JP2008173988A - Printer - Google Patents

Abstract

There has been a strong demand for a printing press that can minimize loss of sheet-like material.
A Taise' position and conveyance distance L ₁ is the sheet by the impression cylinder 22 of the sheet 100 between the Taise' position of the impression cylinder 22 of the numbering cylinder 25 of the impression cylinder 22 of the stamp cylinder 23 The printing surface has a length L ₀ or more in the conveying direction (L ₁ ≧ L ₀ ), and the position where the numbering cylinder 27 contacts the impression cylinder 22 and the impression cylinder 22 of the discharge cylinder 29 The conveyance distance L _{2 of the} sheet 100 by the impression cylinder 22 between the contact position and the length of the printing surface of the sheet 100 in the conveyance direction is equal to or longer than L ₀ (L ₂ ≧ L ₀ ). The conveyance distance L _{3 of the} sheet 100 by the impression cylinder 22 between the position where the stamp cylinder 23 is in contact with the impression cylinder 22 and the position where the number cylinder 27 is in contact with the impression cylinder 22 is the effective surface of the impression cylinder 22. the length L _a and the notch portion length twice and the combined length of the L _b of the (L _a + 2L _b) having the following length _{(L 3 ≦ L a + 2L} b), the impression cylinder 22 In contrast, seal cylinder 23, number cylinder 5, 27, a delivery cylinder 29 is disposed, respectively.
[Selection] Figure 1

Description

  The present invention relates to a printing machine, and is particularly effective when applied to printing securities, banknotes, and the like.

  FIG. 5 shows a schematic structure of an example of a conventional printing machine that prints securities, banknotes, and the like. As shown in FIG. 5, the paper supply unit 110 is provided with a paper stack 111. The paper feeder 110 is provided with a feeder board 112 that feeds the sheets 100 on the paper stack 111 to the printing unit 120 one by one. A swing device 113 is provided at the front end of the feeder board 112 to transfer the sheet 100 to the transfer cylinder 121a.

  The transfer cylinder 121a is in contact with the impression cylinder 122a of the printing unit 120 via the transfer cylinders 121b and 121c. A stamp cylinder 123 for printing a seal is in contact with the impression cylinder 122a. The roller group of the ink supply device 124 is in contact with the stamp cylinder 123. Number cylinders 125a and 127a for printing numbers are in contact with the impression cylinder 122a. These number cylinders 125a and 127a are in contact with a roller group of the ink supply device 126a. A transfer drum 121d is in contact with the pressure drum 122a. A pressure drum 122b is in contact with the transfer drum 121d. Number cylinders 125b and 127b for printing numbers are in contact with the impression cylinder 122b. The number cylinders 125b and 127b are in contact with a roller group of the ink supply device 126b. A discharge drum 129 is in contact with the pressure drum 122b.

  The paper discharge drum 129 is provided with a sprocket 131 coaxially. The paper discharge unit 130 is provided with a sprocket 132. A paper discharge chain 133 is stretched between the sprockets 131 and 132. The paper discharge chain 133 is provided with a plurality of paper discharge claws 134 at predetermined intervals. The paper discharge unit 130 is provided with piles 135a to 135c on which printed sheets 100 are stacked.

  In such a printing machine, when the sheet 100 is transferred from the paper stack 111 of the paper supply unit 110 to the transfer cylinder 121a via the feeder board 112, the sheet 100 is transferred via the transfer cylinders 121b and 121c. Passed to the impression cylinder 122a of the printing unit 120, the seal is printed by the seal cylinder 123, the number is printed by the number cylinders 125a and 127a, and then passed to the impression cylinder 122b via the transfer cylinder 121d. After the numbers are printed by the cylinders 125b and 127b, the number is printed on the sheet discharge claw 134 of the sheet discharge unit 130 via the sheet discharge cylinder 129, conveyed along with the traveling of the sheet discharge chain 133, and discharged to the piles 135a to 135c. It is supposed to be paper.

Microfilm of Japanese Utility Model No. 59-188277 (Japanese Utility Model Application No. 61-102527) Japanese Patent Publication No. 50-006805 JP-A-60-206645 Microfilm of Japanese Utility Model No. 60-141929 (Japanese Utility Model Application No. 62-050931) Japanese Unexamined Patent Publication No. 63-188049 JP 47-012109 A

The conventional printing press as described above has the following problems.
(1) Since the number is printed on the number cylinder 125a while the stamp is printed on the sheet 100 with the stamp cylinder 123, the printing on the stamp cylinder 123 is performed with slight vibration when the number is printed on the number cylinder 125a. There is a risk that the paper will be slightly shifted and a waste paper will be generated.
(2) Since the number 100 is printed on the sheet 100 with the number cylinders 127a and 127b, the sheet 100 is replaced from the impression cylinders 122a and 122b to the transfer cylinder 121d or the discharge cylinder 129. At this time, the terminal side of the sheet 100 is pulled by the numbering cylinders 127a and 127b due to the ink during number printing, and the transfer cylinder 121d and the discharge cylinder 129 fail to hold the sheet 100, and the sheet 100 Or the trailing end of the sheet 100 is pulled to the transfer cylinder 121d side or the sheet discharge cylinder 129 side during number printing, causing number printing failure and causing loss of paper.

  For this reason, there has been a strong demand for a printing machine that can minimize loss of sheet-like material such as the sheet 100.

In order to solve the above-described problem, the printing press according to the present invention has an effective surface having _a length La that holds a sheet-like material whose length in the transport direction of the printing surface is L ₀ along the circumferential direction. A plurality of rotatable impression cylinders at intervals, a first printing unit that contacts the impression cylinder so as to be capable of approaching and separating, and a contact position of the first printing unit with respect to the impression cylinder Also, the second printing unit that makes contact with the impression cylinder on the downstream side in the rotational direction of the impression cylinder so as to be able to approach and separate from the impression cylinder, and the contact position of the second printing unit with respect to the impression cylinder A number printing unit that is capable of approaching and separating from the impression cylinder on the downstream side in the rotation direction of the impression cylinder and performing number printing on the sheet-like material; It contacts the impression cylinder on the downstream side in the rotation direction of the cylinder and receives the sheet-like material from the impression cylinder. In a printing machine comprising a conveying cylinder, the sheet by the impression cylinder between a contact position of the first printing unit with the impression cylinder and a contact position of the second printing unit with the impression cylinder The sheet conveyance distance L ₁ has a length L ₀ or more in the conveyance direction of the printing surface of the sheet (L ₁ ≧ L ₀ ), and the number printing unit is in contact with the impression cylinder The conveyance distance L ₂ of the sheet-like material by the impression cylinder between the position and the contact position of the conveyance cylinder with the impression cylinder is longer than the length L ₀ in the conveyance direction of the printing surface of the sheet-like article. (L ₂ ≧ L ₀ ), and a sheet shape by the impression cylinder between a contact position of the first printing section with the impression cylinder and a contact position of the number printing section with the impression cylinder The object transport distance L ₃ is a length (L ₃₎ that is equal to or less than the total length of the effective surface length L _a that is twice the length L _b between the adjacent effective surfaces of the impression cylinder. ≦ L _a + So as to have a L _b), the first printing unit, the second print unit, together with the number printing portion and the transport cylinder are arranged respectively, when said number printing portion is generated number printing failure, The first printing unit, the second printing unit, and the number printing unit are separated from the impression cylinder so as to retract immediately.

  According to the printing machine of the present invention, it is possible to suppress the loss of the sheet-like material as much as possible.

  An embodiment of a printing press according to the present invention will be described with reference to FIGS. 1 is an overall schematic configuration diagram thereof, and FIG. 2 is an enlarged view of the main part of FIG.

  As shown in FIG. 1, the paper feeding unit 10 is provided with a paper stack 11. The paper feeding unit 10 is provided with a feeder board 12 that feeds the sheet 100 that is a sheet on the paper stack 11 to the printing unit 20 one by one. At the tip of the feeder board 12, there is provided a swing device 13 for passing the sheet 100 to the transfer cylinder 21a.

  The transfer cylinder 21a is in contact with the impression cylinder 22 of the printing unit 20 via the transfer cylinder 21b. On the downstream side of the transfer cylinder 21 a of the impression cylinder 22, a relief stamp cylinder 23 for printing a seal is in contact with the impression cylinder 22 so as to be able to approach and separate (cylinder insertion, cylinder removal). A roller group of the ink supply device 24 is in contact with the stamp cylinder 23. On the downstream side of the impression cylinder 23 of the impression cylinder 22, a number cylinder 25 on which a number is printed is in contact with the impression cylinder 22 so as to be able to approach and separate (cylinder insertion, cylinder removal). A roller group of the ink supply device 26 is in contact with the number cylinder 25. On the downstream side of the numbering cylinder 25 of the impression cylinder 22, a numbering cylinder 27 for printing a number is in contact with the impression cylinder 22 so as to be able to approach and separate (cylinder insertion and cylinder removal). The number cylinder 27 is in contact with a roller group of the ink supply device 28. A discharge cylinder 29 that is a conveying cylinder is in contact with a downstream side of the numbering cylinder 27 of the impression cylinder 22.

  In this embodiment, the first printing unit is constituted by the stamp cylinder 23 and the ink supply device 24 and the second printing unit is constituted by the number cylinder 25 and the ink supply device 26. The number printing unit is configured by the supply device 28 and the like.

  Here, the impression cylinder 22 is an effective surface for holding the sheet 100 (in FIG. 1 and FIG. 2, it is a blackened portion and has a length substantially the same as the length of the sheet 100 in the vertical direction). .) Is a multiple cylinder (double cylinder in the present embodiment) having a plurality (two surfaces in the present embodiment) at regular intervals along the circumferential direction. It is a notch to prepare. On the other hand, the transfer cylinders 21a and 21b, the seal cylinder 23, and the number cylinders 25 and 27 are single cylinders each having the effective surface and the cutout portion.

Further, as shown in FIG. 2, the conveyance distance L of the sheet 100 by the impression cylinder 22 between the contact position of the stamp cylinder 23 with the impression cylinder 22 and the contact position of the numbering cylinder 25 with the impression cylinder 22. ₁ has a length L ₀ or more in the transport direction (vertical direction) of the printing surface of the sheet 100 (L ₁ ≧ L ₀ ), and the contact position of the numbering cylinder 27 with the impression cylinder 22 The conveyance distance L ₂ of the sheet 100 by the impression cylinder 22 between the contact position of the sheet discharge cylinder 29 and the impression cylinder 22 is not less than the length L ₀ of the printing surface of the sheet 100 in the conveyance direction. (L ₂ ≧ L ₀ ), and the sheet by the impression cylinder 22 between the contact position of the stamp cylinder 23 with the impression cylinder 22 and the contact position of the number cylinder 27 with the impression cylinder 22 conveyance distance L ₃ of 100 without the double and the combined length of the length L _b of the effective surface and the length L _a the notch (L _a + 2L _b) following the length of the impression cylinder 22 and that (L ₃ ≦ L _a +2 _b).

  On the other hand, as shown in FIG. 1, a sprocket 31 is coaxially provided on the paper discharge drum 29. The paper discharge unit 30 is provided with a sprocket 32. A paper discharge chain 33 is stretched between the sprockets 31 and 32. The paper discharge chain 33 is provided with a plurality of paper discharge claws (not shown) at predetermined intervals. The paper discharge unit 30 is provided with piles 35a and 35b on which printed sheets 100 are stacked.

  In such a printing machine, when the sheet 100 is passed from the paper stack 11 of the paper feeding unit 10 to the transfer cylinder 21a via the feeder board 12, the sheet 100 is transferred to the printing unit via the transfer cylinder 21b. 20 is transferred to the impression cylinder 22, and a seal is printed by the seal cylinder 23, and a number is printed by the number cylinders 25 and 27, and then the paper discharge nail 29 of the paper discharge unit 30 is added to the discharge claw The paper is transported as the paper discharge chain 33 travels and is discharged to the piles 135a and 135b.

Here, as described above, the conveyance distance L of the sheet 100 by the impression cylinder 22 between the contact position of the stamp cylinder 23 with the impression cylinder 22 and the contact position of the number cylinder 25 with the impression cylinder. _{Since 1} has a length L ₀ or more in the conveyance direction of the printing surface of the sheet 100 (L ₁ ≧ L ₀ ), printing of the seal on the sheet 100 with the stamp cylinder 23 is completed. After that, the number is printed on the sheet 100 with the number cylinder 25. For this reason, there is no influence of slight vibration during printing on the stamp cylinder 23 during number printing on the number cylinder 25, and the occurrence of damaged paper can be suppressed.

Further, the transport distance L _{2 of the} sheet 100 by the impression cylinder 22 between the position where the number cylinder 27 is in contact with the impression cylinder 22 and the position where the discharge cylinder 29 is in contact with the impression cylinder 22 is the sheet. 100 has a length equal to or greater than the length L ₀ in the conveying direction (L ₂ ≧ L ₀ ), and after printing the number on the sheet 100 with the number cylinder 27, the sheet 100 is removed from the impression cylinder 22. The paper discharge cylinder 29 is replaced. For this reason, the end side of the sheet 100 is not pulled toward the numbering cylinder 27 by the ink during number printing at the time of switching, so that the sheet discharge cylinder 29 can reliably hold the sheet 100. At the same time, since the terminal side of the sheet 100 is not pulled toward the discharge cylinder 29 during number printing, the number printing can be performed reliably, and the occurrence of damaged paper can be suppressed.

The conveyance distance L _{3 of the} sheet 100 by the impression cylinder 22 between the position where the stamp cylinder 23 is in contact with the impression cylinder 22 and the position where the number cylinder 27 is in contact with the impression cylinder 22 is effective for the impression cylinder 22. Since the length is equal to or shorter than the total length (L _a + 2L _b ) of the length L _{a of the} surface and twice the length L _b of the notch (L ₃ ≦ L _a + 2L _b ), the single wafer After printing the number on the paper 100 with the number cylinder 27, printing of the seal on the stamp cylinder 23 on the new sheet 100 is started.

  For this reason, for example, even if the numbering cylinder 27 causes a number conversion failure, the stamp cylinder 23 and the numbering cylinders 25 and 27 are immediately retracted (cylindered) to count from the sheet 100 that has been determined to be number conversion defective. Thus, the second and subsequent sheets 100 can be easily stopped without printing a seal or number. Furthermore, printing can be stopped on the first sheet 100 counted from the sheet 100 that has been determined to have a number conversion failure when good number printing by the seal and the number cylinder 25 is completed. Therefore, if only the number printing by the number cylinder 27 is performed after the number cylinder 27 is inspected and corrected, it can be handled as a regular sheet, not as a waste paper. Therefore, the defectively printed sheet 100 can be suppressed to only one sheet, and the occurrence of damaged paper can be suppressed.

  Therefore, according to such a printing machine, the loss of the sheet 100 can be suppressed as much as possible.

  In the present embodiment, the seal is printed directly from the relief stamp cylinder 23. For example, as shown in FIG. 3, the seal is printed from the plate cylinder 23b through the rubber cylinder 23a with an offset. In this case, instead of the contact position of the stamp cylinder 23 with the impression cylinder 22, the contact position of the rubber cylinder 23a with the impression cylinder 22 may be considered as shown in FIG. .

  In the present embodiment, the paper discharge drum 29 is applied as the transport drum, and the sheet 100 is discharged from the paper discharge drum 29 to the piles 35 a and 35 b of the paper discharge unit 30 via the paper discharge chain 33. However, for example, a transfer cylinder is applied as the transfer cylinder, and the sheet-like material is passed to the sheet discharge cylinder through one or more transfer cylinders, or a new one or more transfer cylinders are used. It is also possible to pass a sheet-like material to the printing unit.

  In the present embodiment, the second printing unit is configured by the number cylinder 25, the ink supply device 26, and the like. However, the second printing unit is configured by a general plate cylinder or an ink supply device that prints a normal pattern. It is also possible to do.

  In the present embodiment, the double impression cylinder 22 is applied, but an impression cylinder having a cylinder diameter of three times or more can also be applied. When the impression cylinder is a double cylinder, the line connecting the contact position of the first printing section with the impression cylinder and the axis of the impression cylinder and the contact position of the impression cylinder 22 of the number printing section The angle formed with the line connecting the axial center of the impression cylinder is 180 ° or less.

1 is an overall schematic configuration diagram of an embodiment of a printing machine according to the present invention. It is an extraction enlarged view of the principal part of FIG. It is the whole schematic block diagram of other embodiment of the printing machine by this invention. FIG. 4 is an enlarged view of essential parts of FIG. 3. It is a whole schematic block diagram of an example of the conventional printing machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Paper feed part 11 Paper stack 12 Feeder board 13 Swing apparatus 20 Printing part 21a, 21b Transfer cylinder 22 Impression cylinder 23 Seal cylinder 24 Ink supply apparatus 25, 27 Number cylinder 26, 28 Ink supply apparatus 29 Paper discharge cylinder 30 Paper discharge Portions 31, 32 Sprocket 33 Paper discharge chain 35a, 35b Pile 100 sheets

Claims (1)

A rotatable impression cylinder having a plurality of effective surfaces of _a length La holding a sheet-like material whose length in the transport direction of the printing surface is L ₀ at regular intervals along the circumferential direction;
A first printing section that contacts the impression cylinder so as to be able to approach and separate, and prints the sheet-like material;
A second printing section that makes contact with the impression cylinder so as to be able to approach and leave the impression cylinder on the downstream side in the rotation direction of the impression cylinder with respect to the contact position of the first printing section with respect to the impression cylinder; and
A number printing unit that makes contact with the impression cylinder so as to be able to approach and separate from the contact position of the second printing unit with respect to the impression cylinder on the downstream side in the rotation direction of the impression cylinder, and performs number printing on the sheet-like material;
A printing cylinder comprising: a conveyance cylinder that is in contact with the impression cylinder at a downstream side in the rotation direction of the impression cylinder with respect to the contact position of the number printing unit with respect to the impression cylinder and that receives the sheet-like material from the impression cylinder. ,
Conveyance distance L ₁ is shaped such sheets of the by the impression cylinder sheet between Taise' position between Taise' position and the impression cylinder of the second printing portion and the impression cylinder of the first printing unit a length in the transport direction of the printing surface of the object L ₀ or more lengths (L ₁ ≧ L _0),
Printing conveyance distance L ₂ of the sheet according to the impression cylinder between a Taise' position between the impression cylinder of the transport cylinder and Taise' position between the impression cylinder of the number printing portion of the sheet The surface has a length L ₀ or more in the transport direction (L ₂ ≧ L ₀ ),
Next conveyance distance L ₃ of the sheet according to the impression cylinder between a Taise' position between the impression cylinder Taise' position and the number printing portion and the impression cylinder of the first printing unit of the impression cylinder So as to have a length (L ₃ ≦ L _a + 2L _b ) equal to or less than the total length of twice the length L _b between the matching effective surfaces and the length L _{a of the} effective surfaces
The first printing unit, the second printing unit, the number printing unit and the transport cylinder are disposed, respectively.
When the number printing unit causes number printing failure, the first printing unit, the second printing unit, and the number printing unit are separated from the impression cylinder so as to be immediately retracted. Printing machine to do.

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