EP2106908B1 - Dampening device of a spray dampening unit - Google Patents

Description

Field of the invention

The invention relates to a moistening device of a spray dampening unit for printing machines and to a method for positioning a spray bar in such a moistening device.

Background of the invention and prior art

Dampening units are used in printing technology. In the case of dampening systems, devices are usually a series of contacting rollers which apply a dampening solution (usually water and several additives) evenly to a printing plate.

By means of dampening systems, the water can be supplied via a water tank, via nozzles or in a similar manner e.g. applied to a ductor roller and then transported as a water film over all rollers evenly to the pressure plate. The dampening units in which nozzles are used are also referred to as spray dampening units.

Sprühfeuchtwerke usually have a spray valves carrying spray bar, which is mounted for different purposes towards the roller and away from this adjustable on a housing.

A spray dampening of this kind is from the EP 1 009 633 B1 known. In the known device, the two ends of a spray bar are held such that the spray bar and thus the spray nozzles can be adjusted to the roller. The patent DE 698 35 545 T2 describes a spray dampening unit, the spray bar is pivotally mounted on a fixed spray room. The spray dampening unit is divided into two components, a spray room permanently mounted on the pressure frame and a rear pivoting beam in which the spray valves are located.

Further spray dampening units will be installed in DE 198 11 554 C1 and DE 103 17 470 B4 described.

In the known spray dampening designed the maintenance of the valves, the control of contamination in the spray room and the cleaning of the device z.T. difficult. The device of the spray dampening is complex and can z.T. be adapted only to a limited extent to the circumstances.

task

The invention has for its object to provide a low-priced and easy-to-maintain and / or retrofitted humidifying a Sprühfeuchtwerks for printing machines.

Solution of the task

The object is achieved by the device according to the independent claim. Advantageous embodiments are disclosed in the subclaims.

A first aspect of the invention relates to a spray dampening unit comprising a moistening device with a dampening unit housing, a spray bar holder and a spray bar, wherein the spray bar is connected to the dampening unit via the spray bar holder in such a way that the spray bar is connected between a spray bar Working position and a service position is pivotable, wherein the spray bar in the service position relative to the Sprühbalkenhalterung has at least one degree of freedom, which allows the spray bar is removed from the Sprühbalkenhalterung, and wherein the spray bar, this at least one degree of freedom is taken when swiveling in the working position.

The dampening unit housing, which could also be referred to as a spray housing, can be attached to a machine frame of the printing press or the dampening unit. The dampening box may extend parallel to and along the body to be humidified. The body to be moistened can be a fountain roller of the dampening unit. It may be provided on the spray bar dampening spray nozzles, which may be freely accessible in the service position from outside the dampening unit housing. In the art, and also in the sense used here, the term degree of freedom describes the possibility of movement of bodies in space. The term is often used in the context of joints, and refers to the number and type of possible movements that the joint can perform. It is based on the assumption that a body has three rotational and three translatory degrees of freedom in space. A joint is when two bodies communicate with each other in such a way that at least one of the six degrees of freedom of the other body is taken via the articulated relationship of one body to the other. The degree of freedom of the spray bar in the service position can be a translational degree of freedom. The translatory degree of freedom can be given on the spray bar in nozzle spray direction in the service position. Without the one or more degrees of freedom in the service position, the spray bar in the working position may have a defined in relation to the dampening unit housing, which specifies a distance of the spray nozzles from the body to be moistened. Working position is the position in which the spray bar is in operation of the spray dampening unit. The body to be moistened may be, for example, a roller to be moistened, in particular a ductor roller of the spray dampening unit.

Another embodiment relates to such a moistening device of a spray dampening unit, wherein the spray bar is pivotable together with the Sprühbalkenhalterung between the working position and the service position.

Furthermore, in another embodiment of such a moistening device, the spray bar holder may comprise two substantially U-shaped profiles each having two legs, the spray bar being slidably held in the service position in the U-shaped profiles between the legs of the U-shaped profiles. In this embodiment, the spray bar may have a displaceability in the direction of a longitudinal extension of the legs, ie in the removal direction. Thus, at least one translatory degree of freedom (displacement in the withdrawal direction) can be provided. It is also conceivable another design of a longitudinal guide which provides a translatory degree of freedom in removal direction. The translatory degree of freedom in the withdrawal direction may be directed in a direction which is parallel to a radius extending from the pivot axis.

Furthermore, such a moistening device may have a design in which the U-shaped profiles are arranged on a service flap such that when opening the service flap, the U-shaped profiles are pivoted together with the spray bar from the dampening unit to the service position. A service door defines a flap on the dampening unit housing a humidifying device, through which access to the spray bar for the purpose of its maintenance, etc. can be granted. The service door may extend substantially the length of the spray bar.

Furthermore, such a moistening device may have a design in which the dampening unit housing in the working position of the spray bar in the spraying direction in front of the spray bar forms a substantially closed spray chamber, wherein the dampening unit housing in the region of the spray chamber Inspection hatch, over which the spray room is accessible from outside the dampening unit housing. In this case, the inspection flap can be arranged so that a sighting of the spray bar can be made in the working position. The inspection flap can be checked spray pattern, contamination of the spray room and / or the spray nozzles. The inspection flap may extend substantially the length of the spray bar. Essentially completed refers to the working state of the dampening unit, in which the dampening unit is arranged in close proximity to the body to be humidified, so that the body to be humidified blocks a spray opening in the dampening unit housing the spray chamber on one side. The body to be moistened may be, for example, a fountain roller of a dampening unit.

A further embodiment relates to such a moistening device in which the spray bar is subjected to the at least one degree of freedom when swiveling into the working position by swiveling in a holding region of the spray bar into a guide opening of a positioning element. A holding region of the spray bar can be provided via a corresponding design of a spray bar cross-section corresponding to a guide opening cross-section. For example, the spray bar cross section may be made substantially rectangular and the guide opening area may be e.g. have at least one planar contact area, to which one side of the rectangular Sprühbalkenquerschnitts is applied in the service position. The planar contact area can run transversely or perpendicular to the spraying direction of the spray nozzles. The distance between the spray bar and e.g. the ductor roller are specified in spray direction.

A further embodiment of a spray dampening unit has a positioning element, wherein the positioning element has a mounting region and a contact region, wherein the positioning element extends beyond the mounting region is exchangeably mounted on the dampening unit housing, and wherein the contact area is designed such that the spray bar can be brought into abutment with the contact area of the positioning, so that over the plant to the contact area a defined position of the spray bar in relation to the dampening unit is guaranteed. The mounting area refers to the area of the positioning element over which the positioning element can be mounted in the dampening unit housing. The contact area is an area with functional areas at which a contact contact between spray bar and positioning element can be provided. The contact area may have surface areas which are adapted to the contour of the spray bar in corresponding surface areas. The surface areas of the contact area may correspond to the surface design of the spray bar in the holding area of the spray bar. One or more positioning elements can be provided for the positioning of the spray bar in the dampening unit per spray bar. A positioning element may for example be configured plate-shaped and / or mounted on a side part of the dampening unit housing. With several positioning elements per spray bar, these can be provided on both sides of the dampening unit housing at the ends of the spray bar, for example. An arrangement in the central region of the spray bar in its working position is conceivable.

Such a moistening device may have a design in which the moistening device has a fine adjustment device via which the exchangeable mounting of the positioning element on the dampening unit housing can be effected and by means of which the position of the positioning element relative to the dampening unit housing can be fine-tuned. Such a fine adjustment device may e.g. via a screw connection of the positioning via slots. The slots may e.g. be arranged in the side panels of the dampening unit housing and / or in the respective positioning element itself.

In this case, such a moistening device is a set of Positioning elements have, in which the contact areas have in different positions to the mounting areas, so that on the choice of or the respective positioning a coarse adjustment of the position of the spray bar in the dampening unit housing is vornehmbar. The positioning elements can be provided, for example, as essentially plate-shaped cast parts, in particular injection-molded parts. The positioning can be made in one piece and / or plastic.

A further embodiment relates to such a moistening device, in which the abutment region of the positioning element is provided in the region of a guide opening of the positioning element, into which the spray bar can be inserted into a working position and / or removed therefrom.

Furthermore, such a moistening device may have a design in which the guide opening of the positioning element has an opening area with an opening width which is greater than the corresponding width of the spray bar, and wherein the guide opening has a base area with a basic width which corresponds to the corresponding width of the spray bar , The opening area refers to the area of the positioning element through which the spray bar first passes when it is pivoted to its working position. The basic area refers to the area of the positioning element that surrounds the spray bar on both sides when the spray bar has reached its working position. Thus, via this design of the basic width, e.g. a clamping of the spray bar can be effected in this position.

Furthermore, in one embodiment of the moistening device, the guide opening of the positioning element can have an elastically deformable locking area which fixes the spray bar in its working position after complete insertion of the spray bar. Such a locking region may be formed integrally with the positioning element, for example as a latching element. Also conceivable is an embodiment of the locking portion as an independent component, which on the positioning is mounted or provided independently of the positioning of the moistening device and / or mounted.

• Bereitstellen eines Feuchtwerksgehäuses,
• Bereitstellen eines Sets von Positionierelementen welche jeweils einen Montagebereich und einen Anlagebereich aufweisen, wobei das Set unterschiedliche Positionierelemente aufweist,
• Bereitstellen eines Sprühbalkens,
• Auswählen eines für eine gewünschte Position des Sprühbalkens im Feuchtwerksgehäuse geeigneten Positionierelementes aus dem Set von Positionierelementen,
• Montage der ausgewählten Positionierelemente.

To assist in understanding the described embodiments, a method for positioning a spray bar in a spray dampening unit comprising the steps is helpful

• Providing a dampening housing,
• Providing a set of positioning elements each having a mounting area and an abutment area, the set having different positioning elements,
• Providing a spray bar,
• Selecting a positioning element suitable for a desired position of the spray bar in the dampening housing from the set of positioning elements,
• Assembly of the selected positioning elements.

In the method, the assembly of the selected positioning over the mounting portion of the positioning can be done on corresponding dampening unit mounting areas of the dampening unit housing. Thereafter, the spray bar can be brought into abutment with an abutment region of the positioning element. The procedure can also be reversed so that the positioning was mounted on the spray bar and investment areas of the selected positioning are brought into abutment with investment areas in the dampening unit housing. A difference between positioning elements of the set can lie in a different position of the respective contact area in relation to the respectively provided mounting area. Thus, different positions of the spray bar can be adjusted in a simple manner with comparably short set-up times. A difference between positioning elements of the set can also lie in a different design of a guide opening of a positioning element. So different spray bars can be easily mounted in the dampening unit housing with the advantages mentioned above different positioning.

In such a method, the provided humidifying device of a spray dampening unit may be a humidifying device as described above, as well as the set of positioning elements provided may be a set of positioning elements as described above.

Hereinafter, individual embodiments of the invention will be described by way of example. In this case, the individual embodiments described have, in part, features which are not absolutely necessary in order to carry out the present invention, but which, in certain applications, generally provide desired properties. Thus, embodiments are also considered to be covered by the teaching of the invention, which does not have all the features of the embodiments described below. Further, to avoid unnecessary repetition, certain features will be described only with respect to particular embodiments. It should be noted that the individual embodiments should therefore not be considered alone, but that individual embodiments may also be modified by incorporating one or more features of other embodiments. It should be understood that a systematic combination of the individual embodiments having single or multiple features described with respect to other embodiments may be desirable and useful, and thus both contemplated and considered to be encompassed by the description.

Brief description of the drawings

Figur 1

eine bevorzugte Ausführungsform einer erfindungsgemäßen Befeuchtungsvorrichtung in einer isometrischen Ansicht,

Figur 2

eine Seitenansicht einer Ausführungsform der Befeuchtungsvorrichtung gemäß der Erfindung mit einem Sprühbalken in Serviceposition,

Figur 3

eine Seitenansicht einer Ausführungsform der Befeuchtungsvorrichtung gemäß der Erfindung mit einem Sprühbalken in Arbeitsposition und

Figur 4

eine isometrische Ansicht eines Positionierelements der Befeuchtungsvorrichtung.

In the figures shows:

FIG. 1

A preferred embodiment of a moistening device according to the invention in an isometric view,

FIG. 2

a side view of an embodiment of the humidifying device according to the invention with a spray bar in service position,

FIG. 3

a side view of an embodiment of the moistening device according to the invention with a spray bar in working position and

FIG. 4

an isometric view of a positioning of the moistening device.

Detailed description of the drawing

FIG. 1 shows a preferred embodiment of a moistening device 10 according to the invention in an isometric view.

In the figure, the moistening device 10 is shown in a service position in which a spray bar 40 has been removed from a spray bar holder 30.

In the FIG. 1 and in the other figures has been omitted to show the remaining parts of a spray dampening unit or a printing press on which such a spray dampening unit is arranged. Therefore, a ductor roller, which can be moistened by the moistening device 10, for example, not shown. However, it is apparent that a dampening unit housing 20 of the moistening device 10 on the in FIG. 1 left side has a concave recess which is adapted to the convex surface profile of the ductor roller, so that the moistening device 10 can be brought close to the ductor roller.

The moistening device 10 shown in the service position has a service flap 21 in the rear part of the dampening unit housing 20, which is unfolded in the illustrated service position. Furthermore, an inspection flap 22 is shown in spray direction of the spray bar 40 in front of the spray bar on the dampening unit housing 20, through which the interior of a spray chamber 23 is accessible.

On the service flap 21, a spray bar holder 30 is arranged, which is formed in the illustrated embodiment as a fork-shaped holder. The support may have a substantially U-shaped cross-section and may be secured to the service door 21 as shown, such that opening the service door causes the spray bar support 30 to pivot so that a spray bar 40 placed in the spray bar support 30 is in a service position can be pivoted.

As can also be seen in this figure, the spray bar 40 at its two longitudinal ends holding portions 41, which have a substantially rectangular cross-section. In this case, two of the parallel sides of the rectangular cross section with the opening cross section of the spray bar holder 30, which in this embodiment has the described U-shaped cross section, corrspond. If the spray bar 40 is inserted into the spray bar holder 30 via its holding area 41, it is more likely in the illustrated embodiment to be displaced in the direction of the legs of the spray bar holder 30. On the other hand, it is fixed in the transverse direction.

The other two parallel sides of the rectangular cross-section correspond in the illustrated embodiment with a guide opening 52, which is provided on a positioning element 50. In this case, in each case a positioning element 50 is mounted on both longitudinal ends of the dampening unit housing 20 in the illustrated embodiment. The guide opening 52 has, as in FIG. 2 is shown, a contact area 51, with one side of the Holding portion 41 comes into engagement when swiveling the spray bar 40 in the working position. The illustrated guide opening 52 has in this embodiment on the opposite other side on a further wall portion. The distance between this wall region and the abutment region 51 can correspond approximately to the width of the corresponding part of the holding region 41.

After pivoting the spray bar 40 in the working position, which in FIG. 3 is shown, the holding portions 41 are thus pivoted into the guide opening 52, and although the spray bar 40 is not fixed in the Sprühbalkenhalterung 30 in the spray direction of its spray nozzles 42, he is by the interaction of its holding portion 41 with the guide opening 52 in this position also in the spray direction fixed. The displaceability which the spray bar 40 still has in the spray bar holder 30 is accordingly taken from it when pivoting into the guide opening 52.

The precise position in the spraying direction, in which the spray bar 40 is fixed in its working position in this way, can be adjusted via a fine adjustment device 60. The fine adjustment device 60 is realized in the illustrated embodiment by elongated holes in a side part of the dampening unit housing 20 and corresponding screws with which the positioning element 50 is fixed in the dampening unit housing 20. The elongated holes can additionally or alternatively also be provided on the positioning element 50, which in the illustrated embodiment is in the form of a plate. Element is formed and can be manufactured in one piece by plastic injection molding. The elongated holes in the positioning element 50 are in FIG. 4 represented and form a mounting portion 53rd

Further, in the illustrated positioning member 50, a locking portion 55 is provided, which causes a latching of the spray bar 40 in the positioning member 50. The locking portion 55 is the Figures 2 and 3 shown. In the illustrated positioning element 50, the wall region of the positioning element, which is opposite to the abutment region 51, is made significantly shorter, so that an opening portion 521 is provided in the guide opening 52 having an opening width W1 which is significantly larger than the width of the corresponding area of the holding portion 41 of the spray bar 40. At the bottom of the guide opening 52, a base portion 522 is formed, which has a basic width W2, which substantially corresponds to the corresponding width of the holding portion 41.

For a moistening device 10 or for a dampening unit housing 20, a set of positioning elements 50 can be provided which has differently configured positioning elements 50. Such a different embodiment may e.g. The fact that the contact areas 51 of the respective positioning elements 50 have a different distance from the respective mounting area 53 of the respective positioning element 50 relative to the spray direction of a spray bar 40 inserted into the positioning plate.

By choosing a suitable positioning element 50, therefore, a distance between the abutment region 51 and a surface of a ductor roller, which is to be moistened by the moistening device 10, can be preselected. Accurate positioning can then be done via the fine adjustment device 60.

LIST OF REFERENCE NUMBERS

10

humidifying

20

Dampening housing

21

service flap

22

inspection hatch

23

spraying room

30

spray-bar

40

spray

41

holding area

42

spray nozzle

50

positioning

51

plant area

52

guide opening

521

opening area

W1

opening width

522

basic area

W2

basic length

53

assembly area

55

locking area

60

Fine adjustment device

Claims (12)

1. Spray-dampening unit comprising a dampening device (10), with a dampening-unit housing (20), with a spray-bar mounting (30) and with a spray bar (40), the spray bar (40) being connected to the dampening-unit housing (20) via the spray-bar mounting (30) in such a way that the spray bar (40) is pivotable between an operating position and a servicing position, characterized in that in the servicing position the spray bar (40) has in relation to the spray-bar mounting (30) at least one degree of freedom which makes it possible for the spray bar (40) to be removable from the spray-bar mounting (30), and this at least one degree of freedom being taken away from the spray bar (40) when the latter is being pivoted into the operating position.
2. Spray-dampening unit according to Claim 1, the spray bar (40), together with the spray-bar mounting (30), being pivotable between the operating position and the servicing position.
3. Spray-dampening unit according to one of the preceding claims, the spray-bar mounting (30) having two essentially U-shaped profiles, each with two legs, in the servicing position the spray bar (40) being inserted into the U-shaped profiles and being held displaceably between the legs of the U-shaped profiles.
4. Spray-dampening unit according to one of the preceding claims, the U-shaped profiles being arranged on a servicing flap (21) in such a way that, when the servicing flap (21) is opened, the U-shaped profiles, together with the spray bar (40), are pivoted out of the dampening-unit housing (20) into the servicing position.
5. Spray-dampening unit according to one of the preceding claims, in the operating position of the spray-bar the dampening-unit housing (20) forming in front of the spray bar (40) in the spraying direction an essentially closed-off spray space (23), the dampening-unit housing (20) having in the region of the spray space (23) an inspection flap (22), via which the spray space (23) is accessible from outside the dampening-unit housing (20).
6. Spray-dampening unit according to one of the preceding claims, during the pivoting of the spray bar (40) into the operating position its at least one degree of freedom being taken away via the pivoting of a holding region of the spray-bar into a guide orifice (52) of a positioning element.
7. Spray-dampening unit according to one of the preceding claims, with a positioning element (50), the positioning element (50) having a mounting region (53) and an abutment region (51), the positioning element (50) being mounted exchangeably on the dampening-unit housing (20) via the mounting region (53), and the abutment region (51) being configured in such a way that the spray bar (40) can be brought to abut against the abutment region (51) of the positioning element, so that a defined position of the spray bar in relation to the dampening-unit housing (20) can be ensured via the abutment against the abutment region (51).
8. Spray-dampening unit according to Claim 7, the dampening device (10) having a fine-setting device (60), via which the exchangeable mounting of the positioning element on the dampening-unit housing (20) can be brought about, and via which the position of the positioning element with respect to the dampening-unit housing (20) can be finely set.
9. Spray-dampening unit according to either of Claims 7 or 8, the spray-dampening unit having a set of positioning elements in which the abutment regions (51) are in different positions with respect to the mounting regions (53), so that a rough setting of the position of the spray bar in the dampening-unit housing (20) can be carried out via the selection of the respective positioning element or positioning elements.
10. Spray-dampening unit according to one of Claims 7 to 9, the abutment region (51) of the positioning element being provided in the region of a guide orifice (52) of the positioning element into which the spray bar (40) can be inserted into an operating position.
11. Spray-dampening unit according to Claim 10, in which the guide orifice (52) of the positioning element has an orifice region (521) with an orifice width (W1) which is greater than the corresponding width of the spray bar, and the guide orifice (52) having a bottom region (522) with a bottom width (W2) which conforms to the corresponding width of the spray bar.
12. Spray-dampening unit according to either of Claims 10 or 11, in which the guide orifice (52) of the positioning element has an elastically deformable locking region (55) which, after the complete insertion of the spray bar (40), fixes the spray bar in its operating position.

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