EP1318964B1 - Adjusting element - Google Patents

Abstract

An adjusting device is mounted for rotation about a central axis and can be axially actuated. The adjusting device can be displaced or shifted between an inoperative position and at least one working position by an axially displaceable fluid-driven piston.

Description

Stepping element and ejector device

The invention relates to an actuator and an ejector device according to the Preamble of claim 1.

US 41 49 682 A, US 49 51 894 A and US 47 15 553 A are clamping domes Known for rotatable storage of paper web rolls, as they are Rotary printing machines are used. At the mandrels are each Ejector devices are provided with which the sleeve on which the paper web is wound, can be stripped from the mandrel. When introducing the Tension domes in the sleeve are provided on the ejector device Spring elements preloaded elastically. If the mandrel for changing the Retracted paper web from the sleeve, the bias of the spring elements ensures making sure the sleeve is ejected from the two by each other opposite straining domes is stripped.

A disadvantage of this type of design of the ejector device is that the force with of the sleeve can be stripped from the clamping dome, by the design of the Spring elements is limited. In addition, the preload of the spring elements at Inserting the mandrels into the sleeve can be overcome.

From DE 28 14 338 A1 a mandrel is known in which between the Stop flange of the dome and the sleeve is arranged a sliding ring can rotate together with the dome. To eject the sleeve is one Actuating device is provided which is fixedly attached to a frame. At the Actuators are provided with claws, the ring being in one position Claws, namely the rest position, can rotate freely and do not engage the claws is. When the actuating device is actuated, the claws are against the ring pressed so that the sleeve can be stripped from the clamping dome.

A disadvantage of the actuating device known from DE 28 14 338 A1 is that the ejector device has a large construction volume due to the mechanical drive needed.

US 2 949 313 A discloses a control element corresponding to the preamble of claim 1, which is rotatably supported about a central axis and can be actuated axially, the adjusting element being able to be moved by an axially displaceable fluid-driven piston between a rest position and at least one working position is adjustable.

The invention has for its object to provide an actuator.

The object is achieved by the features of claim 1.

The advantages that can be achieved with the invention are, in particular, that for the drive a pressurized piston is used in the ejector device. Since that pressure-carrying fluid, for example compressed air or hydraulic fluid, through channels geometry of any design can be guided to the displacement above the piston can, clamping domes are possible in a very compact design. You can also by a correspondingly high working pressure generates very high wiping forces become.

It is to reduce the technical effort in the construction of the mandrel advantageous if the piston is designed to act only on one side. The piston is like this to arrange that the piston is driven to strip the sleeve with the fluid can be. To return the piston to the starting position, elastic Spring elements, such as coil springs, are used.

Since the ejector one part rotatable with the mandrel and one has fixed part, which must be brought into engagement with each other the risk that in the contact area between the rotatably mounted and the fixed part of the ejector device an increased wear occurs. The Training of the ejector device should therefore be chosen so that the second Part between a rest position and at least one working position are adjusted can. In the rest position, the first part is completely separated from the second part by a gap separately while he comes to the system in the working position on the second part, so that Forces for actuating the second part can be transmitted.

To reset the second part from at least one working position in the Magnetic elements can be used particularly advantageously in the rest position. The of attraction forces emanating from a magnetic element act without contact across an air gap and can automatically in a particularly simple manner withdraw the fixed second part, for example an actuating piston.

It is very general for arrangements that have a rotatably mounted and axially operable Actuator between an axially displaceable, fluid-driven piston a rest position and at least one working position is adjustable, especially advantageous if the piston by at least one magnetic element from the working position can be returned to the rest position. This measure can wear in the contact zone between the fixed piston and the rotatably mounted one Adjusting element can be avoided in a simple manner, since the piston as long as it is used Actuation of the actuating element is not required by the magnetic element automatically and easily retracted to the rest position and held there reliably becomes.

An embodiment of the invention is shown in the drawings and is in following described in more detail.

Fig. 1

einen Spanndorn im seitlichen Querschnitt;

Fig. 2

die Einzelheit X aus Fig. 1 in einem ersten Betriebszustand;

Fig. 3

die Einzelheit X aus Fig. 1 in einem zweiten Betriebszustand.

Show it:

Fig. 1

a mandrel in the lateral cross section;

Fig. 2

the detail X from Figure 1 in a first operating state.

Fig. 3

the detail X from FIG. 1 in a second operating state.

In Fig. 1, a mandrel 01 is shown, which is shown in a broken frame 02 an otherwise not shown reel changer is attached. By using the frame 02 firmly connected housing 03 of the mandrel 01 is with the rolling bearings 04; 06 one multi-part shaft 07 rotatably mounted.

On the left side of the housing 03, the multi-part shaft 07 extends to the Outside of the housing 03 and forms a clamping cylinder 08 on which one schematically illustrated sleeve 09 can be fixed. To fix the sleeve 09 on Clamping mandrel 01 are the toggle levers on the by means of disc springs and compression springs provided jaws 11 pressed radially outwards. To operate the Clamping jaws 11 can be an adjusting element 12, e.g. B. an actuating shaft 12 in one Hollow shaft 13 can be adjusted axially, so that the clamping jaws 11 by positive Engagement of the expansion elements 14 are pressed outwards.

The sleeve 09 carries a rolled up web, e.g. B. paper web.

For stripping a used sleeve 09 from the scraper ring 10 is 01 on the mandrel an ejector device with several control elements 16, z. B. Rotary Beared Parts 16, e.g. B. ejector pin 16 is provided. The ejector pin 16 are so on the Hollow shaft 13 arranged that the one end of the scraper ring 10 on the end face the sleeve 09 can come to rest. To remove the sleeve 09 Ejector pin 16 extended synchronously with the scraper ring 10 and press the Sleeve 09 relative to the clamping cylinder 08 to the side. It should be noted that the Ejector pin 16 and the scraper ring 10 on the hollow shaft 13 are axially displaceable are stored and together with the hollow shaft 13 in the housing 03 about the central axis 17th rotate.

To actuate the ejector 16 a non-rotatable part 18, for. B. a circular piston 18 used, the pressure line 19 with pressure medium can be applied. The operation of the actuation of the ejector pin 16 through the piston 18 with reference to the drawings Fig. 2 and Fig. 3, the detail X 1 enlarged in the detail, explained.

2 shows the piston 18 in cross section and the right end of the Ejector pin 16. To function the actuation of the ejector pin 16 is too note that the piston 18 together with the housing 03, an intermediate piece 21 and the outer ring of the roller bearing 06 is fixed relative to the frame 02, whereas the Ejector pin 16 together with the hollow shaft 13 about the central axis 17 of the Mandrel 01 can rotate. This ensures that the piston 18 with simple means, which are designed in the manner of piston rings, are sealed can.

In Fig. 2 the piston 18 is shown in its rest position, in which the ejector pin 16 and the piston 18 are separated by a gap 22. In the resting position of the Piston 18 can the ejector pin 16 wear and resistance around the Rotate center axis 17. On the face of the ejector pin 16 facing away from the Pistons 18 are magnetic elements 23, e.g. B. permanent magnets 23 attached to the piston 18 pull against the metal intermediate piece 21 and ensure that the piston 18 is reliably held in the rest position. The piston 18 is with sealing rings 24; 26 sealed against the housing 03 or the intermediate piece 21, so that by Actuation of the pressure line 19 with pressure medium in the direction of Ejector pin 16 directed force can be exerted.

3, the piston 18 is shown in a working position. By adding Pressure medium through the pressure line 19, the piston 18 against the ejector pin 16th pressed so that it in turn can strip the sleeve 09 from the clamping cylinder 08. As soon as the sleeve 09 is stripped off, the pressure medium from the pressure line 19 drained so that the piston 18 no longer act compressive forces.

On the ejector pin 16 springs 27, z. B. coil springs 27, provided that bias the ejector pin 16 relative to the hollow shaft 13. By the bias of the coil springs 27 acts on the ejector pin 16 Resetting force, which after releasing the pressure medium ensures that the ejector bolts 16 can be drawn in again automatically. Together with the ejector pin 16 also the piston 18 pushed back until the ejector pin 16 on Appropriate end stops 28 come to rest. In this rearmost Working position, in which piston 18 still rests on ejector pin 16, there is a gap 29 between the piston 18 and the intermediate piece 21, which is used to reset the piston 18 must be overcome from the rearmost working position to the rest position. The permanent magnets 23 provided on the piston 18 act on the piston 18 a rightward magnetic force, the return of the piston 18 over the gap 29 caused. At the end of the actuation of the ejector pin 16, the piston 18 a rest position, as shown in Fig. 2, and is through the gap 22nd separated from the ejector pin 16.

Since the actuation of the rotatably mounted ejector pin 16 is only displaceable stored piston 18 can be used, the seal of the work area very simplified over the piston 18. Because the walls of the Piston 18 on the one hand and the housing 03 or the intermediate piece 21 on the other hand have no rotational relative movement.

The end positions of the piston 18 are queried by means of initiators 30.

The use of magnetic elements to decouple a can only be operated is for example also in the design of the actuator for the Clamping jaws 11 conceivable. It can be seen in Fig. 1 that the actuating shaft 12, the represents such rotatably mounted actuating element for actuating the Clamping jaws 11 shifted to the left by means of an axially adjustable piston 31 only can be. For this purpose, pressure medium is introduced into one of the pistons 31 via a pressure line 32 and the cylinder space formed in the housing 03. The pressure medium ensures that the piston 31 is shifted to the left and so by acting on the End plate 33 adjusts the actuating shaft 12 so that the clamping jaws 11 result can be operated.

After the pressure medium has been released from the pressure line 32, the springs 34 provide for Resetting the actuating shaft 12 so that the piston 31 passes through the end plate 33 is pushed back. The actuation shaft 12 is reset by end stops limited so that the piston 31 through the end plate 33 only up to a certain Point, namely the rearmost working position, can be pushed back. In this Position, the piston 31 is still on the end plate 33, which is because of this wear occurring in the event of a relative movement between end plate 33 and Piston 31 is undesirable. To avoid this wear are on the of the End plate 33 facing away from the face of the piston 31 magnetic elements 37, z. B. Permanent magnet 37 is provided, by the magnetic forces of the piston 31 in a Rest position can be reset, in which the piston 31 no longer on the End plate 33 comes to rest.

LIST OF REFERENCE NUMBERS

01

mandrel

02

frame

03

casing

04

roller bearing

05

-

06

roller bearing

07

Shaft, multi-part

08

clamping cylinder

09

shell

10

scraper

11

jaws

12

Control element, actuation shaft

13

hollow shaft

14

spreader

15

-

16

Control element, part, ejector pin

17

central axis

18

Part, piston

19

pressure line

20

-

21

connecting piece

22

gap

23

Magnetic element, permanent magnet

24

seal

25

-

26

seal

27

Spring, coil spring

28

end stop

29

gap

30

initiator

31

piston

32

pressure line

33

faceplate

34

feather

35

-

36

-

37

Magnetic element, permanent magnet

Claims (6)

1. Actuating member (12; 16) which is rotatably mounted about a centre axis (17) and which is axially operable, the actuating member (12; 16) being shiftable by an axially displaceable fluid-driven piston (18; 31) between a rest position and at least one working position, the piston (18; 31) not being in contact with the actuating member (12; 16) in the rest position and bearing against the actuating member (12; 16) in the working position, characterised in that the piston (18; 31) can be reset from the working position to the rest position by at least one magnetic member (23; 37).
2. Actuating member (12; 16) according to claim 1, characterised in that the actuating member (12) is in the form of at least part of an operating means (11; 12; 14; 33) by which a chucked mandrel (01) inserted in a core (09) can be fixed in place.
3. Actuating member (12; 16) according to claim 1, characterised in that the actuating member (12) is in the form of at least part of an ejector means (16; 18) by which a core (09) can be stripped off a chucked mandrel (01).
4. Actuating member (12; 16) according to claim 1, characterised in that, in the working position, the actuating member (12; 16) can be shifted by the piston (18; 31 ) along an axial travel, the actuating member (12; 16) and the piston (18; 31) resting against it being resettable along this travel by at least one/a plurality of resilient members (27; 34; 36) and in particular one or more springs (27; 34; 36).
5. Actuating member (12; 16) according to claim 1, characterised in that the magnetic member (37) is fastened to the piston (31).
6. Actuating member (12; 16) according to claim 5, characterised in that the magnetic member (37) is in the form of a permanent magnet (37).

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