WO2013029700A1 - Printing press and printing-press cylinder supporting device - Google Patents

Abstract

A printing press (1) comprises a cylinder (3) with a cylinder axle (5) and a cylinder channel (4). The cylinder axle (5) is supported on a first roller (11.1) and a second roller (12.1). The first roller (11.1) and the second roller (12.1) are loaded by a spring (18).

Description

 The present invention relates to a printing press comprising a cylinder having a cylinder axis and a cylinder channel, according to the preamble of claim 1, and a DmckmascWnenzylmder-support device according to the preamble of

Claim 10. Such a cylinder channel acts in many cases as a tensioning channel for receiving the ends of a spanned on the cylinder elevator. The elevator can be a pressure plate or a blanket.

When rolling the cylinder on an adjacent cylinder causes the cylinder channel a so-called channel blow. If the cylinder channel is in opposition to the adjacent cylinder, the pressure between the two cylinders abruptly drops. This happens with each cylinder revolution and leads to visible disturbances in the printed image. Various countermeasures have been proposed, but they are not practical in all cases.

In DE 196 10 466 C2, the adjacent cylinder is formed by a roller. The roller is mounted in a storage, by which an excited by the channel passage jumping the roller is avoided.

In DE 38 14 020 AI of the cylinder channel having cylinder by a

Blanket cylinder formed, which is equipped with a radial increase. This increase ensures the required cylinder pressure during the passage of the duct.

The known countermeasures are unsuitable for retrofitting. Therefore, the invention has the object to provide a printing machine with a suitable for retrofitting anti-channel impact training.

This object is achieved by a printing machine with the features of claim 1 and a printing machine cylinder support device with the features of claim 10.

The printing machine according to the invention, comprising a cylinder with a cylinder axis and with a cylinder channel, is characterized in that the cylinder axis is supported on a first roller and a second roller, and that the first roller and the second roller are loaded by a spring. So it is not the peripheral surface of the cylinder in contact with the rollers. Rather, the rollers contact the cylinder axis, which can also be referred to as a journal. The spring or springs may be flexural springs (eg disc springs), compression springs or gas springs or be formed by pneumatic cylinders or hydropneumatic cylinders.

The cylinder channel can, for. B. if this is a clamping channel, be introduced into a cylindrical bale or basic body of the cylinder, so that the cylinder barrel has an open peripheral surface in the region of the cylinder channel. In the present description under the cylinder channel also a gap (so-called gap) between a leading edge and a trailing edge of a loop wrapped around the cylindrical bale, z. B. an adhesive on the cylinder bales or magnetically held on flexographic printing plate (cliché) understood. The cylindrical bale itself in this case need not have a cylinder channel and can therefore have a completely enclosed peripheral surface.

An advantage of the invention is that the rollers and the spring components of a

Can be additional device that can be used as needed in the printing press. The attachment can be used in retrofits and certain print jobs in the printing press. The insertion of the attachment requires no structural changes to the printing press and can be made by the operator himself. There are various developments possible.

In a further development, the first roller and the second roller are mounted in one and the same carrier. This common carrier of the first and second rollers may be integrally formed. The two rollers can be opposite to each other

be stored longitudinal ends of the common carrier in this.

In addition, the first roller and the second roller may be mounted in the common carrier such that a geometric axis of rotation of the first roller and a

geometric axis of rotation of the second roller are parallel to each other.

In a preferred embodiment, the first roller and the second roller are loaded by one and the same spring. This common spring transmits its power to parts on the first roll and at the same time on the second roll. Of course, several such common springs may be present, each of which transmits its power partly to the first roller and partly to the second roller. These springs can be connected in parallel with each other or connected in series with each other, for. B. in a design of the Fedem in the form of a plate spring package. Less preferred is a development in which no common spring is present and wherein a first spring only the first role (ie: not the second role) charged or multiple first springs only load the first role and wherein a second spring only the second role ( ie: not the first roller) or several second springs only load the second roller. According to a further development, the cylinder axis is a rotating axis (eg a shaft), ie no fixed axis. During printing operation, the cylinder axis rotates and continuously rolls the first roller and the second roller on the cylinder axis, which frictionally drives the two rollers. The cylinder axis may be formed as a journal, which is attached or integrally attached to the cylindrical body of the cylinder. In a further embodiment, the spring is oriented such that the spring force of the spring or at least a component of the spring force radially loaded the common carrier with respect to the cylinder and the cylinder axis to press both the peripheral surface of the first roller against the peripheral surface of the cylinder axis and the

To press peripheral surface of the second roller against the peripheral surface of the cylinder axis. The first roll and the second roll are in this case along the circumference of the

Cylinder axis mutually offset circumferential locations pressed to the cylinder axis.

As a result of the pressure applied by the spring on the common carrier contact pressure of the first and second rollers to the cylinder axis roll the two rollers on the

Cylinder axis when the latter rotates during machine or printing operation. If there are several springs, then the common carrier is through the

Resulting from the spring forces of the springs or by a component of the

Resultantly with respect to the cylinder axis radially loaded, such that thereby the rollers mounted in the common carrier are pressed against the cylinder axis.

In a further development, the first roller and the second roller are not stored in a common carrier, but the first roller is mounted in a first carrier and the second roller is mounted in a second carrier. The two carriers can each be integrally formed and connected to each other via one or more components or intermediate elements.

In a further development pulls or pushes the spring or pull or push the springs, the two carriers towards each other, so that consequently the first roller and the second roller are pressed against the cylinder axis. In this variant too, the first roller and the second roller are simultaneously pressed against the cylinder axis by two circumferential shafts which offset one another along the circumference of the cylinder axis. As the carriers move, they move with the rollers stored therein

towards each other, wherein a component of movement of the respective roller movement with respect to the cylinder axis is directed radially, whereby the respective roller is pressed under the spring force action against the cylinder axis. In a further development, the first carrier and the second carrier are connected to each other via a sliding joint or a linear guide. This linear guide guides the two carriers in their successive adjustment. The linear guide can be used as a screw, z. As a shaft screw, or as a bolt, z. B. a

Threaded bolt, be formed in combination with an introduced in one of the carrier bore for guiding the screw or the bolt.

In an alternative development, the carriers are connected to one another via a knee joint.

In a further development, a third roller is mounted in the first carrier except the first roller, wherein the first roller and the third roller are arranged parallel to each other with respect to their geometric axis of rotation, and in the second carrier except the second roller a fourth roller is mounted, wherein the second roller and the fourth roller with respect to their geometric axis of rotation are arranged parallel to each other. The first roller may be located at one longitudinal end of the first carrier and the third roller at the other longitudinal end of the first carrier, and analogously, the second roller and the fourth roller may be at the two

be arranged opposite ends of the second carrier. Thus, each of the two carriers is equipped with at least two rollers.

In a further development, the third roller and the fourth roller are pressed by the two carriers loading spring or loading springs against the roll axis of a roller. In the roll axis is a rotating axis, which may be attached or formed as a journal on a bale of the roller. During the machine run, the third roller and the fourth roller roll on the

Peripheral surface of the roll axis from, wherein the rotation of the third roller and the fourth roller is driven by the roller shaft via friction. The roller may be a Farbwerkswalze, z. B. an anilox roller or anilox roller, or be rolling on a printing form inking roller and is preferably both at the same time, namely a circumferentially provided with a consisting of wells, grooves or comparable cells grid structure inking roller. In a further development, the first roller and a further first roller with their geometric axes of rotation are aligned with each other, that is, coaxial, arranged and the second roller and another second roller are arranged coaxially with each other. In this development, the other first roller and the other second roller are pressed against the cylinder axis, on which roll the further first roller and the other second roller during machine running by the carrier loading spring or loading springs. Accordingly, the cylinder axis is supported at a circumferential point of the cylinder axis on the two first rollers and at the same time supported at an angular offset, other circumferential point of the cylinder axis on the two second rollers.

Furthermore, the third roller and another third roller may be arranged coaxially with each other, and the fourth roller and another fourth roller may be arranged coaxially with each other, the roller shaft of the roller being supported on the two third rollers and simultaneously on the two fourth rollers. Accordingly, four rollers, which form two pairs of rollers, are arranged on the first carrier and also four rollers, which form two pairs of rollers, are arranged on the second carrier. At the one end of the first carrier is formed by the two first rollers pair of rollers and at the other end of the first carrier is formed by the two third rollers

Roll pair arranged. Analogously, at the one end of the second carrier, a pair of rollers formed by the two second rollers and at the other end of the second carrier a pair of rollers formed by the two fourth rollers are arranged. The two first rollers are rotatably mounted to each other and also the respective two rollers of each of the other pairs of rollers are rotatably mounted to each other. The first carrier may be arranged between the first roller and the third roller on the one carrier side and the further first roller and the further third roller on the other carrier side. For this purpose, the second roller and the fourth roller can be arranged on one side of the second carrier and the further second roller and the further fourth roller can be arranged on the other side of the second carrier. In a further development, which relates to the variant with the common carrier, the common carrier between the first roller and the second roller on the one carrier side and the further first roller and the further second roller may be arranged on the other carrier side.

In a further development, which relates to the variant with the toggle joint, the fourth roller is supported on the roller axis of the impression cylinder. Thus, all three printing cylinder pressure cylinder, impression cylinder and anilox roller braced against each other.

All according to the one variant on the common carrier and according to the other variant on the two interconnected carriers (first carrier and second carrier) arranged rollers may be identical to each other and therefore have the same outer diameter. For example, all of these rollers can be formed by roller bearings whose respective outer rings form the rolling surface of the respective roller rolling on the cylinder axis or the roller axis. The inner rings of the bearings can rotatably connected to the respective carrier and z. B. be screwed to it.

To the cylinder at its two ends, d. h., To support on both sides of the machine - the drive side and the operating side - is the carrier-roller unit in duplicate for the printing press or in there. This applies to both variants of the carrier-roller unit, for the variant with the common carrier and also for the variant with the first carrier and the second carrier. In a cylinder axis extending continuously from the drive side to the operating side, the one carrier-roller unit supports the cylinder axis at one end thereof

Drive side and supports the other carrier-roller unit from the same cylinder axis at the other end on the operating side. In the event that the cylinder axis is not formed continuously from one side of the machine to the other side of the machine and instead is divided into a journal on a cylinder end and another journal on the other cylinder end, supports a support roller unit on the one journal on the Drive side and supports the other carrier-roller unit from the other journals on the operating side. In both cases, that of the continuous cylinder axis or of the divided into two separate journals Cylinder axis supported cylinder bales by the two carrier-roller units effectively before otherwise caused by the channel impact of the cylinder channel

Vibration excitation is protected and will otherwise result

Störstreifenbildung in the printed image prevented. Each of the two carrier-roller units forms an additional device that can be used by the operator, as already explained, as needed in the printing press.

The invention also includes a printing press cylinder support for

Supporting a cylinder of a printing press, the cylinder having a cylinder axis and a cylinder channel, which printing press cylinder support means is characterized by a first roller and a second roller supporting the cylinder axis and a spring loading the first roller and the second roller.

The rollers support the cylinder axis in direct contact with this.

Other constructive and functional advantageous developments of the invention will become apparent from the following description of preferred embodiments and the accompanying drawings. In this shows:

Figure 1 shows a first embodiment in which one as an additional device in the

 Pressing machine used carrier-roller unit has two mutually adjustable carrier, each with two support roller pairs and

Figure 2 shows a second embodiment in which a carrier device used as an additional device in the printing press roller unit comprises only a single carrier having two support roller pairs.

Figure 3 shows a third embodiment in which one as an additional device in

Press used carrier-roller unit acts on arranged in a plane cylinder. In FIGS. 1, 2 and 3, corresponding elements and components are designated by the same reference numerals. In Figures 1 and 2 is shaped printing material in each section, a printing machine 1 for printing on a bahnfb ^'is shown. The Dmckmaschine 1 is a

Fed rotary printing press. The section shows components of a printing unit and an associated anilox inking unit of the printing press 1. The printing unit comprises an impression cylinder 2 and a printing cylinder 3, which together with the

Counter-pressure cylinder 2 forms a nip in which the liquid or pasty color is transferred from the cylinder 3 to the substrate. The cylinder 3 is a

Printing forme cylinder for direct printing and carries a graphically not shown printing plate (cliché) for flexographic printing. The cylinder 3 has a

Cylinder channel 4 and a cylinder axis 5. At the cylinder 3 is located on a roller 6, from which the ink is transferred to the cylinder 3 and the pressure plate located thereon. The roller 6, which is an inking roller and an anilox roller, has a roller shaft 7. A Dmckmaschinenzylinder support device 8 is formed as an auxiliary device, which can temporarily insert the operator of the printing press 1 for certain print jobs in the printing press 1.

The additional device can be a roller carrier unit designed according to FIG. 1 or a roller carrier unit designed according to FIG. 2, for which reason these two exemplary embodiments will be described further separately below. According to FIG. 1, the printing machine cylinder supporting device 8 comprises an adjustable, first carrier 9 and an adjustable, second carrier 10. A first roller 11.1 and a further first roller 11.2 are mounted in the first carrier 9 and supported on the cylinder axis 5. A second roller 12.1 and further second roller 12.2 are mounted in the second carrier 10 and supported on the cylinder axis 5. A third roller 13.1 and a further third roller 13.2 are mounted in the first carrier 10, such that the common geometric axis of rotation of the first rollers 11.1, 11.2 is aligned parallel to the common geometric axis of rotation of the third rollers 13.1, 13.2 and the third rollers 13.1, 13.2 are supported on the roller shaft 7. A fourth roller 14.1 and a further fourth roller 14.2 are mounted in the second carrier 10, such that the common geometric axis of rotation of the second rollers 12.1, 12.2 is aligned parallel to the common geometric axis of rotation of the fourth rollers 14.1, 14.2 and the fourth rollers 14.1 , 14.2 are supported on the roller shaft 7. A straight guide 15 is aligned exactly in the middle between the first roller 11.1 and the third roller 13.1 such that the linear guide 15 in the image plane of Figure 1 and perpendicular relative to a geometric axis of rotation of the cylinder 3 with the geometric axis of rotation of the roller 6 connecting , imaginary connecting line runs. The straight guide 15 consists of a bore 16 in the first carrier 9 and a loosely inserted through the bore 16 and guided therein with its screw shank screw 17. The first carrier 9 is in the region of the shank of the screw 17 along this displaceable. The screw 17 is screwed with its one end in the second carrier 10 and has at its other end a head. A spring 18 is supported under prestress with its one end over the head of the screw 17 on this and supported with its other end on the first support 9. The spring 18 is formed by a disc spring package and strives to pull the two carriers 9, 10 toward each other or to brace. A sum formed from the distance between the geometric axes of rotation of the first roller 11.1 and the third roller 13.1 and from the radius of the first roller 11.1 and the radius of the second roller 12.1 is greater than the minimum distance b between the cylinder axis 5 and the

Rolling axis 7. The minimum distance b is the difference formed by subtracting the radii of the cylinder axis 5 and the roll axis 7 from the distance between the geometric axes of rotation of the cylinder axis 5 and the roll axes 7. Likewise, a sum c formed from the distance between the geometric axes of rotation of the second roller 12.1 and the fourth roller 14.1 and from the radii of these two rollers 12.1, 14.1 is greater than the minimum distance b.

According to FIG. 2, the printing press cylinder support device 8 comprises an adjustable common carrier 19, in which a first roller 11.1 and a second roller 12.1 are mounted. Another first roller 11.2 is mounted coaxially with the first roller 11.1 in the carrier 19 and another second roller 12.2 is coaxial with the second Roll 12.1 stored in the carrier 19. A common geometric axis of rotation of the first rollers 11.1, 11.2 and a common geometric axis of rotation of the second rollers 12.1, 12.2 are also aligned parallel to each other and parallel to a common geometric axis of rotation of the cylinder 3 and the cylinder axis 5. A gas spring 20 forms a carrier 19 together with the rollers 11.1, 11.2, 12.1, 12.2 to the cylinder axis 5 and pressing down the rollers 11.1, 11.2, 12.1, 12.2 against the cylinder axis 5 pressing spring 18 and at the same time a straight guide 15, which by the spring 18 causes adjustment of the carrier 19 leads. A piston rod 21 of the gas spring 20 and thus the straight guide 15 is radially aligned relative to the cylinder 3 and to the cylinder axis 5. The piston rod 21 engages between the first roller 11.1 and the second roller 12.1 in the middle of the carrier 19 at this. By aligning the piston rod 21, the spring force line of action of the spring 18 is specified. The spring 18 is supported with its support 19 opposite end on a frame 22 of the printing machine 1.

According to Figure 3, the Dmckmascm ^ enzylinder support device 8 comprises two carriers 9, 10, which are connected to each other via a toggle joint 24.

Via a pneumatic cylinder or hydropneumatic cylinder 23, which has the action of a spring 18, 20, a force is transmitted from the machine frame 22 to the toggle joint 24. The first carrier 9 and the second carrier 10 are connected to the hinge 24, wherein the first carrier 9 has a first roller 11.1 (and optionally further first roller 1 1.2) and the second carrier 10 a second roller 12.1 (and possibly further second Roller 12.2) has, which are employed in each case against the cylinder axis 5 of the cylinder 3.

At its end, the first carrier 9 has a third roller 13.1, which is pressed against the roller shaft 7 of the roller 6 with a bracing force.

At its end, the second carrier 10 has a fourth roller 14.1, which is pressed with a clamping force against the roller axis 25 of the impression cylinder 2. This gives the three axes 5, 7, 25 to each other, as well as to the frame 22 a force-transmitting connection. Also, the bearing clearance of the axle bearings 5, 7, 25 are canceled by the bias. Due to the Hubbeweglichkeit of the cylinder 23, the device 8 is flexible. Thus, the device 8 can be adapted to different sized cylinders 2, 3, 6 and consequently differently spaced cylinders 2, 3, 6. Also, the pressure delivery, ie the biasing force can be changed, for example, during startup of the printing unit to the full production speed.

LIST OF REFERENCE NUMBERS

1 printing press

 2 impression cylinders

 3 cylinders

 4 cylinder channel

 5 cylinder axis

 6 roller

 7 roll axis

 8 Dmckmaschinenzylinder-supporting device

9 first carrier

 10 second carrier

 11.1 first role

 11.2 (further) first role

 12.1 second roll

 12.2 (further) second role

 13.1 third role

 13.2 (further) third role

 14.1 fourth role

 14.2 (further) fourth role

 15 straight guide

 16 hole

 17 screw

 18 spring

 19 common carrier

 20 gas spring

 21 piston rod

 22 frame

 23 pneumatic cylinders

 24 toggle joint

 25 axis counter-pressure cylinder

a total b minimum distance c sum

Claims

Printing machine (1), comprising a cylinder (3) with a cylinder axis (5) and with a cylinder channel (4), characterized by this, that the cylinder axis (5) is supported on a first roller (11.1) and a second roller (12.1), and that the first roller (11.1) and the second roller (12.1) are loaded by a spring (18). Printing machine according to claim 1, characterized, that the first role (11.1) and the second role (12.1) are mounted in a common carrier (19). Printing machine according to claim 2, characterized, that the common carrier (19) is radially loaded by the spring (18) with respect to the cylinder axis (5), so that the first roller (11.1) and the second roller (12.1) are pressed against the cylinder axis (5). Printing machine according to claim 1, characterized, that the first role (11.1) is mounted in a first carrier (9) and the second role (12.1) in a second carrier (10). Printing machine according to claim 4, characterized, that the first carrier (9) and the second carrier (10) are clamped together by the spring (18), so that the first roller (11.1) and the second roller (12.1) against the cylinder axis (5) can be pressed. 6. Printing machine according to claim 4, characterized by this, that the first carrier (9) and the second carrier (10) are connected to one another via a straight guide (15). 7. Printing machine according to claim 4, characterized by this, that the first carrier (9) and the second carrier (10) are connected to one another via a toggle joint (24). 8. Printing machine according to claim 4 or 7, characterized by this, that a third roller (13.1) is mounted in the first carrier (9) and a fourth roller (14.1) is mounted in the second carrier (10). 9. Printing machine according to claim 8, thereby indicating that the third roller (13.1) and the fourth roller (14.1) are supported on a roller axis (7) of a roller (6). 10. Printing machine according to claims 4, 7 and 8, characterized by this, that the fourth roller (14.1) is supported on a roller axis (25) of an impression cylinder (2). 11. Printing machine according to claim 1, characterized by this, that the first roller (11.1) and a further first roller (11.2) are arranged coaxially with one another, that the second roller (12.1) and a further second roller (12.2) are arranged coaxially with one another, and that the cylinder axis (5) is supported on the further first roller (11.2) and the further second roller (12.2). Printing machine cylinder support device (8) for supporting a cylinder (3) of a printing press (1), the cylinder (3) having a cylinder axis (5) and a cylinder channel (4), marked by, a first roller (11.1) and a second roller (12.1) for supporting the cylinder axis (5) and a spring (18) for loading the first roller (11.1) and the second roller (12.1).