JP4625286B2 - Coating equipment - Google Patents

Description

  The present invention relates to a coating apparatus that is provided between a printing unit of a sheet-fed rotary printing press and a paper discharge device, or in an independent varnishing machine, and applies a varnish to a printed surface of paper after printing.

The conventional coating apparatus includes a rubber impression cylinder facing the impression cylinder of the final printing unit, a first varnish coating means for coating the printed paper back surface, and a second coating for coating the printed paper surface. And varnish coating means. The first varnish coating means includes a first varnish film forming cylinder facing the rubber impression cylinder, an anilox roller facing the first varnish film forming cylinder, and a chamber coater for supplying varnish to the anilox roller. Become. Therefore, the varnish supplied from the chamber coater to the anilox roller is transferred to the peripheral surface of the rubber impression cylinder through the first varnish film forming cylinder. The second varnish coating means includes a rubber cylinder facing the rubber cylinder, a second varnish film forming cylinder facing the rubber cylinder, an anilox roller facing the second varnish film forming cylinder, and the anilox It consists of a chamber coater that supplies varnish to the rollers. Therefore, the varnish supplied from the chamber coater to the anilox roller is transferred to the rubber cylinder through the second varnish film forming cylinder, and is applied to the surface of the printed paper passing through the opposite point of the rubber cylinder and the rubber impression cylinder. Coated. When the paper passes through the opposite point between the rubber cylinder and the rubber impression cylinder, it is transferred from the first varnish film forming cylinder of the first varnish coating means to the peripheral surface of the rubber impression cylinder by the printing pressure of the rubber cylinder. Varnish is coated on the back side of the printed paper (see, for example, Patent Document 1). In addition, the applicant could not find any prior art documents closely related to the present invention by the time of filing other than the prior art documents specified by the prior art document information described in the present specification. .
JP 2003-182031 A (paragraphs “0016” to “0018”, FIG. 2)

In the conventional coating apparatus described above, immediately after the start of coating, the amount of varnish supplied from the first varnish coating unit to the rubber cylinder and the amount of varnish supplied to the rubber cylinder of the second varnish coating unit. May become unstable without being stable. In this state, when the first paper passes between the rubber cylinder and the impression cylinder, the varnish is already dried when the printing pressure is applied from the rubber cylinder, the paper sticks to the blanket, and the paper There was a problem that the machine was broken due to the nail being removed or damaged. This is because when the blanket such as the rubber impression cylinder of the coating unit is cleaned with a predetermined number of sheets after the coating is completed, the same problem occurs due to the insufficient amount of varnish.

  The present invention has been made in view of the above-described conventional problems, and its purpose is to prevent sheet-like material damage and machine failure due to varnish drying occurring immediately after the start of coating and at the end of coating. There is to do.

To achieve this object, the invention according to claim 1 is directed to a varnish supply means for supplying varnish, at least one varnish supply cylinder to which varnish is supplied from the varnish supply means, and facing the varnish supply cylinder. In a coating apparatus that includes an impression cylinder and coats varnish on a sheet-like material held and conveyed by the impression cylinder, the varnish supply cylinder or the impression cylinder is provided with a varnish drying prevention liquid that prevents drying of the varnish. e Bei a liquid supply means for supplying, to the sheet material passing between the varnish supply cylinder and the impression cylinder, the viscosity by the varnish anti-drying liquid is intended to coat the varnish was reduced.

The invention according to claim 2 is the invention according to claim 1, wherein the varnish drying prevention liquid prevents the sheet-like material from sticking to the varnish supply cylinder or the impression cylinder .

  The invention according to claim 3 is the invention according to claim 1, wherein a printing cylinder facing the impression cylinder is provided, and the varnish supplied from the varnish supply cylinder to the impression cylinder is the printing cylinder and the impression cylinder. It is coated on a sheet-like material passing between the two.

The invention according to claim 4 is the invention according to claim 1 , wherein the liquid supply means is for preventing varnish drying on the varnish that coats the first sheet-like material passing between the impression cylinder and the varnish supply cylinder. It supplies liquid.

According to a fifth aspect of the present invention, in the first aspect of the invention, the liquid supply means includes a varnish that coats the first sheet-like material that passes between the impression cylinder and the varnish supply cylinder. Alternatively, the varnish drying prevention liquid is supplied in advance before being supplied to the impression cylinder.

The invention according to claim 6 is the invention according to claim 1 , wherein the liquid supply means is configured such that the last sheet-like material passing between the impression cylinder and the varnish supply cylinder is the impression cylinder and the varnish supply cylinder. The liquid for preventing varnish drying is supplied after the supply from the varnish supply means is completed before passing between the two.

  The invention according to claim 7 is the invention according to claim 3, wherein the liquid supply means is for preventing varnish drying on the varnish for coating the first sheet-like material passing between the impression cylinder and the impression cylinder. It supplies liquid.

  According to an eighth aspect of the present invention, in the invention according to the third aspect, the liquid supply means includes a varnish for coating a first sheet-like material passing between the impression cylinder and the impression cylinder. Alternatively, the varnish drying prevention liquid is supplied in advance before being supplied to the impression cylinder.

  The invention according to claim 9 is the invention according to claim 3, wherein the liquid supply means is configured such that the last sheet-like material passing between the impression cylinder and the impression cylinder is the impression cylinder and the impression cylinder. The liquid for preventing varnish drying is supplied after the supply from the varnish supply means is completed before passing between the two.

According to the present invention, the varnish drying preventing liquid for preventing the drying of the varnish is supplied immediately after the start of the varnish supply where the varnish supply is insufficient or immediately before and at the end of the supply of the varnish. Since sticking to the blanket can be prevented, damage to the sheet-like material and machine failure can be prevented in advance.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a sheet-fed rotary printing press provided with a coating apparatus according to the present invention, and FIG. 2 is an arrangement diagram of rollers of the sheet-fed rotary printing press, showing a state immediately after the start of coating and at the end. 3 is an arrangement diagram of rollers of a sheet-fed rotary printing press, showing a state at the end of coating, FIG. 4 is a side view of the cylinder attaching / detaching device, and FIG. 5 is a side view of the main part.

  In FIG. 1, a sheet-fed rotary printing press denoted as a whole by reference numeral 1 includes a paper feeding unit 2 that feeds paper as a sheet-like material, a printing unit 3 that prints fed paper, and printed paper. The coating unit 4 coats the varnish on the front and back surfaces, and the paper discharge unit 5 that discharges the coated paper. The printing unit 3 includes four first to fourth front surface printing units 6A to 6D and four first to fourth back surface printing units 7A to 7D. The four surface printing units 6A to 6D have a double-diameter impression cylinder 10a provided with a nail that holds paper on the circumferential surface, a rubber cylinder 11a opposed to the upper part of the impression cylinder 10a, and the rubber cylinder 11a. A plate cylinder 12a opposed to the upper part, an ink portion 13a for supplying ink to the plate cylinder 12a, and a water supply device 14a for supplying water to the plate cylinder 12a are provided. The four back surface printing units 7A to 7D each have a double-diameter impression cylinder 10b provided with a nail that holds paper on the peripheral surface, a rubber cylinder 11b facing the lower part of the impression cylinder 10b, and the rubber cylinder 11b. A plate cylinder 12b opposed to the lower part, an ink portion 13b for supplying ink to the plate cylinder 12b, and a water supply device 14b for supplying water to the plate cylinder 12b are provided.

  In such a configuration, the leading edge of the paper supplied from the paper supply unit 2 to the feeder board 15 is added to the swing device 16 and is passed through the transfer cylinder 17 to the nail of the impression cylinder 10a of the first front surface printing unit 6A. In addition, the first color is printed on the surface when passing through the opposite point between the impression cylinder 10a and the rubber cylinder 11a. Next, the paper having the first color printed on the front surface is replaced with the pressure drum 10b of the first back surface printing unit 7A, and when the first color passes on the opposite point between the pressure drum 10b and the rubber drum 11b, the first color is printed on the back surface. Printed. The paper on which the four colors are printed on the front and back surfaces by the second to fourth front surface printing units 6B to 6D and the second to fourth back surface printing units 7B to 7D in sequence is displayed by the coating unit 4 as will be described later. Varnish is coated on the back. The coated paper is replaced by a paper discharge claw (not shown) of the paper discharge chain 19 of the paper discharge unit 5, transported by the paper discharge chain 19, and then dropped and stacked on the paper discharge pile 20. .

  In FIG. 2, reference numeral 22 denotes a sensor provided at the front end of the feeder board 15 that detects the presence or absence of paper on the feeder board 15. The coating unit 4 includes a rubber impression cylinder 24 as an impression cylinder facing the impression cylinder 10b of the final back-side printing unit 7D, first varnish coating means 25 for coating the back side of the printed paper, and printed paper. And a second varnish coating means 26 for coating the surface.

  The first varnish coating means 25 includes a first varnish film forming cylinder 27 as a varnish supply cylinder facing the rubber impression cylinder 24 on the upstream side in the paper conveying direction from the opposing point of the rubber impression cylinder 24 and the impression cylinder 10b. The first anilox roller 28 serving as a varnish supplying means facing the first varnish film forming cylinder 27 and a chamber coater 29 for supplying varnish to the first anilox roller 28 are configured. Therefore, the varnish supplied from the chamber coater 29 to the first anilox roller 28 is transferred to the peripheral surface of the rubber impression cylinder 24 via the first varnish film forming cylinder 27.

  The second varnish coating means 26 includes a rubber cylinder 30 as a varnish supply cylinder facing the rubber impression cylinder 24 on the downstream side in the paper conveying direction from a point where the rubber impression cylinder 24 and the impression cylinder 10b are opposed, and the rubber cylinder 30 A second varnish film forming cylinder 31 as an opposing varnish supply cylinder, a second anilox roller 32 as a varnish supply means facing the second varnish film forming cylinder 31, and the second anilox roller 32 It is comprised from the chamber coater 33 which supplies a varnish. Accordingly, the varnish supplied from the chamber coater 33 to the second anilox roller 32 is transferred to the rubber cylinder 30 via the second varnish film forming cylinder 31, and the opposite point between the rubber cylinder 30 and the rubber impression cylinder 24 is changed. It is coated on the surface of the printed paper that passes. When the paper passes through the opposite point between the rubber cylinder 30 and the rubber impression cylinder 24, the rubber impression cylinder is moved from the first varnish film forming cylinder 27 of the first varnish coating means 25 by the printing pressure of the rubber cylinder 30. The varnish transferred to the peripheral surface of 24 is coated on the back surface of the printed paper.

  Next, referring to FIG. 4, the first varnish coating means 25 in the first varnish film forming cylinder 27, the cylinder detaching apparatus for performing cylinder removal, and the second varnish coating means 26 in the rubber cylinder 30. Next, a cylinder attachment / detachment apparatus for performing cylinder removal will be described. Since these cylinder attaching / detaching apparatuses have the same structure, only the cylinder attaching / detaching apparatus 40 for inserting and removing the rubber cylinder 30 will be described in detail, and the cylinder attaching / detaching apparatus for inserting and removing the rubber cylinder 27 will be described. The outline will be described as necessary.

  Both end shafts of the rubber impression cylinder 24 and the second varnish film forming cylinder 31 are rotatably supported by a frame 39 via a bearing (not shown). Further, both end shafts 30 a of the rubber body 30 are rotatably supported by eccentric bearings 41 (described later) fitted to the left and right frames 39. A bracket 43 is supported on a stud 42 that protrudes outward from the frame 39 on one side in the vicinity of the end shaft of the rubber impression cylinder 24, and a stepping motor 44 as a drive device is supported on the bracket 43. The drive rod 45 is fixed upright. By driving the stepping motor 44 and rotating the nut 44a, the drive rod 45 having a threaded portion engaged with the nut 44a is configured to move up and down. A connecting lever 47 formed in an L shape when viewed from the front is pivotally mounted on the protruding portion of the lever shaft 46 positioned above the drive rod 45 and supported at both ends by the left and right frames 39.

  The eccentric bearing 41 includes an outer ring fitted to the housing via needle rollers and an inner ring (fitted to the outer ring) rotatably connected to the housing through needle rollers. (Not shown). The bearing lever 48 fixed to the outer ring of the eccentric bearing 41 and the connecting lever 47 are connected by a rod 49, and the driving rod 45 is advanced and retracted by the driving of the stepping motor 44. Further, the eccentric bearing 41 is configured to rotate through the bearing lever 48.

  The axis of the inner peripheral surface of the inner ring constituting the eccentric bearing 41 and the axis of the outer peripheral surface of the outer ring of the eccentric bearing 41 are eccentric from each other by a predetermined dimension. In other words, when the rod 45 of the stepping motor 44 is retracted from the state in which the rubber cylinder 30 is inserted, the axis of the inner peripheral surface of the inner ring moves around the axis of the outer peripheral surface of the outer ring. As a result, a gap is formed between the rubber cylinder 30 and the rubber impression cylinder 24, and the cylinder is removed. The rubber cylinder 30 and the second varnish film forming cylinder 31 are maintained in a state in which their peripheral surfaces are opposed to each other. On the other hand, an eccentric bearing (not shown) of the first varnish film forming cylinder 27 of the first varnish coating means 25 is also provided with the same mechanism for rotating the eccentric bearing by being driven by the stepping motor 44. Yes. Therefore, also in the rubber cylinder 27 of the first varnish coating means 25, a gap is formed between the rubber cylinder 27 and the rubber impression cylinder 24 by rotating the stepping motor 44 and rotating the eccentric bearing. Is done.

  Next, referring to FIG. 2, the cylinder of the first anilox roller 28 of the first varnish coating means 25 and the cylinder attachment / detachment apparatus for performing cylinder removal and the cylinder of the second anilox roller 32 of the second varnish coating means 26. A cylinder attaching / detaching apparatus for inserting and removing a cylinder will be described. The first anilox roller 28 is rotatably supported on the frame 39 via an eccentric bearing 28a, and a bearing lever 53A is fixed to the outer ring of the eccentric bearing 28a. The swing end of the bearing lever 53A is pivotally attached to a rod 52A of an air cylinder 51A having a cylinder end pivotally attached to the frame 39. Therefore, when the air cylinder 51A is operated and the rod 52A is advanced, the eccentric bearing 28a rotates counterclockwise in the drawing via the bearing lever 53A, so that the first anilox roller 28 and the first varnish film A gap is formed between the forming cylinder 27 and the cylinder is removed. On the other hand, by operating the air cylinder 51A and retracting the rod 52A, the eccentric bearing 28a is rotated clockwise through the bearing lever 53A, and the first anilox roller 28 is moved to the first varnish film forming cylinder. The body is placed in opposition to 27.

  The second anilox roller 32 is rotatably supported on the frame 39 via an eccentric bearing 32a, and a bearing lever 53B is fixed to the outer ring of the eccentric bearing 32a. The swinging end of the bearing lever 53B is pivotally attached to a rod 52B of an air cylinder 51B having a cylinder end pivotally attached to the frame 39. Therefore, by operating the air cylinder 51B and moving the rod 52B forward, the eccentric bearing 32a is rotated clockwise through the bearing lever 53B to form the second anilox roller 32 and the second varnish film. A gap is formed between the body 31 and the body is removed. On the other hand, by operating the air cylinder 51B and retracting the rod 52B, the eccentric bearing 32a is rotated counterclockwise through the bearing lever 53B, and the second anilox roller 32 forms the second varnish film. The case 31 is placed opposite to the case 31. The printing apparatus described above is not particularly different from a conventionally known coating apparatus for a sheet-fed rotary printing press.

  A feature of the present invention is that the first varnish film is supplied to the varnish supplied to the first varnish film forming cylinder 27 and the rubber cylinder 30 immediately after the start of coating or at the end of the coating, or before the varnish is supplied. This is in that a spray nozzle is provided as a liquid supply means for supplying water to the forming cylinder 27 and the rubber cylinder 30.

  That is, as shown in FIG. 5, a stay 56 </ b> A in which a plurality of spray nozzles 55 </ b> A are supported at equal intervals so as to face the first varnish forming cylinder 27 is horizontally mounted between the left and right frames 39. Similarly, as shown in FIG. 2, a stay 56 </ b> B, in which a plurality of spray nozzles 55 </ b> B as liquid supply means are supported at equal intervals so as to face the rubber cylinder 30, is horizontally mounted between the left and right frames 39, 39. Yes. When air is supplied to these spray nozzles 55A and 55B, water as the mist-like varnish drying preventing liquid is supplied to the first varnish film forming cylinder 27 and the rubber cylinder 30 together with the supplied air, for example, It is configured to be repeatedly sprayed for about 0.1 to 1 second.

With this configuration, when printing is started and the first sheet is fed from the sheet feeder 2 to the feeder board 15 and detected by the sensor 22, the rubber cylinders 11a of the printing units 6A to 6D are detected. The rubber cylinder 11a of each printing unit 7A to 7D is put into a cylinder, printing is performed on the surface of the paper conveyed through each printing unit 6A to 6D, and printing is performed on the back surface of the paper conveyed through each printing unit 7A to 7D. Applied. Immediately before the printed paper is conveyed to the coating unit 4, the stepping motor 44 is operated in accordance with a command from a control device (not shown), and the first varnish film forming cylinder 27 is moved to the rubber impression cylinder 24. In addition, the rubber cylinder 30 is inserted into the rubber impression cylinder 24. At the same time, the air cylinder 51 </ b> A is operated to insert the first anix roller 28 into the first varnish film forming cylinder 27 and the air cylinder 51 </ b> B is operated to operate the second varnish film forming cylinder 31. Then, the second anix roller 32 is inserted into the body. Therefore, the varnish supplied from the chamber coater 29 to the first anilox roller 28 is supplied to the first varnish film forming cylinder 27. At the same time, the varnish supplied from the chamber coater 33 to the second anilox roller 32 is supplied to the rubber cylinder 30 via the second varnish film forming cylinder 31.

At this time, air is repeatedly supplied to the spray nozzle 55A for about 0.1 to 1 second according to a command from a control device (not shown), and air is blown into the varnish supplied to the first varnish film forming cylinder 27. Mist water is supplied from the spray nozzle 55A. At the same time, air is repeatedly supplied to the spray nozzle 55B for about 0.1 to 1 second, and spray water is supplied from the spray nozzle 55B to the varnish supplied to the rubber cylinder 30. That is, water is supplied to the varnish that coats the first paper. In this way, the viscosity of the varnish is reduced by supplying water to the varnish immediately after the start of varnish film formation in which a sufficient thickness of the varnish film is not formed on the peripheral surface of the rubber cylinder 30. For this reason, it is possible to prevent drying of the varnish even though the first paper passes through the opposing point of the rubber impression cylinder 24 and the rubber cylinder 30 and the varnish coated on the front and back of the paper is still thin . Accordingly, it is possible to prevent the paper conveyed by the gripping claws of the rubber impression cylinder 24 from being damaged due to the paper sticking to the blanket of the rubber impression cylinder 24 and the rubber cylinder 30. In addition, it is possible to prevent the machine from being damaged due to the paper coming off from the gripping claw of the rubber impression cylinder 24 or the dropped paper.

  In this embodiment, an example in which water is supplied to the first varnish film forming cylinder 27 by the atomizing nozzle 55A has been shown. However, the peripheral surface of the rubber impression cylinder 24, that is, the rubber impression cylinder 24 and the rubber cylinder 30 are shown. Water may be supplied to a range from the opposite point to the opposite point between the rubber impression cylinder 24 and the first varnish film forming cylinder 27 on the upstream side in the paper conveyance direction. Moreover, although the example which supplies water from the spray nozzle 55A to the varnish supplied to the 1st varnish film formation cylinder 27 and the rubber cylinder 30 was shown, a varnish is supplied to the 1st varnish film formation cylinder 27 and the rubber cylinder 30 Prior to this, water may be supplied to the first varnish film forming cylinder 27 and the rubber cylinder 30 from the spray nozzles 55A and 55B in advance. Therefore, the varnish for coating the first paper is supplied from the first anilox roller 28 and the second varnish film forming cylinder 31 to the first varnish film forming cylinder 27 and the rubber cylinder 30 to which water is supplied in advance. However, the viscosity of the varnish is lowered by water. For this reason, drying of the varnish can be prevented even though the varnish film having a sufficient film thickness is not formed on the peripheral surfaces of the first varnish film forming cylinder 27 and the rubber cylinder 30. Therefore, also in these embodiments, similarly to the above-described embodiments, it is possible to prevent paper damage caused by drying of the varnish and separation of the paper rubber impression cylinder 24 from the holding claws.

  Next, an operation when the rubber impression cylinder 24 is cleaned with a predetermined number of sheets before the last sheet supplied from the sheet feeder 2 will be described with reference to FIG. When the paper feeding from the paper feeding device 2 is completed and the last paper is replaced by the nail of the transfer drum 17 from the swing device 16, the sensor 22 detects that there is no paper. By this detection, the air cylinders 51A and 51B are operated, the first anilox roller 28 is separated from the first varnish film forming cylinder 27, and the second anilox roller 32 is moved to the second varnish film. The drum is removed away from the forming cylinder 31.

  When the barrel removal is completed, air is supplied to the spray nozzles 55A and 55B, and spray water is supplied from the spray nozzles 55A and 55B to the first varnish film forming cylinder 27 and the rubber cylinder 30. Further, in each of the printing units 6A to 6D and each of the printing units 7A to 7D, the rubber cylinders 11a and 11b are removed from the impression cylinders 10a and 10b when the last sheet sequentially passes.

When a predetermined number of sheets of paper from the last sheet passes between the rubber cylinder 14 and the rubber cylinder 30, the varnish supplied to the rubber cylinder 24 is adsorbed by the paper and cleaned. At this time, the film thickness of the varnish on the rubber impression cylinder 24 becomes thinner, but the viscosity of the varnish is lowered by the water supplied from the spray nozzles 55A and 55B. For this reason, the drying of the varnish can be prevented, and the paper for cleaning does not stick to the blanket of the rubber impression cylinder 24. Therefore, the paper comes off from the gripping nail of the rubber impression cylinder 24. , Can prevent paper breakage.

  FIG. 6 is an arrangement diagram of rollers of a coating apparatus showing a second embodiment of the present invention. The second embodiment is characterized in that varnish collection tanks 60A and 60B are provided corresponding to the first varnish film forming cylinder 27 and the rubber cylinder 30, respectively. That is, the varnish collection tanks 60A and 60B have a tip that can freely contact and separate from the peripheral surfaces of the first varnish film forming cylinder 27 and the rubber cylinder 30, and thereby face the first varnish film forming cylinder. Doctors 61 </ b> A and 61 </ b> B are provided for collecting the varnish remaining on the peripheral surfaces of 27 and the rubber cylinder 30 in the varnish collection tanks 60 </ b> A and 60 </ b> B.

  With this configuration, as described above, when the rubber impression cylinder 24 is cleaned with a predetermined number of sheets before the last sheet supplied from the sheet feeding device 2, the rubber impression cylinder 24 is cleaned with the last sheet. Even after the completion, water is supplied from the spray nozzles 55 </ b> A and 55 </ b> B to the first varnish film forming cylinder 27 and the rubber cylinder 30. Therefore, the varnish remaining on the peripheral surfaces of the rubber impression cylinder 24, the first varnish film forming cylinder 27, the rubber cylinder 30 and the second varnish film forming cylinder 31 is washed with water by the supplied water, and the doctors 61A and 61B It is recovered in the varnish recovery tanks 60A and 60B. That is, these cylinders can be automatically cleaned by the water supplied from the spray nozzles 55A and 55B to the first varnish film forming cylinder 27 and the rubber cylinder 30 in order to reduce the viscosity of the varnish.

  In this embodiment, an example of a coating apparatus that coats both front and back surfaces of paper has been described. However, the present invention can also be applied to a coating apparatus that coats one side. Further, although the varnish supply cylinder of the second varnish coating means 26 is two, the rubber cylinder 30 and the second varnish film forming cylinder 31, it may be one like the first varnish coating means 25, It is good also as three or more. Further, although water is sprayed from the spray nozzles 55A and 55B, an ethylene glycol solvent which is a varnish drying retarder may be sprayed. Further, although the spray nozzle 50B is opposed to the rubber cylinder 30, the water may be supplied to the second varnish film forming cylinder 31 by facing the second varnish film forming cylinder 31. Further, as a varnish coating unit, the varnish is supplied from the chamber coaters 29 and 33 to the anilox rollers 28 and 32. However, the varnish is pulled up by a former roller that immerses a part of the peripheral surface in the varnish in the varnish boat. May be. In the present embodiment, the coating apparatus is a coating unit provided between the printing unit 3 and the paper discharge unit 5 of the sheet-fed rotary printing press, but as a coating unit provided in an independent varnishing machine or the like. Also good. Further, in the present embodiment, in the double-side coating apparatus, a rubber impression cylinder wound with rubber is used as the impression cylinder. However, in the case of a single-side coating apparatus, an impression cylinder may be used. Moreover, although paper was used as the sheet-like material, it may be a vinyl chloride sheet.

It is a side view of the sheet-fed rotary printing press provided with the coating apparatus which concerns on this invention. It is an arrangement | sequence diagram of the roller of the sheet-fed rotary printing press provided with the coating apparatus which concerns on this invention, Comprising: The coating start state is shown. It is an arrangement | sequence figure of the roller of the sheet-fed rotary printing press provided with the coating apparatus based on this invention, Comprising: The state at the time of completion | finish of coating is shown. It is a side view of the trunk | drum attachment / detachment apparatus in the coating apparatus which concerns on this invention. It is a side view of the principal part in the coating apparatus which concerns on this invention. It is the arrangement | sequence diagram of the roller of the coating apparatus which shows the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Sheet-fed rotary printing machine, 2 ... Paper feeder, 3 ... Printing part, 4 ... Coating unit, 22 ... Sensor, 24 ... Rubber impression cylinder, 25 ... 1st varnish coating means, 26 ... 2nd varnish coating Means 27 ... first varnish film forming cylinder (varnish supplying cylinder), 28, 32 ... first anilox roller, 29, 33 ... chamber coater, 30 ... rubber cylinder (varnish supplying cylinder), 31 ... second varnish Film forming cylinder (varnish supply cylinder), 40 ... cylinder attaching / detaching device, 41 ... eccentric bearing, 51A, 51B ... air cylinder, 55A, 55B ... spray nozzle, 60A, 60B ... varnish collection tank.

Claims (9)

A varnish supplying means for supplying a varnish, at least one varnish supplying cylinder to which the varnish is supplied from the varnish supplying means, and a pressure cylinder facing the varnish supplying cylinder, are held and conveyed by the pressure cylinder. In a coating device that coats varnish on a sheet,
The varnish supply cylinder or the impression cylinder, Bei give a liquid supply means for supplying a varnish anti-drying liquid to prevent drying of the varnish,
A coating apparatus , wherein a sheet-like material passing between the varnish supply cylinder and the impression cylinder is coated with a varnish whose viscosity is reduced by the liquid for preventing varnish drying .   The coating apparatus according to claim 1.
  A coating apparatus for preventing sticking of a sheet-like material to the varnish supply cylinder or the impression cylinder with the varnish drying prevention liquid. The coating apparatus according to claim 1.
A printing cylinder facing the impression cylinder is provided, and the varnish supplied from the varnish supply cylinder to the impression cylinder is coated on a sheet-like material passing between the impression cylinder and the impression cylinder. Coating equipment. The coating apparatus according to claim 1 .
The liquid supply means supplies a varnish drying preventing liquid to a varnish for coating an initial sheet-like material passing between the impression cylinder and the varnish supply cylinder. The coating apparatus according to claim 1 .
The liquid supply means is a liquid for preventing varnish drying before the varnish to be coated on the first sheet-like material passing between the impression cylinder and the varnish supply cylinder is supplied to the varnish supply cylinder or the impression cylinder. A coating apparatus characterized by supplying The coating apparatus according to claim 1 .
The liquid supply means is supplied from the varnish supply means before the last sheet-like material passing between the impression cylinder and the varnish supply cylinder passes between the impression cylinder and the varnish supply cylinder. A coating apparatus for supplying a liquid for preventing varnish drying after completion. The coating apparatus according to claim 3.
The liquid supply means supplies the liquid for preventing varnish drying to the varnish for coating the first sheet-like material passing between the impression cylinder and the impression cylinder. The coating apparatus according to claim 3.
The liquid supply means is a liquid for preventing varnish drying in advance before the varnish to be coated on the first sheet-like material passing between the impression cylinder and the impression cylinder is supplied to the impression cylinder or the impression cylinder. A coating apparatus characterized by supplying The coating apparatus according to claim 3.
The liquid supply means is supplied from the varnish supply means before the last sheet-like material passing between the impression cylinder and the impression cylinder passes between the impression cylinder and the impression cylinder. A coating apparatus for supplying a liquid for preventing varnish drying after completion.

Images