JP3028543U - Ink supply and recovery device for printing machine - Google Patents

Abstract

(57) [Summary] (Correction) [Problem] To shorten the time for replacing printing ink. SOLUTION: A support base 91 is provided above a main roll 1 and an auxiliary roll 11 so as to be movable in parallel with the axial direction of the roll by a slide drive device 95, and ascends and descends on the support base 91 in communication with a lifting device 7. Consists of a nozzle 64 that is arranged as possible, an ink supply and recovery pipe line 6 that connects the nozzle 64 to the ink tank and is detachably connected to the nozzle 64, and an air jet pipe 600 that is detachable from the nozzle 64. When changing the ink, the pipe 6 is removed from the nozzle 64 and the air jet pipe 600 is connected to the nozzle 64 to forcibly blow off the ink adhering to the inner wall of the nozzle from the nozzle by a high-speed air flow.

Description

[Detailed description of the device]

[0001]

[Field of Invention]

 The present invention mainly relates to an ink supply and recovery device in a corrugated board printing machine.

[0002]

[Problems to be solved by conventional techniques and devices]

 As a corrugated board printing machine, a type of printing machine between a flexo printing machine that uses quick-drying ink (flexo ink) and a Prislo printing machine that uses slow-drying ink has recently been implemented. As shown in FIG. 11, the printing machine is arranged so that it can come into contact with and separate from the plate cylinder (12), and the main roll (1) having fine irregularities formed on the surface thereof is opposed to the main roll (1). It is composed of an auxiliary roll (11) placed in contact with each other and an ink supply and recovery device (100). The ink has a slightly higher viscosity than the flexo ink, it is hard to dry when it is attached to the roll, and it quickly dries when it is attached to the corrugated cardboard sheet S (for example, Rizan Co., Ltd. Use cup # 4 for 10 to 13 seconds to dry in about 10 seconds.

The ink supplied to the ink pool between the rolls is collected in a minute concave portion on the surface of the main roll (1) and transferred to the plate cylinder (12). Also, the excess ink is scraped off by the auxiliary roll (11), and the ink adheres to the surface of the main roll (1) that has passed the contact point with the auxiliary roll (11) substantially uniformly over the entire length. . Therefore, the ink is evenly attached to the convex portions of the plate cylinder to which the ink is transferred from the main roll (1), and problems such as ink spots, color deviation, and ghost during printing do not occur. In addition, it is possible to achieve beautiful printing with a glossy printing surface by using an ink that has a slightly higher viscosity than the conventional printing with flexo ink. Further, unlike the case of flexo ink, it is not necessary to circulate the ink in the circulation pipe line in order to prevent the ink from solidifying, so that the device for supplying and collecting the ink can be simplified. The tube pump (101) shown in FIGS. 11, 12 and 13 can be used to supply and collect ink in the same device (100).

The ink supply and recovery device (100) is provided with a mounting base (9) above the rolls (1) and (11) slidably parallel to the axial direction of the roll, and the mounting base (9). Is connected to the slide drive device (95). On the mounting base (9), the tube pump (101), the nozzle support base (72) which is connected to the air cylinder (71) and moves up and down, and the tip is placed on the nozzle support base (72) and the tip end is the roll (1). A flexible tube that connects the ink tank (3) and the nozzle (64) via the nozzle (64) bent downward toward the space (11), the ink tank (3), and the tube pump (101). 103) has been deployed. As is well known, the tube pump (101) intermittently pushes out a tube by a rotor (101b) and feeds ink, and by feeding the motor (102) between forward and reverse rotation, the feed is performed. The direction can be switched to the opposite. Ink is supplied between the rolls by rotating the rotor (101b) of the tube pump (101) in the forward direction while moving the mount (9) in parallel with the axial direction of the rolls (1) and (11).

To collect the ink, the nozzle support base (72) is lowered by the air cylinder (71) to bring the lower end of the nozzle (64) close to the bottom of the ink pool between the rolls, and in this state the mounting base (9) While rotating the roller parallel to the axial direction of the roll, the rotor (101b) of the tube pump (101) is reversed to collect the ink in the ink tank (3). When changing the ink, remove the flexible tube (103) from the tube pump (101), replace the ink tank (3), the flexible tube (103) and the nozzle (64) together as a set, and roll. (1) Wash (11). As shown in FIG. 11, the cleaning device (10) for the rolls (1) and (2) has a rubber roll (13) and a steel roll (14) in contact with each other above the main roll (1), and the steel roll (14) The scraping plate (15) is brought into contact with the steel roll (14), and a horizontally long pipe-shaped shower nozzle (17) is arranged. The main roll (1) is raised and applied to the rubber roll (13), and water is dripped from the shower nozzle (17). The ink adhering to the main roll (1) is transferred to the steel roll (14) via the rubber roll (13), scraped off by the scraping plate (15) and collected in the tray (16). Instead of the cleaning device (10), a method of cleaning the auxiliary roll (11) by contacting it with a scraping plate (18) is also practiced.

[0006]

[Problems to be solved by the present invention]

 When changing the ink, the ink tank (3), the flexible tube (103) and the nozzle (64) must be replaced together as one set, and the nozzle (64) removed from the nozzle support base (72) must be replaced. Trouble that the roll (1) (11) and the nozzle (64) are accidentally dropped between the rolls (1) and (11) and caught in the rotating rolls (1) and (11), or the worker is In order to avoid the risk of getting caught in the rolls (1) (11), the rotation of the rolls (1) (11) must be stopped during this replacement work. Therefore, the rolls (1) and (11) cannot be washed while the ink tank (3), the flexible tube (103) and the nozzle (64) are replaced, and it takes time to change the setup. In the tube pump type ink supply and recovery device, the flexible tube is set in the tube pump (101) by removing the upper lid (101a) of the tube pump (101) and then removing the flexible tube (103). The rotor (101b) is inserted in a U-shaped bent state so as to dodge, but the tube pump (101) is attached at a height position of about 1.7 m due to the structure of the printing machine. Work is done while looking up at the pump (101), and workability is poor. Further, since the flexible tube (103) is pushed out by the rotor (101b), the flexible tube (103) is made of a soft material. As shown in FIG. 13, when the nozzle support base (72) is lowered during ink recovery, the flexible tube (103) is interposed between the tube pump (101) and the base end (64b) of the nozzle (64). ) Is bent in a V shape (103a), the passage of ink is obstructed, and the suction ability is significantly reduced. Therefore, in order to collect the ink, the nozzle (64) must be reciprocated many times in the axial direction of the roller, which takes time to collect. If the bend (103a) is in a completely bent state, the suction ability is almost lost. The V-shaped bending phenomenon of the flexible tube (103) often occurs when the flexible tube (103) is set on the rotor (101b). Must be set carefully. When the tube is bent in a V shape between the ink tank (3) and the tube pump (101), the ink supply ability is extremely reduced. Due to the slow completion of ink collection or supply, an operator noticed the bending of the tube and reached for an accident by reaching out from above the device without stopping the device to correct the bending of the tube. There is also. Further, as a characteristic of the tube pump, if air is mixed in the flexible tube (103), the feeding ability is lowered. Even if the lower end of the nozzle is lowered to the bottom of the ink pool between the rollers, when the amount of ink decreases, air is always mixed in from the tip of the nozzle and the capacity of the tube pump (101) is unavoidably deteriorated. Further, when the tube pump (101) is used, it is unavoidable that the tube is lengthened by at least the amount of bending the tube to pass through the rotor (101b). Therefore, the amount of ink adhering to the inside of the tube and being wasted increases, and cleaning the tube is troublesome. Furthermore, if the tube becomes long, the rise time from the actuation of the tube pump (101) until the ink is actually supplied between the rolls or the start of ink suction and collection will be longer. It is costly and inefficient.

[0007]

[Means for solving the problem]

 The ink supply and recovery device according to claim 1 is formed between a main roll (1) capable of contacting and separating from the plate cylinder (12) and an auxiliary roll (11) in contact with the main roll (1). The nozzle (64) toward the ink pool, and while moving the nozzle (64) parallel to the axial direction of the roll, the ink flows out from the nozzle (64) to supply the ink to the ink pool. In the ink supply and recovery device for sucking and collecting the shell ink of the nozzle (64) while lowering the nozzle (64) to near the bottom of the ink reservoir and moving it in parallel with the axial direction of the roll, (1) A support base (91) provided above the (11) by a slide drive device (95) so as to be movable in parallel with the axial direction of the roll, and a support base (91) linked to the lifting device (7). A nozzle (64) which is arranged so as to be able to move up and down, and an nozzle which is detachably connected to the nozzle (64) by connecting the nozzle (64) and the ink tank. (G) Consists of a pipe line (6) for supply and recovery, and an air injection pipe (600) detachable from the nozzle (64).

In the ink supply and recovery device of the second aspect, a closed pressure container (2) is provided above the roll (1) (11) by a slide drive device (95) so as to be movable in parallel with the axial direction of the roll. An ink tank (3) is housed in the closed pressure container (2) so that it can be put in and taken out, and a nozzle (64) is provided on the closed pressure container (2) so that the nozzle (64) can be moved up and down. , A pressure device (4) and a pressure reducing device (5) are connected to the closed pressure vessel (2), and a pipe line (6) is provided through the closed pressure vessel (2) in an airtight manner, and the pipe line (6) One end of 6) penetrates into the ink tank (3) and extends to the bottom of the ink tank (3), and the other end is detachably connected to the nozzle (64) so that air can be attached to and detached from the nozzle (64). An injection pipe (600) is provided.

An ink supply and recovery device according to a third aspect is the ink supply and recovery device according to the second aspect, wherein the pressurizing device (4) and the pressure reducing device (5) use a common compressor (42), and The high-speed air flow from the compressor is passed through the ejector (406), and the air in the closed pressure vessel (2) is sucked by the suction action generated by the ejector (406).

In the ink supply and recovery device of the fourth aspect, the flexible tube (103) forming a part of the conduit (6) is intermittently pressed by the rotor (101b) to supply or recover the ink. The tube pump (101) is used. The ink supply and recovery device according to a fifth aspect is the ink supply and recovery device according to the first to fourth aspects, wherein the water supply pipe (601) is connected to the air jet pipe (600).

[0011]

[Action and effect]

 In the case of claim 1, when changing the ink, the ink (6) is removed from the nozzle (64), the air jet pipe (600) is connected to the nozzle (64), and the ink adhered to the inner wall of the nozzle. Can be forcibly blown out of the nozzle by a high-speed air flow, and the inner wall of the nozzle can be cleaned. It is not necessary to replace the nozzle (64) with the ink tank (3) as in the conventional case, and the ink can be replaced immediately with the nozzle (64) set on the support base (91). Therefore, even if the ink is exchanged while the rolls (1) and (11) are rotated, the nozzle (64) is removed, so that the nozzle (64) may be caught between the rolls (1) and (11) or work may be performed. It is possible to avoid an accident in which the person's hand is caught between the rolls (1) and (11). Therefore, the ink replacement and the cleaning work of the rolls (1) and (11) can be performed in parallel, and the series of operations associated with the ink replacement can be performed quickly.

[0012] Claim 2 has the same effect as the effect of Claim 1 in terms of ink replacement. According to the second aspect of the present invention, when ink is supplied, the pressure inside the ink tank (3) is increased by raising the pressure inside the closed pressure container (2) and the inside of the ink tank (3) by the pressure device (4). Flow out from the nozzle (64), and at the time of ink recovery, the depressurizing device (5) is used to make the inside of the closed pressure container (2) and the ink tank (3) a negative pressure so that the ink in the ink reservoir is nozzled (64). Can be collected by suction from the ink tank (3). In addition, since ink is supplied and collected by pressurizing or depressurizing the inside of the closed pressure container (2) and the inside of the ink tank (3) with a high-speed air flow, compared to the conventional tube pump (101). By increasing the rise time of ink supply or recovery and the amount of ink supply per unit time, the time of ink supply and recovery can be shortened.

Further, even if a flexible hose (62) is used for the conduit (6) between the ink tank (3) and the nozzle (64), the nozzle (64) moves up and down in the hose. It is possible to use a hard material that does not bend in a V shape as much as it does, and the tube bends in a V shape like when using a tube pump, which significantly reduces the pump's delivery capacity. There is no. Ink supply and recovery capacity can be freely adjusted by adjusting the pressure and suction force applied to the closed pressure vessel (2). Also, even if air enters from the tip of the nozzle (64), it sucks ink together with the air at once, and the suction power of ink does not drop significantly, like when using a tube pump. Air will not enter the tube and the suction capacity will decrease, so the recovery time will not be long. Since the tube pump is not used, the length of the conduit (6) that connects the ink tank (3) and the nozzle (64) can be shortened, and the amount of ink adhering in the conduit (6) and wasted can be reduced. Also, the cleaning of the pipe (6) can be done quickly.

The third aspect has the same action and effect as the first aspect in terms of ink replacement. According to claim 3, the pressurizing device (4) and the depressurizing device (5) use a common compressor (42), and at the time of ink supply, a high-speed air flow from the compressor (42) is sealed in a pressure vessel. When the ink is collected, it is supplied to (2) and the inside of the closed pressure container (2) and the inside of the ink tank (3) are made higher than the outside air pressure to allow the ink in the ink tank (3) to flow out from the nozzle (64). The high-speed air flow from the compressor is passed through the ejector (406) to suck the air in the closed pressure vessel (2) by the suction action generated by the ejector (406), and the inside of the closed pressure vessel (2) and the ink Ink can be sucked and collected from the nozzle (64) into the ink tank (3) by making the inside of the tank (3) a negative pressure. Since only one compressor (42) is required, the structure is simple and the cost can be reduced.

The ink supply and recovery device according to claim 4 has the same effect as the effect of the first aspect. The nozzle (64) of the ink supply and recovery device using the conventional tube pump (101) and the connection part of the flexible tube are made detachable, and the air injection pipe (600) is simply connected, Most can be used as is.

According to the ink supply and recovery device of the fifth aspect, the inside of the nozzle (64) can be cleaned while the high-speed air stream contains water, and the cleaning effect is further enhanced.

[0017]

[Embodiment of device]

 As shown in FIG. 1, a base plate (93) is disposed above the main roll (1) and the auxiliary roll (11) so as to be slidable in parallel with the axial direction of the roll. In the same manner as in the conventional case shown in FIG. 9, the main roll (1) is arranged so that it can come into contact with and separate from the plate cylinder (12), and fine irregularities are formed on the surface. The auxiliary roll (11) has a surface made of rubber, and is arranged so as to face the main roll (1) so that the auxiliary roll (11) can contact and separate and can be pressurized. The base plate (93) rotatably engages a plurality of guide rollers (94) with the guide frame (300), and is connected to an orbiting chain (96) arranged along the guide flume. The orbiting chain (96) is connected to a drive sprocket (not shown) and constitutes a slide drive device (95) for the base plate (93). The closed pressure vessel (2) containing the ink tank (3) is hung and supported by the base plate (93).

In FIG. 2, in order to make the explanation easy to understand, the closed pressure vessel (2) has a sufficient size with respect to the ink tank (3), but in reality, the ink tank (3) is It is desirable that the closed pressure vessel (2) be as small as possible within the range where it can be put in and taken out, because the time for setting the high pressure or the negative pressure in the closed pressure vessel (2) can be shortened. As shown in FIG. 3, the closed pressure container (2) has a two-part structure composed of a container body (21) with one side open and a lid (22) attached so as to close the opening. is there. A rectangular frame-shaped seal material (29) is attached to one or both of the contact surfaces of the container body (21) and the lid body (22) so as not to come off by adhesion or the like. The lid (22) is openably and closably attached to the container body (21) by a hinge (23), and the lid (22) is closed to the container body (21) in a hermetically closed state by a locking means (26). .

An example of the locking means (26) will be described with reference to FIG. The free end of the lid (22) and the container body (21) are L-shaped metal fittings (500) (500) at positions facing each other outside the closed pressure vessel (2) when the lid (22) is closed. Is projected. The surface of one plate portion (501) of each L-shaped metal fitting (500) (500) faces the surface of the one plate portion (501) of the other L-shaped metal fitting (500). The inclined guide surfaces (501a) (501a) are formed by obliquely cutting the outer ends of the opposite plate portions (501) (501).

A lever (502) is pivotally supported (502a) below the L-shaped metal fitting (500) so as to be rotatable in a vertical plane on either the container body (21) or the lid (22). The lever (502) is provided with a sandwiching member (503) for sandwiching plate portions (501) (501) of the L-shaped metal fittings (500) (500) of the container body (21) and the lid body (22) facing each other. It is fixed. The sandwiching member (503) is provided with a sandwiching groove (504) on the L-shaped metal fitting (500) side, and an opening edge of the sandwiching groove (504) is obliquely cut to form inclined guide surfaces (504a) (504a). Has been done. The sandwich groove (504) has a groove width determined so that the opposing plate portions (501) (501) of the L-shaped metal fittings (500) (500) are closely fitted. In the embodiment, the sandwiching member (503) is attached to the lever (502) pivotally supported at one end, but the sandwiching member (503) is attached to the plate portions (501) (501) so as to be disengaged from the outside. The structure of the moving means of the sandwiching member (503) does not matter as long as it can be moved.

When the lid body (22) is closed, the sealing material (29) is pressed between the container body (21) and the lid body (22). With the plate portions (501) (501) of the L-shaped brackets (500) (500) facing each other, push up the lever (502) to insert the plate portions (501) (501) into the sandwiching groove (504) of the sandwiching member (503). ) Intrude. By the inclined guide surfaces (501a) (501a) of the plate portions (501) (501) and the inclined guide surfaces (504a) (504a) of the sandwiching member (503), the sandwiching member (503) and the plate portion (501) ( No great force is required to engage 501). Due to the elastic restoring force of the sealing material (29), the airtightness of the container body (21) and the lid body (22) is reliably prevented. Of course, the lever (502) including the sandwiching member (503) may be attached to the lid body (22). A circular hole (20) is opened across the top plate of the container body (21) and the lid body (22), and the center of the hole (20) is the container body (21) and the lid body (22). The semicircular cutouts (20a) (20a) are opened in the container body (21) and the lid body (22) at the boundary of. The hole (20) is a conduit insertion hole for passing a conduit (6) connecting the ink tank (3) and the nozzle (64).

A transparent viewing window (27) that is airtightly covered with a transparent plate is provided on the side surface of the container body (21). The transparent viewing window (27) is for visually checking the remaining amount of ink in the ink tank (3) in the closed pressure container (2). On the ceiling surface of the container body (21), a conduit support (86) is provided corresponding to the position of the semicircular cutout (20a). The supporting base (86) has a short downward mounting leg (88) at the base end, and as shown in FIGS. 5A and 5B, has a U-shaped notch (87) opening to the distal end side. . The width of the U-shaped notch (87) is slightly larger than the diameter of the brass pipe (61) of the conduit (6) described below. The support (86) is provided with a soft locking tool (8) for softly locking the brass pipe (61) fitted in the U-shaped notch (87).

The soft locking device (8) penetrates the U-shaped notch (87) from the outer surface of the support base (86), and the tubular screw case (81) is screwed into the nut (85). Fix it, dispose the locking piece (82) at the inner end of the case so that it can be retracted, and screw the set screw (84) to the outer end of the case to set the set screw (84) and the locking piece (82). A compression spring (83) is provided between and. When the brass pipe (61) reaches the deep end of the U-shaped cutout (87), the tip of the locking piece (82) projects from the case and hits the side surface of the brass pipe (61). Hold the position of the pipe (61). When the brass pipe (61) is pulled toward the opening side of the U-shaped notch (87), the locking piece (82) withdraws into the case (81) against the spring (83), and the brass pipe (61) Can be escaped from the support (86). Even when the brass pipe (61) is fitted into the U-shaped notch (87), the locking piece (82) is likewise pulled in and there is no problem.

In the support base (86), the opening of the U-shaped cutout (87) faces the lid (22) side, and the rear end of the U-shaped cutout (87) is located in the container body (21). The semicircular notch (20a) is attached to the container body (21) so as to be located slightly closer to the lid (22) than directly above the arc edge. The reason why the U-shaped notch (87) is slightly closer to the lid (22) side is that the brass pipe (61) is supported vertically in consideration of the thickness of the sealing material (66), which will be described later, of the brass pipe (61). To do so. A support base (91) is provided on the side surface of the container body (21) of the closed pressure container (2), a nozzle support base (72) is provided on the support base so as to be able to move up and down, and the nozzle support base (72) is provided. The lifting device (7) is connected. The lifting device (7) is an air cylinder (71).

The nozzle support base (72) has a wall surface bent in an L shape in a vertical plane, has a horizontally long wall surface and a vertically long wall surface extending downward from one end of the wall surface. (73) (74) are projected. The upper supporting piece (73) is provided with a horizontally elongated groove (75), and the lower supporting piece (74) is provided with a notched groove (76). Each support piece (73) (74) has a soft locking device (not shown) that softly locks the nozzle (64) when the nozzle (64) is placed across each support piece (73). ) Is provided. The structure of the soft locking device is the same as that of the soft locking device (8) described in the closed pressure vessel (2).

The nozzle (64) is formed by bending a brass pipe into an L shape in a vertical plane. The horizontal portion (64a) of the nozzle (64) is fitted into the groove (75) of the upper support piece (73), and the vertical portion (64b) of the nozzle (64) is inserted into the groove (76) of the lower support piece (74). It is detachably supported by a soft locking device. In the embodiment, as shown in FIG. 9, a nozzle tip portion (65) formed by cutting a synthetic resin pipe into a short length is attached to the tip of the nozzle (64). The nozzle tip portion (65) is provided with an inverted V-shaped notch (65a) at the tip, and a through hole (65b) is opened slightly above the notch (65a). The inverted V-shaped notch (65a) has a nozzle tip (65) of the roll (1) (11) when the nozzle (64) descends to the bottom of the ink pool between the rolls (1) and (11). This is because it is easy to deform along the curved surface. The through hole (65b) plays a role of preventing the nozzle tip portion (65) from being flattened and the ink suction being extremely lowered when the ink is collected, because the suction force is too strong. The nozzle tip portion (65) may be oriented with the notch (65a) toward the roll (1) (11) side as shown in FIG. 9B, or may be reversed by 90 ° as shown in FIG. 9A.

The nozzle (64) and the ink tank (3) are connected by a pipe line (6). As shown in FIG. 2, in the embodiment, the ink tank (3) is assumed to be a tank that the ink maker holds and sells the ink, and has an opening (32) at one end of the upper surface and a handle (33) at the other end. It is provided. The pipe line (6) of the embodiment is formed by connecting a flexible hose (62) to a brass pipe (61) which is inserted into the ink tank (3), and the pipe (61) has a vertically long straight portion ( The upper end of 61a is bent toward the nozzle (64), and the lower end is bent at a substantially right angle in a direction away from the opening (32) of the ink tank (3).

Insert the brass pipe (61) into the opening (32) of the ink tank (3) to the bottom of the ink tank (3) with a margin, and connect the flexible hose (62) and nozzle (64) to the fluid. Detachable connection via desorption joint (67). The fluid removable joint (67) consists of a socket (67a) attached to the tip of the flexible hose (62) and a plug (67b) attached to the base end of the nozzle (64), as shown in FIG. The socket (67a) has a built-in automatic opening / closing valve (not shown) .When the plug (67b) is fitted into the socket (67a), the valve automatically opens and the plug (67b) is opened. The valve closes automatically when is removed. The flexible hose (62) is selected to have a hardness that does not bend in a V shape as long as the nozzle (64) moves up and down by the air cylinder (71). Further, a sealing material (66) for establishing airtightness with the pipe passage insertion hole (20) of the closed pressure vessel (2) is attached to the vertically long straight portion (61a) of the brass pipe (61). There is. The sealing material (66) of the embodiment is obtained by cutting an elastic pipe made of synthetic resin into short pieces and fitting them into a brass pipe (61).

A connection port (28) is provided on the ceiling of the container body (21), and the pressurization device (4) and the decompression device (5) are connected to the connection port (28) as shown in FIG. As shown in FIG. 6, the pressurizing device (4) and the depressurizing device (5) of the embodiment can pressurize and depressurize the inside of the closed pressure vessel (2) by one compressor (42). The first and second flow paths (400a) (400b) are branched from the compressor (42). The first flow path (400a) is branched and connected to the closed pressure vessel (2), and merges with the second flow path (400b) via an ejector (vacuum generator) (406). The ejector (406) is a well-known device that sucks the first flow path (400a) side to generate a vacuum by sending compressed air into the ejector from the second flow path (400b). A third flow path (400c) extends from the ejector (406) on the extension of the second flow path (400b) and is open to the atmosphere via a silencer (407).

In the first flow path (400a), between the branch part (400d) to the closed pressure vessel (2) and the compressor (42), a switching valve (401) and a pressure reducing valve ( 402), the switching valve (403) and the switching valve (408) on the ejector (406) side. The upstream-side and downstream-side switching valves (401) (408) are solenoid valves that can be switched between open and closed, and the intermediate switching valve (403) is a solenoid valve that can be switched between open, closed, and open to the atmosphere. The second flow path (400b) is provided with an open / close switching valve (404) on the upstream side and a pressure reducing valve (405) on the downstream side.

At the time of pressurizing the closed pressure vessel (2), the switching valve (408) on the downstream side of the first flow path (400a) and the switching valve (404) of the second flow path (400b) are closed, and The switching valves (401) (403) on the upstream side and the middle of the flow path (400a) are opened, and the pressurizing device (4) side is operated. The high-speed air flow from the compressor (42) flows through the pressure reducing valve (402) to the closed pressure vessel (2) as shown by the arrow A, and pressurizes the inside of the closed pressure vessel (2). At the time of decompression, the switching valve (408) on the downstream side of the first flow path (400a) and the switching valve (404) on the second flow path (400b) are opened, and the switching valve (404) on the upstream side and the middle of the first flow path (400a) is opened. The switching valves (401) (403) are closed and the pressure reducing device (5) side is activated. The high-speed air from the compressor (42) flows from the second flow path (400b) to the third flow path (400c) as shown by arrow B, and from the closed pressure vessel (2) side as shown by arrow C. Air flows into the three flow paths (400c) and the inside of the closed pressure vessel (2) becomes negative pressure. When the high-speed airflow is released to the atmosphere from the third passage (400c), it passes through the silencer (407), so that the air emission sound is low and no noise is emitted.

For ink supply, a liquid level detector is installed in the ink pool between the main roll (1) and the auxiliary roll (11), and when the amount of ink falls below the lower limit set value, the ink is automatically fed. The ink is supplied by sending a supply signal and switching the pressurizing and depressurizing devices (4) and (5) to the pressurizing side. When the ink reaches the upper limit set value, the compressor (42) is stopped and the ink supply is stopped. Ink recovery is automatically performed by a signal from a control device (not shown) when a manual button (not shown) is operated or a predetermined amount of printing is completed. A flexible air injection pipe (600) is provided so as to be movable together with the closed pressure vessel (2), and a socket () at the end of the flexible hose (62) is provided at the end of the air injection pipe (600). Provide a socket (601) similar to 67 a). The air injection pipe (600) may be branched and connected from the pipe of the air cylinder (71) of the lifting device (7) through a necessary valve.

Then, the lid body (22) of the closed pressure container (2) is opened, and the ink tank (3) is inserted into the container body (21). The ink tank (3) is preliminarily attached with the conduit (6). That is, the brass pipe (61) is inserted into the opening (32) of the ink tank (3). When inserting the ink tank (3) into the container body (21), push the upper part of the brass pipe (61) into the U-shaped notch (87) of the support base (86) and insert the sealing material (66) into the container. Fit in the semicircular cutout (20a) of the body (21). As described above, the brass pipe 61 is automatically supported in the vertical position by the support 86. The lid (22) is closed and stopped by the locking means (26). The socket (67a) of the flexible hose (62) is fitted into the plug (67b) of the nozzle (64) set on the nozzle support base (72) on the closed pressure vessel (2) in advance.

When supplying ink, as described above, the pressurizing / depressurizing devices (4) and (5) are switched to the pressurizing side for operation. The high-speed airflow from the compressor (42) fills the inside of the closed pressure container (2) with high pressure in a short time, and causes the ink in the ink tank (3) to flow out from the nozzle (64). At the same time, the closed pressure vessel (2) and hence the nozzle (64) are moved parallel to the axial direction of the rolls to supply the ink along the ink pool between the rolls (1) and (11). By adjusting the pressure reducing valve (402), the outflow amount of ink from the nozzle (64) can be freely set.

When collecting ink, the nozzle (64) is lowered until it comes close to the bottom of the ink pool between the rolls, and the pressure and pressure reducing devices (4) and (5) are switched to the suction side for operation. The closed pressure vessel (2) and hence the nozzle (64) are moved parallel to the axial direction of the roll. Due to the suction action of the high-speed air flow passing through the ejector (406), the closed pressure container (2) also becomes negative pressure in a short time, and the ink in the ink reservoir is sucked and collected from the nozzle (64) into the ink tank (3). To do.

When changing the ink, the plug (67b) of the nozzle (64) and the socket (67a) of the flexible hose (62) are disengaged. The socket (67a) has a built-in automatic opening / closing valve, and when the plug (67b) is removed, the opening automatically closes, so that the ink in the flexible hose (62) drips and pollutes the surroundings. There is no. Insert the socket (601) at the tip of the air injection pipe (600) into the plug (67b) of the nozzle (64). The high-speed air flow from the air jet pipe (600) blows off the ink adhering to the inner wall of the nozzle and forcibly blows it off from the nozzle, so that the inner wall of the nozzle can be cleaned. Open the lid (22) of the closed pressure container (2), take out the ink tank (3) together with the conduit (6), and store the new ink tank in the closed pressure container (2) according to the procedure described above. Also, the conduit may be set together with the ink tank.

Unlike the conventional case, it is not necessary to replace the nozzle (64) with the ink tank (3), and the ink can be replaced immediately with the nozzle (64) set on the support base (91). . Therefore, even if the ink is exchanged while the rolls (1) and (11) are rotated, the nozzle (64) is removed, so that the nozzle (64) may be caught between the rolls (1) and (11) or work may be performed. It is possible to avoid an accident in which the person's hand is caught between the rolls (1) and (11). Therefore, the ink replacement and the cleaning work of the rolls (1) and (11) can be performed in parallel, and the series of operations associated with the ink replacement can be performed quickly.

As in the embodiment, when the lower end of the brass pipe (61) inserted in the ink tank (3) is bent away from the opening (32) of the ink tank (3), it is possible to recover the ink. Even if air is entrained in the ink tank and the inside of the ink tank (3) foams, the ink does not blow out because the foaming position is far from the opening (32). In addition, even if air enters from the tip of the nozzle (64), the suction power of ink does not decrease significantly, and air will enter the tube as in the case of using a tube pump, and the suction capacity will decrease. , The recovery time does not take long. When supplying the ink, when the ink reaches the set upper limit position, it is necessary to simply close the space between the compressor (42) and the closed pressure vessel (2) of the conduit (41) on the pressure device (4) side. The high pressure in the conduit (41) remains, and some ink outflow from the nozzle (64) is unavoidable, but due to the function of the switching valve (45) of the conduit (41), the conduit (41) By communicating the air with the outside, the pressure inside the closed pressure vessel (2) instantly becomes atmospheric pressure, and the outflow of ink from the nozzle (64) is stopped.

FIGS. 7 and 8 are modifications of the locking means (26) shown in FIGS. 3 and 4. The L-shaped metal fitting (500) on the container body (21) side was omitted, and the plate portion (501) of the L-shaped metal fitting (500) on the lid body (22) side was pivotally supported (502a) on the container body (21). The lid (22) is locked by scratching the lock member (508) on the lever (502). The lock member (508) and the plate portion (501) are formed with inclined guide surfaces (504a) (501a) for facilitating the engagement. Since only one L-shaped metal fitting (500) is required, the structure is simple. Even if the container body (21) is provided with the plate portion (501) of the L-shaped metal fitting (500) and the lid body (22) is provided with the lever (502) and the lock member (508), the same effect as described above can be obtained. .

FIG. 10 shows another embodiment of the arrangement position of the air injection pipe (600). The air injection pipe (600) is provided at one end side of the rolls (1) and (11), and the water supply pipe (602) is provided at an end of the shower rod (17) having a long oblong shape for cleaning the rolls (1) and (11). ) Is connected. A compressor (not shown) is connected to the air injection pipe (600). Excess water in the shower nozzle (17) flows to the air injection pipe (600) side, and when compressed air is sent from the air injection pipe (600), the compressed air is injected together with the water. Therefore, when the air injection pipe (600) is connected to the nozzle (64) of the closed pressure vessel (2) when replacing the ink, the cleaning effect on the inner wall of the nozzle (64) can be enhanced. Further, at the end of the rolls (1) and (11), a nozzle for ejecting the ink between the rolls (1) and (11) to the center side of the rolls by air pressure has been conventionally installed when collecting ink. Therefore, by using the pipe of this nozzle, the pipe for the air injection pipe (600) can be simplified. The present invention is not limited to the configuration of the above embodiment, and various modifications can be made within the scope of the claims for utility model registration.

[Brief description of drawings]

FIG. 1 is a perspective view of an ink supply and recovery device in a corrugated board printing machine.

FIG. 2 is a partially sectional front view of the above.

FIG. 3 is a perspective view of a closed pressure container and an ink tank.

FIG. 4 is a cross-sectional view of essential parts with a closed pressure vessel closed.

5A is a plan view of a support, and FIG. 5B is a plan view of a state where a pipe is fitted on the support.

FIG. 6 is an explanatory diagram of a pressurizing device and a depressurizing device.

FIG. 7 is a perspective view of a hermetically sealed pressure vessel having locking means according to another embodiment.

FIG. 8 is a cross-sectional view of an essential part of the above closed pressure container in a closed state.

FIG. 9 is an explanatory diagram of a nozzle tip portion.

FIG. 10 is an explanatory view of another embodiment of the air injection pipe.

FIG. 11 is a front view of a conventional printing machine using an intermediate type ink for a flexographic printing machine and a Prislo printing machine.

FIG. 12 is a perspective view of an ink supply and recovery device using a conventional tube pump.

FIG. 13 is a perspective view of the tube of the above tube pump in a state in which the tube is bent into a V shape.

[Explanation of symbols]

 (1) Main roll (11) Auxiliary roll (2) Closed pressure container (3) Ink tank (4) Pressurizing device (5) Pressure reducing device (7) Lifting device (600) Air injection pipe

Claims (5)

[Scope of utility model registration request] 1. A nozzle () facing a pool of ink formed between a main roll (1) capable of contacting and separating from a plate cylinder (12) and an auxiliary roll (11) in contact with the main roll (1). 64), while the nozzle (64) is moved in parallel with the axial direction of the roll, the ink flows out from the nozzle (64) to supply the ink to the ink reservoir, and the nozzle (64) In the ink supply and recovery device for sucking and recovering the ink from the nozzle (64) while lowering it near the bottom of the roll and moving it in parallel to the axial direction of the roll, above the rolls (1) and (11). A support base (91) provided by a slide drive device (95) so as to be able to move in parallel with the axial direction of the roll, and a nozzle (combined with the elevating device (7) so as to be able to move up and down on the support base (91) ( 64), and an ink supply and recovery conduit (6) that connects the nozzle (64) and the ink tank and is detachably connected to the nozzle (64). , And an air injection pipe (600) which can be attached to and detached from the nozzle (64). When changing ink, the pipe (6) is removed from the nozzle (64) and the air injection pipe (6) is attached to the nozzle (64). An ink supply and recovery device for a printing machine that is capable of forcibly blowing off the ink adhering to the inner wall of the nozzle from the nozzle with a high speed air flow. 2. A nozzle () directed toward an ink pool formed between a main roll (1) capable of contacting and separating from a plate cylinder (12) and an auxiliary roll (11) in contact with the main roll (1). 64), while the nozzle (64) is moved in parallel with the axial direction of the roll, the ink flows out from the nozzle (64) to supply the ink to the ink reservoir, and the nozzle (64) In the ink supply and recovery device for sucking and recovering the ink from the nozzle (64) while lowering it near the bottom of the roll and moving it in parallel to the axial direction of the roll, above the rolls (1) and (11). A closed pressure container (2) that is provided so as to be able to move in parallel with the axial direction of the roll by a slide drive device (95) and accommodates an ink tank (3) in and out, and a container (2) that is connected to an elevating device (7). )
A nozzle (64) arranged so as to be able to move up and down, a pressurizing device (4) and a depressurizing device (5) connected to the closed pressure container (2),
An ink tank (3) that is exchangeably accommodated in the closed pressure container (2) and an ink tank (3) that penetrates the closed pressure container (2) in an airtight manner and one end enters the ink tank (3). Conduit that extends to the bottom of the nozzle and the other end is detachably connected to the nozzle (64)
(6) and an air injection pipe (600) that can be attached to and detached from the nozzle (64)
When the ink is supplied, the inside of the closed pressure vessel (2) and the inside of the ink tank (3) are raised to a pressure higher than the outside air pressure by the pressure device (4), and the ink in the ink tank (3) is discharged from the nozzle (64). ) And decompressor when collecting ink.
Due to (5), inside the closed pressure vessel (2) and ink tank (3)
The inside of the ink reservoir is suctioned and collected from the nozzle (64) into the ink tank (3) by making the inside a negative pressure, and when changing the ink, the pipe (6) is removed from the nozzle (64) and the nozzle (64) ) Is connected to the air jet pipe (600) to forcibly blow off the ink adhering to the inner wall of the nozzle from the nozzle by a high-speed air flow. 3. A nozzle () facing a pool of ink formed between a main roll (1) capable of contacting and separating from a plate cylinder (12) and an auxiliary roll (11) in contact with the main roll (1). 64), while the nozzle (64) is moved in parallel with the axial direction of the roll, the ink flows out from the nozzle (64) to supply the ink to the ink reservoir, and the nozzle (64) In the ink supply and recovery device for sucking and recovering the ink from the nozzle (64) while lowering it near the bottom of the roll and moving it in parallel to the axial direction of the roll, above the rolls (1) and (11). A closed pressure container (2) that is provided so as to be able to move in parallel with the axial direction of the roll by a slide drive device (95) and accommodates an ink tank (3) in and out, and a container (2) that is connected to an elevating device (7). )
A nozzle (64) arranged so as to be able to move up and down, a pressurizing device (4) and a depressurizing device (5) connected to the closed pressure container (2),
An ink tank (3) that is exchangeably accommodated in the closed pressure container (2) and an ink tank (3) that penetrates the closed pressure container (2) in an airtight manner and one end enters the ink tank (3). Conduit that extends to the bottom of the nozzle and the other end is detachably connected to the nozzle (64)
(6) and an air injection pipe (600) that can be attached to and detached from the nozzle (64)
And a pressure device (4) and a pressure reducing device (5)
Uses a common compressor (42), and when supplying ink, closes the high-speed air flow from the compressor (42) to a closed pressure container.
(2), the inside of the closed pressure container (2) and the inside of the ink tank (3) are made higher than the outside air pressure to cause the ink in the ink tank (3) to flow out from the nozzle (64). ,
The high-speed air flow from the compressor is passed through the ejector (406), and the air in the closed pressure vessel (2) is sucked by the suction action generated by the ejector (406) to obtain the closed pressure vessel (2).
The inside of the ink tank (3) and the inside of the ink tank (3) are set to a negative pressure to suck and collect the ink from the nozzle (64) into the ink tank (3). When changing the ink, remove the conduit (6) from the nozzle (64). The nozzle
An ink supply and recovery device for a printing machine capable of connecting an air jet pipe (600) to (64) and forcibly ejecting the ink adhering to the inner wall of the nozzle from the nozzle by a high-speed air flow. 4. A nozzle () directed toward an ink pool formed between a main roll (1) capable of contacting and separating from a plate cylinder (12) and an auxiliary roll (11) in contact with the main roll (1). 64), while the nozzle (64) is moved in parallel with the axial direction of the roll, the ink flows out from the nozzle (64) to supply the ink to the ink reservoir, and the nozzle (64) In the ink supply and recovery device for sucking and recovering the ink from the nozzle (64) while lowering it near the bottom of the roll and moving it in parallel to the axial direction of the roll, above the rolls (1) and (11). A support base (91) provided by a slide drive device (95) so as to be able to move in parallel with the axial direction of the roll, and a nozzle (combined with the elevating device (7) so as to be able to move up and down on the support base (91) ( 64), and an ink supply and recovery conduit (6) that connects the nozzle (64) and the ink tank and is detachably connected to the nozzle (64). , Pipeline
A tube pump (101) for supplying or collecting ink by intermittently pressing a part of (6) with a rotor (101b);
It is composed of a nozzle (64) and an air jet pipe (600) that can be attached and removed.
And connect the air injection pipe (600) to the nozzle (64),
An ink supply and recovery device for a printing machine that can forcibly blow off the ink adhering to the inner wall of the nozzle from the nozzle with a high-speed air flow. 5. A water supply pipe is connected to the air injection pipe (600), and the ink adhering to the inner wall of the nozzle can be forcibly blown out of the nozzle by a high-speed air flow containing water. The ink supply and recovery device according to any one of 4 above.