Press jaw, drive press jaw, press insert and system for pressing fittings with pipes

Description

[0001] The invention relates to a pressing jaw for pressing fittings with pipes with a pressing insert and with a driving pressing jaw as well as a system for pressing fittings with pipes, with at least two pressing inserts and with a driving pressing jaw.

[0002] The invention also relates to a drive pressing jaw for pressing fittings with pipes by means of a pressing insert, with two drive pressing jaw halves, with joint elements for connecting the drive pressing jaw halves, with coupling elements for detachable connection with a pressing insert and with force transmission elements.

[0003] The invention also relates to a press insert for pressing fittings onto pipes, comprising at least two press segments, pressing contours formed in the press segments, joint means for connecting the press segments, coupling means for releasably connecting them to a drive press jaw, and force transmission means. At least two press segments are used as parts of a press jaw for pressing the fittings.

[0004] Finally, the invention also relates to a system for pressing fittings with pipes, with at least two pressing inserts and with a drive pressing jaw.

[0005] The technical field relevant to the present invention is the on-site installation of piping systems, in which a piping system consisting of pipe sections and fittings is generally installed to conduct and transport a fluid, i.e., a liquid or a gas. A fitting is essentially a connecting piece for a pipeline, and a fitting is most commonly used to connect two or more pipe sections. Accordingly, the fitting preferably has two or more press sections, for example in the form of press sleeves. The most common fittings include straight connections, changes of direction in the form of pipe bends, reducers, branches such as T-pieces or intersections. However, a fitting can also be understood to mean a pipe connection of a valve or other component. For example, thermometers or pressure gauges, as fittings, only have one connection for one pipe section.Thus, the fitting of a valve has only one press section to connect a pipe section to the valve.

[0006] Press connections are used to connect pipe sections to fittings and other components. A press section of a fitting is radially deformed inward using a press jaw when the pipe section is inserted, creating a permanent, tight, and possibly even permanent connection. The fittings can be provided with a sealant, such as an O-ring, to ensure the tightness of the connection, or they can be sealed by direct contact between the materials of the pipe section and the fitting, for example, a metallic seal.

[0007] The pressing technology used for radial forming of the pressing section primarily includes radially acting pressing systems as well as pressing systems that use radial-axial pressing, whereby a part of the fitting is displaced axially during the pressing process in order to effect radial forming.

[0008] The pipeline systems described above are primarily used to transport drinking or heating water, gas for operating a heating system, or industrial gases. In principle, any fluid medium can be transported in the pipelines.

[0009] Rigid pipes can be made from solid and high-strength materials, particularly metallic materials or hard plastics. Rigid pipes are preferred for installations with larger straight sections along walls or ceilings, or within wall or ceiling structures.

[0010] In contrast, flexible pipes are used in installations, particularly plastic pipes, so-called all-plastic pipes, or pipes made of composite materials, so-called multi-layer composite pipes, consisting of one or more layers of plastic and one or more thin layers of metal. Flexible pipes are used in particular for the installation of pre-wall technology such as retrofitted plumbing systems, where the flexible pipes are often bent on-site in tight spaces and installed in a curved state.

[0011] Furthermore, rigid and flexible pipes are available in various outer diameters. For metal pipes, outer diameters in the range of 6 mm - 108 mm and larger up to approximately 150 mm, corresponding to 6 inches, are used. For plastic pipes, the outer diameters are typically in the range of 6 mm - 63 mm, although significantly larger outer diameters are also used here.

[0012] Rigid pipes and flexible pipes differ, regardless of the material properties and dimensions of the pipe, in that a rigid pipe can be connected using an externally sealing fitting, whereas a flexible pipe can only be connected using an internally sealing fitting. Due to its rigid nature, the dimensional stability of the rigid pipe is sufficiently great to absorb the forces generated during radial pressing and to ensure the sealing, holding, or fixing function together with the pressed fitting. Flexible pipes, on the other hand, are supported from the inside by a support sleeve and are formed onto the support sleeve when the fitting is pressed. Fittings for rigid pipes are therefore externally sealing fittings, while fittings for flexible pipes are internally sealing fittings.

[0013] When installing a piping system that uses both rigid and flexible pipes, matching pipe dimensions are selected for the inner and outer diameters. The exact values may only match pairwise by chance, so matching dimensions are selected with the best possible match. In combination with the specific fittings for rigid and flexible pipes, specific fitting geometries and die geometries generally exist for each system or dimension.

[0014] Therefore, different press jaws must be kept on site for different pipes and fittings. This requires considerable effort on site, as multiple press jaws driven by a single press tool, or possibly even different press tools, must be kept on hand. This results in a very wide product variety and the associated production, storage, and logistics, resulting in high acquisition costs for the user.

[0015] Various types of pressing jaws are used. Firstly, there are pressing jaws that each have a specific pressing contour. These are also called standard pressing jaws and, as a set for multiple pressing contours, are quite heavy.

[0016] Secondly, systems for pressing fittings onto pipes are known that feature at least two pressing inserts, but usually a complete set of pressing inserts, with which different fittings with corresponding pressing contours can be pressed. The pressing inserts are coupled in pairs to the drive pressing jaw and then used to press a fitting. A set of pressing inserts for, for example, six pressing dimensions with external dimensions of 12, 15, 18, 22, 28, and 35 mm, or six pairs of individual pressing inserts, are part of the system along with the drive pressing jaw. This saves a certain amount of weight compared to standard pressing jaws, since only one drive pressing jaw is required.

[0017] Furthermore, the individual pressing dies are usually not connected to each other and can therefore be interchanged, resulting in different pressing jaws with different pressing contours being coupled to the drive pressing jaw and used. This results in incorrectly crimped fittings. Likewise, the pressing dies can be easily lost, resulting in pairs of pressing jaws falling apart. Furthermore, the pressing dies of interchangeable pressing jaws are generally difficult to grasp. Furthermore, the pressing jaws are often interchanged.

[0018] Furthermore, the external dimensions of the press jaws of the drive press jaw are designed for the largest pressing dimension. In contrast, the external dimensions of a standard press jaw are generally optimized for the respective pressing dimension, so that the dimensions and weight are as small as possible. Accordingly, the press jaws of the drive press jaw are oversized for smaller pressing dimensions. At the same time, accessibility to the pressing point is limited, and the overall weight of the press jaw with interchangeable press inserts is higher than that of a standard press jaw.

[0019] The loading mechanisms of conventional systems for exchanging press dies typically require two-handed operation and involve two work steps. This complicates the handling of the press systems. The coupling mechanisms weaken the design compared to standard press jaws, even with the same installation space. While offering the same strength, the interchangeable press jaw is heavier and larger than the standard press jaw.

[0020] In addition, pressing collars are known, consisting of two or more pressing segments that are placed around the area of the fitting to be pressed and pressed together by means of a pulling jaw at the open end in order to press the fitting. For this purpose, the pressing collar has a recess on both pressing segments or on the two outer pressing segments, into which the pulling jaw engages and pulls the pressing collar into the closed position. This presses the fitting. Press collars are often used in inaccessible areas of the installation, for example in the corners of a room, when applying a pressing jaw is difficult or impossible. The pulling jaw can then be operated from a greater distance from the fitting without having to grip the fitting yourself.

[0021] The pressing collars must also be kept in stock for all pressing dimensions, which further increases the effort on a construction site. DE 10 2007 047 339 A1 discloses a pressing jaw for pressing fittings onto pipes. The pressing insert is releasably coupled to the drive pressing jaw via a spring device, with the coupling elements arranged opposite one another on the pressing jaw halves, predominantly in the center of the pressing contour, between the inlet opening and the articulation means of the pressing jaw. The coupling mechanism requires two-hand operation to exchange the pressing inserts. The pressing surfaces are arranged at positions corresponding to the coupling elements. This arrangement ensures that predominantly vertical force components are transferred from the drive pressing jaw to the pressing insert during the pressing process, thus preventing the pressing insert from becoming detached from the pressing jaw.

[0022] From EP 3 381 618 A1 and DE 20 2005 008125 U1, pressing means for use as a pressing loop with a suitable tool are also known.

[0023] The aim of the present invention is therefore to further reduce the overall weight of a system for pressing fittings onto pipes and to enable convenient one-handed changing of the pressing dies on the drive pressing jaw. Furthermore, the pressing dies are to be used multiple times to expand the functionality of the system and its components.

[0024] Therefore, the present invention is based on the technical problem of further improving the handling and application possibilities of the pressing jaw, the drive pressing jaw, the pressing insert and the system for pressing fittings with pipes.

[0025] The technical problem outlined above is solved according to a first teaching of the invention by a pressing jaw for pressing fittings with pipes, comprising a pressing insert and a driving pressing jaw, wherein the pressing insert comprises: at least two pressing segments, a pressing contour formed in the pressing segments, articulation means for connecting the pressing segments, coupling means for releasably connecting them to the driving pressing jaw, and force transmission means, wherein the driving pressing jaw comprises: two driving pressing jaw halves, articulation elements for connecting the driving pressing jaw halves, coupling elements for releasably connecting them to the pressing insert, and force transmission elements, wherein the articulation means pivotably connect the pressing insert to the driving pressing jaw, and wherein the force transmission means and the force transmission elements are arranged at least predominantly, preferably entirely, in a region between the center of the pressing contour and the articulation means.

[0026] In the pressing jaw according to the invention, the pressing insert is connected to the coupling elements of the drive pressing jaw by means of the coupling means and the pressing insert is actuated by a movement of the drive pressing jaw.

[0027] The area between the center of the pressing contour and the articulation means can be described as follows: when viewing the pressing jaw from the side, the pressing jaw is aligned horizontally and the drive of the pressing tool runs horizontally. The axis of the pressing contour is perpendicular to the side view, with the center of the pressing contour preferably corresponding to the axis of the pressing contour and thus to the axis of the pipe to be connected. The alignment of the axis of the articulation means of the pressing insert is also perpendicular to the side view. The area between the center of the pressing contour and the articulation means then corresponds to the space between a plane extending perpendicular to the axis of the pressing contour and perpendicular to the horizontal direction and a plane extending perpendicular to the axis of the articulation means and perpendicular to the horizontal direction.

[0028] With this design of the pressing jaw, the force is introduced into the pressing insert by the two force transmission elements not in opposite directions and parallel, but at an angle to each other. Therefore, the forces do not cancel each other out, resulting in a linear force component.

[0029] The force transmission means and the force transmission elements jointly generate a force compressing the pressing insert, which is directed from the position of the articulation means away from the drive pressing jaw. When the force is divided into a vertical component directed toward the center of the pressing contour and a horizontal component perpendicular to it, the resulting force has a non-zero horizontal component, which is preferably directed horizontally away from the articulation means.

[0030] Therefore, the pressing insert is mounted opposite the drive pressing jaw to compensate for the resulting force. The drive pressing jaw no longer has to completely surround the pressing insert, resulting in a smaller overall volume, a lower weight, and easier handling.

[0031] Preferably, the force transmission means and the force transmission elements are each designed as contact surfaces. This enables a surface-to-surface force transmission independent of the coupling of the pressing inserts to the drive pressing jaw halves of the drive pressing jaw, which evenly distributes the contact pressure. Even though the coupling means can also transmit force due to the mechanical contact, the separation of the coupling elements and the force transmission elements also achieves a significant separation of the coupling and force transmission functions.

[0032] The contact surfaces preferably have an angle α greater than 10°, preferably greater than 25°, in particular greater than 40°, to one another in pairs. An angle α greater than 80° has proven to be an optimal angle. For this purpose, the contact surfaces are preferably flat so that a plane can be assigned to them. Alternatively, the contact surfaces can be round or curved, in which case a central flat profile can be assigned to the contact surfaces, for example by forming a plane arranged at the end points of the contact surfaces or a tangential plane arranged at a central position of the contact surfaces perpendicular to a surface normal. The angle is measured between the planes of the contact surfaces of the press segments or the two drive jaw halves, with an angle of 0° meaning planes running parallel to one another.

[0033] If the contact surfaces are preferably flat, a larger surface oriented perpendicular to the direction of force transmission from the drive pressing jaw to the pressing insert is created, allowing for more effective force transmission. If the outer sides of the pressing segments and / or the contact surfaces are preferably rounded, so that the outer sides of the two pressing segments, when the pressing insert is closed, at least in sections, lie on the radius of a common circle, the process of coupling the pressing insert to the drive pressing jaw is simplified.

[0034] There are various ways of arranging the axes or axes of rotation of the various elements of the pressing jaw. In a preferred embodiment of the pressing jaw, the pressing insert and the drive pressing jaw halves are arranged so that they can pivot about the same axis. Thus, both the pressing segments of the pressing insert and the two drive pressing jaw halves rotate about the same axis; the joint means and the joint elements are therefore arranged so that they can rotate and pivot on the same axis. With this design of the pressing jaw, when the drive pressing jaws rotate, the pressing segments of the pressing insert are driven to pivot about the same axis, so that the contact surfaces of the drive pressing jaw and the pressing segment are not displaced against each other during rotation.

[0035] In an alternative design of the press jaw, the press insert and the drive press jaw halves can be pivoted about different axes, whereby the drive press jaw halves can have the same axis or different axes. This enables a design with two or three axes, whose positions relative to each other can be optimized with regard to geometric and / or force properties.

[0036] For this embodiment of the pressing jaw, it is further preferred that the joint means be designed as a hollow bolt supporting two pressing segments each. The two pressing segments are arranged on the hollow bolt and slide over its surface during rotation. The hollow bolt feature enables the use of a locking bolt of the drive pressing jaw by inserting the locking bolt into the hollow bolt and locating it therein.

[0037] Furthermore, it is preferred that the joint elements of the drive pressing jaw comprise a hollow pin connecting both drive pressing jaw halves. The two drive pressing jaw halves, for example, have tabs on both sides, each of which is connected to the hollow pin and slides along the hollow pin during the pivoting movement. Since the hollow pin is continuous, in this embodiment the drive pressing jaw halves have an axis that is offset from the axis of the pressing insert.

[0038] Preferably, the joint elements of the drive pressing jaw comprise two hollow bolts, each of which is connected to a retaining lug on either side, and which pivotably mount the drive pressing jaw halves about a common axis. The hollow bolts each receive the lugs of the drive pressing jaw halves on one side. Additionally, the hollow bolts can be spaced apart from one another in the area between the retaining lugs, allowing the hollow bolt of the pressing insert to be positioned in the space between the two hollow bolts of the drive pressing jaw. Thus, both the pressing segments of the pressing insert and the drive pressing jaw halves of the drive pressing jaw are arranged on a common axis.Since both parts rotate around the same axis, the pressing process can be carried out with a force transmission using flat force transmission means and force transmission elements without sliding of the surfaces and thus without friction losses.

[0039] In a further preferred manner, the hollow bolt supporting each of the two pressing segments of the pressing insert is arranged between the two hollow bolts supporting the drive pressing jaw halves of the drive pressing jaw. A locking bolt is also preferably arranged in the hollow bolt as a common pivot axis. If the drive pressing jaw halves of the drive pressing jaw are driven to pivot by a pressing device, they transmit the pressing force to the pressing segments of the pressing insert, whereby the pivoting around the same common axis is carried out effectively and without frictional losses due to force transmission surfaces sliding against one another.

[0040] The hollow pins of the drive jaw halves of the drive press jaw can be secured either in the press jaw holder on the retaining tabs or in the drive jaw halves of the drive press jaw. In the latter case, the hollow pins in the drive press jaw are interchangeable.

[0041] Thus, the actuation behavior of the coupled press jaw arrangement is identical to that of the standard press jaw. The synchronization of the rotational movement of both drive press jaw halves and the pressing segments of the press insert is ensured by the connection with a common joint.

[0042] The coupling means and the coupling elements can enable both a positive and a frictional connection. A positive connection can be achieved by the configuration described below, either as a T-slot and head pin or as a coupling pin and a recess. The frictional connection can be achieved, for example, by an arrangement of magnets, which preferably exert an attractive force centering the desired position.

[0043] For a positive connection, in a first embodiment, the coupling means preferably have coupling pins with head ends, wherein the coupling elements have partially opened T-slots and receive the coupling means.

[0044] For this purpose, the T-slots have undercuts on the open side toward both side walls, creating a rail. The coupling means of a press insert in the form of a head pin can then engage in the T-slot and be moved within it without the head pin becoming disengaged. Furthermore, the coupling means can be designed such that, when connected, there is mechanical play between the coupling means and the coupling elements. In this design, the press insert and the drive press jaw are coupled to one another, but at the same time can be easily moved or pivoted and, if necessary, are suitable for sliding during the pressing process.

[0045] For this purpose, the head ends have a radius larger than the radius of the pin section. The coupling pin is thus suitable for engaging behind an undercut configuration of a coupling element of the drive jaw. Such an undercut configuration is realized by the partially open T-slot of the coupling elements of the drive jaw, with which a coupling pin can be slidably engaged with its head end.

[0046] A T-slot is defined as a slot with a rectangular cross-section corresponding to the T-shaped crossbar and a narrower, downwardly open section corresponding to the vertical T-shaped line. The directions "top" and "bottom" are chosen only as examples to allow comparison with the letter "T."

[0047] The head of the head pin is positioned in the rectangular section of the T-shaped crossbeam, and the pin section of the head pin extends along the vertical T-shaped line. The head and the crossbeam then form a coupling essentially perpendicular to the orientation of the T-shaped crossbeam, which can only be released by sliding it along the groove open on both sides.

[0048] In a second embodiment of the pressing jaw, the coupling elements have coupling pins for a positive connection and the coupling means have recesses and receive the coupling elements.

[0049] For this purpose, the coupling elements preferably have coupling pins in the form of a solid cylinder with a constant radius, and the recesses are shaped such that the coupling elements engage in the recesses by contact, so that the drive pressing jaw and the pressing insert are releasably connected by means of the coupling elements and coupling means. The coupling pins are preferably provided on two opposite inner sides of the drive pressing jaw halves of the drive pressing jaw.

[0050] The recesses serving as coupling means can be arranged at two opposite locations on the outer sides of the pressing segments of the pressing insert, preferably completely in a region between the center of the pressing contour of the pressing insert and the articulation means of the pressing insert, particularly preferably in a direction perpendicular to the horizontally oriented drive pressing jaw with connected pressing insert above and below the articulation means of the pressing insert.

[0051] Preferably, the design of the recesses results in a projection behind which the coupling pins engage during the coupling process of the pressing insert with the drive pressing jaw; the coupling pins rest against the projection and fit positively into the grooves formed by the recesses.

[0052] This design of the coupling elements and coupling means allows the number of parts to be produced in a pressing system to be reduced, as the coupling pins are only provided in the drive pressing jaw, and the various pressing inserts or the pulling insert only have recesses. This type of system is mechanically easier to manufacture. Additionally, reducing the number of elements protruding from the component silhouette results in advantages in handling the pressing tool. The pressing tool and the individual parts of the system are more comfortable to grip and offer less potential for snagging on the operator's clothing.

[0053] As described above, the drive press jaw can have retaining tabs arranged on both sides to hold and support the individual components together. A drive mechanism can also be connected to it, in particular designed as a double roller ram with two rollers, to form an operative connection with a pressing tool, in particular a hydraulically or electrically operated one. However, the drive of the drive press jaw halves can also be implemented by a toggle lever.

[0054] The pressing insert can also have a spring, preferably designed as a torsion spring, which compresses the pressing segments of the pressing insert. When the pressing segments of the pressing insert are coupled to the drive pressing jaw halves of the drive pressing jaw, the spring also compresses the drive pressing jaw halves of the drive pressing jaw. This facilitates the assembly of the pressing jaw, consisting of the drive pressing jaw and pressing inserts, onto a fitting. To support this movement, such a spring can also be provided in the drive pressing jaw.

[0055] To couple the pressing insert to the drive pressing jaw, it can be brought together in a slightly pivoted position with the drive pressing jaw halves of the drive pressing jaw, whereby the coupling means, in particular the coupling pins, engage in the openings of the coupling elements, in particular the T-slots. By turning the pressing insert back, the coupling pins engage in the undercut of the T-slots. If, for example, the opening of the hollow bolt of the pressing insert is then congruent with the locking bolt arranged in one of the hollow bolts of the drive pressing jaw, the locking bolt can be inserted.

[0056] The same coupling process can also be realized by designing the coupling means as a recess and the coupling elements as a pin.

[0057] In principle, the pressing jaw can be used with one of the following described configurations of the pressing insert and / or with one of the following described configurations of the drive pressing jaw.

[0058] The technical problem outlined above is solved according to a second teaching by a drive pressing jaw for pressing fittings with pipes by means of a pressing insert, with two drive pressing jaw halves, with joint elements for connecting the drive pressing jaw halves, with coupling elements for detachable connection to a pressing insert and with force transmission elements, wherein the joint elements enable pivoting of the drive pressing jaw halves about a common axis or about two different axes, wherein connecting elements are provided for pivotably connecting the pressing insert and wherein the force transmission elements are arranged at least predominantly, preferably completely, in a region between the center of the pressing contour of the pressing insert to be connected and the joint means of the pressing insert to be connected.

[0059] The advantages of the various preferred embodiments already described for the pressing jaw apply equally to the drive pressing jaw, so that reference is made to the previous explanations at the appropriate points.

[0060] Preferably, the force transmission elements are designed as contact surfaces and the contact surfaces have an angle α greater than 10°, preferably greater than 25°, in particular greater than 40°, particularly preferably greater than 80° to one another.

[0061] Furthermore, the connecting elements and the joint elements can have the same axis or axis of rotation.

[0062] Alternatively, the connecting elements and the joint elements can have different axes, whereby the joint elements enable the drive press jaw halves to pivot about a common axis or about different axes.

[0063] Furthermore, the coupling elements can have partially open T-slots for releasably receiving coupling means of the press insert, and the force transmission elements can be designed as contact surfaces. Thus, the coupling elements enable the press insert to be held pivotably.

[0064] Alternatively, the coupling elements can have coupling pins. The coupling pins can thus engage with correspondingly designed coupling means of a press insert and enable the press insert to be held pivotably.

[0065] In addition, a spring, in particular a torsion spring, can be arranged in the drive pressing jaw, which pulls the drive pressing jaw halves together.

[0066] A design of the joint elements with at least one hollow bolt connecting both drive press jaw halves can also be provided. The hollow bolts can each be connected to a retaining tab of the drive press jaw. Furthermore, the hollow bolts can pivot the drive press jaw halves around the common axis, and if necessary, the hollow bolts can be spaced apart from one another in the area between the retaining tabs.

[0067] This drive press jaw does not serve directly as a press jaw, but rather transmits a pressing force to the connected press insert. The design of the coupling elements is adapted to the coupling means of the press insert and enables a detachable connection. The coupling and force transmission functions are largely separated, allowing for a specific design for both functions.

[0068] For this purpose, the coupling elements can have partially open T-slots. The T-slots have undercuts on the open side toward both side walls, creating a rail. The coupling means of a press insert in the form of a head pin can then engage in the T-slot and be moved within it without the head pin becoming disengaged. Alternatively, coupling pins and recesses of the type described above can be provided.

[0069] The drive pressing jaw further comprises a common holding structure, which is preferably designed as holding tabs arranged on both sides for holding and connecting the drive pressing jaw halves and the pressing segments of the pressing insert.

[0070] The coupling elements are also designed to partially enable pivoting of the pressing insert. For this purpose, the joint of the pressing insert is pivotably connected to the drive pressing jaw, preferably with the described tabs. Part of the coupling is achieved by the rotatable and pivotable connection of the pressing insert.

[0071] Furthermore, it is preferred that the joint elements of the drive pressing jaw comprise a hollow pin connecting both drive pressing jaw halves. The two drive pressing jaw halves have tabs on both sides, each of which is connected to the hollow pin and slides along the hollow pin during the pivoting movement. Since the hollow pin is continuous, in this embodiment the drive pressing jaw halves have a pivot axis that is offset from the axis of the pressing insert.

[0072] Preferably, the joint elements of the drive pressing jaw comprise two hollow bolts, each of which is connected to a retaining lug on either side, and which pivotably mount the drive pressing jaw halves about a common axis. The hollow bolts each receive the lugs of the drive pressing jaw halves on one side. Additionally, the hollow bolts can be spaced apart from one another in the area between the retaining lugs, allowing the hollow bolt of the pressing insert to be positioned in the space between the two hollow bolts of the drive pressing jaw. Thus, both the pressing segments of the pressing insert and the drive pressing jaw halves of the drive pressing jaw are arranged on a common axis.Since both parts rotate around the same axis, the pressing process can be carried out with a force transmission using flat force transmission means and force transmission elements without sliding of the surfaces and thus without friction losses.

[0073] To fix the hollow bolts to the common axis, a locking bolt is preferably used, which is inserted into the hollow bolts and held in position with a fixing device.

[0074] The aforementioned technical problem is solved according to a third teaching by a press insert for pressing fittings with pipes, comprising at least two press segments, pressing contours formed in the press segments, joint means for connecting the press segments, coupling means for releasably connecting them to a drive press jaw, and force transmission means. The press insert thus initially functions as a press jaw insert that can be connected to a drive press jaw described below. The press insert is further characterized in that the press segments have attachment means for attaching a tension jaw.

[0075] There are two options for arranging the attachment means on the pressing insert relative to the joint means. On the one hand, the attachment means can be arranged in the area behind the center of the pressing contour, as viewed from the joint means. Thus, the attachment means for the pulling insert of a pulling jaw are located where the pressing insert can be opened to be positioned on a fitting prior to pressing. The opened section is then compressed by the pulling jaw, and the fitting is pressed.

[0076] Alternatively, the attachment means can be arranged in a region between the center of the pressing contour and the articulation means. For the definition of this region, reference is made to the arrangement explained above in connection with the pressing jaw. Thus, the attachment means are arranged between the center of the pressing contour and the articulation means.

[0077] The attachment means are arranged on the outside of the pressing segments and the pressing insert can therefore be used not only as a pressing jaw insert for a connection with a drive pressing jaw but also as a pressing sling, which can be attached to a fitting independently of the drive pressing jaw and then pressed using a pulling jaw.

[0078] The pressing inserts are designed as a pressing jaw insert with at least two pressing segments connected to each other via the joint means. This can be pressed on the one hand from the joint means side by means of the force transmission means and the application of force by the drive pressing jaw, and on the other hand from the open closing side by means of the attachment means. Furthermore, a single pressing insert is easier to handle in terms of size, since the size and thus the weight of the individual pressing insert can be adapted to the specific pressing contour to be pressed.

[0079] Advantageously, the pressing inserts with the respective pressing contour for a pressing dimension can be used both as a pressing jaw insert for a pressing jaw and as a pressing sling, which can then be pressed by a tension jaw. A pressing sling can have two or more articulated pressing segments, which can also be referred to as a pressing jaw insert when there are two pressing segments, and as a pressing sling or pressing chain when there are more than two pressing segments. The term "press sling" is used generally below.

[0080] The attachment means in the pressing segments are preferably designed as recesses for receiving the traction means of the pulling jaw. The traction means can then engage in the recesses with appropriately designed projections and compress the pressing segments of the pressing insert.

[0081] Furthermore, the recesses can allow the tensioning means to be positioned at at least two, preferably several, different angles relative to the axis of the pipe to be pressed. This allows the tensioning jaw to be positioned particularly in confined spaces, especially when positioning at a right angle to the axis of the pipe to be pressed is not possible. Preferably, the recesses are rotationally symmetrical and the tensioning means are dome-shaped, allowing positioning at any angle.

[0082] Furthermore, the joint means preferably enable, as part of the coupling means, a pivotable fastening of the pressing insert to a drive pressing jaw.

[0083] In addition, the joint means can be designed as a hollow bolt supporting two pressing segments each. The two pressing segments are arranged on the hollow bolt and slide over its surface during rotation. The hollow bolt design allows the use of a locking bolt of the drive pressing jaw by inserting the locking bolt into the hollow bolt and locating it therein.

[0084] Furthermore, the coupling means can have coupling pins provided with head ends. The head ends have a radius larger than the radius of the pin section. The coupling pin is thus suitable for engaging behind an undercut formation of a coupling element of the drive jaw. Such an undercut formation can, for example, be a partially open T-slot of the coupling elements of the drive jaw, with which a coupling pin can be displaceably engaged with its head end. It is advantageous if the coupling means are designed such that, in the connected state, there is mechanical play between the coupling means and the coupling elements. This allows the coupling pins and the T-slots to be coupled, but can be easily moved relative to one another for coupling and, if necessary, for sliding during the pressing process.

[0085] The coupling pins and the force transmission means are preferably arranged on the outside of the pressing segments in the area facing the articulation means. Thus, the force transmission through the drive pressing jaw takes place close to the articulation axis of the pressing insert.

[0086] Alternatively, the coupling means may have recesses for releasably receiving coupling elements of the drive pressing jaw. The recesses are preferably arranged on the outer side of the pressing segments in the region facing the articulation means, particularly preferably in a direction perpendicular to an axis that divides the pressing insert into two pressing segments, above and below the articulation means.

[0087] The force transmission means of the pressing insert are preferably designed as contact surfaces, so that the force transmission elements of the drive pressing jaw, which are designed as contact surfaces, transmit the force over a large area and can slide off it if necessary during pressing.

[0088] Furthermore, it is advantageous for the described pressing insert if an elastic spring is provided to close the pressing segments. The spring can be designed as a torsion spring and closes the pressing insert both in its function as a pressing loop and in its function as a pressing jaw insert of the drive pressing jaw.

[0089] The spring secures the pressing insert, preferably axially, by means of a further hollow bolt, on which the pressing insert is preferably pivotably mounted. The spring can then preferably engage at least half the wire thickness in the hollow bolt. The axial securing by means of the spring allows the pressing insert to be designed particularly narrowly, in particular narrower than a pressing insert secured by means of external retaining rings. Overall, the drive pressing jaw described above and the entire construction of the pressing jaw described above can be designed to be more space-saving, which simplifies working in hard-to-reach, narrow spaces.

[0090] The technical problem outlined above is solved according to a fourth teaching by a system for pressing fittings to pipes, comprising at least two pressing inserts and a drive pressing jaw. The pressing inserts have at least two pressing segments, pressing contours formed in the pressing segments, articulation means for connecting the pressing segments, coupling means for releasably connecting them to the drive pressing jaw, and force transmission means, wherein the at least two pressing inserts have different pressing contours. The drive pressing jaw has two drive pressing jaw halves, articulation elements for connecting the drive pressing jaw halves, coupling elements for releasably connecting them to the pressing insert, and force transmission elements. The system is characterized in that at least one pressing insert with attachment means for attaching a pulling jaw and a pulling insert are provided.The tension insert comprises two tension insert halves, joint means for connecting the tension insert halves, coupling means for releasably connecting them to the drive pressing jaw, and force transmission means, as well as tension means arranged opposite the joint means. The coupling means and the force transmission means are arranged on the outside of the tension insert halves. The tension insert and the drive pressing jaw together form the tension jaw.

[0091] Thus, the system not only comprises a set of pressing inserts and a drive pressing jaw, but also a tension insert for compressing the at least one pressing insert with attachment means for use as a pressing sling. In this system, the pressing inserts are suitable, on the one hand, as pressing jaw inserts for a drive pressing jaw. On the other hand, the pressing inserts can also be used as a pressing sling, which can then be compressed using the tension insert, whereby the tension insert can also be coupled to the drive pressing jaw using the same or corresponding coupling means.

[0092] Preferably, the tensioning means allow for insertion into the attachment means at at least two, preferably several, different angles relative to the axis of the pipe to be pressed. Since the pressing inserts are used as pressing loops in confined spaces, pressing is simplified if the tensioning means can be attached to the attachment means of the pressing insert at different angles.

[0093] In particular, the drive pressing jaw is designed according to one of the previously explained embodiments and / or the pressing insert is designed according to one of the previously explained embodiments.

[0094] In the following, the invention is explained using exemplary embodiments with reference to the drawing. Fig. 1a-f shows an embodiment of a system for pressing fittings with pipes in a schematic representation, Fig. 2a-c shows a first embodiment of a pressing jaw with a pressing insert and a driving pressing jaw, Fig. 3a-b shows the pressing jaw according to Fig. 2 during the coupling process of the pressing insert with the drive pressing jaw, Fig. 4a-b drive pressing jaw of a pressing jaw according to Fig. 2 , Fig. 5a-the pressing insert of a pressing jaw according to Fig. 2 , Fig. 6a-the first embodiment of a train insert, in particular for a system according to Fig. 1e und f , Fig. 7a-c a second embodiment of a pressing jaw with a pressing insert and a drive pressing jaw, Fig. 8a-c the pressing jaw according to Fig. 7 in the open state, Fig.9a-bthe pressing jaw Fig. 7 during the coupling process of the pressing insert with the drive pressing jaw, Fig. 10a-b drive pressing jaw of a pressing jaw according to Fig. 7 , Fig. 11a-the pressing insert of a pressing jaw according to Fig. 7 , Fig. 12a-b third embodiment of a drive pressing jaw, Fig. 13a-b pressing insert for a drive pressing jaw according to Fig. 12 , Fig. 14a-b pulling insert for a drive press jaw according to Fig. 12 and Fig. 15 an embodiment of a system for pressing fittings with pipes.

[0095] In the following description of the various embodiments according to the invention, components and elements with the same function and the same mode of operation are provided with the same reference numerals, even if the components and elements in the various embodiments may have differences in their dimensions or shape.

[0096] In the following, exemplary embodiments of a system according to the invention for pressing fittings onto pipes are first explained using schematic representations. Subsequently, details of the pressing jaws, drive pressing jaws, pressing inserts, and pulling inserts according to the invention are discussed using various exemplary embodiments.

[0097] The Fig. 1a bis 1f show, using schematic representations, various embodiments of a system according to the invention for pressing fittings with pipes.

[0098] In the Fig. 1a bis 1d a pressing jaw comprising a drive pressing jaw and a pressing insert is shown schematically, with rotatable and fixed axes being indicated in order to illustrate the functioning of the interaction between the drive pressing jaw and the pressing insert.

[0099] In addition, Fig. 1d the angle α of the contact surfaces to each other is specified and the force effect of the force resultant during pressing is shown by means of a force diagram.

[0100] In the Fig. 1e und 1f another pressing insert is shown and a pulling jaw is shown schematically to illustrate the functionality of the pulling jaw in interaction with the pressing insert.

[0101] Fig. 1a shows a first exemplary embodiment of a system 100 according to the invention for pressing fittings with pipes, comprising a pressing jaw 2 having a pressing insert 10 with two pressing segments 12a, 12b, wherein a pressing contour 14 is formed in the pressing segments 12a, 12b, and further comprising a drive pressing jaw 30 with two drive pressing jaw halves 32a, 32b and joint elements 36. The pressing insert 10 has coupling means 18a, 18b, via which the pressing insert 10 is detachably connected to the drive pressing jaw 30. Furthermore, the pressing insert 10 has joint means 16 for connecting the pressing segments 12a, 12b, wherein the joint means 16 also pivotally connect the pressing insert 10 to the drive pressing jaw 30.

[0102] Furthermore, the pressing insert 10 has force transmission means 22, and the drive pressing jaw 30 has force transmission elements 42a, 42b (schematically shown), which in this case are arranged entirely in an area between the center of the pressing contour 14 and the articulation means 16. In the present view, the pressing jaw 2 is aligned horizontally with the drive pressing jaw 30, and the drive of the pressing tool runs horizontally. Only two rollers 31a, 31b of a double roller ram are shown, which engage and interact with the inlet contours 30a, 30b. When the rollers 31a, 31b are advanced, in Fig. 1a To the left, the drive pressing jaw halves 32a, 32b are pushed apart, so that the force transmission elements 42a, 42b and thus the pressing segments 12a, 12b are pressed together. This results in the pressing of a fitting.

[0103] The axis of the pressing contour 14 is perpendicular to the side view and perpendicular to the paper plane, with the center of the pressing contour 14 in this case corresponding to the axis of the pressing contour 14 and thus to the axis of the pipe to be connected (not shown). The alignment of the axis of the joint means 16 of the pressing insert 10 is also perpendicular to the horizontal alignment of the pressing jaw 2 and perpendicular to the paper plane.

[0104] The area between the center of the pressing contour 14 and the articulation means 16 then corresponds to the space between a plane extending in the plane of the drawing perpendicular to the axis of the pressing contour 14 and perpendicular to the horizontal direction and a plane extending in the plane of the drawing perpendicular to the axis of the articulation means 16 and perpendicular to the horizontal direction. By means of the coupling means 18a, 18b of the pressing insert 10, which are coupled to the coupling elements 42a, 42b of the drive pressing jaw 30 and are designed here as contact surfaces 22a, 22b, the pressing insert 10 is actuated by a movement of the drive pressing jaw 30. By pressing the drive pressing jaw halves 32a, 32b together, the pressing insert 10 can be opened, wherein the movement of the drive pressing jaw halves 32a, 32b is limited by the collision of the opposite ends of the drive pressing jaw halves 32a, 32b (schematically shown) mounted by means of the joint elements 36.

[0105] In the Fig. 1a In the illustrated embodiment of the pressing jaw 2, the pressing insert 10 and the drive pressing jaw halves 32a, 32b are arranged to pivot about the same axis 4a. The two pressing segments 12a, 12b of the pressing insert 10 and the two drive pressing jaw halves 32a, 32b of the drive pressing jaw 30 rotate about the same axis 4a; the joint means 16 and the joint elements 36 are thus arranged to rotate and pivot on the same axis 4a.

[0106] In Fig. 1b A configuration of a pressing jaw 102 is shown, in which the pressing insert 10 and the drive pressing jaw halves 132a, 132b of the drive pressing jaw 130 are arranged to be pivotable about different axes 4b, 6a, wherein the drive pressing jaw halves 132a, 132b have the same axis 6a. Thus, a configuration of the pressing jaw 102 with two axes 4b, 6a is specified.

[0107] In Fig. 1c 1 shows an embodiment of a pressing jaw 202 in which the pressing insert 10 and the drive pressing jaw halves 232a, 232b are arranged pivotably about different axes 4b, 6b, 6c, wherein the drive pressing jaw halves have different axes 6b, 6c. Thus, an embodiment of the pressing jaw 202 with three axes 4b, 6b, 6c is specified.

[0108] Fig. 1d shows a pressing insert 10, wherein the force transmission from a drive pressing jaw (not shown) to the pressing insert 10 is shown by two arrows 8a, 8b. This force introduction 8a, 8b runs at an angle to each other and both arrows 8a, 8b are in Fig. 1d in a force parallelogram divided into the horizontal components 8a h , 8b h and the vertical components 8a v , 8b v .

[0109] The force generated by the force transmission means 22a, 22b and the force transmission elements (not shown) of the drive press jaw and compressing the press insert 10 is formed by the two vertical components 8a v , 8b v . The two horizontal components 8a h , 8b h result in a force 8c, which is directed from the position of the articulation means 16 in the direction away from the schematically illustrated mounting of the press insert 10.

[0110] The resulting force 8c, as a linear force component, is balanced by the mounting of the pressing insert 10 relative to a drive pressing jaw (not shown). Thus, the vertical force components 8a v , 8b v directed toward each other remain.

[0111] The force transmission means 22, which are configured here as flat contact surfaces 22a, 22b, form an angle α relative to one another, wherein the angle α is measured between two planes 26a, 26b associated with the contact surfaces 22a, 22b. An angle α of 0° means that the contact surfaces 22a, 22b are arranged parallel to one another. In the present case, an angle α of greater than 80° is shown.

[0112] The Fig. 1e und 1f now show further elements of the system for pressing fittings with pipes with a pressing insert 110 having two pressing segments 112a, 112b, wherein a pressing contour 114 is formed in the pressing segments 112a, 112b and wherein the pressing segments 112a, 112b are connected to one another via joint means 116. The pressing insert 110 further has attachment means 128a, 128b, 128c, 128d (hereinafter also 128) for a pulling jaw 60, so that by means of the pulling means 74a, 74b of the pulling jaw 60 (shown only schematically), a fitting can be pressed by compressing the pressing insert 110. In Fig. 1e und 1f Two possibilities of such pressing are shown, in which the pressing insert 110 is used as a pressing loop. The pressing insert 110 is not mounted or otherwise connected to the drive pressing jaw, as in the Fig. 1a bis 1d is shown.

[0113] First, Fig. 1e a pressing insert 110 with attachment means 128 in the form of recesses 128a, 128b, which are arranged on the outside of the pressing segments 112a, 112b in front of the center of the pressing insert 110 as viewed from the articulation means 116.

[0114] Fig. 1f shows a pressing insert 110 with attachment means 128 in the form of recesses 128c, 128d, which are arranged on the outside of the pressing segments 112a, 112b, behind the center of the pressing insert 110, as viewed from the hinge means 116. Thus, in this case, the attachment means 128 are arranged where the pressing insert 110 can be opened to be positioned on a fitting prior to pressing. The opened section is then compressed by the tension jaw 60, and the fitting is pressed.

[0115] The attachment means 128a, 128b can also be designed as coupling means that interact with the coupling elements of a drive pressing jaw. In this case, the attachment means 128a, 128b serve both to transmit force when using a pressing insert 110 in its function as a pressing jaw insert and when used in its function as a pressing sling.

[0116] The Fig. 2a bis 2c show a first embodiment of a pressing jaw 2 with a pressing insert 10 and a drive pressing jaw 30, in particular for a system according to Fig. 1a and Fig. 1d . Fig. 2a first shows the pressing jaw 2 in a perspective side view, Fig. 2b shows the pressing jaw 2 in a side sectional view in closed state and Fig. 2c in a side sectional view in the open state.

[0117] The pressing jaw 2 has a pressing insert 10 and a drive pressing jaw 30 with joint elements 36 in the form of two hollow bolts 46a, 46b, which pivot the two drive pressing jaw halves 32a, 32b about the common axis 4a. The hollow bolts 46a, 46b are also Fig. 4a und 4b can be seen. Retaining tabs 50a, 50b are provided for holding and connecting the drive pressing jaw halves 32a, 32b. A drive mechanism 54, in this case designed as a double roller tappet with two rollers 56a, 56b, is connected to the retaining tabs 50a, 50b, wherein the drive mechanism 54 forms an operative connection with a pressing tool (not shown). The rollers 56a, 56b interact with an inlet contour (not shown) of the drive pressing jaw halves 32a, 32b, as described above.

[0118] During pressing, the fitting to be pressed (not shown) is received by the pressing segments 12a, 12b or the pressing contour 14 of the pressing insert 10 and at least partially deformed, whereby the deformation is influenced by the design of the pressing contour 14. The two pressing segments 12a, 12b are connected to one another via hinge means 16, wherein in this case the hinge means 16 is designed as a hollow bolt 44 supporting both pressing segments 12a, 12b. An elastic spring 48 serves to close the pressing segments 12a, 12b.

[0119] The pressing insert 10 is coupled to the drive pressing jaw 30 by means of interlocking coupling means 18 in the form of coupling pins 18a, 18b with head ends 24a, 24b and coupling elements 38 in the form of partially open T-grooves 38a, 38b. When coupled, the coupling pins 18a, 18b engage in the undercuts formed by the T-grooves 38a, 38b. The force transmission elements 42 of the drive pressing jaw 30 are designed as contact surfaces 42a, 42b, which bear against the force transmission means 22 of the pressing insert 10, designed as contact surfaces 22a, 22b. When pressing a fitting, the press insert 10 is compressed by transmitting the force generated by the pressing tool to the press insert 10 via the force transmission elements 42 and the force transmission means 22.

[0120] Likewise, the contact surfaces 42a, 42b have an angle α relative to each other, wherein the angle α is measured between two planes 45a, 45b associated with the contact surfaces 42a, 42b. In the present case, an angle α of greater than 80° is shown. Fig. 2b In the closed state of the drive pressing jaw 30 with coupled pressing insert 10 shown, it can be seen that the angle between the contact surfaces 22a, 22b corresponds to the angle between the contact surfaces 42a, 42b.

[0121] Due to the matching axes of rotation, the force transmission means advantageously do not slide on the force transmission elements during pressing, so that friction losses are minimized or even avoided during the power transmission from the drive pressing jaw 30 to the pressing insert 10. By eliminating the sliding movement, the T-grooves 38a, 38b serving as coupling elements 38 can be designed shorter compared to the shapes of T-grooves serving as coupling elements in pressing jaws, in which the force transmission means slide on the force transmission elements during pressing, so that the coupling process of the pressing insert 10 to the drive pressing jaw 30 is simplified.

[0122] In this embodiment, the pressing insert 10 and the drive pressing jaw 30 of the pressing jaw 2 are pivotable about a common pivot axis 4a. For this purpose, a hollow pin 44 supporting both pressing segments 12a, 12b of the pressing insert 10 is arranged between the two hollow pins 46a, 46b supporting the drive pressing jaw halves 32a, 32b of the drive pressing jaw 30.

[0123] Locking bolt 50 is also arranged in the hollow bolts 44, 46a, 46b as a common pivot axis 4a. The locking bolt 50 thus serves to pivotally connect the pressing insert 10 to the drive pressing jaw 30 and also pivotably supports the drive pressing jaw halves 32a, 32b. The connecting elements 52, which pivotally connect the pressing insert to the drive pressing jaw 30, are thus designed in this case as hollow bolts 44, 46a, 46b and locking bolt 50.

[0124] Furthermore, the pressing insert 10 has attachment means 28 in the form of rotationally symmetrical recesses 28a, 28b, into which the pulling means of a pulling jaw 60 (see schematically in Fig. 1e und 1f ) can engage. The pressing insert 10 can thus also be used as a pressing collar. This enables the pressing of fittings in hard-to-reach areas of the installation, for example in room corners. This results in the advantageous design of the suitability of the pressing insert 10 both in conjunction with a drive pressing jaw 30 as a pressing jaw insert and also as a pressing collar in conjunction with a pulling jaw 60, as is used in connection with Fig. 1e und 1f has been shown.

[0125] In the Fig. 3a und 3b the pressing jaw is Fig. 2a-c during the coupling process of the pressing insert 10 with the drive pressing jaw 30 in a lateral sectional view ( Fig. 3a ) and in a perspective view ( Fig. 3b ). First, the pressing insert 10 is inserted in a slightly pivoted position into the drive pressing jaw 30 so that the head ends 24a, 24b of the coupling pins 18a, 18b engage in the openings of the T-slots 38a, 38b ( Fig. 3a ). By rotating the pressing insert 10 back into the position of the drive pressing jaw 30 (shown horizontally here), the coupling pins 18a, 18b engage the undercut of the T-slots 38a, 38b. If the opening of the hollow bolt 44 is congruent with the openings of the hollow bolts 46a, 46b of the drive pressing jaw 30, the locking bolt 50 can be inserted.

[0126] In Fig. 4a und 4b is a drive pressing jaw 30 of a pressing jaw 2 according to Fig. 2 shown in a perspective view and in a side view. The locking bolt 50 arranged as a common pivot axis 4a (shown in Fig. 2 and Fig. 3 ) is held by the hollow bolts 46a, 46b of the drive press jaw halves 32a, 32b as well as by the retaining tabs 50a, 50b (see Fig. 2 ) enclosed.

[0127] The drive pressing jaw halves 32a, 32b each have undercut recesses in the form of a partially open T-slot 38a, 38b as coupling elements 38. The head ends 24a, 24b of the coupling pins 18a, 18b of the pressing insert 10, which have a larger radius than the radius of the pin section, can engage behind the undercuts, so that, in the connected state, there is mechanical play between the coupling pins 18a, 18b and the T-slots 38a, 38b. This allows for easy displacement of the pressing insert 10 and the drive pressing jaw 30 relative to one another during pressing. The force transmission elements 42 are designed as flat contact surfaces 42a, 42b.

[0128] Fig. 5a bis 5d show a pressing insert 10 of a pressing jaw according to Fig. 2 , where Fig. 5c a sectional view through the Fig. 5b the section axis Vc is shown and where in Fig. 5d which in Fig. 5b by the plan view from the direction Vd of the side of the pressing insert 10 having the articulation means 16.

[0129] In the Fig. 5a und 5b The view shown clearly shows the force transmission means 22 of the pressing insert 10, which are designed as contact surfaces 22a, 22b. Through these contact surfaces 22a, 22b and through the force transmission elements 42 of the drive pressing jaw 30, which are also designed as contact surfaces 42a, 42b, Fig. 4 This enables a flat force transmission independent of the coupling. Furthermore, the design as partially open T-slots 38a, 38b enables particularly smooth insertion of the pressing insert 10 into the drive pressing jaw 30, thus simplifying handling of the pressing tool.

[0130] Based on the Fig. 5c und 5d The illustration shows the spring 48, which tensions the pressing segments 12a, 12b of the pressing insert 10 against each other and thus serves to close the pressing insert 10. Retaining rings 43a, 43b are provided for axially securing the hollow bolt 44.

[0131] Fig. 6a bis 6d show a first embodiment of a traction insert 72, in particular for a system according to Fig. 1e und Fig. 1f , where Fig. 6c a sectional view through the Fig. 6b The section axis VIc is shown and where in Fig. 6d which in Fig. 6b by the plan view from direction VId of the side of the tension insert 70 having the joint means 76. The joint means 76 serve to connect the tension insert halves 72a, 72b. Furthermore, coupling means 78, here in the form of coupling pins 78a, 78b with head ends 84a, 84b for coupling the tension insert 70 with a drive press jaw 30 (not shown in Fig. 6 ). Thus, the pulling insert 70 and the drive pressing jaw 30 act together as a pulling jaw 60, as shown in Fig. 1e und 1f is shown schematically. Force transmission means 82, here in the form of contact surfaces 82a, 82b, are also provided on the outside of the tension insert halves 72a, 72b. The tension insert halves 72a, 72b each have tension means 74a, 74b opposite the joint means 76, which are inserted into the attachment means 28 of a (not shown) Fig. 6 shown) pressing insert 10. The pulling insert 70 and the drive pressing jaw 30 thus act as a pulling jaw 60 (see schematic Fig. 1e und 1f ) together and press the press insert 10 radially inward. In this case, the press insert 10 serves as a press loop, simplifying the pressing of fittings in hard-to-reach or spatially restricted work areas.

[0132] The force transmission means 82 of the pulling insert 70, designed as contact surfaces 82a, 82b, together with force transmission elements of a drive pressing jaw (not shown), also designed as flat contact surfaces, enable a flat force transmission that is independent of the coupling of the pulling insert 70 to the drive pressing jaw 30. The coupling of the pulling insert 70 to the drive pressing jaw 30 can be carried out analogously to the coupling of a pressing insert 10 to a drive pressing jaw 30.

[0133] The hinge means 76 are designed as a hollow pin 94, which pivotally supports the two tension insert halves 72a, 72b. A spring 88 serves to close the tension insert 70 by biasing the two tension insert halves 72a, 72b against each other. Retaining rings 73a, 73b are provided to axially secure the hollow pin 94.

[0134] In Fig. 7a bis 7c is a second embodiment of a pressing jaw 202 with a pressing insert 210 and a drive pressing jaw 230 with two drive pressing jaw halves 232a, 232b, in particular for a system according to Fig. 1c , shown in closed position. Fig. 7a shows a perspective view of the pressing jaw 202, whereas Fig. 7b a side view and Fig. 7c shows a lateral sectional view.

[0135] In contrast to the Fig. 2 In the embodiment shown, the pressing jaw 202 has different axes of rotation 4b, 6b, 6c for the pressing insert 210 and the drive pressing jaw halves 232a, 232b, wherein the drive pressing jaw halves 232a, 232b have different axes 6b, 6c. This results in three axes of rotation 4a, 6b, 6c for this embodiment. The connection of the drive pressing jaw halves 232a, 232b and the pressing insert 210 is effected by means of a side plate 276 serving as a connecting element 252, wherein the further bearing eye 296 of the side plate 276, shown empty here, serves for connection to a pressing tool (not shown).

[0136] By providing different axes around which the pressing insert 210 and the drive pressing jaw halves 232a, 232b are rotatably mounted, the overall thickness of the pressing jaw 202 can be reduced and the overall design simplified. Due to the simpler design, the production of the drive pressing jaw 230 is less complex and thus more cost-effective.

[0137] In this embodiment of a pressing jaw 202, the pressing insert 210 also has pressing segments 212a, 212b or a pressing contour 214 for receiving the fitting to be pressed. The two pressing segments 212a, 212b are connected to one another via hinge means 216, wherein the hinge means 216 are designed as a hollow bolt 244 supporting both pressing segments 212a, 212b and axially secured by a spring 248. The spring 248 engages with at least half the wire thickness in the central groove 245 of the hollow bolt 244, as shown in the enlarged section of Fig. 11c shown and explained below.

[0138] In this way, the joint of the pressing insert 210 can be designed to be narrow, in particular narrower than in a comparable securing device using retaining rings as in the previously described embodiments of a pressing insert 10 according to Fig. 5 Due to the resulting narrow width of the joint, the gap between the drive press jaw halves, in which the press insert 210 is held, is also correspondingly narrow. Overall, the entire construction can be designed to be more space-saving, simplifying work in hard-to-reach, narrow spaces.

[0139] The spring 248 additionally tensions the two pressing segments 212a, 212b against each other. Furthermore, the pressing insert 210 has rotationally symmetrical recesses 228a, 228b as attachment means, by means of which the pressing insert 210 in conjunction with a pulling jaw 60 (see schematically in Fig. 1e und 1f ) can be used as a pressing sling. A locking bolt 250 secures the pivotable mounting of the pressing insert 210 on the hollow bolt and simultaneously serves to secure the connection to the drive pressing jaw 230 via the side plate 276. The drive pressing jaw halves 232a, 232b are connected to the side plate 276 by means of locking bolts 262, 264 and are pivotally mounted.

[0140] The pressing insert 210 also has coupling means 218 in the form of coupling pins 218a, 218b with head ends 224a, 224b, and the drive pressing jaw 230 has coupling elements 238 in the form of partially open T-slots 238a, 238b. The force transmission elements 242 of the drive pressing jaw 230 are designed as contact surfaces 242a, 242b, which bear against the force transmission means 222 of the pressing insert 210, designed as contact surfaces 222a, 222b. When pressing a fitting, the pressing insert 210 is compressed by transmitting the force generated by the pressing tool (not shown) to the pressing insert 210 via the force transmission elements 242 and the force transmission means 222.In the present case, the shape of the pressing insert 210 differs from the previously described pressing inserts 10, 110 in that the sections of the outer side of the pressing segments 212a, 212b, which lie between the coupling means 218, are designed to be round, so that these sections of the pressing segments 212a, 212b lie on the radius of a common circle in the closed state of the pressing insert 210.

[0141] In Fig. 8a bis 8c the pressing jaw 202 is Fig. 7 shown in the open state, where Fig. 8a a perspective view, Fig. 8b a side view and Fig. 8c shows a side sectional view. Opening the pressing jaw 202 and thus the pressing insert 210, so that a fitting to be pressed can be enclosed with the pressing insert 210, is achieved by pressing together the rear ends (facing away from the pressing insert 210) of the drive pressing jaw halves 232a, 232b.

[0142] Fig.9a und 9b now show, in conjunction with the Fig. 10a und 10b the pressing jaw 202 after Fig. 7a bis 7c during the coupling process of the pressing insert 210 with the drive pressing jaw 230. In Fig. 10a und 10b the drive press jaw 230 is Fig. 7a bis 7c shown without the pressing insert 210 inserted in a perspective view and in a side view.

[0143] The joint elements 236 connect the drive press jaw halves 232a, 232b and enable pivoting of the drive press jaw halves 232a, 232b about different axes 6b, 6c.

[0144] The rounded sections of the pressing segments 212a, 212b between the coupling means 218 of the pressing insert 210 enable the pivoting movement of the pressing insert 210 for coupling the coupling means 218 into the coupling elements 238 to take place on a circular path without first pivoting the pressing insert 210 from the horizontal position of the drive pressing jaw 230. Such handling is easier for a user to implement, thus improving the coupling of the pressing insert 210 into the drive pressing jaw 230.

[0145] If the opening of the hollow bolt 244 of the pressing insert 210 is congruent with the bearing eye 300 of the side plate 276 ( Fig. 10a und 10b ), the locking bolt 250, which represents the pivot axis 4b of the pressing insert 210, can be inserted to secure the connection between the pressing insert 210 and the drive pressing jaw 230. According to Fig. 10a und Fig. 10b The drive pressing jaw 230 has coupling elements 238 in the form of partially open T-slots 238a, 238b with undercuts, and further has force transmission elements 242 in the form of contact surfaces 242a, 242b. In the present case, the T-slots 238a, 238b are longer than the T-slots 38a, 38b to ensure coupling of the pressing insert 210 during the entire opening movement of the drive pressing jaw 230.

[0146] Fig. 11a-d shows the pressing insert 210 of the pressing jaw after Fig. 7 , where Fig. 11c a sectional view through the Fig. 11b The section axis XIc is shown and where in Fig. 11d which in Fig. 11b by the plan view from the direction XId of the side of the pressing insert 210 having the articulation means 216.

[0147] In the Fig. 11a perspective view shown and the one in Fig. 11b The sectional view shown clearly shows the force transmission means 222 of the pressing insert 210, designed as contact surfaces 222a, 222b. These contact surfaces 222a, 222b and the force transmission elements 242 of the drive pressing jaw 230, also designed as contact surfaces 242a, 242b, enable a flat force transmission independent of the coupling of the pressing insert 210 to the drive pressing jaw 230. During force transmission, the outer side of the pressing segments 212a, 212b slides along the contact surfaces 242a, 242b and, by coupling force into the pressing insert 210, causes the fitting to be pressed onto a pipe to be pressed.

[0148] A plane 226a, 226b can be assigned to the force transmission means 222, which are designed as contact surfaces 222a, 222b, so that an angle α between the planes 226a, 226b can be defined. In the present case, an angle α of greater than 25° (measured using the planes 227a, 227b running parallel to the planes 226a, 226b) is shown.

[0149] Based on the Fig. 11c und 11d The illustration shows the spring 248 which axially secures the hollow bolt 244.

[0150] In Fig. 12a und 12b and Fig. 13a und 13b is a third embodiment of a pressing jaw 302 comprising a drive pressing jaw 330 ( Fig. 12 ) and a press set 310 ( Fig. 13a und 13b ) is shown.

[0151] Fig. 12a und 12b show a third embodiment of a drive pressing jaw 330, which has two drive pressing jaw halves 332a, 332b, which in this case are pivotably mounted about a common axis 4a. Furthermore, the drive pressing jaw 330 has coupling elements 338 in the form of coupling pins 338a, 338b for releasably connecting to corresponding coupling means 318 of a pressing insert 310. The tabs 350a, 350b, 351a, 351b of the drive pressing jaw 330 have circular openings for receiving joint means, for example hollow bolts and a locking bolt, for releasably connecting the drive pressing jaw 330 to the

[0152] Press insert 310. In this case, the press insert 310 is mounted about the same pivotable axis 4a as the drive press jaw 330.

[0153] In Fig. 13a und 13b The pressing insert 310 is now shown with two pressing segments 312a, 312b, in which a pressing contour 314 is formed. Furthermore, attachment means 328 in the form of rotationally symmetrical recesses 328a, 328b are shown, into which the pulling means 74a, 74b of a pulling jaw 60 engage, as well as joint means 316 in the form of a hollow bolt 344, wherein the hollow bolt 344 pivotably supports the pressing insert 310 about the axis 4a common to the drive pressing jaw 330.

[0154] The pressing insert 310 further comprises coupling means 318 for releasably receiving the coupling elements 338 of the drive pressing jaw 330 in the form of recesses 318a, 318b. The recesses 318a, 318b are configured such that the protruding coupling pins 338a, 338b engage in the recesses 318a, 318b during the coupling process of the pressing insert 310 with the drive pressing jaw 330.

[0155] The coupling pins 338a, 338 are provided for this purpose on two opposite inner sides of the drive pressing jaw halves 332a, 332b of the drive pressing jaw 330. The recesses 318a, 318b serving as coupling means 318 are formed at two opposite locations on the outer sides of the pressing segments 312a, 312b of the pressing insert 310. The recesses 318a, 318b are completely in an area between the center of the pressing contour 314 of the pressing insert 310 and the joint means 316 of the pressing insert 310 and in a direction perpendicular to the horizontally aligned drive pressing jaw 330 with connected pressing insert 310 (see Fig. 15 ) arranged above and below the hinge means 316 of the pressing insert 310.

[0156] Such a design of the recesses 318a, 318b results in a projection 319a, 319b in each recess 318a, 318b, which the coupling pins 338a, 338b engage behind during the coupling process of the pressing insert 310 with the drive pressing jaw 330, the coupling pins 338a, 338b rest against the projection 319a, 319b and fit positively into the grooves formed by the recesses 318a, 318b.

[0157] The coupling process and the power transmission between the drive pressing jaw 330 and the pressing insert 310 is analogous to that already described with reference to the Fig. 2 bis 4illustrated first embodiment of a pressing jaw 2 with drive pressing jaw 30 and pressing insert 10. For example, the force transmission elements 342 of the drive pressing jaw 330 and the force transmission means 322 of the pressing insert 310 can be designed as contact surfaces. The joint means of the drive pressing jaw 330 can also be designed in the form of hollow bolts. Thus, a locking bolt can be pushed through both the hollow bolts of the drive pressing jaw 330 and the hollow bolt 344 of the pressing insert 310 after the coupling process. The locking bolt thereby secures the connection between the drive pressing jaw 330 and the pressing insert 310 and forms the common pivot axis 4a of the drive pressing jaw 330 and the pressing insert 310.

[0158] Fig. 14a und 14b show an embodiment of a pulling insert 370, in particular for connection to a drive pressing jaw 330 according to Fig. 12 The joint means 376 serve to connect the tension insert halves 372a, 372b. Furthermore, coupling means 378 are provided for releasably connecting them to the drive pressing jaw 330, here in the form of recesses 378a, 378b. The coupling means 378 engage with the coupling elements 338 of the drive pressing jaw 330, designed as coupling pins 338a, 338b, by engaging behind the coupling pins 338a, 338b.

[0159] The tension insert halves 372a, 372b each have tension means 374a, 374b arranged opposite the articulation means 376. By means of the tension means 374a, 374b, which are integrated into the attachment means 28, 128, 228, 328 of a (not shown) Fig. 14 shown) pressing insert 10, 110, 210, 310, and a drive pressing jaw 330 according to Fig. 12 The pressing insert 10, 110, 210, 310 can be pressed. In this case, the pressing insert 10, 110, 210, 310 serves as a pressing loop and the pressing of fittings in hard-to-reach or spatially limited work areas is simplified. In this way, the coupling elements 338 of the drive pressing jaw 330 are designed for detachable connection, on the one hand, with a pulling insert 370 as pulling jaw 60 (as shown schematically in Fig. 1e und 1f shown) and, on the other hand, with a pressing insert 310, as a pressing jaw 302. This reduces the number of tools that must be kept on site for pressing fittings onto pipes and simplifies the pressing process.

[0160] The force is transmitted from the drive pressing jaw 330 to the pulling insert 370, analogous to the preceding embodiments of the pressing jaws 2, 102, 202, 302, by means of force transmission elements 342 of the drive pressing jaw 330 and force transmission means 382 of the pulling insert 370. The joint means 376 of the pulling insert 370 are designed as a hollow pin 394, which pivotally mounts the two pulling insert halves 372a, 372b about a common pivot axis 4a. The pivot axis 4a is a pivot axis 4a common to the drive pressing jaw halves 332a, 332b, so that the joint means 376 of the pulling insert and the joint means of the drive pressing jaw are pivotally mounted on the same axis.

[0161] Fig. 15 shows an embodiment of a system 400 for pressing fittings with pipes, wherein the system 400 comprises a pulling insert 370 according to Fig. 14 , a first pressing operation 310 after Fig. 13 , a second pressing insert 410, a third pressing insert 510 and a drive pressing jaw 330 according to Fig. 12 and further comprises a pressing tool 404. The pressing inserts 310, 410, 510 each have different pressing contours 314, 414, 514, in particular for different pressing dimensions, for example with external dimensions of 12, 18, and 35 mm.

[0162] The pressing tool 404 is detachably connected to the drive pressing jaw 330 by means of a locking bolt 450. Advantageously, the drive pressing jaw 330 can be detachably connected to one of the pressing inserts 310, 410, 510 or to the pulling insert 370 by means of the coupling elements 338, so that both a pressing jaw and a pulling jaw can be provided by means of the same drive pressing jaw 330. In the present case, a pressing insert 410 is detachably connected to the drive pressing jaw 330, so that fittings can be pressed onto pipes using the pressing insert 410 and a force generated by the pressing tool 404 and transmitted to the pressing insert 410 by the drive pressing jaw 330.

Claims

1. Press jaw (2, 102, 202, 302) for pressing fittings with pipes, - with a press insert (10, 110, 210, 310, 410, 510) and - with a drive press jaw (30, 130, 230, 330), - wherein the press insert includes (10, 110, 210, 310, 410, 510): - at least two press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b), - a press contour (14, 114, 214, 314, 414, 514) formed in the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b), - joint means (16, 116, 216, 250, 316) for connecting the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b), - coupling means (18, 218, 318) for releasably connecting with the drive press jaw (30, 130, 230, 330); and - power transmission means (22, 222, 322), - wherein the drive press jaw (30, 130, 230, 330) has: - two drive press jaw halves (32a, 32b, 132a, 132b, 232a, 232b, 332a, 332b), - joint elements (36, 236) for connecting the drive press jaw halves (32a, 32b, 132a, 132b, 232a, 232b, 332a, 332b), - coupling elements (38, 238, 338) for releasably connecting with the press insert (10, 110, 210, 310, 410, 510) and - force transmission elements (42, 242, 342), characterised in - that the joint means (16, 116, 216, 250, 316) pivotably connect the press insert (10, 110, 210, 310, 410, 510) to the drive press jaw (30, 130, 230, 330), and - that the force transmission means (22, 222, 322) and the force transmission elements (42, 242, 342) are arranged at least predominantly, preferably completely, in an area between the center of the press contour (14, 114, 214) and the joint means (16, 116, 216, 250, 316).

2. Press jaw (2, 302) according to claim 1, characterized in, - that the force transmission means (22, 222, 322) are formed as contact surfaces (22a, 22b, 222a, 222b), - that the force transmission elements (42, 242, 342) are formed as contact surfaces (42a, 42b, 242a, 242b), and - that the contact surfaces (22a, 22b, 222a, 222b) in pairs have an angle (α) greater than 10°, preferably greater than 25°, in particular greater than 40°, particularly preferably greater than 80° to one another.

3. Press jaw (2, 302) according to claim 1 or 2, characterized in, that the press insert (10, 110, 310, 410, 510) and the drive press jaw halves (32a, 32b, 332a, 332b) are pivotable about a same axis (4a).

4. Press jaw (102, 202) according to any one of claims 1 to 3, characterized in, that the press insert (10, 210) and the drive press jaw halves (132a, 132b, 232a, 232b) are pivotable about different axes (4b, 6a, 6b, 6c), wherein the drive press jaw halves (132a, 132b, 232a, 232b) having an identical axis (6a) or different axes (6b, 6c).

5. Press jaw (2, 102, 202) according to any one of claims 1 to 4, characterized in, - that the coupling means (18, 218) include coupling pins (18a, 18b, 218a, 218b) having head ends (24a, 24b, 224a, 224b), and - that the coupling elements (38, 238) have partially opened T-grooves (38a, 38b, 238a, 238b) and receive the coupling means (18, 218).

6. Press jaw (302) according to any one of claims 1 to 4, characterized in, - that the coupling elements (338) include coupling pins (338a, 338b) and - that the coupling means (318) include recesses (318a, 318b) and receive the coupling elements (338).

7. Press jaw (2, 102, 202, 302) according to any one of claims 1 to 6, characterized in, that the press insert (10, 110, 210, 310, 410, 510) is formed according to any one of claims 15 to 22.

8. Press jaw (2, 102, 202, 302) according to any one of claims 1 to 7, characterized in, that the drive press jaw (30, 130, 230, 330) is formed according to one of the claims 9 to 14.

9. Drive press jaw (30, 130, 230, 330) for pressing fittings with pipes by means of a press insert (10, 110, 210, 310, 410, 510), - with two drive press jaw halves (32a, 32b, 132a, 132b, 232a, 232b, 332a, 332b), - with joint elements (36, 236) for connecting the drive press jaw halves (32a, 32b, 132a, 132b, 232a, 232b, 332a, 332b), - with coupling elements (38, 238, 338) for releasably connecting with a press insert (10, 110, 210, 310, 410, 510) and - with power transmission elements (42, 242, 342), - wherein the joint elements (36, 236) enable the drive press jaw halves (32a, 32b, 132a, 132b, 232a, 232b, 332a, 332b) to pivot about a common axis (4a, 6a) or about two different axes (6b, 6c), characterised in, - that connecting elements (52, 252) are provided for pivotably connecting the press insert (10, 110, 210, 310, 410, 510), and - that the force transmission elements (42, 242, 342) are arranged at least predominantly, preferably completely, in an area between the center of the press contour (12, 114, 214) of the press insert (10, 110, 210, 310, 410, 510) to be connected and the joint means (16, 116, 216, 250, 316) of the press insert (10, 110, 210, 310, 410, 510) to be connected.

10. Drive press jaw (30, 130, 230, 330) according to claim 9, characterized in, - that the force transmission elements (42, 242, 342) are formed as contact surfaces (42a, 42b, 242a, 242b), and - that the contact surfaces (42a, 42b, 242a, 242b) have an angle (α) greater than 10°, preferably greater than 25°, in particular greater than 40°, particularly preferably greater than 80° to one another.

11. Drive press jaw (30, 330) according to claim 9 or 10, characterized in, that the connecting elements (52) and the joint elements (36) have the same axis (4a) (axis of rotation).

12. Drive press jaw (130, 230) according to any one of claims 9 to 11, characterized in, that the connecting elements (252) and the joint elements (236) have different axes (4b, 6a, 6b, 6c), the joint elements (236) enabling the drive press jaw halves (132a, 132b, 232a, 232b) to pivot about a common axis (6a) or about different axes (6b, 6c).

13. Drive press jaw (30, 130, 230) according to any one of claims 9 to 12, characterized in, - that the coupling elements (38, 238) for releasably receiving coupling means (18, 218) of the press insert (10, 110, 210) have partially opened T-grooves (38a, 38b, 238a, 238b), and - that the force transmitting elements (42, 242, 342) are formed as contact surfaces (42a, 42b, 242a, 242b).

14. Drive press jaw (330) according to any one of claims 9 to 12, characterized in that the coupling elements (338) include coupling pins (338a, 338b).

15. Press insert (10, 110, 210, 310, 410, 510) for pressing fittings with pipes, - with at least two press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b), - with press contours (14, 114, 214) formed in the pressing segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b), - with joint means (16, 116, 216, 250, 316) for connecting the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b), - with coupling means (18, 218, 318) for releasably connecting with a drive press jaw (30, 130, 230, 330) and - with power transmission means (22, 222, 322), characterised in, - that the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b) include attachment means (28, 128, 228, 328) for attaching a pull jaw (60).

16. Press insert (10, 110, 210, 310, 410, 510) according to claim 15, characterized in, that the attachment means (28, 128, 228, 328) in the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b) are formed as recesses (28a, 28b, 128a, 128b, 228a, 228b, 328a, 328b) for receiving pull means (74a, 74b, 374a, 374b) of the pull jaw (60).

17. Press insert (10, 110, 210, 310, 410, 510) according to claim 15 or 16, characterized in, that the recesses (28a, 28b, 128a, 128b, 228a, 228b) enable the pull means (74a, 74b, 374a, 374b) to be applied at at least two, preferably several, different angles in relation to the axis of the pipe to be pressed.

18. Press insert (10, 110, 210, 310, 410, 510) according to any one of claims 15 to 17, characterized in, that the joint means (16, 116, 216, 250, 316) enable the press insert (10, 110, 210) to be pivotably attached to a drive press jaw (30, 130, 230, 330).

19. Press insert (10, 110, 210, 310, 410, 510) according to any one of claims 15 to 18, characterized in, that the force transmission means (22, 222, 322) are formed as contact surfaces (22a, 22b, 222a, 222b).

20. Press insert (10, 110, 210) according to any one of claims 15 to 19, characterized in, - that the coupling means (18, 218) include coupling pins (18a, 18b, 218a, 218b) and - that the coupling pins (18a, 18b, 218a, 218b) are provided with head ends (24a, 24b, 224a, 224b).

21. Press insert (310, 410, 510) according to any one of claims 15 to 19, characterized in, that the coupling means (318) include recesses (318a, 318b) for releasably receiving coupling elements (338) of the drive press jaw (330).

22. Press insert (10, 110, 210, 31, 410, 510) according to any one of claims 15 to 21, characterized in, that an elastic spring (48, 248) is provided for closing the press segments (12a, 12b, 112a, 112b, 212a, 212b).

23. System (100, 400) for crimping fittings with pipes, - with at least two press inserts (10, 110, 210, 310, 410, 510) and - with a drive press jaw (30, 130, 230, 330), - wherein the press inserts have (10, 110, 210, 310, 410, 510): - at least two press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b), - press contours (14, 114, 214, 314, 414, 514) formed in the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b), - joint means (16, 116, 216, 250, 316) for connecting the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b), - coupling means (18, 218, 318) for releasably connecting with the drive press jaw (30, 130, 230, 330); and - power transmission means (22, 222, 322), - wherein the at least two press inserts (10, 110, 210, 310, 410, 510) have different press contours (14, 114, 214, 314, 414, 514) and - wherein the drive press jaw (30, 130, 230, 330) has: - two drive press jaw halves (32a, 32b, 132a, 132b, 232a, 232b, 332a, 332b), - joint elements (36, 236) for connecting the drive press jaw halves (32a, 32b, 132a, 132b, 232a, 232b, 332a, 332b), - coupling elements (38, 238, 338) for detachably connecting with the press insert (10, 110, 210, 310, 410, 510) and - force transmission elements (42, 242, 342), characterised in, - that at least one press insert (10, 110, 210, 310, 410, 510) has attachment means (28, 128, 228, 338) for attaching a pull jaw (60), - that a pull insert (70, 370) is provided and includes: - two pull insert halves (72a, 72b), - joint means (76, 376) for connecting the pull insert halves (72a, 72b, 372a, 372b), - coupling means (78, 378) for releasably connecting with the drive press jaw (30, 130, 230, 330), - power transmission means (82, 382) and - pull means (74a, 74b, 374a, 374b) opposite the joint means (76, 376), - wherein the coupling means (78, 378) and the force transmitting means (82, 382) are arranged on the outside of the pull insert halves (72a, 72b, 372a, 372b), and - that the pull insert (70, 370) and the drive press jaw (30, 130, 230, 330) form the pull jaw (60).

24. System (100, 400) according to claim 23, characterized in, that the pull means (74a, 74b, 374a, 374b) enable to be attached in the attachment means (28, 128, 228, 338) at at least two, preferably several, different angles in relation to the axis of the pipe to be pressed.

25. System (100, 400) according to claim 23 or 24, characterised in, that the drive press jaw (30, 130, 230, 330) is formed according to one of claims 9 to 14 and / or that the press insert (10, 110, 210, 310, 410, 510) is formed according to any one of claims 15 to 22.