WO2003095208A1

WO2003095208A1 - Device for fixing at least one flexible lifting element

Info

Publication number: WO2003095208A1
Application number: PCT/DE2003/001471
Authority: WO
Inventors: Georg Schneider; Karl Robert SCHÄFER
Original assignee: Koenig And Bauer Aktiengesellschaft
Priority date: 2002-05-08
Filing date: 2003-05-08
Publication date: 2003-11-20
Also published as: DE10220546A1; EP1526969A1; DE10220546B4; AU2003240413A1

Abstract

The invention relates to a device for fixing at least one flexible lifting element (03) comprising at least one limb (04, 05) which is folded back on a lateral surface (02) of a cylinder (01) of a rotary printing machine. Said cylinder comprises at least one channel (06) which opens up (07) on the lateral surface thereof, said opening comprising an edge (13, 14) having a wall which extends towards the channel. At least one clamping element (17, 18) for clamping the limb introduced into the opening, and an actuator (25) for actuating the clamping element, are provided in the channel. The folded limb comprises a reinforced edge which forms an abutment that grips under the wall from the inside of the channel when the limb is clamped. When the limb is unclamped, the actuator causes the abutment to be released from its grip.

Description

description

Device for fastening at least one flexible elevator

The invention relates to a device for fastening at least one flexible elevator with at least one bent leg on a lateral surface of a cylinder of a rotary printing press according to the preamble of claim 1 or 2.

DE 19924784 A1 discloses a device for tensioning and / or clamping flexible plates on a cylinder having slot fastenings, movable clamping and / or clamping elements being provided in the interior of a cylinder pit and having a bent end of a flexible plate inserted into the cylinder pit tense and / or jammed.

DE 19924787 A1 discloses a device for clamping and releasing flexible plates with folded-in hanging legs, in which two interacting strips are provided in a cross-sectional area running axially to the channel, each of which is acted upon by a spring in opposite directions, both of which act on one another Support the springs with one end each on an inner wall of a base body arranged in the channel.

From DD 262 191 A1 a device for attaching a flexible printing plate to the plate cylinder of a rotary printing press is known, in which the plate cylinder has an axially extending channel in which a hollow shaft equipped with a recess and a shaft are rotatably arranged coaxially, with the Shaft is connected to a strip which extends through the hollow shaft and clamps the angled edge of the pressure plate which rests against a side surface of the channel. A side surface of the recess of the hollow shaft can be equipped with a shoulder that engages over an additional edge formed on the angled edge of the pressure plate. From WO 89/01866 it is known that the ends to be attached to a cylinder made of a non-dimensionally stable, non-metallic material such as. B. existing paper or polyester thin stiffening film with metal strips to improve their attachment in a groove of a arranged in a channel of the cylinder tension shaft, the metal strips are folded or attached to the ends of the printing film.

It is also proposed in US Pat. No. 2,937,593 A to fold the ends of a thin printing film consisting of a soft elastic material (thickness 0.03 mm) one or more times and optionally with inserted or adhesive strips (thickness between 0.1 mm and 0.2 mm) in their thickness to make these ends attachable to a pressure cylinder with clamping elements. A variant of US 2 937593 A provides notch-shaped incisions along the edge of a stiffened end of the film in order to be able to align the film better in cooperation with pins attached to the cylinder.

In order to increase the stability of hanging legs which are folded at the ends of a printing blanket or a printing form to be attached to a cylinder, it is proposed in US Pat. No. 3,332,346 A to cover the ends with U-shaped bent metal elements before these ends can be clamped and tensioned by means of a tensioning shaft arranged in a channel of the cylinder.

The invention has for its object to provide a device for fastening at least one flexible elevator with at least one bent leg on a lateral surface of a cylinder of a rotary printing press.

The object is achieved by the features of claim 1 or 2. The advantages that can be achieved with the invention are, in particular, that the folded end of the plate-shaped elevator can be held in a form-fitting manner in a slot fastening, as a result of which the reliability of the clamping and / or tensioning of the elevator carried out in the slot fastening is improved. Even if the contact pressure or the clamping force required for the clamping decreases, for example due to an aging-related fatigue of a spring element generating the contact pressure or the clamping force or even if the clamping and / or clamping elements break, the proposed design of the elevator is due to its positive fit Bracket still increased security against its unintentional release from the cylinder, which could otherwise easily happen because the elevator was bent to adapt to the curvature of the outer surface of the cylinder against elastic resistance and is therefore under a mechanical tension, which tends to the elevator back to its just stretched starting position.

The hanging edge is stiffened, which significantly reduces the risk of damage, for example due to unintentional kinking or bending. During the handling of the elevator, this danger is given by the hectic pace that often exists at its place of use, but in the worst case the elevator can become unusable. A radius resulting from the stiffening at the hooking edge also facilitates threading the hooking edge into a slot fastening. The higher protection against unintentional bending of the hooking edge and its easier threading into the slot fastening is particularly relevant when using an automatic plate changer or an automatic feed device for the elevator to a cylinder. Due to the radius given by the flanging, the hooking edge is also no longer sharp-edged, as a result of which the risk of injury, in particular cut injury, is reduced for an operator who is handling the elevator. In addition, especially with the very limited installation space in a channel of the cylinder, it is advantageous that with only a single actuating means acting on a clamping piece, both a clamping of the leg of the elevator inserted into the opening of the cylinder is carried out and also when this clamping is released Removal of the leg hooked into the opening with its stiffening is supported.

Exemplary embodiments of the invention are shown in the drawings and are described in more detail below.

Show it:

1 shows an elevator with a partially stiffened hooking edge in the clamped operating state;

Fig. 2 shows an elevator with a partially stiffened hooking edge in the released operating state.

1 and 2 is on a lateral surface 02 of a cylinder 01 a z. B. designed as a plate-shaped printing form elevator 03 in that on two opposite ends in the circumferential direction of the cylinder 01 of the elevator 03 bent leg 04; 05 inserted into a channel 06 arranged in the cylinder 01, which has an opening 07 directed towards the lateral surface 02 of the cylinder 01, and there essentially on the walls 08; 09 the opening 07 are created. If several elevators 03 are applied in the circumferential direction of the cylinder 01, the section of the cylinder 01 shown in FIGS. 1 and 2 shows a leading end 11 of a first elevator 03 and a trailing end 12 of an elevator 03 following in the circumferential direction of the cylinder 01, whereby both ends 11 shown; 12 of the elevators in the same channel 06 of the cylinder 01 are attached. The folded leg 04; 05 of the elevators or of the elevator 03 can also partially rest on the wall 10 of the channel 06 following the area of the opening 07 and lying deeper inside the cylinder 01, because the boundary between the walls 08; 09 of the opening 07 and the wall 10 of the channel 06 runs smoothly. With this reference, it should therefore only be indicated that the insertion depth of the legs 04; 05 is not exactly defined, but encompasses a larger tolerance range. The channel 06 can have different cross-sectional geometries without influencing the invention, but a circular cross-section is favorable in terms of production technology.

Even if the invention is explained using the example of a plate-shaped printing form, the elevator can also be designed as a printing blanket applied to a thin carrier plate. At least the ends of the plate-like printing form or the support plate of the printing blanket consist of a metallic material, for example an aluminum alloy. The material thickness D of the legs 04 bent at the ends of the elevator 03 is usually; 05 a few tenths of a millimeter, e.g. B. in the range of 0.2 mm to 0.4 mm, preferably 0.3 mm.

The elevator 03 to be fastened on the lateral surface 02 of the cylinder 01 is as a rule a flat, rectangular piece of material, which is flexible in such a way that the elevator 03 is adaptable against elastic resistance to the curvature of the lateral surface 02 of the cylinder 01 this elevator 03 in its shape and structure of solid, stable nature. It is made of a hard, consistent material. At least the ends 11; 12 of the elevator 03 are designed to be dimensionally stable in such a way that they can be folded and thus provided with a permanent edge by means of a bend. The material therefore has at the ends 11; 12 a certain rigidity and rigidity, so that a permanent change in shape can be formed by bending against a material-specific resistance. However, practice has shown that in a conventionally designed elevator when handling while fixing it on the lateral surface 02 of a cylinder 01, this resistance can inadvertently be overcome all too easily.

For the sake of simplicity, the description of the invention is here made without restricting the invention to the following simplified illustration, as if only a single elevator wrapping around the cylinder had to be fastened. For the person skilled in the art can easily understand that several elevators according to the invention described here can be fastened to the cylinder both in its axial direction and in its circumferential direction, but in the case of several elevators in the circumferential direction, several channels are then also provided have to be.

Seen in the direction of production P, the elevator 03 to be fastened on the cylinder 01 has a leading end 11 and a trailing end 12, each with a bent leg 04; 05 on. Likewise, the opening 07 of the channel 06 has a front edge 13 seen in the production direction P of the cylinder 01, from which a wall 08 extends to the channel 06, this wall 08 also being referred to as a first wall 08, and a rear edge 14 , from which a wall 09 also extends to the channel 06, this wall 09 being called the second wall 09. This rear edge 14 can also be rounded or beveled by means of a chamfer for easier insertion of the folded leg 05 into the opening 07. The opening 07 is long and narrow on the lateral surface 02 of the cylinder 01 and is thus slit-shaped, the slot width S compared to the depth t of the channel 06, which, for. B. 30 mm, is small and dimensioned such that a leg 04 of a leading end 11 of an elevator 03 and a leg 05 of a trailing end 12 of the same or - with several elevators attached in the circumferential direction of the cylinder 01 - a similar elevator 03 in the opening 07 can be arranged one behind the other. Slot widths S of less than 5 mm are advantageous, preferably in the range of 1 mm to 3 mm. An advantageous ratio of the slot width

5 to the depth t of the channel 06 thus results in the range from 1:30 to 1:10.

An acute angle α is formed between the wall 08 extending from the front edge 13 to the channel 06 and an imaginary tangent T lying on the lateral surface 02 of the cylinder 01 on the opening 07, which angle is between 40 ° and 50 °, preferably 45 ° is. Thus, the opening 07 tapers towards the lateral surface 02 of the cylinder 01 and it widens towards the channel 06. The leg 04 of the leading end 11 of the elevator 03 can be hung on the front edge 13 of the opening 07, so that this leg 04 on the from the front edge 13 to the channel

06 extending wall 08 preferably fits positively. The wall 09 on the rear edge 14 of the opening 07 drops approximately perpendicular to the channel 06. However, the wall 09 can also be slightly inclined so that the opening 07 widens towards the channel 06. An angle β, which is the opening angle between the wall 09 extending from the rear edge 14 to the channel 06 and the already mentioned tangent T lying on the lateral surface 02 of the cylinder 01 on the opening 07, is for example in the range between 80 ° and 95 ° and is preferably 90 °. The leg 05 applied to this wall 09 is preferably bent at the same angle β. It is advantageous to fold the leg 05 between 80 ° to 85 °, in particular 83 °.

There is preferably a base body 15 in the channel 06, the cross-sectional geometry of which is adapted to the cross-sectional geometry of the channel 06 and is supported on the wall 10 of the channel 06. In this example, the channel 06 has a circular cross section. The base body 15 is here in the form of an open to the opening 07, in its cross section z. B. formed a three-quarter circle, in the channel 06 axially extending to the cylinder 01 cylindrical hollow body and adapted with its diameter to the channel 06. As a result of this shape, the base body 15 has two legs 28 along its longitudinal extent; 29 each with one Cutting area A; B, wherein at least the sectional area A on that leg 28 of the base body 15, which is located on the side of the channel 06 to which the trailing end 12 of the elevator 03 is fastened, falls at the same angle to the base 16 of the channel 06 as that wall 09 extending from the rear edge 14 to the channel 06, so that this cut surface A can preferably connect flush to the wall 09 extending from the rear edge 14 to the channel 06. This cut surface A on the leg 28 of the base body 15 is determined in its extent by the length and wall thickness W of the hollow body. It preferably falls perpendicular to the bottom 16 of the channel 06.

At the bottom 16 of the channel 06 15 in recesses of the base body z. B. a first clamping piece 17 and a second clamping piece 18 pivotally mounted, both clamping pieces 17; 18 are levee-shaped and are arranged opposite one another in the interior of the base body 15. The first clamp 17 has z. B. a cantilevered arm 19 which can be pressed against the cut surface A of the base body 15. The contact pressure is generated by a spring element 21 which is clamped between the base body 15 and the first clamping piece 17. A spring element 22 is also clamped between the second clamping piece 18 and the base body 15, so that this second clamping piece 18, for example with a projecting arm 20 molded thereon, presses on a clamping roller 24 mounted on a shoulder 23 of the first clamping piece 17, this clamping roller 24 in turn clamps the bent leg 04 of an elevator 03, which is applied to the wall 08 extending from the front edge 13 to the channel 06. Both spring elements 21; 22 can e.g. B. as a helical compression spring 21; 22 formed and between the base body 15 and the respective clamping piece 17; 18 can be clamped parallel to the tangent T lying on the opening 07. Generalized form the clamping pieces 17; 18 each have a holding element 17; 18, which has a bent leg 04; 05 of an elevator 03 z. B. by a positive fit on the outer surface 02 of the cylinder 01 or at his Training as a clamp 17; 18 - as described by way of example in FIGS. 1 and 2 - is clamped by a frictional connection.

A between the two opposing clamping pieces 17; 18 arranged adjusting means 25 brings a counterforce to the two spring elements 21; 22, with which the adjusting means 25 has a direction of action directed essentially in the direction of the circumference of the cylinder 01, so that the arms 19; 20 exerted clamps if necessary by simultaneously pivoting the clamping pieces 17; 18 can be solved. The actuating means 25 is preferably a hose 25 running in the longitudinal direction of the channel 06, which is connected to a pressure medium, for. B. compressed air can be applied. The actuating means 25 can also be realized by an electrically acting, a hydraulically acting or other remotely operable drive 25 acting in the interior of the channel 06, the drive 25 applying a force to the clamping piece 17 arranged in the channel 06 and the clamping piece 17 for execution a movement associated with a change of position.

1 now shows an elevator 03 designed as a flexible plate with an approximately right-angled leg 05 at the trailing end 12 of the elevator 03, which on the wall 09 extending from the rear edge 14 to the channel 06 and on the cut surface A , which forms a non-offset, flat support surface for the leg 05 inserted into the opening 07 with the aforementioned wall 09 towards the channel 06, and is clamped with the projecting arm 19 of the first clamping piece 17 on the cut surface A on the leg 28 of the base body 15 , This clamped leg 05 at the trailing end 12 of the elevator 03 is stiffened, preferably crimped, such that its edge is bent on the inside by 180 ° to the side facing away from the projecting arm 19 of the first clamping piece 17, ie with reference to the elevator 03. Through this design, this leg 05 is stiffened in two layers and has a curve on its bend, through which it is easier and for one Operator can be inserted into opening 07 without risk of cut injury. The hanging edge of the leg 05 is therefore formed in two layers and stiffened. If the end 11; 12 of the elevator 03 is to be stiffened even more, this end 11; 12 can also be bent several times, the bends being able to take place in the same direction, so that a spiral winding of the end 11; 12 results, or they take place alternately in opposite directions, so that the end 11; 12 has a meandering winding.

In Fig. 2 this stiffened leg 05 is shown again, the actuating means 25 is actuated and the clamps are thus released. After releasing the clamping on the wall 09 extending from the rear edge 14 to the channel 06, the leg 05 of the elevator 03 either jumps out of the opening 07 automatically due to its inherent tension in the manner indicated in FIG. 2, or this leg 05 by means of tools, d. H. at least removable by a device or operator from the opening 07. By means of the clamping piece 17, the actuating means 25 not only causes the clamping to be released, but also at the same time the stiffened leg 05 to be released from its hooking.

Preferably on the cantilever arm 19 of the first clamping piece 17 is, for. B. a bead 26 directed towards the opening 07, into which a preferably stiffened, in particular flanged edge of the leg 05 can dip at the trailing end 12 of the elevator 03 after this leg 05 is inserted into the opening 07. The bead 26 is accordingly a trough-shaped recess for receiving the leg 05 of the elevator 03 inserted into the opening 07. This leg 05 is then driven by a pivoting movement of the first clamping element 17, which extends from the rear edge 14 to the channel 06, by the actuating means 25 Wall 09 as well as on the cut surface A which is flush with this wall 09 on the leg 28 of the base body 15 and with a support surface F formed on the arm 19 of the first clamping piece 17 on the cut surface A of the base body 15 by the force a spring element 21 acting on the first clamping piece 17. The bead 26 is accordingly attached to or formed on the first clamping piece 17 such that it can be pivoted by the pivoting movement of the first clamping piece 17 under the leg 28 of the base body 15 or along the inner wall 27 thereof, or in other words: during the clamping of the leg 05 of the elevator 03, the leg 28 of the base body 15 closes the bead 26, as a result of which the effect of a lock or locking occurs and the leg 05 of the elevator 03 is locked due to its flanging on its edge and is thus secured against unintentional loosening. The bead 26 is somewhat wider than the stiffened edge of the leg 05, the thickness of this stiffened edge resulting at least from twice the material thickness D of the leg 05. The material thickness D of the leg 05 is, for example, in the range from 0.2 mm to 0.4 mm, in particular 0.3 mm.

The preferably flanged edge of the leg 05 of the elevator 03 is bent through 180 ° to the side facing away from the projecting arm 19 of the first clamping piece 17, but the bent end of the leg 05 extends only for a short distance in the direction of the rear edge 14 of the opening 07, so that the leg 05 is only partially formed in two layers. The leg 05 is thus to the wall 08; 09 bent, on which the leg 05, with its non-stiffened area, preferably bears positively. The leg 05 is therefore only stiffened at its edge. If the leg 05 of the end of the elevator 03 inserted into the opening 07 has the length 13, a stiffening of this leg 05 should be stiffened with a length 14 at its edge, the length 14 being at most% of the length of 13. The edge of the leg 05, ie the stiffening in this case reduces the sharpness of the leg 05 at its end and - as will be explained in the following - forms a stop directed towards the lateral surface 02, which essentially extends in the radial direction from the inside of the channel 06 reaches under the wall 09. Instead of the above-described bead 26 or in combination with it, one with the clamping piece 17th connected or coupled means of transport can be provided on the leg

05 trained stop in the interior of the channel 06 moved from a position fixed under the wall 09 to a released position in the area of the opening 07.

The absolute length of 13 is, for example, in the range from 6 mm to 15 mm, in particular between 8 mm and 12 mm, the shorter lengths being preferred, in order to thread the leg 05 as simply as possible into the opening 07 and to remove it just as easily to ensure from the same. If the length 14 is greater than% of the length of 13, either the wall 09 is too narrow in its dimension between the outer surface 02 of the cylinder 01 and the wall 10 of the channel 06, or the length 13 would have to be made excessively large, which is, however the insertion of the leg 05 into the opening 07 and the removal from it would be a hindrance. The length 13 is chosen such that z. B. can bend the leg 05 at its edge still cheap. The bending is preferably carried out in such a way that the part of the leg 05 forming the stiffening runs approximately parallel to the length 13 of the leg 05 and z. B. rests on the back of the leg 05 or is separated only by a narrow gap from the back of the leg 05. The absolute length 14 of the leg 05 is also selected such that the elevator 03 is advantageously connected to a feed device, for. B. a plate changing device can be automatically replaced on the cylinder. For this, shorter legs 05 are useful.

In this embodiment variant, not only is the advantage obtained by the rounding on the bent edge, but here the bent end of the leg 05 z. B. in the bead 26 and at the same time engages from the inside of the base body 15 under or on the inner wall 27. While the first clamping piece 17 with its cantilever arm 19 to the from the rear edge 14 to the channel

06 extending wall 09 and leg 05 of the elevator 03 resting on the sectional area A by means of the spring element 21 onto the first clamping piece 17th exerted force on the cut surface A of the base body 15 and thus clamps, the leg 05 of the elevator 03 fastened with this clamping is simultaneously secured against unintentional detachment from the opening 07 in that the stiffened edge of this leg 05 is formed with one on it Stop hooked to the base body 15.

In the event that the from the clamping pieces 17; 18 and the spring elements 21; 22 existing clamping device is arranged without a base body 15 in the channel 06 by the clamping pieces 17; 18 and spring elements 21; 22 are supported and supported directly in or on the wall 10 of the channel 06, a crimped edge of the leg 05 of the elevator 03 inserted into the bead 26 engages barb-like under the wall 09 extending from the rear edge 14 to the channel 06 as soon as the clamping piece 17 presses the leg 05 of the elevator 03 against this wall 09 with its bearing surface F. The second clamping piece 18 clamps in the manner already described, via a clamping roller 24, the leg 04 inserted into the opening 07 at the leading end 11 of the elevator 03 to the wall 08 extending from the front edge 13 to the channel 06, to which this leg 04 of the elevator 03 is preferably applied in a form-fitting manner. Because in this example the cantilever arm 19 of the first clamping piece 17 has a large volume due to the required depth of the bead 26 formed on it, in FIG. 1 the cantilever arm 19 of the first clamping piece 17 covers the cantilever arm 20 of the second clamping piece 18.

2 shows the released operating state for the leg 05 of the elevator 03 shown clamped in FIG. 1. The actuating means 25 is actuated, whereupon the first clamping piece 17 swings back so far against the force of the spring element 21 that the bead 26 is released towards the opening 07 of the channel 06 and the leg 05 of the elevator 03 z. B. with an inner wall 30 of the bead 26 or with another correspondingly designed part of the clamping element 17 driven by the actuating means 25 from the wall 09 extending from the rear edge 14 to the channel 06 as far It is pushed away that the leg 05 can be removed from the opening 07 in a simple manner, ie after the hooking has been released, or that it jumps out of the opening 07 automatically due to the inherent tension of the elevator 03. With the same drive, namely the actuating means 25, both the clamping is released and at the same time the stiffened leg 05 is conveyed out of the opening 07, the leg 05 being secured in the opening 07 by means of a hook.

In the exemplary embodiments shown in FIGS. 1 and 2, the leg 05 was stiffened by flaring the end thereof. However, the stiffening can also be achieved in that, for example, a strip of a rigid, solid material is applied to the leg 05 in a material-locking or form-locking manner. In any case, the leg, together with its stiffening, has a thickness that is less than the slot width S of the opening 07, so that the leg 05 can be easily threaded into the opening 07. Since the leg 04 formed at the leading end 11 of the elevator 03 is generally first inserted into the opening 07 and it also preferably has the material thickness D, the thickness of the stiffened leg 05 at the trailing end 12 of the elevator 03 is less than the difference the slot width S of the opening 07 and the material thickness D of the leg 04 at the trailing end 11 of the elevator 03.

LIST OF REFERENCE NUMBERS

01 cylinder

02 lateral surface (01)

03 elevator

04 legs (03)

05 leg (03)

06 channel

07 opening (06)

08 wall, first

09 wall, second

10 wall (06)

11 leading end (03)

12 trailing end (03)

13 front edge (07)

14 rear edge (07)

15 base body

16 reason (06)

17 clamping piece, first; retaining element

18 clamping piece, second; retaining element

19 cantilever arm (17)

20 projecting arm (18)

21 spring element

22 spring element

23 shoulder (17)

24 pinch roller

25 actuators, drive

26 surround

27 inner wall (15) 28 legs (15)

29 legs (15)

30 inner wall (26)

A cut surface (28)

B cut surface (29)

F contact surface

P production direction (01)

S slot width (07) w wall thickness (15)

D material thickness of the legs (04; 05)

T tangent t depth (06)

13 length (05)

14 length of stiffening

Angle ß angle

Claims

Expectations

1. Device for fastening at least one flexible elevator (03) with at least one bent leg (04; 05) on a lateral surface (02) of a cylinder (01) of a rotary printing press, with at least one channel (06) in the cylinder (01) an opening (07) is formed on the lateral surface (02), the opening (07) on the lateral surface (02) having an edge (13; 14) with a wall (08; 09) extending to the channel (06), wherein in the channel (06) at least one holding element (17; 18) is provided for holding the leg (04; 05) inserted into the opening (07), characterized in that on the bent leg (04; 05) a while holding the leg (04; 05) is formed from the inside of the channel (06) under the wall (08; 09) stop, the holding element (17; 18) or a means of transport coupled to the holding element (17; 18) removing the stop from underneath the wall (08; 09) fixed position in a released position transporti ert.

2. Device for fastening at least one flexible elevator (03) with at least one bent leg (04; 05) on a lateral surface (02) of a cylinder (01) of a rotary printing press, with at least one channel (06) in the cylinder (01) an opening (07) is formed on the lateral surface (02), the opening (07) on the lateral surface (02) having an edge (13; 14) with a wall (08; 09) extending to the channel (06), at least one holding element (17; 18) is provided in the channel (06) for holding the leg (04; 05) inserted into the opening (07), at least one drive (25) for moving the holding element (06) in the channel (06) 17; 18) is provided, characterized in that a stop which engages under the wall (08; 09) from inside the channel (06) when the leg (04; 05) is held is formed on the bent leg (04; 05).

3. Device according to claim 2, characterized in that the drive (25) drives the movement of the stop from a position fixed under the wall (08; 09) into a released position.

4. The device according to claim 1 or 2, characterized in that the leg (04; 05) after its introduction into the opening (07) while it is held in a form-fitting manner against the wall (08; 09).

5. The device according to claim 1 or 2, characterized in that the holding element (17; 18) pushes the leg (04; 05) away from the wall (08; 09) when releasing its holding, so that the leg (04; 05) can be removed from the opening (07) or automatically jumps out of the opening (07) due to the internal stress of the elevator (03).

6. The device according to claim 1 or 2, characterized in that the holding element (17; 18) is pivotally mounted and is in the form of a lever.

7. The device according to claim 1 or 2, characterized in that the holding element (17; 18) has a support surface (F) with which the holding element (17; 18) holds the leg (04; 05).

8. The device according to claim 1 or 2, characterized in that the holding element (17; 18) has a bead (26) into which the leg (04; 05) inserted into the opening (07) is immersed.

9. The device according to claim 1 or 2, characterized in that the bent leg (04; 05) has a stiffened edge.

10. The device according to claim 9, characterized in that the stiffened edge is formed by bending the leg (04; 05) by 180 ° to the side facing away from the holding element (17; 18).

11. The device according to claim 9, characterized in that the stiffened edge is formed from a rigid or rigid material applied to the leg (04; 05) in a material-locking or positive-locking manner.

12. The apparatus according to claim 9, characterized in that the stiffened edge is formed at least in two layers.

13. The apparatus according to claim 9, characterized in that the bent leg (04; 05) has a length (13) and the stiffening of the edge has a length (14), the length (14) of the stiffening at most a quarter of the length ( 13) of the leg (04; 05).

14. The apparatus according to claim 12, characterized in that the length (13) of the bent leg (04; 05) is between 8 mm and 12 mm.

15. The apparatus according to claim 1 or 2, characterized in that a material thickness (D) of the leg (04; 05) is between 0.2 mm and 0.4 mm.

16. The apparatus according to claim 1 or 2, characterized in that in the channel (06) at least one base body (15) is provided, the base body (15) as an axially extending to the channel (06) and on a wall (10 ) of the channel (06) supporting hollow body is formed, which is open to the opening (07) of the channel (06) and at its opening has two legs (28; 29) each with a cut surface (A; B).

17. The apparatus according to claim 16, characterized in that the cut surface (A) on the leg (28) which is located on that side of the channel (06) on which the holding of the leg (04; 05) of the elevator ( 03), is flush with the wall (08; 09) extending from the edge (13; 14).

18. The apparatus according to claim 16, characterized in that the holding of the leg (04; 05) on the cut surface (A) of the leg (28) of the base body (15) takes place.

19. The apparatus according to claim 16, characterized in that the stop formed on the leg (04; 05) engages while holding the leg (04; 05) from the inside of the base body (15) under an inner wall (27) of the base body (15) or hooks on this inner wall (27) of the base body (15).

20. The device according to claim 8 or 16, characterized in that the wall (08; 09) or the leg (28) of the base body (15) while holding the leg (04; 05) of the elevator (03) the bead (26 ) closes.

21. The apparatus according to claim 1 or 2, characterized in that the channel (06) has a circular cross section.

22. The apparatus according to claim 16, characterized in that the base body (15) of the cross-sectional geometry of the channel (06) is adapted.

23. The device according to claim 16, characterized in that the base body (15) spans a three-quarter circle.

24. The device according to claim 16, characterized in that the holding element (17; 18) is arranged inside a base body (15).

25. The device according to claim 16, characterized in that the holding element (17; 18) in the base body (15) at the bottom of the channel (06) is mounted.

26. The device according to claim 16, characterized in that a spring element (21) clamped between the base body (15) and the holding element (17; 18) generates a contact pressure exerted by the bearing surface (F) on the leg (04; 05).

27. The device according to claim 26, characterized in that the drive (25) when activated activates a counterforce to the pressure exerted by the spring element (21) and thereby releases the holding.

28. The device according to claim 1 or 2, characterized in that the wall (08; 09) extending from the edge (13; 14) of the opening (07) to the channel (06) of a tangent lying on the opening (07) (T) extends at an angle (ß) between 80 ° and 95 ° to the channel (06).

29. The device according to claim 1 or 2, characterized in that the fold of the leg (04; 05) is between 80 ° and 95 °.

30. The device according to claim 1 or 2, characterized in that the opening (07) to the channel (06) widens.

31. The device according to claim 1 or 2, characterized in that the opening (07) has a slot width (S) of less than 5 mm.

32. Device according to claim 3, characterized in that the drive (25) is remotely operable.

33. Device according to claim 32, characterized in that the drive (25) is designed as a pneumatically, hydraulically or electrically acting drive (25).

34. Device according to claim 1 or 2, characterized in that the holding element (17; 18) holds the leg (04; 05) inserted into the opening (07) by a positive fit.

35. Apparatus according to claim 1 or 2, characterized in that the holding element (17; 18) is designed as a clamping piece (17; 18), the clamping piece (17; 18) being the leg (04) inserted into the opening (07) ; 05) jammed by a frictional connection.