JP3002218U - Ink supply / collection mechanism for corrugated board printing machine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an ink supply / recovery mechanism capable of suitably supplying ink to an ink reservoir and rapidly recovering the ink remaining in the reservoir when the order is changed. In a printing machine for transferring ink to a printing plate 42 and passing a corrugated paperboard sheet 43 between a plate cylinder 44 and an impression cylinder 46 for printing, an ink transfer in which the printing plate of the plate cylinder comes into contact with each other to rotate when approaching. A roll 50, a squeeze roll 52 that rotates in contact with the roll 50 to adjust the amount of ink, a tubing pump 95 disposed above these roll groups and urged in the reverse direction by a reversible motor 96, and this pump. And a pump 60 having one opening 60a facing the ink supply section 58 and the other opening facing the ink storage section A, and the pump 95 so as to be movable integrally. And an elevating and lowering drive mechanism 99 for elevating and lowering the opening 60b facing the ink storage portion of the tube.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an ink supply / collection mechanism of a corrugated board sheet printing machine, and more specifically, it relates to a corrugated board printing using a glycol-based ink having a low viscosity and a high quick-drying property, which is newly developed by the applicant. Ink supply / recovery mechanism according to a new proposal that can always supply suitable ink to the ink storage part of the machine and can quickly recover the ink remaining in the storage part when the order is changed. It is about.

[0002]

[Prior art]

 Conventional printing machines for corrugated cardboard sheets can be generally classified into two types. That is, the vertical rotary printing press shown in FIG. 7 and the flexographic printing press shown in FIG. 8 have different configurations depending on the properties of the ink used, and have advantages and disadvantages as described later. Are almost in conflict. First of all, the vertical rotary printing press is named because the corrugated cardboard sheet is passed in the longitudinal direction at a right angle to the step. However, at present, it is widely used in printers / slotters that carry out processes such as slotting as well as printing horizontally through corrugated board sheets.In the industry, it is called a Prislo printing machine. The common name shall be followed. This Prislo printing machine uses a glycol-based ink having a high viscosity, kneads the ink with many rubber rolls to make it uniform, and then transfers the ink to a printing plate mounted on a plate cylinder. For example, FIG. 7 shows various roll groups of a Prislo printing machine, in which a corrugated cardboard sheet 16 is appropriately passed between a plate cylinder 12 on which the printing plate 10 is mounted and an impression cylinder 14 which faces the plate cylinder 12. Is printed. Further, the ink in the ink reservoir 20 is transferred to the printing plate 10 via the calling roll 22, the intermediary roll 24 and the series of transfer roll groups 18.

The above-mentioned Prislo printing machine has its own advantages and disadvantages, which are listed below. It can be said that these advantages and disadvantages are basically due to the use of a high viscosity glycol ink. <Advantages> (a) Since the sheet is printed in a raised form on the sheet surface, the finish of printing has gloss. (b) Ink can be consumed only because it is necessary to supply ink only to the required areas of the printing plate (the ink is not circulated). (c) When changing colors, the ink on the roll is simply removed by scraping. Therefore, order change can be done in a short time, and various small quantities of small lot printing can be supported. Also, unlike flexographic printing, which will be described later, almost no cleaning waste liquid is produced, so there is no need to install a waste liquid treatment facility that increases costs. <Disadvantages> (a) Glycol-based inks of recent years are mainly quick-drying inks, and recently, further improvement has been made to that extent. However, compared to the flexographic printing described below, it takes a considerable amount of time to dry after printing. Therefore, it cannot be directly connected to die cutter or folder gluer in the subsequent process. (b) Since it is necessary to uniformly knead high-viscosity ink, the roll for ink transfer has multiple stages and the mechanism becomes complicated. When the rolls are worn, complicated work is required to adjust the distance between the rolls. (c) When ink is supplied, the amount of ink transferred to the sheet is large, so it is printed darkly, and as ink is consumed, the amount of ink transferred to the sheet is reduced and printed lightly, and therefore uneven printing is likely to occur. . For this reason, the operator constantly needs to monitor the density and thinness of the color, and perform complicated operations such as supplying ink when the color becomes light.

Next, a flexographic printing machine uses a low-viscosity water-based ink that is rich in fluidity, unlike a Prislo printing machine, and is characterized by extremely fast ink drying. For example, FIG. 8 schematically shows various roll groups of a flexographic printing machine, in which a corrugated paper sheet 16 is provided between a plate cylinder 12 on which the printing plate 10 is mounted and an impression cylinder 14 which is arranged to face the plate cylinder 12. Then, appropriate printing is performed. An ink roll 26 and a squeeze roll 28 are rotatably arranged near the plate cylinder 12, and the ink supplied between the rolls 26 and 28 is transferred to the printing plate 10 of the plate cylinder 12 by the ink roll 26. Is transferred via. Since flexo ink is extremely quick-drying, it must be constantly circulated to prevent it from drying and solidifying, unlike the above-mentioned Prislo printing. Therefore, as shown in FIG. 9, the ink in the tank 30 is supplied between the two rolls 26 and 28 via the pump 32 and the supply pipe 34, and the ink accumulated therein is collected in the two rolls 26. A circulation mechanism is used to collect the water from both ends of the tank 28, 28 through the dams 36, 36 and the recovery pipe 38 into the tank 30.

The advantages and disadvantages of the flexographic printing machine described above are listed below. These strengths and weaknesses are also due to the properties of the inks used, namely low viscosity and high fast-drying properties. <Advantages> (a) Since a quick-drying ink is used, it can be immediately sent to the next step such as die cutter or folder gluer after printing. (b) Since the ink is spread over the entire space between the ink roll and the squeeze roll, color unevenness in the width direction does not occur during printing. Therefore, the operator does not need to constantly monitor the print status. (c) The ink transfer mechanism is extremely simple. <Disadvantages> (a) Since a system that constantly circulates the ink is used, it is necessary to wash the roll and circulation system with a large amount of water when changing colors. Therefore, complete recovery of ink is not possible and causes a considerable loss, and from the standpoint of pollution prevention measures, a treatment facility for cleaning waste liquid is required, resulting in high costs. (b) Since it takes time to change colors, it is not suitable for printing small lots of various types and small amounts. (c) It is less glossy than Prislo printing.

[0006]

[Problems to be solved by the device]

 As described above, the Prislo printing machine and the flexographic printing machine respectively have the advantages and the disadvantages which are almost contradictory to each other depending on the properties of the ink used. In the industry, attention has been paid to the advantages of the flexographic printing machine described above, and the conversion from the prism printing machine to the flexographic printing machine has been widely carried out. In other words, although the flexographic printing machine has its own drawbacks, it can be said that the industry has recognized that there are merits to be introduced from the Prislo printing machine, even if it is taken into consideration. By the way, the recent industry is under pressure to handle small lots that process a wide variety of small quantities of corrugated board sheets, and this tendency is becoming more pronounced year by year. Considering this with regard to printing machines, it means that it is necessary to change colors within a limited time in order to support printing of various types and small amounts of corrugated board sheets. However, with respect to the frequent request for order change associated with the printing of the small lots, as described above in the disadvantage of the flexographic printing machine, it is insufficient to take time to change the color. There is also an inherent problem of treating cleaning waste liquid.

For such a small lot printing, since the color change time is short, the above-mentioned Prislo printing machine can be preferably used. However, the Prislo press requires the experience and intuition of the operator to maintain the optimum printing condition, and it takes time to dry after printing and it does not directly connect to the subsequent process. ing. Therefore, users are not always satisfied with the above-mentioned Prislo printing machines for the small lot printing of various types and small quantities, which is increasing recently, and the color change time is shorter than that of flexographic printing. The passive printing machine is used only for negative reasons. Conversely speaking, the color change time is shortened and it is possible to handle small lot printing sufficiently, the operator does not need constant monitoring during printing, and after printing, it has a function that can be directly connected to the subsequent process. Although there is a strong user demand for printing machines, the reality is that it has not yet been realized. In order to put into practical use a printing machine that has the advantages of so-called Prislo and flexo printing, the key point is to develop an ink that meets the above specifications. Similarly, both types of printing machines depended on the properties of the ink used.) In this regard, the applicant made a tie-up with an ink maker to meet the above-mentioned potential demand from the user side, and as a result of fundamental improvement from the improvement of the ink itself, as a result, the low viscosity and quick-drying property similar to flexo ink Succeeded in developing a glycol-based ink with and.

However, as a result of various tests of the newly developed ink, it was found that the conventional Prislo printing machine cannot bring out the characteristics of the ink to the maximum. Although it is possible to use the ink in a flexographic printing machine, it is not necessary to circulate the ink because the ink is not as low in viscosity and quick-drying as the original flexographic ink. Therefore, there is no point in providing an ink circulation mechanism unique to flexographic printing machines, and even when changing colors, cleaning time is required and small lots cannot be handled, resulting in waste of ink. . As described above, each type of printing machine adopts a structure that exhibits the characteristics of high-viscosity glycol-based ink and low-viscosity water-based ink, so this is only natural. .

Therefore, the applicant who provides the user with a printing machine for corrugated cardboard sheets has proposed the invention “printing on corrugated cardboard sheets” for the printing machine according to the new concept that can maximize the characteristics of the ink according to this new development. Printing method and device ”. The printing device according to the previous application uses a mechanism that transfers ink to the printing plate and a new mechanism that cleans the ink when changing colors, which reduces the amount of ink consumed during printing operation and reduces the printing order. It is possible to quickly change the ink due to changes such as the above, and it is also possible to directly connect to the subsequent process, and to make clear and beautiful printing on the corrugated cardboard sheet. With regard to the printing method and apparatus according to this new proposal, it is necessary to appropriately supply the printing ink to the ink storage section and to collect the old ink from the ink storage section when the printing order is changed. Since the ink supply / recovery mechanism of the above cannot handle this, it was necessary to newly develop this.

[0010]

[The purpose of the device]

 This invention makes it possible to always supply the ink to the ink storage area in a suitable manner when the printing machine for corrugated board sheets that can maximize the characteristics of the newly developed ink is put to practical use. In this case, it is an object to provide an ink supply / recovery mechanism that can quickly recover the ink remaining in the storage section.

[0011]

[Means for Solving the Problems]

 In order to overcome the above-mentioned problems and achieve the intended purpose, the ink supply / recovery mechanism of the corrugated board sheet printing machine according to the present invention includes a plate cylinder on which a printing plate is mounted, and a pressure plate arranged opposite to the plate cylinder. A cylinder is provided to transfer the ink to the printing plate, and a corrugated cardboard sheet is passed between the plate cylinder and the impression cylinder rotating in opposite directions to perform desired printing on the sheet. In a corrugated board printing machine, an ink transfer roll which is arranged so as to be close to and away from the plate cylinder and rotates in contact with the printing plate of the plate cylinder when the plate cylinder comes close to the plate transfer roller, and the ink transfer roll is always operated during operation. A squeeze roll that contacts and rotates to adjust the squeeze amount of the ink, and is arranged above the ink transfer roll and the squeeze roll, which can move in parallel in the longitudinal direction of the roll and forward and reverse bias by a reversible motor. Done And a tubing pump that is detachably inserted in the tubing pump so that one opening faces the ink supply section and the other opening faces the ink storage section defined between the two rolls. It comprises a flexible tube and a lifting drive mechanism which is provided so as to be movable integrally with the tubing pump and which is connected to the flexible tube and lifts and lowers an opening of the tube facing the ink reservoir. The opening of the flexible tube is always located at the ink ejection position above the ink reservoir, and the reversible motor is driven in one direction so that the ink in the ink supply unit is removed. And by driving the elevating drive mechanism to lower the flexible tube, the opening is immersed in the residual ink in the ink storage section, The residue inks are reversed to a reversible motor, characterized by being configured so as to recover the ink supply unit.

In order to overcome the problems and achieve the intended purpose, an ink supply / recovery mechanism of a corrugated board sheet printing machine according to another invention of the present application includes a plate cylinder equipped with a printing plate and An impression cylinder disposed opposite to the plate cylinder, transferring ink to the printing plate, and passing a corrugated cardboard sheet between the plate cylinder and the impression cylinder rotating in opposite directions to each other, In a corrugated board sheet printing machine configured to perform required printing, an ink transfer roll that is disposed so as to be close to and away from the plate cylinder and that rotates when contacting the printing plate of the plate cylinder when the plate cylinder comes close to the plate transfer roller. When the ink transfer roll is in operation, the tip is always in contact with it to adjust the amount of ink, and a diaphragm adjustment plate is provided above the ink transfer roll and the diaphragm adjustment plate. Flat in the direction A tubing pump that can move and is urged forward and backward by a reversible motor, and is detachably inserted in the tubing pump so that one opening faces the ink supply section and the other opening transfers the ink. A flexible tube facing an ink reservoir defined between the roll and the diaphragm adjustment plate, and a tubing pump that are movable together with the flexible tube. The flexible tube includes an elevating and lowering drive mechanism for elevating and lowering the opening facing the storage section. The opening of the flexible tube is always located above the ink storage section at the ink ejection position and drives the reversible motor in one direction. To supply the ink in the ink supply section to the ink storage section and drive the elevating drive mechanism to lower the flexible tube. Accordingly, the opening with is immersed in a residual ink in said ink reservoir, the residual ink are reversed to the reversible motor, characterized by being configured so as to recover the ink supply unit.

[0013]

【Example】

 Next, the ink supply / recovery mechanism of the corrugated board sheet printing machine according to the present invention will be described below with reference to the accompanying drawings, with reference to preferred embodiments. FIG. 1 is a schematic side view of a printing machine equipped with an ink supply / collection mechanism according to an embodiment, showing a printing state on a corrugated cardboard sheet, and FIG. 4 is an ink washing after the printing of the printing machine is completed. It is a schematic side view which shows a state. The printing machine 40 shown in the figure has a plate cylinder in which a printing plate 42 is detachably mounted between machine frames 51, 51 (only a part of which is shown) that are separated by a predetermined distance in a direction intersecting the feeding direction of a corrugated board sheet 43. 44 and a pressure drum 46 arranged to face each other below the corrugated board sheet 43 with the path line interposed therebetween. The plate cylinder 44 and the pressure drum 46 are rotated in opposite directions to each other.

An ink transfer mechanism 48 for transferring ink to the printing plate 42 is arranged above the plate cylinder 44. The ink transfer mechanism 48 includes an ink transfer roll 50 that transfers the supplied ink directly to the printing plate 42, a squeeze roll 52 that is pressed against the roll 50 to adjust the amount of ink, and a rotary shaft of the squeeze roll 52. It is basically configured by a swinging mechanism 53 capable of displacing the ink transfer roll 50 in a required angle range centering around. Then, by selectively operating the swinging mechanism 53, the ink transfer roll 50 is brought into contact with the printing plate 42 to transfer ink to the printing plate 42, as will be described later, and the printing plate 42. The ink can be moved away from the ink cleaning position where the ink transfer is disabled. That is, the ink transfer roll 50 is disposed so as to be able to move toward and away from the plate cylinder 44, and when it comes close to the plate cylinder 44, it can come into contact with the printing plate 42 mounted on the plate cylinder 44 and rotate. Anilox is formed on the surface of the ink transfer roll 50 by forming fine depressions in a desired pattern. These fine depressions store a certain amount of ink and prevent ink from scattering during roll rotation. It's working to do it. Although an iron-based metal material is used for the ink transfer roll 50, a ceramic film may be formed on the surface of the metal roll by explosive spraying or the like, and the ceramic film may be engraved with anilox. Further, as the ink transfer roll 50, an iron roll not engraved with anilox (one plated only) or a simple rubber roll can be preferably used.

The squeezing roll 52 disposed adjacent to the ink transfer roll 50 is in constant contact with the ink transfer roll 50 during operation, and rotates at the same speed or at a low speed as the ink transfer roll 50 to transfer the ink. It functions to adjust the squeeze of the excess ink on the surface of the roll 50. The squeeze roll 52 is preferably made of a ferrous metal material or a flexible material such as rubber. When a rubber-based material is used, it is recommended that its hardness be appropriately selected within the range of, for example, a Shore hardness of 50 to 75 degrees depending on the length of the roll.

The ink transfer mechanism 48 including the ink transfer roll 50 and the squeeze roll 52 is provided with a swinging mechanism 53 that can displace the ink transfer roll 50 about a rotation axis of the squeeze roll 52 within a required angle range. ing. That is, support brackets 62, 62 (only one of which is shown) are rotatably supported at both shaft ends of the squeezing roll 52 rotatably arranged in the machine frames 51, 51, which face the inside of the machine frame 51. An ink transfer roll 50 is rotatably supported between the support brackets 62, 62. A holding member 64 is provided at the upper end of the support bracket 62 on the side where the ink transfer roll 50 is pivotally supported, and is eccentrically mounted on a switching shaft 66 that is rotatably supported by the machine frames 51, 51. A corresponding eccentric ring 68 is rotatably supported on each holding member 64. The switching shaft 66 is rotationally driven by a motor or an air cylinder (not shown). Therefore, by urging the motor or the air cylinder to rotate the eccentric wheels 68, 68 at a predetermined central angle, the ink transfer roll 50 is brought into contact with the printing plate 42 to transfer the ink, as shown in FIG. It is possible to select an ink transfer position to be performed and an ink cleaning position where the transfer of ink is disabled by separating from the printing plate 42 as shown in FIG. A mechanism for imparting different rotations to both rolls 50 and 52 is known per se, and therefore its explanation is omitted.

In the ink transfer roll 50 and the squeeze roll 52, when the two rolls 50, 52 are brought into pressure contact with each other, the ink reservoir A can be defined in the contact region in the longitudinal direction of these two rolls. There is. A supply / collection device 54 that supplies ink to the ink storage portion A and collects the ink remaining in the storage portion A is disposed above the rolls 50 and 52. If the amount of ink supplied during printing is too small, the printed surface may be scratched or missing. Therefore, as shown in FIG. 2, the supply / collection device 54 is adapted to supply the ink mainly to the required places by adjusting the ink supply amount to the design of the printed matter. That is, a horizontal girder 85 which is parallel to both rolls 50 and 52 is installed between the upper ends of the machine frames 51 and 51, and a guide rail 86 formed on the upper surface of the horizontal girder 85 is provided with a movable base via rollers 87 and 87. 88 is movably supported. A pair of sprockets 89, 89 are rotatably supported by the transverse beam 85 at predetermined intervals in the longitudinal direction, and one of the sprockets 89 is configured to be normally and reversely rotated by a drive motor 90. . An endless chain 91 is wound between both sprockets 89, 89, and a required part of the endless chain 91 is fixed to the moving base 88. Therefore, by driving the drive motor 90 forward and backward to drive the endless chain 91, the movable base 88 reciprocates along the guide rail 86 as the chain 91 travels.

As shown in FIG. 2, the moving base 88 is provided with a substantially U-shaped bracket 92 that hangs above the squeeze roll 52, and an ink in which a predetermined amount of ink is stored in the bracket 92. The pot 58 is detachably attached. A support plate 94 is disposed above the ink pot 58 of the bracket 92, and a tubing pump 95 and a reversible motor 96 that drives the pump 95 are disposed on the support plate 94. A flexible tube 60 is detachably inserted in the tubing pump 95, and one opening 60a of the tube 60 is immersed in the ink stored in the ink port 58. The other opening 60b of the flexible tube 60 faces above the ink reservoir A. The basic structure of the tubing pump 95 is known, and the ink in the tube is pushed out in a predetermined direction by squeezing the flexible tube 60 by a roller 97 moving along a predetermined orbit. Is. When the reversible motor 96 is urged in the forward direction to move the roller 60 of the tubing pump 95 in the clockwise direction, the ink in the flexible tube 60 is pushed out to the opening 60b side, which causes the ink pot 58. The ink is supplied to the ink storage section A. When the reversible motor 96 is biased in the reverse direction to move the roller 97 in the counterclockwise direction, the ink in the flexible tube 60 is extruded toward the opening 60a side, whereby the ink in the ink reservoir A is discharged. It is set to collect in the pot 58. Therefore, by moving the moving base 88 by the drive motor 90, the opening 60b of the flexible tube 60 is moved in the axial direction of the rolls 50, 52, and then the reversible motor 96 is rotated in the forward direction. If it is urged to, the ink can be supplied mainly to the required places. As described above, the ink used in the printing machine 40 is a glycol-based ink that has been newly developed by the applicant and has a low viscosity and is highly quick-drying. It is necessary to circulate the ink like a flexographic printing machine. There is no.

As shown in FIG. 1, a holder 98, into which the flexible tube 60 extending to the right of the tubing pump 95 is inserted, is vertically mounted on the bracket 92, and the holder 98 is inserted into the holder 98. The lower end opening 60b that is inserted and hangs down faces the ink storage portion A. Further, an air cylinder 99 is arranged upside down on the bracket 92, and a holder 98 is connected to the piston rod 99a of the bracket 92 so that the cylinder 99 can be biased forward and backward to displace the height position of the opening 60b. There is. That is, when the ink is changed due to the change of the printing order, the opening 60b of the flexible tube 60 can be dipped in the ink of the old order remaining in the ink reservoir A. Then, if the reversible motor 96 is biased in the reverse direction in this state, the ink remaining in the ink reservoir A can be collected in the ink pot 58 (see FIG. 3). Reference numeral 100 denotes a guide that supports the flexible tube 60 that hangs down from the holder 98 and stably faces the opening 60b above the ink storage portion A. Further, as a means for changing the height position of the opening 60b, the tubing pump 95 itself may be moved up and down by moving up and down the supporting plate 94 via an air cylinder.

Guide rollers 93, 93 are rotatably supported on the bottom surface of the bracket 92, and the guide rollers 93, 93 are, as shown in FIG. 1, arranged in parallel with the rollers 50, 52. The bracket 92 is slidably abutted on the bracket 92 so that the bracket 92 can move smoothly. A cleaning liquid supply pipe (not shown) is arranged on the bracket 92, and the opening of the cleaning liquid supply pipe faces the ink storage portion A. A cleaning liquid tank, which is arranged at an appropriate fixed position, is connected to the cleaning liquid supply pipe via a pipe (none of which is shown), and the cleaning liquid stored in the tank is pumped to the supply pipe by compressed air. It is supposed to be done. That is, the supply / collection device 54 travels horizontally along the guide rails 86 during the printing operation, and supplies ink to the above-described ink storage portion A via the flexible tube 60. In addition, when the color of the corrugated board sheet 43 is changed due to the change of the printing order, the ink of the old order remaining in the ink storage portion A is collected and the cleaning liquid is supplied to the storage portion A through a cleaning liquid supply pipe (not shown). Is configured.

As shown in FIG. 1, an air cylinder 72 is placed upside down on the support bracket 62 via a support member 70, and a plate-like dam member 74 is arranged on a piston rod 72 a of the air cylinder 72. There is. As shown in FIG. 2, the dam member 74 is lowered by the urging of the air cylinder 72 during the printing operation. The dam member 74 is brought into close contact with the axial ends of the ink transfer roll 50 and the squeezing roll 52 to close the ink storage portion A defined between the rolls 50 and 52. The ink and the cleaning liquid supplied from the supply / collection device 54 can be stored in the storage portion A (see FIG. 1). When cleaning the ink, the dam member 74 is lifted by the reverse biasing force of the air cylinder 72 to open the ink storage portion A, and the cleaning waste liquid that has washed away the ink remaining in the storage portion A is longitudinally moved. It is constructed so that it can be discharged from both ends (see FIG. 4). A gutter member 76 is disposed below both axial ends of the ink transfer roll 50 and the squeeze roll 52, and the ink cleaning water flowing out from the ink storage portion A by the opening operation of the dam members 74, 74 is used for the gutter member. The ink is received by 76 and collected in an ink pan 78 described later.

A scraper 80 made of a long blade-shaped plate for cleaning the ink when changing colors such as order change is disposed at a position approximately tangential to the squeeze roll 52. There is. The scraper 80 has its tip oriented along the tangential direction in a direction opposite to the rotation direction of the squeeze roll 52, and can be normally and reversely rotated by an appropriate motor 82 to come in contact with and separate from the roll surface. ing. When cleaning the ink, the rocking mechanism 53 provided in association with the ink transfer mechanism 48 is operated to move the ink transfer roll 50 around the rotary shaft of the squeeze roll 52 as shown in FIG. By displacing it in the clockwise direction, it faces the ink cleaning position separated from the printing plate 42. Then, the motor 82 is energized to bring the scraper 80 into contact with the squeezing roll 52, whereby the ink transferred to the roll 52 is scraped up and removed. The removed ink is collected in an ink pan 78 provided below the scraper 80. Further, a waste liquid pipe 84 communicating with a waste liquid tank (not shown) is connected to the ink pan 78, and the waste liquid collected in the ink pan 78 is collected in a waste liquid tank provided at a required portion. The cleaning waste liquid discharged to the gutter member 76 may be directly guided to the waste liquid tank without passing through the ink pan 78.

For the scraper 80, a ferrous metal material or a flexible material such as rubber is appropriately selected. When the squeezing roll 52 is made of a flexible material such as rubber, it is recommended that the scraper 80 be made of a material having a hardness lower than that of the roll 52 (for example, a rubber plate having a low hardness). This prevents the squeeze roll 52 from being damaged when the scraper 80 is brought into contact with the squeeze roll 52 to scrape the ink. In this case, it is not always necessary that the entire scraper 80 be made of a soft material, and a soft material may be separately provided at the tip of the scraper 80 made of a metal material. Further, the scraper 80 in the illustrated example has its tip oriented in a direction opposite to the rotation direction of the squeeze roll 52, but the invention is not limited to this. On the contrary, the scraper 80 may be configured so as to be able to come into contact with and separate from the surface of the roll 52 while being oriented in the forward direction with respect to the rotation direction of the squeeze roll 52. Further, a linear actuator such as an air cylinder can be used as a means for bringing the scraper 80 into contact with and away from the squeezing roll 52.

[0024]

[Operation of the embodiment]

 Next, the operation of the ink supply / recovery mechanism of the corrugated board sheet printing machine having the above-described configuration will be described. As a preparatory work for printing, the swing mechanism 53 described above is operated to displace the ink transfer roll 50 in the clockwise direction around the rotation axis of the aperture roll 52. As a result, as shown in FIG. 1, the ink transfer roll 50 of the ink transfer mechanism 48 is brought into contact with the plate cylinder 44 (printing plate 42). The scraper 80 is also separated from the squeeze roll 52. Further, the dam members 74, 74 provided at both axial ends of both rolls 50, 52 are in the lowered position, and close both longitudinal ends of the ink storage portion A. The flexible tube 60 inserted into the tubing pump 95 of the supply / recovery device 54 has one opening 60a immersed in the ink stored in the ink pot 58, and the other opening 60b formed in the ink storage portion A. Facing above. When the reversible motor 96 is biased in the normal direction in this state, the roller 97 of the tubing pump 95 moves in the clockwise direction, squeezing the flexible tube 60 to push the ink inside to the opening 60b side. That is, the continuous ironing of the tube 60 by the roller 97 causes the ink in the ink pot 58 to pass through the flexible tube 60 between the rotating ink transfer roll 50 and the squeezing roll 52 (ink storage portion A). Is supplied to. This ink is stored in a state of being regulated by dam members 74, 74 facing the shaft ends of both rolls 50, 52.

As a result, an appropriate amount of ink is transferred to the surface of the printing plate 42 mounted on the plate cylinder 44 via the ink transfer roll 50. Under this condition, the corrugated paper sheets 43 are supplied one by one between the plate cylinder 44 and the impression cylinder 46 from an upstream stocker (not shown), so that the required printing is performed on the sheets 43. It Since the ink is quick-drying, it can be sent immediately to the die cutter or folder gluer in the subsequent process after printing. Further, since the ink is spread over the entire space between the ink transfer roll 50 and the squeeze roll 52, color unevenness in the width direction does not occur during printing, and therefore the operator does not need to constantly monitor the printing state.

Here, the consumption amount of the ink stored in the ink storage portion A does not decrease uniformly in the axial direction, but varies depending on the printing position and the printing area of the corrugated board sheet 43. Therefore, in this case, the drive motor 90 is urged to move the movable base 88 along the guide rail 86, and the opening portion 60b of the flexible tube 60 consumes a large amount of ink in the ink storage portion A. Bring it to the place. Then, the ink in the ink pot 58 is supplied to the storage portion A through the tube 60, so that the required amount of ink can be supplied to the location corresponding to the ink consumption amount. As a result, there is an advantage that less ink consumption is required. In addition, since the ink is not circulated, it is possible to omit the ink that was required for conventional circulation, reduce the lot unit when purchasing ink, and reduce inventory costs.

When changing the ink to be used for the color change accompanying the change of the print order, the ink is collected and washed in the following procedure. First, the reversible motor 96 is stopped to stop the ink supply by the flexible tube 60. Further, the air cylinder 99 is urged in the direction in which the rod 99a is extended, the flexible tube 60 is lowered together with the holder 98, and the opening 60b remains in the ink storage portion A as shown in FIG. Immerse in order ink. Next, the reversible motor 96 is urged in the reverse direction to move the roller 97 of the tubing pump 95 counterclockwise, whereby the ink remaining in the ink reservoir A is sucked up through the flexible tube 60. , And is collected in the ink pot 58. As a result, the ink remaining in the storage portion A without being used can be recovered, and the ink can be prevented from being wastefully discarded. At this time, if the bracket 92 is moved in the axial direction of both rolls 50 and 52 and the ink is collected at the same time, the collection time can be shortened.

Next, the air cylinder 99 is reversely biased to raise the opening 60b, and then the swing mechanism 53 is reversely actuated to move the ink transfer roll 50 around the rotation axis of the squeeze roll 52. By shifting in the counterclockwise direction, the ink transfer roll 50 is separated from the plate cylinder 44 (print plate 42) as shown in FIG. Therefore, the motor 82 is energized to bring the scraper 80 into contact with the squeezing roll 52 at an appropriate pressure. When the ink transfer roll 50 and the squeeze roll 52 are idly rotated at the same peripheral speed, the ink adhering to the surface of the squeeze roll 52 is scraped up and removed by the scraper 80, and the ink is collected in the ink pan 78. To be done.

Most of the ink remaining in the ink storage portion A without being recovered by the supply / recovery device 54 is removed by the scraper 80, but a small amount of ink remains in the anilox of the ink transfer roll 50. Remains. Therefore, the scraper 30 is separated from the squeezing roll 52, and the cleaning liquid is supplied to the ink storage portion A defined between the rolls 50 and 52 via the cleaning liquid supply pipe arranged in the supply / collection device 54. To do. Since the reservoir A is closed at both ends in the longitudinal direction by the dam members 74, 74, the cleaning liquid is stored in a state in which it is spread over the entire axial direction. After the cleaning operation is performed for a predetermined time in this state, the weir members 74, 74 are raised to open the ink storage portion A, and the cleaning waste liquid that has washed away the ink remaining on the ink transfer roll 50 is stored in the storage portion. It is discharged from both ends of A to the gutter member 76. Further, this cleaning waste liquid is supplied to the ink pan 78 from the gutter member 76, and is collected from there into a waste liquid tank (not shown). In addition, when supplying the cleaning liquid to the ink storage portion A while moving the bracket 92 in the axial direction of both rolls 50 and 52, the cleaning time can be shortened.

Further, the ink pot 58 mounted on the bracket 92 of the supply / recovery device 54 is replaced with one storing ink for a new order, and the flexible tube 60 is removed from the tubing pump 95. After washing the flexible tube 60 outside the apparatus, it is inserted again into the tubing pump 95, and one opening 60a is dipped in the ink stored in the ink pot 58, and the other opening 60b is opened. The color change is completed by exposing the ink storage unit A above the ink storage unit A. Since the ink pot 58 and the ink storage portion A are in close proximity to each other, the length of the flexible tube 60 is short, so that ink remaining in the tube 60 can be reduced and the tubing pump can be used. Since it is not necessary to wash 95 itself, ink loss can be reduced. In addition, if the washed flexible tube 60 is prepared in advance when the order is changed, the color change can be performed in an extremely short time for replacing the tube 60.

In this way, when the color is changed due to the order change, the ink remaining in the ink storage portion A can be collected, so that the wasteful ink can be suppressed to a very small amount, and the ink can be saved. Further, the ink adhering to the ink transfer roll 50 can be reliably removed by using a very small amount of cleaning liquid after scraping most of the ink with the scraper 80. Furthermore, if the flexible chab is replaced, it is not necessary to clean the pump and the ink circulation system, so order changes can be made in a short time, making it suitable for printing small lots of various small quantities. it can. In addition, the amount of cleaning liquid used for ink cleaning was about 60 liters in the conventional flexographic printing machine, whereas it was about 200 cc when using the newly developed ink, and the cleaning waste liquid was used. It can be suppressed to an extremely low level, and can greatly contribute to pollution prevention.

In cleaning the ink, in addition to the method described above, after collecting the cleaning waste liquid, the scraper 80 is again brought into contact with the squeezing roll 52 to remove the water adhering to the roll 52. May be. After scraping off the ink from the squeezing roll 52 with the scraper 80, the cleaning liquid is supplied between the ink transfer roll 50 and the squeezing roll 52 while the scraper 80 is in contact with the roll 52. Or scraping the ink from the squeezing roll 52, and then once separating the scraper 80 from the roll 52, and observing that the cleaning liquid has spread all over the roll axial direction, squeeze the scraper 80 again. The cleaning waste liquid may be collected in the ink pan 78 by abutting against 52. In this case, most of the ink remaining on the ink transfer roll 50 can be removed via the scraper 80, so that a very small amount of cleaning liquid can be supplied between the rolls 50 and 52. .

[0033]

[About another embodiment]

 5 is a schematic side view of a printing machine according to another embodiment. The basic configuration of the plate cylinder 44, the impression cylinder 46, and the ink supply / collection device 54 is related to FIGS. It is the same as explained. However, the mechanism for transferring the ink to the printing plate 42 is different in the mechanism for adjusting the ink amount of the ink transfer roll 50. That is, on the pair of support brackets 62 and 62 on which the ink transfer roll 50 is rotatably supported, the adjusting plate 110 made of a long plate is provided in the forward direction with respect to the rotation direction of the transfer roll 50. Is oriented along the tangential direction. The adjusting plate 110 is connected to a motor 112, and the distance between the tip of the adjusting plate 110 and the roll surface is adjustable by the forward and reverse biasing of the motor 112 to adjust the amount of ink on the surface of the ink transfer roll 50. Function. The distance between the adjusting plate 110 and the ink transfer roll 50 may be adjusted by a linear actuator such as an air cylinder instead of the motor 112.

In addition, above the ink transfer roll 50 and the adjusting plate 110, an ink reservoir A is defined in the longitudinal direction of both members, and both longitudinal ends of the reservoir A are the weirs described above. The members 74 and 74 are configured to selectively perform closing and opening. The ink reservoir A may be closed and opened at both ends in the longitudinal direction by an air curtain. For example, a pair of air blowing pipes connected to a ventilation source are exposed above the vicinity of both ends of the ink reservoir A, and air is blown from the air blowing pipe toward the reservoir A during printing operation of the printing press. In this way, the ink is blocked. Then, when changing colors due to order changes, etc., by stopping the air blowing from the air blowing pipe, the residual ink and cleaning waste liquid in the ink reservoir A are discharged from the end to the gutter member 76. be able to.

A scraper 80 made of a long plate is disposed at a position close to the ink transfer roll 50, and the scraper 80 is connected to a fluid pressure cylinder 114 and can be brought into contact with and separated from the roll surface. . Then, as shown in FIG. 6, the scraper 80 comes into contact with the ink transfer roll 50, whereby the ink transferred to the roll 50 is removed. The removed ink is collected in an ink pan 78 provided below the scraper 80. The drive source of the scraper 80 may be a motor as in the embodiment shown in FIG. A swing mechanism for displacing the ink transfer roll 50 between an ink transfer position where ink is transferred by contacting the printing plate 42 and an ink cleaning position where the transfer of ink is disabled by separating from the printing plate 42. 53 is basically the same as the embodiment shown in FIG. However, each of the support brackets 62 is rotatably supported by the machine frame via a projecting shaft 116 that projects outwardly (on the side away from the other opposing support bracket 62). Then, by rotating the switching shaft 66, the support brackets 62, 62 rotate about the protruding shafts 116, 116, and the ink transfer roll 50 is moved to the ink transfer position (Fig. 5) and the ink cleaning position (Fig. 6). Is configured to be displaced.

[0036]

[Operation of another embodiment]

 Next, the operation of the corrugated board sheet printing machine according to another embodiment described above will be described. As a preparatory work for printing, as shown in FIG. 5, the ink transfer roll 50 is brought into contact with the plate cylinder 44 (print plate 42) and the scraper 80 is separated from the ink transfer roll 50. The gap between the tip of the adjusting plate 110 and the surface of the ink transfer roll 50 is adjusted to an appropriate value by urging the motor 112. Further, the dam members 74, 74 are in the lowered position, and close both longitudinal ends of the ink storage portion A. Then, when ink is supplied between the adjusting plate 110 and the rotating ink transfer roll 50 through the flexible tube 60 extending from the tubing pump 95, the ink is regulated by the dam members 74, 74. Is stored in the ink storage portion A.

As a result, an appropriate amount of ink is transferred to the surface of the printing plate 42 mounted on the plate cylinder 44 via the ink transfer roll 50. Under this condition, the corrugated paper sheets 43 are supplied one by one between the plate cylinder 44 and the impression cylinder 46 from an upstream stocker (not shown), so that the required printing is performed on the sheets 43. It Since the ink is quick-drying, it can be sent immediately to the die cutter or folder gluer in the subsequent process after printing. Further, since the ink is spread over the entire space between the ink transfer roll 50 and the adjusting plate 110, color unevenness in the width direction does not occur during printing, and therefore the operator does not need to constantly monitor the printing state.

When changing the ink to be used for the color change accompanying the change of the print order, the ink is washed by the following procedure. First, the ink supply by the flexible tube 60 extending from the tubing pump 95 is stopped. Further, by moving the flexible tube 60 downward and immersing the opening 60b in the ink remaining in the ink storage portion A, the tubing pump 95 is reversely operated so that the residual ink is transferred to the ink pot 58. to recover. Next, after raising the flexible tube 60, the rocking mechanism 53 is reversely actuated to displace the ink transfer roll 50 counterclockwise about the projecting shafts 116, 116, as shown in FIG. As shown, the ink transfer roll 50 is separated from the plate cylinder 44 (printing plate 42). Therefore, the fluid pressure cylinder 114 is urged to bring the scraper 80 into contact with the ink transfer roll 50 at an appropriate pressure. When the distance between the ink transfer roll 50 and the adjusting plate 110 is expanded, most of the ink remaining in the ink storage portion A without being collected by the flexible tube 60 adheres to the surface of the transfer roll 50, and the ink is The ink is scraped up and removed by the scraper 80 and collected in the ink pan 78.

Next, the scraper 80 is separated from the ink transfer roll 50, the adjusting plate 110 is brought into contact with the roll 50, and the ink is stored through the cleaning liquid supply pipe provided in the supply / recovery device 54. The cleaning liquid is supplied to the part A. Since the reservoir A is closed at both ends in the longitudinal direction by the dam members 74, 74, the cleaning liquid is stored in a state where it is spread over the entire axial direction. After the cleaning operation is performed for a predetermined time in this state, the weir members 74, 74 are raised to open the ink storage portion A, and the cleaning waste liquid that has washed away the ink remaining on the ink transfer roll 50 is stored in the storage portion. It is discharged to the gutter member 76 from both ends of A. Further, this cleaning waste liquid is supplied to the ink pan 78 from the gutter member 76, and is collected from there in a waste liquid tank (not shown).

By replacing the ink pot 58 of the supply / collection device 54 and removing the flexible tube 60 from the tubing pump 95 for cleaning, or by replacing it with a tube 60 prepared in advance, Color change is completed. As an ink cleaning method, after collecting the cleaning waste liquid, the scraper 80 may be used to remove the water adhering to the ink transfer roll 50, or the scraper 80 may be used to scrape the ink from the ink transfer roll 50. Cleaning may be performed by supplying the cleaning liquid to the ink storage portion A while the scraper 80 is kept in contact with the roll 50. Further, it goes without saying that the other methods described with reference to the embodiment shown in FIG. 1 can be appropriately adopted.

In the embodiment, the cleaning waste liquid discharged to the gutter member is collected in the waste liquid tank via the ink pan, but the present invention is not limited to this, and the cleaning waste liquid discharged to the gutter member is not limited to this. Alternatively, it may be configured so that it is directly guided to the waste liquid tank. Further, the supply / recovery device for selectively supplying and recovering the ink is not limited to one as in the embodiment, and a plurality of supply / recovery devices may be arranged in series. In this case, since each supply / recovery device needs to move in a short area, it is possible to quickly supply the ink to the necessary place in the ink storage section. Further, in the embodiment, the case where the ink is supplied to the ink storage portion and the ink is collected by using the tubing pump has been described, but the present invention is not limited to this, and a pump capable of forward and reverse biasing is used. If so, other types can be adopted.

[0042]

[Effect of device]

 As described above, according to the ink supply / recovery mechanism of the corrugated board sheet printing machine according to the present invention, the flexible tube inserted in the tubing pump is configured to be movable along the ink reservoir and to be vertically movable. As a result, it becomes possible to focus on supplying ink to the required areas of the printing plate. Therefore, the ink consumption is small and the ink need not be constantly circulated, which has the advantage of simplifying the mechanism. In addition, when changing the printing order, etc., the flexible tube inserted in the tubing pump is lowered toward the ink storage section, so that the ink remaining in the storage section is suitable. Since it can be collected in a short time, it is possible to suppress the amount of ink that is wastefully discarded, and to save ink. Moreover, since it is not necessary to constantly circulate the ink, the amount of cleaning waste liquid is extremely small, which greatly saves ink and is extremely advantageous from the viewpoint of pollution prevention. In addition, since an ink kneading mechanism and a circulation mechanism are not required, space saving and low cost can be realized.

Further, the tubing pump is used to supply and recover the ink, so that it is not necessary to wash the pump itself when changing colors, and the amount of ink discarded by the washing can be reduced. It can be suppressed to a low level. Further, since the flexible tube can be easily removed from the pump, the tube can be easily washed in a short time, and the time required for color change can be extremely shortened. Moreover, if a flexible tube that has been washed in advance is prepared for the color change, this can further shorten the time.

[Brief description of drawings]

FIG. 1 is a schematic side view of an ink supply / recovery mechanism of a corrugated board sheet printing machine according to an embodiment of the present invention, showing a printing state on a corrugated board sheet.

2 is a perspective view of essential parts showing a schematic configuration of an ink transfer mechanism and a supply / collection device in the printing machine shown in FIG.

FIG. 3 is a schematic side view showing a state of ink collection after printing is completed in the printing machine shown in FIG.

FIG. 4 is a schematic side view showing a state of ink cleaning after printing is completed in the printing machine shown in FIG.

FIG. 5 is a schematic side view of a printing machine according to another embodiment of the present invention, showing a printing state on a corrugated board sheet.

6 is a schematic side view showing a state of ink cleaning after printing is completed in the printing machine shown in FIG.

FIG. 7 is a side view schematically showing various roll arrangements of a conventional prism printing machine.

FIG. 8 is a side view schematically showing various roll arrangements of a flexographic printing machine according to the related art.

9 is a perspective view showing a schematic mechanism of an ink circulation supply system in the flexographic printing machine shown in FIG.

[Explanation of symbols]

 42 printing plate 43 corrugated sheet sheet 44 plate cylinder 46 impression cylinder 50 ink transfer roll 52 squeezing roll 54 supply / collection device 58 ink supply unit (ink pot) 60 flexible tube 60a one opening 60b the other opening 74 weir member 95 Tubing Pump 96 Reversible Motor 99 Elevating Drive Mechanism 110 Aperture Adjustment Plate A Ink Storage Section

Claims (4)

[Scope of utility model registration request] 1. A printing cylinder (44) having a printing plate (42) mounted thereon, and an impression cylinder (46) arranged opposite to the printing cylinder (44).
Corrugated cardboard sheet (43) between the plate cylinder (44) and the impression cylinder (46), which transfer ink to each other and rotate in mutually opposite directions.
In a corrugated board sheet printing machine configured to perform the required printing on the sheet (43) by passing through the plate cylinder (44) so that the plate cylinder (44) can be moved toward and away from the plate cylinder (44). The ink transfer roll (50) that rotates in contact with the printing plate (42) of (44) and the squeeze roll (50) that constantly contacts and rotates during operation to adjust the ink amount 52) and above the ink transfer roll (50) and the squeezing roll (52), which can be moved in parallel in the longitudinal direction of the roll (50, 52) and which can be moved forward and backward by a reversible motor (96). The tubing pump (95) to be energized, and the tubing pump (95) is detachably inserted so that one opening (60a) faces the ink supply section (58) and the other opening (60b). A tube (60) with the ink storage section (A) defined between the rolls (50, 52) facing the tube (60), Pump (95) and a moving mechanism (99) for moving the opening (60b) of the tube (60) facing the ink reservoir (A), and the tube (60). The opening (60b) of () is always located at the ink ejection position above the ink storage (A), and by driving the reversible motor (96) in one direction, the inside of the ink supply (58) is By supplying the ink to the ink storage portion (A) and driving the elevating drive mechanism (99) to lower the tube (60), the opening portion (60b) is opened to the ink storage portion (A). The residual ink is immersed in the ink and the reversible motor (96) is rotated in the reverse direction so that the residual ink is supplied to the ink supply section (58).
An ink supply / collection mechanism for a corrugated board sheet printing machine, which is characterized in that 2. A printing cylinder (44) having a printing plate (42) mounted thereon, and an impression cylinder (46) arranged so as to face the printing cylinder (44).
Corrugated cardboard sheet (43) between the plate cylinder (44) and the impression cylinder (46), which transfer ink to each other and rotate in mutually opposite directions.
In a corrugated board sheet printing machine configured to perform the required printing on the sheet (43) by passing through the plate cylinder (44) so that the plate cylinder (44) can be moved toward and away from the plate cylinder (44). The ink transfer roll (50) that rotates in contact with the printing plate (42) of (44) and the squeeze roll (50) that constantly contacts and rotates during operation to adjust the ink amount 52) and above the ink transfer roll (50) and the squeezing roll (52), which can be moved in parallel in the longitudinal direction of the roll (50, 52) and which can be moved forward and backward by a reversible motor (96). The tubing pump (95) to be energized, and the tubing pump (95) is detachably inserted so that one opening (60a) faces the ink supply section (58) and the other opening (60b). A tube (60) with the ink storage section (A) defined between the rolls (50, 52) facing the tube (60), Pump (95), which is movable together with the pump (95), and which raises and lowers the opening (60b) of the tube (60) facing the ink reservoir (A), and the ink transfer roll (50). ) And a weir member (74, 74) arranged at both ends in the axial direction of the squeezing roll (52), the opening (60b) of the tube (60) is always above the ink reservoir (A). At the ink discharge position in, the ink in the ink supply section (58) is supplied to the ink storage section (A) by driving the reversible motor (96) in one direction, and the lifting drive mechanism ( By driving 99) to lower the tube (60), the opening (60b) is immersed in the residual ink in the ink reservoir (A), and the reversible motor (96) is rotated in the reverse direction. Ink supply section (58)
An ink supply / collection mechanism for a corrugated board sheet printing machine, which is characterized in that 3. A printing cylinder (44) having a printing plate (42) mounted thereon, and an impression cylinder (46) arranged so as to face the printing cylinder (44).
Corrugated cardboard sheet (43) between the plate cylinder (44) and the impression cylinder (46), which transfer ink to each other and rotate in mutually opposite directions.
In a corrugated board sheet printing machine configured to perform the required printing on the sheet (43) by passing through the plate cylinder (44) so that the plate cylinder (44) can be moved toward and away from the plate cylinder (44). The ink transfer roll (50) that rotates in contact with the printing plate (42) of (44), and the iris adjusting plate (50) that adjusts the ink amount by adjusting the tip of the ink transfer roll (50) during operation. 110) and the ink transfer roll (50) and the diaphragm adjusting plate (110), and the transfer roll (50) and the diaphragm adjusting plate (1).
10) and the reversible motor (9
6) A tubing pump (95) that is biased in the forward and reverse directions, and a tubing pump (95) that is detachably inserted so that one opening (60a) faces the ink supply section (58) and the other. The ink reservoir (A) defined by the opening (60b) between the ink transfer roll (50) and the diaphragm adjusting plate (110).
And a tube (60) facing the tube (60) and the tubing pump (95) are integrally movable so as to move up and down an opening (60b) facing the ink reservoir (A) of the tube (60). The mechanism (99), the opening (60b) of the tube (60) is always at the ink discharge position above the ink reservoir (A), and drives the reversible motor (96) in one direction. To supply the ink in the ink supply section (58) to the ink storage section (A), and to drive the elevating drive mechanism (99) to lower the tube (60) to open the opening. The part (60b) is dipped in the residual ink in the ink storage part (A), and the reversible motor (96) is rotated in the reverse direction so that the residual ink is supplied to the ink supply part (58).
An ink supply / collection mechanism for a corrugated board sheet printing machine, which is characterized in that 4. A printing cylinder (44) having a printing plate (42) mounted thereon, and an impression cylinder (46) arranged so as to face the printing cylinder (44).
Corrugated cardboard sheet (43) between the plate cylinder (44) and the impression cylinder (46), which transfer ink to each other and rotate in mutually opposite directions.
In a corrugated board sheet printing machine configured to perform the required printing on the sheet (43) by passing through the plate cylinder (44) so that the plate cylinder (44) can be moved toward and away from the plate cylinder (44). The ink transfer roll (50) that rotates in contact with the printing plate (42) of (44), and the iris adjusting plate (50) that adjusts the ink amount by adjusting the tip of the ink transfer roll (50) during operation. 110) and the ink transfer roll (50) and the diaphragm adjusting plate (110), and the transfer roll (50) and the diaphragm adjusting plate (1).
10) and the reversible motor (9
6) A tubing pump (95) that is biased forward and backward by the tubing and a tubing pump (95) that is detachably inserted so that one opening (60a) faces the ink supply section (58) and the other. The ink reservoir (A) defined by the opening (60b) between the ink transfer roll (50) and the diaphragm adjusting plate (110).
And a tube (60) facing the tube (60) and the tubing pump (95) are provided so as to be movable integrally with the tube (60) to lift and lower an opening (60b) facing the ink reservoir (A) of the tube (60). A mechanism (99) and an ink transfer roll (50) and a weir member (74, 74) arranged at both axial ends of the diaphragm adjusting plate (110), and the opening (60b) of the tube (60). ) Is always at the ink ejection position above the ink storage portion (A), and the reversible motor (96) is driven in one direction to remove the ink in the ink supply portion (58). (A), and by driving the elevating drive mechanism (99) to lower the tube (60), the opening (60b) is immersed in the residual ink in the ink reservoir (A). At the same time, the reversible motor (96) is rotated in the reverse direction to remove residual ink from the ink supply section (58).
An ink supply / collection mechanism for a corrugated board sheet printing machine, which is characterized in that