EP0588188B1 - Device for engaging and disengaging the inking unit drive and the dampening unit drive - Google Patents

Abstract

The invention relates to a device for engaging and disengaging the inking unit drive and the damping unit drive on rotary printing machines and comprises the features described below. A control hub (13), which is mounted in a freely accessible manner on at least one printing unit (1), can be switched into a plurality of catch positions (I, II, III). A securing movement of the control hub (13), which precedes a switching movement of the control hub (13), can be detected via a sensor system (16). A control shaft (11) is provided with a cam piece (12) whose profile is scanned continuously by scanning devices (17, 18). The switching movement of the control hub (13) is converted by transmission elements (9, 10) into an axial movement of a slide bush (3). <IMAGE>

Description

The invention relates to a device for engaging and disengaging the ink and dampening unit drive on rotary printing presses.

The coupling and uncoupling of the inking or dampening unit drive - for example for one-sided printing on a material web - has already been practiced. However, coupling takes place directly on the clutch wheel after exposure of a side wall on the respective printing unit. Electrically definable monitoring of the individual clutch modes was omitted.

DE 28 19 257 C3 shows a device for releasing or locking the pivoting movement of a lifting roller which can be actuated by a control cam. In this device, two firmly connected eccentrics are fastened on a selector shaft, on each of which a pawl is mounted, which can be brought to a lifter shut-off lever in an operative position. This device is not secured, both in terms of the individual shift positions of the shift shaft and in terms of actuating the device immediately before the shifting process. As described, the selector shaft is only secured against being pulled out by a locking ring.

A device for engaging and disengaging the ink and dampening unit drive on rotary printing presses is known from document EP-A-0 444 225.

The disadvantages inherent in the prior art are eliminated by the solution according to the invention.

The invention has for its object to further develop a device for disengaging and engaging ink and dampening unit drive such that the respective switching positions of the device for disengaging and engaging can be monitored electrically and operating errors do not result in consequential damage.

• eine an mindestens einem Druckwerk frei zugänglich gelagerte Schaltnabe ist in mehrere Rastpositionen schaltbar;
• eine einer Schaltbewegung der Schaltnabe vorhergehende Sicherung bzw. Entsicherungsbewegung der Schaltnabe ist über eine Sensorik erfaßbar;
• eine Schaltwelle ist mit einem Kurvenstück versehen, dessen Profilierung kontinuierlich von Tasteinrichtungen abgetastet ist, und
• die Schaltbewegung der Schaltnabe wird durch Übertragungselemente in einer Axialbewegung einer Schiebebüchse umgewandelt.

According to the invention, this object is achieved by the following features:

• a shift hub mounted freely accessible on at least one printing unit can be switched into several latching positions;
• a securing or unlocking movement of the shifting hub preceding a shifting movement of the shifting hub can be detected via a sensor system;
• a switching shaft is provided with a curve piece, the profile of which is continuously scanned by scanning devices, and
• the shifting movement of the shifting hub is converted by transmission elements into an axial movement of a sliding bush.

The advantages of the solution according to the invention include the fact that no component disassembly is required to actuate the coupling. Thanks to the free accessibility, the device can be easily operated from outside the printing unit. The unlocking movement preceding a pivoting movement of the shift hub is monitored by sensors, so that the machine is automatically stopped when such a movement is detected. Then the device for disengaging and engaging can be actuated without further ado. Since the position of the selector shaft and thus the operating mode of the inking and dampening unit is continuously monitored, that is to say also between the detent positions, and is sensed by scanning devices by means of a curve piece provided on the selector shaft, redundancy is provided. Both from the position of the shift hub and the electrical one Rotation position of the switching shaft corresponding pulse, the operating mode of the device according to the invention can be determined. The conversion of the rotational movement of the shift hub into a translatory movement of the sliding bush also allows low actuating forces.

Further features of the device according to the invention are laid down in the following claims. It is provided in a further embodiment of the idea on which the invention is based that the shift hub is received on sliding bushes of the shift shaft. With a simultaneous rotational movement that can be transmitted by positive locking, the sliding bushes can be used to secure or unlock the shifting hub in the axial direction.

It is also provided that the unlocking movement of the shift hub takes place counter to the action of restoring elements. This ensures that the machine operator does not attempt to start the machine in an undefined switching state of the device for engaging and disengaging. If the locking pin is not received in a locking hole corresponding to it on the circumference of the shift hub, the sensor system recognizes this, since the distance between the shift hub and the sensor system is greater than in the locked state. The reset elements force the machine operator to perform a complete actuation process; otherwise the machine cannot be restarted after a switching operation.

It is envisaged that the locking pins corresponding to the locking positions on the printing unit snap into locking bores of the shifting hub with spring support. This enables a defined switching status to be achieved. Furthermore, a ring gear is rotatably mounted on the sliding bush. This allows the actuating forces to be applied to actuate the device for engaging and disengaging to be kept low. At a Axial displacement of the sliding bushing initially removes the tooth engagement between the ring gear and a drive tap for an inking unit, while upon further axial displacement of the sliding bushing the tooth engagement between the ring gear and a drive tap for a dampening unit is canceled.

The solution according to the invention is explained in detail below with reference to a drawing.

Fig. 1

eine Draufsicht auf die erfindungsgemäße Einrichtung mit schematisch angedeuteten Druckwerkwänden,

Fig. 2

einen Längsschnitt durch die Einrichtung gemäß Fig. 1,

Fig. 3

einen Querschnitt durch die Einrichtung gemäß des Schnittverlaufes III-III aus Fig. 2,

Fig. 4

einen Querschnitt gemäß Schnittverlauf IV-IV in Fig.2 und die

Fig. 5 u. 6

verschiedene Schaltzustände der Einrichtung zum Ein- und Auskuppeln.

It shows:

Fig. 1

2 shows a plan view of the device according to the invention with schematically indicated printing unit walls,

Fig. 2

2 shows a longitudinal section through the device according to FIG. 1,

Fig. 3

3 shows a cross section through the device according to the section line III-III from FIG. 2,

Fig. 4

a cross-section according to section IV-IV in Figure 2 and the

Fig. 5 u. 6

different switching states of the device for engaging and disengaging.

Fig. 1 shows a plan view of the device according to the invention with schematically indicated printing unit walls.

In a side wall of a printing unit 1, a pin 2 is received, on which an axially displaceable sliding bush 3 is mounted. There is a lever 4 on the sliding bush 3. On the sliding bush 3 there is a ring gear 5, which in Needle bearings 6 is mounted, rotatably added. According to its axial position on the pin 2, the ring gear 5 is in engagement with a drive tap 7 for an inking unit or with a drive tap 8 for a dampening unit or with the two drive taps 7 u. 8 at the same time. The drive flow to the inking and dampening unit of a printing unit 1 can therefore be interrupted on the ring gear 5.

The lever 4 received on the circumference of the sliding bush 3 is in turn connected to a lever 9 which is articulated to a link piece 10 which has an eccentric extension. The articulation piece 10, secured by a cylindrical pin connection, is connected to a selector shaft 11. The switching shaft 11 passing through a side wall of a printing unit 1 is provided with a non-rotatable curve piece 12, which has a profiling. Furthermore, on the side wall of the printing unit 1, a sensor system 16 and a plurality of locking bolts 15 are accommodated, which interact with the shift hub 13 fastened on the shift shaft 11. A hand lever 14 is provided for actuating the shift hub 13. If the shift hub 13 is in a locked position on one of the locking bolts 15, the distance between the sensor system 16 and the shift hub 13 is shown in accordance with FIG. 1. The supply circuit of the machine is closed, the machine is running. If a printer grasps the hand lever 14 while the machine is running, the shift hub 13 must be pulled in the axial direction, that is to say unlocked, in order to subsequently rotate the shift hub 13. The change in distance that occurs during the unlocking axial movement is registered by the sensor system 16 and the machine is stopped.

FIG. 2 shows a longitudinal section through the device according to FIG. 1.

A bushing 19 is fastened in the schematically illustrated side wall of a printing unit 1, in which the selector shaft 11 is guided. At one end of the control shaft 11, the articulation piece 10 is secured by a pin 27. As already explained, the articulation piece 10 is articulated with a lever 9.
In the area of the socket 19, a plate 25 is provided on the side wall of the printing unit 1, shown schematically here, to which scanning devices 17 and 18 are fastened. In the area of the scanning devices 17 and 18, the selector shaft 11 guides a cam piece 12, which is fastened in a rotationally fixed manner by means of a pin 26. Furthermore, sliding bushes 20 and 21 are arranged on the selector shaft 11, which enable an axial movement of the selector hub 13. A spring 22 is provided within the shift hub 13 between the sliding bush 21 and a stop 23 designed as a ring. Furthermore, the shift hub 13 is positively connected to the shift shaft 11 by the parallel key 24. The shift hub 13, which partly lies within the side wall cover, is also provided with a hand lever 14. To change the switching position of the switching hub 13, the printer has to move the switching hub 13 in the axial direction, since the latched-in locking pin 15 otherwise does not permit rotation. Contrary to the restoring force exerted by the spring 22 and after the corresponding locking bore has been released, the shift hub 13 can be rotated. The locking pin 15 slides during the rotational movement of the shift hub 13 on the end face of the shift hub 13 and thus keeps it at a distance, so that the sensor 16 explained in FIG. 1 prevents the machine from restarting as long as the shift hub 13 is not engaged. During the rotation of the shift hub 13, the feelers 17 and 18 scan the contour of the profiled curve piece 12. In this way, the rotational position of the control shaft 11 and thus the coupling position of the sliding bush 3 can be transmitted electrically to the machine control center. In addition to the electrical Detection of the switching state via limit switches provided in the pushbuttons 17 and 18, the operating state of the device for engaging and disengaging can also be read from the position of the hand lever 14 in relation to the switching symbols attached to an operating plate 28.

Fig. 3 shows a cross section through the device according to the section III-III in Fig. 2 again.

On the plate 25, two scanning devices 17 and 18 are fastened opposite one another, the probe tips of which are guided on the contour of the curve piece 12. The contour of the curve piece 12 has an approximately 180 ° depression on the circumference of the curve piece 12. A detent depression for a probe tip is provided on the circumferential segment of the curve piece 12 opposite this depression and raised relative to it. A locking bolt 15 is screwed to the plate 25 and engages in locking bores on the end face of the shift hub 13. The cam piece 12 is mounted on the selector shaft 11 in a rotationally fixed manner by means of the cylindrical pin 26.

FIG. 4 shows a cross section corresponding to the section IV-IV in FIG. 2.

The hand lever 14 of the shift hub 13 is at right angles to the articulation piece 10, which is connected to the selector shaft 11 in a rotationally fixed manner with the cylindrical pin 27. The feather key 24 brings about a positive connection of the shift hub 13 with the shift shaft 11 such that an axial movement of the shift hub 13 on the sliding bushes 20 and 21 of the shift shaft 11 remains possible.

Figures 5 and 6 show different switching states of the device for engaging and disengaging.

In FIG. 5, the hand lever 14 of the shift hub 13 is in position I. Linking piece 10 and lever 9 assume the position which is also shown in the top view in FIG. 1. Position I accordingly shows the switching state of the device for engaging and disengaging, in which both the drive tap 7 for an inking unit and the drive tap 8 for a dampening unit are in engagement with the ring gear 5 mounted on the sliding bush 3, and are therefore driven.

6 shows two other switching states of the device according to the invention.

The position of rotation II, indicated by dashed lines, of the hand lever 14 and shift hub 13 shows this in a position pivoted by approximately 90 ° compared to the position from FIG. 5. The link piece 10 and lever 9 also assume changed positions. In position II, the inking unit is disengaged, the sliding bush 3 has been moved out of the pin 2 from the pressure side wall, whereby the engagement between the ring gear 5 and drive tap 7 is canceled for an inking unit; the inking unit is therefore in the disengaged state. With a further pivoting movement of hand lever 14 and shift hub 13 by 90 °, position III is reached. The articulation piece 10 and the lever 9 assume the positions carried out with solid lines; in this case an extended position of lever 9 and articulation piece 10. Transferred to the arrangement shown in FIG. 1, this means that the sliding bush 3 is displaced further from the printing unit side wall, so that the drive tap 8 for a dampening unit is now also interrupted.

In position III, both the inking unit and the dampening unit are separated from the drive, while in position II, only the inking unit is disengaged. These switching states can only be changed when the machine is at a standstill, should this condition not be met, the machine is automatically stopped by the axial movement detected by the sensor system 16, which precedes the actual switching movement, so that a circuit change can be carried out.

REFERENCE SIGN LIST

1

Printing unit

2nd

Cones

3rd

Sliding bush

4th

lever

5

Sprocket

6

Needle bearing

7

Drive tap (inking unit)

8th

Drive tap (dampening system)

9

lever

10th

Hinge piece

11

Selector shaft

12th

Curve piece

13

Shift hub

14

Hand lever

15

Locking bolt

16

Sensors

17th

Push button

18th

Push button

19th

Rifle

20th

Sliding bush

21

Sliding bush

22

feather

23

attack

24th

adjusting spring

25th

plate

26

Dowel pin

27

Dowel pin

28

Control plate

I.

Rest position

II

Rest position

III

Rest position

Claims (6)

1. Apparatus for coupling and uncoupling an inking and dampening mechanism drive in rotary printing machines, which has the following features:

   1.1. a control hub (13) mounted for free access on at least one printing mechanism (1) can be moved to a plurality of lock-in positions (1, II, III);

   1.2. a locking and unlocking movement of the control hub (13) which precedes a control movement of the control hub (13) can be detected by a sensor system (16);

   1.3. a control shaft (11) is provided with a cam portion (12), the profiling of which is continuously sensed by sensing devices (17, 18), and

   1.4. the control movement of the control hub (13) is converted by transmission elements (9, 10) into an axial movement of a sliding bush (3).
2. Apparatus for coupling and uncoupling an inking and dampening mechanism drive according to Claim 1, characterized in that the control hub (13) is received in sliding bushes (20, 21) of the control shaft (11).
3. Apparatus for coupling and uncoupling an inking and dampening mechanism drive according to Claim 1, characterized in that the unlocking movement of the control hub (13) is made against the action of restoring elements (21, 22, 23).
4. Apparatus for coupling and uncoupling an inking and dampening mechanism drive according to Claim 1, characterized in that catch bolts (15) on the printing mechanism, which correspond to the lock-in positions (I, II, III), engage, with spring assistance, in catch bores in the control hub (13).
5. Apparatus for coupling and uncoupling an inking and dampening mechanism drive according to Claim 1, characterized in that a ring gear (5) is mounted rotatably on the sliding bush (3).
6. Apparatus for coupling and uncoupling an inking and dampening mechanism drive according to Claim 5, characterized in that on the axial displacement of the sliding bush (3) initially the engagement between the ring gear (5) and a drive take-off (7) for an inking mechanism is released and, on further axial displacement of the sliding bush (3) the engagement between the ring gear (5) and a drive take-off (8) for a dampening mechanism is released.

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