EP0578960A1 - Device for the remote control of the grippers of a turning device - Google Patents

Abstract

The invention relates to a device for the remote control of clamping members of a turning device, in particular in sheet-conveying cylinders and on side walls of rotary printing machines. The turning device has at least a turning drum, a storage drum and adjustable toothed segments. These components, in turn, comprise clamping elements by means of which, by the action of a prestressing force, a clamping connection is produced and maintained between power transmission elements which are adjustable relative to one another and between control elements. Actuators (20, 24; 46, 48) which can be acted upon by a pressure medium are arranged on movable, at least integral pressure levers (9, 32, 39). Said actuators move a transmission element (13, 32a, 40, 45) in such a way that clamping produced by power accumulators (12) becomes ineffective. <IMAGE>

Description

The invention relates to a device for the remote-controlled actuation of clamping members of a turning device, in particular on sheet-guiding cylinders and on the side walls of rotary printing presses.

A device for adjusting the rotational position of a cylinder of a turning device and for axially displacing an actuator for converting the gripper control on this cylinder of a sheet-fed rotary printing press is known from the prior art DE 38 14 831 C1. In this device, which can be operated manually, a threaded sleeve designed with a socket wrench is rotated in order to reduce or completely eliminate the clamping force exerted on the pressure lever by a spring assembly via a pressure ring. Furthermore, depending on the axial position of the threaded sleeve, a double lever, which can be actuated via an annular groove, serves to interrupt the supply circuit when the clamping between the fixed and adjusting gear is removed and to close the supply circuit when the clamping between the fixed and adjusting gear is restored. A disadvantage of this device is the fact that on the one hand manual operation is required to release the clamp, and on the other hand that an electrical circuit is interrupted mechanically.

In a further development of the prior art, the object of the present invention is to create the conditions for a remotely controllable clamping device made of standardized, compact components.

According to the invention the object is achieved in that actuators which can be acted upon by pressure medium are arranged on movable, at least one-piece push rods which move a transmission element in such a way that the clamps generated by energy accumulators become ineffective.

The advantages that can be achieved with this solution are that it is now possible to integrate clamping devices on a turning unit in a system for remote machine control. If all components - for example a turning device - are equipped with the device according to the invention, simultaneous remote control of different components can take place, so that the set-up times when changing from perfect to perfect and reverse printing are drastically reduced. In a further embodiment of the idea on which the invention is based, when the actuating cylinder is acted upon by pressure medium, a pressure chamber is formed between annular boundary surfaces. No separate prechamber is required to build up pressure, which is why the actuators are particularly compact; Furthermore, the volume of the medium required to build up pressure can be kept small. A further embodiment of the solution according to the invention provides that the movable, at least one-piece push rods are rotatably received by actuators which can be pressurized to be fixed against rotation. A particular advantage is the fact that there is no need for a separate rotating union to be provided separately, which does not inconsiderably reduce the manufacturing costs. No rotational movements occur in the area of the components delimiting the pressure chamber, so that there are no sealing and leakage problems.

In a further embodiment of the solution according to the invention it is provided that bearing elements can be inserted into the actuators which can be pressurized. This means that they can be used on both rotating and non-rotating push rods without changing the geometry of the actuators. This means that they can be used universally and can be produced in large numbers, which reduces manufacturing costs.

A further embodiment of the idea on which the invention is based provides that the actuators which can be acted upon by pressure medium are received directly by a movable, at least one-part pressure rod. In these embodiments, separate bearing elements can therefore be dispensed with, while the configuration of the actuators can be retained for this application.

Another solution fulfilling the object of the invention provides that actuators which can be actuated indirectly by a pressure medium are arranged on a movable, at least one-part push rod and move a transmission element in such a way that the clamps generated by the energy store become ineffective. Since actuators that can be actuated indirectly via a pressure medium are used, small and compact hydraulic or pneumatic actuators can be used by appropriately dimensioning the components with regard to pressure areas and leverage ratios - which are representative of other parameters. One embodiment of this solution concept provides that the actuator which can be actuated indirectly via a pressure medium receives an eccentric bolt which is connected to an actuating cylinder via a lever. In this variant, the periphery of the pressure generation can be attached outside the clamp to be actuated.

A further development of this solution concept provides for an axially movable, at least one-piece push rod which is rotatably mounted in a bolt holder. Furthermore, the bolt holder has a radial bearing and is supported by an axial bearing when the eccentric bolt is turned at a stop. The spring force of an energy accumulator can be removed with a minimal switching force applied at the end of a lever, but a small actuating force, so that an adjustment operation can be carried out.

The invention is subsequently explained in detail using a drawing.

• Fig. 1 einen Schnitt durch druckmittelbeaufschlagbare, ferngesteuert betätigbare Stellglieder auf einer rotierenden Druckstange,
• Fig. 2 einen Schnitt durch eine an einer Speichertrommel angeflanschte Vorrichtung zur ferngesteuerten Betätigung von Klemmelementen,
• Fig. 3 einen Schnitt durch eine Vorrichtung zur ferngesteuerten Betätigung einer Klemmung für ein Zahnsegment, welches an der Seitenwand einer Rotationsdruckmaschine gelagert ist,
• Fig. 4 einen Schnitt durch eine pneumatisch beaufschlagbare Vorrichtung,
• Fig. 5 eine Schnitt durch mittelbar über ein Druckmedium betätigbare Stellglieder,
• Fig. 6 die Draufsicht auf eine Vorrichtung gemäß Fig. 5.

It shows:

• 1 shows a section through actuators which can be acted upon by pressure medium and actuated remotely on a rotating pressure rod,
• 2 shows a section through a device flanged to a storage drum for the remote-controlled actuation of clamping elements,
• 3 shows a section through a device for the remote-controlled actuation of a clamp for a tooth segment, which is mounted on the side wall of a rotary printing press,
• 4 shows a section through a pneumatically actuated device,
• 5 shows a section through actuators which can be actuated indirectly via a pressure medium,
• 6 is a top view of a device according to FIG. 5.

Fig. 1 shows a section through pressure-actuated, remotely actuated actuators on a rotating pressure rod. To maintain the frictional connection between a fixed gear 1 and an adjusting gear 3, these are clamped against one another by means of pressure levers 5. The pressure levers 5 press the adjusting gear 3 received by a pin attachment 2 against a fixed gear; they act on the ring surface 4. The pressure levers 5 are supported on a support plate 7 which is screwed to the pin extension 2 by screws 6. The pressure levers 5, which are subdivided into a short and a long lever arm, each rest on a disk 11 with the lower lever arm. Between the disc 11 and a shoulder 9a of a push rod 9, a package of springs 12 is arranged, which generates the pretensioning force necessary to maintain the clamping. On the one hand, this acts on the lower lever arms of the pressure levers 5, as a result of which these are supported on the support plate 7 via a cam on the rear of the pressure levers 5. Via the short lever arm of the pressure lever 5, the fixed gear 1 and the adjusting gear 3 are clamped against one another with an increased clamping force corresponding to the lever ratios. On the other hand, a pressure lever 8c is provided in the interior of a cylinder 8 and is mounted on a hinge pin 8d. If the push rod 9 presses against the push lever 8c, it clamps the adjusting slide 8a in position on the cylinder 8 via the pull bolt 8b.

At the end of the push rod 9 there are two nuts 15, 16, of which the nut 15 forms a stop which is secured by the lock nut 16. A piston 20 is accommodated on the push rod 9 by an axial bearing 17 and a radial bearing 19, which piston is accommodated in a housing 24 in a rotationally fixed but axially displaceable manner. The housing 24 accommodates an axial bearing 18 in a recess on the push rod side and is connected in a rotationally fixed manner to the side wall of the machine via an anti-rotation device 25. A pressure sleeve 13, which is movable in the axial direction on the push rod 9, bears against a ring of the axial bearing 18. There is play between the end of the spring pack side and the shoulder 10 of the push rod 9, which allows the switching path 14. The housing 24 has an annular groove 21, in which a sealing element 22 is embedded. The boundary wall 23 of the piston 20 forms a boundary of a pressure chamber 30. The housing 24 has a feed line 26 for a pressure medium and has a further sealing element 27 which, together with the sealing element 22, the pressure chamber 30 between the components 20, piston 20, which are movable relative to one another and housing 24, seals and allows pressure to build up. With its boundary surface 28, the housing 24 completes the pressure chamber 30, which runs in an annular manner between the piston 20 and the housing 24 and is acted upon by a pressure medium via the feed line 26. The recess for receiving the axial bearing 18 is limited by the projection 29 on the housing 24.

Since the pressure medium is supplied through the non-rotatable but axially displaceable housing 24, there is no need to use a complex rotary leadthrough, which usually also brings about sealing problems. In the solution according to the invention, the pressure build-up takes place between two non-rotatably arranged components, namely the piston 20 and the housing 24, the sealing of which from one another is not a problem. When a pressure medium is applied, an overpressure builds up in the pressure chamber 30 formed by the boundary surfaces 23 and 28. The piston 20 is supported by the axial bearing 17 on the stop 15, which is secured by the lock nut 16. At the same time, the housing 24 moves towards the spring assembly 12 in the axial direction, corresponding to the build-up of the excess pressure in the pressure chamber 30. Via the axial bearing 18, the displacement of the pressure sleeve 13 corresponding to the displacement path of the housing 24, which abuts the disk 11, takes place. As soon as the switching path 14 is bridged, the pressure sleeve 13 rests on a shoulder 10 of the pressure rod 9, which receives the springs 12. At the same time with the system of the pressure sleeve 13 on the shoulder 10 of the pressure rod 9, the bias generated by the springs 12 is canceled via the likewise axially displaceable disc 11; the pressure levers 5 and 8c are thus relieved. Now the rotational position of the adjusting gear 3 can be adjusted relative to the fixed gear 1 and the adjusting slide 8a can be adjusted. The machine is protected during the changeover phase by a pressure switch integrated in the supply line 26 of the pressure medium, which keeps the supply circuit interrupted in the pressure build-up, so that the machine does not start up when the clamp is open. A limit switch linkage can thus be omitted.

Fig. 2 shows a section through a device flanged to a storage drum for the remote-controlled actuation of clamping members.

In order to clamp a jacket 31 of a storage drum 31 against a stop 31b arranged on the journal of the storage drum 31, a package of springs 12 is supported on a housing 35. The housing 35 is flanged to the storage drum 31 by means of screws 34. The spring assembly presses a push rod 32 via a shoulder 32a against a - with respect to a cam for support - longer lever arm of a pressure lever 33. The shorter lever arm of the pressure lever 33 clamps the jacket 31 a of the storage drum 31 against the stop 31 b on the pin of the Storage drum 31 is attached.

The piston 20 and the housing 24 are accommodated on the push rod 32 via the axial bearings 17 and 18 and the radial bearing 19 - analogously to the illustration shown in FIG. 1. The piston 20 is supported on the axial bearing 17 on the stop 15, which is secured by a lock nut 16. The housing 24 connected to the side wall by the anti-rotation device 25 receives the piston 20 in a rotationally fixed but axially displaceable manner. The pressure chamber 30 is formed by two annular boundary surfaces 23 and 28 of the piston 20 and the housing 24, respectively. The pressure chamber 30 is suitably sealed by the sealing element 22 in the annular groove 21 of the piston 20 on the one hand and by the sealing element 27 of the housing 24 on the other hand for a pressure build-up.

When pressure is applied to the pressure chamber 30 via the supply line for pressure medium 26, the piston 20 moves out of the housing 24 in this embodiment and is in contact with the stop 15 of the pressure rod 32 at the beginning of the pressure purchase construction. When the pressure is increased further, the push rod 32 is moved to the left until after the travel 14 has been covered, the shoulder 32a of the push rod 32 bears against a stop in the housing 35. Thus, the pressure lever 33 is relieved at its lower end and the clamping between the jacket 31 a and the stop 31 b of the storage drum 31 is released. An adjustment can now be made.

A comparison with FIG. 1 shows that the geometries of the actuators, that is to say the piston 20 and the housing 24, are identical; this results in a universal usability of these components when used on several components of a turning device. Furthermore, when the storage drum and the turning drum are equipped with the device according to the invention, a simultaneous actuation of several components can be achieved. In addition, the embodiments shown in FIGS. 1 and 2 can also be used to retrofit machines with the device according to the invention, which have already been delivered, so that the rotary rationalization potential inherent in the device according to the invention can be used with these delivered rotary printing machines.

3 shows a section through a device for the remote-controlled actuation of a clamp for a tooth segment, which is adjustably mounted on the side wall of a rotary printing press.

In this embodiment, a bell-shaped body 36 - or a correspondingly shaped bracket - is located on the side wall 38 of a rotary printing press. The bell-shaped body 36 can be fastened to the side wall 38 by screws 37; in order to save installation space, it can also be embedded in the latter, whereby a shortening of the push rod segment 39 can be achieved. There is a shoulder 40 on the push rod segment 39. At least one spring 12 is accommodated on the push rod segment 39 between the shoulder 40 and a stop 41 fixed to the housing, which limits the adjustment path 14. The piston 20 is connected to the bell-shaped body 36 by screws 44, while the housing 24 is centered on the end of the push rod segment 39 and rests with a shoulder on the shoulder 40.

The push rod segment 39 is provided on its rear part facing the toothed segment 43 with a nose 42 which, when the push rod segment 39 moves in the axial direction, clamps the toothed segment 43 to the side wall 38 or releases it for adjustment.

When pressure is applied to the pressure chamber 30 formed by the annular boundary surfaces 23 and 28, the housing 24 moves away from the piston 20 in the axial direction. The abutment of the housing 24 on the shoulder 40 of the pressure rod segment 39 causes the springs 12 to compress when the pressure segment 39 is axially displaced by pressurizing the pressure chamber 30. With axial displacement Exercise of the push rod segment 39, the nose 42 releases the toothed segment 43, which can then be adjusted. When the chamber 30 is relieved of pressure, the nose 12 is pressed against the toothed segment 44 by the springs 12, as a result of which its swivel position is locked. When pressure is applied to the pressure chamber 30, the switching path 14 is determined by the stop 41. The short switching path in this configuration can be extended to longer switching paths in other structural applications of the device according to the invention. As already mentioned in the explanations for FIGS. 1 and 2, pistons 20 and housing 24 are provided with sealing elements 22 and 27 which are received by annular grooves in order to ensure the pressure build-up in the pressure chamber.

In the embodiments shown in FIGS. 1 to 3, installation cases for the housing 24 and the piston 20 are shown, which are received in them by rotating pressure rods 9, 32 via bearing elements, while in FIG. 3 an arrangement on a non-rotating pressure rod segment 39 is shown. This shows the universal usability of the actuators, which allow the equipping of several components of a turning device, and their simultaneous remote control at the push of a button.

Fig. 4 shows a section through a pneumatically actuated device. Deviating from the previously described embodiments of the device according to the invention, components with larger pressure chamber boundary surfaces are shown in this variant. A rotating pressure rod 9 is rotatably received in a housing 48 via radial bearings 19, while a piston 46 acts on a pressure sleeve 45 via an axial bearing 47. The pressurization of the pressure chamber 30, on the one hand, causes the housing 48 to rest against the stop 15 via the axial bearing 17, while, on the other hand, the piston 46 moves the pressure sleeve 45 against the disk 11 via the axial bearing 47. After displacement of the pressure sleeve 45 by the distance of the switching path 14, the load applied by the springs 12 to the pressure lever 5 is released and the rotational position of the adjusting gear 3 can be adjusted.

This variant is intended for large-scale applications in which compressed air is already used in the periphery and there is sufficient installation space. In this variant, the possible uses are considerably expanded by a combination with a hydraulically loadable variant.

FIGS. 5 and 6 finally show a section or a top view of actuators which can be actuated indirectly via a pressure medium.

On a rotating push rod 49, a pin bearing 52 is rotatably supported by radial bearings 19. Furthermore, an axial bearing 17 is provided between a threaded ring 50 and the bolt bearing 52. The pin bearing receives an eccentric pin 53 via roller bearings, which is equipped with a roller 54 on each end. In the middle, the eccentric bolt 53 is provided with a lever 55, at the end of which there is an adjusting movement by a commercially available adjusting cylinder 56. An actuating body 51 is centered on the pin bearing 52, the eccentrically mounted rollers 54 abutting on its end faces. In order to secure the threaded ring 50 against rotation during assembly by means of a pin, bores 57 are provided in the actuating body 51 and in the pin bearing 52, which allow access to the threaded ring 50. When the lever 55 pivots, triggered by pressurizing the actuating cylinder 56, the eccentric bolt 53 is rotated. The rollers 54 act on the end faces of the actuating body 51 and move it - relative to the pin bearing 52 and the push rod 49 - in the axial direction. A thrust sleeve 13 is correspondingly axially displaced via the axial bearing 18, so that this - similar to the above-outlined versions - can release the preload of a spring assembly and release the execution of an adjustment operation. With a suitable choice of the lever ratios, 56 large actuating forces can be generated in this variant, which can be actuated indirectly via a pressure medium, with small actuating cylinders.

REFERENCE SIGN LIST

• 1 fixed gear
• 2 spigot
• 3 adjusting gear
• 4 ring surface
• 5 pressure levers
• 6 screws
• 7 support plate
• 8 cylinders
• 8a adjustment slide
• 8b draw bolts
• 8c push lever
• 8d hinge pin
• 9 push rod
• 9a push rod heel
• 10 paragraph
• 11 disc
• 12 spring
• 13 pressure sleeve
• 14 shift travel
• 15 stop
• 16 lock nut
• 17 thrust bearings
• 18 thrust bearings
• 19 radial bearings
• 20 pistons
• 21 ring groove
• 22 sealing element
• 23 boundary surface
• 24 housing
• 25 anti-rotation device
• 26 Supply line for pressure medium
• 27 sealing element
• 28 boundary surface
• 29 head start
• 30 pressure chamber
• 31 storage drum
• 31 a coat
• 31 b stop
• 32 push rod segment
• 32a paragraph push lever
• 33 push lever
• 34 screws
• 35 housing
• 36 bell
• 37 screw
• 38 side wall
• 39 push rod segment
• 40 paragraph
• 41 stop
• 42 nose
• 43 tooth segment
• 44 screw
• 45 pressure sleeve
• 46 pistons
• 47 thrust bearings
• 48 housing
• 49 push rod
• 50 threaded ring
• 51 actuators
• 52 Pin bearing
• 53 eccentric bolts
• 54 roll
• 55 levers
• 56 actuating cylinders
• 57 holes

Claims (13)

1.Device for the remote-controlled actuation of clamping members of a turning device, in particular in sheet-guiding cylinders and on rare walls of rotary printing presses, the turning device having at least one turning drum, a storage drum and adjustable toothed segments and these components comprise clamping elements, by means of which a clamping connection is applied by applying a pretensioning force is generated and maintained between force transmission elements that are adjustable relative to each other and between control segments,
characterized,
that actuators (20, 24; 46, 48) which can be acted upon by pressure medium are arranged on movable, at least one-piece push rods (9, 32, 39) and move a transmission element (13, 32a, 40, 45) in such a way that the force storage means (12 ) generated clamps become ineffective. 2. Device for the remote-controlled actuation of clamping members according to claim 1, characterized in that
that when the actuators (20, 24; 46, 48) are pressurized, a pressure chamber (30) is formed between annular boundary surfaces. 3. Device for the remote-controlled actuation of clamping members according to claim 2, characterized in that
that at least one pressure chamber (30) can be acted upon by actuators (20, 24; 46, 48) which can be pressurized via a feed line (26) which comprises a pressure switch. 4. Device for the remote-controlled actuation of clamping members according to claim 1, characterized in that
that the movable, at least one-piece push rods (9, 39) hold non-rotatably mounted actuators (20, 24; 46, 48) that can be pressurized with medium. 5. Device for the remote-controlled actuation of clamping members according to claim 4, characterized in that
that bearing elements (17, 18, 19; 47) can be used in actuators (20, 24; 46, 48) which can be pressurized. 6. Device for the remote-controlled actuation of clamping members according to claims 1 and 2,
characterized,
that the actuators (20, 24; 46, 48) which can be acted upon by pressure medium are received directly by a movable, at least one-piece pressure rod (9, 39). 7. Device for the remote-controlled actuation of clamping members according to claim 6, characterized in that
that the pressure medium-loaded actuator (24) rests on a movable at least one-piece push rod (39). 8. Device for the remote-controlled actuation of clamping members according to claim 7, characterized in that
that the pressurizable actuator (24) is centered and guided by the movable, at least one-piece push rod (39). 9.Device for the remote-controlled actuation of clamping elements of a turning device, in particular in sheet-guiding cylinders and on the side walls of rotary printing presses, the turning device having at least one turning drum, a storage drum and adjustable toothed segments and these components comprise clamping elements, via which a clamping connection between them is acted upon by a pretensioning force force transmission elements that can be adjusted relative to one another and between control segments are generated and maintained,
characterized,
that actuators (51, 52, 53) which can be actuated indirectly by a pressure medium are arranged on a movable at least one-piece push rod (49) and move a transmission element (13) in such a way that the clamps generated by the energy store (12) become ineffective. 10. Device for the remote-controlled actuation of actuators according to claim 9,
characterized,
that the actuator (52), which can be actuated indirectly via a pressure medium, receives an eccentric bolt (53) which is connected to an actuating cylinder (56) via a lever (55). 11. Device for the remote-controlled actuation of clamping members according to claim 9, characterized in that
that the movable, at least one-piece, push rod (49) is rotatably mounted in a pin bearing (52). 12. Device for the remote-controlled actuation of clamping members according to claim 10, characterized in that
that the eccentric bolt (53) receives a roller (54) at each end. 13. Device for the remote-controlled actuation of clamping members according to claim 11, characterized in that
that the pin bearing (52) has a radial bearing (19) and is supported on a stop (50) when the eccentric bolt (53) is rotated via an axial bearing (17).

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