EP2040927B1 - Clamping device comprising a tiltable clamping piece - Google Patents

Clamping device comprising a tiltable clamping piece Download PDF

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Publication number
EP2040927B1
EP2040927B1 EP07786026A EP07786026A EP2040927B1 EP 2040927 B1 EP2040927 B1 EP 2040927B1 EP 07786026 A EP07786026 A EP 07786026A EP 07786026 A EP07786026 A EP 07786026A EP 2040927 B1 EP2040927 B1 EP 2040927B1
Authority
EP
European Patent Office
Prior art keywords
clamping
clamping piece
channel
piece
bearing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07786026A
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German (de)
French (fr)
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EP2040927A1 (en
Inventor
Andreas Zahnd
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wifag Maschinenfabrik AG
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Wifag Maschinenfabrik AG
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Application filed by Wifag Maschinenfabrik AG filed Critical Wifag Maschinenfabrik AG
Publication of EP2040927A1 publication Critical patent/EP2040927A1/en
Application granted granted Critical
Publication of EP2040927B1 publication Critical patent/EP2040927B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F27/00Devices for attaching printing elements or formes to supports
    • B41F27/12Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1262Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means
    • B41F27/1268Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means by self-locking or snap-on means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F27/00Devices for attaching printing elements or formes to supports
    • B41F27/005Attaching and registering printing formes to supports

Definitions

  • the invention relates to a device for clamping a bendable pressure pad on a printing cylinder in or for a rotary printing press, preferably web-fed rotary printing press.
  • the invention can be used in particular in offset printing, both in wet and dry offset.
  • clamping devices of various types are known.
  • the DE 42 25 949 C2 discloses clamping by means of spring tongues.
  • Massive clamps are generally superior in terms of the precision with which the position of the respective nip can be given design.
  • a clamping device having a shaft extending longitudinally in the channel, in which a plurality of clamping pieces are movably guided radially in a sliding contact radially with respect to the shaft and acted upon radially outward against a clamping surface with a spring force with respect to the shaft.
  • the shaft is movable between a closed position, in which the clamping pieces each form a clamping gap with the clamping surface, and a release position to and fro.
  • the clamping device requires a considerable design effort.
  • a simpler clamping device is from the DE 10 2005 029 167.8 known. It comprises a plurality of clamping pieces, which are guided independently of each other in sliding contact directly by walls of the clamping channel linear and pressed by spring force against the clamping surface. Although the clamping device is cheaper to manufacture and easy to install, the linear guide still requires a very precise production of guide surfaces of the clamping channel and the clamping pieces. From the WO 02/043962 a clamping device is known with a tiltably mounted clamping piece.
  • the invention has for clamping a bendable pressure pad on a printing cylinder, a device to the object, hereinafter also referred to as clamping device comprising a clamping piece and a spring member for acting on the clamping piece with a spring force.
  • the clamping piece is arranged in a clamping channel of the printing cylinder and forms a clamping surface with a clamping gap, in which a Abbug the pressure pad is inserted.
  • the clamping piece on a flat, in particular to the clamping surface in approximately parallel surface, between which and the clamping surface of the clamping channel of the Abbug can be inserted.
  • the spring member is also arranged in the clamping channel. In any case, the spring force biases the clamping piece in the direction of the clamping surface.
  • the clamping piece Prior to insertion of the bend, it preferably biases the clamp against the clamping surface, i. before inserting the Abbug the clamping piece is preferably in contact with the clamping surface.
  • the clamping piece is stiff in relation to its clamping function, at least can be neglected in the clamping piece possibly existing elasticity against the elasticity of the spring member.
  • Clamp and spring member are preferably separate parts.
  • the clamping piece is preferably in one piece, whereby a multi-part clamping piece could find application.
  • the clamping piece contacted with an outer surface formed in the clamping channel bearing, which supports the clamping piece tilted.
  • the clamping piece is tilted in contact with the bearing against the restoring spring force of the spring member of the clamping surface.
  • the spring member is biased stronger in a tilting of the clamping piece, so that the clamping force exerted by the clamping piece in the clamping force increases when the clamping piece moves in a tilting movement of the clamping surface.
  • the spring force is introduced in a direction in the clamping piece, which has a common directional component with the direction of the force exerted by the clamping piece on the bearing point. More preferably, the two directions are at least substantially coincident. It is advantageous if the clamping force exerted by the clamping piece on the clamping surface and the force exerted by the clamping piece on the bearing point have a common directional component. More preferably, the two forces act in each case at least with their predominant part in the same direction.
  • the clamping piece is preferably tilted freely back and forth, so is stretched only by means of the spring force in the direction of the clamping surface, but in principle, the possibility of a releasable blocking the tilting mobility should not be excluded.
  • the clamping piece advantageously does not have to be forcibly tilted by means of an external engagement, but tilts away when inserting the Abbugs in the nip of the clamping surface and upon withdrawal of the Abbug due to the spring force by itself again in the direction of the clamping surface.
  • the insertion into the nip forces the tilting movement and pulling out allows them.
  • a tilting bearing can be precisely produced in a simple manner.
  • the processing effort is less with the same precision in terms of the location of the nip as for a linear guided clamping piece or a rotary joint with circumferential sliding surfaces.
  • the bearing can be seen in the tilt plane, i. in the cross section of the printing cylinder, form a short arc. More preferably, however, the bearing is formed by an edge.
  • the clamping piece with the bearing contact only in a line of contact.
  • the position of the contact line preferably does not change during the tilting movement.
  • the bearing point and the clamping piece on mutually congruent bearing surfaces which form over a tilt angle of preferably at most 30 °, a sliding pair, ie, a pivot bearing.
  • a tilt angle is sufficient, which just allows the insertion of the Abbugs.
  • tilting movements are advantageously possible by a tilt angle, which exceeds the minimum tilt angle required for the function by a certain amount, preferably only so much that, despite unavoidable manufacturing tolerances, the Kippbewegige is ensured by the minimum tilt angle.
  • the Kipplagerung it is sufficient and corresponds to preferred embodiments, when the clamping piece with the bearing point is only in pressure contact.
  • the clamping piece preferably has only a single degree of freedom of movement, namely the degree of freedom of the tilting movement about a tilting axis fixed with respect to the pressure cylinder.
  • the tilting axis preferably extends in or near the region of the contact, in the case of the most preferred embodiment of the line contact it coincides with the contact line or axis.
  • the concept of the contact line is not understood as a mathematically exact line, but only as a line, as it is approximated under the usual manufacturing conditions, ie manufacturing tolerances, a mathematically exact line.
  • either the clamping piece or, more preferably, the bearing point can form the edge.
  • the respective other, preferably the clamping piece preferably has a flat bearing surface for the pressure contact with the edge.
  • the clamping piece preferably forms only a single axially narrow clamping gap.
  • the axial, ie measured in the axial direction of the printing cylinder width of the nip and preferably the clamping piece as a whole is in preferred embodiments at most one tenth of the width of a pressure pad to be clamped simple width.
  • the width should be at most 30 mm or better at most 20 mm.
  • An axially narrow clamping piece with a single narrow nip is preferable in view of the precise specification of the location of the nip a broad nip or a wide clamping piece with two or more nips next to each other, as it becomes more difficult with increasing width, the tilt axis exactly the place and according to their orientation. Precision is also conducive if, to produce the spring force, only a clamping piece associated with it, i. provided on the clamping piece acting spring member, preferably arranged in the clamping channel. In preferred several acting on the same Abbug clamping pieces, preferably two clamping pieces per Abbug, this means that for each of the clamping pieces each have their own spring member is provided.
  • the feature of the narrow clamping piece, at least narrow nip, and the feature according to which, with several clamping pieces, each of the clamping pieces is supported independently of the other and acted upon by a spring force, are advantageously used in combination, but are also already alone advantageous, furthermore even without the here claimed invention of Kippbewegige.
  • a wall of the clamping channel forming the clamping surface advantageously extends as far as an opening of the clamping channel located on the outer periphery of the printing cylinder, at least substantially radially with respect to the axis of rotation or transversely to the circumferential direction of the printing cylinder.
  • this channel wall is flat.
  • a radial or substantially radial extension allows the absorption of a Abbugs, which points to the adjacent, resting on the peripheral surface of the printing cylinder portion of the printing pad at a right angle.
  • the clamping piece has in preferred embodiments, a bearing portion and a projecting from the bearing portion, in the cross section of the printing cylinder in comparison with the bearing portion narrow finger.
  • the finger forms the nip
  • the bearing portion is advantageously the assembly in the channel, preferably the tilting bearing of the clamping piece.
  • the assembly preferably comprises an attachment of the clamping piece, which leaves the clamping piece, however, the required freedom to perform its function.
  • the attachment may advantageously form an abutment for the spring member or hold the clamping piece to a filler, as long as the filler is not yet inserted into a matching recess of the printing cylinder.
  • the spring member may be supported on the filler and the clamping piece or on the fastening means and the clamping piece.
  • the spring member surrounds the attachment means, wherein, for example, the spring member may be surrounded by the clamping piece.
  • a fastening means in particular a mounting bolt, preferably a bolt serve.
  • the spring force preferably acts in the longitudinal direction of the mounting bolt.
  • clamping channel a further clamping piece is expediently arranged, with which the other Abbug the same pressure pad or a turn of another pressure pad can be clamped.
  • the clamping device is thus formed largely symmetrically with respect to the clamping pieces and their mobility with respect to the leading and the trailing side of the clamping channel.
  • a difference to be pointed out results in preferred embodiments, however, from the fact that the clamping pieces are advantageously mounted on the same side of the clamping channel, but the respective spring force applied in different directions, preferably in opposite directions on the two types of clamping pieces becomes.
  • the assembly of both types of clamping pieces on the same side of the clamping channel ie on the same side seen in the circumferential direction of the printing cylinder, simplifies the manufacture and assembly.
  • the axially offset in the clamping channel to each other clamping pieces overlap each other in the circumferential direction of the printing cylinder.
  • the clamping pieces or at least the areas of the clamping pieces which form the clamping gaps overlap each other in particular, if no pressure pad is clamped, so no turning into one of the clamping gaps of the overlapping clamping pieces protrudes.
  • the clamping pieces have said bearing portions and the nip forming fingers, it is sufficient in principle, if only the fingers overlap each other, but more preferably also overlap the bearing portions.
  • Mutually overlapping clamping pieces are particularly advantageous if the opening of the clamping channel and the channel region adjoining the opening radially inwardly are very narrow, for example 5 mm or even narrower.
  • the overlapping arrangement makes it possible to make the portions of the clamping pieces, which form the clamping gaps, thicker and thus stiffer in the circumferential direction of the printing cylinder than is possible next to one another in the case of an arrangement in the circumferential direction.
  • the spring members are preferably mechanical springs and may be in particular spring-loaded coil springs or coil springs. Alternatively, pneumatic springs come into question. If a common spring member is used for several clamps, this also applies to such a spring member.
  • the printing cylinder is preferably a forme cylinder, but may for example also be a blanket cylinder, as are known, for example, from the newspaper offset printing.
  • the printing cylinder preferably has twice the circumference. If necessary, he also has only a simple scope.
  • the printing cylinder is a blanket cylinder, it may have a single continuous clamping channel or a plurality of axially offset clamping channels, which are offset from one another in the circumferential direction.
  • the blanket or the plurality of blankets arranged side by side on the blanket cylinder in such embodiments span the full circumference of the cylinder. However, a subdivision in the circumferential direction is also conceivable.
  • the pressure cylinder is a form cylinder
  • the one or more clamping channels extend or extend axially over at least the major part of the length of the forme cylinder.
  • a forme cylinder simple circumference in particular a single continuous channel and a double-circumference form cylinder having two continuous channels with an offset from each other by 180 ° in the circumferential direction.
  • axially offset clamping channels can also be provided in the case of a forme cylinder, which are offset from one another in the circumferential direction.
  • a forme cylinder of twice the circumference may, for example, have two groups of two clamping channels axially next to one another, wherein the clamping channels within the respective group are offset by 180 ° in the circumferential direction and the clamping channels are offset from one another by 90 ° from one group to the next.
  • the Figures 1 and 2 show a forme cylinder 1 of a web-fed rotary offset printing press in each case a different cross-section.
  • the forme cylinder 1 has a double circumference, ie at the periphery of the forme cylinder 1 in the circumferential direction two printing plates 2 and 4 are arranged in succession and clamped by two clamping devices which are arranged in two clamping channels.
  • the clamping channels each extend continuously over the entire axial length of the forme cylinder 1 and are mutually offset in the circumferential direction by 180 °.
  • the forme cylinder 1 can in particular be four or six newspaper pages wide.
  • the printing plates 2 and 4 have at their leading in the direction of rotation V and trailing ends each a turn on, which is clamped in one of the two clamping channels.
  • the clamping device comprises a plurality of first clamping pieces 11, which are arranged in the axial direction of the forme cylinder 1 side by side in the clamping channel and by means of which the side by side on the forme cylinder 1 arranged printing plates 2 can be clamped at their leading turns 3.
  • the clamping device further comprises a plurality of second clamping pieces 12, which are also arranged at intervals axially adjacent to each other in the clamping channel and by means of which on the forme cylinder 1 juxtaposed printing plates 4 can be clamped at their trailing turns 5.
  • FIG. 1 is one of the first clamping pieces 11 and in FIG. 2 one of the second clamping pieces 12 is shown.
  • the clamping pieces 11 and 12 are arranged alternately in the axial direction of the forme cylinder 1 and in each case at a distance from each other and stored so that each of the clamping pieces 11 and 12 can independently perform the movement required for the clamping of each other.
  • two first clamping pieces 11 are provided for the leading Abbug 3 and two second clamping pieces 12 for the trailing Abbug 5.
  • Each of the clamping pieces 11 and 12 forms only a single nip F.
  • the clamping pieces 11 and 12 are compared to the printing plates 2 and 4 is very narrow; Preferably, its width measured in the axial direction is at most one tenth, more preferably at most one twentieth of the width of the single-wide printing plates 2 and 4.
  • the clamping pieces 11 and 12 are mounted on a filler 8, which is inserted in a recess of the forme cylinder 1 and fixed to the forme cylinder 1 and immovably connected.
  • the filler 8 forms a short arc portion of the outer peripheral surface of the forme cylinder 1. Unless the assembly of the clamping device is concerned, the filler 8 can be considered as belonging to the forme cylinder 1.
  • the clamping channel has on the outer circumference of the forme cylinder 1 an axially straight, slot-shaped channel opening through which the bends 3 and 5 protrude into the clamping channel. Close to the channel opening, a leading channel wall 1a and a trailing channel wall 1b.
  • the clamping pieces 11 form with the leading channel wall 1a depending on a nip F for the leading prints 3.
  • the clamping pieces 12 form for the trailing turns 5 each have a nip F with the trailing channel wall 1b.
  • the channel walls 1a and 1b thus form the mating surfaces or clamping surfaces for the clamping pieces 11 and 12.
  • the channel walls 1a and 1b extend from the channel opening to at least the respective nip F plane parallel to an axial / radial plane on the axis of rotation of the forme cylinder first Since they are only a few millimeters apart, you can also, in a good approximation, also be referred to as axial / radial planes. In the exemplary embodiment, they also extend radially inward even beyond the respective clamping gap F to each other plane-parallel. Radially inwardly from the narrow gap between the channel walls 1a and 1b, the clamping channel opens to a receiving space for the storage and assembly of the clamping pieces 11 and 12th
  • the clamping pieces 11 are equal to each other, and they are mounted in the same way and movably mounted for clamping. Designs only one of the clamping pieces 11 thus apply equally to the other clamping pieces 11.
  • the clamping piece 11 consists of a bearing portion 13 which is received in the receiving space of the clamping channel and is surrounded by the walls thereof, and a finger 14 which protrudes from the bearing portion 13 outwardly toward the channel opening and into the gap between the channel walls 1a and 1b protrudes.
  • the finger 14 forms with the channel wall 1 a the nip F.
  • the finger 14 tapers from the nip F in the direction of the channel opening, so that an insertion funnel for the Abbug 3 is formed. In the exemplary embodiment, it has a constant inclination from its outer end in the direction of the clamping gap F.
  • the clamping piece 11 is tiltable in the cross-sectional plane about a tilt axis R as a whole.
  • the tilting axis R is formed by a pressure contact of the clamping piece 11 with a bearing point, in the embodiment an axially straight edge, which is formed with respect to the axis of rotation of the forme cylinder 1 radially inwardly of the nip F on a channel wall 1 c of the receiving space.
  • the channel wall 1c forms a bottom of the clamping channel.
  • In the channel wall 1c is axially continuous recess 18, in the embodiment, a rectangular groove, incorporated.
  • the bearing point is from one of the two outer edges of the recess 18th educated. The edges are each shaped as an edge.
  • the clamping piece 11 has a corresponding bearing surface, with which it presses against the bearing point formed in the clamping channel.
  • the clamping member 11 is acted upon by a prestressed spring member 7 with a spring force which biases the finger 14 in the direction of the channel wall 1a.
  • the spring member 7 is a loaded on compression coil spring.
  • Each of the clamping pieces 11 is assigned in each case its own spring member 7, which acts in each case only on the associated clamping piece 11.
  • the spring member 7 presses the clamping piece 11 further against the bearing point.
  • the spring axis of the spring member 7 extends at right angles to the channel wall 1a. An inclination would be less preferred, but still possible.
  • the force exerted by the spring member 7 on the clamping piece 11 spring force acts substantially in the same direction as the force exerted by the clamping piece 11 on the bearing pressure.
  • the clamping piece 11 contacts the bearing with an outer surface which faces in substantially the same direction as that surface with which the clamping piece 11 forms the nip F.
  • the clamping piece 11 is mounted by means of a mounting bolt 9, which is designed in the embodiment as a bolt on the side of the clamping channel on which the channel wall 1 a is formed.
  • the mounting bolt 9 has a shoulder on which the spring member 7 is supported.
  • the spring member 7 is stretched in this way between the mounting bolt 9 and the clamping piece 11 and pushes the clamping piece 11 in the direction of its spring axis and thus the finger 14 in the direction of the channel wall 1a, whereby the for clamping of the Abbugs 3 in the nip F required clamping force is generated.
  • the mounting bolt 9 is perpendicular to the axial / radial plane of the forme cylinder 1, which extends centrally between the two edges of the channel opening.
  • All of the clamping pieces 11 and 12 each protrude with a projection 16 in the recess 18 and form with one of the two edges of the recess 18, the tilting bearing for the respective clamping piece 11 or 12.
  • the spring member 7 acts on the tilting of the axis R to the nip F extending, conceived as a straight line rocker between the tilting axis R and the nip F. This results in a translation obtained by the spring travel of the spring member 7 is smaller than the arc, the fingers 14 travels in a tilting movement.
  • the spring axis is perpendicular to the rocker arm. However, an inclination would also be possible.
  • the clamping piece 11 surrounds the edge of the recess 18 which forms the tilting bearing for the clamping piece 11, with a concave portion.
  • the concave portion has an inner edge formed by two surfaces at an obtuse angle. One of the surfaces is formed by the projection 16 and the other of the surfaces is formed by the bearing portion 13.
  • the projection 16 is tapered in cross-section conical to its free end.
  • the bearing surface of the clamping piece 11, which contacts the bearing point of the clamping channel is therefore in relation to the spring axis simply as an inclined plane, d. H. as a plane with constant slope, shaped.
  • the tilting bearing is formed in this way in the manner of a rocker.
  • the tilting axis could be formed in a region of the finger 14 near the bearing portion 13 in the same shape of the clamping piece 11, in the embodiment at the radially inner edge the channel wall 1a. Such an arrangement would correspond directly to a rocker.
  • the bearing portion 13 forms a U-shaped bracket which connects the finger 14 rigidly with the projection 16.
  • the spring axis of the spring member 7 and the longitudinal axis of the mounting bolt 9 are parallel to the two legs of the bracket.
  • the mounting bolt 9 penetrates for attachment to the filler 8 the web 15, which forms the bottom of the bracket.
  • the finger 14 projects from the radially outer leg of the bracket outward, and the projection 16 protrudes from the inner leg of the bracket radially inward.
  • the finger 14 and the projection 16 protrude from the free, remote from the bottom of the bracket end of the respective leg and based on the two legs at the same height.
  • the tilting axis R is therefore formed at least to a good approximation radially below the clamping gap F.
  • the rocker arm between the tilting axis R and the nip F extends in straight extension to the channel wall 1a, so that a clamping gap F forming surface area of the finger 14 of the clamping gap F co-forming clamping surface of the channel wall 1a at the insertion of the Abbugugs in the right Angle tilts.
  • the bearing portion 13 is enclosed in the receiving space between two radially opposite walls 1d with a small clearance.
  • the game is chosen so that the location of the clamping gap F is precisely predetermined, on the other hand, however, the tilting movements are not hindered.
  • the game is at most 0.1 mm, preferably it is only a few hundredths of a millimeter.
  • the receiving space extends with respect to the clamping surface of the leading channel wall 1a below the level of the clamping surface. At the same time, the receiving space could alternatively extend below the level of the clamping surface of the trailing channel wall 1b.
  • the walls 1d forming the receiving space are preferably approximately perpendicular to the channel wall 1a, d. H.
  • the walls 1d are advantageously parallel to each other.
  • the bearing portion 13 is in its bow portion to its side facing away from the finger 14 side, d. H. towards a channel wall 1e, tapered, so that the bracket can not hinder the tilting movements.
  • the channel wall 1e is preferably approximately parallel to the leading or trailing channel wall 1a, 1b and, alternatively or additionally, approximately perpendicular to the walls 1d.
  • the mounting bolt 9 is bordered by the web 15 of the clamping piece 11. It is also true for these edging formed by the web 15 that it has just enough play that the tilting movements of the clamping piece 11 are not obstructed.
  • the two enclosures namely on the one hand, the enclosure through the channel walls 1d and on the other the enclosure of the mounting bolt 9, are realized in combination in the embodiment. In principle, one of the two enclosures would be sufficient, in particular in the clamping piece 12, which surrounds the mounting bolt 9 close to the rocker arm by means of a web 17.
  • the clamping piece 12 differs from the clamping piece 11 only with respect to the direction in which the associated spring member 7 acts on the clamping piece 12. Since the clamping piece 12 is mounted on the same side of the clamping channel as the clamping piece 11, namely on the filler 8, the finger 14 of the clamping piece 12, however, forms the clamping gap with the opposite, trailing channel wall 1b, the spring member 7 can directly on the channel wall 1e support. The spring member 7 acts on the web 17, which connects the only remaining leg of the bracket 11 of the clamping piece with each other. The mounting bolt 9 protrudes through the web 17, as already through the web 15 of the clamping piece eleventh
  • a plurality of the clamping pieces 11 and a plurality of the clamping pieces 12 are arranged in alternating succession at intervals with respect to each other in the clamping channel.
  • each one of the clamping pieces 11 is arranged close to one of the clamping pieces 12, and between the arrangement according to the pairs formed in each case remains a greater distance.
  • the fingers 14 arranged in the same clamping channel clamping pieces 11 and 12 overlap each other in the circumferential direction of the forme cylinder, d. H. they are in an axial flight. They overlap each other to a greater extent, preferably for the most part, in both extreme tilt positions, d. H. both in the tilted position that they occupy prior to insertion of the associated Abbugs 3 or 5, as well as in the tilted position they take when the assigned Abbug 3 or 5 is clamped. In this way, the narrow space in the circumferential direction, which remains between the channel walls 1a and 1b, in the sense of maximum rigidity of the clamping pieces 11 and 12 is used.
  • the bends 3 are the non-clamping clamping pieces 12 and the bends 5 are the non-clamping clamping pieces 12 opposite each provided with a recess 6.
  • the clamping pieces 11 When clamping the respectively associated Abbugs, for example when clamping the Abbugs 3 by the clamping pieces 11, the clamping pieces 11 are tilted in the region of the respective opposite recess 6 to almost against the channel wall 1b.
  • This measure also contributes to the fact that the fingers 14 are as thick as possible and thus the clamping pieces 11 and 12 can be stirred as stiff as possible.
  • the channel walls 1a and 1b move very close to each other and the channel opening are particularly narrow.
  • the clamping device allows a quick change of printing plates 2 and 4 in a simple manner.
  • the printing plate 2 is raised at the respective end and thereby pulled the Abbug 3 from the nip F.
  • the clamping piece 11 tilts against the channel wall 1a due to the spring force.
  • the trailing Abbug the printing plate 2 is pulled out of the nip formed in the opposite clamping channel and the used printing form 2 transported away.
  • a new printing plate 2 for the next production is introduced with one of its two turns in the associated clamping channel.
  • the Abbug 3 is guided in the insertion funnel formed by the finger 14 in the direction of the bottom of the insertion funnel and thus in the direction of the nip F and finally inserted by pressure in the nip F. This is done in the context of a continuous insertion movement of the short Abbüg 3.
  • the Abbug 3, and also the other Abbugen the printing plates 2 and 4 has a measured along the channel wall 1 a height of preferably at most 10 mm, more preferably at most 9 mm.
  • the register device comprises at least one register cam, preferably exactly one register cam, per printing form 2 and 4 and takes care of itself known manner for setting the page register.
  • the printing form 2 passes only after the successful in this way adjustment of the side register in the nip F, ie for clamping the Abbugt 3 is only the foremost area available.
  • a further advantage in particular with regard to an automatic printing plate change, is the free tilting mobility during insertion against and during withdrawal supported by the spring force.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

The invention relates to a device for clamping at least one flexible printing plate to a printing cylinder, said device comprising: a) a clamping piece (11, 12) which is arranged in a clamping channel of the printing cylinder (1) and forms, with a clamping surface, a clamping gap (F) into which a front part (3, 5) of the printing plate (2, 3) can be inserted; and b) an elastic element for subjecting the clamping piece (11, 12) to an elastic force; c) an outer surface of the clamping piece (11, 12) pressing against a bearing point which is formed in the clamping channel and supports the clamping piece (11, 12) in such a way that it can be tilted, against the elastic force, away from the clamping surface.

Description

Die Erfindung betrifft eine Vorrichtung zum Klemmen eines biegbaren Druckbelags auf einem Druckzylinder in einer oder für eine Rotationsdruckmaschine, vorzugsweise Rollenrotationsdruckmaschine. Die Erfindung kann insbesondere im Offsetdruck Verwendung finden, sowohl im Nass- als auch im Trocken-Offset.The invention relates to a device for clamping a bendable pressure pad on a printing cylinder in or for a rotary printing press, preferably web-fed rotary printing press. The invention can be used in particular in offset printing, both in wet and dry offset.

Zum Klemmen von Druckbelägen sind Klemmvorrichtungen unterschiedlichster Bauart bekannt. Die DE 42 25 949 C2 offenbart ein Klemmen mittels Federzungen. Derartige Klemmvorrichtungen sind zwar einfach herstellbar und deshalb preiswert, hinsichtlich der genauen Positionierung des Klemmspalts jedoch problematisch. Massive Klemmstücke sind in Bezug auf die Präzision, mit der die Position des jeweiligen Klemmspalts konstruktiv vorgegeben werden kann, im allgemeinen überlegen. Aus der DE 200 22 737 U1 ist eine Klemmvorrichtung mit einer in dem Kanal sich in Längsrichtung erstreckenden Welle bekannt, in der mehrere Klemmstücke radial zu der Welle beweglich je in einem Gleitkontakt geführt und in Bezug auf die Welle nach radial außen gegen eine Klemmfläche mit einer Federkraft beaufschlagt werden. Die Welle ist zwischen einer Schließposition, in der die Klemmstücke je einen Klemmspalt mit der Klemmfläche bilden, und einer Freigabeposition hin und her beweglich. Die Klemmvorrichtung erfordert einen erheblichen Konstruktionsaufwand. Eine einfachere Klemmvorrichtung ist aus der DE 10 2005 029 167.8 bekannt. Sie umfasst mehrere Klemmstücke, die unabhängig voneinander im Gleitkontakt unmittelbar von Wänden des Klemmkanals linear geführt und mittels Federkraft gegen die Klemmfläche gedrückt werden. Die Klemmvorrichtung ist zwar preiswerter in der Herstellung und einfach montierbar, die Linearführung erfordert jedoch immer noch eine sehr präzise Fertigung von Führungsflächen des Klemmkanals und der Klemmstücke. Aus der WO 02/043962 ist eine Klemmvorrichtung bekannt mit einem kippbar gelagerten Klemmstück.For clamping of pressure linings clamping devices of various types are known. The DE 42 25 949 C2 discloses clamping by means of spring tongues. Although such clamping devices are easy to produce and therefore inexpensive, but problematic in terms of the exact positioning of the nip. Massive clamps are generally superior in terms of the precision with which the position of the respective nip can be given design. From the DE 200 22 737 U1 For example, there is known a clamping device having a shaft extending longitudinally in the channel, in which a plurality of clamping pieces are movably guided radially in a sliding contact radially with respect to the shaft and acted upon radially outward against a clamping surface with a spring force with respect to the shaft. The shaft is movable between a closed position, in which the clamping pieces each form a clamping gap with the clamping surface, and a release position to and fro. The clamping device requires a considerable design effort. A simpler clamping device is from the DE 10 2005 029 167.8 known. It comprises a plurality of clamping pieces, which are guided independently of each other in sliding contact directly by walls of the clamping channel linear and pressed by spring force against the clamping surface. Although the clamping device is cheaper to manufacture and easy to install, the linear guide still requires a very precise production of guide surfaces of the clamping channel and the clamping pieces. From the WO 02/043962 a clamping device is known with a tiltably mounted clamping piece.

Es ist eine Aufgabe der Erfindung, eine einfache Klemmvorrichtung mit präzise lokalisiertem Klemmspalt zu schaffen.It is an object of the invention to provide a simple clamping device with precisely located nip.

Die Erfindung hat zum Klemmen eines biegbaren Druckbelags auf einem Druckzylinder eine Vorrichtung zum Gegenstand, im folgenden auch Klemmvorrichtung genannt, die ein Klemmstück und ein Federglied zur Beaufschlagung des Klemmstücks mit einer Federkraft umfasst. Das Klemmstück ist in einem Klemmkanal des Druckzylinders angeordnet und bildet mit einer Klemmfläche einen Klemmspalt, in den ein Abbug des Druckbelags einsteckbar ist. Beispielsweise weist das Klemmstück eine ebene, insbesondere zur Klemmfläche in etwa parallele Fläche auf, zwischen der und der Klemmfläche des Klemmkanals der Abbug einsteckbar ist. Das Federglied ist ebenfalls in dem Klemmkanal angeordnet. Jedenfalls spannt die Federkraft das Klemmstück in Richtung auf die Klemmfläche. Vor dem Einstecken des Abbugs spannt es das Klemmstück vorzugsweise gegen die Klemmfläche, d.h. vor dem Einstecken des Abbugs ist das Klemmstück vorzugsweise in Kontakt mit der Klemmfläche. Das Klemmstück ist in Bezug auf seine Klemmfunktion in sich steif, zumindest kann eine bei dem Klemmstück möglicherweise vorhandene Elastizität gegenüber der Elastizität des Federglieds vernachlässigt werden. Klemmstück und Federglied sind bevorzugt separate Teile. Das Klemmstück ist vorzugsweise einstückig, wobei auch ein mehrteiliges Klemmstück Anwendung finden könnte. Durch die Fertigung des Klemmstücks als in diesem Sinne steifer Körper kann der Abstand, den der Klemmspalt von einem am äußeren Umfang des Druckzylinders gelegenen Rand des Klemmkanals aufweist, präzise vorgegeben werden. Eine exakte Einhaltung eines Sollabstands zum Rand ist wünschenswert, weil das Seitenregister des zu klemmenden Druckbelags vorteilhafterweise vor dem Klemmen eingestellt wird.The invention has for clamping a bendable pressure pad on a printing cylinder, a device to the object, hereinafter also referred to as clamping device comprising a clamping piece and a spring member for acting on the clamping piece with a spring force. The clamping piece is arranged in a clamping channel of the printing cylinder and forms a clamping surface with a clamping gap, in which a Abbug the pressure pad is inserted. For example, the clamping piece on a flat, in particular to the clamping surface in approximately parallel surface, between which and the clamping surface of the clamping channel of the Abbug can be inserted. The spring member is also arranged in the clamping channel. In any case, the spring force biases the clamping piece in the direction of the clamping surface. Prior to insertion of the bend, it preferably biases the clamp against the clamping surface, i. before inserting the Abbug the clamping piece is preferably in contact with the clamping surface. The clamping piece is stiff in relation to its clamping function, at least can be neglected in the clamping piece possibly existing elasticity against the elasticity of the spring member. Clamp and spring member are preferably separate parts. The clamping piece is preferably in one piece, whereby a multi-part clamping piece could find application. By manufacturing the clamping piece as in this sense rigid body, the distance that has the nip of a located on the outer periphery of the impression cylinder edge of the clamping channel, can be precisely specified. An exact compliance with a desired distance to the edge is desirable because the side register of the pressure pad to be clamped is advantageously set before clamping.

Nach der Erfindung kontaktiert das Klemmstück mit einer äußeren Oberfläche eine in dem Klemmkanal gebildete Lagerstelle, die das Klemmstück kippbar lagert. Das Klemmstück ist im Kontakt mit der Lagerstelle gegen die rückstellende Federkraft des Federglieds von der Klemmfläche weg kippbar. Das Federglied wird bei einem Wegkippen des Klemmstücks stärker gespannt, so dass die im Klemmspalt von dem Klemmstück ausgeübte Klemmkraft zunimmt, wenn das Klemmstück sich bei einer Kippbewegung von der Klemmfläche entfernt.According to the invention, the clamping piece contacted with an outer surface formed in the clamping channel bearing, which supports the clamping piece tilted. The clamping piece is tilted in contact with the bearing against the restoring spring force of the spring member of the clamping surface. The spring member is biased stronger in a tilting of the clamping piece, so that the clamping force exerted by the clamping piece in the clamping force increases when the clamping piece moves in a tilting movement of the clamping surface.

In bevorzugter Ausführung wird die Federkraft in eine Richtung in das Klemmstück eingeleitet, die mit der Richtung der Kraft, die das Klemmstück auf die Lagerstelle ausübt, eine gemeinsame Richtungskomponente hat. Bevorzugter stimmen die beiden Richtungen zumindest im wesentlichen überein. Vorteilhaft ist, wenn die von dem Klemmstück auf die Klemmfläche ausgeübte Klemmkraft und die von dem Klemmstück auf die Lagerstelle ausgeübte Kraft eine gemeinsame Richtungskomponente haben. Bevorzugter wirken die beiden Kräfte jeweils wenigstens mit ihrem überwiegenden Teil in die gleiche Richtung. Das Klemmstück ist vorzugsweise frei hin und her kippbar, wird also nur mittels der Federkraft in Richtung auf die Klemmfläche gespannt, grundsätzlich soll jedoch die Möglichkeit einer lösbaren Blockierung der Kippbeweglichkeit nicht ausgeschlossen werden. Das Klemmstück muss vorteilhafterweise nicht mittels eines äußeren Eingriffs zwangsweise gekippt werden, sondern kippt bei Einführen des Abbugs in den Klemmspalt von der Klemmfläche weg und bei einem Herausziehen des Abbugs aufgrund der Federkraft von selbst wieder in Richtung auf die Klemmfläche zu. Das Einstecken in den Klemmspalt erzwingt die Kippbewegung und das Herausziehen ermöglicht sie.In a preferred embodiment, the spring force is introduced in a direction in the clamping piece, which has a common directional component with the direction of the force exerted by the clamping piece on the bearing point. More preferably, the two directions are at least substantially coincident. It is advantageous if the clamping force exerted by the clamping piece on the clamping surface and the force exerted by the clamping piece on the bearing point have a common directional component. More preferably, the two forces act in each case at least with their predominant part in the same direction. The clamping piece is preferably tilted freely back and forth, so is stretched only by means of the spring force in the direction of the clamping surface, but in principle, the possibility of a releasable blocking the tilting mobility should not be excluded. The clamping piece advantageously does not have to be forcibly tilted by means of an external engagement, but tilts away when inserting the Abbugs in the nip of the clamping surface and upon withdrawal of the Abbug due to the spring force by itself again in the direction of the clamping surface. The insertion into the nip forces the tilting movement and pulling out allows them.

Eine Kipplagerung ist auf einfache Weise präzise herstellbar. Der Bearbeitungsaufwand ist bei gleicher Präzision hinsichtlich des Orts des Klemmspalts geringer als für ein linear geführtes Klemmstück oder ein Drehgelenk mit umlaufenden Gleitflächen. Allerdings kann die Lagerstelle in der Kippebene gesehen, d.h. im Querschnitt des Druckzylinders, einen kurzen Bogen bilden. Bevorzugter wird die Lagerstelle jedoch von einer Kante gebildet.A tilting bearing can be precisely produced in a simple manner. The processing effort is less with the same precision in terms of the location of the nip as for a linear guided clamping piece or a rotary joint with circumferential sliding surfaces. However, the bearing can be seen in the tilt plane, i. in the cross section of the printing cylinder, form a short arc. More preferably, however, the bearing is formed by an edge.

Bevorzugt hat das Klemmstück mit der Lagerstelle Kontakt nur in einer Kontaktlinie. Die Position der Kontaktlinie ändert sich bei der Kippbewegung vorzugsweise nicht. In alternativen Ausführungen, denen gegenüber jedoch ein Linienkontakt bevorzugt wird, weisen die Lagerstelle und das Klemmstück zueinander kongruente Lagerflächen auf, die über einen Kippwinkel von vorzugsweise höchstens 30° eine Gleitpaarung, d.h. ein Drehlager bilden. Für die Funktion des Klemmstücks genügt ein Kippwinkel, der gerade das Einstecken des Abbugs erlaubt. Für die praktischen Belange sind vorteilhafterweise Kippbewegungen um einen Kippwinkel möglich, der den für die Funktion erforderlichen minimalen Kippwinkel um ein gewisses Maß übersteigt, bevorzugt nur soviel, dass trotz unvermeidbarer Fertigungstoleranzen die Kippbeweglichkeit um den minimalen Kippwinkel gewährleistet ist. Für die Kipplagerung genügt es und entspricht bevorzugten Ausführungen, wenn das Klemmstück mit der Lagerstelle nur in Druckkontakt ist.Preferably, the clamping piece with the bearing contact only in a line of contact. The position of the contact line preferably does not change during the tilting movement. In alternative embodiments, to which, however, a line contact is preferred over, the bearing point and the clamping piece on mutually congruent bearing surfaces which form over a tilt angle of preferably at most 30 °, a sliding pair, ie, a pivot bearing. For the function of the clamping piece a tilt angle is sufficient, which just allows the insertion of the Abbugs. For practical purposes tilting movements are advantageously possible by a tilt angle, which exceeds the minimum tilt angle required for the function by a certain amount, preferably only so much that, despite unavoidable manufacturing tolerances, the Kippbeweglichkeit is ensured by the minimum tilt angle. For the Kipplagerung it is sufficient and corresponds to preferred embodiments, when the clamping piece with the bearing point is only in pressure contact.

Das Klemmstück hat bevorzugt nur einen einzigen Freiheitsgrad der Bewegung, nämlich den Freiheitsgrad der Kippbewegung um eine in Bezug auf den Druckzylinder ortsfeste Kippachse. Die Kippachse erstreckt sich vorzugsweise in oder nahe bei dem Bereich des Kontakts, im Falle der am meisten bevorzugten Ausführung des Linienkontakts fällt sie mit der Kontaktlinie bzw. -achse zusammen. Hierbei wie auch im vorstehenden Zusammenhang wird der Begriff der Kontaktlinie nicht als mathematisch exakte Linie, sondern nur als eine Linie verstanden, wie sie unter den üblichen Fertigungsbedingungen, sprich Fertigungstoleranzen, einer mathematisch exakten Linie angenähert wird.The clamping piece preferably has only a single degree of freedom of movement, namely the degree of freedom of the tilting movement about a tilting axis fixed with respect to the pressure cylinder. The tilting axis preferably extends in or near the region of the contact, in the case of the most preferred embodiment of the line contact it coincides with the contact line or axis. Here as well as in the above context, the concept of the contact line is not understood as a mathematically exact line, but only as a line, as it is approximated under the usual manufacturing conditions, ie manufacturing tolerances, a mathematically exact line.

In Ausführungen, in denen die Kippachse von einer Kante und somit unmittelbar auf der Kontaktlinie gebildet wird, kann entweder das Klemmstück oder bevorzugter die Lagerstelle die Kante bilden. Das jeweils andere, vorzugsweise das Klemmstück, weist für den Druckkontakt mit der Kante vorzugsweise eine plane Lagerfläche auf. Obgleich einer Kippbeweglichkeit um eine Kante der Vorzug gegeben wird, da hierdurch am besten sichergestellt werden kann, dass die Kippachse in Bezug auf den Formzylinder ortsfest ist, soll nicht grundsätzlich ausgeschlossen werden, dass die im Druckkontakt befindlichen Kontaktpartner beispielsweise zueinander konvex gekrümmt sind, woraus sich allerdings eine nicht ganz so vorteilhafte Roll- oder Roll/Gleit-Beweglichkeit des Klemmstücks ergibt. Falls das Kipplager als Drehgelenk um eine in Bezug auf den Formzylinder ortsfeste, von dem Kontaktbereich beabstandete Kippachse gebildet ist, kann entweder die Lagerstelle oder das Klemmstück die partiell umgebende Lagerfläche bilden.In embodiments in which the tilting axis is formed by an edge and thus directly on the contact line, either the clamping piece or, more preferably, the bearing point can form the edge. The respective other, preferably the clamping piece, preferably has a flat bearing surface for the pressure contact with the edge. Although a tilting mobility is given preference around an edge, as this can best be ensured that the tilting axis is stationary with respect to the forme cylinder, should not be ruled out in principle that the contact partners are in pressure contact, for example, convexly curved, from which However, a not so advantageous rolling or rolling / sliding mobility of the clamping piece results. If the tilting bearing is formed as a hinge about a with respect to the forme cylinder fixed, spaced from the contact area tilting axis, either the bearing point or the clamping piece form the partially surrounding bearing surface.

Das Klemmstück bildet vorzugsweise nur einen einzigen axial schmalen Klemmspalt. Die axiale, d.h. in Achsrichtung des Druckzylinders gemessene Breite des Klemmspalts und vorzugsweise des Klemmstücks insgesamt ist in bevorzugten Ausführungen höchstens ein Zehntel der Breite eines zu klemmenden Druckbelags einfacher Breite. Im bevorzugten Anwendungsbeispiel, im Zeitungsdruck, höchstens einem Zehntel, bevorzugter höchstens einem Zwanzigstel der in Achsrichtung gemessenen Breite einer liegenden Zeitungsseite. In absoluten Zahlen ausgedrückt sollte die Breite höchstens 30 mm oder besser höchstens 20 mm sein.The clamping piece preferably forms only a single axially narrow clamping gap. The axial, ie measured in the axial direction of the printing cylinder width of the nip and preferably the clamping piece as a whole is in preferred embodiments at most one tenth of the width of a pressure pad to be clamped simple width. In the preferred application example, in newspaper printing, at most one tenth, more preferably at most one twentieth of the width of a horizontal newspaper page measured in the axial direction. In absolute terms, the width should be at most 30 mm or better at most 20 mm.

Ein axial schmales Klemmstück mit einem einzigen schmalen Klemmspalt ist im Hinblick auf die präzise Vorgabe des Orts des Klemmspalts einem breiten Klemmspalt oder einem breiten Klemmstück mit nebeneinander zwei oder mehr Klemmspalten vorzuziehen, da es mit zunehmender Breite immer schwieriger wird, die Kippachse exakt dem Ort und ihrer Ausrichtung nach zu positionieren. Der Präzision ist ferner förderlich, wenn zur Erzeugung der Federkraft ein nur dem Klemmstück zugeordnetes, d.h. auf das Klemmstück wirkendes Federglied vorgesehen, vorzugsweise in den Klemmkanal angeordnet ist. Bei bevorzugt mehreren auf den gleichen Abbug wirkenden Klemmstücken, vorzugsweise zwei Klemmstücken pro Abbug, bedeutet dies, dass für jedes der Klemmstücke jeweils ein anderes, eigenes Federglied vorgesehen ist. Das Merkmal des schmalen Klemmstücks, zumindest schmalen Klemmspalts, und das Merkmal, wonach bei mehreren Klemmstücken jedes der Klemmstücke unabhängig von den anderen gelagert und mit einer Federkraft beaufschlagt wird, kommen zwar vorteilhaft in Kombination zum Einsatz, sind aber auch alleine bereits von Vorteil, ferner auch ohne die hier beanspruchte Erfindung der Kippbeweglichkeit.An axially narrow clamping piece with a single narrow nip is preferable in view of the precise specification of the location of the nip a broad nip or a wide clamping piece with two or more nips next to each other, as it becomes more difficult with increasing width, the tilt axis exactly the place and according to their orientation. Precision is also conducive if, to produce the spring force, only a clamping piece associated with it, i. provided on the clamping piece acting spring member, preferably arranged in the clamping channel. In preferred several acting on the same Abbug clamping pieces, preferably two clamping pieces per Abbug, this means that for each of the clamping pieces each have their own spring member is provided. The feature of the narrow clamping piece, at least narrow nip, and the feature according to which, with several clamping pieces, each of the clamping pieces is supported independently of the other and acted upon by a spring force, are advantageously used in combination, but are also already alone advantageous, furthermore even without the here claimed invention of Kippbeweglichkeit.

Eine die Klemmfläche bildende Wand des Klemmkanals erstreckt sich vorteilhafterweise bis zu einer an dem äußeren Umfang des Druckzylinders gelegenen Öffnung des Klemmkanals zumindest im wesentlichen radial zu der Drehachse oder quer zur Umfangsrichtung des Druckzylinders. Vorzugsweise ist diese Kanalwand plan. Eine radiale oder im wesentlichen radiale Erstreckung erlaubt die Aufnahme eines Abbugs, der zu dem angrenzenden, auf der Umfangsfläche des Druckzylinders aufliegenden Bereich des Druckbelags in einem rechten Winkel weist. In bevorzugten Weiterentwicklungen erstreckt sich in Umfangsrichtung der Klemmfläche zugewandt auf der anderen Seite des Klemmkanals eine ebensolche Kanalwand, die eine weitere Klemmfläche für den anderen Abbug des gleichen Druckbelags oder den Abbug eines weiteren Druckbelags bildet und die insbesondere parallel zur Klemmfläche sein kann. Die Erfindung weiterbildende Merkmale derartiger Druckbeläge und Klemm- und Öffnungsbereiche von Klemmkanälen werden in der DE 10 2005 029 167 beschrieben. Eine im Querschnitt symmetrische Form desjenigen Bereichs des Klemmkanals, der sich von den beiden Klemmflächen bis zu der Kanalöffnung erstreckt, ist auch bereits ohne das Merkmal der Parallelität der beiden Kanalwände von Vorteil, da derartige Klemmkanäle mit entsprechenden Klemmvorrichtungen invariant in Bezug auf die Drehrichtung des Druckzylinders sind und sowohl rechtsdrehend als auch linksdrehend betrieben werden können.A wall of the clamping channel forming the clamping surface advantageously extends as far as an opening of the clamping channel located on the outer periphery of the printing cylinder, at least substantially radially with respect to the axis of rotation or transversely to the circumferential direction of the printing cylinder. Preferably, this channel wall is flat. A radial or substantially radial extension allows the absorption of a Abbugs, which points to the adjacent, resting on the peripheral surface of the printing cylinder portion of the printing pad at a right angle. In preferred developments extends in the circumferential direction of the clamping surface facing on the other side of the clamping channel a same channel wall, which forms a further clamping surface for the other turn of the same pressure pad or the turn of another pressure pad and in particular may be parallel to the clamping surface. The invention further developing features of such pressure pads and clamping and opening areas of clamping channels are in the DE 10 2005 029 167 described. A symmetrical in cross-sectional shape of that portion of the clamping channel which extends from the two clamping surfaces to the channel opening, even without the feature of parallelism of the two channel walls advantageous since such clamping channels with corresponding clamping devices invariant with respect to the direction of rotation of the impression cylinder are and can be operated both clockwise and anti-clockwise.

Das Klemmstück weist in bevorzugten Ausführungen einen Lagerabschnitt und einen von dem Lagerabschnitt abragenden, im Querschnitt des Druckzylinders im Vergleich mit dem Lagerabschnitt schmalen Finger auf. Der Finger bildet den Klemmspalt, und der Lagerabschnitt dient vorteilhafterweise der Montage in dem Kanal, vorzugsweise der Kipplagerung des Klemmstücks. Vorzugsweise wird das z. B. einstückige Klemmstück z. B. mit seinem Lagerabschnitt an dem Druckzylinder, insbesondere dem Füllstück gelagert, d. h. insbesondere, dass das Klemmstück sich in einem Eingriff mit dem Druckzylinder befindet oder von dem Druckzylinder geführt wird. Die Montage umfasst vorzugsweise eine Befestigung des Klemmstücks, die dem Klemmstück allerdings die zur Erfüllung seiner Funktion erforderliche Bewegungsfreiheit lässt. Die Befestigung kann vorteilhafterweise ein Widerlager für das Federglied bilden oder das Klemmstück an einem Füllstück halten, solange das Füllstück noch nicht in eine passende Aussparung des Druckzylinders eingesetzt ist. Insbesondere kann sich das Federglied an dem Füllstück und dem Klemmstück oder an dem Befestigungsmittel und dem Klemmstück abstützen. Bevorzugt umgibt das Federglied das Befestigungsmittel, wobei zum Beispiel das Federglied von dem Klemmstück umgeben sein kann. Als Befestigungsmittel kann insbesondere ein Montagebolzen, vorzugsweise ein Schraubbolzen, dienen. Die Federkraft wirkt vorzugsweise in Längsrichtung des Montagebolzens.The clamping piece has in preferred embodiments, a bearing portion and a projecting from the bearing portion, in the cross section of the printing cylinder in comparison with the bearing portion narrow finger. The finger forms the nip, and the bearing portion is advantageously the assembly in the channel, preferably the tilting bearing of the clamping piece. Preferably, the z. B. integral clamping piece z. B. with its bearing portion on the printing cylinder, in particular the filler, d. H. in particular, that the clamping piece is in engagement with the printing cylinder or is guided by the printing cylinder. The assembly preferably comprises an attachment of the clamping piece, which leaves the clamping piece, however, the required freedom to perform its function. The attachment may advantageously form an abutment for the spring member or hold the clamping piece to a filler, as long as the filler is not yet inserted into a matching recess of the printing cylinder. In particular, the spring member may be supported on the filler and the clamping piece or on the fastening means and the clamping piece. Preferably, the spring member surrounds the attachment means, wherein, for example, the spring member may be surrounded by the clamping piece. As a fastening means, in particular a mounting bolt, preferably a bolt serve. The spring force preferably acts in the longitudinal direction of the mounting bolt.

In dem Klemmkanal ist zweckmäßigerweise ein weiteres Klemmstück angeordnet, mit dem der andere Abbug des gleichen Druckbelags oder ein Abbug eines weiteren Druckbelags geklemmt werden kann. Soweit nichts Gegenteiliges ausgesagt wird, gelten sämtliche Ausführungen für beide Klemmstücke gleichermaßen. Die Klemmvorrichtung ist somit auch hinsichtlich der Klemmstücke und deren Beweglichkeit in Bezug auf die vorlaufende und die nachlaufende Seite des Klemmkanals weitgehend symmetrisch gebildet. Ein Unterschied, auf den hingewiesen werden soll, ergibt sich in bevorzugten Ausführungen jedoch daraus, dass die Klemmstücke vorteilhafterweise auf der gleichen Seite des Klemmkanals montiert sind, die jeweilige Federkraft jedoch in unterschiedliche Richtungen, vorzugsweise in einander entgegengesetzte Richtungen auf die beiden Arten von Klemmstücken aufgebracht wird. Die Montage beider Arten von Klemmstücken auf der gleichen Seite des Klemmkanals, d.h. auf der in Umfangsrichtung der Druckzylinders gesehen gleichen Seite, vereinfacht die Fertigung und die Montage.In the clamping channel a further clamping piece is expediently arranged, with which the other Abbug the same pressure pad or a turn of another pressure pad can be clamped. Unless otherwise stated, all versions apply equally to both clamps. The clamping device is thus formed largely symmetrically with respect to the clamping pieces and their mobility with respect to the leading and the trailing side of the clamping channel. A difference to be pointed out results in preferred embodiments, however, from the fact that the clamping pieces are advantageously mounted on the same side of the clamping channel, but the respective spring force applied in different directions, preferably in opposite directions on the two types of clamping pieces becomes. The assembly of both types of clamping pieces on the same side of the clamping channel, ie on the same side seen in the circumferential direction of the printing cylinder, simplifies the manufacture and assembly.

Von Vorteil ist, wenn die axial im Klemmkanal versetzt zueinander angeordneten Klemmstücke einander in Umfangsrichtung des Druckzylinders überlappen. Die Klemmstücke oder zumindest die Bereiche der Klemmstücke, welche die Klemmspalte bilden, überlappen einander insbesondere, wenn kein Druckbelag geklemmt wird, also kein Abbug in einen der Klemmspalte der einander überlappenden Klemmstücke ragt. In Ausführungen, in denen die Klemmstücke die genannten Lagerabschnitte und die Klemmspalte bildenden Finger aufweisen, genügt es grundsätzlich, wenn nur die Finger einander überlappen, bevorzugter überlappen jedoch auch die Lagerabschnitte. Einander überlappende Klemmstücke sind insbesondere von Vorteil, wenn die Öffnung des Klemmkanals und der sich an die Öffnung radial einwärts anschließende Kanalbereich sehr schmal sind, beispielsweise 5 mm oder noch schmaler. Die überlappende Anordnung ermöglicht es, die Abschnitte der Klemmstücke, welche die Klemmspalte bilden, in Umfangsrichtung des Druckzylinders dicker und dadurch steifer auszuführen als dies bei einer Anordnung in Umfangsrichtung nebeneinander möglich ist.It is advantageous if the axially offset in the clamping channel to each other clamping pieces overlap each other in the circumferential direction of the printing cylinder. The clamping pieces or at least the areas of the clamping pieces which form the clamping gaps, overlap each other in particular, if no pressure pad is clamped, so no turning into one of the clamping gaps of the overlapping clamping pieces protrudes. In embodiments in which the clamping pieces have said bearing portions and the nip forming fingers, it is sufficient in principle, if only the fingers overlap each other, but more preferably also overlap the bearing portions. Mutually overlapping clamping pieces are particularly advantageous if the opening of the clamping channel and the channel region adjoining the opening radially inwardly are very narrow, for example 5 mm or even narrower. The overlapping arrangement makes it possible to make the portions of the clamping pieces, which form the clamping gaps, thicker and thus stiffer in the circumferential direction of the printing cylinder than is possible next to one another in the case of an arrangement in the circumferential direction.

Die Federglieder sind vorzugsweise mechanische Federn und können insbesondere auf Druck beanspruchte Spiralfedern bzw. Wendelfedern sein. Alternativ kommen auch pneumatische Federn in Frage. Falls für mehrere Klemmstücke ein gemeinsames Federglied verwendet wird, gilt dies auch für solch ein Federglied.The spring members are preferably mechanical springs and may be in particular spring-loaded coil springs or coil springs. Alternatively, pneumatic springs come into question. If a common spring member is used for several clamps, this also applies to such a spring member.

Der Druckzylinder ist bevorzugt ein Formzylinder, kann beispielsweise aber auch ein Drucktuchzylinder sein, wie sie beispielsweise aus dem Zeitungsoffsetdruck bekannt sind. Der Druckzylinder hat vorzugsweise doppelten Umfang. Gegebenenfalls hat er auch nur einfachen Umfang. Ist der Druckzylinder ein Drucktuchzylinder, kann er einen einzigen durchgehenden Klemmkanal oder mehrere axial zueinander versetzte Klemmkanäle aufweisen, die zueinander auch in Umfangsrichtung versetzt sind. Das Drucktuch oder die mehreren nebeneinander auf dem Drucktuchzylinder angeordneten Drucktücher umspannen in derartigen Ausführungformen den vollen Umfang des Zylinders. Eine Unterteilung in Umfangsrichtung ist allerdings ebenfalls denkbar. Handelt es sich bei dem Druckzylinder um einen Formzylinder, werden Ausführungen bevorzugt, bei denen der oder die Klemmkanäle sich axial über zumindest den größten Teil der Länge des Formzylinders durchgehend erstreckt oder erstrecken. So kann ein Formzylinder einfachen Umfangs insbesondere einen einzigen durchgehenden Kanal und ein Formzylinder doppelten Umfangs zwei durchgehende Kanäle mit einem Versatz zueinander von 180° in Umfangsrichtung aufweisen. Alternativ können jedoch auch bei einem Formzylinder axial zueinander versetzte Klemmkanäle vorgesehen sein, die auch in Umfangsrichtung zueinander versetzt sind. Ein Formzylinder von doppeltem Umfang kann beispielsweise axial nebeneinander zwei Gruppen von jeweils zwei Klemmkanälen aufweisen, wobei die Klemmkanäle innerhalb der jeweiligen Gruppe in Umfangsrichtung um 180° und die Klemmkanäle von Gruppe zu Gruppe um jeweils 90° zueinander versetzt sind.The printing cylinder is preferably a forme cylinder, but may for example also be a blanket cylinder, as are known, for example, from the newspaper offset printing. The printing cylinder preferably has twice the circumference. If necessary, he also has only a simple scope. If the printing cylinder is a blanket cylinder, it may have a single continuous clamping channel or a plurality of axially offset clamping channels, which are offset from one another in the circumferential direction. The blanket or the plurality of blankets arranged side by side on the blanket cylinder in such embodiments span the full circumference of the cylinder. However, a subdivision in the circumferential direction is also conceivable. If the pressure cylinder is a form cylinder, embodiments are preferred in which the one or more clamping channels extend or extend axially over at least the major part of the length of the forme cylinder. Thus, a forme cylinder simple circumference in particular a single continuous channel and a double-circumference form cylinder having two continuous channels with an offset from each other by 180 ° in the circumferential direction. Alternatively, however, axially offset clamping channels can also be provided in the case of a forme cylinder, which are offset from one another in the circumferential direction. A forme cylinder of twice the circumference may, for example, have two groups of two clamping channels axially next to one another, wherein the clamping channels within the respective group are offset by 180 ° in the circumferential direction and the clamping channels are offset from one another by 90 ° from one group to the next.

Bevorzugte Merkmale werden auch in den Unteransprüchen und deren Kombinationen beschrieben.Preferred features are also described in the subclaims and their combinations.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand von Figuren erläutert. An dem Ausführungsbeispiel offenbar werdende Merkmale bilden je einzeln und in jeder Kombination die Gegenstände der Ansprüche und auch die vorstehend beschriebenen Ausgestaltungen vorteilhaft weiter. Es zeigen:

Figur 1
einen Klemmkanal in einem Querschnitt und
Figur 2
den Klemmkanal in einem anderen Querschnitt.
Hereinafter, an embodiment of the invention will be explained with reference to figures. The features disclosed in the exemplary embodiment each individually and in any combination advantageously further extend the subject-matter of the claims and also the embodiments described above. Show it:
FIG. 1
a clamping channel in a cross section and
FIG. 2
the clamping channel in a different cross section.

Die Figuren 1 und 2 zeigen einen Formzylinder 1 einer Rollenrotations-Offsetdruckmaschine für den Zeitungsdruck in je einem anderen Querschnitt. Der Formzylinder 1 hat einen doppelten Umfang, d.h. an dem Umfang des Formzylinders 1 sind in Umfangsrichtung hintereinander zwei Druckformen 2 und 4 angeordnet und mittels zwei Klemmvorrichtungen geklemmt, die in zwei Klemmkanälen angeordnet sind. Die Klemmkanäle erstrecken sich je über die gesamte axiale Länge des Formzylinders 1 durchgehend und sind zueinander in Umfangsrichtung um 180° versetzt. Der Formzylinder 1 kann insbesondere vier oder sechs Zeitungsseiten breit sein. Die Druckformen 2 und 4 weisen an ihren in Drehrichtung V vorlaufenden und nachlaufenden Enden jeweils einen Abbug auf, der in einem der beiden Klemmkanäle klemmend gehalten wird. In dem in den Figuren 1 und 2 dargestellten Klemmkanal werden der vorlaufende Abbug 3 der Druckform 2 und der nachlaufende Abbug 5 der Druckform 4 geklemmt. Die Abbüge 3 und 5 sind zu dem auf dem Umfang des Formzylinders 1 aufliegenden, sich an den Abbug 3 oder 5 anschließenden Bereich der jeweiligen Druckform 2 oder 4 im rechten Winkel abgebogen. Die Druckformen 2 und 4 sind zwar so flexibel, dass sie sich im geklemmten Zustand an die gekrümmte Umfangsfläche des Formzylinders 1 anlegen, andererseits sind sie jedoch so steif, dass die Abbüge 3 und 5 in Bezug auf die Abwinkelung steif sind.The Figures 1 and 2 show a forme cylinder 1 of a web-fed rotary offset printing press in each case a different cross-section. The forme cylinder 1 has a double circumference, ie at the periphery of the forme cylinder 1 in the circumferential direction two printing plates 2 and 4 are arranged in succession and clamped by two clamping devices which are arranged in two clamping channels. The clamping channels each extend continuously over the entire axial length of the forme cylinder 1 and are mutually offset in the circumferential direction by 180 °. The forme cylinder 1 can in particular be four or six newspaper pages wide. The printing plates 2 and 4 have at their leading in the direction of rotation V and trailing ends each a turn on, which is clamped in one of the two clamping channels. In the in the Figures 1 and 2 illustrated clamping channel of the leading Abbug 3 of the printing plate 2 and the trailing Abbug 5 of the printing plate 4 are clamped. The bevels 3 and 5 are to the resting on the circumference of the forme cylinder 1, adjoining the turn 3 or 5 area of the respective printing forme 2 or 4 bent at right angles. Although the printing plates 2 and 4 are so flexible that they rest in the clamped state on the curved peripheral surface of the forme cylinder 1, but on the other hand, they are so stiff that the bends 3 and 5 are stiff with respect to the angulation.

Die Klemmvorrichtung umfasst mehrere erste Klemmstücke 11, die in Achsrichtung des Formzylinders 1 nebeneinander in dem Klemmkanal angeordnet sind und mittels denen die nebeneinander auf dem Formzylinder 1 angeordneten Druckformen 2 an ihren vorlaufenden Abbügen 3 geklemmt werden können. Die Klemmvorrichtung umfasst ferner mehrere zweite Klemmstücke 12, die ebenfalls in Abständen axial nebeneinander in dem Klemmkanal angeordnet sind und mittels denen die auf dem Formzylinder 1 nebeneinander angeordneten Druckformen 4 an ihren nachlaufenden Abbügen 5 geklemmt werden können. In Figur 1 ist eines der ersten Klemmstücke 11 und in Figur 2 ist eines der zweiten Klemmstücke 12 dargestellt. Die Klemmstücke 11 und 12 sind in Achsrichtung des Formzylinders 1 alternierend und jeweils in einem Abstand zueinander angeordnet und so gelagert, dass jedes der Klemmstücke 11 und 12 unabhängig von jedem anderen die für das Klemmen erforderliche Bewegung ausführen kann. Pro Druckform 2 und 4 sind jeweils zwei erste Klemmstücke 11 für den vorlaufenden Abbug 3 und zwei zweite Klemmstücke 12 für den nachlaufenden Abbug 5 vorgesehen. Jedes der Klemmstücke 11 und 12 bildet jeweils nur einen einzigen Klemmspalt F. Die Klemmstücke 11 und 12 sind im Vergleich zu den Druckformen 2 und 4 sehr schmal; vorzugsweise ist ihre in Achsrichtung gemessene Breite maximal ein Zehntel, bevorzugter maximal ein Zwanzigstel der Breite der einfach breiten Druckformen 2 und 4.The clamping device comprises a plurality of first clamping pieces 11, which are arranged in the axial direction of the forme cylinder 1 side by side in the clamping channel and by means of which the side by side on the forme cylinder 1 arranged printing plates 2 can be clamped at their leading turns 3. The clamping device further comprises a plurality of second clamping pieces 12, which are also arranged at intervals axially adjacent to each other in the clamping channel and by means of which on the forme cylinder 1 juxtaposed printing plates 4 can be clamped at their trailing turns 5. In FIG. 1 is one of the first clamping pieces 11 and in FIG. 2 one of the second clamping pieces 12 is shown. The clamping pieces 11 and 12 are arranged alternately in the axial direction of the forme cylinder 1 and in each case at a distance from each other and stored so that each of the clamping pieces 11 and 12 can independently perform the movement required for the clamping of each other. For each printing form 2 and 4 two first clamping pieces 11 are provided for the leading Abbug 3 and two second clamping pieces 12 for the trailing Abbug 5. Each of the clamping pieces 11 and 12 forms only a single nip F. The clamping pieces 11 and 12 are compared to the printing plates 2 and 4 is very narrow; Preferably, its width measured in the axial direction is at most one tenth, more preferably at most one twentieth of the width of the single-wide printing plates 2 and 4.

Die Klemmstücke 11 und 12 sind an einem Füllstück 8 montiert, das in einer Aussparung des Formzylinders 1 eingesetzt und mit dem Formzylinder 1 ortsfest und unbeweglich verbunden ist. Das Füllstück 8 bildet einen kurzen Bogenabschnitt der äußeren Umfangsfläche des Formzylinders 1. Soweit nicht die Montage der Klemmvorrichtung betroffen ist, kann das Füllstück 8 als zum Formzylinder 1 gehörig betrachtet werden.The clamping pieces 11 and 12 are mounted on a filler 8, which is inserted in a recess of the forme cylinder 1 and fixed to the forme cylinder 1 and immovably connected. The filler 8 forms a short arc portion of the outer peripheral surface of the forme cylinder 1. Unless the assembly of the clamping device is concerned, the filler 8 can be considered as belonging to the forme cylinder 1.

Der Klemmkanal weist am äußeren Umfang des Formzylinders 1 eine axial gerade, schlitzförmige Kanalöffnung auf, durch welche die Abbüge 3 und 5 in den Klemmkanal ragen. An die Kanalöffnung schließen sich eine vorlaufende Kanalwand 1a und eine nachlaufenden Kanalwand 1b an. Die Klemmstücke 11 bilden mit der vorlaufenden Kanalwand 1a je einen Klemmspalt F für die vorlaufenden Abzüge 3. Die Klemmstücke 12 bilden für die nachlaufenden Abbüge 5 je einen Klemmspalt F mit der nachlaufenden Kanalwand 1b. Die Kanalwände 1a und 1b bilden somit die Gegenflächen oder Klemmflächen für die Klemmstücke 11 und 12. Die Kanalwände 1a und 1b erstrecken sich von der Kanalöffnung bis wenigstens zu dem jeweiligen Klemmspalt F planparallel zu einer Axial/Radial-Ebene auf die Drehachse des Formzylinders 1. Da sie nur um einige Millimeter voneinander beabstandet sind, können Sie selbst in guter Näherung ebenfalls als Axial/Radial-Ebenen bezeichnet werden. Im Ausführungsbeispiel erstrecken sie sich nach radial einwärts auch noch ein Stück weit über den jeweiligen Klemmspalt F hinaus zueinander planparallel. Radial einwärts von dem schmalen Spalt zwischen den Kanalwänden 1a und 1b öffnet sich der Klemmkanal zu einem Aufnahmeraum für die Lagerung und Montage der Klemmstücke 11 und 12.The clamping channel has on the outer circumference of the forme cylinder 1 an axially straight, slot-shaped channel opening through which the bends 3 and 5 protrude into the clamping channel. Close to the channel opening, a leading channel wall 1a and a trailing channel wall 1b. The clamping pieces 11 form with the leading channel wall 1a depending on a nip F for the leading prints 3. The clamping pieces 12 form for the trailing turns 5 each have a nip F with the trailing channel wall 1b. The channel walls 1a and 1b thus form the mating surfaces or clamping surfaces for the clamping pieces 11 and 12. The channel walls 1a and 1b extend from the channel opening to at least the respective nip F plane parallel to an axial / radial plane on the axis of rotation of the forme cylinder first Since they are only a few millimeters apart, you can also, in a good approximation, also be referred to as axial / radial planes. In the exemplary embodiment, they also extend radially inward even beyond the respective clamping gap F to each other plane-parallel. Radially inwardly from the narrow gap between the channel walls 1a and 1b, the clamping channel opens to a receiving space for the storage and assembly of the clamping pieces 11 and 12th

Die Klemmstücke 11 sind untereinander gleich, und sie sind auf gleiche Weise montiert und für das Klemmen beweglich gelagert. Ausführungen nur zu einem der Klemmstücke 11 gelten somit für die weiteren Klemmstücke 11 gleichermaßen. Das Klemmstück 11 besteht aus einem Lagerabschnitt 13, der in dem Aufnahmeraum des Klemmkanals aufgenommen ist und von dessen Wänden umgeben wird, und einem Finger 14, der von dem Lagerabschnitt 13 nach außen in Richtung auf die Kanalöffnung abragt und in den Spalt zwischen den Kanalwänden 1a und 1b hineinragt. Der Finger 14 bildet mit der Kanalwand 1a den Klemmspalt F. Der Finger 14 verjüngt sich von dem Klemmspalt F aus in Richtung auf die Kanalöffnung, so dass ein Einführtrichter für den Abbug 3 entsteht. Im Ausführungsbeispiel weist er von seinem äußeren Ende in Richtung auf den Klemmspalt F eine konstante Neigung auf.The clamping pieces 11 are equal to each other, and they are mounted in the same way and movably mounted for clamping. Designs only one of the clamping pieces 11 thus apply equally to the other clamping pieces 11. The clamping piece 11 consists of a bearing portion 13 which is received in the receiving space of the clamping channel and is surrounded by the walls thereof, and a finger 14 which protrudes from the bearing portion 13 outwardly toward the channel opening and into the gap between the channel walls 1a and 1b protrudes. The finger 14 forms with the channel wall 1 a the nip F. The finger 14 tapers from the nip F in the direction of the channel opening, so that an insertion funnel for the Abbug 3 is formed. In the exemplary embodiment, it has a constant inclination from its outer end in the direction of the clamping gap F.

Das Klemmstück 11 ist in der Querschnittsebene um eine Kippachse R im Ganzen kippbar. Die Kippachse R entsteht durch einen Druckkontakt des Klemmstücks 11 mit einer Lagerstelle, im Ausführungsbeispiel eine axial gerade Kante, die in Bezug auf die Drehachse des Formzylinders 1 radial einwärts von dem Klemmspalt F an einer Kanalwand 1 c des Aufnahmeraums gebildet ist. Die Kanalwand 1c bildet einen Boden des Klemmkanals. In die Kanalwand 1c ist axial durchgehend eine Vertiefung 18, im Ausführungsbeispiel eine Rechtecknut, eingearbeitet. Die Lagerstelle wird von einem der beiden äußeren Ränder der Vertiefung 18 gebildet. Die Ränder sind je als eine Kante geformt. Das Klemmstück 11 weist entsprechend eine Lagerfläche auf, mit der es gegen die im Klemmkanal gebildete Lagerstelle drückt.The clamping piece 11 is tiltable in the cross-sectional plane about a tilt axis R as a whole. The tilting axis R is formed by a pressure contact of the clamping piece 11 with a bearing point, in the embodiment an axially straight edge, which is formed with respect to the axis of rotation of the forme cylinder 1 radially inwardly of the nip F on a channel wall 1 c of the receiving space. The channel wall 1c forms a bottom of the clamping channel. In the channel wall 1c is axially continuous recess 18, in the embodiment, a rectangular groove, incorporated. The bearing point is from one of the two outer edges of the recess 18th educated. The edges are each shaped as an edge. The clamping piece 11 has a corresponding bearing surface, with which it presses against the bearing point formed in the clamping channel.

Um im Klemmspalt F die zum Klemmen des Abbugs 3 erforderliche Klemmkraft zu erzeugen, wird das Klemmglied 11 von einem vorgespannten Federglied 7 mit einer Federkraft beaufschlagt, die den Finger 14 in Richtung auf die Kanalwand 1a zu spannt. Das Federglied 7 ist eine auf Druck beanspruchte Spiralfeder. Jedem der Klemmstücke 11 ist jeweils ein eigenes Federglied 7 zugeordnet, das jeweils nur auf das zugeordnete Klemmstück 11 wirkt. Das Federglied 7 drückt das Klemmstück 11 ferner gegen die Lagerstelle. Die Federachse des Federglieds 7 erstreckt sich rechtwinklig zu der Kanalwand 1a. Eine Schrägstellung wäre zwar weniger bevorzugt, aber dennoch möglich.In order to generate the clamping force required for clamping the Abbugs 3 in the nip F, the clamping member 11 is acted upon by a prestressed spring member 7 with a spring force which biases the finger 14 in the direction of the channel wall 1a. The spring member 7 is a loaded on compression coil spring. Each of the clamping pieces 11 is assigned in each case its own spring member 7, which acts in each case only on the associated clamping piece 11. The spring member 7 presses the clamping piece 11 further against the bearing point. The spring axis of the spring member 7 extends at right angles to the channel wall 1a. An inclination would be less preferred, but still possible.

Die von dem Federglied 7 auf das Klemmstück 11 ausgeübte Federkraft wirkt im wesentlichen in die gleiche Richtung wie die von dem Klemmstück 11 auf die Lagerstelle ausgeübte Druckkraft. Das Klemmstück 11 kontaktiert die Lagerstelle mit einer äußeren Oberfläche, die im wesentlichen in die gleiche Richtung wie diejenige Fläche weist, mit der das Klemmstück 11 den Klemmspalt F bildet. Dies bedeutet allerdings nicht, dass die beiden betreffenden Flächen, nämlich die Klemmfläche und die Lagerfläche des Klemmstücks 11, planparallel oder nur parallel sein müssten, die jeweiligen Flächennormalen müssen nur eine ausreichend große Richtungskomponente mit der Federkraft gemeinsam haben, so dass durch die gleiche Federkraft zum einen die Lagerfläche des Klemmstücks 11 gegen die Lagerstelle des Klemmkanals und die Klemmfläche des Klemmstücks 11 in Richtung auf die von der Kanalwand 1a gebildete Klemmfläche gedrückt werden.The force exerted by the spring member 7 on the clamping piece 11 spring force acts substantially in the same direction as the force exerted by the clamping piece 11 on the bearing pressure. The clamping piece 11 contacts the bearing with an outer surface which faces in substantially the same direction as that surface with which the clamping piece 11 forms the nip F. However, this does not mean that the two surfaces in question, namely the clamping surface and the bearing surface of the clamping piece 11, should be plane-parallel or only parallel, the respective surface normals have only a sufficiently large direction component in common with the spring force, so that by the same spring force to a the bearing surface of the clamping piece 11 against the bearing point of the clamping channel and the clamping surface of the clamping piece 11 are pressed in the direction of the clamping surface formed by the channel wall 1 a.

Das Klemmstück 11 ist mittels eines Montagebolzens 9, der im Ausführungsbeispiel als Schraubbolzen ausgeführt ist, an der Seite des Klemmkanals montiert, an der auch die Kanalwand 1a geformt ist. Der Montagebolzen 9 weist eine Schulter auf, an der sich das Federglied 7 abstützt. Längs der Federachse des Federglieds 7 der Schulter des Montagebolzens 9 gegenüberliegend weist das Klemmstück 11 einen Steg 15 auf, an dem sich das Federglied 7 ebenfalls abstützt. Das Federglied 7 ist auf diese Weise zwischen dem Montagebolzen 9 und dem Klemmstück 11 gespannt und drückt das Klemmstück 11 in Richtung seiner Federachse und somit den Finger 14 in Richtung auf die Kanalwand 1a, wodurch die für das Klemmen des Abbugs 3 im Klemmspalt F erforderliche Klemmkraft erzeugt wird. Der Montagebolzen 9 weist rechtwinklig zu der Axial/Radial-Ebene des Formzylinders 1, die sich mittig zwischen den beiden Rändern der Kanalöffnung erstreckt.The clamping piece 11 is mounted by means of a mounting bolt 9, which is designed in the embodiment as a bolt on the side of the clamping channel on which the channel wall 1 a is formed. The mounting bolt 9 has a shoulder on which the spring member 7 is supported. Along the spring axis of the spring member 7 of the shoulder of the mounting bolt 9 opposite the clamping piece 11 has a web 15 on which the spring member 7 is also supported. The spring member 7 is stretched in this way between the mounting bolt 9 and the clamping piece 11 and pushes the clamping piece 11 in the direction of its spring axis and thus the finger 14 in the direction of the channel wall 1a, whereby the for clamping of the Abbugs 3 in the nip F required clamping force is generated. The mounting bolt 9 is perpendicular to the axial / radial plane of the forme cylinder 1, which extends centrally between the two edges of the channel opening.

Sämtliche Klemmstücke 11 und 12 ragen je mit einem Vorsprung 16 in die Vertiefung 18 und bilden mit einem der beiden Ränder der Vertiefung 18 das Kipplager für das jeweilige Klemmstück 11 oder 12. Das Federglied 7 wirkt auf den sich von der Kippachse R zu dem Klemmspalt F erstreckenden, als gerade Linie gedachten Kipphebel zwischen der Kippachse R und dem Klemmspalt F. Hierdurch wird eine Übersetzung erhalten, indem der Federweg des Federglieds 7 kleiner ist als der Bogen, den der Finger 14 bei einer Kippbewegung zurücklegt. Die Federachse weist rechtwinklig zu dem Kipphebel. Eine Schrägstellung wäre jedoch ebenfalls möglich. Für das Klemmstück 11 wird bevorzugt, dass es den Rand der Vertiefung 18, der das Kipplager für das Klemmstück 11 bildet, mit einem konkaven Abschnitt umgreift. Der konkave Abschnitt weist eine Innenkante auf, die von zwei in einem stumpfen Winkel aufeinander stehenden Flächen gebildet wird. Eine der Flächen wird von dem Vorsprung 16 und die andere der Flächen wird von dem Lagerabschnitt 13 gebildet.All of the clamping pieces 11 and 12 each protrude with a projection 16 in the recess 18 and form with one of the two edges of the recess 18, the tilting bearing for the respective clamping piece 11 or 12. The spring member 7 acts on the tilting of the axis R to the nip F extending, conceived as a straight line rocker between the tilting axis R and the nip F. This results in a translation obtained by the spring travel of the spring member 7 is smaller than the arc, the fingers 14 travels in a tilting movement. The spring axis is perpendicular to the rocker arm. However, an inclination would also be possible. For the clamping piece 11 is preferred that it surrounds the edge of the recess 18 which forms the tilting bearing for the clamping piece 11, with a concave portion. The concave portion has an inner edge formed by two surfaces at an obtuse angle. One of the surfaces is formed by the projection 16 and the other of the surfaces is formed by the bearing portion 13.

Der Vorsprung 16 ist im Querschnitt konisch zu seinem freien Ende verjüngt. Die Lagerfläche des Klemmstücks 11, welche die Lagerstelle des Klemmkanals kontaktiert, ist daher in Bezug auf die Federachse einfach als schiefe Ebene, d. h. als Ebene mit konstanter Neigung, geformt. Die Kipplagerung ist auf diese Weise in der Art einer Wippe gebildet. Anstatt die Federkraft wie bevorzugt zwischen der Kippachse R und dem Klemmspalt F in das Klemmstück 11 einzuleiten, könnte bei gleicher Form des Klemmstücks 11 die Kippachse auch in einem Bereich des Fingers 14 nahe bei dem Lagerabschnitt 13 gebildet sein, im Ausführungsbeispiel an der radial inneren Kante der Kanalwand 1a. Solch eine Anordnung entspräche unmittelbar einer Wippe.The projection 16 is tapered in cross-section conical to its free end. The bearing surface of the clamping piece 11, which contacts the bearing point of the clamping channel is therefore in relation to the spring axis simply as an inclined plane, d. H. as a plane with constant slope, shaped. The tilting bearing is formed in this way in the manner of a rocker. Instead of introducing the spring force as preferred between the tilting axis R and the nip F in the clamping piece 11, the tilting axis could be formed in a region of the finger 14 near the bearing portion 13 in the same shape of the clamping piece 11, in the embodiment at the radially inner edge the channel wall 1a. Such an arrangement would correspond directly to a rocker.

Der Lagerabschnitt 13 bildet einen U-förmigen Bügel, der den Finger 14 steif mit dem Vorsprung 16 verbindet. Die Federachse des Federglieds 7 und die Längsachse des Montagebolzens 9 weisen zu den beiden Schenkeln des Bügels parallel. Der Montagebolzen 9 durchragt für die Befestigung am Füllstück 8 den Steg 15, der den Boden des Bügels bildet. Der Finger 14 ragt von dem radial äußeren Schenkel des Bügels nach außen vor, und der Vorsprung 16 ragt von dem inneren Schenkel des Bügels nach radial innen vor. Der Finger 14 und der Vorsprung 16 ragen von dem freien, von dem Boden des Bügels abgewandten Ende des jeweiligen Schenkels und bezogen auf die beiden Schenkel auf gleicher Höhe ab. Die Kippachse R ist daher zumindest in guter Näherung radial unter dem Klemmspalt F gebildet. Entsprechend erstreckt sich der Kipphebel zwischen der Kippachse R und dem Klemmspalt F in gerader Verlängerung zu der Kanalwand 1a, so dass ein den Klemmspalt F bildender Flächenbereich des Fingers 14 von der den Klemmspalt F mitbildenden Klemmfläche der Kanalwand 1a beim Einstecken des Abbugs im wesentlichen im rechten Winkel wegkippt.The bearing portion 13 forms a U-shaped bracket which connects the finger 14 rigidly with the projection 16. The spring axis of the spring member 7 and the longitudinal axis of the mounting bolt 9 are parallel to the two legs of the bracket. The mounting bolt 9 penetrates for attachment to the filler 8 the web 15, which forms the bottom of the bracket. The finger 14 projects from the radially outer leg of the bracket outward, and the projection 16 protrudes from the inner leg of the bracket radially inward. The finger 14 and the projection 16 protrude from the free, remote from the bottom of the bracket end of the respective leg and based on the two legs at the same height. The tilting axis R is therefore formed at least to a good approximation radially below the clamping gap F. Accordingly, the rocker arm between the tilting axis R and the nip F extends in straight extension to the channel wall 1a, so that a clamping gap F forming surface area of the finger 14 of the clamping gap F co-forming clamping surface of the channel wall 1a at the insertion of the Abbugugs in the right Angle tilts.

Der Lagerabschnitt 13 ist in dem Aufnahmeraum zwischen zwei in radialer Richtung einander gegenüberliegenden Wänden 1d mit einem geringen Spiel eingefasst. Das Spiel ist so gewählt, dass der Ort des Klemmspalts F präzise vorgegeben ist, andererseits jedoch die Kippbewegungen nicht behindert werden. Das Spiel ist höchstens 0.1 mm, vorzugsweise beträgt es nur wenige Hundertstel Millimeter. Der Aufnahmeraum erstreckt sich in Bezug auf die Klemmfläche der vorlaufenden Kanalwand 1a unter das Niveau der Klemmfläche. Gleichzeitig könnte der Aufnahmeraum sich alternativ unter das Niveau der Klemmfläche der nachlaufenden Kanalwand 1b erstrecken. Die den Aufnahmeraum bildenden Wände 1d stehen vorzugsweise in etwa senkrecht auf die Kanalwand 1a, d. h. zum Beispiel mit einer Toleranz von can ± 20°, bevorzugter ± 10°. Die Wände 1d sind vorteilhaft parallel zueinander. Des Weiteren ist der Lagerabschnitt 13 in seinem Bügelbereich zu seiner von dem Finger 14 abgewandten Seite hin, d. h. zu einer Kanalwand 1e hin, verjüngt, so dass der Bügel die Kippbewegungen nicht behindern kann. Die Kanalwand 1e ist vorzugsweise in etwa parallel zu der vorlaufenden oder nachlaufenden Kanalwand 1a, 1b und alternativ oder zusätzlich in etwa senkrecht zu den Wänden 1d.The bearing portion 13 is enclosed in the receiving space between two radially opposite walls 1d with a small clearance. The game is chosen so that the location of the clamping gap F is precisely predetermined, on the other hand, however, the tilting movements are not hindered. The game is at most 0.1 mm, preferably it is only a few hundredths of a millimeter. The receiving space extends with respect to the clamping surface of the leading channel wall 1a below the level of the clamping surface. At the same time, the receiving space could alternatively extend below the level of the clamping surface of the trailing channel wall 1b. The walls 1d forming the receiving space are preferably approximately perpendicular to the channel wall 1a, d. H. for example with a tolerance of can ± 20 °, more preferably ± 10 °. The walls 1d are advantageously parallel to each other. Furthermore, the bearing portion 13 is in its bow portion to its side facing away from the finger 14 side, d. H. towards a channel wall 1e, tapered, so that the bracket can not hinder the tilting movements. The channel wall 1e is preferably approximately parallel to the leading or trailing channel wall 1a, 1b and, alternatively or additionally, approximately perpendicular to the walls 1d.

Der Montagebolzen 9 wird von dem Steg 15 des Klemmstücks 11 eingefasst. Auch für diese von dem Steg 15 gebildete Einfassung gilt, dass sie gerade so viel Spiel aufweist, dass die Kippbewegungen des Klemmstücks 11 nicht behindert werden. Die beiden Einfassungen, nämlich zum einen die Einfassung durch die Kanalwände 1d und zum anderen die Einfassung des Montagebolzens 9, sind im Ausführungsbeispiel in Kombination verwirklicht. Grundsätzlich würde auch eine der beiden Einfassungen genügen, insbesondere bei dem Klemmstück 12, das den Montagebolzen 9 nahe bei dem Kipphebel mittels eines Stegs 17 einfasst.The mounting bolt 9 is bordered by the web 15 of the clamping piece 11. It is also true for these edging formed by the web 15 that it has just enough play that the tilting movements of the clamping piece 11 are not obstructed. The two enclosures, namely on the one hand, the enclosure through the channel walls 1d and on the other the enclosure of the mounting bolt 9, are realized in combination in the embodiment. In principle, one of the two enclosures would be sufficient, in particular in the clamping piece 12, which surrounds the mounting bolt 9 close to the rocker arm by means of a web 17.

Das Klemmstück 12 unterscheidet sich von dem Klemmstück 11 nur in Bezug auf die Richtung, in welcher das zugeordnete Federglied 7 auf das Klemmstück 12 wirkt. Da das Klemmstück 12 auf der gleichen Seite des Klemmkanals wie das Klemmstück 11 montiert ist, nämlich am Füllstück 8, der Finger 14 des Klemmstücks 12 jedoch den Klemmspalt mit der gegenüberliegenden, nachlaufenden Kanalwand 1b bildet, kann sich das Federglied 7 unmittelbar an der Kanalwand 1e abstützen. Das Federglied 7 wirkt auf den Steg 17, der die vom Bügel des Klemmstücks 11 nur noch verbliebenen Schenkel miteinander verbindet. Der Montagebolzen 9 ragt durch den Steg 17 hindurch, wie bereits durch den Steg 15 des Klemmstücks 11.The clamping piece 12 differs from the clamping piece 11 only with respect to the direction in which the associated spring member 7 acts on the clamping piece 12. Since the clamping piece 12 is mounted on the same side of the clamping channel as the clamping piece 11, namely on the filler 8, the finger 14 of the clamping piece 12, however, forms the clamping gap with the opposite, trailing channel wall 1b, the spring member 7 can directly on the channel wall 1e support. The spring member 7 acts on the web 17, which connects the only remaining leg of the bracket 11 of the clamping piece with each other. The mounting bolt 9 protrudes through the web 17, as already through the web 15 of the clamping piece eleventh

In dem Klemmkanal sind wie bereits erwähnt jeweils in Abständen zueinander versetzt mehrere der Klemmstücke 11 und mehrere der Klemmstücke 12 in alternierender Folge angeordnet. Dabei ist jeweils eines der Klemmstücke 11 dicht neben einem der Klemmstücke 12 angeordnet, und zwischen den so der Anordnung nach gebildeten Paaren verbleibt jeweils ein größerer Abstand.As already mentioned, a plurality of the clamping pieces 11 and a plurality of the clamping pieces 12 are arranged in alternating succession at intervals with respect to each other in the clamping channel. In this case, each one of the clamping pieces 11 is arranged close to one of the clamping pieces 12, and between the arrangement according to the pairs formed in each case remains a greater distance.

Die Finger 14 der im gleichen Klemmkanal angeordneten Klemmstücke 11 und 12 überlappen einander in Umfangsrichtung des Formzylinders, d. h. sie liegen in einer axialen Flucht. Sie überlappen einander zu einem größeren Teil, vorzugsweise zum überwiegenden Teil, in beiden extremen Kippstellungen, d. h. sowohl in der Kippstellung, die sie vor dem Einstecken des zugeordneten Abbugs 3 oder 5 einnehmen, als auch in der Kippstellung, die sie einnehmen, wenn der zugeordnete Abbug 3 oder 5 geklemmt wird. Auf diese Weise wird der in Umfangsrichtung schmale Raum, der zwischen den Kanalwänden 1a und 1b verbleibt, im Sinne einer größtmöglichen Steifigkeit der Klemmstücke 11 und 12 genutzt.The fingers 14 arranged in the same clamping channel clamping pieces 11 and 12 overlap each other in the circumferential direction of the forme cylinder, d. H. they are in an axial flight. They overlap each other to a greater extent, preferably for the most part, in both extreme tilt positions, d. H. both in the tilted position that they occupy prior to insertion of the associated Abbugs 3 or 5, as well as in the tilted position they take when the assigned Abbug 3 or 5 is clamped. In this way, the narrow space in the circumferential direction, which remains between the channel walls 1a and 1b, in the sense of maximum rigidity of the clamping pieces 11 and 12 is used.

Die Abbüge 3 sind den nichtklemmenden Klemmstücken 12 und die Abbüge 5 sind den nichtklemmenden Klemmstücken 12 gegenüberliegend jeweils mit einer Aussparung 6 versehen. Beim Klemmen des jeweils zugeordneten Abbugs, beispielsweise beim Klemmen des Abbugs 3 durch die Klemmstücke 11, werden die Klemmstücke 11 in dem Bereich der jeweils gegenüberliegenden Aussparung 6 bis nahezu gegen die Kanalwand 1b gekippt. Auch diese Maßnahme trägt dazu bei, dass die Finger 14 so dick als möglich und somit die Klemmstücke 11 und 12 so steif als möglich ausgerührt werden können. Im Umkehrschluss können die Kanalwände 1a und 1b sehr nahe aneinander rücken und die Kanalöffnung besonders schmal werden.The bends 3 are the non-clamping clamping pieces 12 and the bends 5 are the non-clamping clamping pieces 12 opposite each provided with a recess 6. When clamping the respectively associated Abbugs, for example when clamping the Abbugs 3 by the clamping pieces 11, the clamping pieces 11 are tilted in the region of the respective opposite recess 6 to almost against the channel wall 1b. This measure also contributes to the fact that the fingers 14 are as thick as possible and thus the clamping pieces 11 and 12 can be stirred as stiff as possible. Conversely, can the channel walls 1a and 1b move very close to each other and the channel opening are particularly narrow.

Die Klemmvorrichtung ermöglicht einen raschen Wechsel von Druckformen 2 und 4 auf einfache Weise.The clamping device allows a quick change of printing plates 2 and 4 in a simple manner.

Für den Wechsel beispielsweise der Druckform 2 wird die Druckform 2 der abgelaufenen Produktion an einem ihrer beiden Enden, beispielsweise dem vorlaufenden Ende, aufgenommen, vorzugsweise mittels Saugkraft. Die Druckform 2 wird an dem betreffenden Ende angehoben und dadurch der Abbug 3 aus dem Klemmspalt F gezogen. Sobald das freie vordere Ende des Abbugs 3 den Klemmspalt F passiert hat, kippt das Klemmstück 11 aufgrund der Federkraft gegen die Kanalwand 1a. Anschließend wird der nachlaufende Abbug der Druckform 2 aus dem im gegenüberliegenden Klemmkanal gebildeten Klemmspalt gezogen und die gebrauchte Druckform 2 abtransportiert.For example, the printing forme 2, the printing plate 2 of the expired production at one of its two ends, for example, the leading end, recorded, preferably by suction. The printing plate 2 is raised at the respective end and thereby pulled the Abbug 3 from the nip F. As soon as the free front end of the Abbugs 3 has passed the nip F, the clamping piece 11 tilts against the channel wall 1a due to the spring force. Subsequently, the trailing Abbug the printing plate 2 is pulled out of the nip formed in the opposite clamping channel and the used printing form 2 transported away.

Eine neue Druckform 2 für die nächste Produktion wird mit einem ihrer beiden Abbüge in den zugeordneten Klemmkanal eingeführt. Beispielhaft sei angenommen, dass sie mit dem Abbug 3 in den Klemmkanal 1a-1e eingeführt wird. Der Abbug 3 wird in dem mittels des Fingers 14 gebildeten Einführtrichters in Richtung auf den Grund des Einführtrichters und somit in Richtung auf den Klemmspalt F geführt und schließlich durch Druck in den Klemmspalt F eingesteckt. Dies erfolgt im Rahmen einer kontinuierlichen Einführbewegung des kurzen Abbugs 3.A new printing plate 2 for the next production is introduced with one of its two turns in the associated clamping channel. By way of example, assume that it is introduced with the bend 3 in the clamping channel 1a-1e. The Abbug 3 is guided in the insertion funnel formed by the finger 14 in the direction of the bottom of the insertion funnel and thus in the direction of the nip F and finally inserted by pressure in the nip F. This is done in the context of a continuous insertion movement of the short Abbüg 3.

Der Abbug 3, und auch die weiteren Abbüge der Druckformen 2 und 4, weist eine längs der Kanalwand 1a gemessene Höhe von vorzugsweise höchstens 10 mm, bevorzugter höchstens 9 mm auf. Bei dem Einführen in den Klemmkanal gelangt er zunächst in Eingriff mit einer in dem Klemmkanal angeordneten Registereinrichtung für das seitliche Ausrichten der Druckformen 2 und 4. Die Registereinrichtung umfasst pro Druckform 2 und 4 wenigstens einen Registernocken, vorzugsweise genau einen Registernocken, und sorgt in an sich bekannter Weise für die Einstellung des Seitenregisters. Die Druckform 2 gelangt erst nach der auf diese Weise erfolgenden Einstellung des Seitenregisters in den Klemmspalt F, d. h. zum Klemmen des Abbugs 3 steht nur dessen vorderster Bereich zur Verfügung. Umso mehr kommt es darauf an, dass ein Sollabstand zwischen dem umfangseitigen Rand des Klemmkanals und dem Klemmspalt F so genau als möglich eingehalten wird. Hierfür sorgt die erfindungsgemäße Kipplagerung der Klemmstücke 11 und 12. Ein weiterer Vorteil, insbesondere im Hinblick auf einen automatischen Druckformwechsel, ist die freie Kippbeweglichkeit beim Einstecken gegen und beim Herausziehen unterstützt durch die Federkraft.The Abbug 3, and also the other Abbugen the printing plates 2 and 4, has a measured along the channel wall 1 a height of preferably at most 10 mm, more preferably at most 9 mm. During the insertion into the clamping channel, it first comes into engagement with a register device arranged in the clamping channel for the lateral alignment of the printing plates 2 and 4. The register device comprises at least one register cam, preferably exactly one register cam, per printing form 2 and 4 and takes care of itself known manner for setting the page register. The printing form 2 passes only after the successful in this way adjustment of the side register in the nip F, ie for clamping the Abbugt 3 is only the foremost area available. The more it matters that a desired distance between the peripheral edge of the clamping channel and the nip F is maintained as accurately as possible. A further advantage, in particular with regard to an automatic printing plate change, is the free tilting mobility during insertion against and during withdrawal supported by the spring force.

Bezugszeichen:Reference numerals:

11
Formzylinderform cylinder
22
Druckformprinting form
33
Abbugbent section
44
Druckformprinting form
55
Abbugbent section
66
Aussparungrecess
77
Federgliedspring member
88th
Füllstückfilling
99
Montagebolzenmounting bolts
1010
--
1111
Klemmstückclamp
1212
Klemmstückclamp
1313
Lagerabschnittbearing portion
1414
Fingerfinger
1515
Stegweb
1616
Vorsprunghead Start
1717
Stegweb
1818
Vertiefungdeepening
FF
Klemmspaltnip
RR
Kippachsetilt axis
VV
Drehrichtungdirection of rotation

Claims (20)

  1. A device for clamping at least one bendable printing film on a printing cylinder, said device comprising:
    a) a clamping piece (11; 12) which is arranged in a clamping channel of the printing cylinder (1) and forms a clamping gap (F) with a clamping area, into which gap a bent edge (3, 5) of the printing film (2, 3) can be inserted;
    b) and a spring member (7) for charging the clamping piece (11; 12) with a spring force,
    c) wherein an outer surface of the clamping piece (11; 12) abuts against a bearing which is formed in the clamping channel and mounts the clamping piece (11; 12) such that it can be tilted away from the clamping area, against the spring force,
    characterised in that
    d) the clamping piece (11; 12) is mounted by means of a mounting bolt (9) and charged with the spring force in the longitudinal direction of the mounting bolt (9).
  2. The device according to claim 1, characterised in that the clamping piece (11; 12) is pressed against the bearing by the spring force.
  3. The device according to the preceding claim, characterised in that the spring force which acts on the clamping piece (11; 12) and the force which acts on the bearing from the clamping piece (11; 12) have a common direction component.
  4. The device according to any one of the preceding two claims, characterised in that the spring force which acts on the clamping area in the clamping gap (F) and the spring force which acts on the bearing have a common direction component.
  5. The device according to any one of the preceding claims, characterised in that the clamping piece (11; 12) only has the degree of freedom of movement of its possible tilting movement about a tilting axis (R) formed by the contact with the bearing.
  6. The device according to any one of the preceding claims, characterised in that the clamping piece (11; 12) has at least substantially only linear contact with the bearing.
  7. The device according to any one of the preceding claims, characterised in that an edge which is formed on the clamping piece or preferably in the clamping channel forms the bearing.
  8. The device according to any one of the preceding claims, characterised in that one of the walls (1a-1e) of the clamping channel which surround the clamping piece (11; 12) forms the bearing.
  9. The device according to any one of the preceding claims, characterised in that a tilting lever which is formed by the clamping piece (11; 12) and extends from a tilting axis (R) of the clamping piece (11; 12) to the clamping gap (F) points at least substantially parallel to the clamping area.
  10. The device according to any one of the preceding claims, characterised in that the clamping piece (11; 12) forms only a single clamping gap (F), the width of which is preferably at most 10% of the width of a single-width printing film (2, 3) which is to be clamped.
  11. The device according to any one of the preceding claims, characterised in that the clamping piece (11; 12) comprises a mounting portion (13) for mounting, preferably tilt-mounting, the clamping piece (11; 12) and comprises a finger (14) which projects outwards from the mounting portion (13) towards an opening of the clamping channel and forms the clamping gap (F) with the clamping area.
  12. The device according to the preceding claim, characterised in that the spring member (7) is supported in the clamping channel and acts on the clamping piece in the region of the mounting portion (13), preferably protruding into the mounting portion (13).
  13. The device according to any one of the preceding claims, characterised in that the clamping piece (11; 12) protrudes into a recess (18) formed in the clamping channel, preferably into a groove which extends over at least most of the length of the clamping channel, and a peripheral region of the recess, preferably an edge, forms the bearing, wherein a free space remains between the clamping piece (11; 12) and the base of the recess (18).
  14. The device according to any one of the preceding claims, characterised in that at least one register body for setting the side register of the printing film (2, 4) is arranged in the clamping channel (1a-1e), axially offset with respect to the clamping piece (11; 12), and in that the register body exhibits a distance from an opening of the clamping channel (1a-1e), formed on the circumference of the printing cylinder (1), which is smaller than the clamping gap (F), such that the printing film (2, 4) passes into engagement with the register body when it is inserted into the clamping channel (1a-1e), before the clamping piece (11; 12) clamps it.
  15. The device according to any one of the preceding claims, characterised in that an additional clamping piece (12; 11) is arranged in the clamping channel and forms a clamping gap (F) with an additional clamping area by being charged with a spring force, wherein a bent edge (5, 3) of the same printing film or an additional printing film (3, 2) can be inserted into said gap and the outer surface of the additional clamping piece (12; 11) abuts against an additional bearing which is formed in the clamping channel and mounts the additional clamping piece (12; 11) such that it can be tilted away from the additional clamping area, against the spring force.
  16. The device according to the preceding claim, characterised in that an additional wall (1b, 1a) of the clamping channel, which extends at least substantially radially in relation to the rotational axis of the printing cylinder (1), up to an opening of the clamping channel, forms the additional clamping area.
  17. The device according to the preceding claim, characterised in that the walls (1a, 1b) which form the clamping areas are spaced at least substantially in parallel from each other up to the opening, wherein the distance or a greatest distance is preferably 5 mm at most.
  18. The device according to any one of the preceding three claims, characterised in that the bent edge (3, 5) comprises a cavity (6) into which the clamping piece (11; 12) which does not clamp the bent edge protrudes in the clamped state.
  19. The device according to any one of the preceding four claims, characterised in that the clamping pieces (11, 12) largely, preferably predominantly, overlap each other in the circumferential direction of the printing cylinder (1), at least in the region of the clamping gap (F) formed by them.
  20. The device according to any one of the preceding claims, characterised in that a number of the clamping pieces (11, 12) are each individually arranged in the clamping channel such that they can be tilted and each form a clamping gap (F) with the clamping area, and in that the clamping pieces (11, 12) are assigned spring members (7), each of which acts on only one of the clamping pieces (11, 12), respectively.
EP07786026A 2006-07-12 2007-07-12 Clamping device comprising a tiltable clamping piece Not-in-force EP2040927B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006032264A DE102006032264A1 (en) 2006-07-12 2006-07-12 Clamping device with tiltable clamping piece
PCT/EP2007/006194 WO2008006585A1 (en) 2006-07-12 2007-07-12 Clamping device comprising a tiltable clamping piece

Publications (2)

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EP2040927A1 EP2040927A1 (en) 2009-04-01
EP2040927B1 true EP2040927B1 (en) 2009-12-09

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EP07786026A Not-in-force EP2040927B1 (en) 2006-07-12 2007-07-12 Clamping device comprising a tiltable clamping piece

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EP (1) EP2040927B1 (en)
AT (1) ATE451241T1 (en)
DE (2) DE102006032264A1 (en)
WO (1) WO2008006585A1 (en)

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Publication number Priority date Publication date Assignee Title
DE102007054935A1 (en) * 2007-11-17 2009-05-20 Manroland Ag Printing press cylinder
DE102008042703B4 (en) * 2008-10-09 2011-04-07 Koenig & Bauer Aktiengesellschaft Form cylinder of a printing press and a method for mounting at least one flexible printing plate

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US5010818A (en) * 1988-02-29 1991-04-30 Rockwell International Corporation Tensionless plate lock-up
DE4225949C2 (en) * 1992-08-06 1994-10-13 Roland Man Druckmasch Device for attaching a flexible pressure plate
DE19924784C2 (en) * 1999-05-29 2001-05-31 Koenig & Bauer Ag Device for fastening flexible plates on a cylinder of a rotary printing machine with reversal of the direction of rotation
DE10058996C1 (en) * 2000-11-28 2002-06-13 Koenig & Bauer Ag Pulling-up mechanism fixing device has channel with single one-lever fixing device in each section perpendicular to axial direction of cylinder
DE20022737U1 (en) * 2000-12-04 2002-03-14 Koenig & Bauer Ag Device for mounting an elevator on a cylinder
DE20220293U1 (en) * 2001-10-05 2003-05-28 Koenig & Bauer Ag Web-fed printing machine has printer unit printing width of six axially adjacent pages, with superstructure, at least one roller and folder and two printing towers
DE10261954B4 (en) * 2002-04-25 2006-08-03 Koenig & Bauer Ag Cylinder of a rotary printing machine
DE10220548B4 (en) * 2002-05-08 2004-05-27 Koenig & Bauer Ag Attaching a flexible elevator to a cylinder of a rotary printing press
DE10244944B4 (en) * 2002-09-26 2005-01-27 Maschinenfabrik Wifag Clamping device for clamping a flexible covering of a cylinder of a printing machine
DE102005029167A1 (en) * 2005-06-23 2006-12-28 Maschinenfabrik Wifag Covering for printing cylinder has identical clamping flanges, at least one of which may be planar
DE102006017222A1 (en) * 2005-06-28 2007-01-04 Koenig & Bauer Ag Cylinder of a rotary printing machine with at least one extending in the axial direction of this cylinder under the lateral surface channel

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DE102006032264A1 (en) 2008-01-17
WO2008006585A1 (en) 2008-01-17
EP2040927A1 (en) 2009-04-01
DE502007002279D1 (en) 2010-01-21
ATE451241T1 (en) 2009-12-15

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