JP2003182030A - Printing machine drying equipment - Google Patents

Abstract

(57) [Summary] (With correction) [Problem] Drying of a printing press that enables stable conveyance of paper to improve quality, and also avoids upsizing of the apparatus to facilitate maintenance and reduce costs. Provide equipment. SOLUTION: A transport chain 17 for transporting a sheet W printed by a printing section 2 from the printing section 2 to a paper discharge section 3 while holding a front end thereof, and transporting the sheet W held by the transport chain 17 In a drying device of a printing press provided with an ultraviolet curing drying device 20 for drying ink printed on a printing surface of a sheet W to be printed, the transport chain 17 that transports the sheet W in a horizontal direction; An ultraviolet curing drying device 20 provided below the transport path of the transport chain 17; and a vacuum table 21 provided above the transport path of the transport chain 17 for sucking the transported sheet W. And with.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying device for a printing machine, which is provided with an ultraviolet curing drying device in a conveyance path for printed paper.

[0002]

2. Description of the Related Art As an intaglio printing machine provided with a drying device for ultraviolet curing in a conveyance path of a printed paper, as disclosed in JP-A-11-58688. In some cases, a vertical transport unit for a drying device is provided in the middle of the transport path, and an ultraviolet ray is applied to the printing surface of the paper by an irradiator installed in that portion to dry the UV curable ink.

However, in the above-mentioned drying device,
The provision of the vertical transport unit raises the height of the entire printing machine, requires an extra space, makes maintenance of the vertical transport unit difficult, and places a burden on the operator. In addition, there is a problem that the cost becomes high because a dedicated vertical transport unit must be provided.

Further, since only the front end of the paper is carried in the carrying path in a state where it is held by the nail rod, if it is a vertical carrying section, it rises against gravity and then descends with gravity applied. Therefore, there is a problem in that the bottom of the paper flaps, and the print surface is scratched or soiled. In addition, since the ink printed with UV-curable ink curves greatly from the horizontal transport section to the vertical transport section before it dries, the paper flaps on the easily scratched printing surface before the ink dries, which causes printing. There were also problems such as scratches or stains on the surface.

Further, in the vertical conveyance section, cooling air is blown from the jet nozzle to press the paper against the cooling board to suppress the fluttering of the paper.
There was also a problem that the cooling air flowed between the paper and the cooling board, the fluttering of the paper could not be suppressed, the print surface was scratched or soiled, and uneven drying occurred.

[0006] Therefore, a dryer (ultraviolet-curing dryer) is provided above the conveying path of the nail rod, like a dryer for an ordinary commercial offset printer such as Japanese Utility Model Laid-Open No. 60-96038. Can be considered. However, in this case, Japanese Patent Application No. 2001-332 previously proposed by the present inventors.
Like No. 07, it is necessary to provide a dedicated transport unit such as an inspection unit, which increases the length of the entire printing machine, requires an extra space, and increases costs.

Further, in the drying device disclosed in Japanese Utility Model Laid-Open No. 60-96038, since the paper being conveyed is guided only by the paper guide, the paper being conveyed flutters and is not evenly dried. There is a problem in that the print surface is scratched or dirty as well as uneven.

When a drying device (ultraviolet curing drying device) is provided below the conveying path of the nail rod, as in the drying device of Japanese Utility Model Laid-Open No. 60-96038, a paper guide for supporting the paper is used. There is also a problem that it becomes an obstacle and it becomes impossible to dry the ink in the portion corresponding to the paper guide.

The present invention has been proposed in view of the above circumstances, and enables stable conveyance of paper to improve quality, while avoiding an increase in size of the apparatus to facilitate maintenance and reduce cost. It is an object of the present invention to provide a dryer for a printing machine.

[0010]

In order to solve the above-mentioned problems, a drying device for a printing machine according to the present invention discharges paper printed by a printing unit from the printing unit while holding its front end. In a drying device of a printing machine, which is provided with a conveying unit that conveys a sheet to a sheet and a drying unit that dries the ink printed on the printing surface of the sheet that is held and conveyed by the conveying unit, the sheet is conveyed in the horizontal direction. The transport means; the drying means provided below the transport path of the transport means; and the vacuum table provided above the transport path of the transport means for sucking the transported paper. Is characterized by.

Further, the drying means is provided so as to be drawn out in the lateral direction of the conveying means.

Further, the vacuum table is provided so as to be swingable upward.

Further, the carrying path of the carrying means is substantially horizontal in a range from the printing section to a portion corresponding to the drying means.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a drying apparatus for a printing machine according to the present invention will be described in detail with reference to the accompanying drawings with reference to the drawings.

[Embodiment] FIG. 1 is a side view showing the entire construction of a sheet-fed printing press showing an embodiment of the present invention, FIG. 2 is an enlarged side view showing an essential part of a drying section, and FIG. 3 is a sectional view showing a linear guide. FIG. 4 is an explanatory diagram of the vacuum table, and FIG. 5 is an explanatory diagram of the operation of the drying unit.

As shown in FIG. 1, the sheet-fed (intaglio) printing machine comprises a paper feed unit 1, a printing unit 2, a paper ejection unit 3 and a drying unit 4. In the paper feeding section 1, the stacked sheets (sheets) W are transferred one by one to the transfer cylinders 7 and 8 via the feeder board 5 and the swing device 6, and the transfer cylinder 8 transfers the three sheets of the printing section 2 to each other. It is designed to be delivered to the impression cylinder 9 of the double cylinder.

In the printing section 2, an intaglio cylinder 10 of a triple cylinder is located downstream of the transfer cylinder 8 of the impression cylinder 9 in the rotational direction.
Are facing each other. Three chablon cylinders 11 are in contact with the intaglio cylinder 10 at predetermined intervals in the circumferential direction on the downstream side of the impression cylinder 9 in the rotational direction. An inking unit 12 is in contact with each of these chablon cylinders 11.

Further, the pre-wiping device 1 is provided on the downstream side of the intaglio cylinder 10 with respect to the chablon cylinder 11 in the rotational direction.
3 are installed opposite to each other. Further, a wiping roller 14 is in contact with the intaglio cylinder 10 downstream of the pre-wiping device 13 in the rotational direction. The lower half of the wiping roller 14 is immersed in a wiping tank 15 containing a wiping liquid.

A delivery cylinder 16 is in contact with the impression cylinder 9 downstream of the intaglio cylinder 10 in the rotational direction, and a gripper device (not shown) for receiving the sheet W from the impression cylinder 9 is attached to the delivery cylinder 16. A plurality of conveyor chains (conveying means) 17 attached at predetermined intervals are wound around. The transport chain 17 travels while being guided by a chain guide (not shown), dries the sheet W received from the impression cylinder 9 with an air duct 18, and then passes through a drying unit 4 described later through a sheet stacking tray of a sheet discharging unit 3. It is designed to be transported on the 19th. The transport chain 17 is laid around the printing unit 2 and the drying unit 4 substantially horizontally.

As shown in FIG. 2, the drying section 4 is provided with an ultraviolet curing drying device (drying means) 20 for irradiating the printing surface of the sheet W with ultraviolet rays to dry the ultraviolet curing ink.
The transport chain 17 is arranged below the horizontal guide portion of the transport chain 17 along the transport direction so as to extend in two lines and faces the ultraviolet curing drying device 20.
A vacuum table 21 for sucking and guiding the sheet W is arranged on the upper side of the horizontal guide portion of 7.

As shown in FIG. 5, the ultraviolet curing drying device 20 is provided so as to be pulled out in the lateral direction of the transport chain 17 (printing machine frame 23) via a linear guide 22. As shown in FIG. 3, the linear guide 22 is an ordinary one in which a frame side attachment member 22a, an intermediate member 22b, and a dryer side attachment member 22c are slidably assembled with each other. In addition, 27 in FIG. 5 is a handle.

The vacuum table 21 is formed in a flat housing shape (see FIG. 2), and its bottom plate is formed of a perforated plate 21a having a large number of intake holes 21ab (see FIG. 4). And the internal chamber 2 of the vacuum table 21
1b (intake hole 21ab) is connected to a vacuum source (vacuum pump) (not shown) via a vacuum hose 24. In addition, the vacuum table 21
Is swingably provided upward via a hinge 25. In addition, reference numeral 26 in FIG. 2 denotes a stopper that regulates the swinging tip portion of the vacuum table 21.

In such an intaglio printing machine, the paper feed unit 1
When the sheet W is fed from the feeder board 5 to the feeder board 5, the sheet W is transferred to the transfer cylinder 7 by the swing device 6 and then transferred to the impression cylinder 9 via the transfer cylinder 8. On the other hand, when ink is supplied from the inking device 12 to the intaglio cylinder 10 via the chablon cylinder 11, the ink is retained by the impression cylinder 9 after the excess amount is removed by the pre-wiping device 13 and the wiping roller 14. It is transferred to the above-mentioned sheet W. The printed sheet W is transferred from the impression cylinder 9 to the delivery cylinder 1.
At 6, the transfer chain 17 is delivered to the gripper device, and then the transfer chain 17 travels along the chain guide to be transferred to the drying unit 4.

The sheet W conveyed in the drying section 4 is moved by the perforated plate 21a of the vacuum table 21 while being attracted to the perforated plate 21a to correct its posture.
At this time, the ultraviolet curing drying device 20 irradiates the printing surface of the sheet W with ultraviolet rays to dry the ultraviolet curing ink. The sheet W dried in this way leaves the vacuum table 21 and further travels, and is discharged onto the paper stacking table 19 of the paper discharge unit 3.

Further, in this embodiment, in addition to the transport chain 17 being laid around the printing unit 2 and the drying unit 4 substantially horizontally, the transport chain 1 is also provided.
Since the vacuum table 21 is arranged on the upper side of the horizontal guide portion 7 of the ultraviolet curable drying device 20, the flap W of the sheet W can be avoided and the sheet W can be stably conveyed. The quality can be improved.

The ultraviolet curing drying device 20 is
Since it is disposed below the transport chain 17 which is laid around substantially horizontally, it is possible to avoid an increase in the size of the apparatus (printing machine) and save space and cost. Further, since the vacuum table 21 is swingably provided upward via the hinge 25, maintenance of the vacuum table 21 becomes easy. Further, the ultraviolet curing drying device 20
Is provided so that it can be pulled out in the lateral direction of the transport chain 17 (printing machine frame 23) via the linear guide 22, so that maintenance of the drying device 20 for ultraviolet curing becomes easy.

Needless to say, the present invention is not limited to the above-mentioned embodiments, and various modifications can be made without departing from the gist of the present invention.

[0028]

As described above, according to the first aspect of the present invention, the conveying means for conveying the paper printed by the printing section from the printing section to the paper ejection section while holding the front end of the paper. In a drying device of a printing machine, comprising: a drying unit that dries ink printed on a printing surface of paper that is held and conveyed by the conveying unit, the conveying unit that horizontally conveys the paper, and the conveying unit. Since the drying means provided on the lower side of the transport path of and the vacuum table for suctioning the transported paper are provided on the upper side of the transport path of the transport means, stable transport of the paper is possible. As a result, the quality can be improved, maintenance of the device can be facilitated and the cost can be reduced by avoiding the increase in size of the device.

According to the second aspect of the invention, since the drying means is provided so as to be drawn out in the lateral direction of the conveying means, the maintenance of the drying means becomes easy.

According to the third aspect of the present invention, since the vacuum table is provided so as to be swingable upward, maintenance of the vacuum table becomes easy.

According to the invention of claim 4, the transport path of the transport means is substantially horizontal in the range from the printing section to the portion corresponding to the drying means, so that stable transport of paper is enabled. In addition to improving quality, it is possible to avoid an increase in size of the device and facilitate maintenance and reduce costs.

[Brief description of drawings]

FIG. 1 is a side view of the overall configuration of a sheet-fed printing press showing an embodiment of the present invention.

FIG. 2 is an enlarged side view of the main part of the drying section.

FIG. 3 is a sectional view of the linear guide of the same.

FIG. 4 is also an explanatory diagram of a vacuum table.

FIG. 5 is an explanatory view of the operation of the drying unit.

[Explanation of symbols]

1 Paper feeder 2 Printing department 3 Paper output section 4 drying section 5 feeder board 6 Swing device 7 Passage 8 passing body 9 impression cylinder 10 Intaglio cylinder 11 Chablon torso 12 Inking device 13 Pre-wiping device 14 Wiping roller 15 Wiping tank 16 delivery torso 17 Transport chain 18 air ducts 19 paper stacks 20 UV curing dryer 21 vacuum table 22 Linear guide 23 printing press frame 24 Vacuum Horse 25 hinges 26 Stopper W sheet

Claims (4)

[Claims] 1. Conveying means for conveying the paper printed by the printing section while holding its front end portion and conveying it from the printing section to the discharge section, and a printing surface of the paper held and conveyed by the conveying means. A drying device for drying the printed ink; and a transporting device for transporting paper in a horizontal direction in a drying device of a printing machine comprising: a drying device provided below a transport path of the transporting device. A vacuum table which is provided on the upper side of the transport path of the transport means and which sucks the transported paper, the drying device of the printing machine. 2. The drying device for a printing press according to claim 1, wherein the drying means is provided so as to be pulled out in a lateral direction of the conveying means. 3. The drying device for a printing press according to claim 1, wherein the vacuum table is provided so as to be swingable upward. 4. The drying device for a printing press according to claim 1, wherein the transport path of the transport means is substantially horizontal in a range from the printing section to a portion corresponding to the drying means.