EP1337401B1 - Rotary printing machine cylinder with a device for securing a packing - Google Patents

Abstract

The fixing device has a channel (03) running axially. In each section of this channel perpendicular to the axial direction of the cylinder, there is a single fixing device (16) with only one lever (17). The acute angle (alpha ) between the channel wall (09) facing the front end (06) and the jacket surface (02). and the acute angle of the chamfering of the front end, are both between 30 and 60[deg].

Description

The invention relates to a cylinder of a rotary printing press according to the preamble of claim 1.

By the EP 07 13 770 B1 a clamping device for printing forms on a cylinder is known, wherein a hook-shaped end of a printing form hooked into a hook-shaped end of a leaf spring, and is tensioned by means of this tangential to the lateral surface in the region of the channel. A release takes place by means of a pressurizable medium pressure hose.

Also the EP 06 06 604 B1 discloses a tensioning device for a pressure plate with a bent end, which is hooked into a prestressed by a torsion bar spring hook-shaped clamping bar, and stretched by means of this tangetial to the lateral surface in the region of the channel. Here, too, a release by means of a pressurizable medium pressure hose.

The DE 43 35 140 C1 shows a clamping device for a printing plate, wherein two, each one leading and trailing end holding leaf springs are mounted on a rotatable spindle.

By the post-published DE 199 24 785 A1 a clamping device is known, wherein a trailing and a leading end is clamped by means of a double-armed lever mounted in the interior of a channel.

The DD 261 764 A1 discloses a clamping and tensioning device wherein a shaft is disposed in a hollow shaft for independently clamping a leading end and clamping / tensioning a trailing end of an elevator. At Shaft and hollow shaft each have at least one bar attached, which cooperate with the ends of the elevator.

The US 5,069,127 shows independently operable jigs for juxtaposed elevators. This is done by coaxially extending waves, which are arranged in the cylinder interior and to operate from the outside.

By the EP 0 755 785 A1 discloses an actuatable by pressure means actuator, which is arranged outside of a clamping channel and drives a shaft carrying a lever.

The latter devices for clamping require increased manufacturing costs and when installed a space that ensures the inclusion of the two-armed lever or the waves and strips.

The invention has for its object to provide a cylinder of a rotary printing machine with a structurally simple and easy to automate device for receiving at least one elevator.

The object is achieved according to the invention by the features of claim 1.

The achievable with the present invention consist in particular that on the outer surface of a cylinder, for. As a forming or transfer cylinder of a rotary printing machine, a secure, automatable attachment of a lift, z. As a printing plate or a blanket, can be carried out, at the same time a width of a gap in the lateral surface of the cylinder for receiving the ends of the elevator can be kept very small.

The gap can be kept very small because there is no tangential clamping of one of the plate ends. Such tangential clamping requires space for one Spring or tension travel.

Particularly advantageous in this context is that the elevator also rests in the region of its fold on the lateral surface of the cylinder. A positive, tangential clamping requires z. T. a not lined by the lateral surface area of the elevator, which when rolling on another cylinder, in particular on a cylinder without a channel, z. B. when using so-called sleaves, a high risk of breakage.

Advantageous with respect to a structurally simple and easy to automate device is the positive hooking of the leading end in a formed by the channel geometry and the lateral surface acute-angled nose; Radial and tangential forces on the elevator are thus absorbed without a clamping device for the leading end when the trailing end is fixed with respect to a tangential movement.

The latter is given in an advantageous embodiment by the positive engagement of the trailing, almost rectangular folded end with the cylinder in the tangential direction. An arranged in the channel fastener must thus compensate for any tangential forces, but only counteract by the centrifugal force, and possibly deformation-related restoring force of the elevator, resulting radial forces. On such a frictional connection thus less force must be applied.

Also with regard to better automation, the formation of the elevator is advantageous with a trailing end bent almost at right angles, or at least between 60 ° and 100 °, in particular between 85 ° and 95 °. After hanging the leading end, a winding of the elevator in the direction of rotation, possibly using pressure rollers, take place, wherein the trailing end is pressed in a simple manner in the channel.

The design of the fastening device, wherein only an actuator must be activated for the change of the elevator, is advantageous in terms of safety and resource consumption. Clamping takes place by means of spring force, even in the event of a fault, without actuating a device or a means.

An opening of the device for fastening takes place in an advantageous embodiment by means of a reversibly deformable, can be acted upon with pressure medium hollow body.

In particular, the arrangement of a one-armed lever saves installation space a two-armed lever with the same achievable moment. In an advantageous embodiment, a spring on the one-armed lever engages almost perpendicularly to be clamped bent trailing end. In the arrangement of compression springs, the arrangement of lever and spring is advantageous in terms of the efficiency of the springs in such a way that the average force application point of the spring lies on the lever at least halfway the lever from the pivot axis to the nip. This allows a small space requirement with sufficient leverage at the same time.

In one embodiment, lever, spring, actuator, and possibly necessary supplies for the pressure medium are arranged almost completely within a tubular body, which allows a simple and cost-effective production of the cylinder and the channel designed as a bore.

Very advantageous in terms of interchangeability and maintenance is the arrangement of several, independent, individually removable body in the axial direction next to each other. A complete expansion of the cylinder can be avoided.

With regard to assembly and production costs is an embodiment of particular advantage in which in the channel only a z. B. designed as a sheet metal strip lever, which has springs on one side, and a pressurizable medium is used hose.

Fig. 1

zeigt einen Schnitt durch eine Vorrichtung zur Befestigung quer zur Zylinderachse in einer ersten Ausführungsform;

Fig. 2

zeigt einen Schnitt durch eine Vorrichtung zur Befestigung quer zur Zylinderachse in einer zweiten Ausführungsform;

Fig. 3

zeigt einen Schnitt durch eine vorteilhafte Ausführung eines Hebels;

Fig. 4

zeigt eine perspektivische Ansicht des Hebels nach Fig. 3.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Fig. 1

shows a section through a device for fixing transversely to the cylinder axis in a first embodiment;

Fig. 2

shows a section through a device for mounting transversely to the cylinder axis in a second embodiment;

Fig. 3

shows a section through an advantageous embodiment of a lever;

Fig. 4

shows a perspective view of the lever Fig. 3 ,

A cylinder 01 a rotary printing machine, z. As a forme cylinder 01 or a transfer cylinder 01 has on its lateral surface 02 at least one pointing into the interior of the cylinder 01 and extending in the axial direction of the cylinder 01 channel 03 for the attachment of at least one elevator 04, z. B. a printing plate 04 or a blanket 04, on. In the channel 03 reach two bent ends 06; 07, z. As a reference to a direction D leading end 06 and a trailing end 07 of the elevator 04, or a leading end 06 and a trailing end 07 of two circumferentially adjacent elevators 04, into it.

The channel 03 has in the region of the lateral surface 02 an opening 08, z. B. a gap 08, with a small width b08 in the circumferential direction, z. B. smaller than 5 mm, in particular smaller than 3 mm.

A first, the leading end 06 associated channel wall 09 runs at an acute angle, in particular with an angle α between 30 ° and 60 °, to the lateral surface 02 out and forms with the lateral surface 02 a nose 11. A second channel wall 12 extends approximately radially from the lateral surface 02 into the interior of the cylinder 01 and forms with the lateral surface 02 in approximately a right angle β, z. B. between 85 ° and 95 °.

Towards the interior of the cylinder 01, the channel 03, e.g. to a circular cross-section, which is advantageously designed as an axially extending bore. However, the channel 03 can also expand in another way, for example with a rectangular cross-section.

In the channel 03, in particular in the region of the bore, a base body 13 is arranged, which in the example corresponding to the bore has a circular cross-section. The base body 13, spielsweise a pipe 13, has at its periphery at least one axially extending recess 14, which faces the opening 08 of the channel 03. It can be arranged in a base body 13 and a plurality of axially adjacent recesses 14.

In an advantageous embodiment, a length of the base body 13 is smaller than 100 mm, in particular between 50 and 80 mm, so that a plurality of arranged in the channel 03 side by side base 13 correspond to a width of the elevator 04. Are several, z. B. two, four or even six elevators 04 arranged in the axial direction next to each other on the cylinder 01, the channel 03 at least the corresponding number of juxtaposed, individually removable bodies 13 on. Each width of the elevator 04 may again be arranged a plurality of such body 13. The base body 13 has a fastening device 16 in the interior.

In the exemplary embodiment, the fastening device 16 has a one-armed, substantially rigid lever 17, which is mounted pivotably about a pivot axis S in the region of a wall 08 of the channel 13 opposite the opening 08 of the channel 03. The only imaginary in the example pivot axis S is stationary with respect to the cylinder 01 during pivoting. The bearing of the lever 17 takes place, for example, by means of an axially extending rib 19 or a plurality of bolts 19 arranged side by side in the axial direction on the end of the lever 17 pointing into the interior of the cylinder 01. This rib 19 or the bolts 19 are supported in the corresponding number of recesses 21 in FIG the wall 18, so that a free end 22 of the lever 17 with respect. The circumferential direction of the cylinder 01 is pivotable.

The lever 17 has a length, so that in a first position A, z. B. a clamping position A, a clamping surface 23 of the free end 22 of the lever 17 at least with the recess 14 in the body 03 can act as an abutment together. In another advantageous embodiment, the length of the lever 17 is selected so that the Clamping surface 23 cooperates with the channel wall 12 as an abutment.

Between the lever 17 and the leading end 06 associated wall of the base body 13 is a further part of the fastening means 16, a spring 24, in particular a compression spring 24, respectively. An effective direction F (in this case, equivalent to a central axis F of the compression spring 24) of the spring 24 has advantageously approximately perpendicular (± 15 °) to the channel wall 07, wherein it is arranged in the base body 13 so that the effective direction F and a Connecting line V between the pivot axis S and the clamping surface 23 on at least half of this connecting path V away from the pivot axis S away. The connecting line opens at the middle level of the clamping surface 23. The connecting distance corresponds to an effective lever length of the lever 17. Thus, a high clamping force with extremely space-saving design is possible:

In the main body 13 is an actuatable with pressure medium actuator 13, such. B. a reversibly deformable, with pressure medium, such as compressed air, acted upon hollow body 26, for example, a hose 26, respectively. This hose 26 is supported either on the arranged in the direction of rotation D wall 18 of the body 13 or on an abutment 27, for. B. a in the body 13 axially and chordally extending wall 27 from. On its side facing away from the wall 27, the hose 26 cooperates with a surface 28 of the lever 17 facing away from the spring 24. In another embodiment, it is also possible for a piston which can be actuated with pressure medium to be arranged instead of the hose 26.

The possible stroke of the hose 26 in the direction of the surface 28 of the lever 17 is advantageously dimensioned so that when pressurized with compressed air hose 26, the lever 17 in a second position B, z. As a backup position B, is located, in which the free end 22 of the lever 17 is employed against the leading end 06 and this secures.

In a preferred embodiment, the lever 17 is formed fork-shaped in the area remote from the pivot axis S, wherein between the free, the clamping surface 23 having end 22 and cooperating with the hose 26, the surface 28 having end 29, the trailing end 07 of the elevator 04 is insertable.

Furthermore, for the purpose of securing the base body 13 against rotation in the channel 03 of a screw, not shown, or a bolt in the channel 03 may be arranged, which engages in a corresponding, not shown, axially extending groove in the wall 18 of the body 13. However, instead of the bolt, a spring, for. B. a leaf spring may be arranged, which acts as anti-rotation and at the same time the base body 13 against any possibly existing game between body 13 and channel 03 secures.

In a cavity 33 between the chord-like wall 27 and the wall 18 of the base body 13, one or more feeds 34, z. B. lines 34 or channels 34 may be provided for the pressure medium.

In particular, for cylinders 01 with two, four or even six elevators 04 arranged in the axial direction next to each other, the corresponding number of independent feeders 34 and hollow bodies 24 are provided in an advantageous embodiment. In the case of so-called double or even triple-width cylinders 01, ie a width which corresponds to at least four or even six printing plates 04 arranged side by side, it is possible (eg for two or three blankets 04 side by side on a double-wide or three-wide transfer cylinder 01) one or two or three feeders 34 and associated hollow body 24 or else four or six feeders 34 (eg for four or six printing plates 04 next to each other on a double or triple wide forme cylinder 01) may be arranged side by side. By this measure, a single or paired changes of elevators 04 on the respective single, double, or triple wide cylinder 01 is possible.

In the circumferential direction of the cylinder 01, a plurality of channels 03 may each be arranged with a plurality of base bodies 13 and associated fastening devices 16. In this case, for example, a leading end 06 of a first elevator 04 and a trailing end 07 of a circumferentially adjacent elevator 04 are held in the same channel 03.

The device for attachment is suitable both for the attachment of printing plates 04 on cylinders 01 and 04 Gummitüchem on Übertragungszylindem 01. In the latter case, the blanket 04 but rigid, corresponding folded ends 06; 07 have. Advantageously, a rubber blanket 04, not shown, but comparable with the elevator 04 in FIG. 1, carrier plate and an elastic layer disposed thereon, wherein the carrier plate in an advantageous embodiment in the region of the bent ends 06; 07 has no elastic layer. This allows a smaller width b08 of the gap 08. If a larger gap 08 is taken into account, however, the elastic layer may also extend into the channel 03 or into the opening 08.

In a second embodiment ( Fig. 2 ) is the channel 04 in the region of the inside of the cylinder 01 lying part not as a round hole, but rectangular. Particularly advantageous is in inner widening of the channel 03 by means of wire EDM, z. B. coming from the lateral surface 02 produced. Here, the production of the cylinder and the channel is particularly cost-effective, if from a solid wall area, either from a cylinder designed as a solid cylinder 01 or a full-walled cylinder outer body near the outer surface 02 of the cylinder previously produced with a circular outer profile 01, the excess material to form the Channel 03 is removed.

In a region close to the cylinder center, a wall 36 of the channel 03 has a groove 37 into which a spring 38 or a plurality of pins 38 at the lower end of the lever 17, z. B. an axially extending metal strip 17, are guided. Groove 37 and pin or

Spring 38 are dimensioned in terms of size and shape so that the lever 17 is pivotally mounted in the groove 37 by means of its pin or spring 38.

On the trailing end 07 facing side of the lever 17, the hollow body 26 is supported on the one hand on an abutment 27, in the form of an inserted into the channel 03 bevelled sheet, and on the other hand on the lever 17. In between the trailing end 07 near wall 36 and the abutment 27 resulting cavity 33, the feeds 34 of the pressure medium for or the hollow body 26 are arranged, which are connected to this or this, for example via one or more passages 41. However, the hollow body 26 can also be supported directly on the wall 36, when the supply (s) is designed as a bore (s) not shown in the cylinder body or are. On the opposite side, the lever 17 has one or more pins 39, on which the compression spring 24 can be fastened. This compression spring 24 cooperates with a near the leading end 06 near wall 36 of the channel 03. The lever 17 has, in an advantageous embodiment, a shoulder 42 which cooperates with the wall 36 of the channel 03 against falling out of the lever 17. The lever 17 with his paragraph 42 and the / the pin 39 may be made in one piece.

The cooperating with the hollow body 26 and with the compression spring 24 region of the wall 36 of the channel 03 is in each case with respect to the cross section perpendicular to the axis of rotation of the cylinder (01) straight and are in the channel 03 z. B. approximately parallel to.

In an inexpensive and at the same time stable embodiment ( Fig. 3 ), the lever 17 is made of a metal sheet 43, in particular as a perforated plate 43, to which on the side facing the hollow body 26 a plate 44, for. B. a plastic plate 44, is arranged, which the shoulder 42, z. B. in the form of a fold having. The plastic plate 44 has on the perforated plate 43 facing side z. B. webs which pass through the holes of the perforated plate 43, and on the other side in the upper Area the pins 39 can accommodate. In the lower area, they may have been thermally flattened for fixing 46 of Kuststoffplatte 44 after installation. However, the plastic plate 44 may also be cast in a particularly cost-effective and robust design to the perforated plate 43 in the aforementioned embodiment with pin 39, paragraph 39 and fixation 46. The perforated plate 43 has z. B. at its with the trailing end 07 cooperating end 22 recesses 47 ( Fig. 4 ), so that the end 07 only partially together with the trailing end 07 cooperates. In particular, a length 143 of the perforated plate 43 and a length 147 of the recess 47 are selected so that the lever 17 per perforated plate 43 cooperates with the trailing end 07 only in the region of two ends 22 to prevent tilting or twisting (eg 35 mm <I43 <50 mm and 12 mm <I47 <22). In this embodiment z. B. to avoid jamming and easier removability several such lever 17 in the channel 03 each width of the elevator 04 arranged side by side. In the cooperating with the trailing end 07 region of the end 22 of the perforated plate 43 is provided in an advantageous embodiment to increase the strength and / or the frictional resistance with a coating 48. In order for two levers 17 arranged next to one another in the channel 03 not to get caught, a shoulder 49 can be arranged on the lower end of the plate 43 in the axial direction of the cylinder 01 on one or both sides.
According to the first embodiment, also for the embodiments of the second embodiment for double (up to four printing plates 04 side by side) or three times (up to six printing plates 04 side by side) wide cylinder 01 advantageous, og arrangement of a plurality of hollow body 24 with associated feeds 34 in terms on a comfortable change of elevators 04 advantageous. The length of a lever 17 in this case corresponds at most to the width of an elevator 04, if only one lever 17 per elevator is provided. For several levers 17 each width of the elevator 14 applies accordingly. The fastening means 16 having the lever 17 and the compression springs 24 can be arranged in alignment with one another, for example, for all four elevators 04, but also in a plurality of circumferentially offset, so-called staggered channels 03.

Advantageous in the execution after Fig. 2 and especially after 3 and 4 is the most simple and inexpensive construction and handling. To equip the channel 04 with a fastening device 16, only the abutment 27, which z. B. already has the feed (s) 34, the hollow body 24 and the already equipped with the / the compression springs 24 lever 17 are inserted laterally. If the cylinder body has not shown openings for the supply of the pressure medium, the insertion of a corresponding abutment 27 with feeders 34 can be omitted.

In a further, not shown, embodiment of the device, the spring 24 is designed as a leaf spring 24. Likewise, it is possible for special embodiments, the one-armed lever 17 resilient, for example, to store on a torsion bar spring, also not shown. An additional spring 24 can be omitted in this case.

• Soll ein Aufzug 04 auf dem Zylinder 01 befestigt werden, so bleibt der Schlauch 26 zunächst entspannt und der Hebel 17 durch die Kraft der Feder 24 in der Klemmlage A. Das vorlaufende Ende 06 wird in die Nase 11 eingehängt. Durch Beaufschlagen des Schlauches 26 mit Druckluft wird der Hebel 17 gegen das vorlaufende Ende 06 angestellt und sichert in der Sicherungslage B dieses gegen ein Verrutschen. Der Aufzug 04 wird nun durch Drehen des Zylinders 01 in Drehrichtung D auf die Mantelfläche 02 aufgezogen, bis das nachlaufende, abgekantete Ende 07 in die Öffnung 08 des Kanals 03 gedrückt wird. Der Schlauch 26 wird nun entspannt, der Hebel 17 wird mittels der Feder 24 in die Klemmlage A gebracht, welcher, je nach Ausführungsform, das nachlaufende Ende 07 zwischen seiner Klemmfläche 23 und der Kanalwand 12 oder der Wand 18 des Grundkörpers 13 reibschlüssig hält. Die Demontage eines Aufzuges 04 erfolgt in umgekehrter Reihenfolge und Drehrichtung. Sind in Umfangsrichtung des Zylinders 01 mehrere Aufzüge 04 hintereinander angeordnet, so entfällt das Sichern des vorlaufenden Endes 06 in der Sicherungslage B des Hebels 17 für den zweiten Aufzug 04 bzw. weitere Aufzüge 04.
• Ein Austausch bzw. eine Wartung der Vorrichtung zum Befestigen kann in einfacher Weise durch Herausschieben der einzelnen, voneinander unabhängigen Grundkörper 13 in axialer Richtung aus dem Kanal 03 erfolgen, ohne dass ein Ausbau des gesamten Zylinders 01 erforderlich ist. Im Ausführungsbeispiel nach Fig. 2 oder Fig. 3 und 4 ist eine Demontage/Montage durch ein einfaches Einführen / Herausschieben des mit Feder 24 und Absatz 42 versehenen Hebels 17 von der Stirnseite des Zylinders her möglich.

An installation (assembly or disassembly of a lift 04) takes place by means of the fastening device as follows:

• If an elevator 04 is to be fastened to the cylinder 01, then the hose 26 initially remains relaxed and the lever 17 by the force of the spring 24 in the clamping position A. The leading end 06 is hooked into the nose 11. By applying the hose 26 with compressed air, the lever 17 is turned against the leading end 06 and secures in the backup position B this against slipping. The elevator 04 is now raised by rotating the cylinder 01 in the direction of rotation D on the lateral surface 02 until the trailing, beveled end 07 is pressed into the opening 08 of the channel 03. The tube 26 is now relaxed, the lever 17 is brought by means of the spring 24 in the clamping position A, which holds, depending on the embodiment, the trailing end 07 between its clamping surface 23 and the channel wall 12 or the wall 18 of the body 13 frictionally. The dismantling of a lift 04 takes place in the reverse order and direction of rotation. Are several elevators 04 arranged one behind the other in the circumferential direction of the cylinder 01, so eliminating the securing of the leading End 06 in the backup position B of the lever 17 for the second elevator 04 or other elevators 04.
• An exchange or maintenance of the device for fastening can be done in a simple manner by pushing out the individual, independent body 13 in the axial direction of the channel 03, without an expansion of the entire cylinder 01 is required. In the embodiment according to Fig. 2 or 3 and 4 is a disassembly / assembly by simply inserting / pushing out of the spring 24 and paragraph 42 provided lever 17 from the front side of the cylinder forth possible.

LIST OF REFERENCE NUMBERS

01

Cylinder, forme cylinder, transfer cylinder

02

Lateral surface (01)

03

channel

04

Elevator, printing form, blanket

05

-

06

End, leading (04)

07

End, trailing (04)

08

Opening, gap

09

channel wall

10

-

11

nose

12

channel wall

13

Basic body, tube

14

recess

15

-

16

Fastening device (17, 24)

17

Lever, one-armed, sheet metal strip

18

Wall (13)

19

Rib, bolt

20

-

21

Recess (13)

22

End (17)

23

clamping surface

24

Spring, compression spring, leaf spring

25

-

26

Hollow body, hose

27

Abutment, wall

28

Area (17)

29

End (17)

30

-

31

-

32

-

33

cavity

34

Feeder, pipe, duct

35

-

36

Wall (04)

37

groove

38

Spring, pin (17)

39

spigot

40

-

41

Implementation (26, 27)

42

Paragraph (17)

43

Sheet metal, perforated plate (17)

44

Plate, plastic plate (17)

45

-

46

Fixation (17)

47

Recess (43)

48

Coating (22)

49

Paragraph (17)

b08

Width (08)

I43

Length (43)

I147

Length (47)

A

Position, first, clamping position

B

Location, second, backup location

D

direction of rotation

F

Direction of action, central axis

S

swivel axis

V

Link, effective lever length

α

Angle (09)

β

Angle (12)

Claims (19)

1. Cylinder of a rotary printing press comprising at least one axial channel (03) having an opening (08) towards a lateral surface (02) of the cylinder (01), in which at least one leading end (06) and at least one trailing end (07) of at least one flexible packing (04) can be secured on the cylinder (01), the leading end (06) of the packing (04) being bent over at an acute angle and can be hooked in an interlocking manner onto a lug (11) formed by a first channel wall (09), running at an acute angle to the lateral surface (02), and the lateral surface (02), and a securing device (16) being arranged in the channel (03), which securing device has a pivotable, rigid one-arm lever (17) and at least one spring (24) by means of which the lever (17), in a clamping position (A), can be placed against the trailing end (07) of the same packing (04) or of a packing (04) adjacent in the circumferential direction, characterized in that the channel (03) has, in a section perpendicular to its longitudinal dimension, a single securing device (16) having only one lever (17) which is pivotably mounted in a region of a wall (36) of the channel (03) widening in the interior of the cylinder (01), which region is close to the centre of the cylinder, or in the region of a wall (18) of a base body (13) virtually completely receiving the securing device (16), which wall (18) is opposite the opening (08) of the channel (03).
2. Cylinder according to Claim 1, characterized in that the lever (17) is pivotable about an at least fictitious pivot axis (S) which is stationary during the pivoting relative to the cylinder (01).
3. Cylinder according to Claim 1, characterized in that the acute angle (α) between the first channel wall (09) coordinated with the leading end (06) and the lateral surface (02) and an acute angle of the bent-over part of the leading end is in each case between 30° and 60°.
4. Cylinder according to Claim 1, characterized in that the spring (24) is in the form of a pressure spring (24).
5. Cylinder according to Claim 4, characterized in that the point of intersection of a central axis (F) of the pressure spring (24) with a connecting line (V) between the pivot axis (S) of the one-arm lever (17) and the centre of a clamping surface (23) of the one-arm lever (17) is distance away from the pivot axis (S) which corresponds to at least half the length of this connecting line (V).
6. Cylinder according to Claim 1, characterized in that the angle (β) made by the lateral surface (02) and the channel wall (12) coordinated with the trailing end (07) is between 85° and 95°.
7. Cylinder according to Claim 1, characterized in that the trailing end (07) is bent over approximately at right angles.
8. Cylinder according to Claim 1, characterized in that the securing device (16) can be thrown off the trailing end (07) by means of a reversibly deformable hollow body (26) which can be subjected to a pressure medium.
9. Cylinder according to Claim 1, characterized in that the channel (03) has, in the region of the lateral surface (02), a gap (08) with a width (b08) in the circumferential direction which is less than 5 mm.
10. Cylinder according to Claim 1, characterized in that the channel (03) has, in the region of the lateral surface (02), a gap (08) with a width (b08) in the circumferential direction which is less than or equal to 3 mm.
11. Cylinder according to Claim 8, characterized in that the securing device (16) is held virtually completely, and the reversibly deformable hollow body (26) which can be subjected to a pressure medium is held completely in the radial direction, in a tubular base body (13) which has at least one cut-out (14) on its side facing the ends (06; 07).
12. Cylinder according to Claim 1, characterized in that the base body (13) has a plurality of securing devices (16) arranged side by side in the axial direction and one or more reversibly deformable hollow bodies (26) which can be subjected to a pressure medium.
13. Cylinder according to Claim 1, characterized in that the channel (03) has a plurality of base bodies (13) which are arranged side by side in the axial direction and have in each case at least one securing element (16).
14. Cylinder according to Claim 12, characterized in that at least one feed (34) for supplying the reversibly deformable hollow body (26) which can be subjected to a pressure medium is arranged in the channel (03).
15. Cylinder according to Claim 14, characterized in that the feed (34) is arranged within the tubular base body (13).
16. Cylinder according to Claim 1, characterized in that a clamping surface (23) of the securing element (16) having the channel wall (12) as an abutment cooperates by frictional contact with the trailing end (07).
17. Cylinder according to Claim 1, characterized in that a clamping surface (23) of the securing element (16) having a part of the tubular base body (13) as an abutment cooperates by frictional contact with the trailing end (07).
18. Cylinder according to Claim 4, characterized in that the pressure spring (24) is arranged with its effective direction (F) deviating at most by ± 15° from the perpendicular to the channel wall (12) which is coordinated with the trailing end (07).
19. Cylinder according to Claim 1, characterized in that, during an equipping mode, the securing device (16) has a securing position (B) in which the trailing end (07) is released and the leading end (06), to prevent release, is held by frictional contact by means of the securing device (16) on the channel wall (09) coordinated with the leading end (06).

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