EP3228748B1 - Road finisher with holding device - Google Patents

Description

The present invention relates to a paver with a holding device according to the preamble of claim 1.

In practice, road pavers are used to obstruct new road surfaces by means of a screed arranged thereon. The installation material for this comes from a Gutbunker the paver, which is arranged in the direction of installation front of the paver. About a material conveyor the built-in material from the Gutbunker is transported back to the screed, spread out before this by means of a distribution screw and finally installed under the screed by means of heated compression units for new roadway.

So that a flat road surface on the ground, on which the paver moves, can be installed, the screed is attached by means of height-adjustable piles on the chassis of the paver. The leveling of the screed can be controlled by a controller of the paver. The leveling of the screed depends on the surface condition of the substrate or on the desired thickness of the pavement to be paved.

It is known that for leveling the screed of a paver a Meßbalkenvorrichtung is used laterally along the paver for days of a variety of height measuring sensors above the ground and behind the screed in practice. On the basis of the measurement results of the height measuring sensors, a leveling of the screed can then be carried out.

For example, shows DE 602 26 237 T2 a measuring beam device with superimposed beams telescopically extendable along the paver to position laterally of the paver above the ground sensors for a height measurement. The respective telescopic beam segments can be fixed at a desired location by anchors provided thereon. In addition, the respective height positions of the sensors can be adjusted. The disadvantage of this is that the telescoping measuring beam apply a high weight and therefore can only be used on special types of road pavers. In addition, several persons are required for mounting on or dismantling the measuring beam device from the paver. In addition, the possibilities for height adjustment of the sensors are limited.

US 5,975,473 A discloses a measuring beam device mounted laterally on a paver. The measuring beam device is attached via articulated pivot arms to a screed spar of the paver. Furthermore, the measuring beam device comprises a measuring beam carried laterally along the paver with a center beam and expansion beams attached to its ends. Height measuring sensors are arranged on the center beam as well as on the extension bar. The respective extension beams can be pivoted inwards relative to the center beam in the horizontal plane, so that the rear of the paver on the attached rear extension bar sensor is positioned above the newly installed installation layer behind the screed. In this measuring beam device, the respective articulated segments are coupled by means of threaded screw connections. An assembly is therefore very expensive and time-consuming. In addition, different clamping forces act on the respective threaded screw connections, which ultimately depends on the operator setting the holding device. This complicates the mounting and adjustment of the fixture and makes them not easy to install for everyone. In addition, it is not uncommon in such a complex measuring beam device that individual components, especially loose screw levers, screws and brackets are lost on the job site. Finally, with this measuring beam device, the possibilities for setting respective height positions for the sensors are limited.

DE 691 26 017 T2 discloses a paver with a measuring beam attached thereto which is rigid and positioned laterally of a screed of the paver above the ground. The disadvantage of this is that because of the rigid design of the measuring beam this particular can be used only on a limited number of road pavers.

In view of the conventional solutions according to the prior art, it is the object of the invention to provide a paver with a holding device, which is suitable for a particularly flexible use for use on different types of road pavers, characterized by a simple and fast mountability on the paver and in addition for a variety of mounting options for attached modules, especially measuring units, can be used.

A paver with such a holding device gives claim 1 ago. Improved developments of the invention are the subject of the dependent claims.

The paver according to the invention comprises a height-adjustable screed for laying a built-in layer and at least one holding device for carrying and positioning at least one sensor unit. The holding device comprises a center bar, at least an extension beam for the center beam and at least one attachment unit releasably securing the extension beam to one end of the center beam. The middle beam and the extension beam are viewed by means of the fastening unit in a vertical projection plane relative to each other in a first mounting bracket connected to each other. According to the invention, the middle beam and the extension beam can be connected to one another in at least one further mounting angle, viewed in a vertical projection plane, by means of the fastening unit.

There are thus at least two mounting options for the extension bar at the end of the central bar, so that the holding device can be specially assembled depending on the application. This results in the possibility that the holding device can be used easily on different types of road pavers in order to position the sensor unit carried thereon at a variable height above the ground or above the newly installed built-in layer, depending on the intended use.

In the case of the invention, the sensor units used on the holding device can be aligned as desired with respect to different measuring references or measuring positions, depending on the application. Thereby, the holding device can be used depending on the customer in a variety of applications. In particular, in the invention, the respective sensors can be positioned in a particularly diverse manner. In the invention, the fastening unit is configured for different ways of assembling the middle beam and the extension beam. Consequently, the possible applications for the holding device expand, in which case it can be used in particular as a standard module on different types of road finishers. Due to the adjustability in the vertical plane, the holding device can be used excellently on both large and small pavers. This also favors the use of different sensor types. Preferably, in the holding device, the respective legs and vertices of the first and the further mounting angle lie in a vertical plane.

Preferably, the holding device comprises at least one additional extension bar and a further attachment unit, wherein the additional extension bar is releasably secured to another end of the center bar or to the already existing extension bar by means of the further attachment unit. Due to the additional extension bar, the holding device can be extended to a sufficiently long length in order to obtain a large measuring section above the ground by means of the holding device.

In the invention, viewed in a horizontal extension and a vertical projection plane different Tragarmmodule be assembled and expanded as desired. In particular, an extension bar extending beyond the middle bar and up to free ends of the extension bars of linear support beams coupled thereto and a step-shaped support beam module comprising expansion bars arranged offset from each other in the vertical plane can be assembled. Conceivable, however, would be an assembly with two step-like extensions forward and backward leader viewed from the central beam to carry the foremost and rearmost expansion beam close to the ground. The middle beam could be considered in such a variant in the vertical plane offset upwards, in particular attach horizontally to the paver.

According to a further embodiment, the two extension beams can be fastened parallel to one another at the ends of the middle beam at a certain distance from one another. As a result, the two extension bars form a step shape together with the center bar, with the extension bars extending at a certain distance from one another. Due to this beam combination, sensors of the sensor unit can be positioned in a particularly versatile manner at different heights relative to the ground or laid pavement. In particular, the sensors behind the screed could be easily positioned at a prescribed minimum height above the hot pavement. This could better protect the sensors behind the screed from rising fumes and heat. The step shape also favors that a sensor unit above the ground, on which moves the paver, can be positioned at the same height distance as another sensor unit on the newly installed installation layer.

However, the stepped construction, especially when installing large paving widths has the significant advantage that the holding device does not collide with other components of the road paver, such as screed extraction parts, channel plates and / or brackets for it. When installing large paving widths Ausziehteile the screed and / or channel plates, which are seen in terms of lateral distribution screws in the direction of travel are arranged in front of the exhaust parts, are fixed vertically and horizontally by means of cantilevered support rods. The step structure of the holding device allows the use of such support rods, wherein the holding device itself is not disturbed by the support rods in their function. According to a further variant of the invention, the center beam on a screed spar or on a side shifter of the screed, in particular on a side shifter of a Bohlenausziehteils attached to widen the screed. Attached to the sideshifter, a movement of the screed beams would at least not act directly on the holding device. An attachment The holding device on the side slider would also have the advantage that the holding device, regardless of whether it is assembled stepwise or rectilinear, does not get in the way of the above-mentioned support bars.

Attached to the screed, the height measurements could be made closer to the paver. Preferably, the respective fastening unit comprises a Einhängemaul and a locking plate. The locking plate can be easily and quickly hang on the hanger of the attachment unit for positioning it and secure. In addition, neither the hanger nor the lock plate for coupling the same loose components, which favors the use on site.

Particularly fast and stable, the locking plate and the Einhängemaul then align each other in a desired assembly position, if a plurality of bolts are formed on the locking plate hook and on Einhängemaul for hooking the hook. A wrong assembly is therefore not possible. In addition, the assembly can be done without tools.

For stably aligning an extension beam to the center beam or two extension beams to each other, the hanger mouth of the respective attachment unit includes first and second sidewalls, the bolts extending between the sidewalls. The two side walls to some extent forms a guide for the locking plate so that it is properly coupled to the hanger. In this case, the two side walls can prevent an adjustment taking place in a horizontal plane between the center beam and an extension beam attached thereto or between two adjacent expansion beams. The holding device can therefore be seen in the installation direction on the horizontal projection plane rigidly carried along the side of the paver.

An assembly of the extension bar at one end of the central bar and / or an assembly of two extension bars in the first and in the further mounting bracket can be easily carried out in particular if the hanger comprises a first and a second group of bolts, wherein by coupling the hook the locking plate on the first group of bolts of the middle beam and the extension beam are interconnected by the first mounting bracket, and wherein by coupling the hook of the locking plate to the second group of bolts the center beam and the extension beam are interconnected by the further mounting bracket. In this regard, the extension bars can also be coupled together. The used depending on the assembly Group of bolts and the attached hooks make it much easier for an operator, even without additional assistance from another person to properly attach the holding device to the paver.

A further variant provides that the center beam has the Einhängemaul at both ends and the extension bar at one end comprises the locking plate for coupling with one of the Anhängemäuler the center bar. If the center beam is already fastened to the paver during assembly of the holding device, expansion bars can be effortlessly mounted, aligned and locked at its ends.

The versatile expansion possibilities of the center beam come about in particular by the fact that on him the two Einhängemäuler are mirror images of each other formed at the ends of the central bar. The two Einhängemäuler are arranged primarily relative to each other by a Gleitspiegelung at the ends of the central bar. Thereby, the respective groups of bolts at the respective ends of the central bar can be arranged offset from each other in such a way that at both ends of the central bar, an extension bar can be mounted both in the first and in the further mounting bracket. The holding device can thereby be converted quickly between a rectilinear and a step-like coupling of the respective beams to each other.

The extension bar preferably has a hanger or a further locking plate at its end facing away from the middle beam. In the former embodiment, it is easy to hook and align a locking plate of another extension beam thereto. This can be done easily by an operator.

Preferably, the first mounting angle is 180 ° and the other mounting angle is an obtuse angle. As a result, the support beam module can be assembled in particular in a straight-line coupling and in steps. These composite options are particularly suitable for attachment to various types of screed, in particular to the specially designed screed beams.

Preferably, the attachment unit for securing the extension beam to the center beam comprises a locking pin movable between a locking position and a release position. Preferably, the locking pin can be positioned in the locking position so relative to a pin of the hanger, which is fixed to a hook hooked on the bolt. The release and locking of the locking bolt can be done quickly and easily without tools from one hand, which contributes to the overall improved ergonomics of the fixture.

Preferably, the locking pin is fixable in the release position. For example, the locking pin can be rotated in the release position to a release seat, whereby it can be prevented that the locking pin automatically moves back into the locking position.

Particularly safe, the locking pin can be kept in the release and in the locking position when it is biased in the locking position by means of a spring. The spring force on the locking pin securely holds the same in the locking position and also secures the locking pin on the release seat when it is in the release position. Preferably, the sensor unit comprises a plurality of sensors, each of which performs a distance measurement to the ground on which the road paver moves, and / or a distance measurement to the newly installed road surface behind the screed. The respective sensors are preferably designed as laser and / or ultrasonic sensors for this purpose. Based on the respective height measurements, an automatic leveling of the screed can be carried out by means of a control device provided in the paver in order to install a level new installation layer on the ground. The sensors can be positioned at different locations along the fixture. A height adjustability of the respective sensors is favored in particular by the present in a vertical projection plane adjustability of the holding device.

Preferably, the middle beam and / or extension beam is formed as an aluminum profile, in particular as an aluminum profile. As a result, the weight of the holding device can be kept low. In addition, it can be particularly well attached to other modules. Other materials are conceivable for the middle beam and / or extension beam. Preferably, the holding device is viewed from the top view rectilinear along the direction of travel of the paver. However, it would also be conceivable to form the holding device from the top view in the horizontal projection plane laterally stepped, whereby the two extension bars are viewed in the horizontal projection plane fixed to each other at a certain distance parallel to the middle beam. This would allow the sensors attached to the extension bars to be positioned laterally to the paver at different distances.

Fig. 1

einen Straßenfertiger gemäß der Erfindung mit daran befestigter Haltevorrichtung,

Fig. 2

einen vergrößerten Ausschnitt der Haltevorrichtung gemäß Fig. 1,

Fig. 3

einen Balkenverbund in stufenartiger Ausführung für die Haltevorrichtung,

Fig. 4

eine obere Kopplungsstelle für den Balkenverbund aus Fig. 3,

Fig. 5

eine untere Kopplungsstelle für den Balkenverbund aus Fig. 3,

Fig. 6

einen Balkenverbund in geradliniger Ausführung für die Haltevorrichtung,

Fig. 7

eine hintere Kopplungsstelle für den Balkenverbund aus Fig. 6,

Fig. 8

eine vordere Kopplungsstelle für den Balkenverbund aus Fig. 6,

Fig. 9

einen Sperrbolzen in Verriegelungsposition,

Fig. 10

den Sperrbolzen aus Figur 9 in Freigabeposition,

Fig. 11

eine Schnittdarstellung des Sperrbolzens in Verriegelungsposition und

Fig. 12

eine Schnittdarstellung des Sperrbolzens in Freigabeposition.

Embodiments of the invention will be explained with reference to the following figures. Showing:

Fig. 1

a paver according to the invention with a holding device attached thereto,

Fig. 2

an enlarged section of the holding device according to Fig. 1 .

Fig. 3

a beam composite in step-like design for the holding device,

Fig. 4

an upper coupling point for the beam composite Fig. 3 .

Fig. 5

a lower coupling point for the beam composite Fig. 3 .

Fig. 6

a beam composite in a straight line design for the holding device,

Fig. 7

a rear coupling point for the beam composite Fig. 6 .

Fig. 8

a front coupling point for the beam composite Fig. 6 .

Fig. 9

a locking pin in the locking position,

Fig. 10

off the locking pin FIG. 9 in release position,

Fig. 11

a sectional view of the locking bolt in the locked position and

Fig. 12

a sectional view of the locking pin in the release position.

The same components are provided throughout the figures with the same reference numerals.

FIG. 1 shows a paver 1 with a towed screed 2. The screed 2 is adapted to lay a new installation layer 3 on a substrate 8. The paver 1 further comprises a Gutbunker 4, from which built-in material is transported by means of a running in the paver 1, not shown conveyor conveyor belt to the rear to the screed 2 for the installation of the installation layer 3.

On a screed 5 of the screed 2, a holding device 6 is attached. The holding device 6 serves to carry and position at least one sensor unit 7. The sensor unit 7 is in particular configured to detect a distance to the ground 8 on which the road paver 1 moves. In FIG. 1 a total of three sensor units 7 are arranged on the holding device 6, wherein seen in the direction of travel F front two sensor units 7 each measure a distance to the ground 8 and the arranged at the rear end of the holding device sensor unit 7 'a distance to the new installation layer 3. Based on the height measurements to the substrate 8 and / or the new installation layer 3, the paver 1 can perform an automatic leveling of the screed 2 by means of a control device 33.

The holding device 6 comprises a first and a second pivot arm 9, 9 ', via which it is attached to the screed spar 5 of the paver 1. At the sides of the pile spar 5 outwardly offset ends of the respective pivot arms 9, 9 'is in each case a clamping device 10, 10' attached, which are designed as quick release and hold a central beam 11 of the holding device 6. The center beam 11 is oriented in the direction of travel F of the paver 1 forward inclined to the horizontal.

At a rear end 12 of the center bar 11 seen in the direction of travel F, an extension bar 13 for the center bar 11 is fastened. Viewed in a vertical projection plane, the center beam 11 and the extension beam 13 are interconnected relative to one another in a first mounting angle α. Further back on a side facing away from the central beam 11 end 14 of the extension bar 13, a further extension bar 13 'is fixed to carry the sensor unit 7' on the new installation layer 3. The two extension bars 13, 13 'are aligned horizontally relative to the substrate 8 or to the installation layer 3 laid thereon.

At a front end 15 of the middle beam 11 viewed in the direction of travel F, a front additional extension beam 16 is fastened, which is extended beyond its length by a further front extension beam 16 'on which the sensor unit 7 is supported above the ground 8. The center beam 11 and the front additional extension beam 16 are coupled relative to each other in a mounting angle α 'with each other, wherein the mounting angle α' and the first mounting angle α are changing angles, from which it follows that FIG. 1 the extension bar 13 and the front additional extension bar 16 are arranged parallel to one another as bar segments in the holding device 6.

FIG. 2 shows a section of the holding device 6 from FIG. 1 FIG. 2 shows that the middle beam 11 at its respective ends 12, 15 each comprise a fixing unit 18, 18 ', which couple the extension bar 13 and the additional front extension bar 16 to the ends 12, 15 of the central bar 11. In FIG. 2 the two extension bars 13, 16 are arranged in a stepped manner with the center bar 11 and are interconnected by the alternating or Z angles α, α '.

FIG. 3 shows only the step-like assembly of the central bar 11 with the attached at its respective ends 12, 15 extension bar 13, 16. The mounting angle α, α 'are as change angle, ie Z-angle, because the two extension bars 13, 16 extending parallel to each other the middle beam 11 are connected.

FIG. 4 shows in enlarged scale the fastening unit 18, which attaches the extension bar 13 at the rear end 12 of the center bar 11. The attachment unit 18 includes a hanger 19 formed on the center beam 11 and a lock plate 20 formed on the extension beam 13. The lock plate 20 of the extension bar 13 is fixed to the hanger mouth 19 of the center beam 11 such that the center bar 11 and the extension bar 13, when viewed in a vertical projection plane, are connected relative to each other in the first mounting angle α.

Further shows FIG. 4 in that the hanger 19 has a plurality of bolts 21 divided into a first group 22 and a second group 23 of bolts 21. The lock plate 20 has two hooks 24 secured to the first group 22 of bolts 21. Attaching the hooks 24, 24 'to the first group 22, 22' of bolts 21, 21 'on the respective fastening units 18, 18' causes a step shape to be formed between the center beam and the extension beam attached thereto (see FIGS. 4 and 5 ). The hanging on the second group 23, 23 'of bolts 21, 21', however, results in a straight beam composite (see FIGS. 7 and 8 ).

The in FIG. 4 On the locking plate 20 formed below hook 24 is secured against the lower bolt 21 of the first group 22 of bolts 21 by means of a locking bolt 25.

FIG. 5 shows a further fastening unit 18 ', which is formed at the front end 15 of the central beam 11. The fastening unit 18 'has at the front end 15 of the center bar 11 via a hanger 19', on which a locking plate 20 formed on the extension bar 16 'is mounted, which is secured by means of a locking pin formed thereon 25' on the hanger 19. In FIG. 5 is the Einhängemaul 19 'viewed in a vertical plane mirrored to Einhängemaul 19 from FIG. 4 educated. It is thereby achieved that the center bar 11 can be connected to the respective extension bars 13, 16 in a stepped and rectilinear manner. The locking plate 20 'off FIG. 5 includes analogous to FIG. 4 two hooks 24 ', which are attached to a first group 22' of bolts 21 'of the Einhängemauls 19'.

FIG. 6 shows the assembly of the center bar 11 with the two extension bars 13, 16 in a straight line embodiment. In this case, the center bar 11 and the extension bars 13, 16 are connected to one another in a further mounting angle β, β '. The further mounting angle β, β 'is according to FIG. 6 180 °, resulting in the straight beam composite.

The FIGS. 7 and 8 show the respective locking positions of the fastening units 18, 18 'according to FIG. 6 ,

In FIG. 7 the locking plate 20 is fastened with the hooks 24 provided thereon to the second group 23 of bolts 21 on the suspension mouth 19 of the central beam 11. In contrast to FIG. 4 comes through this mounting a straight-line assembly of the central bar 11 with the extension bar 13 corresponding to the other mounting angle β.

FIG. 8 shows the trained at the front end 15 of the central bar 11 mounting unit 18 ', where also the hooks 24' are attached to the second group 23 'of bolt 21'. As a result, the front end of the center bar 11 can also be connected in a straight line to the additional extension bar 16.

FIG. 9 shows the fastening unit 18 'from FIG. 8 in an enlarged view in the locked position. In this case, the locking pin 25 'with its front end 26' below the lower pin 21 'of the second group 23' of pin 21 'positioned to secure the hooked at this point above the pin 21' hook 24 'to the hanger 19' , The front end 26 'of the locking pin 25' is preferably tapered and in particular in a region directly below the pin 21 'formed chamfered, so that the locking pin 25' by engagement with the pin 21 'is not rotated when it is in the locking position.

FIG. 9 also shows that the locking pin 25 'is pressed by a spring 27' in the locking position.

FIG. 10 shows the locking pin 25 'from FIG. 9 in a release position. In the release position, the front end 26 'of the locking pin 25' below the bolt 21 'is moved away to the side to cancel a locking of the hook 24' on the bolt 21 '. In the release position, the extension bar 16 can be unhooked from the center bar 11. FIG. 10 also shows that the locking pin 25 'is retracted fixed in the release position on a release seat 28'. The locking pin 25 'can be for it by rotation about its bearing axis on the release seat 28' bring, whereupon the locking pin 25 'remains fixed by the spring force of the spring 27'.

FIG. 11 shows a sectional view of in FIG. 10 shown locking position of the locking pin 25 '. In FIG. 11 the locking pin 25 'is held with its head 29' and with its front end 26 'in a guide 30'. The spring 27 'pushes the front end 26' of the locking pin 25 'with the bevelled tip against the pin 21'. FIG. 11 shows also that the locking pin 21 'of the Einhängemauls 19' extends between a first side wall 31 'and a second side wall 32'. The first and the second side wall 31 ', 32' together form a stable receptacle and guide for the locking plate 20 'so that it can not swing in a horizontal plane. This ensures that the middle of the bar 11th fixed extension beam 16 viewed in the horizontal plane remains stable laterally positioned on the paver in the direction of travel F.

FIG. 12 shows the locking pin 25 'from FIG. 11 in the release position, wherein the head 29 'of the locking pin 25' in comparison to the locking position by 90 ° about the bearing axis is rotated on the release seat 28 'of the guide 30' is seated.

Although the holding device has previously been described exclusively on one paver, it can also be attached to other vehicles, for example to a paver feeder vehicle.

Claims (16)

1. Road paver (1) with a height-adjustable screed (2) for installing a pavement layer and at least one support device (6) for carrying and positioning at least one sensor unit (7), where said support device (6) comprises a center bar (11), at least one extension bar (13) for said center bar (11), and at least one attachment unit (18) which detachably attaches said extension bar (13) at one end (12) of said center bar (11), where said center bar (11) and said extension bar (13) are by way of attachment unit (18) relative to one another - when viewed in a vertical projection plane - at a first mounting angle (α) connectable to one another characterized in that said center bar (11) and said extension bar (13) are by way of said attachment unit (18) connectable to one another - when viewed in the vertical projection plane - at at least one further mounting angle (β).
2. Road paver according to claim 1, characterized in that said support device (6) comprises at least one additional extension bar (16) and one further attachment unit (18'), where said additional extension bar (16) is by way of said further attachment unit (18') detachably attached to another end (15) of said center bar (11).
3. Road paver according to claim 2, characterized in that said the two extension bars (13, 16) are attachable to said center bar (11) running parallel to one another at a defined distance (a).
4. Road paver according to one of the preceding claims, characterized in that said center bar (11) is attached to a screed beam (5) or to a side plate of said screed (2).
5. Road paver according to one of the preceding claims, characterized in that said respective attachment unit (18, 18') comprises a hook-in jaw (19, 19') and a locking plate (20, 20').
6. Road paver according to claim 5, characterized in that hooks (24, 24') are formed on said locking plate (20, 20') and on said hook-in jaw (19, 19') for hooking in said hooks (24, 24') several bolts (21, 21') are formed.
7. Road paver according to claim 6, characterized in that said hook-in jaw (19, 19') comprises a first and a second side wall (31', 32'), where said bolts (21, 21') extend between said side walls (31', 32').
8. Road paver according to claim 6 or 7, characterized in that said hook-in jaw (19) comprises a first and a second group (22, 23) of bolts (21), where said center bar (11) and said extension bar (13) are by coupling said hooks (24) of said locking plate (20) to said first group (22) of bolts (21) attached to each other by said first mounting angle (α), and where said center bar (11) and said extension bar (13) are by coupling said hooks (24) of said locking plate (20) to said second group (23) of bolts (21) connected to one another by said further mounting angle (β).
9. Road paver according to one of the claims 5 to 8, characterized in that said center bar (11) at its two ends (12, 15) comprises said hook-in jaw (19, 19') and said extension bar (13, 13') at one end comprises said locking plate (20, 20') for coupling to one of said hook-in jaws (19, 19') of said center bar (11).
10. Road paver according to claim 9, characterized in that said two hook-in jaws (19, 19') are configured to be mirror-inverted with respect to one another at said ends (12, 15) of said center bar (11).
11. Road paver according to one of the preceding claims, characterized in that said extension bar (13) comprises a hook-in jaw or a further locking plate at its end facing away from said center bar (11).
12. Road paver according to one of the preceding claims, characterized in that said first mounting angle (α) is an obtuse angle and said further mounting angle (β) is 180°.
13. Road paver according to one of the preceding claims, characterized in that said attachment unit (18) for securing said extension bar (13) to said center bar (11) comprises a locking bolt (25) which is movable between a locking position and a release position.
14. Road paver according to claim 13, characterized in that said locking bolt (25) can be secured in the release position.
15. Road paver according to claim 13 or 14, characterized in that said locking bolt (25) can by way of a spring (27) be pressed to the locking position.
16. Road paver according to one of the preceding claims, characterized in that said support device (6) can be assembled without tools.

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