedge member 28 in the axial direction and fixing it at an arbitrary position.

  The plate fixing member 24 allows a part of the printing plate 2 mounted on the plate cylinder portion 12 to be radially inward from the inside of the cylindrical surface formed by the outer surface including the plate portion 5 of the printing plate 2. The diameter is increased by pushing outward in the radial direction.

Inside the plate cylinder part 12 is formed an air chamber 46 to which compressed air is supplied by a compressed air source (air supply means), and in the axial direction and the circumferential direction of the outer peripheral surface of the plate cylinder part 12, An air outflow hole 48 communicating with the air chamber 46 is formed. The air outflow hole 48 is
It is also formed in a portion where the outer diameter on the front end side of the plate cylinder portion 12 becomes smaller toward the front end.

The inner diameter of the plate 2 mounted on the plate mounting apparatus 3 is set to be approximately the same size as the outer diameter of the plate mounting surface 14 of the plate cylinder portion 12. As shown in FIG. 9, since the plate cylinder portion 12 has a plate fixing member mounting surface 18 with a part of the outer periphery thereof cut away, the plate mounting surface 14 and the plate fixing member mounting surface 18 of the plate cylinder portion 12 are included. The total circumferential length is substantially shorter than the circumferential length of the cylindrical surface 50 formed by the plate mounting surface 14 of the plate cylinder portion 12. The circumferential length of the inner peripheral surface of the plate 2 is slightly larger than the total circumferential length of the plate mounting surface 14 and the plate fixing member mounting surface 18 of the plate cylinder 12, and the plate mounting surface 14 of the plate cylinder 12 is The dimension is set slightly smaller than the circumference of the cylindrical surface to be formed. As a result, as will be described later, the printing plate 2 can be easily inserted into the plate cylinder portion 12, and the portion pressed by the plate fixing member 24 is radially outward from the other portions of the printing plate 2. The situation which protrudes can be avoided.

  In the printing plate mounting step of attaching the plate 2 to the plate mounting apparatus 3, the plate fixing member 24 is positioned radially inward so as not to push the plate 2 radially outward. In such a state, the plate 2 is fitted to the outer periphery of the plate cylinder portion 12 from one end so that the engaging portion 6 of the plate 2 fits into the groove 21 of the plate cylinder portion 12, and one end portion of the plate 2 is fixed to the stopper 20. Abut. Thereby, the plate 2 can be accurately and easily attached to a predetermined position of the plate cylinder portion 12.

  Further, since the circumferential length of the inner peripheral surface of the plate 2 is set slightly larger than the circumferential length of the outer peripheral surface of the plate cylinder portion 12, if the plate 2 is bent in accordance with the shape of the plate cylinder portion 12. A gap is formed between the plate mounting surface 14 and the plate 2 so that the plate 2 can be easily attached to the plate cylinder portion 12.

  Further, when the plate 2 is attached, an air layer is formed between the plate mounting surface 14 of the plate cylinder portion 12 and the printing plate 2 by allowing air to flow out from the air outflow holes 48, thereby the plate cylinder portion. The printing plate 2 can be easily attached to 12.

  When the plate 2 is attached, the screw member 32 is rotated in the pressing direction, the plate fixing member 24 is moved in the pressing direction on the outer side in the radial direction, and pressed against the inner periphery of the joining portion 8 of the plate 2. 2 is pressed to the outside in the radial direction. At this time, a predetermined tension is applied to the plate 2 by the plate fixing member 24, and the plate 2 is tightly fixed to the plate mounting surface 14. In this state, the rotation of the screw member 32 is stopped, and its position is fixed by the rotation preventing member 39. Air outflow from the air outflow hole 48 is stopped. Thereby, the mounting of the plate 2 is completed. At this time, the entire plate portion 5 is in close contact with the plate mounting surface 14 via the plate body 4.

  When the plate 2 is fixed to the plate cylinder 12, as shown in FIG. 9, the height position (radial position) of the outer peripheral surface of the joining portion 8 of the plate 2 pushed out in the diameter increasing direction by the plate fixing member 24 is The outer surface of the plate part 5 of the plate 2 is set so as to be located inside the cylindrical surface formed. As a result, a part of the printing plate 2 whose diameter has been expanded by being pushed radially outward by the plate fixing member 24 protrudes outside the cylindrical surface formed by the outer surface including the plate portion 5 of the printing plate 2, and printing. It is possible to prevent a situation in which printing ink or the like adheres to the portion and causes printing stains.

  Further, the portion of the plate 2 pushed out by the plate fixing member 24 is an overlapping portion 8 in which both ends of the sheet 7 are overlapped, and is a non-plate portion in which the plate portion 5 is not formed. Without being pushed radially outward, deformation of the plate portion 5 can be suppressed, and deterioration in print quality can be prevented.

  In a printing process in which a printing pattern is printed on a printing object by a printing machine, the plate cylinder unit 12 is rotated in a state where the plate 2 is fixed to the plate cylinder unit 12 as described above. At this time, the plate 2 is tightly fixed to the plate mounting surface 14 by the plate fixing member 24, and the front end side of the engaging portion 6 of the plate 2 faces the rear side in the rotation direction R, and the engaging portion 6 is in the groove 21. The position of the plate 2 is not shifted. Further, since the claw 40 of the anti-rotation member 39 bites into the portion between the protrusions 38 of the screw member head 36 by elastic force, the screw member 32 does not rotate due to vibration or the like.

  When the plate 2 mounted on the plate cylinder portion 12 is removed, the screw member 32 is rotated in the pressing release direction, and the plate fixing member 24 is moved in the pressing release direction, and is fixed at the immersion position. Accordingly, a gap is generated between the plate mounting surface 14 and the plate fixing member 24 and the plate 2, and the plate 2 can be moved in the axial direction and easily removed from one end of the plate cylinder portion 12.

  Further, when the plate 2 is removed, air is made to flow out from the air outflow hole 48 to form an air layer between the plate mounting surface 14 of the plate cylinder unit 12 and the printing plate 2, and the plate cylinder unit. The detaching operation of the printing plate 2 from 12 can be further facilitated.

  The overall configuration of the printing press, the plate mounting device 3 and the printing plate 2 and the configuration of each unit are not limited to those of the above-described embodiment, and can be changed as appropriate.

  For example, the plate 2 may be one in which an engaging portion made separately from the cylindrical plate body is fixed. A seamless cylindrical material may be used.

  In the above embodiment, the screw member 32 is manually rotated. However, the screw member 32 may be rotated by power such as electric power.

  In the above embodiment, the wedge member is moved in the axial direction and the plate fixing member is moved in the radial direction. However, the plate fixing member may be moved in the radial direction manually or by power.

  Further, in the above embodiment, the plate 2 is pushed from the radially inner side to the radially outer side by moving the plate fixing member in the radial direction. For example, the plate is rotated by rotating the eccentric fixing member. You may make it push from a radial inside to a radial outside.

DESCRIPTION OF SYMBOLS 1 Plate drive shaft 2 Printing plate 3 Plate mounting apparatus 4 Plate main body 5 Plate portion 6 Engagement portion 12 Plate cylinder portion 14 Plate mounting surface 18 Plate fixing member mounting surface 20 Axial positioning stopper 21 Circumferential positioning groove 22 1 recess (recess for plate fixing member)
23 Second recess (Wedge member recess)
24 plate fixing member 24a wedge surface 28 wedge member 28a wedge surface 30, 31 permanent magnet 32 screw member 40 cylinder member 42 engagement groove 46 air chamber 48 air outflow hole

Claims (27)

A cylindrical material molding step in which a rectangular elastic material sheet having a resin layer to be a plate part formed on one side is wound around an outer peripheral surface of a cylinder member and rounded, and both ends of the sheet are overlapped and joined in a cylindrical shape,
A plate engraving process for engraving a printing pattern on the plate,
A printing plate mounting process for mounting the produced cylindrical printing plate on a cylinder of a printing press;
A printing process in which a printing pattern is printed on a printing object by a printing machine;
A printing method comprising:   The printing method according to claim 1, wherein a plate engraving step is performed after the cylindrical material forming step.   The printing method according to claim 1, wherein the printing object is a can. A cylindrical material molding step in which a rectangular elastic material sheet having a resin layer to be a plate part formed on one side is wound around an outer peripheral surface of a cylinder member and rounded, and both ends of the sheet are overlapped and joined in a cylindrical shape,
A plate engraving process for engraving a printing pattern on the plate,
A method for producing a printing plate, comprising:   The method for producing a printing plate according to claim 4, wherein an engraving step is performed after the cylindrical material forming step. Folding the end of one side of the elastic material sheet to the opposite side of the surface on which the resin layer is formed to form the engaging portion,
6. The cylindrical material forming step, wherein the elastic material sheet is wound around the outer peripheral surface of the cylinder and rolled up with the engaging portion engaged with an engaging groove formed on the outer peripheral surface of the cylinder member. The manufacturing method of the printing plate as described.   The method for producing a printing plate according to any one of claims 4 to 6, wherein a non-plate portion that does not become a plate portion is removed from the resin layer of the elastic material sheet prior to the cylindrical material forming step.   The method for producing a printing plate according to any one of claims 4 to 7, wherein at least the surface of the resin layer of the non-printing portion where the printing pattern is not formed is removed from the plate portion prior to the plate portion engraving step.   The method for producing a printing plate according to any one of claims 4 to 8, wherein an ultraviolet curable resin is used as the resin layer serving as the plate portion.   Prior to the plate part engraving step, a water washing / drying step is performed in which the printing portion of the plate portion on which the printed pattern is formed is cured by irradiating with ultraviolet rays, and the plate portion necessary for printing is left and washed and dried. The manufacturing method of the printing plate as described.   The plate part engraving step is a method for producing a printing plate according to any one of claims 4 to 10, wherein the printing pattern is engraved using a laser engraving machine. A printing plate in which a plate portion is provided on a part of the outer peripheral portion of a plate body formed in a cylindrical shape by an elastic material, and an engaging portion extending inward in the inner periphery of the plate body is formed extending in the axial direction. Is a device that is fixed to the plate drive shaft of a printing press,
A plate cylinder portion having a cylindrical plate mounting surface provided on the plate drive shaft in a fixed manner and mounted on the outer periphery from the front end side of the plate drive shaft;
On the outer periphery of the plate cylinder portion, there are provided a circumferential positioning groove into which the engaging portion of the printing plate is fitted from the front end side of the plate driving shaft, and an axial positioning stopper with which the end portion of the printing plate abuts. An apparatus for mounting a printing plate, wherein The circumferential positioning groove is formed such that its bottom is on the rear side in the rotational direction from the opening,
The angle formed between the circumferential positioning groove and the cylindrical surface including the plate mounting surface is set to be smaller than the angle formed between the engaging portion of the printing plate and the cylindrical surface formed by the printing plate. The apparatus for mounting a printing plate according to claim 12, wherein:   On the outer periphery of the plate cylinder portion, a portion of the printing plate mounted on the plate cylinder portion is pushed from the radially inner side to the radially outer side to expand the diameter of the portion, so that the printing plate is placed on the plate mounting surface of the plate cylinder portion. 14. The plate mounting apparatus for printing according to claim 12 or 13, wherein a plate fixing member for tightly fixing is provided.   The plate fixing member can move between a position immersed inside the cylindrical surface including the plate mounting surface of the plate cylinder portion and a position outside the recessed position, and can be fixed at an arbitrary position. The apparatus for mounting a printing plate according to claim 14.   The printing plate fixing member according to claim 14 or 15, wherein the printing plate fixing member is arranged at a position to push a non-printing portion of the printing plate mounted on the printing cylinder where the printing plate portion is not formed from the radially inner side to the radially outer side. Plate mounting device. The printing plate is formed by forming a rectangular elastic material sheet into a cylindrical shape and joining the two ends overlapped to form a cylindrical plate body, and the end of the sheet located inside the joining portion. Is bent inward to form an engaging portion, and a plate portion is provided at a predetermined location on the outer peripheral surface of the plate main body excluding the joining portion,
The plate fixing member is disposed at a position to push the overlapping portion where both ends of the printing plate sheet mounted on the plate cylinder are overlapped from the radially inner side to the radially outer side. The printing plate mounting apparatus described in 1.   A part of the cylindrical surface on the outer periphery of the plate cylinder portion is removed in the circumferential direction to form a plate fixing member mounting surface positioned radially inward from the cylindrical surface including the plate mounting surface. 18. The printing plate mounting apparatus according to claim 14, wherein the plate fixing member is fitted in the formed recess for the plate fixing member so as to be movable in a radial direction. A wedge member having a wedge surface radially outward is fitted in a wedge member recess formed in the bottom of the recess of the plate fixing member mounting surface so that the wedge member can move in the axial direction.
The plate cylinder portion is provided with screw means for moving the wedge member in the axial direction and stopping it at an arbitrary position.
The printing plate mounting apparatus according to claim 18, wherein a wedge surface that contacts the wedge surface of the wedge member is formed on a radially inner side of the plate fixing member.   Between the plate cylinder part or the wedge member and the plate fixing device, a permanent magnet is used to urge the plate fixing member radially inward so as to press the wedge surface of the plate fixing member against the wedge surface of the wedge member. 20. The apparatus for mounting a printing plate according to claim 19, further comprising a biasing means.   The plate fixing member pushes a part of the printing plate mounted on the plate cylinder part from the radially inner side to the radially outer side within the range of the inside of the cylindrical surface formed by the outer surface including the plate part of the printing plate. 21. The apparatus for mounting a printing plate according to claim 18, wherein the diameter of the printing plate is increased.   An air chamber to which compressed air is supplied by air supply means is formed inside the plate cylinder portion, and the outer diameter on the tip side of the plate cylinder portion becomes smaller toward the tip, and this outer diameter becomes smaller. The air outflow hole which connects with an air chamber is formed in the axial direction of the outer peripheral surface of the plate cylinder part containing the part which became, and the several places of the circumferential direction, The any one of Claims 12-21 characterized by the above-mentioned. Printing plate mounting device.   A printing machine comprising the printing plate mounting device according to any one of claims 12 to 22. A printing press comprising the printing plate mounting device according to any one of claims 12 to 22,
An engraving machine comprising the same printing plate mounting device as the printing machine, and engraving a printing pattern on the plate portion of the mounted printing plate;
A printing system comprising: A plate body formed into a cylindrical shape by an elastic material;
An engaging portion that protrudes inwardly on the inner periphery of the plate body and extends in the axial direction;
A plate portion formed on the outer peripheral surface of the plate body;
A printing plate characterized by comprising: The plate body is formed by forming a rectangular elastic material sheet into a cylindrical shape and overlapping and joining both ends,
The engaging portion is formed by bending the end portion of the sheet located inside the joining portion inside,
26. The printing plate according to claim 25, wherein the plate portion is provided at a predetermined location excluding a joint portion.   The printing plate according to claim 26, wherein a bending angle of the engaging portion is larger than 90 degrees.

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