EP1462253B1 - Bearing and clutch device for a replacable cylinder of a varnishing or printing machine - Google Patents

Description

The invention relates to a bearing and coupling device for an insertable or removable cylinder of a varnishing or printing machine, with two, the two end regions of the cylinder assignable rotary bearings, of which at least one for the insertion or removal of the cylinder is axially displaceable and arranged on a holding device ,

A known bearing and clutch device is referred to as a so-called Hirth clutch. The cylinder of the painting or printing machine can be removed with the clutch released the machine and replaced, for example, against another cylinder. The Hirth coupling has a central screw which coincides with the axis of rotation of the cylinder. When the screw is released, the cylinder can be removed from the paint or printing machine. In the known device requires a cylinder change extensive installation work.

From the EP-B-0404765 a bearing and coupling device for a cylinder of a printing press is known, wherein at least one rotary bearing is arranged axially displaceable.

From the GB-A-743377 a bearing and coupling device for a cylinder of a printing press is known in which by means of a crank mechanism, a bearing holder is displaced. During the displacement, the bearing holder performs an axial movement.

The invention has for its object to provide a bearing and coupling device of the type mentioned, by means of In a simple way, a cylinder change can be performed on a Lackier or printing press.

This object is achieved in that the axially displaceable pivot bearing for an axial rotation taking place by rotation coaxially to a holding device forming, at the same time an axial displacement performing screw-holding device is arranged at its rotary displacement. If the pivot bearing axially displaced away from the cylinder for a change process, the cylinder is released and can be removed from the machine who the. A new cylinder is inserted radially into the machine and then coupled by axial displacement of the pivot bearing. This procedure is very simple and requires only that coupled by the axial displacement of the cylinder at its two end faces and thus rotatably held in working position. At least one of the pivot bearing is arranged in a holding device. In that regard, takes place for the removal or insertion of a cylinder, an axial displacement of the holding device, whereby the associated pivot bearing is axially displaced. The axially displaceable pivot bearing is arranged coaxially on a screw-holding device forming the holding device for an axial displacement taking place by means of rotation. Under screw-holding device is an arrangement to understand that simultaneously performs an axial displacement in a rotational displacement, ie, the rotational displacement is crucial for the fact that the axial displacement begins. Since the rotary bearing is located coaxially on the holding device and this axis corresponds to the axis of the screwing movement, the rotary bearing is displaced axially by the rotational movement of the holding device. In this way, a cylinder can be coupled or decoupled. The rotation does not have to be a whole Rotation, but it is - depending on the steepness of the Schraubenbildung- usually sufficient when a rotational movement is performed by an angle of, for example ≤ 120 °.

Preferably, one of the rotary bearing is axially displaceable and the other of the rotary bearing axially fixed. This configuration requires only a small construction cost, since that a pivot bearing can be designed as an axial bearing. This means that in a Zylindereinsetzvorgang the one end of the cylinder is guided against a corresponding element of the pivot bearing and thereby a coupling is realized. The other pivot bearing - or a corresponding, associated with this pivot bearing element - is then displaced axially and thereby couples the cylinder on its associated other end face.

According to a preferred embodiment, it is provided that the axially displaceable pivot bearing is received in a screw-holding sleeve forming the screw-holding device. By rotating the sleeve about the axis of rotation provided for the cylinder in the painting or printing machine, the retaining sleeve moves axially, so that the rotary bearing accommodated in it is also displaced axially, in order to enable engagement or disengagement of a cylinder.

In particular, it is provided that bear in the pivot bearings stub shaft or correspondingly other elements with which the cylinder is axially coupled. The stub shafts are always associated with the pivot bearings, that is, they remain in the pivot bearings even when the cylinder is removed. The cylinder has corresponding shaft ends which are axially coupled with the stub shafts. In particular, it is provided that the stub shaft of one of the rotary bearing is arranged axially immovable and the stub shaft of the other pivot bearing allows relative to this a certain axial displacement, which does not serve the coupling operation of the cylinder, but the bearing preload. This will be discussed in more detail below.

The coupling between the stub shaft and cylinder preferably takes place by means of spur toothing. This ensures that each of the two shaft stub axle-centered with the axis of rotation of the cylinder engages. In principle, it is sufficient if the spur toothing has only one tooth on one element and a groove in the other element and that in the coupling the tooth retracts into the groove. Preferably, however, a plurality of teeth are provided with corresponding tooth receiving grooves distributed over the circumference are so that an automatic centering of the parts to be coupled takes place during the coupling process

The screw-holding device is held in particular by means of a curve guide on the machine frame of the painting or printing machine. This cam guide realizes the screw coupling of the cylinder, that is to say by rotational movement an axial movement is brought about in order to be able to make the coupling or end coupling of the cylinder. The cam guide is preferably designed as a slot-pin guide or as a slot-roller guide. In particular, a plurality of cam guides can be provided offset in angle to one another, so that a force introduction of the screwing movement is effected at several points of the circumference. A "tilting movement" or a "tilting" of the screw-holding device during coupling is thereby prevented.

One of the rotary bearings is preferably preloaded axially. This leads to the elimination of the bearing clearance and therefore to a high running precision.

In particular, the holding device of the axially displaceable pivot bearing is held free of play by radial clamping means. Consequently, in the radial direction to the rotational movement a backlash by said Measure achieved to create a smooth and precise running behavior.

The radial clamping means are preferably formed by a radial clamping sleeve. This clamping sleeve is aligned coaxially to the axis of rotation of the pivot bearing. It is preferably radially elastically deformable in order to produce the freedom of play in this way. The deformability is generated in particular by means of a pressure medium, ie, the pressure medium is introduced with a correspondingly high pressure, so deforms the radial clamping means due to its elasticity in the radial direction and eliminates any existing game, ie, the corresponding pivot bearing is in the radial direction backlash with the machine frame the paint or printing machine connected. As a pressure medium, in particular a compressed gas or a pressure fluid can be used.

Preferably, the mentioned cylinder is a painting cylinder of a painting machine.

Advantageous developments of the invention will become apparent from the dependent claims.

Figur 1

eine Schnittansicht durch eine Lager- und Kupplungseinrichtung einer Lackiermaschine mit eingesetztem Lackierzylinder,

Figur 2

die einem Ende des Lackierzylinders zugeordnete Lager- und Kupplungseinrichtung in Arbeitsposition des Lackierzylinders,

Figur 3

eine der Figur 2 entsprechende Darstellung, jedoch in beginnender Entkupplungsstellung des Lackierzylinders,

Figur 4

eine der Figur 3 entsprechende Darstellung, jedoch bei entkuppeltem Lackierzylinder,

Figur 5

eine perspektivische Ansicht auf die Einrichtung gemaß Figur 2 und

Figur 6

eine der Figur 5 entsprechende Ansicht, jedoch aus einem anderen Blickwinkel.

The drawings illustrate the invention with reference to an embodiment and shows:

FIG. 1

a sectional view through a bearing and coupling device of a painting machine with inserted painting cylinder,

FIG. 2

the bearing and coupling device associated with one end of the painting cylinder in the working position of the painting cylinder,

FIG. 3

one of the FIG. 2 corresponding representation, but in incipient uncoupling position of the painting cylinder,

FIG. 4

one of the FIG. 3 corresponding representation, but with uncoupled painting cylinder,

FIG. 5

a perspective view of the device gemaß FIG. 2 and

FIG. 6

one of the FIG. 5 corresponding view, but from a different angle.

The FIG. 1 shows two side walls 1 and 2 of a painting machine 3, not shown. The side wall 1 is a pivot bearing 4 and the side wall 2 a pivot bearing 5 assigned to a replaceable cylinder 6 of the painting machine 3. The cylinder 6 is formed as a painting cylinder 7 and in FIG. 1 shown only shortened (fault lines 8). It has a rotation axis 9 and at its two end regions 10, 11 shaft ends 12 and 13, which are formed smaller diameter than the rest of the body of the cylinder 6. The shaft ends 12 and 13 are each provided with an end toothing 14, 15, which is configured in each case coaxially to the axis of rotation 9.

The rotary bearing 5 is preferably designed as an axially biased oblique roller bearing with two bearing rings 16 and 17 such that a stub shaft 18 about an axis of rotation 19 rotatable is stored. In the axial direction (x or -x), the pivot bearing 5 is fixed, ie, the rotatable stub shaft 18 is not displaceable in the axial direction (x-direction) The stub shaft 18 is equipped with a spur gear 20, which is connected to the spur gear teeth 15 of the painting 7 corresponds. In the working position of the painting cylinder 7, the axis of rotation 9 and the axis of rotation 19 are aligned with each other, that is, at the in FIG. 1 drawn coupling position of spur gearing 15 and spur gearing 20 of the painting cylinder 7 is rotatably and axially substantially immovably (without consideration of a later-explained bearing preload) by means of the pivot bearing 5 mounted on the side wall 2 of the painting machine 3.

The rotary bearing 4 is designed as a double-row cylindrical roller bearing 21, which supports a stub shaft 22 about a rotation axis 23 on the first side wall 1 of the painting machine 3. The cylindrical roller bearing 21 is received in a holding device 24, which is designed as a screw-holding device 25. This means that a rotation of the screw-holding device 25 about the rotation axis 23 leads to a displacement in the x direction, ie, the screw-holding device 25 is rotatably mounted about an axis of rotation 26 on the side wall 1, wherein the axis of rotation 26 with the axis of rotation 23 coincides. Depending on the rotational movement of the screw-holding device 25 takes place an axial displacement in the x-direction or -x-direction.

The screw-holding device 25 is in the illustrated embodiment of FIGS. 1 to 6 designed as a screw-holding sleeve 27, wherein the sleeve end has a cover 28. Overall, therefore, a pot shape is realized. Is due to a rotational movement the screw-retaining sleeve 27 a corresponding axial displacement, the cylindrical roller bearing 21 and thus the stub shaft 22 will be taken axially.

The screw-holding sleeve 27 is mounted in a radial clamping means 29 which is sleeve-shaped and is located in a pipe flange 30 which is fixed to the side wall 1. Between elastic material consisting of radial clamping means 29 and pipe flange 30, a sealed annular cavity 31 is formed, which is acted upon by a pressure medium via a terminal 32. If this action, the elastic radial clamping means 29 is widened in its central region in the direction of the screw-holding sleeve 27, wherein the end zones of the radial clamping means 29 are supported on the pipe flange 30. In this way, the holding device 24 is held without play on the side wall 1 of the painting machine 3.

From the pipe flange 30 go three, by 120 ° to each other angularly offset holding arms 33, which carry radially inwardly directed rollers 34 at their free ends. The axes of rotation of the rollers 34 are orthogonal to the axis of rotation 26, that is, they extend radially to this axis of rotation 26. The retaining arms 33 are fixedly connected to the pipe flange 30. The rollers 34 engage in slots 35 of the screw-holding sleeve 27 a. Each of each roller 34 associated slot 35 is -wie in particular the Figures 5 and 6 can be seen is provided with a slope, so that a total curve guide 36 is formed, ie, by a rotation of the screw-holding sleeve 27 about the axis of rotation 26 due to the cam guide 36, an axial displacement of the screw-holding sleeve 27 is initiated. Each slot 35 may have at least one slot end 37 which is pitch-free is configured, that is, it is orthogonal to the axis of rotation 26. The cover 28 is integrally provided with a lever extension 37 on which rotatably an actuating rod 38 engages, which leads to an actuator, not shown.

The stub shaft 22 is provided with a spur toothing 39, which meshes in the working position of the painting cylinder 7 with the spur gear teeth 14 of the shaft end 12. In this position, the axis of rotation 9 of the cylinder 6 is aligned with the axis of rotation 23 of the stub shaft 22nd

The stub shaft 22 has a smaller-diameter portion 41 and an adjoining further, in diameter even further reduced portion 42 which passes through the lid 28 rotatably. An end face 43 of a portion 44 of the stub shaft 22 is provided with a bearing 45 on which a ring 46 is axially supported. On the opposite side of the bearing 45 of the ring 45 engages a helical compression spring 47 with one end, which is supported with its other end on the inside of the lid 28. The helical compression spring 47 turns around the portion 41 of the stub shaft 22. The stub shaft 22 is rotatable about its axis of rotation 23, without the ring 46 is taken. In the region of the outer side 48 of the cover 28 is located on section 42 of the stub shaft 22 an axial securing 49, against which by means of a helical compression spring 50 (FIG. FIG. 2 ) a pot 51 is urged. The helical compression spring 50 turns around the portion 42 of the stub shaft 22. The pot 51 is oriented such that its bottom wall 52 is penetrated by the portion 42 of the stub shaft 22 and abuts against the axial securing 49. The pot wall 53 extends coaxially to the axis of rotation 23 and holds a radial Distance to the section 42, wherein in the space thus formed, the helical compression spring 50 rests, which is supported at one end to the inside of the bottom wall 52 and at the other end to an annular flange 54 by means of a bearing 55 relative to the cover 28 to the Rotary axis 23 is rotatable. The end face 56 of the pot wall 53 of the pot 51 has in the from FIG. 1 or 2 emergent position of the overall device at a distance from the annular flange 54. This corresponds to the working position of the painting cylinder. 7

The result is the following function:

According to FIG. 1 is the painting cylinder 7 in the working position, ie, it is in the engaged position in the painting machine 3, wherein it axially non-displaceable, but rotatably supported about the axis of rotation 9. The axial immobility results from the fact-as mentioned-the pivot bearing 5 is formed axially immovable in the x direction. The stub shaft 22 is urged in the x direction by means of the helical compression spring 47, wherein the cylindrical roller bearing 21 allows axial movement of the stub shaft 22. By means of the helical compression spring 47 thus the painting cylinder 7 is - clamped elimination of the bearing clearance of the pivot bearing 4 and 5 between the end faces of the stub shaft 18 and 22, whereby the spur gears 15 and 20 and 14 and 39 are engaged. The aspect ratios are such that - as already mentioned above - the end face 56 of the pot 51 keeps a distance from the annular flange 54 in this position. At the rotational movement of the painting cylinder 7, the helical compression spring 47 and ring 46 does not participate. This also applies to the screw-holding sleeve 27, the radial clamping means 29 and the pipe flange 30. Axialsicherung 49, pot 51, helical compression spring 50 and annular flange 54, however, take part in the rotational movement of the stub shaft 22 and thus of the painting cylinder 7. A decoupling takes place through the bearing 55 of the fixed holding device 24th

The radially biased in the working position of the painting cylinder 7 radial clamping means 29 ensures that the holding device 24 is held without play on the machine frame of the painting machine 3. The radial clamping means 29 can ensure that not only the necessary clearance between the screw-holding sleeve 27 and bearing support (pipe flange 30) is compensated (the aforementioned game is necessary because of the axial displacement), but also also eliminates bearing clearance in the cylindrical roller bearing 21 by the Außennng of the cylindrical roller bearing 21 is compressed by the acted upon by the radial clamping means 29 screw-holding sleeve 27. The cylindrical roller bearing 21 is not biased by itself, so that in the manner described above, a possible clearance is eliminated. Additionally or alternatively, however, it is also possible to form the cylindrical roller bearing 21 in play-free design, that is, it is biased by itself. If now a removal of the painting cylinder 7 take place, the pressure medium is turned off, ie, the annular cavity 31 is no longer subjected to pressure medium, whereby the radial clamping means 29 recedes radially outward and the screw-holding sleeve 27 releases such that these axially and the Rotary axis 32 can be moved. By means of the actuator, not shown, the adjusting rod 38 is moved with entrainment of the lever extension 37, such that the screw-holding sleeve 27 rotates about the axis of rotation 26 by a certain angle, which is smaller than 120 °. This has due to the curved slots 35 with the result that the screw-holding sleeve 27th axially displaced in the -x direction, with the result that the spur gears 15 and 20 and 14 and 39 are disengaged, since the shaft stub 22 is moved accordingly by the axial movement of the screw-holding device 25 Since now the stub shaft 22 no longer of the Painting cylinder 7 is acted upon axially, the force of the helical compression spring 47 causes the end face 56 of the pot 51 is lowered to the annular flange 54 and thereby an axially fixed position of the stub shaft 22 is achieved relative to the holding device 24. From the FIG. 4 is the end coupling position recognizable, ie, the pivot bearing 4 has been displaced so far axially away from the painting cylinder 7 together with the stub shaft 22 and the other associated facilities, so that it can be removed radially from the painting machine 3.

If a new painting cylinder to be used in the painting machine 3, the procedure is reversed, that is, this is introduced between the stub shafts 18 and 22, so that the axes of rotation 19, 9, 23 and 32 are aligned. Subsequently, the screw-holding device 25 is then pivoted about the actuator 38 at an angle such that an axial displacement of the pivot bearing 4 and the shaft stub 22 takes place, so that it comes to the coupling of the spur gears 15 and 20 and 14 and 39.

As a result of the screwing movement to be carried out according to the invention in the screw-holding device 25, a rotational movement is superimposed on the axial advancing movement of the stub shaft 22 for engaging the varnishing cylinder 7. This ensures that the opposite teeth of the spur gears 15, 20 and 14, 39 (Hirth teeth) of the stub shaft 18, 22nd and find the shaft ends 12, 13. This prevents that the tooth tips of the teeth exactly meet and remain in this position and thereby do not engage correctly. It is correct if each tooth tip meets on one side on a tooth base on the other side. By the mentioned rotational movement, therefore, find the teeth together better and allow (in the above-described, very rare case of the meeting of tooth tips) a sliding into each other It is so that when engaging (axial displacement of the bearing 4) first the stub shaft 22 is displaced until the spur toothing 39 meets the spur toothing 14 of the shaft end 12. Subsequently, the complete painting cylinder 7 is taken, that is, axially displaced until the opposite shaft end 13 meets the standing stub shaft 18 of the bearing 5 Now the stub shaft 22 and the painting cylinder 7 remain axially, while the screw-holding device 25 rotates even further and displaced axially. It follows from this moment an "overstroke" and a relative movement within the double row cylindrical roller bearing 21 by the outer ring of this cylindrical roller bearing 21 further performs the screwing, while the inner ring does not rotate. The Zylinderwälzkörper now perform simultaneously a rotational movement (triggered by the rotational movement of the outer ring) and a sliding movement in the axial direction. Only such a sliding movement without simultaneous, caused by the invention rotation would permanently damage the running surfaces of outer and inner ring. Only because of the procedure according to the invention by the simultaneous rotational movement is such a displacement movement possible without bearing damage.

The above-described displacement movement within the cylindrical roller bearing 21 is still advantageous for the following reasons. The tolerance range of the painting cylinder width and the bearings must be covered by the aforementioned "overstroke". Otherwise, a secure connection between the stub shafts 18, 22 and the shaft ends 12, 13 would not be given in all possible cases. For a secure coupling connection, a frictional connection is established in addition to the pure positive locking of the toothings, in order to be able to absorb occurring impacts, in particular in the radial direction. This is achieved by the axial bias against the painting cylinder 7. The painting cylinder 7 is-as described- clamped between the bearings. This is achieved by the mentioned "overstroke", which then begins as soon as the helical compression spring 47 exerts axial force on the painting cylinder 7. While the screw-holding device 25 moves even further axially, the stub shaft 22 is pressed against the prestressed helical compression spring 47. By the clamping force of the helical compression spring 47 and the additional force due to the spring compression axial clamping force is applied to the system stub shaft painting cylinder. The end face 56 of the pot 51 lifts off from the annular flange 54 at the beginning of the overstroke, so that the in FIG. 2 shown gap arises.

Claims (18)

1. Bearing- and coupling device for an insertable and/or removable cylinder (6) of a coating- or printing machine, having two pivot bearings (4, 5), which may be associated with the two end regions (10, 11) of the cylinder (6) and at least one of which for the purpose of inserting and/or removing the cylinder (6) is axially displaceable and disposed on a holding device (24), characterized in that the axially displaceable pivot bearing (4) for an axial displacement effected by rotation is disposed coaxially on a screw-type holding device (25), which forms the holding device (24) and in the course of its displacement by rotation simultaneously executes an axial displacement.
2. Device according to claim 1, characterized in that one of the pivot bearings (4, 5) is axially displaceable and the other of the pivot bearings (5, 4) is disposed in an axially fixed manner.
3. Device according to one of the preceding claims, characterized in that the axially displaceable pivot bearing (4) is accommodated in a screw-type holding sleeve (27) that forms the screw-type holding device (25).
4. Device according to one of the preceding claims, characterized in that mounted in the pivot bearings (4, 5) are shaft stubs (18, 22), to which the cylinder (6) may be axially coupled.
5. Device according to one of the preceding claims, characterized in that the shaft stub (22) associated with the axially displaceable pivot bearing (4) is displaced axially by axial displacement of the pivot bearing (4).
6. Device according to one of the preceding claims, characterized in that the coupling between shaft stub (18, 22) and cylinder (6) is effected by means of a face gearing (14, 39; 15, 20).
7. Device according to one of the preceding claims, characterized in that the screw-type holding device (25) is supported by means of a cam guide (36) on the machine frame of the coating- or printing machine.
8. Device according to one of the preceding claims, characterized in that the cam guide (36) is a slotted pin guide or a slotted roller guide.
9. Device according to one of the preceding claims, characterized in that a plurality of cam guides (36) are provided arranged offset at an angle relative to one another.
10. Device according to one of the preceding claims, characterized in that one of the two pivot bearings (4, 5) is axially biased.
11. Device according to one of the preceding claims, characterized in that the holding device (24) of the axially displaceable pivot bearing (4) is held free of clearance by radial clamping means (29).
12. Device according to one of the preceding claims, characterized in that the radial clamping means (29) are formed by a radial clamping sleeve.
13. Device according to one of the preceding claims, characterized in that for a radial elastic deformability of the radial clamping means (29) the radial clamping means may be acted upon by a pressure medium.
14. Device according to one of the preceding claims, characterized in that the pressure medium is a compressed gas or a pressure liquid.
15. Device according to one of the preceding claims, characterized in that the radial clamping means (29) in the clamped state act in such a way upon the pivot bearing (4) that a possible bearing clearance is eliminated.
16. Device according to one of the preceding claims, characterized in that the radial clamping means (29) are automatically activated immediately following the screw motion of the screw-type holding device (25).
17. Device according to one of the preceding claims, characterized in that in the tightened state of the holding device (24) the inserted cylinder (6) is clamped axially between the shaft stubs (18, 22) through the action of a helical compression spring (47).
18. Device according to one of the preceding claims, characterized in that the cylinder (6) is a coating cylinder (7) of a coating machine.

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