EP1261465A1

EP1261465A1 - Exterior mold

Info

Publication number: EP1261465A1
Application number: EP01925374A
Authority: EP
Inventors: Meinrad Hirlinger
Original assignee: Baumgartner GmbH
Current assignee: BFS Betonfertigteilesysteme GmbH
Priority date: 2000-03-06
Filing date: 2001-03-05
Publication date: 2002-12-04
Anticipated expiration: 2021-03-05
Also published as: PT1261465E; WO2001066326A1; US20030164438A1; TR200402438T4; ATE273114T1; DE50103221D1; DE10010917A1; ES2225521T3; US6997429B2; AU2001252157A1; EP1261465B1

Abstract

A securing device comprising at least one latch ( 22 ) and at least one latch mating-element ( 26 ) are used on two mutually displaceable mold-casing segments ( 14, 16 ) to close or open a mold casing ( 10 ) used in manufacturing molded bodies, in particular concrete pipes, said device securing the mold casing ( 10 ) in a position of manufacture. The latch ( 22 ) is displaceable by means of a drive unit ( 24 ) between a locked position wherein it locks up with a latch mating-element ( 26 ) and an unlocked position wherein no locking takes place between the latch ( 22 ) and the latch mating-element ( 26 ). In the invention, the drive unit ( 24 ) can be adjusted due to relative motions between the mold casing on one hand and its manufacturing environment on the other as determined by the manufacturing procedures between a ready-to-unlock position corresponding to the locked position of the latch ( 22 ) and a ready-to-lock position corresponding to the locked position.

Description

Barrel

description

The invention relates to a molded jacket for the production of moldings, in particular for the production of concrete pipes, which can be brought into a closed production position for the preparation of the production of the moldings and is evident from this production position for demoulding the manufactured moldings, with two for closing or When the shaped jacket is opened relative to one another, a securing device is provided by means of which the shaped jacket can be secured in the production position, the securing device further comprising at least one locking element which is attached to one of the shaped jacket sections, and at least one counter-locking element which is attached to the respective another shaped jacket section is attached, and wherein the at least one locking element by means of an actuating element between a locking position corresponding to the production position of the shaped jacket, in which it is with an associated counter belt Gel element is in locking engagement, and an unlocking position, in which the locking engagement is released, is adjustable. -

Shapes of this type are used in particular for the production of reinforced or unreinforced concrete pipes, which are used, for example, in sewage systems. To manufacture a concrete pipe, the shaped jacket is placed in the closed state, in which it can have, for example, an essentially cylindrical shape, on a production table of a production machine, as described, for example, in the brochure "SOUVERAEN, the symbiosis of experience and inventiveness" from Baumgärtner GmbH Machine factory with the printing reference W & P-JB-LeR-VN 1 -4 / 96-2. D is known. In the manufacturing machine the closed molded jacket is filled with concrete, which is then compacted in tubular form on the inner walls of the molded ice by a pressing tool that can be moved along the longitudinal axis of the molded jacket. Furthermore, it is known to form concrete pipes by pouring concrete into a mold cavity formed between the mold jacket and a mold core and vibrationally compacting it there with the aid of a vibrating device.

In both cases, the shaped jacket containing the finished but not yet hardened concrete pipe is then removed from the production machine and transported to a storage location for hardening and placed there. After opening the form jacket to facilitate demoulding, the form jacket is then removed from the concrete pipe. Because of the weight and size of the molded shells, cranes, forklifts and the like are generally used to transport them into and out of the production machine and in the corresponding production hall.

Regardless of the respective type of production, both "spring form sleeves" and "folding form sleeves" can be used to address only the most common types of shaped sleeves.

I Under a "spring form coat" is used in the context of the present

Description is understood to mean a shaped jacket with a substantially continuous mold wall in the circumferential direction, which is only interrupted by a slot connecting the two end faces of the shaped jacket. With the help of the securing device, which is arranged on the two shaped jacket sections adjacent to the slot, the

Molded jacket expanded to make it easier to remove formwork, and narrowed down again in preparation for the manufacture of the next concrete pipe. According to the above, the "widening" and "narrowing" of a spring-shaped jacket correspond to those mentioned above "Opening" and "closing" the molded jacket. It should be noted that the expansion of the mold jacket does not necessarily have to result in the mold cavity being accessible from the outside through the slot. Rather, this slot can also be closed by overlapping parts of the mutually adjacent shaped jacket sections.

In the context of the present description, however, a “folding molded jacket” is understood to mean a molded jacket which comprises at least two molded jacket parts which are pivotably hinged to one another. For example, these can be two essentially semi-cylindrical shaped jacket parts. However, it is also possible for the molded jacket according to the invention to be formed from a larger number of molded jacket parts, for example three molded jacket parts, two quarter-circle molded jacket parts being hinged to a semicircular molded jacket part and being connectable to one another by the securing device. In this case, the hinged mold shell parts are pivoted away from one another to “open” the mold shell and swiveled toward one another again to “close” the mold shell and then secured to one another by means of the securing device.

Folding Formmänte! have the advantage, compared to Spring molded shells, of placing less demands on the production environment. In particular, Spring-Formmantel must be removed "from the top", ie upwards, from the finished concrete pipe for demoulding, which requires a suitable lifting device and a sufficient height of the production hall. Folding shaped sleeves, on the other hand, can be easily accepted laterally from the finished concrete pipe. The "overhead" stripping is also more time-consuming because the molded jacket has to travel through a distance corresponding to the pipe length at least twice. The cumbersome actuation of the safety device is disadvantageous in all the above-described shaped jacket and manufacturing process variants. Usually, the at least one locking element is adjusted manually, electrically, hydraulically or pneumatically between its locking position and its unlocking position. This adjustment requires specially provided personnel or must be carried out by the workers who are responsible for inserting the molded jacket into the manufacturing machine, operating it and then removing the molded jacket from the manufacturing machine. With electrical, hydraulic or pneumatic adjustment, suitable power devices and supply connections for these power devices must also be provided. Valuable operating time is also lost by connecting and disconnecting the supply connections and operating the strength equipment. Overall, the actuation of the safety device is thus associated with mechanical and / and personnel and / or time expenditure, which is economically disadvantageous in particular in the series production of concrete pipes.

It is therefore an object of the present invention to provide a molded jacket, the safety device of which can be actuated with less effort.

According to the invention, this object is achieved by a molded jacket of the type mentioned at the outset, in which the actuating unit can be moved between an unlocking ready position corresponding to the locking position of the locking element and a ready to lock position corresponding to the unlocking position due to relative movements of the molded jacket on the one hand and its manufacturing environment on the other hand. Thus, the actuating unit of the molded jacket according to the invention can, for example, after inserting the molded jacket into the production machine by means of the one lowering onto the molded jacket Machine table are automatically adjusted in the sense of a lock and when the mold jacket is placed on a halved floor or the like by means of the mold jacket itself in the sense of an unlocking.

This is to be explained in more detail below on the basis of a preferred, particularly simple embodiment, according to which the actuating unit protrudes beyond a first, for example the lower, end face of the molded casing in its ready-to-unlock position and in its ready-to-lock position beyond a second, for example the upper, end face of the Form jacket protrudes:

After completion of a production step in the manufacturing machine, during which the at least one locking element of the securing device is in its locking position and the actuating unit thus protrudes beyond the lower end face of the molded jacket, the molded jacket is removed from the manufacturing machine, for example with the aid of a forklift, and attached to one desired location on the floor, usually the floor of a production hall. When this is turned off, the molded jacket is first placed on the floor with the actuating unit protruding downwards, which is pressed upwards relative to the molded jacket by the weight of the molded jacket and the concrete pipe contained therein until the entire molded jacket is on the floor with its lower end face , The actuating unit is thus pushed out of its ready-to-unlock position when the molded casing is switched off, and the associated at least one locking element is automatically adjusted from its locked position to the unlocked position. In contrast to the shaped shells of the prior art, no separate work steps are required for this. After opening the shell, it can be easily removed from the concrete pipe. If the actuating unit is arranged in its ready-to-unlock position in a region between the first end face and the second end surface, but adjacent to the first end surface, and in its ready-to-lock position is arranged in a region between the first end surface and the second end surface, but adjacent to the second end surface , and preferably in each case with a predetermined, non-vanishing distance from the first or the second end face, the risk of deformation of the actuating unit when opening or closing the shaped jacket by grinding on the floor or the like can thereby be prevented in a simple manner.

In order to be able to use the shaped jacket according to the invention for manufacturing a further concrete pipe in the production machine, it is only necessary to close the shaped jacket again in a known manner. However, the at least one locking element initially remains in its unlocked position, the actuating unit thus in its ready-to-lock position, in which it projects beyond the upper end face of the molded casing. The molded jacket, which is closed in this way but not yet secured, is then used, for example, again in the production machine with the aid of a forklift. As soon as the production machine is started, a machine table with the concrete feed moves down from above until it rests on the upper end face of the shaped jacket. In the case of the shaped jacket according to the invention, the actuating unit protruding at the top in its ready-to-lock position is pressed down and the associated locking element, which was in its unlocked position up to this point in time, is moved into the locked position. Thus, the shaped jacket according to the invention is also secured automatically by lowering the machine table with the aid of its securing device. From the above description of the actuation unit and the explanation of its two ready positions, it can be seen that the actuation unit can basically have a large number of embodiments which convert its displacement movement from one ready position to the other ready position in a corresponding adjustment of the at least one locking element allow. In a particularly simple and inexpensive embodiment, it is provided that the actuating unit comprises an actuating rod, which can preferably be displaced in the longitudinal direction of the molded jacket and which preferably has a greater length than the molded jacket.

In a versatile further development of the invention it is provided that the actuating rod has at least one end with a length adjustment element which is adjustable in its longitudinal direction, for example a bolt which is screwed at least in sections into or onto the actuating rod. In this way, the length of the rod can be adapted to the parameters that determine its pushing away from a standby position. For example, in the case of extremely uneven floors on which the shaped jacket according to the invention is to be placed, it may be advisable to extend the actuating rod by unscrewing a bolt provided at its lower end. Accordingly, an extension of the actuating rod by unscrewing an opposite bolt can be important if the machine table cannot be lowered sufficiently deeply.

Although the invention has been explained above on the basis of an actuating unit or actuating rod, which in its two ready positions protrudes over one of the end faces of the molded jacket, it should be pointed out at this point that this need not necessarily be the case. For example, it is possible for the actuating unit or actuating rod that does not protrude beyond the respective end face by means of a control cam is disengaged from its associated standby position, which is provided on the machine table, on the hall floor or the like. Additionally or alternatively, it is also possible for such a control cam to be arranged movably on the molded jacket. In this case, the control cam is designed as a part that is independent of the actuating rod, but can nevertheless be regarded as part of the actuating unit.

As was explained above for the preferred embodiment, the actuating unit of the molded casing according to the invention is in its ready-to-unlock position after it has been removed from the production machine, in which it protrudes beyond the lower end face of the molded casing and from which it is automatically placed when the molded casing is placed on the floor is deflected in the direction of the locking ready position. When the mold jacket is inserted into the production machine, it is in the ready-to-lock position, in which it projects beyond the upper end face of the mold jacket and from which it is deflected, for example, by the lowering machine table in the direction of the ready-to-unlock position. In order to ensure that the actuation unit assumes the other ready position immediately with each such forced movement from a standby position, an over-center mechanism can be provided which biases the actuation unit in the direction of one of the two standby positions depending on its position. In this way it is ensured that the actuating unit does not remain in an intermediate position in which it is not acted upon either by placing the molded casing on the floor or by lowering the machine table in the production machine and would therefore only have to be manually brought back into a ready position. Such top dead center mechanisms are known in the prior art and therefore do not need to be explained in more detail here. If the above-mentioned actuation rod is associated with such an over-center mechanism, it can be as long as or even shorter than the molded jacket, even if it does not interact with a control cam. In this case, the over-dead center mechanism alone has to ensure that the deflection of the actuating rod from one of its two ready positions automatically leads to the fact that it assumes its other ready position.

In an advantageous development of the invention, the at least one locking element is formed by a pivot bolt which can be pivoted when the actuating unit is actuated, and the associated counter-locking element is formed by a pin which the pivot bolt engages behind during the pivoting movement. The locking position of the locking element then corresponds to the position in which the pivot bolt engages behind the pin, while the unlocking position corresponds to the position in which the pivot bolt is pivoted away from the region of the pin. Such swivel bolts have proven themselves for securing molded sleeves against unintentional opening, in particular under the high loads which act on the molded sleeve in the production machine. In principle, however, the use of other types of locking elements is also conceivable, for example the use of hook-shaped sliding bolts which, when the actuating element is actuated, are essentially rectilinear between the locking position in which they engage behind a pin and the unlocking position in which they are removed from the pin. be relocated.

In addition, the locking element and / or the counter-locking element can be provided with wedge surfaces. By this measure it can be achieved that the molded jacket parts connected to one another by the securing device are not only secured against unintentional opening but are braced against one another, which is a good one Sealing of the molding jacket against undesired escape of molding compound, for example concrete, is guaranteed. In order to be able to adjust the tension with which the at least one locking element cooperates with the at least one counter-locking element in the locking position, it is further proposed that the locking element and / or the counter-locking element with a mechanism for adjusting the tension between locking element and counter-locking element in the locking position Is provided. When the latch element is designed as a swivel latch, this can take place, for example, in that the pin is mounted eccentrically on a fastening axis attached to the shaped jacket.

For safety reasons, it can be provided that at least one locking element of the securing device is equipped with a handle section for manual actuation. Such a grip section allows, in the event of a part of the securing device to be clamped by hand, if necessary with the aid of tools, such as e.g. a push-on tube to act on the safety device in order to open or close it. It goes without saying that such a grip section can also be attached to the actuating element with a correspondingly stable design.

Since several locking elements, for example swivel bolts, are often used in molded jackets, it is fundamentally conceivable to assign an actuating element to each of these locking elements. Thus, the molded jacket according to the invention could, for example, each have an actuating rod at different points along its circumference, which "switches" a locking element. However, it is preferably provided that a plurality of locking elements, preferably all locking elements, can be actuated by a common actuating element. This can be achieved, for example, by a design in which a plurality of locking elements are arranged one above the other when the shaped jacket is upright and are connected to one another by an actuating rod. It must also be added that the molded jacket according to the invention can also be used in the case of multiple production, ie when a plurality of molded jackets are simultaneously filled with molding compound, in particular concrete, from one and the same machine table.

The invention is explained below using a preferred exemplary embodiment with reference to the drawings. It shows:

1 shows a front view of an upright and closed shaped casing according to the invention, the actuating rod of which is in the locking ready position;

FIG. 2 shows a front view of the molded jacket from FIG. 1, the operating position being in the readiness for unlocking position;

3 is a plan view of the shaped jacket of FIG. 1 and 2 in an open position.

In the embodiment of the invention shown in FIGS. 1 to 3, the shaped jacket 10 comprises a semicircular shaped jacket part 12 and two quarter-circle shaped jacket parts 14, 1 6, which are hinged to the semicircular shaped jacket part 1 2 by means of joints 1 8. The shaped jacket parts 1 2, 14, 1 6 have ribs 20 on the outside at the same heights in the circumferential direction, which serve on the one hand to reinforce the shaped jacket 10 according to the invention and on the other hand to attach mechanical or electrical auxiliary devices (not shown).

On the left in FIGS. 1 and 2 quarter-circle shaped jacket part 14 four pivot bolts 22 are attached near that longitudinal edge of the quarter-circle shaped jacket part 1 4, which is not used for articulation on the semicircular shaped jacket part 1 2. The four swivel bolts 22 are on their from Quarter-circle shaped jacket part 1 6 articulated ends hinged to a common actuating rod 24. If the actuating rod 24 is moved from the position shown in FIG. 1, in which it projects beyond the upper end face 10a of the molded casing 10, to the position shown in FIG. 2, in which it extends over the lower end face 10b of the molded casing 1 0 protrudes, the four pivot bolts 22 are pivoted counterclockwise during this displacement movement about their respective articulation points on the quarter-circle shaped jacket part 14. In this case, each swivel bolt 22 engages behind a pin 26 which is attached to the quarter-circle shaped jacket part 16 at a height assigned to the respective swivel bar 22 outside its longitudinal edge facing the quarter-circle shaped jacket part 14. In this way, the two molded jacket parts 14, 1 6 are connected to one another and the molded jacket 1 0 is secured against unintentional opening.

With a suitable design of the swivel bolts 22 with wedge surfaces, the quarter-circle shaped jacket parts 14, 16 can also be tensioned against one another by adjusting the swivel bolts 22 from their unlocking position shown in FIG. 1 to their locking position shown in FIG. 2. This improves the tightness of the molded jacket 10 in the production of concrete pipes. In order to individually adjust the clamping force with which the swivel bolts 22 cooperate with the pins 26 in the locking position and thereby ensure a good seal against the undesired leakage of concrete at the entire height of the shaped jacket, the pins 26 can be attached to fastening things serve to attach them to the molded jacket 1 0, be formed eccentrically and rotatable about this. Of course, it is also possible to rotate the pins together with the fastening axes.

As can be seen from FIGS. 1 and 2, in the exemplary embodiment explained, the actuating rod 24 is longer than the molded jacket 10, so that it always has at least one of its two End faces, ie protrudes over the upper and / or over the lower end face. Thus, the actuating rod 24 is always in at least one of the two ready positions. In order to prevent the actuating rod 24 from adopting an undesired intermediate position in which it protrudes over both end faces of the molded jacket 10, and to prevent the actuating rod 24 from being displaced downward, for example when the molded jacket 10 is inserted into the production machine, due to a slight vibration , the mold jacket 10 has an over-center mechanism 28. This comprises a fastening plate 30 attached to the fourth-circle shaped jacket part 14 and a spring 32, one end of which is attached to the fastening plate 30 and the other end of which is attached to the actuating rod 24 in such a way that it is in the locking ready position shown in FIG. 1 and in the position shown in FIG 2 shown in the unlocking ready position of the actuating rod 24 is relaxed, but is temporarily compressed when the actuating rod 24 is shifted from one ready position to the other. As a result, the spring 32 presses the actuating rod 24 back into one of the two standby positions depending on its current position. The over-center mechanism 28 supports the functioning of the invention according to the invention with a suitable dimensioning of the spring 32 and a suitable choice of its fastening points on the fastening plate 30 and on the actuating rod 24:

If the molded casing 10 shown in FIG. 1 with the pivot bolts 22 in the unlocked position and accordingly in the ready-to-lock position is accordingly inserted into the production machine and started, the machine table is first lowered onto the upper end face of the molded casing 10, whereby it Actuating rod 24 presses down. To adjust the length of the actuating rod 24 to the dimensions of the production machine and in particular of the machine table mentioned, at the upper end of the actuating supply rod 24 a partially screwed into the actuating rod 24 bolt 34 is provided. A corresponding length adjustment bolt can also be provided at the lower end of the actuating rod 24.

If the machine table is completely lowered onto the upper end face of the molded jacket 10, the molded jacket 10 is in the position shown in FIG. 2, in which the pivot bolts 22 engage behind the pins 26 and thus secure the molded jacket. During the working steps in the manufacturing machine, the mold jacket 10 is inadvertently unsecured, i.e. an inadvertent adjustment of the swivel bar 22 from its locked position into its unlocked position is precluded by the fact that the machine table resting on the molded jacket 10 prevents the actuating rod 24 from moving upward, which is necessary for this.

After the mold jacket 10 has been removed from the production machine, for example with the aid of a forklift, the dead center mechanism 28 now prevents such an unintentional unlocking. The spring 32 of the over-center mechanism 28 is namely when the actuating rod 24 is moved downward in the production machine beyond its dead center, i.e. has been moved beyond the point of maximum compression, and therefore acts on the actuating rod 24 downward in the direction of its position shown in FIG. 2.

It goes without saying that in order to enable the described downward displacement of the actuating rod 24 in the production machine, the production table on which the mold jacket 10 is placed in the production machine must have a corresponding recess into which the actuation rod 24 can be immersed. If the molded casing 10 removed from the production machine in the position according to FIG. 2 is subsequently placed on the floor by the forklift, crane or the like, the actuating rod 24 which projects below and is therefore first placed on the ground is replaced by the weight of the molded casing 10 and of the finished concrete pipe contained in it pushed up until the entire molded jacket 1 0 is with its lower end face on the floor. The pivot bolts 22 are pivoted clockwise from the locking position shown in FIG. 2 into the unlocking position shown in FIG. 1 and thus come out of engagement with the pin 26. The molded casing 10 can now be swiveled apart by simply pivoting the two quarter-circle molded casing parts 1 4 , 1 6 are brought into the position shown in FIG. 3 in plan view, in which it can be removed from the finished concrete pipe in a simple manner.

In this upward movement of the actuating rod 24 forced by the depositing of the shaped jacket 10 on the floor, the spring 32 has in turn been moved past its dead center, so that it now acts on the actuating rod 24 in the upward direction towards its locking ready position shown in FIG. 1 ,

In the event that the displacement of the actuating rod 24 should unexpectedly not work, for example because the molded jacket 10 has been placed on a too soft floor, into which the actuating rod 24 sinks in its locking ready position shown in FIG. 2 instead of through to be pushed up, in the exemplary embodiment explained, the second pivot bolt 22 is equipped from below with a grip section 36. This grip section 36 allows a manual action on the actuating rod 24 and thus on the entire safety device, in the described case, for example, by striking the grip section 36 with a hammer. It goes without saying that, if necessary, several and even all of the swivel bolts 22 Belay device can be equipped with such handle portions 36.

The shaped jacket according to the invention can be unlocked or locked quickly and reliably in the manner described, without requiring special personnel or time, and without a pneumatic, hydraulic or electrical energy source having to be provided and connected to the shaped jacket 10. The shaped jacket 10 according to the invention therefore enables a more economical production and in particular mass production of concrete pipes, in particular due to the fact that it can be easily used together with existing production machines. The molded jacket 10 according to the invention is not limited to the embodiment described by way of example. It is of course possible, of course, to provide a plurality of actuating rods 24 on the outside of the molded jacket 10, which are assigned mutually independent locking elements and which are actuated essentially simultaneously or in succession when the machine table is lowered onto the molded jacket 10 and when the molded jacket 10 is placed on the floor. In addition, it is fundamentally also conceivable to use production machines in which the machine table is moved up to the mold jacket 10 from below or from the side. In this case, the actuating rod 24 would protrude in its ready-to-lock position over the lower or one lateral end face and would be pushed up or laterally away from the approaching machine table. To unlock the molded casing 10, this could then either be placed on the floor after a rotation of 180 ° or 90 °, or the actuating rod 24 projecting beyond the upper end face in its ready-to-unlock position could be closed by a machine in the same or a different machine moving element are pushed back in the appropriate direction.

Claims

Expectations

Shaped jacket (10) for the production of moldings, in particular for the production of concrete pipes, the mold jacket (1 0) can be brought into a closed production position for preparation of the production of the moldings and is evident from this production position for demoulding the manufactured moldings, with two for Closing or opening the form jacket

(10) mold jacket sections (14, 16) which are movable relative to one another, a securing device is provided, by means of which the molded jacket (10) can be secured in the production position, the securing device comprising at least one locking element (22) which is attached to a (14) the shaped jacket sections

(14, 1 6) is attached, and at least one counter-locking element (26), which is attached to the respective other shaped jacket section (1 6), the at least one locking element (22) by means of an actuating unit (24) between one of the production positions of the

Shaped jacket (10) corresponding locking position, in which it is in locking engagement with an associated counter-locking element (26), and an unlocking position in which the locking engagement is released, is adjustable, characterized in that the actuating unit (24) due to the manufacturing process Conditional relative movements of the molded jacket on the one hand and its manufacturing environment on the other hand can be transferred between an unlocking ready position corresponding to the locking position of the locking element (22) and a locking ready position corresponding to the unlocking position.

2. Sheath according to claim 1, characterized in that the actuating unit (24) in its ready-to-unlock position projects beyond a first end face (10b) of the shaped jacket (10) and in its ready-to-lock position over a second end face (10a) of the shaped jacket

(10) protrudes.

3. Shaped jacket according to claim 2, characterized in that the first end face (10b) is the lower end face during operation of the shaped jacket (10) and the second end face (10a) is the upper end face during operation of the shaped jacket (10).

4. Shaped jacket according to one of the preceding claims, characterized in that the actuating unit (24) preferably a displaceable in the longitudinal direction of the molded jacket (10)

Actuating rod (24) comprises.

5. Sheath according to claim 4, characterized in that the actuating rod (24) has a greater length than the shaped jacket (10).

6. Shaped jacket according to claim 4 or 5, characterized in that the actuating rod (24) has at least one end in its longitudinal direction adjustable length-adjusting element (34), for example a bolt screwed at least in sections into or on the actuating rod.

7. Sheath according to one of the preceding claims, characterized in that an over-center mechanism (28) is provided, which the actuating unit (24) in dependence biased from their position towards one of the two ready positions.

8. Sheath according to one of the preceding claims, characterized in that the at least one locking element (22) by a pivot bar when actuating the actuating unit (24) and the associated counter-locking element (26) by one of the pivot bar (22) at the Pivotal movement behind engaging pin (26) is formed.

9. Sheath according to one of the preceding claims, characterized in that the locking element (22) and / or the counter-locking element (26) are provided with wedge surfaces.

1 0. Sheath according to one of the preceding claims, characterized in that the locking element (22) and / or the counter-locking element (26) is equipped with a mechanism for adjusting the tension between the locking element (22) and counter-locking element (26) in the locking position.

1 1. Shaped jacket according to claims 8 and 10 and, if desired, claim 9, characterized in that the pin (26) is mounted eccentrically on a fastening axis attached to the shaped jacket (10).

12. Sheath according to one of the preceding claims, characterized in that at least one locking element (22) of the securing device is equipped with a handle section (36) for manual actuation.

1 3. Sheath according to one of the preceding claims, characterized in that a plurality of locking elements (22), preferably all locking elements (22), can be actuated by a common actuating unit (24).

1 4. Shaped jacket according to one of the preceding claims, characterized in that it comprises at least two swivel-mounted molded jacket parts (1 2, 14, 1 6).

1 5. Shaped jacket according to claim 14, characterized in that it is formed from three shaped jacket parts (1 2, 1 4, 16), two quarter-circle shaped jacket parts (14, 16) pivotally connected to a semi-circular shaped jacket part (1 2) and can be connected to one another by the securing device.

1 6. Molded jacket according to one of claims 1 to 1 3, characterized in that it has a substantially continuous mold wall in the circumferential direction, which is only interrupted by a slot connecting the two end faces of the molded jacket.

17. Sheath according to one of claims 2 to 1 6, characterized in that the actuating unit (24) in its unlocking ready position in an area between the first end face (10b) and the second end face (10a), but adjacent to the first end face (10b) , and is arranged in its ready-to-lock position in a region between the first end face (10b) and the second end face (10a), but adjacent to the second end face (10a), preferably in each case with a predetermined, non-disappearing distance of the first end face (10b) or the second end face (10a).