EP3575491B1 - Road finishing machine with channel sheet extension - Google Patents

Description

The invention relates to a road paver, comprising at least one duct plate. Such a road paver is used to pave bound and unbound mixed materials for the production of pavements, see in particular roads. There is the possibility that a certain basic working width of the road paver is increased by means of a screw conveyor attached to the side. The corresponding screw conveyors or screw extensions are installed with channel plates. Such channel plates are mounted in the direction of travel in front of a corresponding screw shaft on a screw conveyor frame part or directly on the chassis of the road paver. Together with a screed, they form a so-called screw trough. The duct plates require a minimum distance from the ground or subgrade in order to avoid collisions with it. In the case of greater paving thicknesses, the distance between the duct plates and the subgrade is increased by adjusting the height of the auger or chassis.

With such known channel plates on the paver finisher, there is the possibility that mix flows from a screw space under the channel plates to the front in the direction of travel of the road paver. There this mixed material can cool down and thus worsen an installation result in the corresponding production of surface paving.

JP 2004-011347 A describes a side and height-adjustable sheet on a paver, which probably prevents material from escaping from the side.

CN 102 704 384 A describes a pre-scraper, which is arranged between auger and screed of a paver. Such a pre-scraper is used to compensate for the depth when the screed is extended.

U.S. 3,403,609 A describes a screw conveyor with a device arranged after this in the direction of travel, which device consists of an elastic material and is fastened to a lower end of a frame of a road paver.

EP 2 169 117 A1 describes a road finisher with the features of the preamble of claim 1.

DE 10 2010 004 785 A1 describes a road paver with a so-called tunnel plate, which is intended to limit a material space to the front in the direction of travel. Furthermore, a guide plate is provided which is vertically adjustable. This should essentially serve to maintain a target level of a material supply.

US 2014/064848 A1 describes a vertically adjustable plate which is adjustable between two positions, whereby a distribution of an asphalt material or its defects is determined
The EP 1 120 495 A1 also describes a paver with duct plates.

The invention is based on the object of preventing such a flow of mix forwards in the direction of travel and at the same time improving the efficiency of the screw conveyor by forming a geometrically defined screw trough.

To achieve the object, a road paver with the features of claim 1 is proposed. The channel plate of the road paver is characterized in particular by the fact that a channel plate extension is arranged on the channel plate so that it can be adjusted in the direction of the subgrade. This prevents the mix from flowing out of the auger space under the channel plates and forward in the direction of travel. In addition, this channel plate extension creates a geometrically defined screw trough between the screw conveyor and the channel plate. At the same time, the adjustability of the duct plate extension ensures that, during installation, a material flow in the direction of travel is safely reduced to the front, but that the required ground clearance for the paver is not undercut during transport.

In a first exemplary embodiment, the duct plate extension is designed, for example, as a flap extension pivotably mounted on the duct plate. In other words, the flap extension can be pivoted in such a way that, for example, according to the distance between the duct plates and the subgrade the mix is prevented from flowing out of the screw chamber. At the same time, the required ground clearance for the paver can be set during transport.

In the simplest case, the flap extension can be mounted pivotably essentially at the lower end of the duct plate. This essentially results in a uniform surface made of duct sheet with a corresponding flap extension. There is also the possibility that the flap extension is pivotably mounted at a distance from the lower end of the duct plate.

In the above-mentioned case, it is also advantageous if a pivot axis connects the duct plate and the flap extension. This can extend along the lower end of the duct plate.

In order to be able to arrange the flap extension accordingly in different positions, the flap extension can be connected in particular to a rear side of the duct plate via an adjustable hinge mechanism.

Such a joint mechanism can also be actuated electrically or hydraulically. In another case, the joint mechanism has a joint rod and an articulation flange protruding from the flap extension, on which the joint rod is pivotably mounted. By appropriately actuating the articulated rod, the flap extension can then be arranged in different inclined positions relative to the duct plate via the articulation flange.

For a simple arrangement of the articulated rod on the duct plate, the articulated rod can be fixable on a retaining bracket protruding from a rear side of the duct plate in at least one folded-in and one unfolded position. In the folded position, the flap extension is swiveled back so that essentially only the channel plate interacts with the screw conveyor. In the unfolded position, the flap extension complements the duct plate. Different intermediate positions between the folded and unfolded position are also conceivable.

In order to mount the joint rod on the retaining bracket in a simple manner, the retaining bracket can have two spaced-apart bracket parts, between which the joint rod is arranged. It can also prove to be advantageous if the articulated rod has a number of positioning openings, by means of which different relative positions of the articulated rod and retaining bracket are defined.

For different fixing, also at a distance from the rear of the duct plate, it can also prove to be advantageous if the retaining bracket has at least two pairs of fixing openings which are spaced apart from one another essentially perpendicular to the rear of the duct plate, with which the positioning openings are aligned in the different relative positions and in which a fixing means engages. The fixing means is used to secure the various relative positions by engaging in fixing opening pairs and corresponding positioning openings.

In order to be able to pivot the articulated rod together with the hinged flap extension in a simple manner, the articulated rod can have a handle at its upper end. In this context, it can also prove to be advantageous if, if necessary, the articulated rod has a lower articulation section inclined in the direction of the articulation flange and a positioning section extending essentially vertically from this section in the direction of the retaining bracket.

It is also conceivable that the duct plate extension is designed as a slide extension, with a substantially vertically displaceable sliding plate and a bearing part, the bearing part being attachable to the duct plate. The sliding plate is vertically displaceable relative to the bearing part and can be arranged accordingly in different positions analogous to the folded and unfolded positions. In the unfolded position, for example, the slide plate is lowered downward in the direction of the subgrade, while in the folded-out position it is displaced vertically up to its maximum height position relative to the bearing part.

In order to be able to adjust the sliding plate in a simple manner and, for example, attach it relative to the bearing part, the bearing part can have a sliding guide for a sliding rod connected to the sliding plate and / or guide slots for sliding projections protruding from the sliding plate. By means of the sliding guide, the sliding plate is vertically adjustable via the push rod and by means of the guide slots, the sliding plate is guided over the protruding sliding projections relative to the bearing part and, if necessary, can be fastened there.

In this context, it can also prove to be advantageous if the sliding plate has an adjustment projection with a threaded section, in which the sliding rod is in engagement with an externally threaded section for height adjustment. That is, by turning the push rod, the sliding plate is moved further up or down relative to the bearing part via the thread engagement.

In the simple exemplary embodiment, the sliding projections can be designed as sliding bolts and / or have a screw connection end section. Nuts, for example, can be screwed onto this screwing end section in order to fix certain positions of the sliding plate relative to the bearing part.

In order to also mount the push rod on the push plate, the push rod can be mounted in a longitudinally displaceable manner in a bore formed in an upper cover edge of the push plate. Through this hole there is a vertical guidance of the sliding plate relative to the push rod when it is rotated.

In the case of the sliding plate, too, and generally in the case of a duct plate extension, it can prove to be advantageous if this can be adjusted electrically or hydraulically, so that manual adjustment is not necessary. In the case of electrical or hydraulic adjustment, remote-controlled adjustment can also take place. It should also be noted that the duct plate extension can have a rubber wiper at its lower end or that a lower end section of the duct plate extension is designed as such a rubber wiper. This means that this rubber scraper can give way in the event of slight collisions with the ground or subgrade, thus preventing damage to the duct plate and, in particular, the possibility of adjusting the corresponding flap extension.

The invention also relates to a duct plate as described above.

In the following, advantageous exemplary embodiments of the invention are explained in more detail with reference to the figures enclosed in the drawing.

Fig. 1

eine perspektivische Vorderansicht eines Straßenfertigers mit seitlichen Schneckenförderern und Kanalblechen gemäß Erfindung;

Fig. 2

eine Ansicht analog zu Figur 1 mit ausgeklappten bzw. ausgeschobenen Klappenextensionen bei jedem Kanalblech;

Fig. 3

eine perspektivische Hinteransicht eines Kanalblechs gemäß einem ersten Ausführungsbeispiel mit Klappenextension in Einklappstellung;

Fig. 4

eine Ansicht analog zu Figur 3 mit Klappenextension in Ausklappstellung;

Fig. 5

ein zweites Ausführungsbeispiel für eine Klappenextension in Form einer Schieberextension, und

Fig. 6

eine Ansicht analog zu Figur 5 mit Schieberextension in Ausklappstellung.

Show it:

Fig. 1

a perspective front view of a road paver with lateral screw conveyors and channel plates according to the invention;

Fig. 2

a view analogous to Figure 1 with folded out or pushed out flap extensions on each duct sheet;

Fig. 3

a perspective rear view of a duct plate according to a first embodiment with flap extension in the folded-in position;

Fig. 4

a view analogous to Figure 3 with flap extension in unfolded position;

Fig. 5

a second embodiment for a flap extension in the form of a slide extension, and

Fig. 6

a view analogous to Figure 5 with slide extension in unfolded position.

Figure 1 shows a perspective view obliquely from the rear of a road paver 1 with two lateral screw conveyors 2 to increase a basic working width 3 by corresponding lateral working widths 4 and 5. Such a road paver 1 is essentially known, a number of channel plates 6 being assigned to the lateral screw conveyors 2 . These are arranged in front of the screw conveyors 2 in the direction of travel and are mounted on a corresponding traverse 7 or directly on the chassis 8 of the road finisher 1. The channel plates together with the screw conveyors or a corresponding screed form a so-called screw trough. This is intended to prevent mix from flowing out of the screw space under the channel plates in the direction of travel, where it cools down and worsens the paving result.

Corresponding duct plates 6 require a minimum distance from the ground or subgrade in order to avoid collisions with it. In addition, in the case of greater paving thicknesses, the distance both this and from the channel plates 6 to the subgrade 9 can be increased by a corresponding screw or chassis height adjustment.

In Figure 1 the corresponding channel plates 6 are arranged adjacent to an upper side of the subgrade 9 and are releasably fastened to the chassis 8 in the illustrated embodiment.

If the distance to the subgrade is increased by lifting the chassis 8, duct sheet extensions 10 according to the invention, see FIG Figure 2 , be pivoted or shifted downwards in the direction of the subgrade 9 in order to prevent the increased distance with regard to a flow of mix from the screw space under the channel plates in the direction of travel forward. In Figure 2 the corresponding duct extensions 10 at the lower ends of the duct plates 6 are extended into a corresponding unfolded position 20.

To Figure 2 the corresponding duct plate extensions 10 are designed as flap extensions 11, which are pivotably mounted on the lower ends 12 of the duct plates 6 by means of a corresponding pivot axis 13. The pivot axis 13 is between the lower end 12 and an upper end of the flap extension 11 Figure 2 arranged.

In the Figures 3 and 4th are corresponding flap extensions 11 on the channel plate 6 in their different positions Figures 1 and 2 shown in Figure 3 in folded position 19 and in Figure 4 in the unfolded position 20, which is also shown in Figure 2 is shown.

In Figure 4 In particular, the pivot axis 13 between the lower end 12 of the duct plate 6 and the flap extension 11 is visible. On a rear side of the flap extension 11 there is arranged an articulation flange 17 which is connected to an inclined articulation section 29 of a pivot rod 16 that runs obliquely forward and downward in the direction of the articulation flange. The corresponding articulated rod 16 is pivotably fixed on the articulation flange. A substantially vertical positioning section 30 adjoins the correspondingly inclined articulation section 29 of the articulated rod 16. This has a number of positioning openings 23, see Figures 3 and 4th which serve to fix the positioning section 30 on a retaining bracket 18 which protrudes from a rear side 15 of the duct plate 6. This retaining bracket 18 has two spaced-apart bracket parts 21 and 22, between which the positioning section 30 can be displaced. Depending on the position of the positioning section 30 relative to the retaining bracket 18, the cap extension 11 is adjusted accordingly between, for example, the folded-in position 19 Figure 3 or unfolded position 20 according to Figure 4 . Corresponding intermediate positions are also possible, see the corresponding arrangement of the positioning openings 23.

In the Figures 3 and 4th it should also be noted that the bracket parts 21 and 22 have at least two pairs of fixing openings 24 and 25 which are perpendicular to the rear side 15 of the channel plate 6 and spaced apart from one another. In Figure 3 becomes a first pair of fixing openings 24, see also Figure 4 , used for fixing the positioning section 30 by means of corresponding fixing means 26, while in Figure 4 another pair of fixing openings 25, see also Figure 3 , is used for this fixation. The corresponding fixing means 26 is, for example, an insertable bolt that can be fastened in its inserted position.

A handle 28 is attached to an upper end 27 of the articulated rod 16, by means of which different relative positions between the flap extension 11 and the duct plate 6 can be set by a user by raising or lowering the articulated rod 16, see also the number of corresponding positioning openings 23 for such different relative positions .

In the case of the flap extensions 11, it is also possible that they have a rubber scraper at their lower ends, i.e. at their free ends, which can evade in the event of slight collisions with the ground or planum and is intended to prevent damage to the hinge mechanism 14.

There is also the possibility that a lower end section of the flap extension 11 is designed as such a rubber scraper.

In the Figures 5 and 6th Another embodiment of a duct plate extension 10 in the form of a slide extension 31 is shown. The slide extension 31 comprises, for example, a slide plate 32 and a bearing part 33. The bearing part 33 can correspondingly be releasably attached to a rear side of a channel plate 6 so that the slide plate 32 moves into the corresponding positions relative to this bearing part 33 and thus to the channel plate 6 Figures 5 and 6th is displaceable, see folded position 19 after Figure 5 and unfolded position 20 according to Figure 6 . In the folded-in position 19, the sliding plate 32 is so far removed from the subgrade that it does not, for example, protrude downward over the duct plate 6, see the corresponding arrangement of the duct plates 6 Figure 1 without protruding the duct sheet extension 10.

Shows accordingly Figure 6 an arrangement of the sliding plate 32 according to the illustration Figure 2 , in which the duct plate extension 10 protrude downwards over the lower ends of the duct plate 6.

The bearing part 33 is essentially box-shaped and in Figures 5 and 6th open in the direction of the viewer. A passage 34 for the push rod is formed in an upper end. Approximately in the middle, the bearing part 33 has a longitudinal slot 46 through which an adjustment projection 38 is passed, which protrudes from a rear side of the slide plate 32. The arrangement of the adjustment projection 38 relative to the longitudinal slot 46 defines the minimum or maximum extension position of the sliding plate 32 relative to the bearing part 33, this being the folded position 19, see Figure 5 , or the unfolded position 20, see Figure 6 , correspond. On both sides adjacent to the longitudinal slot 46, guide slots 36 are formed, through which sliding projections 37 in the form of sliding bolts 41 are passed, which also protrude from a corresponding rear side of the sliding plate 32. These sliding bolts 41 have screwed end sections 42 with which corresponding nuts can be connected. These can also serve to correspondingly fix the relative positions between sliding plate 32 and bearing plate 33.

The actual adjustment of the slide plate 32 relative to the bearing part 33 takes place by rotating a slide rod 35. This is guided in a longitudinally displaceable manner in an upper cover edge 43 of the bearing part 33 in a bore 44. The push rod 35 extends essentially vertically and is arranged with a lower external thread section 40 in a thread section 39 which is arranged or formed on the adjustment projection 38. The threaded section 39 can be designed, for example, as a nut arranged in the adjustment projection 38 in a rotationally fixed manner. By rotating the push rod 35 there is a corresponding shifting of the Threaded section 39 along the external threaded section 40 and thus an adjustment of the adjustment projection 38, which is fastened to the slide plate 32.

To facilitate the corresponding rotation of the push rod 35, it has a handle 28 at its upper end.

The corresponding bearing part 33 can be releasably attached to a rear side of a duct plate 6, for example by means of lateral bores 47.

Also in the embodiment according to Figures 5 and 6th A rubber wiper can additionally be arranged at a lower end 45 of the slide plate 32 or a lower end section of the slide plate can be designed as a rubber wiper.

Finally, it should be noted that the adjustment of the corresponding duct plate extensions can also be done hydraulically or electrically in addition to manual. Corresponding adjustment mechanisms can be designed analogously to those already described, so that, for example, the pivoting of the flap extension 11 or the lifting and lowering of the sliding plate 32 takes place accordingly hydraulically or electrically. With such a hydraulic or electrical adjustment, this can also be done remotely and wirelessly. A corresponding adjustment is in the EP 17 206 966 for swiveling material deflectors. An actuator unit for movement, in particular for pivoting, is assigned to the material deflector, the actuator unit comprising an electrical, hydraulic, electrohydraulic or pneumatic actuator.

Claims (16)

1. Road finisher (1) with at least one limiting plate ,said limiting plate being detachably fastened, in driving direction in front of a screw conveyor (2), to the road finisher on a traverse (7) or on the chassis (8) of the road finisher in order to increase the basic working width (3), the limiting plate (6) being arranged at variable spacing from a subgrade (9), characterized in that a limiting plate extension (10) is arranged on the limiting plate so as to be adjustable in the direction of the subgrade (9).
2. Road finisher according to claim 1, characterised in that the limiting plate extension (10) is formed as a flap extension (11) pivotably mounted on the limiting plate (6).
3. Road finisher according to claim 2, characterised in that the flap extension (11) is pivotably mounted substantially at the lower end (12) of the limiting plate (6).
4. Road finisher according to claim 3, characterised in that a pivot axis (13) connects limiting plate (6) and flap extension (10).
5. Road finisher according to one of claims 2 to 4, characterised in that the flap extension (11) is connected via an adjustable joint mechanism (14) to a side of the limiting plate (6) directed away from the screw conveyor (2).
6. Road finisher according to claim 5, characterised in that the joint mechanism (14) has a hinge rod (16) and a hinged flange (17) projecting from the flap extension (11), on which hinged flange the hinge rod (16) is pivotably mounted.
7. Road finisher according to claim 6, characterised in that the hinge rod (16) is fixed to a retaining bracket (18) projecting from the rear side (15) of the limiting plate (6) in at least one fold-in and one fold-out position (19, 20).
8. Road finisher according to claim 7, characterised in that the retaining bracket (18) has two spaced-apart bracket parts (21, 22), between which the hinge rod (16) is arranged and/or the hinge rod (16) has a number of positioning openings (23) by means of which different relative positions of the hinge rod (16) and retaining bracket (18) are fixed.
9. Road finisher according to claim 7 or 8, characterised in that the retaining bracket (18) has at least two fixing opening pairs (24, 25) which are spaced apart from one another substantially perpendicularly to the rear side (15) of the limiting plate (6) and with which the positioning openings (23) are aligned in different relative positions and in which a fixing means (26) engages.
10. Road finisher according to one of the preceding claims, characterized in that the hinge rod (16) has at its upper end (27) a handle (28) and/or a lower joint section (29) inclined in the direction of the hinged flange (17) and a positioning section (30) extending substantially vertically from the latter in the direction of the retaining bracket (18).
11. Road finisher according to one of the preceding claims, characterised in that the limiting plate extension (10) is designed as a slide extension (31) with a substantially vertically displaceable sliding plate (32) and a bearing part (33), wherein the bearing part (33) can be attached to the limiting plate (6).
12. Road finisher according to claim 11, characterised in that the bearing part (33) has a sliding guide (34) for a sliding rod (35) connected to the sliding plate (32) and/or guide slots (36) for sliding projections (37) projecting from the sliding plate (32).
13. Road finisher according to claim 12, characterised in that the sliding plate (32) has an adjusting projection (38) with a threaded section (39), in which the sliding rod (35) is engaged with an externally threaded section (40) for height adjustment.
14. Road finisher according to claim 12 or 13, characterised in that the displacement projections (37) are constructed as displacement bolts (41) and/or have a screw connection end section (42).
15. Road finisher according to one of claims 12 to 14, characterised in that the sliding rod (35) is mounted longitudinally displaceably in a bore (44) formed in an upper cover edge (43) of the sliding plate (32).
16. Road finisher according to one of claims 12 to 14, characterised in that the limiting plate extension (10) is electrically, hydraulically, electrohydraulically and/or pneumatically adjustable and/or has a rubber wiper at its lower end (45) or a lower end section of the limiting plate extension (10) is designed as a rubber wiper.

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