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

Abstract

Press insert or press loop (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 press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b) and - with joint elements (16, 116, 216, 250, 316) for connecting the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b), - wherein the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b) have attachment means (28, 128, 228, 328) for attaching a pulling jaw (60), characterized in that - that the joint means (16, 116, 216, 250, 316) are designed as a hollow bolt (244) which centrally supports the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b) and is axially secured by means of a spring (248).

Description

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

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

[0003] The invention also relates to a press insert for crimping fittings to pipes, comprising at least two press segments, press contours formed in the press segments, articulated elements for connecting the press segments, coupling elements for detachable connection to a drive press jaw, and force transmission elements. At least two press segments are used as parts of a press jaw for crimping the fittings.

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

[0005] The relevant technical field for 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 for conveying and guiding a fluid, i.e., a liquid or a gas. A fitting is fundamentally understood to be 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 tees, or crossovers. However, a fitting can also be understood to be a pipe connection of a valve or other component. For example, thermometers or pressure gauges, as valves, only have one connection for a single 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. In this process, a press jaw deforms the press section of a fitting radially inwards with the pipe section inserted, creating a permanent and tight, and potentially even inseparable, connection. The fittings can be equipped with a sealing element, such as an O-ring, to ensure the tightness of the connection, or they can be designed with direct contact between the materials of the pipe section and the fitting, for example, a metal-to-metal seal.

[0007] For radial forming of the press section, predominantly radially acting press systems as well as press systems that use radial-axial pressing are suitable, whereby during the pressing process a part of the fitting is axially displaced in order to effect radial forming.

[0008] The previously described piping systems are primarily used for transporting drinking water or heating water, gas for operating a heating system, or industrial gases. In principle, any fluid medium can be transported in these pipelines.

[0009] Suitable materials for rigid pipes include solid and high-strength materials, particularly metallic materials or hard plastics. Rigid pipes are preferred for installations with longer straight sections along walls or ceilings, or within wall or ceiling structures.

[0010] In contrast, flexible pipes are used in installations, especially plastic pipes, so-called solid plastic pipes, or pipes made of composite materials, so-called multilayer composite pipes, consisting of one or more layers of plastic and one or more thin layers of metal. Flexible pipes are used particularly for the installation of pre-wall systems, such as retrofitted sanitary installations, where, in confined spaces, the flexible pipes are often bent to shape on-site and installed in a curved state.

[0011] Furthermore, rigid and flexible pipes are available in various outside diameters. Metal pipes are typically used with outside diameters ranging from 6 mm to 108 mm and larger, up to approximately 150 mm (6 inches). Plastic pipes usually have outside diameters ranging from 6 mm to 63 mm, although significantly larger diameters are also used.

[0012] Rigid and flexible pipes differ, regardless of material properties and pipe dimensions, in that a rigid pipe can be connected using an externally sealing fitting, while a flexible pipe can only be connected using an internally sealing fitting. Due to its rigidity, the rigid pipe's dimensional stability is sufficient to absorb the forces generated during radial crimping and to ensure the sealing and holding / fixing function in conjunction with the crimped fitting. Flexible pipes, on the other hand, are supported internally by a support sleeve, which is formed onto the sleeve during crimping of the fitting. Fittings for rigid pipes are therefore externally sealing fittings, and fittings for flexible pipes are internally sealing fittings.

[0013] When installing a piping system that uses both rigid and flexible pipes, compatible pipe dimensions for inner and outer diameters are selected. The exact values ​​may only match by chance in pairs, so suitable dimensions are chosen with the best possible match. In combination with the specific fittings for rigid and flexible pipes, there are generally specific fitting geometries and press jaw geometries for each system or dimension.

[0014] Therefore, a construction site requires a variety of press jaws for different pipes and fittings. The effort on the construction site is particularly significant, as multiple press jaws, driven by a single pressing tool, or even different pressing tools, must be kept on hand. This results in a very large product range and the associated production, storage, and logistics, leading to high acquisition costs for the user.

[0015] Various types of press jaws are used. One type is press jaws that each have a single pressing contour. These are also called standard press jaws and, as a set for several pressing contours, are quite heavy.

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

[0017] Furthermore, the individual press dies are generally not connected to each other and can therefore be interchanged, meaning that different press jaws with varying press contours can be coupled and used with the drive press jaw. This results in incorrect press fittings. The press dies can also be lost more easily, causing pairs of press jaws to fall apart. Additionally, the press dies of interchangeable press jaws are usually difficult to grip. Moreover, the press jaws are often mixed up.

[0018] Furthermore, the external dimensions of the drive press jaws 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 restricted, and the overall weight of the press jaw with interchangeable pressing inserts is greater compared to a standard press jaw.

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

[0020] Furthermore, press loops consisting of two or more press segments are known. These are placed around the fitting to be pressed and pressed together by means of a pulling jaw at the open end to crimp the fitting. For this purpose, the press loop has a recess on both press segments, or on the two outer press segments, into which the pulling jaw engages and pulls the press loop into the closed position. This crimps the fitting. Press loops are often used in hard-to-reach areas of the installation, for example, in room corners, when positioning a pressing jaw is difficult or impossible. The pulling jaw can then be operated from a greater distance to the fitting without having to grip the fitting itself.

[0021] The press loops must also be available for all press dimensions, which further increases the effort on a construction site.

[0022] The aim of the present invention is therefore to further reduce the overall weight of a system for pressing fittings with pipes and to enable convenient one-handed changing of the press dies on the drive press jaw. Furthermore, the multiple uses of the press dies are to be achieved in order to expand the functionality of the system and its components.

[0023] Therefore, the present invention is based on the technical problem of further improving the handling and application possibilities of the press jaw, the drive press jaw, the press insert and the system for pressing fittings with pipes.

[0024] The technical problem outlined above is solved by a press insert or press loop according to claim 1, by a press insert according to claim 7, and by a press jaw according to claim 11.

[0025] The technical problem outlined above is further solved according to a first teaching of the invention, in particular by a press jaw for pressing fittings with pipes, comprising a press insert and a drive press jaw, wherein the press insert has: at least two press segments, a press contour formed in the press segments, hinge means for connecting the press segments, coupling means for detachably connecting to the drive press jaw, and force transmission means, wherein the drive press jaw has: two drive press jaw halves, hinge elements for connecting the drive press jaw halves, coupling elements for detachably connecting to the press insert, and force transmission elements, wherein the hinge means pivotably connect the press insert to the drive press jaw, and wherein the force transmission means and the force transmission elements are at least predominantlypreferably are arranged entirely in an area between the center of the press contour and the joint means.

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

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

[0028] In this design of the press jaw, the force is not applied in opposite directions and parallel to the two force transmission elements in the press insert, but rather at an angle to each other. Therefore, the forces do not cancel each other out, resulting in a resultant force as a linear force component.

[0029] The force transmission means and the force transmission elements together generate a force that compresses the press insert and is directed away from the drive press jaw from the position of the joint means. If the force is divided into a vertical component directed towards the center of the press 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 joint means.

[0030] Therefore, the press insert is mounted opposite the drive press jaw to compensate for the force of the resultant force. The drive press jaw thus no longer needs to encompass the press insert to a large extent, resulting in a smaller overall volume, lower weight, and easier handling of the drive press jaw.

[0031] Preferably, the force transmission means and the force transmission elements are each designed as contact surfaces. This achieves a planar force transmission independent of the coupling of the press inserts with the drive jaw halves of the drive press jaw, distributing the contact pressure evenly. Even though the coupling means can also transmit a force due to the mechanical contact, the separation of the coupling elements and the force transmission elements also achieves a largely separate function of coupling and force transmission.

[0032] The contact surfaces preferably have an angle α greater than 10°, preferably greater than 25°, and particularly greater than 40°, to each other in pairs. An angle α greater than 80° has proven to be optimal. 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 endpoints 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, where an angle of 0° indicates planes running parallel to each other.

[0033] If the contact surfaces are preferably flat, a larger area oriented perpendicular to the direction of force transmission from the drive press jaw to the press insert is achieved, thus enabling more efficient force transmission. If the outer surfaces of the press segments and / or the contact surfaces are preferably round, so that the outer surfaces of the two press segments lie at least partially on the radius of a common circle when the press insert is closed, the process of coupling the press insert with the drive press jaw is simplified.

[0034] There are various ways to arrange the axes or axes of rotation of the different elements of the press jaw. In a preferred embodiment of the press jaw, the press insert and the drive press jaw halves are arranged to pivot about the same axis. Thus, both the two press segments of the press insert and the two drive press jaw halves rotate about the same axis; the pivot points and the joint elements are therefore arranged to rotate and pivot on the same axis. With this design of the press jaw, when the drive press jaws rotate, the press segments of the press insert are driven into a pivoting movement about the same axis, so that the contact surfaces of the drive press jaw and the press segment do not shift relative to 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 allows for a design with two or three axes, the positions of which relative to each other can be optimized with regard to geometric and / or force-related properties.

[0036] For this design of the press jaw, it is further preferred that the joint means be designed as a hollow bolt supporting two press segments. The two press segments are arranged on the hollow bolt and slide along its surface during rotation. The hollow bolt design allows the use of a locking bolt for the drive press jaw by inserting and positioning the locking bolt within the hollow bolt.

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

[0038] Preferably, the joint elements of the drive press jaw have two hollow pins, each hollow pin being connected to a retaining tab on both sides and pivoting the drive press jaw halves about the common axis. The hollow pins each receive the tabs of the drive press jaw halves on one side. Additionally, the hollow pins can be spaced apart from each other in the area between the retaining tabs, so that the hollow pin of the press insert can be positioned in the space between the two hollow pins of the drive press jaw.

[0039] Thus, both the press segments of the press insert and the drive jaw halves of the drive press jaw are arranged on a common axis. Since both parts rotate around the same axis, the pressing process can be carried out with force transmission via planar force transmission means and force transmission elements without sliding of the surfaces and therefore without friction losses.

[0040] In a further preferred embodiment, the hollow bolt supporting each of the two press segments of the press insert is arranged between the two hollow bolts supporting the drive jaw halves of the drive press jaw. A locking bolt is also preferably arranged in the hollow bolts as a common pivot axis. When the drive jaw halves of the drive press jaw are driven into a pivoting movement by a pressing device, they transmit the pressing force to the press segments of the press insert, with the pivoting about the same common axis being carried out effectively and without frictional losses by means of force transmission surfaces sliding against each other.

[0041] The hollow bolts of the drive jaw halves can be attached either to the retaining tabs in the jaw receptacle or within the drive jaw halves themselves. In the latter case, the hollow bolts are replaceable within the drive jaw.

[0042] Thus, the actuation behavior of the coupled arrangement of the press jaw is identical to that of a standard press jaw. The synchronization of the rotational movement of both drive press jaw halves and the press segments of the press insert is achieved by the connection featuring a common joint.

[0043] The coupling means and elements can enable both positive and frictional locking. Positive locking can be achieved through the configuration described below, either as a T-slot and head pin or as a coupling pin and a recess. Frictional locking can be achieved, for example, by an arrangement of magnets that preferably exert an attractive force centering the desired position.

[0044] For a positive locking 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 accommodate the coupling means.

[0045] The T-slots on the open side have undercuts facing both side walls, creating a rail. The coupling means of a press insert, in the form of a stud, can then engage in the T-slot and be moved within it without the stud disengaging. Furthermore, the coupling means can be designed such that, in the connected state, there is mechanical play between the coupling means and the coupling elements. In this configuration, the press insert and the drive press jaw are coupled to each other, but can also be coupled in a way that allows for easy sliding or pivoting, and is optionally suitable for sliding during the pressing process.

[0046] The head ends of the coupling pin have a radius larger than the radius of the pin section. This allows the coupling pin to engage behind an undercut section of a coupling element on the drive jaw. Such an undercut section is created by the partially open T-slot of the drive jaw's coupling elements, which allows each coupling pin to be slidably engaged with its head end.

[0047] A T-slot is understood to be a groove whose cross-section has a rectangular section corresponding to the crossbar of a T and a narrower, downward-opening section corresponding to the vertical line of the T. The directions "up" and "down" are chosen only as examples to draw a comparison with the letter "T".

[0048] The head of the head pin is positioned in the rectangular section of the T-crossbar, and the pin section of the head pin runs in the vertical line of the T. The head and the crossbar then form a coupling essentially perpendicular to the orientation of the T-crossbar, which can only be released by sliding along the groove open on both sides.

[0049] In a second embodiment of the press jaw, the coupling elements have coupling pins for a positive fit, and the coupling means have recesses and receive the coupling elements.

[0050] 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 by pressing into the recesses, so that the drive press jaw and press insert are detachably connected by means of the coupling elements and coupling means. The coupling pins are preferably provided on two opposing inner surfaces of the drive press jaw halves.

[0051] The recesses serving as coupling means can be arranged at two opposing locations on the outer sides of the press segments of the press insert, preferably completely in an area between the center of the press contour of the press insert and the joint means of the press insert, particularly preferably in a direction perpendicular to the horizontally oriented drive press jaw with connected press insert above and below the joint means of the press insert.

[0052] Preferably, the design of the recesses results in a projection which the coupling pins engage behind during the coupling process of the press insert with the drive press jaw; the coupling pins rest against the projection and fit positively into the grooves formed by the recesses.

[0053] This design of the coupling elements and coupling devices reduces the number of parts required for a pressing system, as the coupling pins are only located in the drive press jaw, and the various press inserts or the pulling insert merely have recesses. This type of system is mechanically simpler to manufacture. Furthermore, reducing the number of elements protruding from the component silhouette improves handling of the press tool. The press tool and the individual system components are easier to grip and less likely to snag on an operator's clothing.

[0054] As described above, the drive jaw can have retaining tabs on both sides to hold and support the individual components. A drive mechanism can also be connected to this, in particular designed as a double roller plunger with two rollers, to form a functional connection with a pressing tool, especially one that is hydraulically or electrically operated. The drive of the drive jaw halves can also be implemented by a toggle lever.

[0055] The press insert can also include a spring, preferably a torsion spring, which compresses the press segments of the press insert. When the press segments of the press insert are coupled to the drive jaw halves of the drive press jaw, the spring also compresses these halves. This facilitates the assembly of the press jaw, consisting of the drive press jaw and press inserts, onto a fitting. To further assist this movement, such a spring can also be incorporated into the drive press jaw.

[0056] To couple the press insert to the drive press jaw, it can be brought together with the drive press jaw halves in a slightly pivoted position, with the coupling means, in particular the coupling pins, engaging in the openings of the coupling elements, especially the T-slots. By rotating the press insert back, the coupling pins engage in the undercut of the T-slots. If, for example, the opening of the hollow bolt of the press insert is then aligned with the locking bolt located in one of the hollow bolts of the drive press jaw, the locking bolt can be inserted.

[0057] The same coupling process can also be achieved by designing the coupling means as a recess and the coupling elements as a pin.

[0058] In principle, the press jaw can be used with one of the following described configurations of the press insert and / or with one of the following described configurations of the drive press jaw.

[0059] The technical problem outlined above is further solved, according to a second teaching, in particular by a drive press jaw for pressing fittings with pipes using a press insert, comprising two drive press jaw halves, joint elements for connecting the drive press jaw halves, coupling elements for detachable connection to a press insert, and force transmission elements, wherein the joint elements enable the drive press jaw halves to pivot about a common axis or about two different axes, wherein connecting elements are provided for pivotable connection of the press insert, and wherein the force transmission elements are arranged at least predominantly, preferably completely, in an area between the center of the press contour of the press insert to be connected and the joint means of the press insert to be connected.

[0060] The advantages of the various preferred designs already described for the press jaw apply in the same way to the drive press jaw, so reference is made to the previous explanations at the relevant points.

[0061] 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°, particularly greater than 40°, especially preferably greater than 80° to each other.

[0062] Furthermore, the connecting elements and the joint elements can have the same axis or axis of rotation.

[0063] Alternatively, the connecting elements and the joint elements can have different axes, with the joint elements allowing the drive press jaw halves to pivot about a common axis or about different axes.

[0064] Furthermore, the coupling elements for the detachable mounting of coupling devices of the press insert can have partially open T-slots, and the force transmission elements can be designed as contact surfaces. Thus, the coupling elements enable the press insert to be pivotably held.

[0065] Alternatively, the coupling elements can have coupling pins. These coupling pins can then engage with appropriately designed coupling devices of a press insert, enabling the press insert to be pivotably held.

[0066] In addition, a spring, in particular a torsion spring, can be arranged in the drive press jaw, which pulls the drive press jaw halves together.

[0067] The joint elements can also be designed with at least one hollow bolt connecting both halves of the drive press jaw. Each hollow bolt can be connected to a retaining tab on the drive press jaw. Furthermore, the hollow bolts can pivot the halves of the drive press jaw about their common axis, and the hollow bolts can optionally be spaced apart from each other in the area between the retaining tabs.

[0068] This drive jaw does not directly function as a pressing jaw, but rather transmits a pressing force to the associated press insert. The design of the coupling elements is adapted to the coupling means of the press insert and allows for a detachable connection. The functions of coupling and force transmission are largely separate, so that specific designs are possible for each functionality.

[0069] The coupling elements can have partially open T-slots. These T-slots feature undercuts on the open side facing both side walls, creating a rail. The coupling element 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 disengaging. Alternatively, coupling pins and recesses of the type described above can be provided.

[0070] The drive press jaw also has a common holding structure, which is preferably designed as retaining tabs arranged on both sides for holding and connecting the drive press jaw halves and the press segments of the press insert.

[0071] Furthermore, the coupling elements are designed to allow the press insert to be pivotably held in place. For this purpose, the pivot point of the press insert is connected to the drive press jaw, preferably with the described tabs, in a pivotable manner. This rotatable and pivotable connection of the press insert achieves part of the coupling.

[0072] Furthermore, it is preferred that the joint elements of the drive press jaw have a hollow bolt connecting both drive press jaw halves. The two drive press jaw halves have tabs on both sides, each connected to the hollow bolt and sliding on the hollow bolt during pivoting. Since the hollow bolt is continuous, in this embodiment the drive press jaw halves have a pivot axis that is offset from the axis of the press insert.

[0073] Preferably, the joint elements of the drive press jaw have two hollow pins, each of which is connected on both sides to a retaining tab and pivots the drive press jaw halves about the common axis. The hollow pins each receive the tabs of the drive press jaw halves on one side. Additionally, the hollow pins can be spaced apart from each other in the area between the retaining tabs, so that the hollow pin of the press insert can be positioned in the space between the two hollow pins of the drive press jaw. Thus, both the press segments of the press insert and the drive press jaw halves of the drive press jaw are arranged on a common axis.Since both parts rotate around the same axis, the pressing process can be carried out with force transmission using flat force transmission means and force transmission elements without sliding of the surfaces and therefore without friction losses.

[0074] 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 its position with a fixing means.

[0075] The aforementioned technical problem is further solved according to a third teaching of the invention, in particular by a press insert for pressing fittings with pipes, comprising at least two press segments, press contours formed in the press segments, articulated elements for connecting the press segments, coupling elements for detachable connection to a drive press jaw, and force transmission elements. 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 pull jaw.

[0076] There are two possible arrangements for the insertion elements on the press insert relative to the joint elements. Firstly, the insertion elements can be positioned behind the center of the press contour, viewed from the joint elements. In this case, the insertion elements for the pull jaw are located where the press insert can be opened to be positioned on a fitting before pressing. The opened section is then compressed by the pull jaw, pressing the fitting.

[0077] On the other hand, the insertion elements can be arranged in an area between the center of the pressing contour and the joint points. For the definition of this area, reference is made to the arrangement explained above in connection with the pressing jaw. Thus, the insertion elements are arranged between the center of the pressing contour and the joint points.

[0078] The insertion devices are arranged on the outside of the press segments and the press insert can therefore be used not only as a press jaw insert for a connection with a drive press jaw but also as a press loop, which can be attached to a fitting independently of the drive press jaw and then pressed using a pull jaw.

[0079] The press inserts are designed as a press jaw insert with at least two press segments connected via the joints. This insert can be pressed from the joint side by means of the force transmission means and the application of force by the drive press jaw, and from the open closing side by means of the insertion means. Furthermore, a single press insert is easier to handle in terms of size, as its size and thus its weight can be adapted to the specific press contour being pressed.

[0080] Advantageously, the press inserts with their respective press contours for a given press dimension can be used both as press jaw inserts for a press jaw and as press loops, which can then be pressed by a pull jaw. Such a press loop can have two or more articulated press segments, which, with two press segments, can also be referred to as press jaw inserts, and with more than two press segments as press loops or press chains. In the following, the term press loop will be used generally for this.

[0081] The insertion elements in the press segments are preferably designed as recesses to receive the tensile elements of the tensile jaw. The tensile elements can then engage in the recesses with appropriately shaped projections and compress the press segments of the press insert.

[0082] Furthermore, the recesses allow the pulling elements to be applied at at least two, preferably several, different angles relative to the axis of the pipe to be pressed. This makes it possible to apply the pulling jaw even in confined spaces, particularly when applying it at a right angle to the axis of the pipe to be pressed is not possible. Preferably, the recesses are rotationally symmetrical and the pulling elements are cap-shaped, so that application at any desired angle is possible.

[0083] Furthermore, the joint means preferably enable, as part of the coupling means, a pivotable attachment of the press insert to a drive press jaw.

[0084] Furthermore, the joint components can be designed as a hollow bolt supporting two press segments. The two press segments are arranged on the hollow bolt and slide along its surface during rotation. The hollow bolt design allows the use of a locking bolt for the drive press jaw by inserting and positioning the locking bolt within the hollow bolt.

[0085] Furthermore, the coupling means can have coupling pins with heads. These heads have a radius larger than the radius of the pin section. This allows the coupling pin to engage behind an undercut feature of a coupling element on the drive jaw. Such an undercut feature could, for example, be a partially open T-slot in the coupling elements of the drive jaw, with which each coupling pin can be slidably engaged by its head. 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 also to be easily moved relative to each other for coupling and, if necessary, for sliding during the pressing process.

[0086] The coupling pins and the force transmission means are preferably arranged on the outside of the press segments in the area facing the joint means. This ensures that the force transmission through the drive press jaw occurs close to the joint axis of the press insert.

[0087] Alternatively, the coupling means can have recesses for the detachable reception of coupling elements of the drive press jaw. The recesses are preferably arranged on the outside of the press segments in the area facing the joint means, particularly preferably in a direction perpendicular to an axis that divides the press insert into two press segments, above and below the joint means.

[0088] The force transmission means of the press insert are preferably designed as contact surfaces, so that the force transmission elements of the drive press jaw, which are designed as contact surfaces, can transmit the force over a surface and, if necessary, slide on them during pressing.

[0089] Furthermore, it is advantageous for the described press insert if an elastic spring is provided to close the press segments. The spring can be designed as a torsion spring and closes the press insert both in its function as a press loop and in its function as the press jaw insert of the drive press jaw.

[0090] The spring secures the press insert preferably axially by means of a further provided hollow bolt, on which the press insert is preferably pivotably mounted. The spring can then preferably engage in the hollow bolt with at least half the wire diameter. Due to the axial securing by means of the spring, the press insert can be designed to be particularly narrow, especially narrower compared to a press insert secured by external retaining rings. Overall, this also allows the drive press jaw and the entire construction of the press jaw described above to be designed in a more space-saving manner, thus simplifying work in tight, difficult-to-access areas.

[0091] The technical problem outlined above is further solved according to a fourth teaching of the invention, in particular by a system for pressing fittings with pipes, comprising at least two press inserts and a drive press jaw. The press inserts have at least two press segments, press contours formed in the press segments, hinges for connecting the press segments, coupling elements for detachable connection to the drive press jaw, and force transmission elements, wherein the at least two press inserts have different press contours. The drive press jaw comprises two drive press jaw halves, hinge elements for connecting the drive press jaw halves, coupling elements for detachable connection to the press insert, and force transmission elements. The system is characterized in that at least one press insert with attachment means for attaching a pull jaw and a pull insert are provided.The pull insert comprises two pull insert halves, joint means for connecting the pull insert halves, coupling means for detachable connection to the drive press jaw, and power transmission means. The pull means and the power transmission means are arranged opposite the joint means, with the coupling means and the power transmission means being located on the outside of the pull insert halves. The pull insert and the drive press jaw together form the pull jaw.

[0092] Thus, the system comprises not only a set of press inserts and a drive press jaw, but also a pulling insert for compressing at least one press insert with attachments for use as a pressing loop. In this system, the press inserts are suitable both as press jaw inserts for a drive press jaw and as pressing loops, which can then be compressed using the pulling insert. The pulling insert can also be coupled to the drive press jaw using the same or corresponding coupling devices.

[0093] Preferably, the tensioning elements allow them to be attached to the insertion elements at at least two, preferably several, different angles relative to the axis of the pipe to be pressed. Since the press inserts are used as press loops in confined spaces, pressing is simplified if the tensioning elements can be attached to the insertion elements of the press insert at different angles.

[0094] In particular, the drive press jaw is designed according to one of the embodiments described above and / or the press insert is designed according to one of the embodiments described above.

[0095] The following describes embodiments 1-8 of a press jaw for pressing fittings with pipes, embodiments 9-14 of a drive press jaw for pressing fittings with pipes using a press insert, embodiments 15-22 of a press insert for pressing fittings with pipes, and embodiments 23-25 ​​of a system for pressing fittings with pipes: 1. Press jaw for crimping fittings to pipes, - with a press insert and - with a drive press jaw, - the press insert features: - at least two press segments, - a press contour formed in the press segments, - Joint components for connecting the press segments, - Coupling device for detachable connection to the drive press jaw and - Power transmission devices, - the drive press jaw features: - two drive press jaw halves, - Joint elements for connecting the drive press jaw halves, - Coupling elements for detachable connection to the press insert and - Power transmission elements, characterized by - that the joint means connect the press insert to the drive press jaw in a pivotable manner and - that the force transmission means and the force transmission elements are arranged at least predominantly, preferably completely, in an area between the center of the press contour and the joint means. 2. Press jaw according to embodiment 1, characterized by - that the power transmission means are designed as contact surfaces, - that the power transmission elements are designed as contact surfaces and - that the contact surfaces have an angle greater than 10°, preferably greater than 25°, particularly greater than 40°, and especially preferably greater than 80° to each other in pairs. 3. Press jaw according to embodiment 1 or 2, characterized by that the press insert and the drive press jaw halves can be pivoted about the same axis. 4. Press jaw according to one of embodiments 1 to 3, characterized by that the press insert and the drive press jaw halves can be pivoted about different axes, wherein the drive press jaw halves have the same axis or different axes. 5. Press jaw according to one of embodiments 1 to 4, characterized by - that the coupling means have coupling pins with head ends and - that the coupling elements have partially opened T-slots and accommodate the coupling means. 6. Press jaw according to one of embodiments 1 to 4, characterized by - that the coupling elements have coupling pins and - that the coupling means have recesses and accommodate the coupling elements. 7. Press jaw according to one of embodiments 1 to 6, characterized by that the press insert is designed according to one of the embodiments 15 to 22. 8. Press jaw according to one of embodiments 1 to 7, characterized by that the drive press jaw is designed according to one of the embodiments 9 to 14. 9. Drive press jaw for pressing fittings to pipes using a press insert, - with two drive press jaw halves, - with joint elements for connecting the drive press jaw halves, - with coupling elements for detachable connection with a press insert and - with power transmission elements, - wherein the joint elements enable the drive press jaw halves to pivot about a common axis or about two different axes, characterized in that - that connecting elements are provided for pivoting the connection of the press insert and - that the force transmission elements are arranged at least predominantly, preferably completely, in an area between the center of the press contour of the press insert to be joined and the joint means of the press insert to be joined. 10. Drive press jaw according to embodiment 9, characterized by - that the power transmission elements are designed as contact surfaces and - that the mounting surfaces have an angle greater than 10°, preferably greater than 25°, particularly greater than 40°, especially preferably greater than 80° to each other. 11. Drive press jaw according to embodiment 9 or 10, characterized by that the connecting elements and the joint elements have the same axis. 12. Drive press jaw according to one of the embodiments 9 to 11, characterized by that the connecting elements and the joint elements have different axes, with the joint elements allowing the drive press jaw halves to pivot about a common axis or about different axes. 13. Drive press jaw according to one of the embodiments 9 to 12, characterized by - that the coupling elements for the detachable mounting of coupling means of the press insert have partially opened T-slots and - that the power transmission elements are designed as contact surfaces. 14. Drive press jaw according to one of the embodiments 9 to 12, characterized by that the coupling elements have coupling pins. 15. Press insert for crimping fittings to pipes, - with at least two press segments, - with press contours formed in the press segments, - with joints for connecting the press segments, - with coupling means for detachable connection to a drive press jaw and - with power transmission devices, characterized by - that the press segments have attachment means for attaching a pulling jaw. 16. Press insert according to embodiment 15, characterized by that the insertion elements in the press segments are designed as recesses for receiving the pulling elements of the pulling jaw. 17. Press insert according to embodiment 15 or 16, characterized by that the recesses allow the pulling means to be applied at least two, preferably several different angles relative to the axis of the pipe to be pressed. 18. Press insert according to one of embodiments 15 to 17, characterized by that the joint means allow the press insert to be pivotably attached to a drive press jaw. 19. Press insert according to one of the embodiments 15 to 18, characterized by that the power transmission means are designed as contact surfaces. 20. Press insert according to one of embodiments 15 to 19, characterized by - that the coupling means have coupling pins and - that the coupling pins are provided with head ends. 21. Press insert according to one of embodiments 15 to 19, characterized by - that the coupling means for the detachable reception of coupling elements of the drive press jaw have recesses. 22. Press insert according to one of embodiments 15 to 21, characterized by that an elastic spring is provided for closing the press segments. 23. System for crimping fittings to pipes, - with at least two press appearances and - with a drive press jaw, - which show the press releases: - at least two press segments, - Press contours formed in the press segments, - Joint components for connecting the press segments, - Coupling device for detachable connection to the drive press jaw and - Power transmission devices, - wherein the at least two press inserts have different press contours and - the drive press jaw features: - two drive press jaw halves, - Joint elements for connecting the drive press jaw halves, - Coupling elements for detachable connection to the press insert and - Power transmission elements, characterized by - that at least one press insert has a setting device for attaching a pulling jaw, - that a train deployment is planned and shows: - two train sets, - Joint components for connecting the two halves of the traction insert, - Coupling device for detachable connection to the drive press jaw and - Power transmission devices and - traction elements positioned opposite the joint means, - wherein the coupling means and the power transmission means are arranged on the outside of the train insert halves, and - that the pull insert and the drive press jaw form the pull jaw. 24. System according to embodiment 23, characterized by that the pulling means allow insertion into the insertion means at least two, preferably several different angles relative to the axis of the pipe to be pressed. 25. System according to embodiment 23 or 24, characterized by that the drive press jaw is designed according to one of the embodiments 9 to 14 and / or that the press insert is designed according to one of the embodiments 15 to 22.

[0096] The invention will now be explained using exemplary embodiments with reference to the drawing. The drawing shows... Fig. 1a-f an embodiment of a system for pressing fittings with pipes in schematic representation, Fig. 2a-c a first embodiment of a press jaw with a press insert and a drive press jaw, Fig. 3a-b the press jaw after Fig. 2 during the coupling process of the press insert with the drive press jaw, Fig. 4a-b a drive press jaw of a press jaw according to Fig. 2, Fig. 5a-d a press insert of a press jaw according Fig. 2, Fig. 6a-d a first embodiment of a train deployment, in particular for a system according to Fig. 1e and f, Fig. 7a-c a second example of a press jaw with a press insert and a drive press jaw, Fig. 8a-c the press jaw after Fig. 7 when open, Fig. 9a-b the press jaw after Fig. 7 during the coupling process of the press insert with the drive press jaw, Fig. 10a-b a drive press jaw of a press jaw according to Fig. 7, Fig. 11a-d a press insert of a press jaw according to Fig. 7, Fig. 12a-b a third embodiment of a drive press jaw, Fig. 13a-b a press insert for a drive press jaw according to Fig. 12, Fig. 14a-b a pull insert for a drive press jaw according to Fig. 12 and Fig. 15 an embodiment of a system for crimping fittings to pipes.

[0097] In the following description of the various embodiments according to the invention, components and elements with the same function and mode of operation are provided with the same reference numerals, even if the components and elements may differ in their dimensions or shape in the various embodiments.

[0098] In the following, exemplary embodiments of a system according to the invention for pressing fittings with pipes are first explained with reference to schematic diagrams. Subsequently, details of the press jaws, drive press jaws, press inserts and pulling inserts according to the invention are discussed with reference to various exemplary embodiments.

[0099] The Fig. Figures 1a to 1f show, by means of schematic representations, various embodiments of a system according to the invention for pressing fittings with pipes.

[0100] In the Fig. Figures 1a to 1d show a press jaw comprising a drive press jaw and a press insert schematically, with rotatable and fixed axes indicated to illustrate the functioning of the interaction between the drive press jaw and the press insert.

[0101] Furthermore, in Fig. 1d the angle α of the contact surfaces to each other is specified and the force effect of the resultant force during pressing is represented by means of a force diagram.

[0102] In the Fig. 1e and Fig. Figure 1f shows another press insert and furthermore a pull jaw is shown schematically to illustrate the function of the pull jaw in combination with the press insert.

[0103] Fig. Figure 1a shows a first embodiment of a system 100 according to the invention for pressing fittings with pipes, comprising a press jaw 2, a press insert 10 with two press segments 12a, 12b, wherein a press contour 14 is formed in the press segments 12a, 12b, and further comprising a drive press jaw 30 with two drive press jaw halves 32a, 32b and hinge elements 36. The press insert 10 has coupling means 18a, 18b by means of which the press insert 10 is detachably connected to the drive press jaw 30. Furthermore, the press insert 10 has hinge means 16 for connecting the press segments 12a, 12b, wherein the hinge means 16 also pivotably connect the press insert 10 to the drive press jaw 30.

[0104] Furthermore, the press insert 10 has power transmission means 22, and the drive press jaw 30 has power transmission elements 42 (shown schematically), which are arranged entirely in an area between the center of the press contour 14 and the pivot points 16. In the present view, the press jaw 2 is horizontally aligned with the drive press jaw 30, and the drive of the press tool runs horizontally. Only two rollers 31a, 31b of a double roller ram are shown, which engage with and interact with entry contours 30a, 30b. During the feed of the rollers 31a, 31b, in Fig. As the drive press jaw halves 32a and 32b are moved to the left (1a), they are pushed apart, thus pressing the force transmission elements 42a and 42b, and consequently the press segments 12a and 12b, together. This results in the crimping of a fitting.

[0105] The axis of the press contour 2 is perpendicular to the side view and perpendicular to the plane of the paper, with the center of the press contour 2 corresponding to the axis of the press contour 14 and thus to the axis of the tube to be joined (not shown). The axis of the joint center 16 of the press insert 10 is also perpendicular to the horizontal orientation of the press jaw 2 and perpendicular to the plane of the paper.

[0106] The area between the center of the press contour 14 and the joint means 16 then corresponds to the space between a plane extending in the plane of the drawing perpendicular to the axis of the press contour 14 and perpendicular to the horizontal direction, and a plane extending in the plane of the drawing perpendicular to the axis of the joint means 16 and perpendicular to the horizontal direction. The press insert 10 is actuated by a movement of the drive press jaw 30 via the coupling means 22 of the press insert 10, which are coupled to the coupling elements 42 of the drive press jaw 30 and are designed here as contact surfaces 22a, 22b. The press insert 10 can be opened by pressing the drive press jaw halves 32a, 32b together, whereby the movement of the drive press jaw halves 32a, 32b is limited by the collision of the ends of the drive press jaw halves 32a, 32b opposite the ends supported by the joint elements 36 (schematically shown).

[0107] In the Fig. In the embodiment of the press jaw 2 shown in Figure 1a, the press insert 10 and the drive press jaw halves 32a, 32b are arranged to pivot about a common axis 4a. The two press segments 12a, 12b of the press insert 10 and the two drive press jaw halves 32a, 32b of the drive press jaw 30 rotate about the same axis 4a; thus, the articulating means 16 and the articulating elements 36 are arranged to rotate and pivot on the same axis 4a.

[0108] In Fig. Figure 1b shows an embodiment of a press jaw 102 in which the press insert 10 and the drive press jaw halves 132a, 132b of the drive press jaw 130 are pivotably arranged about different axes 4b, 6a, wherein the drive press jaw halves 132a, 132b have the same axis 6a. Thus, an embodiment of the press jaw 102 with two axes 4b, 6a is shown.

[0109] In Fig. Figure 1c shows an embodiment of a press jaw 202 in which the press insert 10 and the drive press jaw halves 232a, 232b are pivotably arranged about different axes 4b, 6b, 6c, wherein the drive press jaw halves have different axes 6b, 6c. Thus, an embodiment of the press jaw 202 with three axes 4b, 6b, 6c is shown.

[0110] Fig. Figure 1d shows a press insert 10, where the force transmission from a drive press jaw (not shown) to the press insert 10 is represented by two arrows 8a, 8b. This force application 8a, 8b is at an angle to each other and both arrows 8a, 8b are pointing in Fig. 1d in a force parallelogram into the horizontal components 8a h , 8b h and the vertical components 8a v , 8b v divided.

[0111] The force compressing the press insert 10, generated by the force transmission means 22 and the force transmission elements (not shown) of the drive press jaw, is transferred by the two vertical components 8a v , 8b v formed. The two horizontal components 8a h , 8b h result in a force 8c, directed from the position of the joint means 16 in the direction away from the schematically shown bearing of the press insert 10.

[0112] The resultant force 8c, as a linear force component, is balanced by the bearing of the press insert 10 relative to a drive press jaw (not shown). Thus, the opposing vertical force components 8a remain. v , 8b v .

[0113] The force transmission means 22, which are designed here as planar contact surfaces 22a, 22b, have an angle α relative to each other, 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 each other. Here, an angle α of greater than 80° is shown.

[0114] The Fig. 1e and Fig. Figure 1f shows further elements of the system for pressing fittings with pipes, comprising a press insert 110 with two press segments 112a, 112b, wherein a press contour 114 is formed in the press segments 112a, 112b and wherein the press segments 112a, 112b are connected to each other via hinge means 116. The press insert 110 further has attachment means 128 for a pull jaw 60, so that a fitting can be pressed by means of the pull means 74a, 74b of the pull jaw 60 (shown only schematically) by compressing the press insert 110. Fig. 1e and Fig. Figures 1f show two possibilities for such a pressing operation, in which the press insert 110 is used as a pressing loop. The press insert 110 is neither supported nor otherwise connected to the drive press jaw, as shown in the Fig. shown in 1a to 1d.

[0115] First, it shows Fig. 1e a press insert 110 with attachment means 128 in the form of recesses 128a, 128b, which are arranged on the outside of the press segments 112a, 112b viewed from the joint means 116 in front of the center of the press insert 110.

[0116] Fig. Figure 1f shows a press insert 110 with positioning elements 128 in the form of recesses 128c, 128d, which are located on the outside of the press segments 112a, 112b, viewed from the hinge elements 116 and behind the center of the press insert 110. Thus, in this case, the positioning elements 128 are located where the press insert 110 can be opened to be positioned on a fitting before pressing. The opened section is then compressed by the pull jaw 60, pressing the fitting.

[0117] The attachment means 128 can also be designed as coupling means that interact with the coupling elements of a drive press jaw. In this case, the attachment means 128 serve both for force transmission when using a press insert 110 in its function as a press jaw insert and when using it in its function as a press loop.

[0118] The Fig. Figures 2a to 2c show a first embodiment of a press jaw 2 with a press insert 10 and a drive press jaw 30, in particular for a system according to Fig. 1a and Fig. 1d. Fig. 2a first shows the press jaw 2 in a perspective side view, Fig. Figure 2b shows the press jaw 2 in a side sectional view in the closed state and Fig. 2c in a side sectional view in the open state,

[0119] The press jaw 2 has a press insert 10 and a drive press jaw 30 with joint elements 36 in the form of two hollow bolts 46a, 46b, which pivotably mount the two drive press jaw halves 32a, 32b about the common axis 4a. The hollow bolts 46a, 46b are also Fig. 4a and Fig. 4b. Retaining tabs 50a, 50b are provided for holding and connecting the drive press jaw halves 32a, 32b. A drive mechanism 54, in this case designed as a double roller plunger with two rollers 56a, 56b, is connected to the retaining tabs 50a, 50b, the drive mechanism 54 forming a functional connection with a press tool (not shown). The rollers 56a, 56b interact with an entry contour (not shown) of the drive press jaw halves 32a, 32b, as described above.

[0120] During pressing, the fitting to be pressed (not shown) is received by the press segments 12a, 12b or the press contour 14 of the press insert 10 and at least partially deformed, the deformation being influenced by the design of the press contour 14. The two press segments 12a, 12b are connected to each other via joint means 16, which in this case is designed as a hollow bolt 44 supporting both press segments 12a, 12b. An elastic spring 48 serves to close the press segments 12a, 12b.

[0121] The press insert 10 is coupled to the drive press 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-slots 38a, 38b, wherein the coupling pins 18a, 18b engage in the undercuts formed by the T-slots 38a, 38b when coupled. The force transmission elements 42 of the drive press jaw 30 are designed as contact surfaces 42a, 42b which bear against the force transmission means 22 of the press insert 10, which are designed as contact surfaces 22a, 22b. When a fitting is pressed together, the press insert 10 is compressed by transferring the force generated by the pressing tool to the press insert 10 via the force transmission elements 42 and the force transmission means 22.

[0122] Similarly, the mounting surfaces 42a, 42b have an angle α relative to each other, where the angle α is measured between two planes 45a, 45b associated with the mounting surfaces 42a, 42b. Here, an angle α greater than 80° is shown. In the Fig. In the closed state of the drive press jaw 30 with coupled press insert 10 shown in 2b, it can be seen that the angle between the contact surfaces 22a, 22b corresponds to the angle between the contact surfaces 42a, 42b.

[0123] Because of the coincident axes of rotation, the force transmission means do not slide on the force transmission elements during pressing, thus minimizing or even eliminating friction losses during force transmission from the drive press jaw 30 to the press insert 10. Since the sliding motion is eliminated, the T-slots 38a, 38b, which serve as coupling elements 38, can be made shorter compared to the shapes of T-slots used as coupling elements in press jaws where the force transmission means slide on the force transmission elements during pressing. This simplifies the coupling process of the press insert 10 with the drive press jaw 30.

[0124] In this embodiment, the press insert 10 and the drive press jaw 30 of the press jaw 2 are pivotable about a common pivot axis 4a. For this purpose, a hollow bolt 44, which supports both press segments 12a, 12b of the press insert 10, is arranged between the two hollow bolts 46a, 46b, which support the drive press jaw halves 32a, 32b of the drive press jaw 38. A locking bolt 50 is further arranged in the hollow bolts 44, 46a, 46b as a common pivot axis 4a. The locking bolt 50 thus serves to pivotally connect the press insert 10 to the drive press jaw 30 and also pivots the drive press jaw halves 32a, 32b. The connecting elements 52, which pivotably connect the press insert to the drive press jaw 30, are in this case designed as hollow bolts 44, 46a, 46b and locking bolts 50.

[0125] Furthermore, the press insert 10 has insertion means 28 in the form of rotationally symmetrical recesses 28a, 28b, into which the pulling means of a pulling jaw 60 (see schematic in Fig. 1e and Fig. 1f) can intervene. The press insert 10 can thus also be used as a press loop. This enables the pressing of fittings in hard-to-reach areas of the installation, for example in room corners. Thus, the advantageous design of the press insert 10 results in its suitability both in conjunction with a drive press jaw 30 as a press jaw insert and as a press loop in conjunction with a pull jaw 60, as used in connection with Fig. 1e and Fig. 1f has been shown.

[0126] In the Fig. 3a and Fig. 3b is the press jaw according to Fig. 2a-c during the coupling process of the press insert 10 with the drive press jaw 30 in a side sectional view ( Fig. 3a) and in a perspective view ( Fig. 3b) shown. First, the press insert 10 is inserted into the drive press jaw 30 in a slightly swivelled position 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 press insert 10 back into the (horizontally shown here) position of the drive press jaw 30, the coupling pins 18a, 18b engage in the undercut of the T-slots 38a, 38b. If the opening of the hollow bolt 44 is aligned with the openings of the hollow bolts 46a, 46b of the drive press jaw 30, the locking bolt 50 can be inserted.

[0127] In Fig. 4a and Fig. 4b is a drive press jaw 30 of a press jaw 2 according to Fig. Figure 2 shows a perspective view and a side view. The locking bolt 50, arranged as a common pivot axis 4a (shown in Figure 2), is shown in Figure 3. Fig. 2 and Fig. 3) is supported both by the hollow bolts 46a, 46b of the drive press jaw halves 32a, 32b and by the retaining tabs 50a, 50b (see Fig. 2) enclosed.

[0128] The drive press jaw halves 32a, 32b each have undercut recesses in the form of a partially open T-slot 38a, 38b, serving as coupling elements 38. The head ends 24a, 24b of the coupling pins 18a, 18b of the press 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 the press insert 10 and the drive press jaw 30 to move slightly relative to each other during pressing. The force transmission elements 42 are designed as flat contact surfaces 42a, 42b.

[0129] Fig. Figures 5a to 5d show a press insert 10 of a press jaw. Fig. 2, wherein in Fig. 5c a sectional view through the in Fig. 5b shows the section axis Vc and where in Fig. 5d the in Fig. 5b is shown by the top view from the direction Vd of the side of the press insert 10 having the joint means 16.

[0130] In the Fig. 5a and Fig. In the view shown in 5b, the force transmission means 22 of the press insert 10, designed as contact surfaces 22a, 22b, are clearly visible. These contact surfaces 22a, 22b and the force transmission elements 42 of the drive press jaw 30, also designed as contact surfaces 42a, 42b, are shown below. Fig. 4 enables a planar force transmission independent of the coupling. Furthermore, the design as partially open T-slots 38a, 38b allows for particularly smooth insertion of the press insert 10 into the drive press jaw 30, thus simplifying the handling of the press tool.

[0131] Based on the in Fig. 5c and Fig. Figure 5d shows the spring 48, which tensions the press segments 12a, 12b of the press insert 10 against each other and thus serves to close the press insert 10. Retaining rings 43a, 43b are provided for axially securing the hollow bolt 44.

[0132] Fig. Figures 6a to 6d show a first embodiment of a train insert 72, in particular for a system according to Fig. 1e and Fig. 1f, wherein in Fig. 6c a sectional view through the in Fig. 6b shows the section axis VIc and where in Fig. 6d the in Fig. Figure 6b shows the top view from direction VId of the side of the pull insert 70 having the joint means 76. The joint means 76 serve to connect the pull insert halves 72a, 72b. Furthermore, coupling means 78, here in the form of coupling pins 78a, 78b with head ends 84a, 84b, are provided for coupling the pull insert 70 to a drive press jaw 30 (not shown in Figure 6b). Fig. 6) provided. Thus, the pulling insert 70 and the drive pressing jaw 30 act together as one pulling jaw 60, as shown in Fig. 1e and Fig. Figure 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 pull insert halves 72a, 72b. The pull insert halves 72a, 72b each have pull means 74a, 74b located opposite the joint means 76, which are connected to the attachment means 28 of a (not in Fig. The press insert 10 (shown in diagram 6) engages. The pull insert 70 and the drive press jaw 30 thus act as a pull jaw 60 (see diagram). Fig. 1e and Fig. 1f) together and press the press insert 10 radially inwards. In this case, the press insert 10 serves as a press loop, simplifying the pressing of fittings in hard-to-reach or spatially confined work areas.

[0133] The force transmission means 82 of the pull insert 70, designed as contact surfaces 82a, 82b, together with force transmission elements of a drive press jaw (not shown), which are also designed as flat contact surfaces, enable a planar force transmission that is independent of the coupling of the pull insert 70 with the drive press jaw 30. The coupling of the pull insert 70 with the drive press jaw 30 can be carried out analogously to the coupling of a press insert 10 with a drive press jaw 30.

[0134] The joint elements 76 are designed as hollow bolts 94, which pivotably mount the two pull-insert halves 72a, 72b. A spring 88 serves to close the pull-insert 70 by tensioning the two pull-insert halves 72a, 72b against each other. Retaining rings 73a, 73b are provided for axial securing of the hollow bolt 94.

[0135] In Fig. Figures 7a to 7c represent a second embodiment of a press jaw 202 with a press insert 210 and a drive press jaw 230 with two drive press jaw halves 232a, 232b, in particular for a system according to Fig. 1c, shown in the closed state. Fig. Figure 7a shows a perspective view of the press jaw 202, whereas Fig. 7b a side view and Fig. Figure 7c shows a side sectional view.

[0136] In contrast to the one in Fig. In the embodiment shown in Figure 2, the press jaw 202 has different axes of rotation 4b, 6b, 6c for the press insert 210 and the drive press jaw halves 232a, 232b, wherein the drive press jaw halves 232a, 232b have different axes 6b, 6c. Thus, this embodiment has three axes of rotation 4a, 6b, 6c. The drive press jaw halves 232a, 232b and the press insert 210 are connected 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 here empty, serves for connection to a press tool (not shown).

[0137] By providing different axes around which the press insert 210 and the drive press jaw halves 232a, 232b are rotatably mounted, the overall thickness of the press jaw 202 can be reduced and the overall design simplified. Due to the simpler design, the manufacture of the drive press jaw 230 is less complex and therefore more cost-effective.

[0138] In this embodiment of a press jaw 202, the press insert 210 also provides press segments 212a, 212b or a press contour 214 for receiving the fitting to be pressed. The two press segments 212a, 212b are connected to each other via hinges 216, the hinges 216 being designed as a hollow bolt 244 that supports both press segments 212a, 212b and is axially secured by a spring 248. The spring 248 engages with at least half its wire diameter in the central groove 245 of the hollow bolt 244, as shown in the enlarged section from Fig. 11c is shown and explained further below.

[0139] In this way, the joint of the press insert 210 can be designed to be narrow, in particular narrower than with a comparable locking mechanism using retaining rings as in the previously described embodiments of a press insert 10. 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, this allows for a more space-saving design of the entire construction, thus simplifying work in tight, hard-to-reach places.

[0140] The spring 248 additionally tensions the two press segments 212a, 212b against each other. Furthermore, the press insert 210 has rotationally symmetrical recesses 228a, 228b as insertion means, by means of which the press insert 210, in conjunction with a pulling jaw 60 (see schematic in Fig. 1e and Fig. 1f) can be used as a press loop. A locking bolt 250 secures the pivotable mounting of the press insert 210 on the hollow bolt and simultaneously serves to secure the connection with the drive press jaw 230 via the side plate 276. The drive press jaw halves 232a, 232b are connected to the side plate 276 by means of locking bolts 262, 264 and are pivotably mounted.

[0141] The press insert 210 also has coupling means 218 in the form of coupling pins 218a, 218b with head ends 224a, 224b, and the drive press jaw 230 has coupling elements 238 in the form of partially open T-slots 238a, 238b. The force transmission elements 242 of the drive press jaw 230 are designed as contact surfaces 242a, 242b, which bear against the force transmission means 222 of the press insert 210, which are designed as contact surfaces 222a, 222b. When a fitting is pressed, the press insert 210 is compressed by the force generated by the pressing tool (not shown) being transmitted to the press insert 210 via the force transmission elements 242 and the force transmission means 222.

[0142] In the present case, the shape of the press insert 210 differs from the press inserts 10, 110 described above in that the sections of the outside of the press segments 212a, 212b, which lie between the coupling means 222, are constructed in a round shape, so that these sections of the press segments 212a, 212b lie on the radius of a common circle when the press insert 210 is closed.

[0143] In Fig. 8a to 8c is the press jaw 202 according to Fig. 7 shown in the open state, whereby Fig. 8a a perspective view, Fig. 8b a side view and Fig. Figure 8c shows a side sectional view. Opening the press jaw 202 and thus the press insert 210, so that a fitting to be pressed can be enclosed with the press insert 210, is achieved by pressing together the rear ends (pointing away from the press insert 210) of the drive press jaw halves 232a, 232b.

[0144] Fig. 9a and Fig. 9b now show, in conjunction with Fig. 10a and Fig. 10b the press jaw 202 after Fig. 7 during the coupling process of the press insert 210 with the drive press jaw 230. In Fig. 10a and Fig. 10b is the drive press jaw 230 according to Fig. 7 without the press insert 210 shown in a perspective view and in a side view.

[0145] The joint elements 236 connect the drive press jaw halves 232a, 232b and enable the drive press jaw halves 232a, 232b to pivot about different axes 6b, 6c.

[0146] The rounded sections of the press segments 212a, 212b between the coupling means 222 of the press insert 210 enable the pivoting movement of the press insert 210 for coupling the coupling elements 222 into the coupling means 238 to occur on a circular path, without first pivoting the press insert 210 from the horizontal position of the drive press jaw 230. This handling is easier for the user to implement, thus improving the coupling of the press insert 210 into the drive press jaw 230.

[0147] Is the opening of the hollow bolt 244 of the press insert 210 congruent with the bearing eye 300 of the side plate 276 provided for the bearing of the press insert 210? Fig. 10a and Fig. 10b), the locking bolt 250, which represents the pivot axis 4b of the press insert 210, can be inserted to secure the connection between the press insert 210 and the drive press jaw 230.

[0148] According to Fig. 10a and Fig. 10b has the drive press jaw 230 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 this case, the T-slots 238a, 238b are longer compared to the T-slots 38a, 38b in order to ensure coupling of the press insert 210 during the entire opening movement of the drive press jaw 230.

[0149] Fig. Figures 11a-d show the press insert 210 of the press jaw. Fig. 7, wherein in Fig. 11c a sectional view through the in Fig. 11b shows the section axis XIc and where in Fig. 11d the in Fig. 11b is shown by the top view from direction XId of the side of the press insert 210 having the joint means 216.

[0150] In the Fig. The perspective view shown in 11a and the one in Fig. In the sectional view shown in Figure 11b, the force transmission elements 222 of the press insert 210, designed as contact surfaces 222a, 222b, are clearly visible. These contact surfaces 222a, 222b, and the force transmission elements 242 of the drive press jaw 230, also designed as contact surfaces 242a, 242b, enable a planar force transmission independent of the coupling of the press insert 210 to the drive press jaw 230. During force transmission, the outer surface of the press segments 112a, 112b slides along the contact surfaces 242a, 242b and, by coupling force into the press insert 210, causes the fitting to be pressed with a pipe to be pressed.

[0151] The force transmission means 222, designed as contact surfaces 222a, 222b, can be assigned a plane 226a, 226b, so that an angle α between the planes 226a, 226b can be defined. Here, an angle α of greater than 25° (measured using the planes 227a, 227b, which run parallel to the planes 226a, 226b) is shown.

[0152] Based on the in Fig. 11c and Fig. In the illustration shown in 11d, the spring 248 is shown, which axially secures the hollow bolt 244.

[0153] In Fig. 12a and Fig. 12b and Fig. 13a and Fig. 13b is a third embodiment of a press jaw 302 comprising a drive press jaw 330 ( Fig. 12) and a press kit 310 ( Fig. 13a and Fig. 13b) shown.

[0154] Fig. 12a and Fig. Figure 12b shows a third embodiment of a drive press jaw 330, which has two drive press jaw halves 332a, 332b, which are pivotably mounted about a common axis 4a. Furthermore, the drive press jaw 330 has coupling elements 338 in the form of coupling pins 338a, 338b for detachable connection with corresponding coupling means 318 of a press insert 310. The tabs 350a, 350b, 351a, 351b of the drive press jaw 230 have circular openings for receiving hinge elements, for example hollow bolts, as well as a locking bolt, for detachably connecting the drive press jaw 230 to the press insert 310. The press insert 310 is mounted about the same pivotable axis 4a as the drive press jaw 330.

[0155] In Fig. 13a and Fig. Figure 13b shows the press insert 310 with two press segments 312a, 312b in which a press contour 314 is formed. Furthermore, attachment means 328 in the form of rotationally symmetrical recesses 328a, 328b are shown, into which the tension means 74a, 74b of a tension 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 press insert 310 about the axis 4a common with the drive press jaw 330.

[0156] The press insert 310 further comprises coupling means 318 for the detachable reception of the coupling elements 338 of the drive press jaw 330 in the form of recesses 318a, 318b. The recesses 318a, 318b are designed such that the projecting coupling pins 338a, 338b engage in the recesses 318a, 318b during the coupling process of the press insert 310 with the drive press jaw 330 by bearing into them.

[0157] The coupling pins 338a, 338 are provided on two opposing inner surfaces of the drive press jaw halves 332a, 332b of the drive press jaw 330. The recesses 318a, 318b, serving as coupling means 318, are formed at two opposing locations on the outer surfaces of the press segments 312a, 312b of the press insert 310. The recesses 318a, 318b are located entirely within a region between the center of the press contour 314 of the press insert 310 and the pivot points 316 of the press insert 310, and in a direction perpendicular to the horizontally oriented drive press jaw 330 with the connected press insert 310 (see Fig. 15) arranged above and below the joint means 316 of the press insert 310.

[0158] By such a design of the recesses 318a, 318b, a projection 319a, 319b is formed in each recess 318a, 318b, which the coupling pins 338a, 338b engage behind during the coupling process of the press insert 310 with the drive press 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.

[0159] The coupling process and the power transmission between the drive press jaw 330 and the press insert 310 are analogous to that already described using the Fig. Figures 2 to 4 illustrate the first embodiment of a press jaw 2 with drive press jaw 30 and press insert 10. For example, the force transmission elements 342 of the drive press jaw 330 and the force transmission means 322 of the press insert 310 can be designed as contact surfaces. The pivot means of the drive press 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 press jaw 330 and the hollow bolt 344 of the press insert 310 after the coupling process. The locking bolt thereby secures the connection between the drive press jaw 330 and the press insert 320 and forms the common pivot axis 4a of the drive press jaw 330 and the press insert 310.

[0160] Fig. 14a and Fig. Figure 14b shows an embodiment of a pull insert 370, in particular for connection with a drive press jaw 330 according to Fig. 12. The joint elements 376 serve to connect the pull-insert halves 372a, 372b. Furthermore, coupling elements 378 are provided for detachable connection to the drive press jaw 330, here in the form of recesses 378a, 378b. The coupling elements 378 engage with the coupling elements 338 of the drive press jaw 330, which are designed as coupling pins 338a, 338b, by means of a rearward engagement of the coupling pins 338a, 338b.

[0161] The pulling insert halves 372a, 372b each have pulling elements 374a, 374b positioned opposite the joint elements 376. Using the pulling elements 374a, 374b, which are inserted into the attachment elements 28, 128, 228, 328 of a (not in Fig. 14 shown) press insert 10, 110, 210, 310 engage, and a drive press jaw 330 after Fig. The press insert 10, 110, 210, 310 can be pressed in position 12. In this case, the press insert 10, 110, 210, 310 serves as a press loop, simplifying the pressing of fittings in hard-to-reach or spatially confined work areas.

[0162] In this way, the coupling elements 338 of the drive press jaw 330 are detachably connected on the one hand to a pull insert 370 as a pull jaw 60 (as schematically shown in Fig. 1e and Fig. (shown in 1f) and, on the other hand, can be used with a press insert 310 as a press jaw 302. This reduces the number of tools that need to be kept on the construction site for pressing fittings with pipes and simplifies the pressing process.

[0163] The power transmission from the drive jaw 330 to the pull insert 370 is analogous to the preceding embodiments of the press jaws 2, 192, 202, 302, by means of power transmission elements 342 of the drive jaw 330 and power transmission means 382 of the pull insert 370. The pivot means 376 of the pull insert 370 are designed as hollow bolts 394, which pivotably mount the two pull insert halves 372a, 372b about a common axis 4a. The pivot axis 4a is a pivot axis 4a common to the drive jaw halves 332a, 332b, so that the pivot means 376 of the pull insert and the pivot means of the drive jaw are pivotably mounted on the same axis.

[0164] Fig. Figure 15 shows an embodiment of a system 400 for pressing fittings with pipes, wherein the system 400 has a pull insert 370 according to Fig. 14, a first press deployment 310 after Fig. 13, a second press insert 410, a third press insert 510 and a drive press jaw 330 according to Fig. 12 and further 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 outer dimensions of 12, 18 and 35 mm.

[0165] 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 this case, a pressing insert 410 is detachably connected to the drive pressing jaw 330, so that fittings can be pressed onto pipes by means of the pressing insert 410 and by means of a force generated by the pressing tool 404 and transmitted to the pressing insert 410 by the drive pressing jaw 330.

Claims

[1] Press insert or press loop (10, 110, 210, 310, 410, 510) for pressing fittings to pipes, - with at least two press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b), - with press contours (14, 114, 214) formed in the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b) and - with joint elements (16, 116, 216, 250, 316) for connecting the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b), - wherein the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b) have attachment means (28, 128, 228, 328) for attaching a pulling jaw (60), characterized by , - that the joint means (16, 116, 216, 250, 316) are designed as a hollow bolt (244) which centrally supports the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b) and is axially secured by means of a spring (248). [2] Press insert or press loop according to claim 1, characterized by, that the attachment means (28, 128, 228, 328) in the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b) are designed as recesses (28a, 28b, 128a, 128b, 228a, 228b, 328a, 328b) for receiving tensile means (74a, 74b, 374a, 374b) of the tensile jaw (60). [3] Press insert or press loop according to claim 2, characterized by , that the recesses (28a, 28b, 128a, 128b, 228a, 228b) allow the pulling means (74a, 74b, 374a, 374b) to be applied at least two, preferably several different angles with respect to the axis of the pipe to be pressed. [4] Press insert or press loop according to any one of claims 1 to 3, characterized by , that coupling means (18, 218, 318) are provided for detachable connection with a drive press jaw (30, 130, 230, 330) and power transmission means (22, 222, 322). [5] Press insert or press loop according to any one of claims 1 to 4, characterized by, that the joint means (16, 116, 216, 250, 316) enable a pivotable attachment of the press insert (10, 110, 210) to a drive press jaw (30, 130, 230, 330). [6] Press insert or press loop according to any one of claims 1 to 5, wherein the spring (48, 248) is provided for closing the press segments (12a, 12b, 112a, 112b, 212a, 212b). [7] 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 press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b), - with joint elements (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 connecting, in particular detachable connecting, with a drive press jaw (30, 130, 230, 330) and with power transmission means (22, 222, 322), characterized by , - that the joint means (16, 116, 216, 250, 316) are designed as a hollow bolt (244) which centrally supports the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b) and is axially secured by means of a spring (248). [8] Press insert (10, 110, 210, 310, 410, 510) according to claim 7, characterized by , that the joint means (16, 116, 216, 250, 316) enable a pivotable attachment of the press insert (10, 110, 210) to a drive press jaw (30, 130, 230, 330). [9] Press insert (10, 110, 210, 310, 410, 510) according to claim 7 or 8, characterized by , that the power transmission means (22, 222, 322) are designed as contact surfaces (22a, 22b, 222a, 222b). [10] Press insert (10, 110, 210, 31, 410, 510) according to one of claims 7 to 9, characterized by , that the spring (48, 248) is intended for closing the press segments (12a, 12b, 112a, 112b, 212a, 212b). [11] 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), - where the press insert has (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 components (16, 116, 216, 250, 316) for connecting the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b), - Coupling means (18, 218, 318) for detachable connection with the drive press jaw (30, 130, 230, 330) and - Power transmission means (22, 222, 322), - wherein the drive press jaw has (30, 130, 230, 330): - 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 detachable connection with the press insert (10, 110, 210, 310, 410, 510) and - Power transmission elements (42, 242, 342), characterized by , - that the joint means (16, 116, 216, 250, 316) are designed as a hollow bolt (244) which centrally supports the press segments (12a, 12b, 112a, 112b, 212a, 212b, 312a, 312b) and is axially secured by means of a spring (248). [12] Press jaw according to claim 11, characterized by , - 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). [13] Press jaw according to claim 11 or 12, characterized by , that the spring (48, 248) is intended for closing the press segments (12a, 12b, 112a, 112b, 212a, 212b).

Images