Coating equipment

Abstract

To provide a coating device which can suppress a change in the posture of a varnish plate in which a gripper side end is inserted to a gripper side vice.SOLUTION: A coating device comprises: a varnish cylinder 1A around which a varnish plate supplied with varnish coated on a coating object material is wound; and a varnish impression cylinder which is arranged so as to be arranged opposed to the varnish cylinder 1A to transfer the varnish of the varnish plate 11 to the coating object material. The varnish cylinder 1A comprises: a gripper side vice 15 to which a gripper side end of the varnish plate 11 is inserted to hold it in order to wind the varnish plate 11 around the peripheral surface; and a tail side vice 16 to which a tail side end of the wound varnish plate 11 is inserted to hold it. The coating device includes a plate guide 17 which can switch between the pressing position that can press the varnish plate 11 in the state where the gripper side end is inserted to the gripper side vice 15 and the non-pressing position that does not press the varnish plate.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present invention relates to a coating apparatus for coating varnish on a material to be coated.

Background Art

[0002] Such a coating apparatus comprises: a varnish cylinder to which varnish for coating the printing surface of a material to be coated, for example a printed material, is supplied; and a varnish impression cylinder for conveying the printed material and pressing the varnish of the varnish cylinder against the conveyed printed material.

[0003] A varnish plate for coating varnish is manually mounted on the varnish cylinder. When mounting the varnish plate to the varnish cylinder, the grip-side end of the varnish plate is manually inserted into the grip-side vise in an open state, and then the grip-side vise is closed. However, if the posture of the varnish plate changes after the insertion of the varnish plate and before the grip-side vise is closed, the varnish plate will be in a lifted state. If the grip-side vise is closed and the varnish plate is mounted in this state, the varnish plate will be mounted on the varnish cylinder with wrinkles formed therein. Therefore, normally, when mounting a varnish plate, it is necessary to manually press the varnish plate against the varnish cylinder to align the varnish plate along the varnish cylinder side.

[0004] Particularly, in the case of a manually opening / closing type grip-side vise as disclosed in Patent Document 1, when a tool is used to close the grip plate relative to the vise base, the varnish plate cannot be pressed down by hand, so the possibility that the posture of the varnish plate changes and wrinkles are formed in the varnish plate increases. Furthermore, in a configuration where the grip plate is divided in the left-right direction and each divided grip plate is individually closed using a tool, after one of the left and right grip plates is closed, the other grip plate is closed, which further increases the possibility that wrinkles are formed in the varnish plate as described above.

Prior Art Literature

Patent Literature

[0005]

Patent Document 1

Summary of the Invention

[0006] The present invention was made to solve the above-mentioned problems, and aims to provide a coating device that can suppress changes in the posture of a varnish plate, the clamping end of which is inserted into the clamping vise. [Means for solving the problem]

[0007] To achieve the above objective, the coating apparatus according to the present invention comprises a varnish cylinder around which a varnish plate supplied with varnish to be coated onto a material to be coated is wound, and a varnish pressing cylinder positioned opposite the varnish cylinder for transferring the varnish from the varnish plate onto the material to be coated, wherein the varnish cylinder comprises a clamping vise for inserting and clamping the clamping end of the varnish plate in order to wind the varnish plate around its circumference, and a tail vise for inserting and clamping the tail end of the wound varnish plate, and is characterized by having a plate guide that can be switched between a pressing position in which the varnish plate can be pressed and a non-pressing position in which it is not pressed when the clamping end is inserted into the clamping vise.

[0008] According to the above configuration, when the plate guide is in the non-pressing position, the clamping end of the varnish plate is inserted into the clamping vise, and the inserted varnish plate is pressed by the plate guide, which has been switched from the non-pressing position to the pressing position, thereby holding the varnish plate taut in the clamping vise. This prevents the varnish plate from changing position and becoming loose while it is inserted into the clamping vise before it is closed. Therefore, it is possible to prevent the varnish plate from being attached to the varnish cylinder with wrinkles.

[0009] Furthermore, in the coating apparatus according to the present invention, the plate guide may be provided on the inner surface of an openable and closable cover that covers the varnish cylinder.

[0010] According to the above configuration, by providing a plate guide on the inner side of the openable cover that covers the varnish cylinder, a special component for providing the plate guide becomes unnecessary, thus reducing the number of parts.

[0011] Furthermore, in the coating apparatus according to the present invention, the cover may be configured to be openable and closable by rotation, and the plate guide may be switched from the non-pressed position to the pressed position by rotating the cover from the open state to the closed state by a predetermined angle.

[0012] With the above configuration, by rotating the cover from the open state to the closed state by a predetermined angle, the plate guide is switched from a non-pressing position to a pressing position, thereby ensuring that the varnish plate is reliably pressed by the plate guide.

[0013] Furthermore, the coating apparatus according to the present invention may be configured such that the plate guide can be repositioned between an operating position close to the varnish cylinder and a retracted position that is relatively further away from the varnish cylinder with respect to the operating position when the cover is open.

[0014] With the above configuration, the plate guide can be repositioned between an operating position close to the varnish cylinder and a retracted position relatively farther away from the varnish cylinder when the cover is open.

[0015] Furthermore, the coating apparatus according to the present invention may include a restricting member for restricting the movement of the plate guide toward the varnish cylinder when the cover is closed.

[0016] With the above configuration, the movement of the plate guide toward the varnish cylinder is restricted when the cover is closed, thus preventing the plate guide from unexpectedly moving and coming into contact with the varnish cylinder.

[0017] Furthermore, in the coating apparatus according to the present invention, the plate guide may be positioned along the inner surface of the cover in the retracted position.

[0018] According to the above configuration, if the plate guide is arranged along the inner surface of the cover at the retracted position, the installation space for the plate guide in the thickness direction of the cover can be reduced, and an increase in size of the coating apparatus can be suppressed.

[0019] Further, in the coating apparatus according to the present invention, a guide member for guiding the varnish plate wound around the varnish cylinder may be provided on an outer surface side of the cover.

[0020] According to the above configuration, when the varnish plate is wound, guiding the varnish plate by the guide member provided on the outer surface side of the cover can suppress the varnish plate from being damaged due to contact with surrounding members. Effects of the Invention

[0021] According to the present invention, it is possible to provide a coating apparatus capable of suppressing a change in posture of a varnish plate by pressing the varnish plate, whose grip-side end portion is inserted into a grip-side vise, with a plate guide switched from a non-pressing position to a pressing position. Brief Description of the Drawings

[0022] [Figure 1] It is an overall side view of a printing press incorporating the coating apparatus of the present invention. [Figure 2] It is a perspective view showing an upper portion of the coating apparatus of the present invention, with the cover closed. [Figure 3] It is a longitudinal sectional side view showing an upper portion of the coating apparatus, with the cover closed. [Figure 4] It is a longitudinal sectional side view showing an upper portion of the coating apparatus, with the cover opened. [Figure 5] It is a front view showing an upper portion of the coating apparatus, with the cover opened. [Figure 6] It is a perspective view showing an upper portion of the coating apparatus, with the cover opened. [Figure 7] It is a longitudinal side sectional view showing an upper portion of the coating apparatus, showing a state where a varnish plate is inserted into the grip-side vise. [Figure 8] This is a vertical cross-sectional view showing the top of the coating apparatus, illustrating the state in which the plate guide has been moved from the retracted position to the operating position, compared to the state in Figure 7. [Figure 9] This is a vertical cross-sectional view showing the top of the coating apparatus, illustrating the state in which the plate guide has been switched from the non-pressed position to the pressed position by rotating the cover by a predetermined angle from the open position to the closed position, as shown in Figure 8. [Figure 10] This is a perspective view showing the top of the coating apparatus, illustrating the state in Figure 9, with the clamping vise closed using a tool. [Figure 11] This is a vertical cross-sectional view of the top of the coating apparatus, showing the state after the varnish sheet has been wrapped around the varnish cylinder and the cover has been closed. [Modes for carrying out the invention]

[0023] The coating apparatus of the present invention will be described below with reference to the drawings.

[0024] Figure 1 shows an example of a printing press incorporating a coating device 1 for surface treatment, which involves coating (applying) a varnish (also called resin varnish) to the printed surface of printed paper (material to be coated) to give it a glossy finish.

[0025] This printing press comprises a paper stacking table 2, a paper feeding unit 4 for feeding sheet-fed printing paper P one sheet at a time from the paper stacking table 2 by a feeder device 3, a printing unit 5 for printing on the printing paper P fed from the paper feeding unit 4, a coating device 1 for coating the printing paper printed by the printing unit 5 with varnish (ultraviolet-curing resin varnish), a paper discharge unit 6 for transporting and discharging the varnished printing paper from the coating device 1, and an ultraviolet drying device 7 located within the paper discharge unit 6 for curing the varnish on the printing paper transported by the paper discharge unit 6. Infrared drying devices 8A and 8B are provided at the front and rear of the ultraviolet drying device 7 in the direction of paper transport, and these infrared drying devices 8A and 8B are used to dry the water-based varnish coated on the printing paper. In Figure 1, the paper stacking table 2 side is considered the front, the paper discharge unit 6 side is considered the rear, and the direction penetrating the paper surface is considered the left-right direction (or width direction), and the following explanation will be provided.

[0026] The printing unit 5 is equipped with a plurality (5 colors) of printing units 5A to 5E. These printing units 5A to 5E are equipped with printing impression cylinders 5a to 5e, and each of these printing impression cylinders 5a to 5e is equipped with transfer cylinders 9a to 9e on the upstream side in the transport direction for transferring printing paper P to each printing impression cylinder 5a to 5e. The smaller diameter transfer cylinder 9a located at the starting end (front side) in the transport direction of the transfer cylinders 9a to 9e is also called the paper feed cylinder, and the paper feed unit 4 is composed of this transfer cylinder 9a and the feeder device 3. Although not shown in the figures, each of the cylinders 5a to 5e and the transfer cylinders 9a to 9e is equipped with grippers at multiple locations (or one location) in the circumferential direction for gripping the fed printing paper P with a claw base and claws. The smaller diameter transfer cylinder 9a is also equipped with a gripper at one location in the circumferential direction for gripping the printing paper with a claw base and claws, although not shown in the figures.

[0027] The coating apparatus 1 comprises a varnish cylinder 1A on which a varnish plate 11 (Figures 2 and 3 show the varnish plate 11 before it is wrapped around the varnish cylinder 1A) is attached, a varnish supply roller 10 for supplying varnish to the varnish plate 11 of the varnish cylinder 1A, and a varnish impression cylinder 1B positioned opposite to the varnish cylinder 1A, for transporting printed paper and transferring the varnish from the varnish plate 11 to the transported printed paper.

[0028] Furthermore, the coating apparatus 1 is equipped with a moving means (not shown) that can switch the varnish cylinder 1A between a close position, where it is brought close to the varnish impression cylinder 1B and the varnish supply roller 10 to transfer the varnish, and a separated position, where it is separated from the varnish impression cylinder 1B and the varnish supply roller 10. At the separated position, the varnish plate 11, which will be described later, is attached, and maintenance of the equipment is performed. On the upstream side (front side) of the varnish impression cylinder 1B in the transport direction, there is a transfer cylinder 1G (see Figure 1) for transferring the printing paper to the varnish impression cylinder 1B. This transfer cylinder 1G is equipped with grippers at multiple locations (or one location) in the circumferential direction for gripping the fed-out printing paper with a claw base and claws. The varnish plate 11 is made of a flexible synthetic resin and is more flexible than the printing plate attached to the plate cylinder. Therefore, wrinkles are likely to occur in the varnish plate 11 when it is attached to the varnish cylinder 1A.

[0029] Furthermore, as shown in Figures 2 and 3, the coating apparatus 1 includes a protective cover 18 having a front portion 18A extending upward on the upper side of the varnish cylinder 1A and a top portion 18B extending rearward from the upper end of the front portion 18A, and an openable and closable metal cover 12 that covers the varnish cylinder 1A from above. The cover 12 is configured to be openable and closable by rotating it around a left-right axis X1 at its rear end. The cover 12 also has a number of long rectangular holes 12K formed in the left-right direction and an inclined plate portion 12A that slopes downward toward the front end, a vertical plate portion 12B that is bent downward from the front end of the inclined plate portion 12A, and a bent portion 12C that is bent rearward from the lower end of the vertical plate portion 12B and then bent upward. When the cover 12 is closed, the rear end of the bent portion 12C abuts against a rubber 31 (see Figure 3) provided on the coating apparatus body side, thereby restricting the closing state of the cover 12. Furthermore, protruding portions 13, 13 (only one (right side) is shown in Figure 2) are formed at both the left and right ends of the inclined plate portion 12A, extending in the front-rear direction and bending outwards. The rear ends of arm portions 14, 14 (only one (right side) is shown in Figure 2) extending in the front-rear direction are fixed to the inner surfaces of these protruding portions 13, 13 and pivotally supported on the body side of the coating device 1. This pivot allows the cover 12 to rotate around the left-right axis X1, enabling it to be rotated around the axis X1 to lift it upwards into an open state (see Figures 4-6), which covers the varnish cylinder 1A (see Figures 2 and 3), and an intermediate state (see Figure 9) rotated by a predetermined angle from the open state to the closed state, which is useful when attaching the varnish plate 11 as well as during maintenance.

[0030] In the open state of cover 12, cover 12 approaches the front portion 18A of the protective cover 18 located behind cover 12, and the cover 12 is attracted to the first magnets M1, M1 (only one (right side) is shown in Figure 2) installed on the front portion 18A, thereby maintaining the open state of cover 12. In the intermediate state of cover 12, as shown in Figure 10, the intermediate state of cover 12 is maintained by the engagement and disengagement of a push bolt 24 attached to the left end (one end) of the front-to-rear side of the inner surface of cover 12 with a hole 23A formed in the left side wall portion 23 of the left and right side wall portions 23, 23. Furthermore, by keeping the push bolt 24 engaged with the hole 23B formed in the left side wall portion 23 even in the open state of cover 12, it is possible to prevent cover 12 from detaching from the first magnets M1, M1 and moving to the closed side. Note that the push bolt 24 may be provided on both the left and right sides of cover 12.

[0031] To elaborate on the varnish cylinder 1A, as shown in Figure 3, the varnish cylinder 1A includes a recess 1K within which a clamping vise 15 is inserted and clamped to hold the clamping end of the varnish sheet 11 in order to wrap the varnish sheet 11 around its circumference, and a tail vise 16 is inserted and clamped to hold the tail end of the wrapped varnish sheet 11.

[0032] The clamping vise 15 comprises a vise base 15A fixed to the upstream side of the varnish cylinder 1A in the rotational direction (see Figure 1) within the recess 1K, and a clamping plate 15B positioned opposite the vise base 15A and capable of changing between a closed position where the clamping end of the varnish sheet 11 is clamped by the vise base 15A and an open position where the clamping end of the varnish sheet 11 can be inserted. By rotating the varnish cylinder 1A by a predetermined angle while the clamping end of the varnish sheet 11 is clamped by this clamping vise 15, the varnish sheet 11 is wrapped around the varnish cylinder 1A. Note that two vise bases 15A and two clamping plates 15B (only the clamping plates 15B are visible in Figures 5 and 6) are arranged on the left and right sides.

[0033] On the inner surface of the cover 12, a plate guide 17 is installed that can press the surface of the varnish plate 11, whose clamping end is inserted into the clamping vise 15 in the open position, backward at a position spaced upward from the varnish cylinder 1A. Furthermore, as shown in Figure 3, the plate guide 17 can be positioned along the inner surface of the cover 12. This suppresses the amount of protrusion of the plate guide 17 from the cover 12 toward the varnish cylinder 1A side (downward). Consequently, the space required for the plate guide 17 in the thickness direction of the cover 12 can be reduced, thereby suppressing the increase in size of the coating apparatus 1. As shown in Figure 5, the plate guide 17 includes a rotatable roller 19 that extends in the left-right direction, has approximately the same diameter, and is longer than the width dimension of the varnish plate 11; a pair of left and right brackets 20, 20 that extend in the front-rear direction (up-down direction in Figure 5), with one longitudinal end (tip) rotatably supporting the left and right ends of the roller 19, and the other longitudinal end (base) being configured to rotate around a pivot point X2 in the left-right direction; and guide pins 21, 21 that protrude outward in the left-right direction from the brackets 20, 20 at the left and right end positions of the roller 19. Therefore, with the cover 12 open, the plate guide 17 can be rotated around the pivot point X2 to change the position of the roller 19 between a retracted position away from the varnish cylinder 1A (see Figures 4 and 7) and an operating position closer to the varnish cylinder 1A (see Figure 8). Furthermore, in the retracted position, the roller 19 is further away from the varnish cylinder 1A than the axis X1, which is the pivot point of the cover 12, and in the operating position, it is closer to the varnish cylinder 1A than the axis X1. The roller 19 constitutes a pressing member that presses against the varnish plate 11 inserted into the clamping vise 15.

[0034] The plate guide 17 is designed to be held in place on the cover 12 in both the retracted and operating positions. Specifically, as shown in Figures 5 and 7, a metal plate 22, which is roughly Z-shaped in side view, is attached between the brackets 20, 20 of the plate guide 17. In the retracted position of the plate guide 17, a pair of left and right second magnets M2, M2 (only one shown in Figure 7) are provided on both the left and right ends of the inner surface of the cover 12 on the side opposite the axis X1 for magnetic attraction and holding to the first portion 22A of the plate 22 on the roller 19 side. In the operating position of the plate guide 17, a pair of left and right third magnets M3, M3 (only one shown in Figure 7) are provided on both the left and right ends of the inner surface of the cover 12 on the side opposite the axis X1 for magnetic attraction and holding to the second portion 22B of the plate 22 that is separated from the roller 19. The pivot point X2 on the cover 12 is set to be closer to the rear end than the center in the front-rear direction on the inner surface of the cover 12. By providing the plate guide 17 on the inner surface of the cover 12, a special component for providing the plate guide 17 becomes unnecessary, thereby reducing the number of parts.

[0035] Furthermore, as shown in Figure 9, three guide members 25 are provided on the outer surface of the cover 12 to guide the varnish sheet 11 when wrapping it around the varnish cylinder 1A. The guide members 25 are composed of rotatable guide rollers. As shown in Figure 2, the guide rollers 25 (guide members 25) are long in the left-right direction and are provided at intervals in the front-rear direction between the protrusions 13, 13 formed at both the left and right ends of the cover 12. Note that the number of guide rollers 25 may be other than three.

[0036] The guide pins 21, 21 provided on the plate guide 17, when the cover 12 is closed, cooperate with the engaged member 27 (described later) to constitute a restricting member (first restricting member) for restricting the movement of the plate guide 17 toward the varnish cylinder 1A.

[0037] As shown in Figure 11, the guide pins 21, 21 engage with the engaging members 27, 27 attached to the left and right side walls 23, 23 (see Figure 5) of the coating apparatus body when the cover 12 is closed, thereby restricting the movement of the plate guide 17 toward the varnish cylinder 1A.

[0038] Each engaged member 27, as shown in Figure 3, comprises a plate-shaped body 27A positioned above the varnish cylinder 1A, and a straight groove 27M formed on the inside of the body 27A in the left-right direction, extending in the front-rear direction and having approximately the same width. The front end of the groove 27M is provided with a guide surface 27S for guiding the guide pin 21 to reliably engage with the groove 27M. This guide surface 27S is configured as an inclined surface that is positioned lower towards the engagement start end (front side). A pair of left and right guide covers 28, 28 extending forward are attached to the lower surface of each engaged member 27. These guide covers 28, 28 function as second restricting members to prevent the plate guide 17 from moving toward the varnish cylinder 1A and interfering when the plate guide 17, which is held in a retracted position by the magnetic force of the second magnets M2, M2 in the closed state of the cover 12 shown in Figure 3, becomes detached from the second magnets M2, M2 for any reason, by contacting the guide pins 21, 21. The guide covers 28, 28 are configured in a substantially inverted L-shape when viewed in the front-rear direction and are equipped with contact portions 28A, 28A that are formed to be located above the varnish cylinder 1A when viewed in the side direction.

[0039] The varnish plate 11 can be of several different thicknesses, and when attaching the varnish plate 11 to the varnish cylinder 1A, a sheet member (not shown) for thickness adjustment may be interposed between the varnish plate 11 and the varnish cylinder 1A.

[0040] The rear vise 16 comprises a vise base 16A fixed to the downstream side of the varnish cylinder 1A in the rotational direction (see Figure 1) within the recess 1K, and a rear clamping plate 16B positioned opposite the vise base 16A and capable of changing between a closed position where the rear end of the varnish sheet 11 is clamped by the vise base 16A and an open position where the rear end of the varnish sheet 11 can be inserted. Furthermore, the clamping rear vise 16 is configured to rotate around its left-right axis by a rotation mechanism (not shown). This rotation allows the clamping end to be clamped by the clamping vise 15 and the rear end to be clamped by the rear vise 16, thereby applying tension to the varnish sheet 11 wrapped around the varnish cylinder 1A. Furthermore, the vise base 16A and the clamping plates 16B (only the clamping plates 16B are visible in Figures 5 and 6) are arranged in pairs on the left and right sides, and the clamping plates 16B can be opened and closed independently on the left and right sides.

[0041] As shown in Figures 2 and 3, the upper end of the front section 18A is provided with a pair of left and right guide rollers 29, 29 (only the right side is visible in Figure 2) that can rotate around the left and right axes, and a rotatable clamping roller 30 that is configured to swing around the left and right axis to a clamping position (see Figure 7) in which the varnish plate 11 is clamped between the guide rollers 29, 29 and a release position (see Figure 3) in which the clamping is released by moving away from the guide rollers 29, 29. The clamping roller 30 has dimensions longer than the overall width of the varnish plate 11. Multiple strip-shaped sheets 18K (see Figure 10) made of a material with low contact resistance with the varnish plate 11 are attached to the front surface of the front section 18A at predetermined intervals in the left and right direction. Furthermore, as shown in Figure 3, the lower part of the front portion 18A includes an inclined portion 18a that is bent diagonally backward so that it is located further back towards the bottom, a vertical portion 18b that extends downward from the lower end of the inclined portion 18a, a bottom portion 18c that is bent forward from the lower end of the vertical portion 18b, and a raised portion 18d that is bent upward from the front end of the bottom portion 18c. The vertical portion 18b, the bottom portion 18c, and the raised portion 18d constitute a receiving portion that receives the lower end of the varnish plate 11.

[0042] The procedure for attaching the varnish plate 11 to the varnish body 1A using the above configuration will be explained below.

[0043] First, the varnish sheet 11 to be installed is temporarily placed along the front part 18A of the protective cover 18, starting from the top part 18B (see Figures 2 and 3). At this time, the lower end (clamping end) of the varnish sheet 11 is received by the receiving part at the lower end of the front part 18A. Next, the cover 12 is rotated to the open position and held in place by the first magnets M1, M1 (see Figure 2) (see Figures 4 to 6). Then, the clamping roller 30 is swung to the clamping position (see Figure 7) and the varnish sheet 11 is clamped between the guide roller 29 and the clamping roller 30. After that, the clamping end of the varnish sheet 11 is taken and inserted between the vise base 15A and the clamping plate 15B of the clamping vise 15 (see Figure 7). Next, the plate guide 17 in the retracted position is rotated approximately 180 degrees around the pivot point X2 to position it in an operating position that protrudes downward from the cover 12 (see Figure 8). After this, the cover 12 is rotated from the open state to an intermediate state, and then the push bolt 24 is engaged with the hole 23A to hold the cover 12 in that intermediate state (see Figure 9). At this time, the plate guide 17 in the non-pressing position is switched to a pressing position that presses the varnish plate 11, and the varnish plate 11, whose tail end has come off the clamping roller 30, falls toward the cover 12 and is supported by the guide rollers 25, 25, 25 provided on the cover 12. In this pressing position, the roller 19 of the plate guide 17 presses the surface of the varnish plate 11, whose clamping end is inserted into the clamping vise 15, approximately backward at a position above the varnish cylinder 1A, thereby allowing the varnish plate 11 to be held in the clamping vise 15 in a taut state. Furthermore, the varnish plate 11 can be pressed against the outer surface of the varnish cylinder 1A near the clamping vise 15. This prevents the varnish plate 11 from changing position while inserted into the clamping vise 15 before closing, thus preventing it from floating or shifting. Therefore, it prevents the varnish plate 11 from being mounted on the varnish cylinder 1A with wrinkles. In the intermediate state of the cover 12, the plate guide 17 is in an inclined position, with the tip roller 19 side positioned lower, as shown in Figure 9, but it may also be configured to be in a horizontal position.

[0044] Next, using the tool 32 shown in Figures 9 and 10, the cam 33 on one side in the left-right direction is manually rotated clockwise to close the clamping plate 16B on that side in the left-right direction, gripping (clamping) one side of the clamping end of the varnish plate 11. Subsequently, the cam 33 on the other side in the left-right direction is similarly rotated clockwise manually to close the clamping plate 16B on the other side in the left-right direction, gripping (clamping) the other side of the clamping end of the varnish plate 11. After the clamping ends of the varnish plate 11 are gripped, the varnish plate 11 is wrapped around the varnish cylinder 1A by rotating the varnish cylinder 1A by a predetermined angle clockwise. During this wrapping, the guide rollers 25, 25, 25 and the roller 19 rotate to guide the varnish plate 11, thereby suppressing the occurrence of scratches on the varnish plate 11. After wrapping, the rear end of the varnish plate 11 is held and inserted between the vise base 16A and the clamping plate 16B of the rear vise 16. The left and right rear vises 16, 16 are closed using the tool 32 in the same way as the clamping vises 15, 15, and then tension is applied to the varnish plate 11 as described above to complete the installation of the varnish plate 11. After completion, the push bolt 24 is released and the cover 12 in the intermediate state is rotated downward to close it (see Figure 11). At this time, as the cover 12 rotates downward, the guide pins 21, 21 move further to the back (rear) side of the grooves 27M, 27M of the engaged members 27, 27, and the engagement is continued. As a result, the cover 12 is closed with the movement of the plate guide 17 toward the varnish cylinder 1A side restricted.

[0045] In this embodiment, the cover 12 is closed while the plate guide 17 is in the operating position. However, the cover 12 may be rotated from the intermediate position to the upper open position to change the position of the plate guide 17 from the operating position to the retracted position before the cover 12 is rotated to the closed position (as shown in Figure 3). In this closed position of the cover 12, the plate guide 17 is held in place by the second magnets M2, M2. If the plate guide 17 detaches from the second magnets M2, M2 for any reason, the guide pins 21, 21 will contact the contact portions 28A, 28A of the guide covers 28, 28, preventing the plate guide 17 from moving (falling) and interfering with the varnish cylinder 1A.

[0046] Furthermore, the present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention.

[0047] In the above embodiment, a printing unit 5 equipped with five printing units 5A to 5E is shown, but the number of printing units is not limited to five. Furthermore, there may be no printing units at all. Also, although the paper discharge unit 6 is configured as a chain conveying device equipped with a gripper, a printing press without this paper discharge unit 6 is also possible, and the specific configuration of each part constituting the printing press is not limited to what is shown in the figure. Furthermore, while sheet paper is used as the printing paper, film or continuous long sheets of paper may also be used. Also, the material to be coated may be unprinted paper or film.

[0048] Furthermore, in the above embodiment, the plate guide 17 was rotated relative to the cover 12 to change its position between the retracted position and the operating position, but the plate guide 17 may also be slid relative to the cover 12 to change its position between the retracted position and the operating position.

[0049] Furthermore, in the above embodiment, the plate guide 17 is provided on the cover 12, and the plate guide 17 is positioned in the operating position while the cover 12 is in an intermediate state, thereby switching the plate guide 17 from a non-pressing position where the varnish plate 11 is not pressed to a pressing position where the varnish plate 11 is pressed. However, the plate guide may be provided on a fixing member other than the cover, and the switch from a non-pressing position where the varnish plate 11 is not pressed to a pressing position where the varnish plate 11 is pressed may be made simply by positioning the plate guide from a retracted position to an operating position.

[0050] Furthermore, in the above embodiment, the roller 19 and the guide roller 25 are composed of a single rotating body extending with the same diameter in the left-right direction, but it may also be a single rotating body having multiple large-diameter sections, or a configuration in which multiple independent rotating bodies (rollers or spheres) are spaced apart in the left-right direction.

[0051] Furthermore, in the above embodiment, the pressing member is composed of a rotatable roller 19 and the guide member is composed of a rotatable guide roller 25, but the pressing member and the guide member may also be composed of non-rotating members. In this case, for example, it is preferable to make the member that contacts the varnish plate 11 out of a soft material (e.g., rubber, synthetic resin, nonwoven fabric, etc.) or a brush.

[0052] Furthermore, in the above embodiment, two vise bases 15A, 16A and two gripping plates 15B, 16B were provided on the left and right sides respectively, but any number of three or more may be provided, or only one may be provided. [Explanation of Symbols]

[0053] 1...Coating device, 1A...Varnish cylinder, 1B...Varnish impression cylinder, 1G...Transfer cylinder, 1K...Recess, 2...Paper stacking table, 3...Feeder device, 4...Paper feeding section, 5...Printing section, 5A~5E...Printing unit, 5a~5e...Printing impression cylinder, 6...Paper discharge section, 7...UV drying device, 8A,8B...Infrared drying device, 9a~9e...Transfer cylinder, 10...Varnish supply roller, 11...Varnish plate, 12...Cover, 12A...Inclined plate section, 12B...Vertical plate section, 12C...Bending section, 12K...Hole, 13...Protruding part, 14...Arm section, 15...Clamping side vise, 15A...Vise base, 15B...Clamping plate, 16...Rear side vise, 16A...Vise base, 16B...Clamping plate, 17 ...plate guide, 18...protective cover, 18A...front side, 18B...top side, 18K...strip-shaped sheet, 18a...inclined part, 18b...vertical part, 18c...bottom part, 18d...rising part, 19...roller (pressing member), 20...bracket, 21...guide pin, 22...plate material, 23...side wall part, 23A,23B...hole, 24...push bolt, 25...guide roller (guide member), 27...engaged member, 27A...body, 27M...groove, 27S...guide surface, 28...guide cover, 28A...contact part, 29...guide roller, 30...clamping roller, 31...rubber, 32...tool, 33...cam, P...printing paper, X1...axis center, X2...pivot point

Claims

1. The apparatus comprises a varnish cylinder around which a varnish plate is wound to supply varnish to be applied to a material to be coated, and a varnish impression cylinder positioned opposite the varnish cylinder to transfer the varnish from the varnish plate to the material to be coated, The varnish cylinder comprises a clamping vise for inserting and clamping the clamping end of the varnish sheet in order to wrap the varnish sheet around its circumference, and a rear vise for inserting and clamping the rear end of the wrapped varnish sheet. The varnish plate is equipped with a plate guide that can switch between a pressing position and a non-pressing position, where the surface of the varnish plate can be pressed at a position located above the upper end of the varnish cylinder, when the lower end of the clamping side is inserted into the clamping side vise from above and the clamping side vise is not gripping the clamping side. The plate guide is equipped with a pressing member for pressing the surface of the varnish plate, The pressing member is a rotatable roller that extends in the left-right direction, has substantially the same diameter, and has dimensions longer than the width dimension of the varnish plate. The coating apparatus is characterized in that the plate guide curves the varnish plate so as to press the back surface of the varnish plate against the outer surface of the varnish cylinder near the clamping vise by switching from the non-pressing position to the pressing position.

2. The coating apparatus according to claim 1, characterized in that the plate guide is installed in a position that can be changed relative to an openable and closable cover that covers the varnish barrel.

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