Press Jaw, Drive Press Jaw, Press Insert and System for Pressing Fittings With Pipes

Abstract

The invention relates to a press jaw with a drive press jaw and a press insert which can be coupled and exchanged therewith, a drive press jaw with coupling elements, a press insert with coupling means which can be used as a press jaw insert or as a pressing sling, and system for pressing fittings with pipes with a modular structure with a press jaw, with at least two press inserts with different diameters and a pull insert, wherein the pull insert and the drive press jaw form a pull jaw. This solves 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.

Claims

1. A press jaw for pressing fittings with pipes, with a press insert and with a drive press jaw, wherein the press insert includes: at least two press segments, a press contour formed in the press segments, joint means for connecting the press segments coupling means for releasably connecting with the drive press jaw; and power transmission means, wherein the drive press jaw has: two drive press jaw halves, joint elements for connecting the drive press jaw halves, coupling elements for releasably connecting with the press insert and force transmission elements, wherein that the joint means pivotably connect the press insert to the drive press jaw, 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. The press jaw according to claim 1, wherein, that the force transmission means are formed as contact surfaces, that the force transmission elements are formed as contact surfaces, and that the contact surfaces in pairs have an angle (?) greater than 10?, preferably greater than 25?, in particular greater than 40?, particularly preferably greater than 80? to one another.

3. The press jaw according to claim 1, wherein, that the press insert and the drive press jaw halves are pivotable about a same axis.

4. The press jaw according to claim 1, wherein, that the press insert and the drive press jaw halves are pivotable about different axes, wherein the drive press jaw halves having an identical axis or different axes.

5. The press jaw according to claim 1, wherein, that the coupling means include coupling pins having head ends, and that the coupling elements have partially opened T-grooves and receive the coupling means.

6. The press jaw according to claim 1, wherein, that the coupling elements include coupling pins and that the coupling means include recesses and receive the coupling elements.

7. The press jaw according to 1, wherein, that the press insert is formed.

8. The press jaw according to claim 1, wherein, that the drive press jaw is formed.

9. 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 releasably connecting 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. wherein, that connecting elements are provided for pivotably connecting 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 connected and the joint means of the press insert to be connected.

10. The drive press jaw according to claim 9, wherein, that the force transmission elements are formed as contact surfaces, and that the contact surfaces have an angle (?) greater than 10?, preferably greater than 25?, in particular greater than 40?, particularly preferably greater than 80? to one another.

11. The drive press jaw according to claim 9, wherein, that the connecting elements and the joint elements have the same axis (axis of rotation)

12. The drive press jaw according to claim 9, wherein, that the connecting elements and the joint elements have different axes, the joint elements enabling the drive press jaw halves to pivot about a common axis or about different axes.

13. The drive press jaw according to claim 9, wherein, that the coupling elements for releasably receiving coupling means of the press insert have partially opened T-grooves, and that the force transmitting elements are formed as contact surfaces.

14. The drive press jaw according to claim 9, wherein, that the coupling elements include coupling pins.

15. A press insert for pressing fittings with pipes, with at least two press segments, with press contours formed in the pressing segments, with joint means for connecting the press segments, with coupling means for releasably connecting with a drive press jaw and with power transmission means, wherein, that the press segments include attachment means for attaching a pull jaw.

16. The press insert according to claim 15, wherein, that the attachment means in the press segments are formed as recesses for receiving pull means of the pull jaw.

17. The press insert according to claim 15, wherein, that the recesses enable the pull means to be applied at at least two, preferably several, different angles in relation to the axis of the pipe to be pressed.

18. The press insert according to claim 15, wherein, that the joint means enable the press insert to be pivotably attached to a drive press jaw.

19. The press insert according to claim 15, wherein, that the force transmission means are formed as contact surfaces.

20. The press insert according to claim 15, wherein, that the coupling means include coupling pins and that the coupling pins are provided with head ends.

21. The press insert according to claim 15, wherein, that the coupling means include recesses for releasably receiving coupling elements of the drive press jaw.

22. The press insert according to claim 15, wherein, that an elastic spring is provided for closing the press segments.

23. A system for crimping fittings with pipes, with at least two press inserts and with a drive press jaw, wherein the press inserts have: at least two press segments, press contours formed in the press segments, joint means for connecting the press segments, coupling means for releasably connecting with the drive press; and power transmission means, wherein the at least two press inserts have different press contours and wherein the drive press jaw has: two drive press jaw halves, joint elements for connecting the drive press jaw halves, coupling elements for detachably connecting with the press insert and, force transmission elements, wherein, that at least one press insert has attachment means for attaching a pull jaw, that a pull insert is provided and includes: two pull insert halves, joint means for connecting the pull insert halves, coupling means for releasably connecting with the drive press jaw, power transmission means and pull means opposite the joint means, wherein the coupling means and the force transmitting means are arranged on the outside of the pull insert halves, and that the pull insert and the drive press jaw form the pull jaw.

24. The system according to claim 23, wherein, that the pull means enable to be attached in the attachment means at at least two, preferably several, different angles in relation to the axis of the pipe to be pressed.

25. (canceled)

Description

DESCRIPTION OF THE INVENTION

[0096] In the following, the invention is explained by means of embodiments with reference to the drawing. The drawing shows

[0097] FIG. 1a-f a schematic representation of an embodiment of a system for pressing fittings with pipes,

[0098] FIG. 2a-c a first embodiment of a press jaw with a press insert and a drive press jaw,

[0099] FIG. 3a-b the press jaw according to FIG. 2 during the coupling process of the press insert with the drive press jaw,

[0100] FIG. 4a-b a drive press jaw of a press jaw according to FIG. 2,

[0101] FIG. 5a-d a press insert of a press jaw according to FIG. 2,

[0102] FIG. 6a-d a first embodiment of a pull insert, in particular for a system according to FIG. 1e and f,

[0103] FIG. 7a-c a second embodiment of a press jaw with a press insert and a drive press jaw,

[0104] FIG. 8a-c the press jaw according to FIG. 7 in the opened state,

[0105] FIG. 9a-b the press jaw according to FIG. 7 during the coupling process of the press insert with the drive press jaw,

[0106] FIG. 10a-b a drive press jaw of a press jaw according to FIG. 7,

[0107] FIG. 11a-d a press insert of a press jaw according to FIG. 7,

[0108] FIG. 12a-b a third embodiment of a drive press jaw,

[0109] FIG. 13a-b a press insert for a drive press jaw according to FIG. 12,

[0110] FIG. 14a-b a pull insert for a drive press jaw according to FIG. 12 and

[0111] FIG. 15 an embodiment of a system for pressing fittings with pipes.

DESCRIPTION OF THE INVENTION

[0112] 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 given the same reference signs, even if the components and elements may differ in dimension or shape in the various embodiments.

[0113] In the following, embodiments of a system according to the invention for pressing fittings with pipes are first explained with the aid of schematic illustrations. Subsequently, details of press jaws, drive press jaws, press inserts and pull inserts according to the invention are discussed on the basis of various embodiments.

[0114] FIGS. 1a to 1f show schematic illustrations of various embodiments of a system according to the invention for pressing fittings with pipes.

[0115] In FIGS. 1a to 1d, a press jaw including a drive press jaw and a press insert is shown schematically, with rotatably and fixedly mounted axes being indicated in order to illustrate the mode of operation of the interaction of drive press jaw and press insert.

[0116] In addition, FIG. 1d shows the angle ? of the contact surfaces to each other and the force effect of the force resultants during pressing is shown by means of a force diagram.

[0117] In FIGS. 1e and 1f, another press insert is shown and a pull jaw is also shown schematically in order to illustrate the functioning of the pull jaw in interaction with the press insert.

[0118] FIG. 1a first shows a first embodiment of a system 100 according to the invention for pressing fittings with pipes with a press jaw 2 including 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 including a drive press jaw 30 with two drive press jaw halves 32a, 32b and joint elements 36. The press insert 10 includes coupling means 18a, 18b, via which the press insert 10 is detachably connected to the drive press jaw 30. Furthermore, the press insert 10 has joint means 16 for connecting the press segments 12a, 12b, wherein the joint means 16 furthermore pivotably connect the press insert 10 to the drive press jaw 30.

[0119] Furthermore, the press insert 10 has force transmission means 22 and the drive press jaw 30 has force transmission elements 42a, 42b (shown schematically), which in the present case are arranged entirely in an area between the center of the press contour 14 and the joint means 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 engaging and cooperating with infeed contours 30a, 30b. As the rollers 31a, 31b are advanced, to the left in FIG. 1a, the drive press jaw halves 32a, 32b are forced apart so that the force transmission elements 42a, 42b and thus the press segments 12am 12b are pressed together. This results in the pressing of a fitting.

[0120] The axis of the press contour 14 is perpendicular to the side view and perpendicular to the paper plane, whereby the center of the press contour 14 corresponds to the axis of the press contour 14 and thus to the axis of the pipe to be joined (not shown). The orientation of the axis of the joint means 16 of the press insert 10 is also perpendicular to the horizontal orientation of the press jaw 2 and perpendicular to the paper plane.

[0121] 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 drawing plane perpendicular to the axis of the press contour 14 and perpendicular to the horizontal direction and a plane extending in the drawing plane perpendicular to the axis of the joint means 16 and perpendicular to the horizontal direction. By means of the coupling means 42a, 42b of the press insert 10, which are coupled to the coupling elements 18a, 18b of the drive press jaw 30 and which in the present case are formed as contact surfaces 22a, 22b, the press insert 10 is actuated by a movement of the drive press jaw 30. The press insert 10 can be opened by pressing the drive press jaw halves 32a, 32b together, the movement of the drive press jaw halves 32a, 32b being limited by the abuttment of the ends of the drive press jaw halves 32a, 32b (shown schematically) which ends being mounted by means of the joint elements 36 and are positioned opposite each other.

[0122] In the embodiment of the press jaw 2 shown in FIG. 1a, the press insert 10 and the drive press jaw halves 32a, 32b are arranged to pivot about the same 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, the joint means 16 and the joint elements 36 are thus arranged to rotate and pivot on the same axis 4a.

[0123] FIG. 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 arranged to pivot about different axes 4b, 6a, the drive press jaw halves 132a, 132b having a same axis 6a. Thus, an embodiment of the press jaw 102 with two axes 4b, 6a is indicated.

[0124] FIG. 1c shows an embodiment of a press jaw 202 in which the press insert 10 and the drive press jaw halves 232a, 232b are arranged to pivot about different axes 4b, 6b, 6c, the drive press jaw halves having different axes 6b, 6c. Thus, an embodiment of the press jaw 202 with three axes 4b, 6b, 6c is indicated.

[0125] FIG. 1d shows a press insert 10, whereby the force transmission from a drive press jaw (not shown) to the press insert 10 is shown by means of two arrows 8a, 8b. This force transmission 8a, 8b runs at an angle to each other and both arrows 8a, 8b are divided in FIG. 1d in a force parallelogram into the horizontal components 8a.sub.h, 8b.sub.h and the vertical components 8a.sub.v, 8b.sub.v.

[0126] The force generated by the force transmission means 22a, 22b and by 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.sub.v, 8b.sub.v. The two horizontal components 8a.sub.h, 8b.sub.h result in a force 8c, from the position of the joint means 16, directed away from the schematically shown bearing of the press insert 10.

[0127] The force resultant 8c as a linear force component is balanced by the bearing of the press insert 10 relative to a drive press jaw (not shown). This leaves the vertical force components 8a.sub.v, 8b.sub.v directed towards each other.

[0128] The force transmission means 22, which are formed as flat contact surfaces 22a, 22b, have an angle ? relative to one another, the angle ? being measured between two planes 26a, 26b associated with the contact surfaces 22a, 22b. An angle ? of 0? means contact surfaces 22a, 22b arranged parallel to each other. An angle ? of greater than 80? is shown here.

[0129] FIGS. 1e and 1f now show further elements of the system for pressing fittings with pipes with a press insert 110 having 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 one another via joint means 116. The press insert 110 further includes attachment means 128a, 128b, 128c, 128d (128 in the following) for a pull jaw 60, so that by means of the pull means 74a, 74b of the pull jaw 60 (only schematically shown), a fitting can be pressed by compressing the press insert 110. FIGS. 1e and 1f show two possibilities of such pressing, in which the press insert 110 is used as a press loop. The press insert 110 is not supported or otherwise connected to the drive press jaw, as shown in FIGS. 1a to 1d.

[0130] First, FIG. 1e shows a press insert 110 with attachment means 128 in the form of recesses 128a, 128b arranged on the outside of the press segments 112a, 112b in front of the center of the press insert 110 as viewed from the joint means 116.

[0131] FIG. 1f shows a press insert 110 with attachment means 128 in the form of recesses 128c, 128d, which are arranged on the outside of the press segments 112a, 112b, viewed from the joint means 116, behind the center of the press insert 110. Thus, in this case, the attachment means 128 are located where the press insert 110 can be opened to be positioned on a fitting prior to pressing. The opened section is then compressed by the pull jaw 60 and the fitting is pressed.

[0132] The attachment means 128a, 128b can also be formed as coupling means cooperating with the coupling elements of a drive press jaw. In this case, the attachment means 128a, 128b serve to transmit force both when a press insert 110 is used in its function as a press jaw insert and when it is used in its function as a press sling.

[0133] FIGS. 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. 2b shows the press jaw 2 in a lateral sectional view in closed state and FIG. 2c in a lateral sectional view in open state.

[0134] 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 support the two drive press jaw halves 32a, 32b so that they can pivot about the common axis 4a. The hollow bolts 46a, 46b can also be seen in FIGS. 4a and 4b. Retaining lugs 50a, 50b are provided for retaining and connecting the drive press jaw halves 32a, 32b. A drive mechanism 54 in the form of a double roller plunger with two rollers 56a, 56b is connected to the retaining brackets 50a, 50b, whereby the drive mechanism 54 forms an operative connection with a press tool (not shown). The rollers 56a, 56b interact with an inlet contour of the drive press jaw halves 32a, 32b, which is not shown, as described above.

[0135] During pressing, the fitting to be pressed (not shown) is received and at least partially deformed by the press segments 12a, 12b or the press contour 14 of the press insert 10, the deformation being influenced by the design of the press contour 14. The two press segments 12a, 12b are connected to one another via joint means 16, the joint means 16 being in the form of a hollow pin 44 supporting both press segments 12a, 12b. An elastic spring 48 is used to close the press segments 12a, 12b.

[0136] 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-grooves 38a, 38b, the coupling pins 18a, 18b engaging in the coupled state in the undercuts formed by the T-grooves 38a, 38b. The force transmission elements 42 of the drive press jaw 30 are formed as abutment surfaces 42a, 42b which abut the force transmission means 22 of the press insert 10 formed as abutment surfaces 22a, 22b. When a fitting is pressed, the press insert 10 is compressed by the force generated by the press tool being transmitted to the press insert 10 via the force transmission elements 42 and the force transmission means 22.

[0137] Likewise, the contact surfaces 42a, 42b have an angle ? relative to each other, the angle ? being measured between two planes 45a, 45b associated with the contact surfaces 42a, 42b. An angle ? of greater than 80? is shown. In the closed state of the drive press jaw 30 with coupled press insert 10 shown in FIG. 2b, it can be seen that the angle between the contact surfaces 22a, 22b corresponds to the angle between the contact surfaces 42a, 42b.

[0138] Due to the coinciding axes of rotation, the force transmission means do not slide on the force transmission elements in an advantageous manner during pressing, so that frictional losses are minimised or even avoided during the transmission of force from the drive press jaw 30 to the press insert 10. By omitting the sliding movement, the T-grooves 38a, 38b serving as coupling elements 38 can be made shorter compared to the shapes of T-grooves serving as coupling elements in press jaws in which sliding of the force transmission means on the force transmission elements occurs during pressing, so that the coupling process of the press insert 10 with the drive press jaw 30 is simplified.

[0139] In this embodiment, the press insert 10 and the drive press jaw 30 of the press jaw 2 can be pivoted about a common rotation axis 4a. For this purpose, a hollow pin 44 supporting both press segments 12a, 12b of the press insert 10 is arranged between the two hollow pins 46a, 46b supporting 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 rotation axis 4a. The locking pin 50 thus serves to pivotally connect the press insert 10 to the drive press jaw 30 and also pivotally supports the drive press jaw halves 32a, 32b. The connecting elements 52, which pivotably connect the press insert to the drive press jaw 30, are therefore formed as hollow bolts 44, 46a, 46b and locking bolts 50.

[0140] Furthermore, the press insert 10 has attachment means 28 in the form of rotationally symmetrical recesses 28a, 28b, in which the pull means of a pull jaw 60 (see schematic in FIGS. 1e and 1f) can engage. The press insert 10 can thus also be used as a press loop. This makes it possible to press fittings in areas of the installation that are difficult to access, for example in room corners. This results in the advantageous design of the suitability of the press insert 10 both in connection with a drive press jaw 30 as a press jaw insert and also as a press loop in connection with a pull jaw 60, as shown in connection with FIGS. 1e and 1f.

[0141] In FIGS. 3a and 3b, the press jaw according to FIGS. 2a-c is shown during the coupling process of the press insert 10 with the drive press jaw 30 in a lateral sectional view (FIG. 3a) and in a perspective view (FIG. 3b). First, the press insert 10 is inserted into the drive press jaw 30 in a slightly pivoted position so that the head ends 24a, 24b of the coupling pins 18a, 18b engage in the openings of the T-grooves 38a, 38b (FIG. 3a). By turning the press insert 10 back into the position of the drive press jaw 30 (shown horizontally in the present case), the coupling pins 18a, 18b engage in the undercut of the T-grooves 38a, 38b. If the opening of the hollow pin 44 is congruent with the openings of the hollow pins 46a, 46b of the drive press jaw 30, the locking pin 50 can be inserted.

[0142] In FIGS. 4a and 4b a drive press jaw 30 of a press jaw 2 according to FIG. 2 is shown in a perspective view and in a side view. The locking pin 50 (shown in FIG. 2 and FIG. 3), which is arranged as a common rotation axis 4a, is enclosed both by the hollow pins 46a, 46b of the drive press jaw halves 32a, 32b and by the retaining lugs 50a, 50b (see FIG. 2).

[0143] The drive press jaw halves 32a, 32b each have undercut recesses in the form of a partially open T-groove 38a, 38b 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 a mechanical play between the coupling pins 18a, 18b and the T-grooves 38a, 38b. This enables the press insert 10 and the drive press jaw 30 to slide easily against each other during pressing. The force transmission elements 42 are formed as flat contact surfaces 42a, 42b.

[0144] FIGS. 5a to 5d show a press insert 10 of a press jaw according to FIG. 2, wherein FIG. 5c shows a sectional view through the sectional axis Vc indicated in FIG. 5b and wherein FIG. 5d shows the top view of the side of the press insert 10 having the joint means 16 indicated in FIG. 5b by the direction Vd.

[0145] In the view shown in FIGS. 5a and 5b, the force transmission means 22 of the press insert 10, formed 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 in FIG. 4, which are also formed as contact surfaces 42a, 42b, enable a two-dimensional force transmission independent of the coupling. Furthermore, the design as partially open T-grooves 38a, 38b enables a particularly smooth insertion of the press insert 10 into the drive press jaw 30 and thus simplifies the handling of the press tool.

[0146] With reference to the illustration shown in FIGS. 5c and 5d, the spring 48 is shown which pulls the press segments 12a, 12b of the press insert 10 against each other and thus serves to close the press insert10. Retaining rings 43a, 43b are provided to secure the hollow bolt 44 axially.

[0147] FIGS. 6a to 6d show a first embodiment of a pull insert 72, in particular for a system according to FIG. 1e and FIG. 1f, wherein FIG. 6c shows a sectional view through the sectional axis VIc drawn in FIG. 6b and wherein FIG. 6d shows the top view of the side of the pull insert 70 having the joint means 76 indicated from direction VId in FIG. 6b. 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 FIG. 6). Thus, the pull insert 70 and the drive press jaw 30 act together as one pull jaw 60, as shown schematically in FIGS. 1e and 1f. 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 formed opposite the joint means 76, which engage in the attachment means 28 of a press insert 10 (not shown in FIG. 6). The pull insert 70 and the drive press jaw 30 thus act together as a pull jaw 60 (see schematic FIGS. 1e and 1f) and press the press insert 10 radially inwards. In this case, the press insert 10 serves as a press loop and pressing of fittings in working areas that are difficult to access or spatially limited is simplified.

[0148] The force transmission means 82 of the pull insert 70, which are formed as contact surfaces 82a, 82b, together with force transmission elements of a drive press jaw (not shown), which are also formed as flat contact surfaces, enable a two-dimensional force transmission, which 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 in the same way as the coupling of a press insert 10 with a drive press jaw 30.

[0149] The joint means 76 are formed as a hollow pin 94 which pivotally supports the two pull insert halves 72a, 72b. A spring 88 serves to close the pull insert 70 by pulling the two pull insert halves 72a, 72b against each other. Retaining rings 73a, 73b are provided to secure the hollow bolt 94 axially.

[0150] FIGS. 7a to 7c show 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, in closed state. FIG. 7a shows a perspective view of the press jaw 202, whereas FIG. 7b shows a lateral view and FIG. 7c a lateral sectional view.

[0151] In contrast to the embodiment shown in FIG. 2, the press jaw 202 here has different rotation axes 4b, 6b, 6c for the press insert 210 and the drive press jaw halves 232a, 232b, with the drive press jaw halves 232a, 232b having different axes 6b, 6c. This embodiment thus 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, which is shown empty here, serves for connection to a press tool (not shown).

[0152] By providing different axes around which the press insert 210 and the drive press jaw halves 232a, 232b are pivotably mounted, the overall thickness of the press jaw 202 can be reduced and the overall construction can be made simpler. Due to the simpler design, the production of the drive press jaw 230 is less complex and thus more cost-effective.

[0153] In this embodiment of a press jaw 202, the press insert 210 also has press segments 212a, 212b or rather a press contour 214 for receiving the fitting to be pressed. The two press segments 212a, 212b are connected to each other via joint means 216, wherein the joint means 216 are formed as a hollow bolt 244 supporting both press segments 212a, 212b and axially secured by means of 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 and explained further below.

[0154] In this way, the joint of the press insert 210 can be narrow, in particular narrower than in the case of comparable securing with the aid of retaining rings as in the previously described embodiments of a press 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 in bearings, is also correspondingly narrow. Overall, the entire construction can thus be formed to be more space-saving, making it easier to work in narrow places that are difficult to access.

[0155] The spring 248 additionally pulls the two press segments 212a, 212b against each other. Furthermore, the press insert 210 has rotationally symmetrical recesses 228a, 228b as attachment means by means of which the press insert 210 can be used as a press sling in conjunction with a pull jaw 60 (see schematic in FIGS. 1e and 1f). A locking bolt 250 secures the pivotable mounting of the press insert 210 on the hollow bolt and at the same time 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.

[0156] 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-grooves 238a, 238b. The force transmission elements 242 of the drive press jaw 230 are formed as abutment surfaces 242a, 242b which abut on the force transmission means 222 of the press insert 210 formed as abutment surfaces 222a, 222b.

[0157] When a fitting is pressed, the press insert 210 is compressed by transmitting the force generated by the press tool (not shown) to the press insert 210 via the force transmission elements 242 and the force transmission means 222.

[0158] In the present case, the shape of the press insert 210 differs from the press inserts 10, 110 described above in that the portions of the outside of the press segments 212a, 212b which lie between the coupling means 222 are of round construction, so that these portions of the press segments 212a, 212b lie on the radius of a common circle in the closed state of the press insert 210.

[0159] In FIGS. 8a to 8c, the press jaw 202 according to FIG. 7 is shown in an open state, whereby FIG. 8a shows a perspective view, FIG. 8b a lateral view and FIG. 8c a lateral sectional view. Opening of the press jaw 202 and thus of 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.

[0160] FIGS. 9a and 9b now show, in combination with FIGS. 10a and 10b, the press jaw 202 according to FIGS. 7a to 7c during the coupling process of the press insert 210 with the drive press jaw 230. In FIGS. 10a and 10b, the drive press jaw 230 according to FIGS. 7a to 7c is shown without the inserted press insert 210 in a perspective view and in a lateral view.

[0161] 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.

[0162] The round shaped portions of the press segments 212a, 212b, between the coupling means 218 of the press insert 210, enable the pivoting movement of the press insert 210 to couple the coupling means 218 into the coupling elements 238 to occur on a circular path without first pivoting the press insert 210 from the horizontal position of the drive press jaw 230. Such handling is easier for a user to implement, thereby improving the coupling of the press insert 210 into the drive press jaw 230.

[0163] If the opening of the hollow pin 244 of the press insert 210 is congruent with the bearing eye 300 of the side plate 276 provided for the bearing of the press insert 210 (FIGS. 10a and 10b), the locking pin 250, which represents the rotation 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.

[0164] According to FIG. 10a and FIG. 10b, the drive press jaw 230 has coupling elements 238 in the form of partially open T-grooves 238a, 238b having undercuts and further has force transmission elements 242 in the form of contact surfaces 242a, 242b. In this case, the T-grooves 238a, 238b are longer than the T-grooves 38a, 38b in order to ensure coupling of the press insert 210 during the entire opening movement of the drive press jaw 230.

[0165] FIGS. 11a-d show the press insert 210 of the press jaw according to FIG. 7, wherein FIG. 11c shows a sectional view through the sectional axis XIc indicated in FIG. 11b and wherein FIG. 11d shows the top view of the side of the press insert 210 having the joint means 216 indicated in FIG. 11b through the direction XId.

[0166] In the perspective view shown in FIG. 11a and the sectional view shown in FIG. 11b, the force transmission means 222 of the press insert 210, which are formed as contact surfaces 222a, 222b, are clearly visible. These contact surfaces 222a, 222b and force transmission elements 242 of the drive press jaw 230, which are also formed as contact surfaces 242a, 242b, enable a two-dimensional force transmission independently of the coupling of the press insert 210 to the drive press jaw 230. During the force transmission, the outer side of the press segments 212a, 212b slides along the contact surfaces 242a, 242b and, by means of a force coupling into the press insert 210, causes pressing of the fitting with a pipe to be pressed.

[0167] The force transmission means 222 formed as contact surfaces 222a, 222b can be assigned a plane 226a, 226b so that an angle ? can be defined between the planes 226a, 226b. An angle ? of greater than 25? (measured with the aid of the planes 227a, 227b running parallel to the planes 226a, 226b) is shown here.

[0168] Referring to the illustration shown in FIGS. 11c and 11d, the spring 248 that axially secures the hollow pin 244 is shown.

[0169] FIGS. 12a and 12b and FIGS. 13a and 13b show a third embodiment of a press jaw 302 including a drive press jaw 330 (FIG. 12) and a press set 310 (FIGS. 13a and 13b).

[0170] FIGS. 12a and 12b first show a third embodiment of a drive press jaw 330, which has two drive press jaw halves 332a, 332b, which in the present case are mounted pivotably about a common axis 4a. Furthermore, the drive press jaw 330 has coupling elements 338 in the form of coupling pins 338a, 338b for releasably connecting with corresponding coupling means 318 of a press insert 310. The plates 350a, 350b, 351a, 351b of the drive press jaw 330 have circular openings for receiving joint means, for example hollow bolts and a locking bolt, for releasably connecting the drive press jaw 330 to the press insert 310. The press insert 310 is mounted about the same pivotable axis 4a as the drive press jaw 330.

[0171] In FIGS. 13a and 13b, the press insert 310 is now shown 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, in which the pull means 74a, 74b of a pull jaw 60 engage, as well as joint means 316 in the form of a hollow pin 344, whereby the hollow pin 344 supports the press insert 310 pivotably about the axis 4a common to the drive press jaw 330.

[0172] The press insert 310 further includes coupling means 318 for releasably receiving the coupling elements 338 of the drive press 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 by abutment during the coupling process of the press insert 310 with the drive press jaw 330.

[0173] The coupling pins 338a, 338 are provided for this purpose on two opposing inner sides 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 sides of the press segments 312a, 312b of the press insert 310. The recesses 318a, 318b are arranged entirely in an area between the center of the press contour 314 of the press insert 310 and the joint means 316 of the press insert 310 and in a direction perpendicular to the horizontally aligned drive press jaw 330 with connected press insert 310 (see FIG. 15) above and below the joint means 316 of the press insert 310.

[0174] Such a configuration of the recesses 318a, 318b results in a respective projection 319a, 319b in a 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.

[0175] The coupling process as well as the force transmission between the drive press jaw 330 and the press insert 310 is carried out analogously to the first embodiment of a press jaw 2 with drive press jaw 30 and press insert 10 already illustrated with reference to FIGS. 2 to 4. 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 formed as contact surfaces. The joint means of the drive press jaw 330 may also be so formed in the form of hollow pins. Thus, a locking pin can be pushed through both the hollow pins of the drive press jaw 330 and the hollow pin 344 of the press insert 310 after the coupling process. In this way, the locking pin secures the connection of the drive press jaw 330 and the press insert 310 and forms the common rotation axis 4a of the drive press jaw 330 and the press insert 310.

[0176] FIGS. 14a and 14b show an embodiment of a pull insert 370, in particular for connection to a drive press jaw 330 according to FIG. 12. The joint means 376 serve to connect the pull insert halves 372a, 372b. Further, coupling means 378 are provided for releasably connecting to the drive press jaw 330, here in the form of recesses 378a, 378b. The coupling means 378 come into contact with the coupling elements 338 of the drive press jaw 330, formed as coupling pins 338a, 338b, by engaging behind the coupling pins 338a, 338b.

[0177] The pull insert halves 372a, 372b each have pull means 374a, 374b opposite the joint means 376. The press insert 10, 110, 210, 310 can be pressed with the aid of the pull means 374a, 374b, which engage in the attachment means 28, 128, 228, 328 of a press insert 10, 110, 210, 310 (not shown in FIG. 14), and a drive press jaw 330 as shown in FIG. 12. In this case, the press insert 10, 110, 210, 310 serves as a press loop and pressing of fittings in working areas that are difficult to access or limited in space is simplified.

[0178] In this way, the coupling elements 338 of the drive press jaw 330 can be used for detachable connection on the one hand with a pull insert 370 as a pull jaw 60 (as schematically shown in FIGS. 1e and 1f) and on the other hand with a press insert 310 as a press jaw 302. This reduces the number of tools that have to be kept on site for pressing fittings with pipes and simplifies the pressing process.

[0179] The force transmission from the drive press jaw 330 to the pull insert 370 is effected analogously to the preceding embodiments of the press jaws 2, 102, 202, 302, by means of force transmission elements 342 of the drive press jaw 330 and force transmission means 382 of the pull insert 370. The joint means 376 of the pull insert 370 are formed as a hollow pin 394 which supports the two pull insert halves 372a, 372b pivotably about a common rotation axis 4a. The rotation axis 4a is a rotation axis 4a common to the drive press jaw halves 332a, 332b, so that the joint means 376 of the pull insert and the joint means of the drive press jaw are pivotably mounted on the same axis.

[0180] FIG. 15 shows an embodiment of a system 400 for pressing fittings with pipes, wherein the system 400 includes a pull insert 370 according to FIG. 14, a first press insert 310 according to FIG. 13, a second press insert 410, a third press insert 510 as well as a drive press jaw 330 according to FIG. 12 and further a press tool 404. The press inserts 310, 410, 510 each have different press contours 314, 414, 514, in particular for different press dimensions, for example with outer dimensions of 12, 18 and 35 mm.

[0181] The press tool 404 is releasably connected to the drive press jaw 330 by means of a locking pin 450. Advantageously, the drive press jaw 330 can be releasably connected to one of the press inserts 310, 410, 510 or to the pull insert 370 by means of the coupling elements 338, so that both a press jaw and a pull jaw can be provided by means of the same drive press jaw 330. In the present case, a press insert 410 is detachably connected to the drive press jaw 330, so that pressing of fittings with pipes can be performed with the press insert 410 and by means of a force generated by the press tool 404 and transmitted to the press insert 410 by the drive press jaw 330.