EP0104441A1 - Insertion device - Google Patents

Abstract

1. Dowel placer for installing horizontal dowels when producing a concrete carriageway, comprising a horizontal carrier (16) connected by at least two parallelogram braces (20) to a frame (26) of the dowel placer (10), a plurality of dowel holders (18) fixed one beside another on the carrier (16), a raising and lowering means (22, 28) for moving the carrier (16) between an extreme top position, the charging position and an extreme bottom position, the dowel inserting position ; riddling drives which engage the carrier (16) or the dowel holders (18), characterized in that a double arm link (30) is articulated on the raising and lowering means (22, 28) and is that one of the two supports (20a, 20b) of the parallelogram support arrangement (20) is articulated at one end on the carrier (16) and at the other on the raising and lowering means (22, 28) in the region of the double arm link (pivoting spindle 32) and in that the other support (20b) is articulated at one end on the carrier (16) and at the other on one of the two arms (30a, 30b) of the double arm link (30) and in that an adjusting means (34, 36, 40) engaging the other arm (30b) is provided for pivoting the double arm link (30) and thus the carrier (16).

Description

The invention relates to a method for producing a concrete road surface consisting of one or more concrete layers, wherein after the production of one or more of the layers, steel inserts, in particular dowels, are pressed into the not yet hardened layer from above and with shaking to a predetermined height above of the formation.

When producing modern concrete roadways, the ceiling (single or multi-layer) is divided into individual fields). the deep joints are separated from each other either by the ceiling thickness (mostly in the longitudinal direction of the carriageway) or by cuts of smaller depth (usually in the transverse direction), which form the predetermined breaking points for the concrete carriageway pavement. This prevents uncontrolled cracks in the concrete pavement. In order to keep the relative movements of adjoining fields within limits, steel inserts, in particular dowels, are inserted into the not yet hardened concrete during the manufacture of the ceiling, in particular dowels that have a Relativbe running in a vertical plane along the groove or joint limit movement, as well as anchors that counteract an enlargement of the groove or joint. These steel inserts must lie in the hardened concrete with only small tolerances at a predetermined height above the level so that they can develop their stabilizing effect. According to a known method, the steel inserts are attached to elongated wire baskets. These wire baskets are anchored to the planned position along the cut to be made later on the formation before the production of the first concrete layer. The slab concrete is then installed, particularly using slipform pavers. Due to the anchoring of the baskets, they retain their intended position in the majority of cases when the paver is run over and the concrete is compacted by vibrating bottles or the like. A disadvantage of this method, however, is that the laying and anchoring of the baskets on the formation requires a relatively large amount of work and is mechanized only to a small extent. The cost of materials for the baskets is also high. Furthermore, the dowel baskets, which are fastened to the formation perpendicular to the longitudinal direction of the carriageway, hinder the movement of construction site vehicles and construction machines. In this case, for example, "installation from the front" is out of the question, ie a road surface production with slipform paver, in which the paving material is tipped in front of the slipform paver by a leading mixer or by truck. To eliminate this disadvantage, it is known to omit a central dowel basket in a transverse row of dowel baskets and to insert this dowel basket after the production of a base layer in a subsequently produced, correspondingly large recess in this layer. This measure complicates the procedure considerably.

In a known method of the type mentioned, the steel inserts are made after the lower ones Lay the layer in the designated places and then shake to a predetermined height while shaking. Due to its stiffer consistency, the lower concrete layer generally ensures that the steel inlays maintain their intended position, in particular height, within the road surface during the further treatment of the ceiling. Nevertheless, it is not completely excluded that the steel inserts migrate from their intended position during further processing, in particular sink lower. This can happen if the lower base layer has a changing consistency, or if the vibrating and smoothing planks used in the manufacture of the top layer make the concrete flow down to deeper areas. This known method is particularly unsuitable for a single-layer construction with a single base layer, since this comparatively softer concrete is unable to hold the steel insert at the intended height until it has hardened.

In contrast, the object of the invention is to improve the method of the type mentioned in such a way that it can also be used for single-layer concrete pavements and that it is ensured that the vibrated steel inserts maintain their intended position within the base layer.

This object is achieved in that steel inserts are shaken, which are provided with the predetermined height correspondingly formed feet. The feet of the vibrated steel inlays are supported on the formation and therefore ensure that the steel inlays maintain their intended position during the subsequent processing steps essentially regardless of the consistency of the concrete. An "installation from the front" is easily possible. In a development of the invention it is proposed that the _S feet are attached to the steel inserts immediately before shaking, preferably plugged in. The decision about which steel inserts are combined with which feet can therefore be made on site, which allows a quick adaptation to changing operating conditions with low stock levels.

When producing a single-layer concrete pavement, it is preferably pre-compacted before the steel inserts are inserted. This measure ensures that the vibrated steel inserts with feet maintain their position even with strong, subsequent compression and smoothing vibrations.

The invention also relates to a steel insert setting device, in particular dowel setting device, for carrying out the above-mentioned method with a lowering and vibrating device for inserting the steel insert into the concrete pavement. In a known dowel setting device of this type, the dowels are thrown from a leading settling device onto the top of the base layer and then pressed down into the concrete by fork-like supports of the lowering and vibrating device. The leading settling device can be dispensed with without a significant increase in operating effort if the lowering and vibrating device is provided with at least one steel insert holder which can be moved into an equipping position. In the loading position, the steel inserts may be inserted by hand into the steel insert holders, which hold them until they have been sunk into the concrete to the intended height. Steel inserts with feet can easily be shaken in this way, whereas this is only possible to a very limited extent in the known dowel setting device.

A particularly simple operation is ensured if the at least one steel insert holder can be pivoted about a horizontal axis. The steel insert holder is preferably formed with a preferably pneumatically actuated holding pliers.

Since the lowering and vibrating device is exposed to strong mechanical loads (vibrations!) And dirt loads during operation, the simple, robust construction is crucial. This is ensured if, as proposed according to the invention, a plurality of steel insert holders are arranged next to one another on a horizontal support which can be connected to a frame of the steel insert setting device via at least one column parallelogram. The desired pivoting movement about the carrier axis for moving the steel insert holders into the loading position can be made possible by an adjustment device for the support parallelogram angle. The adjustment device can comprise a double-arm link, one of the arms being articulated with a support of the support parallelogram and the other arm with a preferably hydraulically adjustable adjustment rod.

In a further development of the invention, at least one stop element is provided in the area of the steel insert holder for the stand (s) attached to the steel insert.

The invention also relates to a steel insert with at least one base for carrying out the specified method. It will. proposed that the base is formed by a bent wire construction. Such a stand is inexpensive to manufacture.

According to the invention, it is provided that the steel insert can be attached, preferably attached, to the at least one pedestal from above. In the case of a steel insert holder which temporarily holds the steel insert, there is the possibility with a stand of this type the latter from the later underside of the steel insert, to be attached to it, the stop elements provided in the area of the steel insert holder for the base fixing it in the intended position. The stop elements can, for example, engage laterally on the merely plugged-on feet and thus prevent their rotation around the steel insert, which may be in the form of a rod.

The invention is explained below with reference to the drawing of a preferred embodiment.

• Fig. 1 eine teilweise geschnittene, vereinfachte Seitensicht eines erfindungsgemäßen Dübelsetzgeräts als Teil eines im übrigen nicht dargestellten Gleitschalungsfertigers;
• Fig. 2 eine vereinfachte perspektivische Ansicht einer Haltezange des Dübelsetzgeräts gemäß Fig. 1 (Pfeil II in Fig. 1);
• Fig. 3 eine erfindungsgemäße Ausführungsform eines Standfußes; und
• Fig. 4 den prinzipiellen Querschnitt einer Straßendecke im Bereich eines Dübels.

It shows:

• Figure 1 is a partially sectioned, simplified side view of a dowel setting device according to the invention as part of a slipform paver, not otherwise shown.
• FIG. 2 shows a simplified perspective view of holding pliers of the dowel setting device according to FIG. 1 (arrow II in FIG. 1);
• 3 shows an embodiment of a pedestal according to the invention; and
• Fig. 4 shows the basic cross section of a road surface in the area of a dowel.

The dowel setting device, generally designated 10 in FIG. 1, forms part of a slipform paver (not shown in the rest), the basic structure of which is described, for example, in DE-OS 30 32 495. The dowel setting device 10 is provided at the rear end of the slip circuit paver moving in direction A (to the left in FIG. 1). In Fig. 1, a caterpillar 12 is indicated with a broken line, either on the formation 14 runs or on auxiliary banquets or rails provided on the side.

An essential part of the dowel setting device 10 is a box-shaped carrier 16 running transversely to the direction of travel, on which a row of holding pliers 18 are arranged side by side, one of which is shown schematically in FIG. 2. The carrier 16 is supported at both ends via a column parallelogram 20 at one end of a swivel arm 22, the other end of which is articulated on a vertical support column 24. The two columns 24 are rigidly attached to a frame 26 of the dowel setting device. Both the column parallelogram 20 and the swivel arm 22 (at both ends of the support 16) pivot in a vertical plane parallel to the direction of travel A.

A double-acting hydraulic cylinder 28, which is supported on the frame 26, engages on the swivel arm 22. By appropriate actuation of the hydraulic cylinder 28, the swivel arm 22 pivots out of its horizontal starting position shown in FIG. 1 either downward into a lower end position (not shown) or into an upper end position 22 'indicated by a broken line.

The column parallelogram 20 consists of two columns 20a and 20b. The support 20a is hinged at its upper end directly to the pivot arm 22 and at its lower end to a bearing block 16a on one side (in FIG. 1 the top) of the carrier 16. The other end 20b is at its lower end to a bearing block 16b articulated on an adjoining side of the carrier 16 (the left, vertical side in FIG. 1). The upper end of the support 20b is articulated on an arm 30a of a bent double-arm link 30, which is articulated in the region of the kink on the swivel arm 22 with a swivel axis 32, which swings axis of the support 20a coincides. The other arm 30b of the double arm link 30 is connected via an adjusting rod 34 to an arm 36a of a second bent double arm link 36. This link 36 is articulated on the support column 24, the pivot axis 38 coinciding with the pivot axis of the pivot arm 22 on the support column 24. A second double-acting hydraulic cylinder 40, which is supported on a projection 42 of the support column 24, engages the other arm 36b of the link 36. The two links 30 and 36 thus pivot in a common vertical plane parallel to direction A; the adjusting rod 34 forms a rigid coupling between the two links 32 and 36. During operation, the link 36 assumes two end positions, the normal position shown in FIG. 1 with a solid line and the end position 36 'indicated by a broken line, which is called the loading position in the following becomes.

The above-described type of mounting of the carrier 16 via the support parallelogram 20 and the swivel arm 22 using two links 32 and 36 and an adjusting rod 34 enables the carrier 16 to move relative to the swivel arm 22 and the unmoved links 30 and 36 relative to it Frame 26 moves, its angular orientation in space not changing due to the column parallelogram 20. As will be explained in more detail below, the carrier 16 can be stationary with respect to the formation 14 during the lowering process, during which the slipform paver continues to travel in direction A. With increasing distance a between support 16 and frame 26, the supports 20a and 20b holding the support 16 pivot around the trestles 16a and 16b of the support 16 (counterclockwise in FIG. 1). Strength in _F. 1, such a relative position 16 ″ of the carrier 16 relative to the frame 26 is indicated by dash-dotted lines.

By appropriate actuation of the hydraulic cylinder 28, the arm 22 can be inserted into a concrete layer 48 above the formation 14 for countersinking dowels 46 provided with feet 44. For this purpose, the arm 22 is gradually lowered into its lower end position.

If, in the upper end position 22 'of the swivel arm 22, the handlebar 36 is pivoted into its fitting position 36' by corresponding actuation of the hydraulic cylinder 40, the handlebar 30 swings accordingly into the position 30 '. This has the consequence that the carrier 16 is pivoted in such a way that, in addition to a slight displacement, it undergoes a rotation about its longitudinal axis through an angle of approximately 95 ° (clockwise in FIG. 1). In this position of the carrier 16, which is designated as the mounting position 16 ′, the dowels 46 are inserted into the dowel setting device 10 by hand, as will be explained in the following.

The basic structure of the holding tongs 18 is shown in FIGS. 1 and 2. It can be seen that on two opposite sides of the carrier 16 are welded to these sheet metal tabs 50, which protrude in the same direction over an intermediate carrier side. With the interposition of a rubber element 52, retaining tabs 54 of the pliers 18 are fastened to the tabs 50. The tabs 54 are elongated in the direction perpendicular to the longitudinal axis 58 of the support and are provided at their end remote from the support 16 with a receiving groove 60 adapted to the diameter of the rod-shaped cylindrical dowel 46. The two grooves 60 are aligned with one another. Staggered inwards at a short distance from the grooves 60, the two tabs 54 are welded to the two ends of a bolt 56. In an extension of this bolt 56 (2 the underside in _F ig.) (The lower bracket in Fig. 2) is on the other side one of the two lugs 54 welded to a pin piece 62, which in turn at its free end with an end plate 64. is welded. The end plate 64 protrudes so far beyond the two tabs 54 that a dowel 46 inserted into the grooves 60 can be pushed up to the end face contact with the plate 64. On the upper flap 54 in FIG. 2, a bolt piece 66 is in turn welded on as an extension of the bolt 56. This serves as a pivot bracket for a swivel plate 68 with a swivel axis parallel to the support axis 58. For this purpose, the plate 68 is provided with tabs 69a which protrude downward in a U-shape and which comprise the bolt piece 66 on two opposite sides. For pivoting the plate 68 relative to the parts 54, 56, 62, 64, a double-acting hydraulic cylinder 70 (see FIG. 1) is provided, which is supported on the one hand on the end of the plate 68 near the support and on the other hand on the lower tab 54 To simplify the illustration, instead of the hydraulic cylinder in FIG. 2, only a double arrow C is drawn, which symbolizes a line of force. For reasons of space, the cylinder 70 engages lateral projections 54a and 68b of the lower tab 54 or the plate 66. In order to save weight, a spacer 71 running in the cylinder direction can be provided between the hydraulic cylinder 70 and, for example, the lower projection 54a. From Fig. 1 it can be seen that with a corresponding actuation of the hydraulic cylinder 70 ', the plate 68 can be pivoted back and forth in the direction of the double arrow D.

• Auf dem vorbereitetem Planum 14 wird mit Hilfe des vorderen, nicht dargestellten Teils des Gleitschalungsfertigers eine Betonschicht 48 des Oberbaus hergestellt, wobei beim sogenannten "Einbau von vorne" das Einbaumaterial z. B. mittels Lastwagen vor den Gleitschalungsfertiger abgeworfen werden kann. Ein hin und her bewegbarer Verteiler an der Front des Gleitschalungsfertigers sorgt für eine gleichmäßige Verteilung des Einbaumaterials über die gesamte.Fahrbahnbreite. Ein anschließend angeordneter Vorabstreifer dosiert das Einbaumaterial in d.en nächstfolgenden Abschnitt in welchem sich Rüttlerflaschen befinden" d.ie das Einbaumaterial flüssig machen und dabei verdichten. Anschließend gelangt das Einbaumaterial unter eine horizontale Druckplatte, die eine obere Gleitschalung darstellt. Nun folgt zum hinteren Ende des Gleitschalungsfertigers hin das Dübelsetzgerät 10 gemäß Fig. l. In der in Fig. 1 mit unterbrochener Umrißlinie angedeuteten Bestückungsstellung 16' des Trägers 16 (Arm 22 in seiner oberen Endstellung 22'; Lenker 36 in seiner Bestückungsstellung 36') werden die vorgesehenen Dübel 46 in die Zangen l8 eingesetzt. Hierzu sind die jeweiligen Schwenkplatten 68 durch entsprechendes Einziehen des Kolbens des doppelt wirkenden Hydraulikzylinders 70 zurückgeschwenkt (in Richtung E in Fig. 1). Die Dübel 46 können daher von den Platten 64, 68 ungehindert in die beiden Nuten 60 der jeweiligen Zange 18 eingesetzt werden. In seiner Bestückungsstellung 16' ist der Träger 16 soweit zurückgeschwenkt, daß die Dübel 46 in den Nuten 60 bleiben unter Anschlag an der unteren Platte 64, wenn man sie losläßt. Im Falle der Verwendung relativ schwerer Standfüße 44 bedeutet dies, daß der Träger 16 in seiner Bestückungsstellung 16' noch weiter in Richtung des Uhrzeigersinns gemäß Fig. 1 verschwenkt ist. Die Standfüße 44 des in die Nuten 60 eingesteckten Dübels 46 müssen vom Träger 16 wegweisen also radial nach außen in bezug auf die Trägerachse 58 _ver- laufen. Um diese Orientierung sowohl beim Bestücken als auch beim anschließenden Einrütteln in die.Schicht 48 sicherzustellen, können seitliche Anschlagsleisten 74 an jeder Zange 18 vorgesehen sein. In Fig. 2 ist strichliert eine zur Richtung des Bolzens 56 parallele, seitlich und vom Träger 16 weg versetzt angeordnete Anschlagsleiste 74 angedeutet, welche über einen Knickarm ₇6 am Bolzen 64 angebracht ist (siehe auch Fig. 1 rechts unten ). Eine weitere derartige in Fig. 2 nicht dargestellte Anschlagsleiste 74 befindet sich auf der in Fig. 2 rechten Seite der Zange 18 in symetrischer Anordnung zur dargestellten Leiste 74 in bezug auf die zur Trägerachse 58 senkrechte, die Längsrichtung des Bolzens 56 enthaltenden Mittelebene der Zange 18.

The mode of operation of the dowel setting device 10 described above is explained below:

• On the prepared level 14, a concrete layer 48 of the superstructure is produced with the help of the front, not shown part of the slipform paver, with the so-called "installation from the front" the paving material z. B. can be dropped by truck in front of the slipform paver. A back and forth movable distributor on the front of the slipform paver ensures an even distribution of the paving material over the entire width of the road. A pre-scraper arranged afterwards doses the paving material in the next section in which there are vibrating bottles "that make the paving material liquid and thereby compress it. Then the paving material passes under a horizontal pressure plate, which represents an upper sliding formwork. Now follows to the rear end of the slipform paver, the dowel setting device 10 according to FIG. 1. In the loading position 16 'of the carrier 16 (arm 22 in its upper end position 22'; handlebar 36 in its loading position 36 ') indicated by the broken outline in FIG. 1, the provided dowels 46 into the pliers 18. For this purpose, the respective swivel plates 68 are swiveled back by appropriately retracting the piston of the double-acting hydraulic cylinder 70 (in the direction E in Fig. 1). The dowels 46 can therefore be unhindered by the plates 64, 68 in the two grooves 60 of the respective pliers 18. In its assembly position 16 ', the carrier 16 is pivoted back so far that the dowels 46 remain in the grooves 60 under the stop on the lower plate 64 when they are released. In the case of the use of relatively heavy feet 44, this means that the carrier 16 in its loading position 16 'is pivoted even further in the clockwise direction according to FIG. 1. The feet 44 of the plugged into the grooves 60 from the plug 46 must support 16 thus face away radially outwardly with respect to the support shaft 58 _ver - run. In order to ensure this orientation both when loading and when subsequently shaking into the layer 48, lateral stop strips 74 can be provided on each pair of pliers 18. In Fig. 2 is dashed a parallel to the direction of the bolt 56, laterally and offset from the carrier 16 arranged Stop bar 74 indicated, which is attached to the bolt 64 via an articulated arm ₇ 6 (see also FIG. 1, bottom right). Another such stop bar 74, not shown in FIG. 2, is located on the right side of the pliers 18 in FIG. 2 in a symmetrical arrangement with the bar 74 shown in relation to the central plane of the pliers 18, which is perpendicular to the support axis 58 and contains the longitudinal direction of the bolt 56 .

After all dowels 46 including feet 44 have been inserted into the open pliers 18, the pliers 18 are closed by corresponding actuation of the hydraulic pistons 70. Now both plates 64 and 66 press against the front ends of the dowels 46, as a result of which the dowels are reliably held in place.

The equipment can, however, with attachable feet 44 z. 3 in such a way that the dowels without feet are first inserted into the grooves 60, then the pliers 18 close and only then the feet are attached.

The carrier 18 equipped with dowels in this way is now brought into its initial position, shown in FIG. 1 with a solid line, in which the dowels 46 are located just above the concrete layer 48 and the feet 44 are already in their correct orientation. In order to achieve this starting position, the hydraulic cylinder 40 only has to be brought into its normal position with the piston rod retracted, as a result of which the support 16 pivots counterclockwise and the dowels 46 assume a horizontal position below the support 16. Furthermore, the swivel arm 22 can be returned to its starting position. The dowel setting device 10 is now ready for the insertion of dowels 46. As soon as one by side markings Known point of the carriageway is reached, at which a groove is later to be milled into the finished carriageway, the hydraulic cylinder 28 lowers the arm 22, so that the dowels 46 dip into the not yet consolidated layer 48 with the feet 44 ahead. In the Fig. Not shown vibrating drives, which either engage the carrier 16 or the pliers 18, set the pliers 18 and thus the dowels 46 in shaking motion, whereupon the concrete surrounding them becomes fluid and further penetration of the dowels 46 does not cause any greater resistance opposed. To fix the support 16 in the intended position just above the future joint, feet can be extended at both ends of the support, which are supported on the side strips on both sides of the finished layer 48 with constant force during the lowering of the support 16. In the meantime, the slipform paver continues to move, so that the distance a according to FIG. 1 between the frame 26 and the carrier 16 increases with the corresponding pivoting of the supports 20a, 20b. The hydraulic cylinder 28. while the swivel arm 22 is continuously pulled down. As soon as the feet 44 have reached the formation ₁₄ , the holding tongs 18 are opened and the swivel arm 22 is pivoted upwards, whereupon the carrier 16 swings back into its starting position. To prepare the next row of dowels, the carrier 16 is pivoted up into its loading position 16 ′, whereupon the process described above is repeated.

In a subsequent manufacturing process, an upper concrete layer 80 is applied to the lower layer 48 provided with dowels. With a thickness b of the lower layer of approximately 14 cm and a thickness c of the upper layer 80 of approximately 6 cm, the dowels 46 become at a height h of approximately 10 cm above the level 14 built-in. The dowels 46 consist of steel rods with a length of about 50 mm and a diameter of about 25 mm, which are covered with a 1 mm thick bitumen or plastic layer. After completion of the concrete ceiling, the joint 84 indicated by a broken line in FIG. 4 is milled into the ceiling to a depth d of approximately 7 cm. The roughly 6 to 8 mm wide joint 84 runs in the area of the center of length of the dowels 46 which are arranged next to one another in the transverse direction of the carriageway and are parallel to the carriageway direction. Fig. 3 shows a further preferred embodiment of a base 44 ', which is bent from a single piece of wire, in particular in that the wire is bent first as a U-shape with a short middle leg 86 and two long side legs 88 and then the side legs in the same way, in two mutually parallel planes perpendicular to the central leg 86, bends a second time in a U-shape (see FIG. 3). The two middle parts 90 of the two side leg U-shapes are also each provided with an indentation 92 in the area of their center length, which opens outwards. As shown in FIG. 3, the cylindrical dowel 46 can be pressed simultaneously into both indentations 92, which then hold the dowel 46 in a clamping manner. The middle leg 86 and the two bent free ends of the side legs 88 are on the ground z. B. on the level 14. The base 44 ¹ can be easily attached to the dowel 46 held by the closed pliers 18. The stop strips 74 are not a hindrance, since the push-on movement takes place in the radial direction with respect to the support axis 58.

The dowels provided with the feet can also be used in the manner described above Manufacturing of road surfaces in single-layer construction can be used. It is advisable to pre-compact the single layer of concrete before inserting the dowels, in particular by appropriate vibrating treatment, to ensure that when the single base layer is subsequently smoothed by vibrating planks, vibrating bottles or the like, the dowels resting on the base feet are not knocked over.

Claims (14)

1. A process for the production of a concrete road surface consisting of several concrete layers, whereby after the production of one or more layers, steel inserts, in particular dowels, are pressed into the not yet hardened layer and pushed forward to a predetermined height above the formation, with vibration characterized in that steel inserts are shaken, which are provided with the predetermined height correspondingly formed feet. 2. The method according to claim 1, characterized in that one attaches the feet immediately before shaking on the steel inserts, preferably infected. 3. The method according to claim 1 or 2, characterized in that for the production of a concrete pavement with only one layer, the layer is pre-compressed before the steel inserts are inserted. 4. Steel insert setting device, in particular dowel setting device, in particular for performing the method according to one of claims 1 to 3, with a lowering and vibrating device for inserting the steel inlays into the concrete pavement, characterized in that the lowering and vibrating device with at least one steel insert holder (18) is provided, which is movable into an assembly position. 5. Steel insert setting device according to claim 4, characterized in that the at least one steel insert holder (18) about a horizontal axis (58) is pivotable. 6. Steel insert setting device according to claim 4 or 5, characterized in that the steel insert holder is formed with a preferably pneumatically actuated holding pliers (18). 7. Steel insert setting device according to one of claims 4 to 6, characterized by a plurality of steel insert holders (18) arranged next to one another on a horizontal support (16), preferably elastically resiliently mounted. 8. steel insert setting device according to claim 7, characterized in that the carrier (16) via at least one support parallelogram (20) with a frame (26) of the steel insert setting device (10) is connected, and that an adjusting device (30, 34, 36, 40) is provided for the column parallelogram angle. 9. Steel insert setting device according to claim 8, characterized in that the adjusting device (30, 34, 36, 40) comprises a double arm link (30), one of the arms (30a) with a support (20b) of the support parallelogram (20) and the other Arm (30b) is pivotally connected to a preferably hydraulically adjustable adjusting rod (34). 10. steel insert setting device according to claim 9, characterized in that the adjusting device (30, 34, 36, 40) comprises a second double arm (36), one of the arms (36a) with the adjusting rod (34) and the other arm (36b) with an adjusting motor, preferably a hydraulic cylinder (40), and that the first double arm link (30) at the free end of a frame (26) of the steel insert setting device (10) articulated arm (22) and the second double arm link (36) in Swivel arm joint (axis 38) is articulated. 11. Steel insert setting device according to one of claims 4 to 10, characterized in that in the area of the steel insert holder (18) at least one stop element (74) is provided for the one or more attached to the steel insert (46) feet (44). 12. Steel insert with at least one stand for carrying out the method according to one of claims 1 to 3, characterized in that the stand (44 ') is formed by a bent wire construction. 13. Steel insert according to claim 12 or the preamble of claim 1 ₂ , characterized in that the steel insert (46) from above on the at least one Stand (44 ') can be attached, preferably plugged on. 14. Steel insert according to claim 12 or 13, marked by a respective base (44) in the regions of the two ends of the rod-shaped steel insert (46).

Images