JP2019198963A - Gravure printing machine - Google Patents

Abstract

To provide a gravure printing machine which can achieve improvements in exhaust performance and printing quality.SOLUTION: A tip of a doctor blade comes into contact with an outer peripheral surface of a plate cylinder 40 which is oriented toward a pressure contact part with an impression cylinder from a pressure contact part with a furnisher roll 50 which is rotated in a state that a lower part thereof is immersed in an ink accumulated in an ink pan 4. A local air exhaust structure which discharges air around the plate cylinder 40, comprises: a partition plate 70 which is so located as to partition between the furnisher roll 50 and a web; a pan cover 100 which is so configured as to partition a local space LS which extends below the partition plate; and an air discharge device which is connected to the local space LS.SELECTED DRAWING: Figure 8

Description

  The disclosed technology relates to a gravure printing machine, and in particular, relates to a technology that realizes improvement of a working environment for organic solvents, improvement of printing quality, and the like.

  FIG. 1 shows a basic structure of a general gravure printing machine in which ink collected in an ink pan is attached to a plate cylinder via a finisher roll.

  In the case of this type of gravure printing machine, at the time of printing, a finisher roll 201 that is rotatably supported is placed inside an ink pan 200 in which ink is accumulated so that the lower part thereof is immersed in the ink. The upper outer peripheral surface of the finisher roll 201 is pressed against the lower outer peripheral surface of the plate cylinder 202. An intaglio 202 a is formed on the outer peripheral surface of the plate cylinder 202.

  An impression cylinder 203 that is rotatably supported is arranged on the upper part of the plate cylinder 202, and a web W for printing is sandwiched between the outer peripheral surface of the impression cylinder 203 and the outer peripheral surface of the plate cylinder 202. The The doctor blade 204 is arranged so that the tip is in pressure contact with the outer peripheral surface of the plate cylinder 202 that faces the clamping portion of the web W.

  At the time of printing, the plate cylinder 202 is rotationally driven in a predetermined direction (clockwise in the illustrated example), and the web W is also conveyed in conjunction therewith. By doing so, the finisher roll 201 rotates at a predetermined speed corresponding to the rotation speed of the plate cylinder 202 in conjunction with the rotation of the plate cylinder 202, and the ink adhered to the outer peripheral surface of the plate cylinder 202 is rotated. Transfer to the outer surface. Of the ink transferred to the outer peripheral surface of the plate cylinder 202, excess ink protruding from the intaglio plate 202a is scraped off by the doctor blade 204, and the ink remaining on the intaglio plate 202a is continuously transferred to the web W being conveyed.

  Usually, the ink contains an organic solvent such as toluene. Therefore, it is necessary to suppress the diffusion of the organic solvent during printing so as not to adversely affect the health of the operator.

  In this type of gravure printing machine, the side where the finisher roll 201 is located is generally a space where an operator performs operations such as switching. For this reason, the side where the doctor blade 204 is located does not interfere with the work, and therefore it is possible to cope with the diffusion of the organic solvent relatively easily by installing a plate or the like. On the other hand, the side on which the finisher roll 201 is located is difficult to cope with because it tends to interfere with work.

  Further, in this type of gravure printing machine, the printed web W is positioned above the finisher roll 201. Therefore, the solvent vapor generated from the ink during printing diffuses into the space obliquely above the finisher roll 201 as the printed web W moves.

  On the other hand, in Patent Document 1, in the conventional method of exhausting with the local exhaust device installed below the ink pan, the odor of the organic solvent may leak into the work space, so the dryer disposed above the ink pan. It is disclosed that a film-like curtain is suspended. Thereby, the curtain and the work space are blocked, and the odor of the organic solvent is prevented from leaking into the work space.

  Further, in this type of gravure printing machine, ink dripped from the finisher roll 201 engulfes air and scatters. For this reason, the scattered ink may adhere to the printed web W and the printing may be soiled.

  On the other hand, Patent Document 2 discloses a doctor lower cover that prevents ink scraped off by a doctor from splashing around the doctor's lower part and soiling the periphery thereof. Specifically, a film-like doctor lower cover is provided between the doctor mounting base and the ink pan located below the doctor mounting base so as to cover the gap.

JP-A-6-316059 Japanese Patent Laid-Open No. 9-141832

  In the method of hanging the curtain as in Patent Document 1, the vapor of the solvent diffuses throughout the large space from the finisher roll to the dryer. Operators are adversely affected by the solvent because the curtain must be removed or placed inside during maintenance or switching. Moreover, since the side of the curtain is largely open, there is a possibility that solvent vapor may diffuse into the work space. Since it is difficult to visually recognize the printed part located in the back from the outside of the curtain, there is a possibility that the check operation of the printing state may be hindered.

  The doctor lower cover of Patent Document 2 cannot prevent the printed web W from being stained.

  Accordingly, the disclosed gravure printing machine is to provide a gravure printing machine capable of improving exhaust performance and printing quality.

  The disclosed technology relates to a gravure printing press.

  The gravure printing machine includes an ink pan that stores ink, a finisher roll that rotates in a state in which a lower portion is immersed in the ink stored in the ink pan, and a portion other than the lower portion of the finisher roll. A plate cylinder that rotates in a state in which the outer peripheral surfaces thereof are pressed against each other, a pressure drum that rotates in a state where the plate cylinder and the outer peripheral surfaces of each plate are in pressure contact with each other and a web to be printed is sandwiched therebetween, and the fan A doctor blade whose tip is in contact with an outer peripheral surface of the plate cylinder heading from a pressure contact portion with the shear roll to a pressure contact portion with the pressure drum; and a local exhaust structure for exhausting air around the plate cylinder.

  The local exhaust structure has a tip close to the outer peripheral surface of the plate cylinder from the pressure contact portion with the pressure drum toward the pressure contact portion with the finisher roll, and between the finisher roll and the web. An upper cover arranged to partition the lower cover, a lower cover installed under the ink pan and configured to partition a local space extending below the upper cover, and connected to the local space via an exhaust passage An exhaust device.

  That is, in this gravure printing machine, during printing, the finisher roll rotates with the lower part immersed in the ink accumulated in the ink pan, and the part other than the lower part of the finisher roll above the ink level. Thus, the plate cylinder rotates in a state where the finisher roll and the outer peripheral surface of each other are in pressure contact with each other. The plate cylinder also rotates in a state where the impression cylinder and the outer peripheral surfaces of the plate cylinder are pressed against each other and the web to be printed is sandwiched. The tip of the doctor blade is in contact with the outer peripheral surface of the plate cylinder from the pressure contact portion with the finisher roll toward the pressure contact portion with the pressure drum in order to remove excess ink.

  The gravure printing machine is further provided with a local exhaust structure for exhausting air around the plate cylinder. The local exhaust structure is configured to partition an upper cover arranged to partition the finisher roll and the web, and a local space that is installed below the ink pan and spreads below the upper cover. And an exhaust device connected to the local space via an exhaust passage.

  According to this gravure printing machine, even if the printed web is located immediately above the finisher roll, the upper cover is arranged so as to partition the web from the finisher roll. Therefore, even if the ink dripped from the finisher roll entrains and scatters, the web can be prevented from being soiled by the ink.

  And the local space that spreads below the upper cover, that is, the place where the solvent evaporates from the ink during printing is easily divided by the upper cover and the lower cover, and is connected to the exhaust device via the exhaust passage. It is connected. Therefore, the space in which the solvent evaporated from the ink diffuses during printing can be minimized, and the solvent vapor can be efficiently exhausted. Furthermore, since the space above the upper cover is open to the work space, the print site can be easily seen and the print status can be confirmed without any trouble.

  The gravure printing machine is further provided with a lower plate installed below the ink pan and on a lower side of the lower plate so as to extend along the local space, and the exhaust passage is connected thereto. A buffer duct, and an air inlet that communicates the local space and the buffer duct, and the air inlet is elongated in the lower plate so as to extend along the local space. Good.

  Since the local space is elongated in the width direction of the web, the exhaust tends to be uneven due to the connection position of the exhaust passage to the buffer duct. On the other hand, in this gravure printing machine, a buffer duct to which an exhaust passage is connected is provided so as to extend along the local space, and an intake port that communicates the local space with the buffer duct is provided along the local space. It is formed so as to be elongated.

  Therefore, the variation in the suction pressure in the length direction can be reduced between the buffer duct and the intake port, so that the non-uniformity of the exhaust can be reduced.

  In the gravure printing machine, the upper cover may be removably attached to an attachment member provided in the vicinity of the plate cylinder.

  In this case, the upper cover can be removed as necessary, so that the plate cylinder and ink can be easily replaced, and the printing switching time can be shortened.

  In the gravure printing machine, the local exhaust structure further includes a support device that supports the upper cover, the support device having a predetermined length, and a linear member connected to the upper cover; A winder that winds up the linear member and that can be pulled out by manual operation, and winds around the winder when the upper cover is removed from the mounting member. It is good also as being comprised so that it may hang | suspend from the said linear member of the state made, and may be located away above the said plate cylinder.

  Then, at the time of printing, the upper cover can be attached to the attachment member while the upper cover is pulled down and the linear member is pulled out from the winder. When the upper cover is removed from the mounting member, such as when switching printing, the linear member is wound around the winder, and the upper cover is automatically suspended at a predetermined position.

  That is, since it is not necessary to carry the upper cover and the upper cover can be handled with a weak force, the work burden on the operator can be reduced, and the work time can be reduced safely.

  According to the disclosed gravure printing machine, exhaust performance and print quality can be improved.

It is the schematic which shows the basic structure of a common gravure printing machine. It is the schematic (sectional drawing seen from the left side) which shows the structure of the gravure printing machine disclosed by this embodiment. A state where printing is not performed, such as when switching, is shown. It is the schematic (view seen from the front) which shows the structure of the gravure printing machine disclosed by this embodiment. A state where printing is not performed, such as when switching, is shown. It is the schematic (sectional drawing seen from the left side) which shows the structure of the gravure printing machine disclosed by this embodiment. The state at the time of printing is shown. It is the schematic which expands and shows the principal part of FIG. It is the schematic (view seen from the left side) which shows structures, such as a plate support apparatus. It is the schematic (view seen from the front side) which shows structures, such as a plate support apparatus. It is a schematic sectional drawing in the arrow XX line in FIG. 5 which shows the structure of a plate attachment member. It is a schematic perspective view which shows the state of the front of the plate cylinder at the time of printing. It is the schematic which looked at the pan cover from the upper part. It is a schematic sectional drawing in the arrow YY line | wire in FIG. 9A. It is a schematic sectional drawing in the arrow ZZ line in FIG. 9A.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the following description is merely illustrative in nature and does not limit the present invention, its application, or its use.

<Configuration of gravure printing machine>
2 and 3 schematically show the configuration of the gravure printing machine 1 disclosed in the present embodiment. 2 and 3 show a state of the gravure printing machine 1 at the time of switching performed during printing. The state of the gravure printing machine 1 during printing is shown in FIG.

  The gravure printer 1 is a device that continuously prints ink (single color) on a transported web W (print target). A plurality of gravure printing machines 1 are arranged in a line along the conveyance direction of the web W to form a gravure printing system, and each gravure printing machine 1 continuously prints by color on the web W being conveyed. Multicolor printing is also possible. A wide variety of printing can be performed by replacing the ink and the plate cylinder 40 used in the gravure printing machine 1.

  The gravure printing machine 1 is installed on the floor surface F so as to extend in the vertical direction, and has a pair of support frames 2 and 2 that are opposed to each other in the left-right direction at a certain interval, for example, 1 m or more and 2 m or less. Between these support frames 2 and 2, related devices such as an ink pan 4, a dryer 10, guide rolls 20 and 21, an impression cylinder 30, a plate cylinder 40, and a finisher roll 50 constituting the gravure printing machine 1 are arranged in the vertical direction. Are arranged at predetermined positions.

  In the gravure printing machine 1, in order to efficiently exhaust the organic solvent that evaporates from the ink during printing, a space (locally located) around the plate cylinder 40, particularly downstream of the printing portion in the rotation direction of the plate cylinder 40. A local exhaust structure for exhausting the air in the space LS) is provided. The local exhaust structure includes a pan cover 100 (an example of a lower cover), a partition plate 70 (an example of an upper cover), a plate attachment member 80 (an example of an attachment member), a plate support device 90 (an example of a support device), and an exhaust device 110. Etc. Details of these will be described later.

  On the right side of the support frame 2 in FIG. 2, there is a work space S where the operator OP performs work such as replacement and washing of the plate cylinder 40 and ink supply. For convenience, the side where the work space S exists is referred to as “front”. In FIG. 3, the front side of the paper is “front”. The directions such as front, rear, left and right are indicated by arrows in each figure.

  The ink pan 4 is a tray-like container that is long in the left-right direction and has a rectangular bottom when viewed from above. The upper surface of the ink pan 4 is open. During printing, ink is circulated and supplied to the ink pan 4 in a state controlled by an ink circulation device (not shown) so as to maintain a predetermined liquid level. Thereby, ink is stored in the ink pan 4. Below the ink pan 4, a pan cover 100 that surrounds the ink pan 4 with the top of the ink pan 4 opened is installed.

  The ink pan 4 is installed substantially horizontally in a detachable state on the support base 3 installed on the floor surface F between the support frames 2 and 2. The pan cover 100 is also installed on the support base 3. Although details are omitted, the support base 3 is configured to move up and down the ink pan 4 and the pan cover 100. Specifically, as shown in FIG. 2, the ink pan 4 and the pan cover 100 are located at the lower position away from the plate cylinder 40, and the ink pan 4 is close to the lower portion of the plate cylinder 40 as shown in FIG. 4. Then, the pan cover 100 is displaced to the use position located around the plate cylinder 40.

  The ink pan 4 is also installed on the pan cover 100 via a slide device 120 shown in a simplified manner in FIG. 5, and is installed in a state where it can be pulled out forward. By pulling out the ink pan 4 to the work space S by the slide device 120 at the time of switching, the ink pan 4 can be easily replaced. A space for installing a spare ink pan is secured behind the ink pan 4.

  The ink pan 4 is also configured so that the ink pan 4 can be tilted by lifting one end side in the lateral width direction of the ink pan 4 by a tilting device 130 shown in a simplified manner in FIG. At the front corner portion on the other end side in the lateral width direction of the ink pan 4, a tub-like ink bleed port 4 a is provided (see FIG. 8). Therefore, at the time of switching, the ink pan 4 is tilted by the tilting device 130 so that the ink can flow down from the ink outlet 4a. The structure of the ink pan 4 is an example, and can be changed according to the specification.

  The finisher roll 50 is a columnar elongated member. The outer peripheral portion of the finisher roll 50 is made of an elastic material such as rubber. FR support shafts 51 protrude from the centers of both ends of the finisher roll 50. These FR support shafts 51, 51 are supported by a pair of swing arms 52, 52 via a shaft support portion 52a in a detachable state. Thereby, the finisher roll 50 is rotatable about a rotation axis J1 extending horizontally in the left-right direction.

  Although not described in detail, each swing arm 52 is rotatably supported on each of the left and right support frames 2 and 2. As the swing arms 52 and 52 are rotated, the finisher roll 50 is moved away from the plate cylinder 40, as shown in FIG. 2, and in the standby position as shown in FIG. The nischer roll 50 is displaced to the use position where it is pressed against the plate cylinder 40.

  The length of the ink pan 4 in the left-right direction is shorter than the distance between the left and right swing arms 52 and 52, and the ink pan 4 moves up and down between the swing arms 52 and 52. The length of the finisher roll 50 in the left-right direction is shorter than the length of the ink pan 4 in the left-right direction, and the finisher roll 50 can be accommodated in the ink pan 4.

  Accordingly, as shown in FIG. 5, during printing, the finisher roll 50 is accommodated in the ink pan 4, and the lower portion of the finisher roll 50 is immersed in the ink accumulated in the ink pan 4. Has been.

  The plate cylinder 40 is a long columnar member. An intaglio 41 constituting the printing surface is formed on the outer peripheral surface of the plate cylinder 40 except for a part of both ends in the longitudinal direction. The outer diameter of the plate cylinder 40 is, for example, in the range of 120 mm or more and 300 mm or less, and the lateral width of the intaglio 41 is, for example, in the range of 800 mm or more and 1400 mm or less. The outer diameter and the lateral width of the plate cylinder 40 are appropriately selected according to the web W to be printed. As shown in FIG. 3, GR support shafts 42 protrude from the centers of both ends of the plate cylinder 40.

  These GR support shafts 42 and 42 are detachably supported by GR shaft support portions 43 and 44 provided on the left and right support frames 2. Although not described in detail, one GR shaft support portion (drive side GR shaft support portion 43) is connected to a rotation drive portion controlled by a servo motor. The other GR shaft support portion (non-driving side GR shaft support portion 44) is configured to advance and retract toward the drive side GR shaft support portion 43 by an air cylinder.

  As the non-driving side GR shaft support portion 44 advances, the plate cylinder 40 is supported in a state of being rotatable around a rotation shaft J2 extending horizontally in the left-right direction. Then, the plate cylinder 40 is rotationally driven at a predetermined speed in a predetermined direction (clockwise in FIG. 5) by driving and controlling the rotation driving unit.

  The impression cylinder 30 is also a long cylindrical member. Similar to the finisher roll 50, the outer peripheral portion of the impression cylinder 30 is also made of an elastic material such as rubber. Each of the finisher roll 50 and the impression cylinder 30 has a length equal to or longer than the plate cylinder 40. PR support shafts 31 protrude from the centers of both ends of the impression cylinder 30. These PR support shafts 31 are supported by a shaft support portion 32. Thereby, the impression cylinder 30 is rotatable around a rotation axis J3 extending horizontally in the left-right direction.

  Although details are omitted, each shaft support 32 is provided in each of the pair of lifting arms. Each lifting arm is supported by each of the left and right support frames 2 and 2 so as to be slidable in the vertical direction. By sliding these elevating arms, the impression cylinder 30 is moved to the standby position located above the plate cylinder 40 as shown in FIG. 2, and the impression cylinder 30 is moved to the plate cylinder 40 as shown in FIG. It is displaced to the use position where it comes into pressure contact.

  As shown in FIG. 5, at the time of printing, the upper outer peripheral surface of the finisher roll 50 that is not immersed in ink is configured to press against the outer peripheral surface of the plate cylinder 40 on the diagonally lower side of the front side of the plate cylinder 40. (The press-contact portion between the finisher roll 50 and the plate cylinder 40 is also referred to as a first press-contact portion 45). Further, the lower end portion of the impression cylinder 30 around which the web W is wound is pressed against the upper end portion of the plate cylinder 40, and the web W is sandwiched between the outer peripheral surface of the impression cylinder 30 and the outer peripheral surface of the plate cylinder 40. (The pressure contact portion between the pressure cylinder 30 and the plate cylinder 40 is also referred to as a second pressure contact portion 46).

  Accordingly, during printing, the plate cylinder 40 is driven to rotate in conjunction with the conveyance of the web W, whereby the finisher roll 50 and the impression cylinder 30 rotate in conjunction with the rotation.

  A doctor support device 60 is disposed on the rear side of the plate cylinder 40. The doctor support device 60 is supported by the left and right support frames 2 and 2 and is configured so that the doctor blade 61 can be fixed. The doctor blade 61 is a highly rigid strip-shaped member that is longer in the left-right direction than the intaglio 41 of the plate cylinder 40 and is thin. As shown in FIG. 5, the doctor blade 61 attached to the doctor support device 60 has a leading end in the vicinity of the second press contact portion 46 toward the second press contact portion 46 in the vicinity of the second press contact portion 46 at the time of printing. It is positioned so as to be pressed against the outer peripheral surface of the barrel 40.

  At the time of printing, the ink adhered to the finisher roll 50 adheres to the outer peripheral surface (intaglio 41) of the plate cylinder 40 at the first pressure contact portion 45. Excess ink adhering to the plate cylinder 40, specifically, ink protruding from the intaglio 41 is scraped off by the doctor blade 61. Thus, before reaching the second pressure contact portion 46, the ink of the intaglio 41 is adjusted to an appropriate amount, and the ink is transferred to the web W at the second pressure contact portion 46, whereby printing is performed (second pressure contact). The part 46 constitutes a printing part).

  An apron 62 is disposed on the rear side of the plate cylinder 40. The apron 62 is attached to the doctor support device 60 so as to extend along the plate cylinder 40. The apron 62 partitions the doctor support device 60 and the ink pan 4. On the other hand, a plate attachment member 80 that fixes the partition plate 70 is disposed on the front side of the plate cylinder 40.

  Above the impression cylinder 30, a plurality of upstream guide rolls 20 that guides downward toward the impression cylinder 30 while supporting the web W to be printed by the gravure printing machine 1, and printing sent out from the impression cylinder 30 is performed. A plurality of downstream guide rolls 21 that guide upward while supporting the web W are arranged at predetermined positions.

  Each of the upstream guide rolls 20 is disposed at a predetermined position in the vertical direction along the rear side portion of the support frame 2. Each of the upstream guide rolls 20 is supported by the left and right support frames 2 and 2 while being rotatable around a horizontal central axis extending in the left-right direction. By being supported by these upstream guide rolls 20, the web W carried into the upper rear of the gravure printing machine 1 is guided downward along the rear side of the support frame 2, and the printing surface is on the lower side. In the state facing toward the center, the lower part of the impression cylinder 30 is wound in a substantially V shape when viewed from the direction in which the rotation axis J3 extends.

  Each of the downstream guide rolls 21 is disposed at a predetermined position in the vertical direction along the front side portion of the support frame 2. A part of the downstream guide roll 21 is arranged inside the dryer 10 installed in the upper part of the gravure printing machine 1.

  The dryer 10 is a device that dries the ink of the printed web W while conveying the web W, and has a substantially hermetically sealed rectangular box-shaped dryer cover 11. The dryer cover 11 is disposed between the left and right support frames 2, 2 so as to extend along the front side portion of the upper portion of the support frame 2. The front portion of the dryer cover 11 protrudes forward from the support frame 2.

  An elongate inlet 14 for receiving the web W is opened at the lower end of the dryer cover 11, and an elongate outlet 15 for feeding the web W is opened at the upper end of the dryer cover 11. Inside the dryer cover 11, a plurality of downstream guide rolls 21 are arranged in a state where these inlets 14 and outlets 15 are arranged in a line in the vertical direction.

  Each of the downstream guide rolls 21 is supported by the left and right support frames 2, 2 and the left and right side walls of the dryer cover 11 in a state of being rotatable about a horizontal central axis extending in the left-right direction. By being supported by these downstream guide rolls 21, the printed web W passes through the interior of the dryer 10 with its printing surface facing the front side, and upwards along the front side portion of the support frame 2. Guided.

  Although details are omitted, the dryer 10 also has related devices such as a blower and a heat exchanger that circulates dry hot air inside the dryer cover 11, and these related devices are also provided around the dryer cover 11. It is attached.

  The dryer 10 is arranged above these so that the plate cylinder 40 and the finisher roll 50 can be replaced safely and easily. Specifically, the lower end portion 11a of the dryer cover 11 (specifically, the lower end portion 11a on the front side facing the work space S) is 1.7 m to 2.2 m higher than the floor F of the work space S. It is arranged to be located.

  Since the average height of a typical Japanese adult male is about 1.7 m, the operator OP that the dryer 10 operates by setting the height of the lower end portion 11 a of the dryer cover 11 to 1.7 m or more. It is designed so that the operator OP can work safely. On the other hand, if the height of the lower end portion 11a of the dryer cover 11 exceeds 2.2 m, the total height of the gravure printing machine 1 becomes too large, and thus there is a disadvantage that the facility where the gravure printing machine 1 can be installed is limited. is there.

  In order to support and guide the web W coming out of the dryer 10, the plurality of downstream guide rolls 21 arranged on the upper part of the gravure printing machine 1 include cooling rolls 21 a that can be cooled. During printing, the cooling roll 21a is circulated and supplied into the cooling roll 21a from a refrigerant circulation supply device (not shown) so that the cooling roll 21a is cooled. The web W heated by the dryer 10 is cooled by being in contact with the outer peripheral surface of the cooling roll 21a.

  By being supported and guided by these downstream guide rolls 21, the web W printed by the gravure printing machine 1 is dried and cooled by hot air, and then from the upper part of the gravure printing machine 1 to the front thereof. It will be carried out.

(Division plate 70, plate mounting member 80)
As shown in FIGS. 2 and 3, the partition plate 70 of the gravure printing machine 1 is attached to the dryer 10 while being supported by a plate support device 90.

  Specifically, the partition plate 70 is made of a long strip-like member formed by pressing a thin metal plate mainly made of aluminum, such as an aluminum alloy. The length of the long side of the partition plate 70 is formed to be at least larger than the plate cylinder 40. The length of the short side of the partition plate 70 is at least larger than the diameter of the finisher roll 50. The thickness of the partition plate 70 is about several mm such as 3 mm.

  On one long side of the partition plate 70, a support side edge 71 having a substantially L-shaped cross section is provided along the long side (see FIG. 5). On the other long side of the partition plate 70, a gently bent insertion side edge 72 is provided elongated along the long side. Each of the support side edge 71 and the insertion side edge 72 is formed by bending the edge of the long side of the partition plate 70.

  The plate support device 90 includes a pair of winders 91 and 91 attached to the left and right side surfaces of the dryer cover 11. The partition plate 70 is connected to the protruding end of the relay wire 92 connected to the winding wire 91a mounted on the winding tools 91, 91 (see FIG. 6A). Specifically, through holes are formed in each end of the support side edge 71, and the end of the relay wire 92 is connected to a ring 93 attached to these through holes (see FIG. 5). ).

  And the base end part of the relay wire 92 is attached to the hook metal fitting 94 provided in the front-end | tip of the winding wire 91a. The winding wire 91 a has a predetermined length and is configured such that the entire length thereof is automatically wound inside the winding tool 91. Although details are omitted, a winding shaft that is urged to rotate in a predetermined direction by an elastic member such as a coil spring is built in the winding tool 91. The winding wire 91 a is wound around the winding shaft by the elastic force of the elastic member, whereby the entire winding wire 91 a is accommodated in the winding tool 91.

  In the gravure printing machine 1, the winding wire 91a and the relay wire 92 constitute a linear member, but the present invention is not limited to this. For example, when the winding wire 91a is lengthened so that when the winding wire 91a is wound around the winding tool 91, a part of the leading end side remains outside the winding tool 91, so that the relay wire 92 may be omitted.

  By pulling out the winding wire 91 a against the winding force of the elastic member, most of the winding wire 91 a can be pulled out from the winding tool 91. The winding force of the elastic member is set so that the winding wire 91a can be easily pulled out by manual operation. In the case of the winder 91, the winding force of the pair of winders 91, 91 is greater than the weight of the partition plate 70, and when the partition plate 70 is suspended, the winding wire 91 a of each winder 91. The full length is to be wound up.

  The length of the relay wire 92 is adjusted so that the partition plate 70 is positioned in the vicinity of the lower end portion 11 a of the dryer cover 11. Specifically, a part of the upper side of the partition plate 70 is located above the lower end part 11 a of the dryer cover 11, and a part of the lower side of the partition plate 70 is located below the lower end part 11 a of the dryer cover 11. Thus, the length of the relay wire 92 is adjusted.

  As a result, the partition plate 70 is separated from the plate cylinder 40 in a state of extending in a substantially horizontal direction by being suspended from the relay wires 92 and 92 as shown in the solid line of FIG. 2 and FIG. The dryer cover 11 is configured to be positioned in the vicinity of the lower end portion 11a.

  The winder 91 is attached to the slide support 12 of the dryer cover 11.

  As shown in FIGS. 6A and 6B, the dryer cover 11 includes a rear cover 11R that constitutes a rear half part thereof and a front half part thereof for facilitating operations such as cleaning and maintenance inside thereof. And a front cover 11F. The rear cover 11R is fixed to the left and right support frames 2 and 2, and the front cover 11F is supported by the left and right support frames 2 and 2 through the slide support portion 12 so as to be able to advance forward. .

  The left and right support frames 2, 2 are provided with cross beam members 2 a extending substantially horizontally from the front edges toward the front. Guide members 12a constituting the slide support portion 12 are provided on the upper portions of the cross beam members 2a and 2a, and the side surfaces of the front cover 11F facing the cross beam members 2a and 2a are arranged in the front-rear direction by the guide members 12a. A reinforcing plate 12b (which constitutes the slide support portion 12) that is slidably supported is attached.

  Each reinforcing plate 12b is attached with a tip portion of a rod of a cylinder 12c (which constitutes the slide support portion 12) attached to each support frame 2, and a solid line and an imaginary line in FIG. As indicated by the line, the front cover 11F slides back and forth. The winder 91 is detachably attached to the latch portion 13 provided on the reinforcing plate 12b.

  As shown in FIG. 3, two plate attachment members 80 are arranged symmetrically in the vicinity of the left and right ends of the plate cylinder 40. As shown in FIG. 5, each plate attachment member 80 is disposed substantially horizontally on the front side of the plate cylinder 40.

  Each plate attachment member 80 is configured to extend substantially horizontally in the front-rear direction, and is supported by the left and right support frames 2 via support arm portions 81 as shown in FIG. Each plate mounting member 80 has an upper collar portion 82 that projects along an upper edge portion thereof, and a lower collar portion 83 that faces the lower side of the upper collar portion 82 with a certain gap therebetween. The upper flange portion 82 and the lower flange portion 83 of each plate mounting member 80 are disposed so as to face each other.

  Each upper collar part 82 is formed with a screw hole penetrating in the vertical direction, and a fixture 84 having a screw part screwed into these screw holes is screwed in. Both end portions of the partition plate 70 can be inserted between the upper flange portion 82 and the lower flange portion 83 of the left and right plate mounting members 80 from the insertion side edge portion 72 side.

  At the time of printing, both end portions of the partition plate 70 are inserted between the upper collar portion 82 and the lower collar portion 83 of the left and right plate mounting members 80, and the fixing member 84 is screwed into the partition plate 70. Is supported and fixed substantially horizontally in a removable state. The partition plate 70 may be simply inserted into the plate mounting member 80 without being fixed.

  By doing so, as shown in FIG. 5, the partition plate 70 has its front end close to the outer peripheral surface of the plate cylinder 40 from the second press contact portion 46 to the first press contact portion 45, and is printed with the finisher roll 50. It arrange | positions so that it may partition with the web W made. That is, a space that is located in front of the plate cylinder 40 and that extends downstream of the printing portion in the rotation direction of the plate cylinder 40 (a space that extends below the partition plate 70: the local space LS) is partitioned by the partition plate 70.

  FIG. 8 shows a state in front of the plate cylinder 40 during printing. At the time of printing, the local space LS is further partitioned by the pan cover 100 so that the local space LS is simply partitioned from the work space S.

(Pan cover 100)
9A to 9C show the structure of the pan cover 100. FIG. The pan cover 100 includes a lower plate 101, a front plate 102, a pair of side plates 103 and 103, a buffer duct 104, and the like. As shown in FIG. 3, the pan cover 100 includes a container-like cover that is sufficiently longer in length than the plate cylinder 40, the finisher roll 50, and the ink pan 4. The structure of the pan cover 100 is an example, and can be changed as appropriate according to the specifications.

  As shown in FIG. 9A, the lower plate 101 is a rectangular flat plate that is larger than the ink pan 4 and is longer to the left and right. The lower plate 101 is installed below the ink pan 4 in a state of spreading substantially horizontally. As shown in FIG. 8, the front plate 102 is composed of a strip plate having a length substantially the same as the long side of the lower plate 101, and is swingably attached to the front edge of the lower plate 101 via a hinge.

  As shown in FIGS. 8 and 9B, each side plate 103 is a plate having a length substantially the same as the short side of the lower plate 101, and is erected on each side edge of the lower plate 101. Each side plate 103 is formed so as not to contact the plate cylinder 40 and the finisher roll 50. The ink bleed port 4a protrudes outward from the pan cover 100, and the front plate 102 is arranged so as to be biased toward the one side plate 103 so as not to interfere with the ink bleed port 4a. The end of the front plate 102 is held in contact with the front end of the side plate 103 by a magnet or the like. By swinging the front plate 102, the front of the local space LS can be opened.

  The buffer duct 104 has a rectangular box-like hollow structure and is provided below the lower plate 101. The buffer duct 104 is disposed below the local space LS and extends left and right along the local space LS. Maintenance openings 104c are formed at a plurality of locations on the front surface portion 104a of the buffer duct 104, and these openings 104c are sealed by screwing the cover plate 104b.

  Specifically, as shown in FIG. 9B, the lower edge of the opening 104c is formed without a step by the upper surface of the lower surface portion 104e of the buffer duct 104. The cover plate 104b has an L-shaped cross section, and includes a front plate portion 104b1 facing forward and a lower plate portion 104b2 facing downward. The front plate portion 104b1 is screwed to the front surface portion 104a from the front, and the lower plate portion 104b2 is screwed to the lower surface portion 104e from below.

  Thus, by removing the cover plate 104b from the buffer duct 104, even if ink flows down into the buffer duct 104, it can be easily removed through the opening 104c. Therefore, the cleanliness of the buffer duct 104 is improved.

  As shown in FIG. 9C, two communication holes 105, 105 are formed in the rear surface portion 104 d of the buffer duct 104 with a gap therebetween. One of the communication holes 105 is disposed at a position on one end side in the longitudinal direction of the buffer duct 104, and the other communication hole 105 is disposed at an intermediate position in the longitudinal direction of the buffer duct 104. Two joints 106 and 106 are provided on the outer side of the rear surface portion 104 d of the buffer duct 104 so as to correspond to the communication holes 105. An exhaust pipe 107 (an example of an exhaust passage) is connected to the joints 106 and 106, and the exhaust pipe 107 communicates with the inside of the buffer duct 104 through the communication hole 105. The exhaust pipe 107 is connected to an exhaust device 110 installed at a position away from the gravure printing machine 1.

  As shown in FIG. 9A, a box-shaped relay duct 109 is attached to the side surface of the buffer duct 104 on the other end side in the longitudinal direction. The inside of the relay duct 109 communicates with the inside of the buffer duct 104. On the front surface of the relay duct 109, a communication hole 105a and a joint 106a corresponding to the communication hole 105a are provided. An exhaust pipe 107 is also connected to the joint 106a. By providing such a relay duct 109 and exhausting air, the exhaust can be performed more effectively than when only the buffer duct 104 is used.

  As shown in FIGS. 9A and 9B, the lower plate 101 is formed with an air inlet 108 that allows the local space LS and the inside of the buffer duct 104 to communicate with each other. The air inlet 108 is formed in an elongated shape below the local space LS of the lower plate 101 and extends left and right along the local space LS.

  Note that the intake port 108 may be formed of a plurality of holes or partially closed as long as the intake port 108 is formed to be elongated as a whole. Further, the air inlet 108 may be disposed at the back so as to extend along the rear surface portion 104d, instead of being disposed at the intermediate portion in the width direction of the buffer duct 104. By doing so, the vapor of the solvent flowing down along the ink pan 4 can be introduced into the intake port 108 more effectively.

  At the time of printing, the exhaust device 110 operates and exhausts with a predetermined suction pressure. Thereby, the air in the local space LS is exhausted through the intake port 108, the buffer duct 104, and the exhaust pipe 107. Since the local space LS extends long and narrow along the plate cylinder 40, the suction pressure of the exhaust gas acts unevenly, which may cause exhaust failure.

  On the other hand, in this gravure printing machine 1, since the buffer duct 104 and the intake port 108 are provided so as to extend along the local space LS, the bias of the suction pressure acting on the local space LS can be reduced. As a result, even if the local space LS is long and narrow, it can be exhausted in a well-balanced manner, so that the solvent vapor can be efficiently exhausted in the necessary and minimum space.

  The pan cover 100 is formed to be sufficiently longer than the finisher roll 50 and the ink pan 4. Accordingly, a certain space exists between each end of the finisher roll 50 and each side of the ink pan 4 and each side plate 103 of the pan cover 100 (side space SS: FIG. 8). reference).

  Since both side portions inside the pan cover 100 are also connected to the local space LS, the vapor concentration of the solvent tends to be high. On the other hand, in this gravure printing machine 1, since the side spaces SS are provided on both sides thereof, the solvent vapor can be exhausted more efficiently.

  Since a wide space above the partition plate 70 is opened to the work space S, the print site can be easily visually confirmed, and the print state can be confirmed without any trouble.

  In addition, by arranging the partition plate 70 in this manner, it is possible to prevent the printed web W from being soiled by the ink scattered from the finisher roll 50.

  Since the size of the partition plate 70 in the short direction is larger than the diameter of the finisher roll 50, most of the ink scattered from the finisher roll 50 can be received by the partition plate 70.

  Since the partition plate 70 is detachably fixed to the plate mounting member 80, the plate cylinder 40 and ink can be easily replaced, and the printing switching time can be shortened.

  Since the partition plate 70 is formed of a thin metal plate mainly composed of aluminum, even if the partition plate 70 has a large size, the weight can be reduced to 3 kg or the like. The work burden on the operator OP can be reduced.

  If a long and large plate member is formed of a thin metal plate mainly composed of aluminum, the rigidity may be reduced and the plate member may be easily deformed. On the other hand, in the partition plate 70, since the support side edge 71 and the insertion side edge 72 are provided, the rigidity is structurally enhanced. Therefore, it is possible to reduce the weight of the partition plate 70 while suppressing a decrease in rigidity.

  Moreover, the partition plate 70 of the gravure printing machine 11 is supported in a state of being suspended above the work space S by a plate support device 90 as shown in FIG. Therefore, when the partition plate 70 is fixed to the plate mounting member 80, the partition plate 70 is pulled down and the winding wire 91a is pulled out from the winder 91, as shown in FIG. What is necessary is just to attach to the member 80. Since the partition plate 70 can be handled with a weak force, the work load on the operator OP can be reduced, and the work time can be reduced safely.

  When the partition plate 70 is removed from the plate mounting member 80, such as when switching printing, the winding wire 91a is wound around the winder 91, and the partition plate 70 is automatically suspended at a predetermined position. It becomes a state. Therefore, it is not necessary to carry out or carry in the partition plate 70 from the work space S, and the work burden on the operator OP and the work time can be further reduced.

  By attaching each winder 91 to the reinforcing plate 12b provided on the side surface of the front cover 11F, the winder 91 and the partition plate 70 slide in the front-rear direction together with the front cover 11F. Therefore, the partition plate 70 does not get in the way during maintenance work or the like inside the dryer 10.

  The disclosed technology is not limited to the above-described embodiment, and includes other various configurations. The material of the partition plate 70 is not limited to aluminum alloy or the like. It may be made of plastic or may be made of other metals such as stainless steel.

  The winding tool 91 does not always wind up the whole winding wire 91a, but it is good to wind up the winding wire 91a as needed. For example, the winding of the drawn-out winding wire 91a may be started by performing a predetermined operation such as pulling out the winding wire 91a small and strongly.

1 Gravure printing machine 1
2 Support frame 4 Ink pan 4
DESCRIPTION OF SYMBOLS 10 Dryer 11 Dryer cover 11a Lower end part 20 Upstream side guide roll 21 Downstream side guide roll 21a Cooling roll 30 Impression cylinder 40 Plate cylinder 40
41 Intaglio 45 First pressure contact portion 46 Second pressure contact portion 50 Furnisher roll 60 Doctor support device 61 Doctor blade 70 Partition plate 70 (upper cover)
71 Support side edge 80 Plate mounting member 80 (mounting member)
90 Plate support device 90 (support device)
91 Winding tool 91a Winding wire 92 Relay wire 100 Pan cover (lower cover)
101 Lower plate 104 Buffer duct 108 Intake port 110 Exhaust device J1, J2, J3 Rotating shaft F Floor surface OP Operator S Work space LS Local space W Web

Claims (4)

A gravure printing machine,
An ink pan for storing ink;
A finisher roll that rotates in a state where the lower part is immersed in the ink accumulated in the ink pan,
In a portion other than the lower portion of the finisher roll, the plate cylinder that rotates in a state in which the outer peripheral surface of the finisher roll is in pressure contact with each other,
The plate cylinder and the outer peripheral surface of each plate are pressed against each other, and a pressure cylinder that rotates while sandwiching a web to be printed,
A doctor blade whose tip is in contact with the outer peripheral surface of the plate cylinder from the pressure contact portion with the furnisher roll toward the pressure contact portion with the impression cylinder;
A local exhaust structure for exhausting air around the plate cylinder;
With
The local exhaust structure is
The top end is close to the outer peripheral surface of the plate cylinder from the pressure contact portion with the pressure drum to the pressure contact portion with the finisher roll, and is arranged so as to partition the finisher roll and the web. A cover,
A lower cover that is installed below the ink pan and configured to partition a local space that extends below the upper cover;
An exhaust device connected to the local space via an exhaust passage;
A gravure printing machine. In the gravure printing machine according to claim 1,
The lower cover is
A lower plate installed below the ink pan;
A buffer duct provided below the lower plate so as to extend along the local space and connected to the exhaust passage;
An air inlet that communicates the local space with the buffer duct;
Have
A gravure printing machine, wherein the intake port is formed in an elongated shape on the lower plate so as to extend along the local space. In the gravure printing machine according to claim 1 or 2,
The gravure printing machine, wherein the upper cover is detachably attached to an attachment member provided in the vicinity of the plate cylinder. In the gravure printing machine according to claim 3,
The local exhaust structure further includes a support device that supports the upper cover,
The support device is
A linear member having a predetermined length and connected to the upper cover;
A winder that winds up the linear member and that can be pulled out by a manual operation;
Have
When the upper cover is removed from the mounting member, the upper cover is suspended from the linear member wound around the winder, and is positioned above the plate cylinder. Is a gravure printing machine.

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