WO2006106715A1

WO2006106715A1 - Ink container

Info

Publication number: WO2006106715A1
Application number: PCT/JP2006/306435
Authority: WO
Inventors: Masayuki Izume; Shigenobu Kajitani
Original assignee: I. Mar Planning Inc.
Priority date: 2005-03-30
Filing date: 2006-03-29
Publication date: 2006-10-12
Also published as: JP2006272865A

Abstract

An ink container capable of automating the replenishment of ink to an inkpot and simplifying setup operations and reducing setup operation time by further automating the setup operations. The ink container (65) is characterized in that it is formed in a vertically compressible bellows shape, a slit closed normally is formed in a bottom wall (72), and when an upper part is pressed downward while a bottom part is held, a slit portion is opened by a pressure and the ink therein falls downward through the opened slit portion.

Description

Specification

Ink container

Technical field

[0001] The present invention relates to an ink container used in a printing press.

Background art

[0002] In an ordinary printing press, an ink fountain roller is disposed in the vicinity of an ink fountain member that constitutes an ink fountain, and an ink force that has been ejected from the ink fountain to the outer peripheral surface of the ink fountain roller. The ink is transferred to a roller, and this ink is further supplied to the printing surface of the printing portion through a plurality of ink kneading rollers.

[0003] Conventionally, the ink fountain member has a plate shape, and the ink force in the ink fountain S passes through the ink path between the ink fountain member and the ink fountain roller, and comes out on the outer peripheral surface of the ink fountain roller. The

[0004] In such a printing machine, the type of ink to be used may change depending on the content of printing. In such a case, when the previous printing is completed, the ink in the ink fountain is used for the next printing. The work of changing the setup to replace what is used is performed. This setup change operation includes collecting old ink in the ink fountain and cleaning the ink fountain member and each roller.

[0005] In conventional printing presses, the ink transfer roller and the ink kneading roller are automatically cleaned by so-called inker cleaning. The ink fountain roller and ink fountain material are difficult to automate the cleaning. As described above, manual cleaning was performed. That is, when the previous printing is finished, the ink fountain roller stops rotating, remains in the ink tank, and the ink is manually removed and touches the ink on the ink fountain roller and ink fountain member. The part was washed by hand. For this reason, collecting and cleaning old ink is cumbersome, and it is necessary to manually clean the ink fountain member and the ink fountain roller, so it takes time to change the setup, and until the next printing starts. It took a long time.

[0006] In addition, the size (width) of the ink passage may be changed depending on the content of printing. In the past, the size of the ink passage was adjusted by changing the position and angle of the ink fountain member, but this adjustment was also troublesome.

[0007] Therefore, the inventor of the present invention has proposed a printing machine described in Patent Document 1.

[0008] This printing machine includes an ink fountain member having an ink fountain forming surface, an ink fountain roller that ejects ink to the outer peripheral surface through an ink passage between the ink fountain member, and an outer surface of the ink fountain roller. A plurality of rollers for supplying the ink to the printing area, a belt-like sheet placed on the ink fountain member so as to be in close contact with the ink fountain forming surface and moving the belt-like sheet in its length direction A pair of weir plates that are attracted to the ink fountain forming surface from above the sheet by the permanent magnets and adsorbed to the outer peripheral surface of the ink fountain roller to form the side walls of the ink fountain, and the ink fountain roller The ink collection tank placed near the bottom of the ink collection tank, the ink removal blade provided in the ink collection tank, and the ink removal blade pressed against the outer peripheral surface of the ink source roller And a blade position switching device for switching to take a position and an ink fountain roller force separation Ru standby position. Further, the ink fountain member is rotated by an ink fountain member rotating device and is positioned at a plurality of work positions. When the ink fountain member is positioned at each work position around the ink fountain member, A plurality of ink fountain forming surfaces are formed in the direction of rotation of the ink fountain member so that the ink passage forming portion at the leading end is adjacent to the ink fountain roller and forms the ink fountain member. The distance to the ink passage forming part is different from each other.

Patent Document 1: Japanese Patent No. 3194174

Disclosure of the invention

Problems to be solved by the invention

[0009] In the above-described printing machine, it is possible to make the setup change work easier than before and to shorten the work time.

[0010] However, the replacement of old and new dam weir plates and the replacement of new fountain ink to ink fountains cannot be performed automatically, simplifying the changeover work and working time. The shortening is not enough.

[0011] Since the weir plate is firmly adsorbed to the ink fountain forming surface and the outer peripheral surface of the ink base roller by the permanent magnet, it is difficult to automatically replace it. Barrage using electromagnets If the ink is adsorbed on the ink forming surface and the outer peripheral surface of the ink base roller, the weir plate can be easily and automatically replaced by stopping energization of the electromagnet. However, in this case, it is necessary to always energize the electromagnet during printing, and there is a problem that the electromagnet's heat generation and its adverse effect are great. Therefore, it is necessary to use a permanent magnet.

[0012] In addition, it is difficult to automatically replenish ink fountain with ink placed in a metal can or the like.

[0013] Further, when performing a large amount of printing, since a large amount of desired ink can be put into the ink fountain at a time, the ink in the ink fountain deteriorates during printing, and the print quality is adversely affected. There is a problem. As for the force, there is a case where a large amount of old ink remains at the time of changing the setup. In this case, it takes time to collect the remaining ink just as the remaining ink is wasted.

[0014] The object of the present invention is to solve the above-mentioned problems, enable the automatic replenishment of ink to the ink fountain, further automate the setup change work, and thereby simplify the setup change work and reduce the work time. An object of the present invention is to provide an ink container that can be shortened.

Means for solving the problem

[0015] The ink container of claim 1 has a bellows shape that is compressible in the vertical direction, and a cut that is normally closed is formed in the bottom wall. When the bottom is held and the top is pushed downward, The notch is opened by pressure, and the ink inside falls through the opened notch and drops down! /.

[0016] The bottom wall of the ink container in which the cut is formed is formed of a material having a high elastic modulus, such as a material having a high elastic modulus, plastics, or the like.

[0017] By holding the bottom of the ink container and pushing the top downward, the ink inside the container falls downward, so that the ink container is placed above the ink fountain while the bottom of the ink container is held. Simply move and press the top of the ink container to refill the ink fountain. Therefore, it is possible to easily automate the ink supply to the ink fountain.

[0018] The ink container according to claim 2 is the ink container according to claim 1, wherein a plurality of linear cuts are formed in the bottom wall to form at least one polygonal tongue. It is a characteristic. [0019] The ink container according to claim 3 is the ink container according to claim 2, characterized in that a plurality of cuts are formed radially to form a plurality of triangular tongues. .

[0020] The ink container according to claim 4 is the ink container according to claim 2, characterized in that the notch has a U-shape and one rectangular tongue is formed.

[0021] The ink container according to claim 5 is the ink container according to claim 2, characterized in that the notch is H-shaped and two rectangular tongues are formed.

[0022] When a polygonal tongue-like portion is formed by a plurality of cuts on the bottom wall of the ink container, the tongue-shaped portion is surely elastically deformed when pressure is applied, and the cut portion is opened. The ink can be reliably dropped.

[0023] In particular, when the tongue-shaped portion has a rectangular shape, the bottom wall is formed thick with a highly rigid material, and the notch portion is securely closed when no pressure is applied, causing ink leakage. Even if it can be prevented, when the pressure is applied, the tongue-like portion is surely elastically deformed, the cut portion is opened, and the ink can be reliably dropped.

[0024] The ink container of claim 6 is the one according to any one of claims 1 to 5, wherein the outer diameter of the hole formed in the bottom wall of the bellows-like container body is larger than that of the container body. A small cylindrical part is formed in a downward projecting shape and integrally, and a bottom cover with a hole formed in the cylindrical part is fixed in a downward force detachable manner, and a thin plate-shaped bottom plate is fitted in the bottom cover, The outer peripheral edge of the bottom plate is clamped between the bottom wall of the bottom lid and the bottom end surface of the cylinder, and a notch is formed in the bottom plate that forms the bottom wall facing the hole in the bottom lid. It is characterized by that.

In this case, the bottom lid and the bottom plate can be removed from the cylindrical portion of the container main body, and ink can be put into the container. Also, only the bottom plate on which the cut is formed can be formed of a special material suitable for the purpose.

The invention's effect

[0026] According to the ink container of claim 1, as described above, it is possible to automate the replenishment of ink to the ink fountain, further automate the setup change work, and simplify the setup change work by it. In addition, the work time can be shortened.

[0027] According to the ink container of claims 2 to 5, as described above, when pressure is applied, the tongue-shaped portion is reliably elastically deformed and the cut portion is opened, and the ink is reliably dropped. Can wear.

[0028] In particular, according to the ink container of claims 4 and 5, as described above, the bottom wall is formed thick with a high-rigidity material so that the notch portion is formed when no pressure is applied. Even if it can be closed securely to prevent ink leakage, the tongue can be elastically deformed when pressure is applied, and the incision can be opened to reliably drop the ink. .

[0029] According to the ink container of claim 6, as described above, the bottom lid and the base plate can be removed from the cylindrical portion of the container body, and the ink can be put into the container, and a notch is formed. Only the bottom plate can be made of a special material suitable for that purpose.

Brief Description of Drawings

FIG. 1 is a schematic side view of a main part of an ink supply device of a printing press.

FIG. 2 is a plan view of FIG.

[FIG. 3] FIG. 3 is a partially cut-out plan view of a portion of an ink transfer division / division roller unit.

FIG. 4 is a cross-sectional view of FIG.

FIG. 5 is an enlarged view of a part of FIG.

[Fig. 6] Fig. 6 is a longitudinal sectional view showing a portion of an ink container and an ink supply device.

FIG. 7 is a bottom view of FIG.

FIG. 8 is a side view showing portions of the ink container and the ink supply device.

FIG. 9 is an enlarged longitudinal sectional view showing the bottom of the ink container.

FIG. 10 is an enlarged cross-sectional view of the dam plate mounting table.

FIG. 11 is a side view showing the operation of the weir plate changing device.

FIG. 12 is a drawing corresponding to FIG. 5, showing a modification of the ink fountain member.

FIG. 13 is a drawing corresponding to FIG. 5 and showing another modified example of the ink fountain member.

FIG. 14 is a bottom view showing a modified example of the ink container.

FIG. 15 is an enlarged longitudinal sectional view showing the bottom of the ink container of FIG.

FIG. 16 is a bottom view showing another modification of the ink container.

FIG. 17 is an enlarged longitudinal sectional view showing the bottom of the ink container of FIG.

Explanation of symbols

[0031] (65) Ink container (67) Container body

(68) Hole

(69) Tube

(70) Bottom cover

(71) Hole

(72) Bottom plate

(73X112X114) Notch

(111X113X115) Tongue

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a left side view schematically showing a part of an ink supply device of a printing press, and FIG. 2 is a plan view of the same. In the following description, the right side of FIGS. 1 and 2 is the front, the left side is the rear, and the left and right when viewed from the front are the left and right.

[0034] In Figs. 1 and 2, the first ink of the plurality of ink kneading rollers behind the ink fountain roller (3) adjacent to the rear end of the ink fountain member (2) forming the ink fountain (1). A kneading roller (4) is arranged, and an ink transfer dividing roller unit (5) is arranged between the original roller (3) and the kneading roller (4). The axes of the original roller (3) and the kneading roller (4) are parallel to each other and extend in the left-right direction. The original roller (3) and the kneading roller (4) are rotatably supported on the frame (7) of the printing press, and are rotated in the direction of the arrow in FIG. 1 at a predetermined rotational speed by a driving device (not shown). The rotation speed of the former roller (3) is about 1Z10 that of the kneading roller (4).

Details of the split roller unit (5) are shown in FIGS. FIG. 3 is a partially cutaway plan view of the split roller unit (5), with the lower side of the figure being the front and the upper side being the rear. 4 is an enlarged cross-sectional view of a part of FIG.

[0036] The left and right ends of the linear support member (6) parallel to the rollers (3) and (4) are fixed to the frame (7), and a plurality of movable members (8) are provided around the support member (6). It is attached. The support member (6) has a prismatic shape having a slightly larger front-rear width than the vertical width. The movable member (8) has a short cylindrical shape, and the movable member (8) is formed with a relatively large square hole (9) penetrating in the axial direction. A pair of end-cylinder fixing members that are fixed to the frame (7) so as to face each other and penetrate the support member (6) A plurality of movable members (8) are arranged in the axial direction between (10), and the support member (6) is passed through the holes (9) of these movable members (8). The vertical width of the hole (9) of the movable member (8) is such that the upper and lower surfaces of the hole (9) are substantially equal to the vertical width of the support member (6) and are in sliding contact with the upper and lower surfaces of the support member (6). In addition, the movable member (8) whose front and rear width of the hole (9) is slightly larger than the front and rear width of the support member (6) is such that the rear surface of the hole (9) is opposed to the support member (6). The front end position in contact with the rear surface and the front surface of the hole (9) can move back and forth between the rear end position in contact with the front surface of the support member (6). A square groove (11) extending over the entire length of the movable member (8) is formed on the upper surface of the hole (9) of the movable member (8) in sliding contact with the support member (6).

[0037] As will be described later, each movable member (8) is positioned in the axial direction with respect to the support member (6), and between the movable members (8) and between the fixed members (10) at both ends. Has a slight gap in the axial direction. Therefore, each movable member (8) can move individually in the front-rear direction with respect to the support member (6).

An inner ring of a ball bearing (12) that is a rolling bearing is fixed to the outer periphery of each movable member (8).

A metal sleeve (14) is fixed to the outer periphery of the outer ring of each ball bearing (12), and a rubber thick cylindrical ink transfer roller (15) is fixed to the outer periphery of the sleeve (14).

[0039] A short cylindrical dustproof member (16) is fitted between the outer peripheries of adjacent movable members (6). The dust-proof member (16) is made of an appropriate rubber-like elastic material such as natural rubber, synthetic rubber, or synthetic resin, and has flange portions (16a) that slightly protrude inward at both ends thereof. . These flange portions (16a) are fitted into an annular groove (17) formed on the outer peripheral surface of the portion near the left and right ends of the movable member (8), whereby the dustproof member (16) is moved to the movable member (8 ). A similar dustproof member (16) is fitted between the outer peripheries of the movable member (8) at both the left and right ends and the fixed member (10) adjacent thereto.

[0040] A roller position switching device (19) for switching the position of the ink transfer roller (15) is provided on the support member (6) side between each movable member (8) and the support member (6) as follows. Is provided.

[0041] A cylinder portion (20) is formed by forming a hole extending slightly from the front to the rear in the portion of the support member (6) corresponding to the axially central portion of the movable member (8). A spring receiving hole (21) extending slightly forward is formed. The center of the cylinder part (20) and the center of the spring accommodating hole (21) are one straight line in the front-rear direction near the center of the movable member (8) in the vertical direction. It's above. A short cylindrical piston (22) is inserted into the cylinder (20) through an O-ring (23) so as to be slidable back and forth. A ball (24) as an urging member is slidably inserted in the spring accommodating hole (21), and a compression coil spring (25) that urges the ball backward is inserted.

[0042] A recess (26X27) is formed on the front surface of the hole (9) of the movable member (8) facing the center of the piston (22) and the rear surface of the hole (9) facing the center of the ball (24), respectively. Is formed. The movable member of each recess (26) (27) (8) The axial width is constant. The cross-sectional shape of each recess (26X27) in the cross section orthogonal to the axis of the movable member (8) is uniform, and forms an arc shape centered on a straight line parallel to the axis. A tapered tapered protrusion (22a) is formed at the center of the end face of the piston (22) facing the recess (26), and the protrusion (22a) is fitted into the recess (26). Note that the length of the part excluding the protrusion (22a) of the piston (22) is slightly shorter than the length of the cylinder part (20), even when the piston (22) is most retracted into the cylinder part (20). The majority of the protrusion (22a) protrudes from the front surface of the support member (6). On the other hand, a part of the outer periphery of the ball (24) is fitted in the recess (27).

[0043] The ball (24) is always brought into pressure contact with the rear surface of the hole (9) of the movable member (8) by the elastic force of the spring (25) to the rear portion of the support member (6). A part of the outer periphery of (24) is brought into pressure contact with the front and rear edges of the recess (27), as well as the recess (27). On the other hand, at the front of the support member (6), the front surface of the support member (6) or the piston (22) is brought into pressure contact with the front surface of the hole (9) of the movable member (8), and the piston (22) Most of the protrusion (22a) is fitted in the recess (26). In this way, most of the protrusion (22a) of the piston (22) and a part of the force of the ball (24) are always stuck in the recesses (26) and (27). The movable member (8) is positioned in the axial direction.

[0044] The support member (6) is formed with an air supply hole (28) whose left end force extends in the axial direction and is closed near the right end, and the left end open end of the hole (28) is compressed through an appropriate pipe. Connected to air source (29).

[0045] A switching valve (solenoid valve) (30) is mounted on the upper surface of the support member (6) facing the groove (11) of the movable member (8), and the two ports of this valve (30) are supported. The air supply hole (28) and the cylinder part (20) are communicated with each other through communication holes (31) and (32) formed in the member (6). Valves (30) The electric wire (33) is drawn out through the groove (11) and connected to the control device (34).

[0046] In a state where the valve (20) is energized (on state), the cylinder part (20) is communicated with the air supply hole (28) via the valve (30), and the energization is stopped (off state). Then, the cylinder part (20) communicates with the atmosphere via the valve (30). Then, by individually switching the energization state of the valve (30) of each switching device (19) by the control device (34), the position in the front-rear direction of each ink transfer roller (15) is individually switched.

When the valve (30) is switched to the OFF state, the cylinder part (20) is brought into communication with the atmosphere, so that the piston (22) can move freely in the cylinder part (20). For this reason, the movable member (8) is moved to the rear side via the ball (24) by the spring (25). As a result, the movable member (

8) and the ink transfer roller (15) are switched to the rear end position, and the ink transfer roller (15) moves away from the original roller (3) and presses against the kneading roller (4).

[0048] When the valve (30) is switched to the ON state, the cylinder part (20) is communicated with the air supply hole (28) and further through the compressed air source (29), so that the cylinder part (20) Compressed air is supplied to For this reason, the piston (22) protrudes forward of the force of the support member (6), piled on the force of the spring (25), and thereby the movable member (8) is moved forward. As a result, the movable member (8) and the ink transfer roller (15) are switched to the front end position, and the ink transfer roller (15) moves away from the kneading roller (4) and presses against the original roller (3).

[0049] A position switching detection sensor (102) made of a magnetic sensor is fixed in an embedded manner on the lower surface of the support member (6) that is in sliding contact with the bottom wall of the hole (9) of the movable member (8), and is opposed to this. Hole of movable member (8) (

A permanent magnet (103) is fixed to the bottom wall of 9) in an embedded manner. The lower surface of the sensor (102) is located slightly inward (upper) than the force that is flush with the lower surface of the support member (6). The upper surface of the permanent magnet (103) is located slightly inward (downward) from the force that is flush with the bottom wall surface of the hole (9) of the movable member (8). In a state where the movable member (8) is switched to the rear end position, the sensor (102) is opposed to the center part in the front-rear direction of the permanent magnet (103), and the movable member (8) is switched to the front end position. In the state, the sensor (102) is detached backward from the permanent magnet (103). Therefore, the output of the sensor (102) varies depending on the position of the movable member (8), and the position of the movable member (8), that is, the ink transfer roller (15), is determined by the output of the sensor (102). Recognize. [0050] As will be described later, the ink transferred from the ink fountain (1) to the outer peripheral surface of the original roller (3) is transferred to the ink transfer roller while the ink transfer port roller (15) is switched to the front end position. The ink transferred to (15) and transferred to each ink transfer roller (15) is transferred to the kneading roller (4) while the ink transfer roller (15) is switched to the rear end position. The ink transferred to the kneading roller (4) is supplied to the printing surface through a plurality of ink kneading rollers. Then, the amount of ink supplied to the printing surface depends on the position in the width direction by controlling the time during which the controller (34) is switched to the front end position and the rear end position for each ink transfer roller (15). It is adjusted. The output of the sensor (102) detects whether the ink transfer roller (15) has been switched correctly. If the ink transfer roller (15) does not switch normally, an alarm is issued. Be emitted.

FIG. 5 is an enlarged view of a part of FIG. 1, and FIGS. 6 to 10 are diagrams showing in detail each part of the ink supply device.

[0052] The ink fountain member (2) has, for example, a triangular prism shape having a regular triangular cross section, and cylindrical support shaft portions (35) provided at both left and right ends thereof are rotatably supported by the frame (7). The The frame (7) is provided with an ink fountain member rotating device (36) equipped with an electric motor, and the rotating device (36) rotates the ink fountain member (2) every 120 degrees. It is positioned at the three work positions and is fixed at each work position.

[0053] The three side surfaces around the ink fountain member (2) are ink fountain forming surfaces (37a), (37b), and (37c), and each ink fountain forming surface (37a) to (37c) is rotated counterclockwise. The ridge line at the end in the direction becomes the ink passage forming portions (38a) (38b) (38c) corresponding to the ink fountain forming surfaces (37a) to (37c). The ink fountain forming surface is generically designated by reference numeral (37), and when it is necessary to distinguish, the first ink fountain forming surface (37a), the second ink fountain forming surface (37b), 3 Called ink fountain forming surface (37c). The ink passage forming portions are also collectively referred to by reference numeral (38), and when it is necessary to distinguish them, the first ink passage forming portion (38a), the second ink passage forming portion (38b), the third ink passage forming portion are sequentially arranged in the counterclockwise direction. This is called the ink path forming part (38c). On the end face of the ink fountain member (2), numbers “1” to “3” representing the number corresponding to each ink passage forming part (38) are marked! /

[0054] In the vicinity of the ink fountain member (2), a sheet moving device (40) for feeding and scooping the belt-like sheet (39) is provided. The sheet moving device (40) includes a feeding shaft (41), a take-up shaft (42), and a shaft driving device (43) that drives these shafts (41) (42). The shaft driving device (43) includes an electric motor ( ₄₄ ) for driving the feeding shaft (41) and a power transmission mechanism (45) for transmitting the rotation of the motor ( ₄₄ ) to the scraping shaft (42). The feeding shaft (41) rotates at a constant speed smaller than the scraping shaft (42). Further, the power transmission mechanism (45) is provided with a sliding mechanism (47) that provides frictional resistance and allows sliding. For example, the power transmission mechanism (45) is a gear train, and the sliding mechanism (47) is a second gear that meshes with a gear on the motor (44) side and a gear on the scraping shaft (42) side. These gears are combined with each other so as to rotate while sliding with each other with a predetermined frictional resistance.

[0056] A core cylinder (48) of a sheet roll (49) in which a belt-like sheet (39) made of plastics or the like is wound around a core cylinder (48) made of an aluminum alloy or the like is a feeding shaft. (41) is detachably fixed. The cylindrical scraping member (50) is detachably fixed to the scraping shaft (42). Although not shown in the figure, a scraping cylinder made of plastics or the like is fitted on the outer periphery of the scraping member (50) so as not to rotate with each other.

[0057] The sheet roll (49) fixed to the feeding shaft (41) (49) is also fed (39) force After being applied to the ink fountain member (2) so as to cover the ink fountain forming surface (37), it is removed Guided to the scissor tube fitted to the member (50), the leading end of the sheet (39) is fixed to the scissor tube by appropriate means.

[0058] Even when the outer diameter of the sheet (39) wound around the scraping member (50) is the smallest, the sheet in the portion of the scraping member (50) when it is assumed that there is no slip by the slip mechanism (47) The rotation speed of the feeding shaft (41) and the take-up shaft (42) so that the movement speed of (39) is greater than the movement speed of the sheet (39) in the portion of the sheet roll (49) of the feeding shaft (41). The relationship is determined.

[0059] By driving the feeding shaft (41) and the scooping shaft (42) by the motor (44), the sheet (39) is fed by a sheet roll (49), and the ink fountain member is moved in the length direction thereof. It moves along (2) and is taken up by the scraping member (50). The relationship between the rotation speed of the feeding shaft (41) and the scraping shaft (42) is determined as described above, and a sliding mechanism (47) is provided between the motor (44) and the scraping shaft (42). As a result, the sheet (39) is always moved under tension. For this reason, when the motor (44) stops, the partial force in of the sheet (39) covering the ink fountain forming surface (37) is reduced. Adheres closely to the key surface (37).

[0060] Each ink fountain forming surface (37) of the ink fountain member (2) forms an ink fountain (1) when the ink fountain member (2) is positioned at the corresponding working position. Actually, the ink fountain (1) is formed by the portion of the sheet (39) covering the ink fountain forming surface (37) and the outer peripheral surface of the original roller (3). Then, the ink passage forming portion (38) corresponding to the ink fountain forming surface (37) comes close to the outer peripheral surface of the original roller (3) through the sheet (39) and is in close contact with the ink passage forming portion (38). Thus, an ink passage (52) is formed between the portion of the sheet (39) and the outer peripheral surface of the original roller (3).

[0061] The size of the ink path (52) is determined by the distance between the rotation center axis of the original roller (3) and the rotation axis of the ink fountain member (2), the diameter of the original roller (3), and the ink fountain member. It is determined by the distance from the rotation center axis of (2) to the ink passage formation part (38). In this example, the distance from the rotation center axis of the ink fountain member (2) to the ink passage forming portion (38) is changed for the three ink passage forming portions (38). For this reason, the size of the ink passage varies depending on the work position.

[0062] Between the ink fountain member (2) and the original roller (3), a pair of left and right weir plates (53) forming the side wall of the ink fountain (1) are detachably fixed. . The weir plate (53) has a substantially triangular shape, and the outer periphery of the flat ink fountain adsorbing surface (53a) and the original roller (3) that are in close contact with the ink fountain forming surface (37) at the part corresponding to the two sides of the triangle. A concave partial cylindrical surface-like ink priming roller adsorbing surface (53b) that is in close contact with the surface is formed. In the vicinity of the two attracting surfaces (53a) and (53b) of each weir plate (53), a permanent magnet (54) for adsorption is fixed in an embedded manner.

[0063] In the outer peripheral part of the original roller (3), there are provided a weir plate adsorbing part (55) made of a magnetic material at two locations near the left and right ends, and the parts other than the adsorbing part (55) are non-magnetic. Made of material. The width of the adsorbing part (55) is almost equal to the width of the weir plate (53). Each ink fountain forming surface (37) of the ink fountain member (2) may be entirely made of a magnetic material, or only the portion corresponding to the suction portion (55) of the original roller (3) is a magnetic material. The remaining portion may be made of a nonmagnetic material.

[0064] In the dam plate (53), the original roller adsorption surface (53b) is in close contact with the adsorption portion (55) of the original roller (3) and is adsorbed by magnetic force, and the ink fountain adsorption surface (53a) Is in close contact with the ink fountain-forming surface (37) through the sheet (39) and is attracted to the ink fountain by magnetic force, thereby being fixed to these and forming the side wall of the ink fountain. Since the weir plate (53) is only attracted to the original roller (3) by the magnetic force, it does not hinder the rotation of the original roller (3). [0065] An ink collection tank (56) is arranged in front of the lower part of the original roller (3). An ink wiping blade (57) that protrudes obliquely upward and rearward from the upper end of the rear wall of the tank (56) is fixed to the rear part of the tank (56). The left / right width of the tank (56) and the blade (57) is larger than the left / right length of the original roller (3). After the tank (56) and the blade (57) are moved in the front-rear direction by a blade position switching device (58) equipped with an air cylinder, the upper end of the blade (57) is pressed against the outer peripheral surface of the original roller (3). The position is switched between the end scraping position and the standby position at the front end where the blade (57) moves away from the original roller (3).

[0066] A horizontal plate-like support base (59) that is long in the front-rear direction is provided on the upper right side of the frame (7), and a new weir plate (53) before use is placed on the upper surface of the support base (59). A first dam plate mounting table (60) and a second dam plate mounting table (61) on which the used dam plate (53) is mounted. Each base (60X61) is provided with a convex part cylindrical surface-shaped first receiving part (62) that receives the ink fountain roller suction surface (53b) of the weir plate (53) and a lower part of the first receiving part (62). A second receiving portion (63) is provided that protrudes and receives the ink fountain suction surface (53b) side portion of the ink fountain suction surface (53a) of the weir plate (53). A bar-like magnetic member (64) is fixed in an embedded manner on the upper part of the first receiving part (62).

[0067] A container storage section (66) for storing a plurality of ink containers (65) is provided at the rear of the frame (7).

[0068] The ink container (65) includes a container body (67) made of flexible plastics. The container main body (67) has a circular horizontal cross section and a bellows shape that can be compressed in the vertical direction. The upper wall and the lower wall of the bellows-like portion of the container body (67) form a horizontal disk shape. A circular hole (68) is formed in the lower wall of the container body (67), and a cylindrical part (69) protruding downward from the peripheral edge of the hole (68) is formed in the body. A male screw is formed on the outer periphery of the cylindrical portion (69), and a short cylindrical bottom lid (70) is screwed into the portion from below and fixed. A circular hole (71) is formed in the bottom wall of the bottom lid (70). In addition, a thin disc-shaped bottom plate (72) made of plastics having a large elastic modulus is fitted into the bottom lid (70), and the outer peripheral edge of the bottom plate (72) is connected to the bottom wall of the bottom lid (70). The container body (67) is clamped between the lower end surface of the cylindrical portion (69). The portion of the bottom plate (72) facing the hole (71) of the bottom lid (70) constitutes the bottom wall of the container (65). The thickness of the bottom plate (72) becomes thinner toward the center side, and a cut (73) is formed in the bottom plate (72). In this example, there are six straight cuts (73) that the center force of the base plate (72) also extends radially. As a result, six triangular tongues (111) are formed. Further, a short cylindrical block portion (74) is formed on the inner surface (lower surface) of the upper wall of the container body (67). The outer diameter of the block portion (74) is slightly smaller than the inner diameter of the tube portion (69), and the length (height) of the block portion (74) is slightly smaller than the length of the tube portion (69).

[0069] Normally, each container (65) contains different types of ink. When no pressure is applied to the upper part of the container (65), the cut (73) is closed, and the ink does not come out from this part. As will be described later, when the top of the container (65) is pushed downward while the bottom of the container (65) is fixed, the pressure causes the six tongues as shown by the chain lines in FIGS. (111) is elastically deformed downward, the notch (73) is opened, and the container (65) is opened through the opening and the notch (73).

[0070] The container storage section (66) includes a support member (75) extending horizontally in the left-right direction. The right end portion of the support member (75) is supported by the rear end portion of the support base (59) via an elevating device (76) using an air cylinder. On the support member (75), a plurality of container holding devices (77) are provided in parallel in the left-right direction. Each container holding device (77) includes a bottom receiving part (78) that receives a lower force at the bottom of the container (65) and a substantially semicircular intermediate that holds the intermediate part of the container (65) with a rear force. Part holding part (79).

[0071] A guide rail (80) extending horizontally in the front-rear direction is provided on the right side of the dam plate mounting table (60X61) on the upper surface of the support table (59), and the first movable body (81 ) Is guided by the guide rail (80). A roller (82) provided at the lower left portion of the moving body (81) is placed on the upper surface of the left portion of the frame (7). Although not shown, the moving body (81) is moved in the front-rear direction by a driving device using a ball screw or the like.

[0072] A guide rail (83) extending horizontally in the left-right direction is provided on the upper rear surface of the first moving body (81), and the second moving body (84) is guided by the guide rail (83). . Although not shown, the moving body (84) is moved in the left-right direction by a driving device using a ball screw or the like.

[0073] The main part of the weir plate changing device (85) and the ink supply device (86) are provided in the second moving body (84).

[0074] The weir plate exchanging device (85) is configured as follows.

[0075] A position close to the top of the original roller (3), the original roller (3) and the ink fountain forming surface (37) A cover (110) that also serves as a barrier plate regulating member is provided at a position slightly behind the rear end of the barrier plate (53) adsorbed on the barrier plate. The left and right ends of the cover (110) are fixed to the frame (7) and cover the entire upper part of the original roller (3).

[0076] A horizontal plate-like third moving body (88) is supported on the rear surface of the second moving body (84) via an elevating device (87) using an air cylinder, and the moving body (88 ) Is provided with a turning and opening / closing device (89) using air pressure. A pair of freely openable and closable weir plate holding members (91) are provided at the lower end of the vertical swing shaft (90) from which the swinging / opening / closing device (89) projects downward. The holding member (91) is moved in the front-rear direction and the left-right direction by movement of the first and second moving bodies (81X84), and is moved up and down by raising and lowering the third moving body (88). The holding member (91) is turned about the vertical axis by turning the turning shaft (90) by the turning / opening / closing device (89), and is opened / closed by the turning / opening / closing device (89).

[0077] The ink supply device (86) is configured as follows.

A guide rail (92) extending horizontally in the left-right direction is provided on the rear surface of the second moving body (84), and a pair of left and right container holding members (93) are guided by the guide rail (92). Yes. The two holding members (93) are symmetrical with each other. The holding member (93) includes a bottom holding portion (94) that sandwiches the bottom lid (70) portion of the container (65) from both the left and right sides and supports the outer periphery of the bottom surface of the bottom lid (70) with a lower force, and a container ( An intermediate portion holding portion (95) for holding the intermediate portion of 65) from both the left and right sides is provided. Although not shown in the figure, the holding member (93) is moved left and right symmetrically by a drive device using an air cylinder to open and close. The vertical lifting rod (97) is supported by the bracket (96) that extends upward above the holding member (93) and can be moved up and down as well as the upper force of the second moving body (84). It is raised and lowered by a lifting device (98). A horizontal disk-shaped pressing member (99) is fixed to the lower end of the lifting rod (97) protruding downward from the bracket (96). The level sensor (1) detects the ink level in the ink fountain (1) at the tip of the bracket (100) fixed to the bottom of the bottom holding part (94) of one holding member (93). 101). As the level sensor (101), for example, an ultrasonic sensor is used.

[0079] When the container (65) is held by the holding member (93), the notch (73) of the container (65) is cut in a state where the pressing member (99) does not push the upper portion of the container (65) downward. ) Is closed, Nki never goes outside. When the pressing member (99) pushes the upper part of the container (65) downward, the pressure causes the notch (73) to open and the ink falls downward. The ink falls on the outer peripheral surface of the original roller (3) slightly above the ink passage (52). The ink dropped on the outer peripheral surface of the original roller (3) moves to the ink passage (52) by the rotation of the original roller (3), and accumulates in the ink fountain (1).

[0080] While the ink replenishing device (86) reciprocates left and right at a predetermined speed, the level sensor (101) detects the ink level in the ink fountain (1), and the ink level becomes lower than the predetermined value. Refill the ink fountain (1) with ink. As a result, the ink level in the ink fountain (1) can be kept substantially constant.

[0081] Before printing, the dam plate (53) was not attached to the original roller (3) and the ink fountain forming surface (37), and a new dam plate was placed on the first dam plate mounting table (60). There are two or more (53). The ink supply device (86) does not hold the container (65), and the container (65) is held by the container holding device (77). Then, the sheet roll (49) force is also fed out and the intermediate part of the sheet (39) wound around the scooping member (50) is used at a predetermined working position of the ink fountain member (2). It is in close contact with the ink fountain forming surface (37). In this case, the ink fountain member (2) is positioned at the first working position, and the sheet (39) is in close contact with the first ink fountain forming surface (37a).

From such a state, first, the dam plate holding device (91) of the dam plate changing device (85) holds one dam plate (53) on the first mounting table (60). Is adsorbed to one weir plate adsorption part (55) of the original roller (3) and the ink fountain forming surface (37a) corresponding to this, and then another damp plate (53) is similarly attached to the original roller (53 It is adsorbed to the other weir plate adsorbing part (55) of 3) and the ink fountain forming surface (37a) corresponding thereto.

[0083] Next, the ink replenishing device (86) moves to the front of the desired container holding device (77) of the container storage section (66), then moves to the rear, and from the container holding device (77). Hold the ink container (65). When the ink replenishing device (86) moves backward toward the container holding device (77), the pair of container holding members (93) opens, and the pressing member (99) rises to the upper end position. As shown in FIG. 8 (b), the support member (75) of the container storage section (66), that is, the container holding device (77) is raised to the upper end position. The ink supply device (86) has a container (65) with a pair of container holding members (93). The container stops at the intermediate position, and the container holding member (93) closes. Figure 8 (b) shows such a state. From this state, the container holding device (77) is lowered to the lower end position, whereby the container (65) is held by the container holding member (93) as shown in FIG. 8 (a).

[0084] If the container (65) is held by the container holding member (93), the ink supply device (86) also moves forward above the ink fountain (1) with the container holding device (77) force also moving away. Then, while only the original roller (3) is rotated and all the ink transfer rollers (15) are switched to the rear end position, the ink replenishing device (86) is moved back and forth back and forth while moving the ink fountain to a certain level. Supply ink in (1). At this time, the ink level in the ink fountain (1) is lowered so that a small amount of ink is collected only in a small part near the ink passage (52).

[0085] When a certain amount of ink has accumulated in the ink fountain (1), the kneading roller (4) and other rollers are also rotated to control the switching of the position of the ink transfer roller (15). Ink is supplied to the printing surface and printing is performed.

[0086] During printing, ink is supplied into the ink fountain (1) while moving the ink supply device (86) to the left and right, thereby maintaining the ink level in the ink fountain (1) almost constant. Thus, a small amount of ink should be collected only in a small part near the ink passage (52). In addition, when an abnormality in the switching of the position of the ink transfer roller (15) is detected by the output of the position switching detection sensor (102), an alarm is issued and the operation is stopped.

[0087] When printing is completed and printing is performed using a different ink, the setup change operation is performed as follows, for example.

[0088] When printing is completed, first, the ink replenishing device (86) moves to the front of the original container holding device (77) of the container storage section (66) and then moves to the rear, and the container holding device. Return the ink container (65) to (77). The ink supply device (86) stops at a position where the held container (65) is located directly above the bottom receiving portion (78) of the original container holding device (77). Figure 8 (a) shows such a situation. At this time, the container holding device (77) is stopped at the lower end position. When the ink supply device (86) is stopped, the container holding device (77) is raised to the upper end position. As a result, as shown in FIG. 8 (b), the container (65) is lifted by the bottom receiving portion (78) of the container holding device (77), so that the pair of ink holding members (93) is opened and the ink holding member (93) is opened. The replenishing device (86) moves forward and leaves the container holding device (77). [0089] On the other hand, all the ink transfer rollers (15) are switched to the rear end position, separated from the original roller (3), the ink recovery tank (56) is switched to the scooping position, and the blade (57) is returned to the original position. The roller (3) is pressed against the outer peripheral surface, and the original roller (3) is rotated in such a state. As a result, the ink remaining in the ink fountain (1) passes through the ink passage (52) in the same manner as during printing, and comes to the outer peripheral surface of the original roller (3). It is scraped off and collected in the tank (56). If all the ink remaining in the ink fountain (1) is taken out by the original roller (3) and collected in the tank (56) by the blade (5 7), the original roller (3 ) To rotate. As a result, the ink remaining on the outer peripheral surface of the original roller (3) is almost scraped off by the blade (57) .After that, the tank (56) is switched to the standby position and the blade (57) is moved. Move away from the original roller (3) and stop the original roller (3).

[0090] When the original roller (3) is stopped, the ink fountain member (2) is rotated counterclockwise.

When the ink fountain member (2) rotates, the ink fountain member (2) is pushed by the ink fountain forming surface adsorbing portion (53a) of the dam plate (53), and is separated from the force fountain forming surface (37a). It rotates counterclockwise with the original roller (3) while adsorbed to the original roller (3), but immediately hits the cover (110) and is stopped. Further, when the ink fountain member (2) further rotates, the barrier plate (53) rotates around the contact portion with the cover (110), and the ink original roller adsorbing portion (53b) becomes the original roller. Detach from the outer peripheral surface of (3). The ink fountain member (2) comes off from both the weir plate (53) force ink fountain member (2) and the original roller (3) and stops. When the ink fountain member (2) stops, the dam plate holding member (91) of the dam plate changer (85) holds the dam plate (53) in the opposite direction, and the ink fountain member (2) and the original roller ( After removing from 3) and moving to the second mounting table (61), similarly remove the other weir plate (53) and transfer to the second mounting table (61).

[0091] The ink transferred to the ink transfer roller (15) is transferred to the kneading roller (4) and other rollers by the rotation of the kneading roller (4), and these rollers (15) (4) Less ink remains on the outer surface. The ink transfer roller (15), the kneading roller (4) and other rollers are automatically cleaned as before. At this time, if necessary, for example, by switching the position of the ink transfer roller (15) in one of the states shown in FIG. 11, the cleaning liquid for automatic cleaning is transferred from the kneading roller (4) side to the original roller (3 The outer peripheral surface of the original roller (3) can be automatically washed. [0092] If the two weir plates (53) are removed from between the ink fountain member (2) and the original roller (3), the sheet roll (49) force is reduced to a predetermined length by the sheet moving device (40). The sheet (39) is unwound and wound on the scraping member (50). Then, the ink fountain member (2) is positioned at the working position for the next printing and stopped. As a result, the partial force of the used sheet (39) that adheres to the ink fountain forming surface (37a) and has old ink adhered during printing is moved to a position where the force of the ink fountain forming surface (37) is also removed. Then, it comes in close contact with the partial ink fountain forming surface (37) of the new sheet (39) before use.

Thereafter, the next printing is performed in the same manner as described above.

FIG. 12 shows a modified example of the ink fountain member.

In this case, the ink fountain member (104) has, for example, a quadrangular prism shape with a square cross section, is positioned at four work positions at 90 degrees, and is fixed at each work position. The four sides around the ink fountain member (104) are the ink fountain forming surfaces (105a) (105b) (105c) (105d), and each ink forming surface (105a) to (105d) is counterclockwise. The ridge line at the end of each ink becomes the ink passage forming portions (106a) (106b) (106c) (106d) corresponding to the ink forming surfaces (105a) to (; 105d).

Others are the same as those in the above-described embodiment, and the same portions are denoted by the same reference numerals. [0097] FIG. 13 shows another modification of the ink fountain member.

[0098] In this case, the ink fountain member (107) has, for example, a triangular prism shape with a right-angled cross section, and is positioned and fixed only at one working position. Sink fountain forming surface (108), rear ridge force of ink fountain member (107) Sink fountain forming surface (108) It has become. Further, when the barrier plate (53) is replaced, the ink fountain member (107) is also rotated in the counterclockwise direction by the working position force, and is returned to the working position after the barrier plate (53) is removed in the same manner as described above. It has become like that.

Others are the same as those in the above-described embodiment, and the same parts are denoted by the same reference numerals.

14 and 15 show a modification of the ink container (65).

[0101] In this case, three straight cuts (112) are formed in the bottom plate (72) of the container (65) so as to form a U-shape, leaving one side of the rectangle. Tongue (113) is formed Yes. Then, when the top of the container (65) is pushed downward with the bottom of the container (65) fixed, the pressure causes one tongue-like part (113) as shown by the chain line in FIG. 14 and FIG. Elastically deforms downward, and the part of the notch (112) opens.

[0102] Others are the same as those in the above embodiment, and the same portions are denoted by the same reference numerals.

16 and 17 show another modification of the ink container (65).

[0104] In this case, five straight cuts (114) are formed in the bottom plate (72) of the container (65) so as to form an H shape, and two rectangular tongues (115) are formed. Is formed. Then, when the upper part of the container (65) is pushed downward with the bottom of the container (65) being fixed, the two tongues (115) are pressed by the pressure, as shown by the chain lines in FIGS. Is elastically deformed downward and the notch (114) is opened.

Others are the same as those in the above embodiment, and the same parts are denoted by the same reference numerals.

[0106] The overall configuration of the ink supply device of the printing press and the configuration of each unit are not limited to those of the above-described embodiment, and can be changed as appropriate.

Industrial applicability

The present invention is suitable for use in an ink container used in a printing machine. By using the ink container of this invention, it becomes possible to automate the replenishment of ink to the ink fountain, further automating the setup change work, thereby simplifying the setup change work and shortening the work time.

Claims

The scope of the claims

[1] It has a bellows shape that can be compressed in the vertical direction, and a notch that is normally closed is formed in the bottom wall. When the bottom is held and the top is pushed downward, the notch is opened by pressure. The ink container is characterized in that the ink inside is opened and falls down through the notch! /.

2. The ink container according to claim 1, wherein a plurality of linear cuts are formed on the bottom wall to form at least one polygonal tongue.

[3] The ink container according to [2], wherein the plurality of cuts are formed radially to form a plurality of triangular tongues.

[4] The ink container according to claim 2, wherein the incision is U-shaped, and one rectangular tongue is formed.

5. The ink container according to claim 2, wherein the notch is H-shaped and two rectangular tongues are formed.

[6] A cylindrical portion having an outer diameter smaller than that of the container body is formed in a downward projecting shape and integrally with a peripheral portion of the hole formed in the bottom wall of the bellows-shaped container body, and the hole is formed in the cylindrical portion. The formed bottom cover is fixed to the bottom cover so that it can be detachably attached. 6. The ink container according to any one of claims 1 to 5, wherein a cut is formed in a portion of the bottom plate that is stopped and faces the hole of the bottom cover and forms a bottom wall.