EP3231528B1 - Pressing device with a bolt fixing - Google Patents

Description

TECHNICAL AREA

The present invention relates to a pressing device, in particular for radial compression, in particular of pipe fittings according to the preamble of claim 1.

STATE OF THE ART

Pressing devices are known from the prior art. For example, the EP 2 340 899 such a pressing device. A pressing device is in DE 10 2008 003723 A1 disclosed.

In the pressing device after the EP 2 340 899 Two levers act on press jaws. The levers are articulated to a pressing jaw carrier and communicate with it via a bolt in each case. The pressing jaw is designed to be pivotable about the bolt relative to the pressing jaw carrier. The bolt after the EP 2 340 899 is held by a screw and two lids in the press jaw carrier.

Also, press devices have become known in which the bolt is held by releasable retaining rings in the die backing.

These security elements entice the user in the event of a malfunction of a pressing lever to replace it with a new still unused or by a different worn lever. This replacement has several disadvantages. On the one hand it comes through the different wear, which the expert does not necessarily visually recognize, to Fehlverpressungen. Especially when pressing fittings in connection with water pipes, this is very disadvantageous and leads to leaky connections.

On the other hand, it can happen due to the improper replacement of the one lever that cancel during the pressing process parts of the tool and fly away due to the prevailing forces such as bullets from the pressing device, which represents a significant accident risk for the installer.

PRESENTATION OF THE INVENTION

Based on this prior art, the invention has for its object to provide a pressing device which overcomes the disadvantages of the prior art. In particular, the invention has for its object to provide a pressing device, which is safer to handle.

This object is achieved by the subject matter of claim 1. Accordingly, a pressing device comprises at least one support element with at least one support opening, at least one pressing element with at least one bearing opening for applying a pressing force on a compact, wherein the at least one pressing element is mounted pivotably about at least one pivot axis on the support element , wherein in each case one of the bearing and the pivot axis providing bolts extending through the at least one support opening and the bearing opening therethrough. The bolt is secured at the end with a non-releasable securing element with respect to an axial displacement to the carrier element in the bearing opening and the carrier opening. The securing element has a limited by an inner wall interior space for receiving the bolt end, wherein in the interior at least one on the bolt end, in particular on the lateral surface of the bolt end, acting securing part is arranged.

By the securing element, the bolt is thus held in the pressing device. Since this is a non-releasable securing element, a removal or replacement of the bolt is prevented, whereby the above-mentioned disadvantages are avoided. In particular, a pressing device with permanently assembled individual parts is provided in this way, which can not be opened after the initial assembly. Craftsmen or third parties are involved prevented from opening the at least one pressing element, which can be avoided in consequence Fehlverpressungen and personal injury. This ensures a high level of security.

The term "non-detachable" is understood in particular that the securing element can be separated only with increased effort with the help of the securing element or the bolt destructive or damaging tools.

Preferably, the securing element is not destructively releasable. That is, should the fuse element be removed from the bolt, this is necessarily associated with a destruction of the fuse element. A disassembly of the fuse element and any demolition of the fuse element on the bolt are therefore not possible.

In a first aspect, the pressing device preferably has the shape of a pressing sling, wherein both the pressing element and the carrier element has the shape of a loop part, with which a pressing force can be applied to a compact, or the pressing device preferably has the shape of a press sling the pressing element has the shape of a loop part, with which a pressing force can be applied to a compact, and wherein the carrier element is an element connecting two loop parts. The carrier element may preferably be designed such that it exerts a pressing force on the compact in a compression similar to the pressing element. This means that the carrier element can also fulfill a pressing function.

Such a press sling thus enables a pressing of in particular tubular workpieces, which are inserted through a cylindrical opening portion of the press sling in this and thereby enclosed by this. The loop parts of the press sling are preferably to be understood as meaning a plurality of links which are hingedly connected to one another and define the cylindrical opening region of the press sling. The loop parts can thus be connected to each other in such an articulated manner that the press loop is substantially cylindrical or annular in cross-section. The sling parts can be connected to each other throughout and one form completely closed press loop without interruption, or it may for example be provided between two loop parts, the end parts, a distance to form a closing point.

In a further aspect, the pressing element is preferably designed in the form of an intermediate jaw having two bearing openings and in particular connectable to a pressing sling and the carrier element has two carrier openings, wherein the bolt extends through in each case one of the carrier openings and the bearing openings.

Thus, it may also be a preferably multi-membered or -teilige press sling, which has a plurality of pivotally interconnected pressing elements. These pressing elements can be placed around preferably tubular workpieces. At the open end of the press loop, i. at the closure, then can e.g. a (pre) compression device in the form of the intermediate jaw are set, with the help of a complete closure of the press loop and thus the compression can be effected.

In a further aspect, two pressing elements are preferably arranged in the form of pressing levers and the carrier element has two carrier openings, wherein the bolt extends through in each case one of the carrier openings and the bearing openings.

Preferably, the two pressing elements are arranged between two mutually spaced support elements, wherein each of the support elements each having two bearing openings.

The two pressing levers preferably have at least two pressing jaws for applying the pressing force to the pressed article, and the pivoting axes lie parallel to one another, whereby one pressing lever is pivotable about the one pivot axis and the other pressing lever about the other pivoting axis from a starting position into a pressing position at the end of the pressing process, the pressing jaws together as seen along the pivot axes form a substantially closed circle.

It is conceivable that the press sling has at least one press insert for applying the pressing force to the compact. This press insert may be arranged in an inner surface of the press sling such that it comes to lie on the outer surface of the workpiece to be pressed, in particular tubular, for the pressing process and thereby exerts an additional pressing force on the compact.

The securing element can be a securing element placed on the bolt end, which encloses the bolt end at least partially, preferably completely.

So it is conceivable that the fuse element z. B. cap-shaped or annular, wherein in the interior of the bolt end is added. This means that in a first variant, the securing element may have the shape of an end cap which completely accommodates and encloses the pin end, or the securing element may, in a second variant, have the shape of a terminating ring which surrounds the outside of the pin end.

The securing part could be a spring ring, which is placed in a circumferential groove in the inner wall, which spring ring engages in a circumferentially extending around the bolt around recess. For example, this could be a completely closed spring ring which extends completely in the groove of the securing element and thus extends completely around the bolt end when the bolt end is received. However, the spring ring could also have an interruption, so that it does not extend completely when receiving the bolt end, but only partially around the recorded bolt end. It can completely resp. interrupted spring ring are placed in the groove before attaching the end cap or end ring, so that when attaching the end cap or end ring at the bolt end of this spring ring engages in the recess at the bolt end or snaps into this. A spring washer with interruption can be easier to install compared to a continuously closed spring washer.

It is also conceivable that the securing part are a plurality of projecting from the inner wall in the interior tabs, which at a release force on the Fuse element act as a barb, or that the securing part is a toothed disc.

The above-mentioned securing parts bring in particular the advantage that they allow a stronger connection between the securing element and the bolt and thereby cause an additional safeguard concerning an unintentional release of the securing element from the bolt.

Preferably, the inner wall completely surrounds the parts of the bolt protruding from the carrier element. That is, the fuse element is formed, for example, as an end cap, the inner wall of the end cap takes on the protruding parts of the bolt end so completely on that no parts of the bolt uncovered resp. stay detached.

Preferably, the securing element on the outside has an outer wall, which is formed around the pivot axis about frustoconical, in particular such that the outer wall is not or can not be effectively handled by a forceps-like tool.

In the case of a securing element in the form of the end cap or of the end ring, this has an outer wall, which, starting from the carrier element in the direction of the bolt ends, increasingly tapers. In other words, the outer wall of the end cap or of the end ring is then designed such that the entire or partial surface of the outer shape along said direction would have an angle to the contact surface of less than 90 degrees.

The outer wall of the securing element may be formed around the pivot axis with a rounding around. In particular, the rounding in cross section may be formed as a one- or multi-part arc, wherein the single or multi-part arc has a center or centers, which or starting from the support element in the direction of the bolt end seen proximal to the support element and the bolt end spaced apart.

It is also conceivable that the outer wall consists of a combination of the above-mentioned embodiments, that is, the outer wall both frusto-conical as well as a round which is formed, for example in cross-section as a one- or multi-part arc around said pivot axis around.

Such a design of the outer wall, individually or in combination, leads, as mentioned, to the fact that the outer wall is not or can not be effectively grasped by a forceps-like tool by the tool z. B. slipping on the outer wall. As a result, removal of the securing element or bolt can be made even more difficult or completely prevented.

Preferably, a preferably identical non-releasable securing element is arranged on both sides of the bolt in each case. Alternatively, the bolt is formed on one side with an integrally formed bolt end, wherein the integral bolt end has a diameter which is greater than the diameter of the bolt, and wherein on the other side of said non-releasable securing element is arranged.

That is, all of the above embodiments relating to the non-releasable securing element may refer to only one such securing element at one of the bolt ends, while the other end of the bolt may be formed by an integrally formed, i.e. integrally formed bolt end has an enlarged diameter. Instead, it is also possible that the bolt has at its two bolt ends in each case via a securing element according to the above statements.

According to one example, it is preferred that the bolt has an integrally formed bolt end with an enlarged diameter at both bolt ends.

Preferably, the securing element is provided by deformation of the bolt end flange.

By this, for example, a one-piece rivet bolt can be understood, which is riveted on one or both sides. Such a deformation of the bolt end can be achieved for example by means of a cold forming process, in which a forming force only on a partial surface of the bolt, so here on the bolt end acts. The person skilled in the art is also familiar with this type of manufacturing method by the term tumbling. For example, the bolt can be manufactured as a so-called wobble rivet, whereby the parts of the rivet bolt which do not protrude beyond the carrier element come to lie at a distance from the inner surfaces of the carrier or bearing openings in the pressing device. But there are also other forming techniques conceivable to a bolt with flange, respectively. a slightly protruding rivet bolt to manufacture.

The carrier openings preferably have in the region of the flange in each case a diameter widening for receiving the flange, in which the flange comes at least partially to lie, and / or the flange in the deformed state preferably has a diameter which by up to 20%, in particular to 10% larger than the diameter of the bolt.

The support openings can thus in the region of the flange each have a diameter expansion, for example in the form of a recess which is complementary to the flange and in which the flange comes to rest at least partially or completely.

It is preferable that the bolt is made of a tool steel having a compressive strength of 800 to 2,000 Newton per square millimeter in the tempered state and / or an elongation at break of 5 to 15%, or that the bolt is made of a high-alloyed steel having a compressive strength of 800 to 2,000 Newton per square millimeter in the tempered state and / or an elongation at break between 5 to 15%.

These tool properties, for example, allow a defined application in the above-mentioned forming techniques, whereby a coordinated formation of the flanges can be obtained at the bolt ends.

The bolt may be formed as a hollow bolt with a bolt opening passing in the direction of the pivot axis, or the bolt may have a full cross section over its entire length.

According to a second embodiment, the bolt can have at one end of the bolt an integrally formed bolt end with enlarged diameter according to the example, and at the other bolt end via an attached securing element according to the first or second variant of the first embodiment, that is, for example, via an end cap or a End ring, dispose. In other words, this third embodiment thus corresponds to a mixture of the fuse elements according to the first embodiment and the said example.

Further embodiments are given in the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1

eine perspektivische Explosionsdarstellung einer Pressvorrichtung mit einer Bolzenfixierung nach einer Ausführungsform der vorliegenden Erfindung;

Fig. 2

eine perspektivische Ansicht einer Pressvorrichtung gemäss Figur 1;

Fig. 3

eine Detailansicht des Details I von Figur 2;

Fig. 4

eine Ansicht der Pressvorrichtung nach einer der vorhergehenden Figuren 1-2;

Fig. 5

eine Schnittdarstellung der Pressvorrichtung nach Figur 4 entlang der Schnittebene A-A;

Fig. 6

eine perspektivische Explosionsdarstellung einer Pressvorrichtung mit einer Bolzenfixierung nach einer weiteren Ausführungsform der vorliegenden Erfindung;

Fig. 7

eine perspektivische Ansicht einer Pressvorrichtung gemäss Figur 6;

Fig. 8

eine Detailansicht des Details II von Figur 7;

Fig. 9

eine Detailansicht des Details III von Figur 7;

Fig. 10

eine Ansicht der Pressvorrichtung nach einer der vorhergehenden Figuren 6-7;

Fig. 11

eine Schnittdarstellung der Pressvorrichtung nach Figur 10 entlang der Schnittebene B-B;

Fig. 12

eine perspektivische Explosionsdarstellung einer Pressvorrichtung mit einer Bolzenfixierung nach einer weiteren Ausführungsform der vorliegenden Erfindung;

Fig. 13

eine perspektivische Ansicht einer Pressvorrichtung gemäss Figur 12;

Fig. 14

eine Detailansicht des Details IV von Figur 13;

Fig. 15

eine Ansicht der Pressvorrichtung nach einer der vorhergehenden Figuren 12-13;

Fig. 16

eine Schnittdarstellung der Pressvorrichtung nach Figur 15 entlang der Schnittebene C-C;

Fig. 17

eine perspektivische Ansicht einer Pressvorrichtung gemäss einer weiteren Ausführungsform;

Fig. 18

eine perspektivische Ansicht einer Pressvorrichtung gemäss einer weiteren Ausführungsform.

Preferred embodiments of the invention will be described below with reference to the drawings, which are given by way of illustration only and are not to be interpreted as limiting. In the drawings show:

Fig. 1

an exploded perspective view of a press device with a bolt fixation according to an embodiment of the present invention;

Fig. 2

a perspective view of a pressing device according to FIG. 1 ;

Fig. 3

a detail view of the detail I of FIG. 2 ;

Fig. 4

a view of the pressing device according to one of the preceding Figures 1-2 ;

Fig. 5

a sectional view of the pressing device according to FIG. 4 along the cutting plane AA;

Fig. 6

an exploded perspective view of a pressing device with a bolt fixing according to another embodiment of the present invention;

Fig. 7

a perspective view of a pressing device according to FIG. 6 ;

Fig. 8

a detailed view of the detail II of FIG. 7 ;

Fig. 9

a detailed view of the detail III of FIG. 7 ;

Fig. 10

a view of the pressing device according to one of the preceding Figures 6-7 ;

Fig. 11

a sectional view of the pressing device according to FIG. 10 along the section plane BB;

Fig. 12

an exploded perspective view of a pressing device with a bolt fixing according to another embodiment of the present invention;

Fig. 13

a perspective view of a pressing device according to FIG. 12 ;

Fig. 14

a detailed view of the detail IV of FIG. 13 ;

Fig. 15

a view of the pressing device according to one of the preceding FIGS. 12-13 ;

Fig. 16

a sectional view of the pressing device according to FIG. 15 along the cutting plane CC;

Fig. 17

a perspective view of a pressing device according to another embodiment;

Fig. 18

a perspective view of a pressing device according to another embodiment.

DESCRIPTION OF PREFERRED EMBODIMENTS

In the FIGS. 1 to 5 A preferred embodiment of a pressing device 1 with a bolt fixation according to the invention is shown. In this case, the pressing device is shown with two pressing elements in the form of pressing levers according to an inventive aspect. However, it should be understood that the further inventive aspects of the pressing device in the form of the press loop, as in FIG. 17 shown, and / or in the form of the intermediate jaw, as in FIG. 18 shown, which is connectable to the press sling, are also conceivable, and that the following explanations therefore also refer to these other aspects.

Like from the FIGS. 1 . 2 and 4 As can be seen, the pressing device 1 comprises two pressing levers 5, 5 ', two pressing jaws 4, 4' and a support element 2. The support element 2 is here substantially T-shaped and has two support openings 3, 3 '. The two pressing elements in the form of pressing lever 5, 5 'are the same design and each have a bearing opening 6, 6 ', wherein the pressing levers 5, 5' are pivotally mounted on the carrier element 2 via a respective pivot axis A1, A2. In this case, one pressing lever 5 is pivotable about the first pivot axis A1 and the other pressing lever 5 'about the second pivot axis A2 from a starting position into a pressing position. For this purpose, in each case a bolt 8, 8 'which provides the bearing and the pivot axis A1, A2' extends through in each case one of the support openings 3, 3 'and one of the bearing openings 6, 6'. The bolt 8, 8 'is the end with a non-releasable securing element 11, 11' with respect to an axial displacement in the bearing opening 6, 6 'and in the support opening 3, 3' secured.

As can also be seen in these figures, two bolts 8, 8 'extend parallel to one another through the two carrier openings 3, 3' or bearing openings 6, 6 'of the carrier element 2 or the pressing lever 5, 5', so that the two pivot axes A1, A2 also come to lie parallel to each other. During the pressing process, in which the pressing levers pivot from the starting position about the pivot axes A1, A2 relative to the carrier element 2 into the pressing position, the pressing levers 5, 5 'are guided in this manner and the pressing process can be carried out with high precision. The mutually facing pressing jaws 4, 4 'are pivoted against each other so far that they only have a small distance from each other and at the end of the pressing process along the pivot axes A1, A2 together form a substantially closed circle.

For this purpose, the pressing levers 5, 5 'each have a pressing jaw receptacle 22, 22' with a receiving surface into which the pressing jaws 4, 4 'are inserted. The pressing jaws 4, 4 ', in turn, comprise a pressing surface extending around a central axis M and having a pressing contour 23, 23' and a receiving surface. The pressing jaws 4, 4 'are positioned with their receiving surfaces in the respective pressing jaw receptacle 22, 22' of the pressing levers 5, 5 '. The pressing contours 23, 23 'are formed substantially concave so that a part to be pressed, such as a fitting to be pressed, by the pressing contour 23, 23' is compressible. Thus, if there is a fitting between the pressing jaws 4, 4 ', this is pressed radially by the pressing jaws in the pressing process through the pressing contours 23, 23'. The bolt 8, 8 'thus serves for the pivotable mounting of the pressing levers 5, 5' on the carrier element and sets at the same time the pivot axes A1, A2, by which the pressing levers are pivoted 5,5 'ready.

As already mentioned, the two bolts 8, 8 'are each end secured with a non-releasable securing element 11, 11' in the bearing openings 6, 6 'and the support openings 3, 3'. As in particular from the FIGS. 2 and 3 It is apparent that this is a securing element 11, 11 'in the form of an end cap, which is placed on the bolt end 9, 9'. The securing element 11, 11 'in this case comprises an inner wall 14, 14', which defines an inner space 16, 16 'for receiving the bolt end 9, 9'. The distal end of the securing element, or in other words the bottom surface 24, 24 'of the cap-shaped securing element, is planar and extends in each case perpendicularly with respect to the pivot axes A1, A2 or parallel to a plane of the carrier element 2.

As in FIG. 2 it can be seen, the bolt end 9, 9 'in the interior 16, 16' of the securing element 11, 11 ', wherein the inner wall 14, 14' completely surrounds these projecting from the support member 2 parts of the bolt 8, 8 '. The bolt end 9, 9 'is thus completely enclosed by the cap-shaped securing element 11, 11'. Furthermore, it can be seen that the securing element 11, 11 'on the outside has an outer wall 25, 25', which is in each case formed around the pivot axis A1, A2 in a frustoconical manner. In this case, the outer wall is formed with a rounding, which is formed in cross-section as an arc. The centers of the two-part arch are, viewed from the support element 2 in the direction of the bolt end 9, 9 'seen, arranged proximally to the carrier element 2 and the bolt end 9, 9' spaced.

In the interior 16, 16 'of the securing element 11, 11' is a on the bolt end 9, 9 ', in particular on the lateral surface 10, 10' of the bolt end, acting securing part 18, 18 'in the form of a spring ring. How good in FIG. 5 can be seen, the spring ring 18, 18 'in this case in a circumferential wall in the inner wall 14, 14' of the securing element groove 19, 19 'and engages in a circumferentially around the bolt 8, 8' around extending recess 21, 21 'of the Bolzens 8, 8 'a. To facilitate assembly, the spring ring may be substantially semicircular and over have an interruption (see FIG. 1 ).

At the in FIG. 5 shown pressing device 1 is located on both sides of the bolt 8 each have a non-releasable securing element 11, 11 '. As a result, axial displacement of the bolt in the carrier elements 2, 2 'and in the press lever 5 is prevented on both sides. This figure thus shows a bolt 8, which extends through the support opening 3 of a first support member 2, through the bearing opening 6 of the pressing lever 5 and through the support opening of a second support member 2 'and thereby at its distal end of the bolt as well as at its proximal end of the bolt each one end cap 11, 11 'is secured.

An additional assurance is provided by the presence of a respective spring ring 18, 18 'per end cap 11, 11'. These spring rings are preassembled in the groove 19, 19 'of the end caps and are put in a case of mounting the end caps in the recesses 21, 21' at the bolt ends 9, 9 ', respectively. snap into these. The bolt 8 is cylindrical in shape and has over its entire length a constant diameter DB and a full cross-section. The surfaces of the pressing lever 5 lie in each case flush on the surface of the first and second support member 2, 2 'and the inner surfaces of the support openings 3 or bearing openings 6 and the lateral surface 10 of the bolt 8 are in surface contact with each other. Both bolt ends 9, 9 'are in each case completely accommodated in the inner space 16, 16' of the end cap 11, 11 'and are completely enclosed by the inner wall 14, 14'.

The FIGS. 6 to 11 12 to 16 respectively show a further preferred embodiment of a pressing device 1 'or 1 "with a bolt fixation according to the invention The same elements are provided with the same reference numerals Here too, the pressing device with two pressing elements in the form of pressing levers according to an inventive aspect illustrated, with the following explanations also refer to the other aspects.

Unlike the pressing device 1 in the Figures 1-5 extends in the pressing device 1 'according to the FIGS. 6 to 11 in each case a bolt 8, 8 'through the Carrier openings 3, 3 'and bearing openings 6, 6' therethrough, which bolt is secured at the end end with an annular, non-releasable securing element 12, 12 'with respect to an axial displacement.

As in particular from the FIGS. 6 to 8 shows, this non-destructively releasable securing element 12, 12 'in the form of a closing ring on an inner wall 15, 15', which has an interior 17, 17 'for receiving the bolt end 9, 9'. Again, in the interior 17, 17 'on the bolt end, in particular on the lateral surface 10, 10' of the bolt end acting securing part 18, 18 'arranged in the form of a spring ring which in a circumferentially around the bolt 8, 8' around Groove 21, 21 'engages resp. snaps into them. The spring ring is in a in the inner wall 15, 15 'circumferential groove 20, 20' of the end ring 12, 12 'placed. In order that the outer wall 26, 26 'is not or can not be grasped effectively by a forceps-like tool, the outer wall '26, 26' of the terminating ring around the pivot axis A1, A2 here also frustoconical and has a rounding, which in cross section as a multipart Bow formed.

As with the securing by means of end cap 11, 11 ', the axial displacement of the bolt 8, 8' by means of a both sides attached to the bolt end ring 12, 12 'take place. That's how it shows FIG. 11 a bolt 8 which extends through the support opening 3 of a first support member 2, through the bearing opening 6 of the pressing lever 5 and through the support opening of a second support member 2 'and thereby at its distal bolt end 9 as well as at its proximal bolt end 9' respectively a closing ring 12, 12 'is secured. An additional assurance can also be done here by the presence of a respective spring ring 18, 18 'per end ring 12, 12'. In addition, the bolt 8 is also cylindrical in shape and has over its entire length a constant diameter DB and a full cross-section.

As if from a comparison of Figures 5 and 3 with the Figures 9 and 11 shows, the end ring 12, 12 'in contrast to the end cap 11, 11' on no bottom surface which covers the surface of the bolt end 9, 9 '. In other words, while the end cap 11, 11 'has a bottom surface 24, 24' and the parts of the bolt 8, 8 'protruding from the carrier element 2 are completely separated from the inner wall 14, 14'. are surrounded, the end ring 12, 12 'surrounds these protruding parts at least partially, namely completely around the lateral surface 10, 10' of the bolt ends 9, 9 'around, the surfaces of the bolt ends 9, 9' of the end ring 12, 12 ', however, respectively uncovered and detached.

Unlike the pressing devices 1, 1 'in the Figures 1-11 is the securing element 13, 13 'of the pressing device 1 "according to the FIGS. 12 to 16 no securing element, which is placed on the bolt end. Instead, this is a securing element 13, 13 ', which is a provided by deformation of the bolt end 9, 9' flange 7, 7 '.

That is, the bolt ends 9, 9 'are in the bearing openings 6, 6' and the support openings 3, 3 'with respect to a plane which extends parallel to the plane of the support member 2 and perpendicular to the pivot axes A1, A2, slightly protruding. The formation of this formed flanges 7, 7 'takes place here by a suitable forming technique, such as tumbling. As in particular in the FIGS. 13 and 14 it can be seen, these flanges 7, 7 'are plate-shaped and protrude with respect to said plane beyond the support openings 3, 3' of the support member 2 addition. As a result, the bolt 8, 8 'thus at the end with a non-releasable securing element 13, 13' in the form of the flange 7, 7 'with respect to an axial displacement in the bearing opening 6, 6' and the support opening 3, 3 'secured.

How out FIG. 16 it can be seen, the flange 7, 7 'integrally formed on both sides of the bolt 8, wherein the integral bolt end 9, 9', that is integrally formed on the bolt 8 flange 7, 7 ', has a diameter DF, which is larger than the diameter DB of the bolt 8 is.

That's how it shows FIG. 16 that is to say a bolt 8 which extends through the carrier opening 3 of a first carrier element 2, through the bearing opening 6 of the pressing lever 5 and through the carrier opening of a second carrier element 2 'and at its distal bolt end 9 as well as at its proximal bolt end 9' the flanges 7, 7 'is secured with respect to an axial displacement. Again, the bolt 8 is cylindrical in shape and has a constant over its entire length Diameter DB as well as a full cross-section.

As already mentioned, the above-mentioned aspects of the pressing device can also be in a pressing device in the form of a press loop resp. an intermediate jaw according to FIGS. 17 and 18 realize. The same parts are provided with the same reference numerals.

How out FIG. 17 shows, the pressing device 1 '''in the form of a press loop on two pressing elements 5, 5' and a support member 2 in the form of a loop member, with which the pressing force can be applied to a compact. In this case, two bolts 8, 8 'extend parallel to one another through the two carrier openings 3, 3' or bearing openings 6, 6 'of the carrier element 2 or the pressing elements 5, 5', so that the two pivot axes A1, A2 are also parallel to one another to come to rest. In order to secure the bolts end with respect to an axial displacement of the support element 2 in the bearing opening 6, 6 'and the support opening 3, 3', here fuse elements in the form of the end rings 12, 12 'are provided. But equally conceivable are also securing elements in the form of end caps or flanges provided by deformation of the bolt ends.

The pressing elements 5, 5 'and the carrier element 2 each have a pressing jaw receiving 22, 22', 22 "with a receiving surface, in which the pressing jaws 4, 4 ', 4" are used. The pressing elements 5, 5 'in the form of the loop parts are connected at one end to the carrier element 2 continuously via the bolts, while in each case the other end is an unconnected, free end, between which free ends a distance to form a closing point is provided. At the end of the pressing process, these two free ends are at a minimum distance from each other and the press sling then has a substantially cylindrical cross-section. At the free ends of the press loop, ie at the closing point, are connecting bolts 27, 27 'and grooves 28, 28', to which an intermediate jaw, such as in FIG. 18 shown, can be recognized.

In FIG. 18 is a pressing device 1 "" comprising a support member 2 with two Support openings 3, 3 'and a pressing element in the form of an intermediate jaw with two bearing openings shown. A bolt 8, 8 'extends through one of the carrier openings and the bearing openings. Again, the two bolts are each end provided with a securing element in the form of the end rings 12, 12 ', which also end caps or flanges provided by deformation of the bolt ends can be present. The intermediate jaw is formed with two jaw levers 29, 29 ', which open at one end into a claw 30. This claw 30 can be in grooves 28, 28 'of a press sling such as in FIG. 17 Insert shown and hang in the connecting pin 27, 27 '. In the connected position, the claw 30 completely surrounds the connecting bolts 27, 27 'of the press sling. By the jaw levers 29, 29 'are then moved towards each other, the free ends of the press sling are also moved toward each other and there is a pressing of the looped by the press sling compact. The jaw levers 29, 29 'are to this analogous to the pressing levers about a respective pivot axis A1, A2 pivotally mounted on the carrier element 2 and so from the initial position in which there was no compression of the compact, in the compression position in which the compact is pressed, pivotable. LIST OF REFERENCE NUMBERS 1,1 ', 1 " pressing device 19.19 ' groove 1 ''',1'' pressing device 20.20 ' groove 2,2 ' support element 21.21 ' puncture 3,3 ' support opening 22.22 ' Jaw head 4,4 ' pressing jaw 23.23 ' pressing contour 5.5 ' press member 24.24 ' floor area 6.6 ' bearing opening 25.25 ' outer wall 7,7 ' flange 26.26 ' outer wall 8,8 ' bolt 27.27 ' locking bolt 9.9 ' pintail 28.28 ' groove 10.10 ' lateral surface 29.29 ' Back lever 11.11 ' fuse element 30 claw 12.12 ' fuse element 13.13 ' fuse element A1, A2 swivel axis 14.14 ' inner wall M central axis 15.15 ' inner wall 16.16 ' inner space DB Diameter bolt 17.17 ' inner space DF Diameter flange 18.18 ' spring washer

Claims (14)

1. Pressing device (1, 1', 1", 1''' , 1'''') comprising:

   at least one carrier element (2) with at least one carrier opening (3, 3'),

   at least one pressing element (5, 5') with at least one bearing opening (6, 6'), for applying a pressing force to a workpiece, wherein the at least one pressing element (5, 5') is mounted on the carrier element (2) such that it can be pivoted about at least one pivot axis (A1, A2),

   wherein a respective bolt (8, 8') extends through the at least one carrier opening (3, 3') and the bearing opening (6, 6'), said bolt providing the bearing means and the pivot axis (A1, A2), wherein the bolt (8, 8') is secured at the end, by a non-releasable securing element (11, 11'; 12, 12'; 13, 13'), in respect of axial displacement in relation to the carrier element (2) in the bearing opening (6, 6') and the carrier opening (3, 3'),

   characterized

   in that the securing element (11, 11'; 12, 12') has an interior (16, 16'; 17, 17') which is delimited by an inner wall (14, 14'; 15, 15') and is intended for accommodating the bolt end (9, 9'), and wherein the interior (16, 16'; 17, 17') contains at least one securing part (18, 18'), which acts on the bolt end (9, 9'), in particular on the lateral surface (10, 10') of the bolt end.
2. Pressing device according to Claim 1, characterized in that the securing element (11, 11'; 12, 12'; 13, 13') cannot be released in a non-destructive manner.
3. Pressing device according to either of Claims 1 and 2, characterized
   in that the pressing device is in the form of a press sling, wherein both the at least one pressing element (5, 5') and the carrier element (2) are in the form of a sling part which can apply a pressing force to a workpiece, or
   in that the pressing device is in the form of a press sling, wherein the at least one pressing element (5, 5') is in the form of a sling part which can apply a pressing force to a workpiece, and wherein the carrier element (2) is an element which connects two sling parts; or
   in that the at least one pressing element is designed in the form of an intermediate jaw with two bearing openings (6, 6') and can be connected in particular to a press sling, and in that the carrier element (2) has two carrier openings (3, 3'), wherein the bolt (8, 8') extends through in each case one of the carrier openings (3, 3') and of the bearing openings (6, 6').
4. Pressing device according to either of Claims 1 and 2, characterized in that two pressing elements (5, 5') in the form of pressing levers are provided, and in that the at least one carrier element (2) has two carrier openings (3, 3'), wherein the bolt (8, 8') extends through in each case one of the carrier openings (3, 3') and of the bearing openings (6, 6').
5. Pressing device according to Claim 4, characterized in that the two pressing elements (5, 5') are arranged between two spaced-apart carrier elements (2, 2'), wherein each of the carrier elements (2, 2') has respectively two bearing openings (6, 6').
6. Pressing device according to either of Claims 4 and 5, characterized in that the two pressing levers (5, 5') have at least two pressing jaws (4, 4') for applying the pressing force to the workpiece, and in that the pivot axes (A1, A2) are located parallel to one another, wherein the one pressing lever (5) can be pivoted about the one pivot axis (A1), and the other pressing lever (5') can be pivoted about the other pivot axis (A2), from a starting position into a pressing position such that, at the end of the pressing operation, the pressing jaws (4, 4') together form an essentially closed circle, as seen along the pivot axes (A1, A2).
7. Pressing device according to one of the preceding claims, characterized in that the securing element (11, 11'; 12, 12') is a securing element which is positioned on the bolt end (9, 9') and encloses the bolt end (9, 9') at least to some extent, preferably in full.
8. Pressing device according to one of the preceding claims, characterized in that the securing part is a spring washer (18, 18'), which is placed in a groove (19, 19'; 20, 20') running in an encircling manner within the inner wall (14, 14'; 15, 15'), which spring washer engages in a recess (21, 21') extending circumferentially around the bolt (8, 8').
9. Pressing device according to one of preceding Claims 1 to 7, characterized in that the securing part is in the form of a plurality of lugs which project into the interior (16, 16'; 17, 17') from the inner wall (14, 14'; 15, 15') and, when the securing element (11, 11'; 12, 12') is subjected to a severing force, act as barbs, or in that the securing part is a lock washer.
10. Pressing device according to one of Claims 7 to 9, characterized in that the inner wall (14, 14') completely surrounds those parts of the bolt (8, 8') which project from the carrier element (2).
11. Pressing device according to one of Claims 7 to 10, characterized in that the securing element has an outer wall (25, 25'; 26, 26') on its outside, which outer wall (25, 25'; 26, 26') is of frustoconical design around the said pivot axis (A1, A2), in particular such that the outer wall (25, 25'; 26, 26') cannot be gripped, or cannot be gripped effectively, by a pliers-like tool.
12. Pressing device according to Claim 11, characterized in that the outer wall (25, 25'; 26, 26') of the securing element (11, 11'; 12, 12') is of rounded design with rounding around the said pivot axis (A1, A2).
13. Pressing device according to one of the preceding claims, characterized in that both ends of the bolt (8, 8') have in each case a preferably identical, non-releasable securing element (11, 11'; 12, 12') arranged thereon, or
    in that the bolt (8, 8') has an integrally formed bolt end at one end, wherein the integral bolt end has a diameter which is greater than the diameter (DB) of the bolt, wherein the said non-releasable securing element (11, 11'; 12, 12') is arranged at the other end.
14. Pressing device according to one of the preceding claims, characterized in that the bolt (8, 8') is designed in the form of a hollow bolt with a bolt opening passing through in the direction of the pivot axis (A1, A2), or in that the bolt (8, 8') has a solid cross section over its entire length.

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