EP1068053B1 - Device for removing break-off components from a sheet of material or equivalent - Google Patents

Abstract

The breaker tool is associated with a movable abutment device formed by an abutment tool (20) rigidly connected in keyed engagement to the matrix (14) around the edge of the aperture (16,18) and having a support or abutment surface (24, 25) which can be inclined to the connecting area. The connecting area can be formed by a rear cut socket groove in the matrix around the opening (16) and by a coupling rib engaging therein. The breaker tool can be a pressure pin or forked member with roughened surface produced mechanically, chemically or electrically.

Description

The invention relates to a device for removing Break-out parts, especially pieces of waste, from a single cut or the like. Material sheets containing surface pieces according to the preamble of the independent claim.

The applicant's EP 0 446 702 B1 shows that Automatic punching machines for making blanks from cardboard sheets in the folding box industry for more than 30 years are provided with stripping devices, which are preferred arranged in a set-up table outside the punching machine become. Such a stripping station is for manufacturing of particular importance as they are used incorrectly takes the largest share of the total set-up time and running a badly set stripping station Disruption of the production process leads.

In the stripping station, the punched cardboard sheet is replenished reaching a predetermined rest position on the usually offered by a stripping board or a die Break-out area by means of break-out pins pressing from above free of waste.

In the development of stripping technology, the first was top tool pin pushing the waste piece through leads to the breakout of the stripping board. Then an additional came Add lower tool with lower pins, which with align the top tool pins and clamp the waste piece hold. Because a stripping tool is only a piece of waste can break out safely if between the tool and the piece of waste has a certain adhesion, have the mentioned lower pins as a cheap resistor at the moment the striking tool hits or stripping device on the piece of waste.

If you want to avoid a clamping tool, you have to break out in different places in the stripping area be kept smaller than the piece of waste assigned to it, thus this in small areas on the stripping surface or die with higher friction. The resistance now occurs when the stripping pin hits on the waste thanks to the friction generated. When driving through the breakthrough by means of the stripping pin and the waste part there is friction on the narrower hole walls, whereby a certain adhesion is achieved.

Known from DE-A-25 35 452 is the so-called DYN pin Stripping pin with a tip, the i.w. conical side walls with smooth surface, concave contours in cross section to have. In the stripping process, this tip meets that Piece of waste that is placed on the tip of the tip Breakthrough edges so much resistance that this tip slightly in the material of the waste piece can penetrate. This will make an undesirable side Evasion of the piece of waste prevented. When driving through of the breakthrough, the piece of waste bends Tension between it and the breakthrough wall is said to DYN pin enough friction to the desired adhesion offer with the piece of waste, which then if necessary The use of the DYN pin makes a lower tool unnecessary could do.

The above-mentioned EP 0 446 702 B1 suggests a simplification of stripping tools an abutment in front, the one inside of the breakthrough - - at least partially in an inclined position - - Movable at a distance from the stripping surface and / or resilient surface, which in its rest position piece of waste located in the material sheet approximately parallel reaches under and when moving - - primarily when lowering - - The piece of waste through the stripping device in one Angle of inclination to the material sheet is transferred. The resilient surface can be designed as a tongue-like spring, the one at the break-out area - - with her in the rest position about in alignment - - is fixed and its free end in Breakthrough is arranged. Angle pieces are also described, one leg is aligned with the stripping surface and their other legs below the stripping surface is articulated and spring loaded. The resilient surface can also be bent by rubber profiles or by aorscen become.

A device mentioned in the introduction is described in WO-A-97 / 30829- From the edge of a die opening go right-angled straight cuts or grooves from which in large distance to the breakthrough one in plan view rectangular extension as a space for a block-like Section connecting the rear plug-in part an otherwise strip-like, with an end section in forms the breakthrough abutment device. This wider compared to the molded abutment web Block tapers conically in the direction of insertion Breakthrough end sections of the abutment webs reach under a piece of garbage and are pressed of a stripping tool lying on this along a at the transition to the block line located at the end pressed down until they drop the scrap piece down release. This font forms the basis for the Preamble of patent claims 1.

Finally, DE-C-41 24 089 offers a cuboid Stripping tool of rectangular cross section, from the Forehead in extension of the two narrow sides two Protect pressure peaks.

Knowing this state of the art on the stripping process the inventor has set the goal of removing To further improve waste pieces from material sheets and to simplify the tools required for this. In particular, these tools are intended for the treatment of Small rod cases can be used.

The teaching of the independent leads to the solution of this task Claim; the subclaims give favorable further training on.

According to the connection pairing consists of a Plug-in profile of the die and an associated hollow profile, that of one leg of an elbow as Support molding is formed, the other leg one Support lip is made of elastic material, the shape of the hollow profile being one corresponds to cylindrical bowls.

If necessary, several such connection pairs are provided.

The contra-angle with its - in the installed position vertical - - thigh such as the flexible other that forms the contact surface - - in the horizontal installation position - - leg can be limited from a total flexible material that has a long service life guaranteed

Other inserts for the die are in breakthrough arranged on its edge, applied to plug-in profiles Pad fittings that face each other as well with mutually directed radial support lips elastic material are provided.

In order to close the stripping part after the release process, if necessary can hold the leg forming the bearing surface in Break-out direction downstream of at least one catch finger but a pair of flanking flanks is preferred Fang fingers. These expand from their free End cut longitudinally towards the leg formed on it to increase flexibility. In another embodiment becomes the horizontal leg of side panels flanked, which are formed on the other leg, so run vertically.

The requirement that the stripping tools between in the stripping direction movable surfaces of the abutment device course leads to higher operational safety, because a kind of pliers handle arises; such can occur at the stand do not adjust the technology, as the stripping tools are usually inside of the free edges of the faces certain contour.

Attacking the stripping tools can then also be more efficient if there is an edge recess opposite its free end, that of the free edge of the support surface emanates.

It has proven to be cheap to use the contact surface Stripping tool a push pin with a rounded free End or a fork organ with one or more finger-like fork tines - - preferably flat cross-section - - assign.

Small pieces of waste in particular make the bending movement of the Stripping tool in such a way that it is vertical put. This leads to smooth cardboard surfaces Sliding of the pressure pins on the cardboard surface and so on an insufficient breakout. That's why it's better access for the sake of the free end of the pressure step or the fork tines designed as a rough surface. This rough surface can be formed by a coating, for example with oxides, carbides, corundum or the like. formed and possibly applied by thermal spraying becomes. Another embodiment according to the invention offers a rough surface with in the surface of the pressure pin or the forks / irregularities provided, such as Teeth or gradations. This can be done by mechanical, chemical or electrical treatment.

Thanks to the described roughened surface - - for the separately Protection is sought - - the desired fixed access is created, and slipping of the part to be broken out effectively prevented. For this, it turned out to be sufficient the axial height of the roughened surface at most Diameter of the pressure pin or the width of the fork tine to let them correspond, preferably less than 5 mm choose.

That forked organ should protrude from a plate-shaped male and is according to the invention with this by a clamping lugs offering section of the fork organ connected to the can also have stops which against the lower surface of the male be performed.

Fig. 1:

die Draufsicht auf ein Widerlagerwerkzeug für ein Abfallstück zu dessen Entnahme aus Kartonbogen in der Wellpappen- und Faltschachtel-Industrie;

Fig. 2:

eine Seitenansicht zu Fig. 1;

Fig. 3:

die der Fig. 2 entsprechende Seitenansicht einer anderen Ausgestaltung;

Fig. 4 bis Fig. 7:

schematisch dargestellte, aufeinander folgende Verfahrensschritte mit einem geschnitten dargestellten Ausbrechbrett, das ein Widerlagerwerkzeug nach Fig. 1, 3 enthält und dem ein Ausbrechwerkzeug zugeordnet ist;

Fig. 8:

eine etwa der Fig. 6 entsprechende vergrößerte Darstellung mit einem gegenüber Fig. 6 geändertem Widerlagerwerkzeug sowie einem anderen Ausbrechwerkzeug;

Fig. 9:

die Draufsicht auf einen Teil eines weiteren Ausbrechbrettes mit Widerlagerwerkzeug und Ausbrechwerkzeug nach Fig. 8;

Fig. 10:

eine der Fig. 9 entsprechende Wiedergabe einer weiteren Ausführungsform;

Fig. 11:

eine Schrägsicht auf ein weiteres Widerlagerwerkzeug mit Ausbrechwerkzeug sowie angedeuteten Endlagen einer bewegbaren Auflageplatte;

Fig. 12:

eine der Fig. 11 entsprechende Wiedergabe einer Anordnung mit Ausbrechwerkzeug;

Fig. 13:

eine Schnittskizze zu Fig. 11,12;

Fig. 14, 15:

jeweils ein Widerlagerwerkzeug in Draufsicht und geschnitten dargestelltem Ausbrechwerkzeug;

Fig. 16:

die Vorrichtung nach Fig. 9 in geschnittener Frontansicht;

Fig. 17:

die Lagerung des Ausbrechwerkzeuges der Fig. 16 nach deren Linie XVII - XVII;

Fig. 18:

eine Frontansicht eines plattenartigen Ausbrechwerkzeuges in zwei Ausführungen;

Fig. 19:

zwei Seitenansichten zu Fig. 18;

Fig. 20:

einen vergrößerten Schnitt durch eine weitere Ausgestaltung des Ausbrechwerkzeuges der Fig. 18;

Fig. 21:

eine der Darstellung in Fig. 18 entsprechende Wiedergabe eines weiteren Ausbrechwerkzeuges;

Fig. 22:

eine Seitenansicht zu Fig. 21;

Fig. 23:

eine Frontansicht eines anderen Ausbrechwerkzeuges;

Fig. 24 bis Fig. 26:

Seitenansichten dreier anderer Ausführungen des Ausbrechwerkzeuges;

Fig. 27, 28:

das Ausbrechwerkzeug der Fig. 24 in zwei Stufen eines Ausbrechvorganges;

Fig. 29, 30:

jeweils eine Schrägsicht auf eine Einheit aus Widerlagerwerkzeug und Ausbrechwerkzeug;

Fig. 31:

eine Schrägsicht auf ein anderes Ausbrechwerkzeug;

Fig. 32:

eine Schrägsicht auf eine andere Ausgestaltung eines Widerlagerwerkzeuges;

Fig. 33, 34:

zwei den Fig. 4 bzw. 5 entsprechende Darstellungen eines Arbeitsvorgangs mit Widerlagerwerkzeugen nach Fig. 32;

Fig. 35 bis Fig. 38:

Draufsichten auf federnd wirksame Sonderwerkzeuge;

Fig. 39, 40:

Draufsichten auf mechanisch wirksame Sonderwerkzeuge;

Fig. 41,43,46:

Schnittansichten von Ausbrechbrettern mit jeweils eingesetztem Widerlagerwerkzeug;

Fig. 42,44,45:

die Draufsichten zu den Fig. 41, 43, 46;

Fig. 47:

das Widerlagerwerkzeug der Fig. 43, 44 in Frontansicht;

Fig. 48 :

das Widerlagerwerkzeug der Fig. 46, 47 in Schrägsicht.

Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing; this shows in:

Fig. 1:

the top view of an abutment tool for a piece of waste for its removal from cardboard sheets in the corrugated cardboard and folding box industry;

Fig. 2:

a side view of Fig. 1;

Fig. 3:

the side view corresponding to Figure 2 of another embodiment.

4 to 7:

schematically illustrated, successive method steps with a stripping board shown in section, which contains an abutment tool according to Figures 1, 3 and with which a stripping tool is assigned;

Fig. 8:

6 shows an enlarged representation corresponding to FIG. 6 with an abutment tool modified compared to FIG. 6 and another stripping tool;

Fig. 9:

the top view of part of another stripping board with abutment tool and stripping tool according to FIG. 8;

Fig. 10:

a representation of another embodiment corresponding to FIG. 9;

Fig. 11:

an oblique view of another abutment tool with stripping tool and indicated end positions of a movable platen;

Fig. 12:

a representation corresponding to FIG 11 of an arrangement with stripping tool.

Fig. 13:

a sectional sketch of Fig. 11,12;

14, 15:

each an abutment tool in plan view and cutout shown cut;

Fig. 16:

the device of Figure 9 in a sectional front view.

Fig. 17:

the bearing of the stripping tool of Figure 16 along the line XVII - XVII.

Fig. 18:

a front view of a plate-like stripping tool in two versions;

Fig. 19:

two side views of Fig. 18;

Fig. 20:

an enlarged section through a further embodiment of the stripping tool of FIG. 18;

Fig. 21:

a representation of another stripping tool corresponding to the representation in FIG. 18;

Fig. 22:

a side view of Fig. 21;

Fig. 23:

a front view of another stripping tool;

24 to 26:

Side views of three other versions of the stripping tool;

27, 28:

the stripping tool of Figure 24 in two stages of a stripping process.

29, 30:

each an oblique view of a unit consisting of abutment tool and stripping tool;

Fig. 31:

an oblique view of another stripping tool;

Fig. 32:

an oblique view of another embodiment of an abutment tool;

33, 34:

two representations corresponding to FIGS. 4 and 5 of a work process with abutment tools according to FIG. 32;

35 to 38:

Top views of resilient special tools;

39, 40:

Top views of mechanically effective special tools;

41,43,46:

Sectional views of stripping boards with abutment tools inserted in each case;

42,44,45:

the top views of FIGS. 41, 43, 46;

Fig. 47:

the abutment tool of Figures 43, 44 in front view.

Fig. 48:

46, 47 in an oblique view.

The designs of Figures 1-16 and 35-48 are not according to the invention.

Cardboard sheets 10 used in the folding box industry have punched blanks for folding shafts or the like, whereby pieces of waste 12 arise in the blanks or on them. After a for reasons of clarity in the Drawing not reproduced punching station arrives punched cardboard sheet 10 on a stripping board or Die 14 of the example thickness b of 12 mm to whom he is freed from his pieces of waste 12; this are located above - - depending on their contour - - Breakthroughs 16 in which the cross section of 4 to 7 an upper frame part 17 with a vertical wall a downwardly opening cone part 18 follows.

In the opening 16 is an abutment tool 20 for the piece of waste 12, which is a kind of elbow as shown in FIG. 1.2 with two legs 22, 24 made of flexible plastic high number of Lasc changes. Of the vertical in the installed position Leg 22 protrudes a - - undercut flanks 26 having - - coupling rib 27, which in a vertical groove 28 dovetail cross section of the die 14 is inserted. As shown in Fig. 9, this goes Vertical groove 28 from a breakthrough 16 delimiting Wall surface 15 from.

The resilient horizontal leg 24 of the abutment tool 20 of thickness a offers an internal recess 30 as well its free edge 25 at an edge recess 32; two the latter flanking prong-like collar parts 34 of the horizontal leg 24 are longitudinally curved and form each a kind of pan.

3 is on the vertical leg 22 a longitudinally curved downwards and towards its free end 36 tapering catch finger 38 for the waste piece 12 is molded.

On the surface 25 of the horizontal leg 24 Waste piece 12 presses a stripping element from above or tool in the form of a pressure pin 40 with roughened - - similar to a fingertip - - dome-like Printing end punctiform or - - for example in Fig. 8,12 - - As a fork member 41 approximately linear; the flat forks 42 of the fork organ 41 are aligned with one another. Either that dome-like print end of the pressure pin 40 as well the flat ends of the mentioned prongs 42 are with a the roughness producing coating 44 axial height h of provided about 4 to 10 mm, for example by a thermal spraying process made of aluminum oxide, corundum Carbide grains or the like. has been manufactured.

The preferred height h is at most equal to the diameter d of the pressure pin 40 and the roughness depth is less than 0.5 mm. This coating can also be roughened Surface of the pressure pin 40 or flat prong 41 replaced be the chemical, electrical or - - approximately by means of Sandblasting - - is generated mechanically.

When the stripping tool (s) 40, 41 are lowered, this becomes Waste piece 12 through. Print separated from the cardboard sheet 10 and led away in the direction of break-out x.

9 has the edge recess 32 a partial circle contour at the end, and the horizontal one Leg 24 is flanked by side parts, each form the catch finger 38 described and - - as well Horizontal leg 24 itself - on the vertical leg 22 are molded.

FIG. 10 shows a change in the connection pairing between abutment tool 20 _n and die 14, as compared to FIG. 9; the latter engages with a vertical bar 29 projecting from the wall surface 15 into a vertical groove 31 of the abutment tool 20 or its vertical leg 22. The flank of the vertical groove 31 is designated 26 _a .

In the abutment tool 20 _a according to FIGS. 11, 12, the support surface 25 for the waste piece 12 is offered by a support plate 46 which hangs separately between side walls 23; this rests with undetectable side pins - pivot axis A - in finite bearing grooves 48 of the side walls 23 and can be transferred from the horizontal position into the inclined position indicated at 46 _a . In this, the support plate 46 is approximately parallel to inclined - also forming catch fingers - front ribs 50 of the side walls 23.

Fig. 13 is intended to suspend one type of mechanical Finger-forming platen 46 can be seen as well front surfaces 52 of the side walls that are inclined downwards 23 as a deflector for the waste piece 12.

The support plate 46 _a of FIG. 14 intended for long pieces of waste 12 shows two edge recesses or chambers 32 which flat tines 42 of an otherwise not shown fork member 41 are assigned to.

In Fig. 15 protrude from opposite wall surfaces 15 delimiting the opening 16 strip-like cantilever parts 34 _a made of flexible material, which form chamber spaces 33 of width n between them; those cantilever parts 34 _a flank the pressure pins 40 dipping into the chamber spaces 33 or flat tines 42 corresponding to them.

That the fork member 41 up to and shaped out of it transversely to the tine axis B stops 54 in a Male plywood 56 of a thickness b: z. B. 12 mm is firmly driven, is shown in Fig. 16.17. The firm fit is close by the upper edge, to the tine axis B parallel stop tabs 59 (Fig. 21 to 23) or by on both sides of the surfaces 58 of the fork member 41 protruding gripping beads or clamping lugs 60 achieved.

The wart-like clamping nose 60 or the stop 54 can also be seen in the fork member 41 _a of FIGS. 18 to 25. The - free ends of the fork or flat tines 42 - delimited by straight or curved end edges 43 or 43 _a - here have mechanically produced roughnesses in the form of inclined at 30 ° in FIGS. 18, 19, formed on one side or on both sides close to the edge Teeth 61 in FIGS. 21, 22 teeth 61 _a projecting approximately 90 °, hook 61 _b (FIG. 20) or molded shoulders 61 _c on fork prongs 42 _a .

In addition, FIG. 23 offers a stripping tool 41 _b with only one flat prong 42 _b , which is delimited at the bottom by the aforementioned end edge 43 _a which is curved in cross section.

27, 28 make it clear how a small piece of waste 12 is gripped from the free end of the flat prongs 42 _a and - in the vertical position - is placed in the shoulder 61 _c . The safe downward guidance of the waste piece 12 is ensured by its frictional pressing against the stripping tool or fork member 41 _a by the collar part 34 of the abutment tool 20. Due to this non-positive contact of the waste piece 12 on the stripping tool 41 _a , the shoulders 61 _{c come} into effect. During the stripping process, the stripping tool 41 _a presses the waste piece 12 against the abutment tool 20, clamps it in and inevitably leads it downwards. The piece of waste is positioned approximately vertically. When the stripping tool is lowered further, the waste piece 12 is pushed downward by the tooth 61, 61 _a - - or the hook 61 _b or the shoulder 61 _c - -. The abutment tool 20 or its cantilever part 34 snaps back into its starting position.

The described system not only brings advantages with inner waste pieces12, but also with so-called edge waste; the breaking out of Ranbabfall occurs only with the described combination of stripping tool 41 _b and abutment tool 20; Wooden stamps are superfluous. There is no longer any danger from the wooden stamps that are inevitably close to the stripping die 14. 4 mm distance between the stripping tool 41 _a and the outer contour of the stripping die 14 create sufficient tolerance and safety. A movement corresponding to the pitch during the severing process virtually leads the edge waste away from the break-out die 14. As with internal waste, the waste is placed vertically here and safely guided downwards through the push teeth 61, 61 _a , 61 _b , 61 _c .

29 shows an illustrative oblique view of a die 14 made of plywood, at the opening 16 of which an angle piece 20 is releasably fixed as an abutment tool; Above the latter stands a fork member 41 _a with shoulders 61 _c molded into its flat prongs 42 _a .

The fork member 41 _a of Fig. 30 can be of the flat tines 42 into the interspaces zinc einragenden inclined teeth 61 as well as recognize a region of coating 44 to the shaped tip down as finger or end portions 45 of the flat prongs.

The stripping tool 41 _b of FIG. 31 is equipped with a flat prong 42 _a which is provided on the side and which offers an end shoulder 61 _c , corresponding to that of FIG. 23.

The die 14 _a of FIGS. 33, 34 takes in a breakthrough 16 _{a with the} same cross-section on both sides - a support fitting 62 - shown in FIG. 32 - made of a cylindrical socket neck 63 and a radial support lip 64, which in turn offers an edge recess 32. The inverted neck 63 is connected to a plug-in profile 65.

That lying on the mutually facing support lips 64 Waste piece 12 is provided by over the support lips 64 pin-like stripping tools 40 in the stripping direction x pressed against these support lips 64, the latter deform elastically and return to the starting position snap back. Here too are the stripping tools 40 arranged in the region of the edge recesses 32.

The drawing below shows some sketches of special tools in plan view, namely in FIGS. 35, 36 spring clips 66, 66 _a for waste pieces 12 _a and 12 _{b of} round and semicircular contours, also in FIGS. 37, 38 spring clips 70 and 68 for waste 12 _{c of} a stretched so-called euro hole or for cigarette waste 12 _d . 39 and 40 show mechanical clips 72 and 72 _a for round waste pieces 12 _a and for rectangular waste pieces 12.

These - as a basis for standardization - special tools 66, 66 _a , 68, 70, 72, 72 _a each have a frame part 76 from which spring tongues 34 _b project inward in FIGS. 35 to 37. The rectangular frame parts 76 of the clips 72, 74 of FIGS. 39, 40 contain — optionally spring-shaped — support plates 46 _b , which can be rotated to a limited extent about a pivot axis A and in each of which a pressure profile 78 protrudes in the edge recess (s) 32.

Fig. 41 shows an abutment tool 20 _e , the cross-sectionally rectangular vertical leg 22 - - with the formation of a groove - - is provided with a strip 80 parallel to it at a distance y; both are connected by a cross bar 82 formed on both sides.

The parallel strip 80 engages from below in a punching 84 of the stripping board 14 corresponding to its cross section, which is separated from the opening 16 of rectangular cross section by a board web 86 sitting in that groove. From the latter, a vertical groove 28 _a - also rectangular in cross section - with stepped flank surfaces 88 starts. The vertical leg 22 of the abutment tool 20 _f of FIGS. 43 to 45 also sits in the back area 90 of a vertical groove 28 _a . On the flanks of the vertical leg 22, longitudinally L-shaped plug-in strips 92 are integrally formed at a distance y from the above-mentioned transverse webs 82, which are inserted into corresponding flank holes 94 of the stripping board 14 in the rest position shown in FIGS. 43, 44 - the latter are thus in alignment that back area 90 of the vertical groove 28 _a .

An abutment device 96 in the stripping board 14 of FIGS. 46, 47 consists of an angular plastic body 21 provided for the vertical groove 28 _b with a short vertical leg 97, which has a downwardly open plug channel 98 for a cross-sectionally rectangular tongue 99 of the vertical leg 100 of a bracket angle 102 offering. 46, 47 of the horizontal leg 101 is non-positively fixed on the lower surface 13 of the stripping board 14.

Claims (19)

1. Device for removing break-out parts, especially waste pieces (12), from a sheet of material (10) containing blanks or like flat pieces which rests on a die (14, 14_a) or like break-out surface in such a way that the break-out part spans an opening (16, 16_a) of the break-out surface and is pressed off through the latter under pressure from at least one break-out tool (40, 41), wherein assigned to the break-out tool is a counter-support device (20_e, 62) movable in the direction of movement thereof which in the peripheral region of the opening rigidly connected in form-fitting manner to the break-out surface or die and to a contact or counter-support surface (24, 25, 64) inclinable with respect to this mated pair projects into the opening which surface in the position of rest engages in substantially parallel manner under the break-out part or waste piece located in the sheet of material and on movement of the waste piece by the break-out tool is constructed to vary its position and in particular to move into an angle of inclination relative to the sheet of material, wherein the mated pair is designed to be brought together in the break-out direction (x), characterised in that the mated pair consists of a plug profile (65) in the die and an assigned hollow profile (63) formed from a leg of an angle piece as contact-shaping pieces (62) whose other leg is a contact lip (64) composed of elastic material, wherein the shape of the hollow profile is that of a cylindrical cup.
2. Device according to claim 1, characterised in that contact-shaping pieces (62) arranged at the edge of the opening (16_a) and fitted on plug profiles (65) are positioned opposite one another which pieces are provided with radial contact lips (64) composed of elastic material and directed radially towards one another.
3. Device according to claim 1 or 2, characterised in that arranged behind the leg (24) forming the contact surface (25) in the break-out direction (x) is at least one catching finger (38), in particular a pair of catching fingers.
4. Device according to claim 3, characterised in that the leg (24) forming the contact surface is flanked by side parts which are moulded in place on the other leg (22) and form the catching fingers (38).
5. Device according to claim 3 or 4, characterised in that the catching finger (38) widens in longitudinal section from its free end (36) to the leg (22) moulded in place thereon.
6. Device according to one of claims 1 to 5, characterised in that the break-out tool(s) (40; 41, 42) runs (run) between surfaces (34, 34_a) of the counter-support device (20, 20_a, 20_b, 20_n) movable in the break-out direction (x).
7. Device according to one of claims 1 to 6, characterised in that the part (24; 46, 46_a; 64) containing the contact surface (25) is provided on its free edge (35) with at least one peripheral recess (32), wherein if need be the peripheral recess(es) (32) is (are) positioned opposite the free end(s) of the break-out tool (40, 41).
8. Device according to one of claims 1 to 7, characterised in that assigned to the contact surface (25) as break-out tool is a pressure pin (40) having a rounded free end or a fork element (41, 41_a, 41_b) having one or more finger-like fork tines (42, 42_a, 42_b) preferably of flat cross-section.
9. Device according to claim 8, characterised in that the free end of the fork tines (42, 42_a, 42_b) is formed from a moulded-in arc-like curve (43_a) or a moulded-out tip.
10. Device according to claim 8 or 9, characterised in that the free end of the pressure pin (40) or the fork tine (42, 42_a, 42_b) is constructed as a rough surface.
11. Device according to claim 8, characterised in that the rough surface is formed by a coating (44), in particular by a coating containing oxides, carbides, corundum or the like.
12. Device according to claim 10, characterised in that the coating (44) is applied by means of thermal injection moulding.
13. Device according to claim 10, characterised in that the rough surface is formed by a coating of plastic or rubber.
14. Device according to claim 10, characterised in that the rough surface is formed by irregularities provided in the surface of the pressure pin (40) or the fork tines (42, 42_a, 42_b) .
15. Device according to claim 10 or 14, characterised in that the surface of the pressure pin or the fork tines (42) is applied mechanically, chemically or electrically.
16. Device according to claim 14 or 15, characterised in that on the pressure pin (40) or fork tines (42, 42_a, 42_b) close to the end edge at a distance from it downwardly projecting teeth (61, 61_a), hooks (61_b) or at least a shoulder (61_c) are moulded out at an inclination.
17. Device according to one of claims 10 to 16, characterised in that the axial height (h) of the rough surface (44) is at most equal to the diameter (d) of the pressure pin (40) or the width of the fork tine (42).
18. Device according to one of claims 8 to 17, characterised in that the fork element (41) projects down from a plate-shaped die (56).
19. Device according to claim 18, characterised in that the section of the fork element (41) connected to the die (56) has clamping lugs (60) and/or limit stops (54).

Images