JP3472295B1 - Ink circulation supply device for ink roller of box making press - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To improve the efficiency of ink recovery and cleaning work in an ink circulation and supply device of an ink roller of a box making printing machine, and to minimize the downtime of the box making printing machine due to the ink collecting and washing work. suppress. SOLUTION: A rotatable or slidable drain pipe 26 is installed at both ends of an ink developing chamber 2E, and each drain pipe 26 has a plurality of outlets H1 having different opening areas.
Form H2. The formed discharge ports H1 and H2 are rotated or slid on the drain pipe 26,
The opening area required for maintaining the ink level in the ink developing chamber 2E constant, and the expelling and recovery of the ink from the ink developing chamber 2E by air blow or the cleaning of the residual ink in the ink developing chamber 2E by the pressure feed of the cleaning liquid. It varies between the required opening area.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box making machine (hereinafter referred to as "box making printing machine") having a printing unit having a printing function in a series of constituent devices and having a printing function for a material sheet.
Say. 2) relates to an ink circulation supply device for a printing unit of a box-making printing machine, which supplies printing ink to an ink roller of the printing unit.

[0002]

2. Description of the Related Art A box making machine for manufacturing a cardboard box or the like is a compound machine composed of a plurality of machines which share a large number of steps up to forming a material sheet into a box. Also,
Multi-functional box-making printers that incorporate a printing unit for printing characters and designs that appear on cardboard boxes are also widely used, and the demand for multi-color printing is increasing.

In order to realize multicolor printing on a material sheet in a box-making printing machine, it is ideal that the box-making printing machine is provided with a plurality of printing units in charge of printing each single color. However, the space ratio and cost ratio that the printing unit occupies in the entire box-making printing machine are not small. Therefore,
By providing a plurality of such printing units, the space ratio and the cost ratio that the printing units occupy in the whole box-making printing machine increase in proportion to the number of printing units.

Therefore, in a box-making printing machine, when it is necessary to use more ink colors than the number of printing units,
After the printing of the specific color, the entire ink circulation path in the printing unit, that is, the ink remaining in the ink circulation supply device for the ink roller is collected, and the inside of the ink circulation supply device is cleaned to wash the cleaned ink. A convenient method is adopted in which a plurality of colors exceeding the number of printing units can be printed by supplying different colors of ink to the circulation supply device. During the cleaning operation of the ink circulation supply device, the box printing machine is inevitably stopped.

Further, even in a box-making printing machine equipped with a large number of printing units capable of sufficiently meeting the demand for multicolor printing, the box-making printing machine is stopped at the end of lot production or the end of working hours. In this case, it is necessary to collect and wash the ink in the ink circulation supply device of the printing unit so that the printing ink will not be solidified by the start of the next operation and it will take too much time to restart. . As described above, the cleaning operation of the ink circulation supply device in the box-making printing machine is an operation that cannot be omitted when using the box-making printing machine regardless of the number of printing units to be mounted.

The ink circulation supply device in the conventional box-making printing machine has an excess in the ink forward path for sending the ink in the ink storage tank to the ink development chamber, the ink development chamber for applying the ink to the ink roller, and the ink development chamber. And an ink return path for returning the supplied ink to the ink storage tank. A pump for pressure-feeding the ink in the ink storage tank to the ink development chamber is provided in the middle of the ink outward path.

The ink developing chamber comprises an ink roller, an upper blade and a lower blade which make a pair in the vertical direction along the axial direction of the ink roller and are in sliding contact with the ink roller, and a pair of ink rollers arranged at both ends of the ink roller. It is a space surrounded by end blocks. Each end block is equipped with a seal end that seals the end of the ink roller so that ink cannot leak, and a discharge port for discharging the ink in the ink development chamber to the ink outward path is formed immediately before the seal end. Has been done.

The ink sent through the ink outward path is branched in the axial direction of the ink roller immediately before the ink developing chamber and is supplied into the ink developing chamber from a plurality of locations. The ink supplied to the ink developing chamber is spread so as to be thinly spread and spread on the entire outer peripheral surface of the ink roller by the upper blade that relatively slides by the rotation of the ink roller. Similarly, the relative sliding movement of the lower blade relative to the ink roller is scraped off, leaving a minimum amount of ink to be transferred to the plate cylinder located adjacent to the ink roller. The ink that has been scraped off
It flows down to the V groove portion of the ink development chamber formed in a V-shaped cross section by the lower blade and the ink roller, and is stored until it reaches a predetermined level. Ink that exceeds the specified level
The ink flows out through the discharge port. In this way, the discharge port in the ink development chamber functions to keep the amount of ink in the ink development chamber constant.

That is, in the printing unit of the box-making printing machine, in order to prevent ink from coagulating and to flexibly respond to a change in ink consumption amount due to a design to be printed,
It uses a mechanism that constantly supplies an amount of ink that exceeds the amount consumed by the ink roller, and ink that overflows in the ink development chamber continuously flows out from the discharge port. Therefore, the position and the opening area of the discharge port influence the situation such as the ink level and the uneven distribution of the ink in the ink development chamber, and become a factor that influences the print quality. Therefore, the position and the opening area of the discharge port are determined so as to be balanced with the ink supply amount, the capacity of the ink developing chamber, the ink consumption amount of the ink roller, etc. It is difficult to change.

A gutter-shaped duct having an open structure, which forms a part of the ink outward path, is installed below the discharge port formed in each of the pair of left and right end blocks. The gutter-shaped duct is installed in a downward inclined posture on the ink storage tank side, and the ink flowing down from the pair of outlets into the gutter-shaped duct is transferred from the downstream end of the gutter-shaped duct to the ink storage tank via a hose. To return.

[0011]

The ink circulation supply device in the conventional box-making printing machine described above is long in the work of collecting and cleaning the ink from the ink circulation supply device as a preliminary preparation for changing the ink color to be used. Since it takes time and the box-making press must be stopped during this time,
A decrease in the operating rate of box-making printing machines has become a problem due to an increase in demand for multi-color, multi-product, small-lot production. In an extreme case, the box printing press will be stopped for a longer time than the normal operation of the box-making printer, because of the ink collection and cleaning operations. Sometimes.

In consideration of this problem, in the conventional ink circulation supply device, in order to sufficiently carry out these operations both in ink recovery and cleaning operation,
The ink circulation supply device must be disassembled significantly.
However, the recovery work of the ink by disassembling requires an excessive work time. Therefore, regarding the recovery of ink, a method of blowing air from the ink forward path to send the ink to the ink return path, and a method of washing the ink circulation supply device is a method of sending cleaning water or a dedicated cleaning liquid from the ink forward path to wash away the residual ink. Is being sought.

With this method, a remarkable ink scavenging effect due to the blowing of air is achieved for the ink outward path, which is a closed conduit for pressure-feeding the ink, but this is sufficient for the ink in the ink development chamber. The problem is raised that it cannot be discharged. This is because the ink development chamber has a structure that holds a fixed amount of ink by setting the opening area and opening position of the discharge port. That is, the discharge port is provided above the bottom position of the V groove portion, and the opening area thereof is set to a small area that balances with the ink supply amount to the ink development chamber.

Regarding the cleaning of the ink circulation supply device, by adopting a water-soluble ink as the printing ink, it is possible to perform water cleaning without using an organic solvent. In addition, mechanical cleaning can be performed by circulating high-pressure cleaning water according to the procedure of supplying ink to the ink circulation supply device. However, even in this case, since the ink development chamber has a structure that holds a certain level of ink,
The cleaning liquid that has entered the ink development chamber passes over the liquid surface of the stagnant ink and exits from the discharge port to the outside, and because the opening area of the discharge hole is not sufficient, the speed of the cleaning liquid decreases and This raises the problem that a sufficient cleaning effect cannot be obtained.

According to the present invention, the position and the opening area of the discharge port of the ink developing chamber in the ink circulation supply device for the ink roller of the box-making press can be adjusted by blowing air or washing liquid even in the normal operation of the box-making press. Ink circulation in the ink roller of the box-making press can be achieved by improving the ink so that it can be replaced in a short time and improving the operating rate of the box-press. An object is to provide a supply device.

[0016]

According to a first aspect of the present invention, there is provided an ink circulation supply device for an ink roller of a box-making printing machine, wherein the ink roller and a plurality of slidable contact members slidably contact the ink roller in the axial direction of the ink roller. An ink development chamber that is formed along the line, an ink forward path that has a pump in the middle to send the ink from the ink storage tank to the ink development chamber, and an ink return path that recirculates the excess ink that overflows from the outlet of the ink development chamber to the ink storage tank. In an ink circulation supply device for an ink roller of a box-making printing machine, the sliding contact member includes an upper blade and a lower blade arranged along the axial direction of the ink roller, and a pair of left and right arranged at both ends of the ink roller. The drain port is a drain pipe that is rotatably or slidably provided on at least one of the end blocks. Form, the opening area of the outlet, characterized by varied by rotating operation or sliding operation of the drain pipe.

According to the present invention, since the opening area of the discharge port of the ink developing chamber can be changed by rotating or sliding the drain pipe, the discharge hole can be used during the normal operation of the box-making press. The opening area of the ink is set to an area suitable for normal operation, and an area where a certain amount of ink can be retained in the ink development chamber, and the ink as a prerequisite for ink replacement or when the box-making press is temporarily stopped At the time of collecting and cleaning work, the opening area of the discharge hole can be changed to an area suitable for communicating air or cleaning water by operating the drain pipe.

According to a second aspect of the present invention, in the ink circulation supply device for the ink roller of the box-making printing machine, the drain pipe has a plurality of discharge ports having different opening areas. One of the discharge holes is selected by rotating or sliding the pipe.

According to the present invention, a drain pipe having an opening area suitable for normal operation of the box-making printing machine is selected from the plurality of drain ports by rotating or sliding the drain pipe, or by operating the drain pipe. It is possible to select a discharge port having an opening area suitable for collecting ink from the ink circulation supply device and cleaning the ink circulation supply device.

An ink circulation supply device for an ink roller of a box-making printing machine according to claim 3 of the present application is claim 1 or claim 2.
On the premise of the invention described above, a drain pipe is provided in each of a pair of left and right end blocks, and an ink return path is provided with a closed pipeline that liquid-tightly connects the discharge ports of the pair of drain pipes. .

According to the present invention, since the ink supplied to the ink developing chamber overflows from both sides of the ink developing chamber, the ink storage conditions in the ink developing chamber can be made uniform over the entire axial direction of the ink roller. In addition, the ink pressed by the air pressure is discharged from two locations in the ink developing chamber even when the ink is collected by using the air blow, so that the collection time is shortened.
Further, for the same reason, the cleaning time of the ink circulation supply device is shortened. Further, it is possible to use the air pressure or the liquid pressure for the ink collecting work or the cleaning work even for the closed conduit forming a part of the ink return path.

According to a fourth aspect of the present invention, an ink circulation supply device for an ink roller of a box-making printing machine is based on the invention according to any one of the first to third aspects, and two systems are provided in the middle of the ink forward path. In addition to connecting the air blow conduit for supplying air or the cleaning liquid conduit for supplying the cleaning liquid to the additional pipeline due to the branch, the ink reservoir tank side between the additional pipeline and the branch point and between the branch point and the ink forward path It is characterized in that a sluice valve is provided between each end of the sluices.

According to the present invention, when the sluice valve of the ink outward path is opened and the sluice valve between the additional pipeline and the branch point is closed, communication of the ink outward path is ensured, and
The additional pipeline connected to the air blow pipeline or the cleaning fluid pipeline is
It will be in the cutoff state. Therefore, the ink supplied from the ink storage tank to the ink outward path passes through the same path as before the installation of the additional pipeline, and the printing unit can be normally operated. On the other hand, while closing the sluice valve on the ink forward path,
By opening the sluice valve between the additional pipeline and the branch point, the air or the cleaning liquid can be immediately supplied into the ink outward path through the additional pipeline, so that the ink in the ink circulation supply device is expelled, and after that. In addition, the residual ink remaining in the ink circulation supply device can be washed using air pressure or water pressure.

According to a fifth aspect of the present invention, an ink circulation supply device for an ink roller of a box-making printing machine is premised on the invention according to any one of the first to third aspects, and three systems are provided in the middle of the ink forward path. And an air blow pipeline for supplying air to one of the two additional pipelines by branching, and a cleaning fluid pipeline for supplying a cleaning fluid to the other one of the additional pipelines. It is characterized in that a sluice valve is provided between the additional pipeline and the branch point, and between the branch point and the end of the ink outward path on the ink storage tank side.

According to the present invention, if the sluice valve of the ink outward path is opened and the two additional pipelines are closed, the additional pipeline can be ignored regarding the communication of ink. Also, by closing the sluice valve of the ink outward path and the sluice valve of the additional pipeline to which the washing water pipeline is connected, and opening the sluice valve of the additional pipeline to which the air blow pipeline is connected, air can be supplied into the ink outward path. In addition, by closing the sluice valve of the ink outward path and the sluice valve of the additional pipeline to which the air blow pipeline is connected, and opening the sluice valve of the additional pipeline to which the cleaning liquid pipeline is connected, it is possible to select an arbitrary volume in the ink forward path next to air. A cleaning liquid can be supplied.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

The box-making printing machine incorporates a printing unit 10 having a function of printing a design or the like on the material sheet W1 (FIG. 1). The ink circulation supply device 20 of the ink roller of the box-making printing machine is a device having an ink circulation function and continuously supplying the ink for printing to the ink roller 32 of the printing unit 10. Further, the printing unit 10 is preceded by a feeder device 10F for continuously supplying the material sheet W1 to the printing unit 10.

The feeder device 10F is a device for feeding the material sheet W1 by the frictional force of the soft belt B which is circulated and driven (FIG. 2). The feeder device 10F has a material sheet W1.
It is composed of an upper feeder conveyor AB and a lower feeder conveyor BB which are arranged in pairs in the width direction. The lower feeder conveyor BB has a driving roller R4 and a leading roller R.
3, the material sheet W1 is received from below by the belt B circulatingly driven between the rear end roller R2 and the tension roller R4. On the other hand, the upper feeder conveyor AB has a drive roller R
1, the tension roller R2, the leading end roller R3, the trailing end roller R4, the guide rollers R5, R6, ...

The printing unit 10 of the box-making printing press includes a printing roller 16 for mounting a printing plate showing a design, a press roller 15 for pressing the material sheet W1 onto the printing roller 16,
A basic structure in which an ink roller 32 for supplying ink to a printing plate attached to the printing roller 16 is combined using a pair of side frames 11 arranged at both ends of these roller groups, and an ink circulation supply device 20 is attached thereto. Have. Printing in the printing unit 10 is performed by the printing roller 16
The material sheet W1 between the press roller 15 and the press roller 15 by the arrow A1.
It is carried out by feeding in the direction (FIGS. 1 and 2).

The pair of side frames 11 are respectively
Fixed frame 11A to be installed on the floor and fixed frame 11
The movable frame 11B moves up and down with respect to A (FIGS. 1 and 2). A drive motor M1 for driving the movable frame 11B is installed between the pair of side frames 11. Between the pair of side frames 11, a transmission shaft 14 having a gear G2 mounted in the middle is provided laterally, and the drive motor M1 rotationally drives the transmission shaft 14 by a pinion gear G1 meshing with the gear G2.

Both ends of the transmission shaft 14 are fixed to the fixed frame 11A.
Is input to a gear box G3 that is disposed outside the pair of fixed frames 11A. Each gear box G3 has a function of converting an input from the horizontal direction into rotation of the screw shaft S1 in the vertical direction. The screw shaft S1 has a screw bracket 1 fixed to the movable frame 11B.
2b are screwed together, and the screw bracket 12b moves up and down as the screw shaft S1 rotates. That is, the rotation of the drive motor M1 is converted into the vertical movement of the movable frame 11B by such a power transmission path.

The press roller 15 of the box-making printer is attached to the fixed frame 11A, and the printing roller 16 and the ink roller 32 are attached to the movable frame 11B side. Therefore, by operating the movable frame 11B in the vertical direction, the distance between the press roller 15 and the printing roller 16 can be adjusted, and the two can be widely opened to perform the work of exchanging the printing plate or the maintenance work. You can

The ink roller 32 is mounted on the movable frame 11B so as to be swingable by using an independent dedicated swing frame 19. The pair of left and right swing frames 19 are connected to each other by a horizontal frame 33 provided laterally along the ink roller 32. The blade holder 21 is attached to the horizontal frame 33. Movable frame 1
A pedestal 17 is installed in each of 1B. The swing frame 19 is supported by the pedestal 17 via a swing shaft 18, and a swing cylinder 1 (not shown) serves as a power source.
It reciprocally swings in the direction of arrow A2 about 8 (FIG. 2).
The ink circulation supply device 20 supplies ink to the ink roller 32, and the ink roller 32 moves to and away from the print roller 16 by the reciprocating rocking motion to transfer the ink.

The ink circulation supply device 20 includes an ink developing chamber 2E for applying ink to the ink roller 32, an ink forward path 20A for feeding the ink in the ink storage tank 2T to the ink developing chamber 2E, and an ink overflowing in the ink developing chamber 2E. Ink return path 2 for returning the ink to the ink storage tank 2T
It consists of 0B.

The ink outward path 20A is mainly formed by a combination of tube materials. The ink storage tank 2T is arranged at a lower position than the ink development chamber 2E, and the ink storage tank 2T
A start-up tube 2A that raises the ink to the level of the ink development chamber 2E is connected to T. A pressure pump 2 driven by a drive motor M2 is provided in the middle of the start-up pipe 2A.
P is interposed. The tip of the riser pipe 2A is bent in the horizontal direction along the ink roller 32, and the end of the riser pipe 2A is laterally fed through the rotary joint 2b.
Are connected. A 90 ° -bent joint pipe 2C is attached to the tip of the lateral feed pipe 2B. Fitting tube 2C
On the other hand, the ink development chamber 2
It is connected to 21 of E and opens in the ink development chamber 2E.

The blade holder 21 has a distribution pipe passage (not shown) for ejecting the ink supplied from the connecting pipe laterally along the ink roller 32 and ejecting the ink into the ink developing chamber 2E from a plurality of nozzles. The ink distribution path is formed and forms a part of the ink outward path 20A.

The ink developing chamber 2E includes an ink roller 32.
An upper blade 22 and a lower blade 23 slidingly contacting the surface of the ink roller 32 along the axial direction of the ink roller 32 at a predetermined vertical interval, and end blocks 24 and 2 slidingly contacting the ink roller 32 at both end positions of the ink roller 32.
It is a space partitioned by 4 and 4 (FIGS. 2 and 3). Each of the upper blade 22 and the lower blade 23 is made of a self-lubricating, abrasion-resistant resin material such as nylon resin or Teflon (registered trademark) resin, and is formed into a strip plate shape having a constant width as a whole.

The upper blade 22 corresponds to the rotation direction arrow A3 of the ink roller 32 and the ink roller 3 at that time.
It is fixed to the blade holder 21 in a direction that follows the traveling direction of the surface of 2. On the other hand, the lower blade 23 is attached so as to face the traveling direction of the surface of the ink roller 32. To attach the upper blade 22 and the lower blade 23 to the blade holder 21, holding plates 22b and 23b having the same length are used. A seal end 25 made of a soft liquid-tight material is fixed to each end block 24 by a set screw 25B, and the pair of seal ends 25 and 25 seal both ends of the ink development chamber 2E so that ink cannot leak. (Figs. 3 and 4).

A through hole 24H is formed in each end block 24 so as to penetrate the end block 24 in the vertical direction. Further, the end block 24 is formed with a long hole H3 communicating with the inside of the ink development chamber 2E. Through hole 2
The position where 4H is provided is inside the seal end 25, that is, near the center of the ink development chamber 2E, and the vertical length of the slot H3 extends over the entire vertical width of the ink development chamber 2E.

The through hole 24H of each end block 24 is
Drain pipe 26 having two types of outlets H1 and H2
Are tightly and rotatably loaded (Fig. 4). The drain pipe 26 has a shaft hole 26C formed at one end of a resin round bar having an outer shape corresponding to the inner diameter of the through hole 24H, and the other end is hollowed to be hollow. Outlet H2 and top / bottom 1 corresponding to
The pair of small-diameter outlets H1 and H1 are formed.
The elongated hole-shaped outlet H2 and the small-diameter outlets H1 and H1 are provided at different angular positions in the radial direction.

Above the pair of end blocks 24, 24, the air motor 2 having two input ports 27A, 27B is provided.
7 is arranged and the shaft of the air motor 27 is the drain pipe 2
6 is connected. The air motor 27 is the drain pipe 26.
Is driven at a predetermined angle in one direction or in forward and reverse directions, so that the elongated hole H3 of the end block 24 and the elongated hole-shaped discharge port H2 of the drain pipe 26 are aligned with each other, or the elongated hole H3 and the small-diameter discharge hole The outlets H1 and H1 are controlled so as to coincide with each other. A square pipe joint 2F is screwed on the lower side of the pair of end blocks 24, 24 by a pipe screw 2N.

The ink return path 20B is constituted by a conduit connecting the lower ends of the left and right end blocks 24, 24 to the ink storage tank 2T (FIGS. 1 and 3). The left and right end blocks 24, 24 are provided with a closed pipe line 2G connecting the pipe joints 2F, 2F, that is, the discharge ports H1, H2 of the pair of drain pipes 26, 26 are connected by the closed pipe line 2G. Has been done. However, a short extension pipe 2M is interposed between the end block 24 located on the ink storage tank 2T side and the pipe joint 2F, and the closed pipe line 2G slightly descends toward the end block 24 side including the extension pipe 2M. It is installed horizontally in an inclined position. In addition, the closed pipe line 2G is temporarily
It is opened below the end block 24.

Below the closed pipe 2G, a gutter-shaped duct 2J is arranged along the closed pipe 2G, and a pipe joint 2H is attached to the downstream end of the gutter-shaped duct 2J. The pipe joint 2H is connected to an L-shaped bent return pipe 2L, and the other end of the return pipe 2L reaches the ink storage tank 2T. As a result, the ink that has overflowed from the ink development chamber 2E has a pair of drain pipes 26.
Is discharged to the downstream end of the gutter-shaped duct 2J from the outlets H1 and H2 of the above, and is returned to the ink storage tank 2T via the return conduit 2L connected to the gutter-shaped duct 2J.

To collect the ink in the ink circulation supply device 20 shown in the above embodiment, the rising pipe 2A of the ink outward path 20A connected to the ink storage tank 2T is removed, and the air compressor is attached to the end of the rising pipe 2A. This can be completed in a short time by connecting an air source such as the above to blow air into the ink circulation supply device 20 and then pressure-feed the cleaning liquid into the ink circulation supply device 20. The drain pipes 26, 26 located on the left and right of the ink developing chamber 2E are driven by the air motors 27, 27 so as to use the elongated hole-shaped outlet H2. That is,
The long hole H3 of each end block 24 and the long hole-shaped discharge port H2 of the drain pipe 26 are aligned with each other, and the large-sized discharge port H2 over the entire vertical width of the ink development chamber 2E is set to a usable state without limitation. Has been done.

The air blown from the end of the rising tube 2A forces the ink remaining in the tube into the ink developing chamber 2E.
The ink that has been driven in and ejected into the ink development chamber 2E is driven into the closed conduit 2G from the discharge ports H2 of the drain pipes 26 located on the left and right. At this time, the ink in the ink development chamber 2E passes through the maximumly secured discharge port H2 and easily reaches the sealed conduit 2G, so that the amount of ink remaining in the ink development chamber 2E is minimized. It can be limited. The ink in the closed conduit 2G collects on the one end block 24 side according to the inclined posture. The collected ink flows down to the gutter-shaped duct 2J below, and the gutter-shaped duct 2J
It returns to the ink storage tank 2T via the return conduit 2L attached to one end of the. Although it depends on the viscosity of the ink used, the working time required during this period is short.

In the same manner, when the cleaning liquid in the ink circulation supply device 20 and the ink used in the printing unit 10 are water-soluble, the cleaning water is pressure-fed to adhere to the inside of the ink circulation supply device 20. The remaining ink can be washed off in a short time. Also in this case, the drain port 26 has a large opening area H2.
Since the washing water does not remain in the ink developing chamber 2E by selecting, the operation of the box-making printing machine can be immediately restarted by using the inks of different colors.

Next, another embodiment will be described.
The ink circulation supply device 20 in the printing unit 10 of the box-making printing machine is provided with one or both of the air blow conduit 2M for blowing air into the ink outward path 20A and the cleaning liquid conduit 2N for pumping the cleaning liquid. It can be connected (FIG. 5).

A partition valve V1 is provided near the ink storage tank 2T of the start-up pipe 2A of the ink outward path, and a branch point is provided by interposing a three-way pipe joint or the like at two locations after the partition valve V1. X1 and X2 are formed so that any additional pipeline can be connected. An air blow conduit 2M and a cleaning liquid conduit 2N are connected to the two branch points X1 and X2, respectively. The air blow conduit 2M has a sluice valve V2 and an air pump P1 in the middle.
And an air filter AF is attached to the end. Further, the cleaning liquid pipeline 2N includes a sluice valve V3 and a pressure feed pump P2 in the middle, and reaches the cleaning liquid tank 2K at the end.

In this embodiment, when the ink is circulated from the ink circulation supply device 20, the sluice valve V1 on the ink storage tank 2T side is closed and the sluice valve V2 of the air blow conduit 2M is opened immediately. Air can be blown into the ink outward path 20A to expel the ink. Next, the gate valve V2 of the air blow conduit 2M
By closing the valve and opening the partition valve V3 of the cleaning liquid conduit 2N, the cleaning liquid can be immediately sent to the ink outward path 20A, so that the recovery efficiency of the ink from the ink circulation supply device 20 and the cleaning work efficiency can be further improved. It should be noted that the air blow conduit 2M and the cleaning liquid conduit 2N may be connected, for example, so that which one of the two-way valves is used can be selected and connected to one branch point provided in the ink outward path 20A. .

The size of the drain port of the drain pipe 26 is changed to a method of selecting the drain ports H1 and H2 having different opening areas, and when the drain pipe 26 is driven to rotate or slide, It may be a continuously changing method. In this case, the discharge port of the drain pipe 26 and the long hole H3 on the side of the end block 24 are operated to overlap each other. An electric actuator other than air, such as a stepping motor, can be used to drive the drain pipe 26. Further, since it does not require a large operating force, it may be manually operated.

[0051]

According to the ink circulation supply device for the ink roller of the box-making printing machine of the present invention, the ink level in the ink development chamber is set to a predetermined level in the end block of the ink development chamber for applying an appropriate amount of ink to the ink roller. The discharge port provided for the purpose of maintaining is formed in a drain pipe provided rotatably or slidably with respect to the end block so that the opening area of the discharge port can be changed by a rotating operation or a sliding action on the drain pipe. Because I did
By making the opening area of the discharge port reversibly large, it is possible to discharge ink in the ink development chamber and wash residual ink by air blow from the ink forward path, which was difficult in the past, and to stop the box printing machine. It is possible to significantly reduce the time required to replace the ink colors and improve the operating rate of the box-making printing machine.

[Brief description of drawings]

FIG. 1 is a perspective view of the overall configuration showing an embodiment of an ink circulation supply device of the present invention.

FIG. 2 is a side view showing a combination with the feeder device according to the above embodiment.

FIG. 3 is a perspective view of a main part in the above embodiment.

FIG. 4 is an exploded perspective view of a main part in the above embodiment.

FIG. 5 is a piping diagram showing another embodiment of the ink circulation supply device of the present invention.

[Explanation of symbols]

H1 outlet H2 outlet X1 branch point X2 branch point 20 Ink circulation supply device 20A ink outbound 20B ink return path 2E ink development room 2G closed pipeline 2M air blow conduit 2N cleaning liquid pipeline 2P pump 2T ink storage tank 22 Upper blade (sliding member) 23 Lower blade (sliding member) 24 end block (sliding member) 26 Drain pipe 32 ink roller V1 gate valve V2 gate valve V3 gate valve

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B41F 31/08 B41F 31/20 B41F 35/00

Claims (5)

(57) [Claims] 1. An ink developing chamber formed along an axial direction of the ink roller by an ink roller and a plurality of sliding contact members slidably contacting the ink roller, and a pump provided in the middle to transfer ink from an ink storage tank to the ink developing chamber. Ink forward route to send in,
In an ink circulation supply device for an ink roller of a box-making printing machine, comprising an ink return path for returning excess ink overflowing from an outlet of the ink development chamber to an ink storage tank, the sliding contact member is arranged along the axial direction of the ink roller. It is composed of an upper blade and a lower blade arranged and a pair of left and right end blocks arranged at both ends of the ink roller, and the discharge port is formed in a drain pipe rotatably or slidably provided in at least one end block. The opening area of the discharge port is changed by rotating or sliding the drain pipe. An ink circulation supply device for an ink roller of a box-making printer. 2. The manufacturing method according to claim 1, wherein a plurality of discharge ports having different opening areas are formed in the drain pipe, and any one of the discharge holes is selected by rotating or sliding the drain pipe. Ink circulation supply device for ink roller of box printing machine. 3. A drain pipe is provided on each of the pair of left and right end blocks, and the ink return path is provided with a closed pipeline that liquid-tightly connects the discharge ports of the pair of drain pipes. An ink circulation supply device for an ink roller of a box-making printing machine according to claim 1 or 2. 4. The ink forward path is branched into two systems, and an air blow pipeline for supplying air or a cleaning liquid pipeline for supplying a cleaning liquid is connected to the additional pipeline by the branch, and the additional pipeline and a branch point are provided. 4. An ink for a box-making printing press according to claim 1, wherein a partition valve is provided between the branch point and the end of the ink outward path on the ink storage tank side. Roller ink circulation supply device. 5. An ink blow path is branched into three systems, an air blow pipeline for supplying air is connected to one system of two additional pipelines by branching, and the other one of the additional pipelines is connected. A cleaning liquid pipeline for supplying the cleaning fluid is connected, and a sluice valve is provided between each additional pipeline and the branch point, and between the branch point and the end on the ink reservoir side of the ink outward path. Any one of claims 1 to 3
An ink circulation supply device for an ink roller of a box-making printing machine according to the item.