ROAD FINISHING MACHINE WITH SUCTION DEVICE

Abstract

A road finishing machine comprises a screed for producing a paving layer from a paving material, a material bunker for receiving the paving material, a longitudinal conveying device configured to transport the paving material from the material bunker toward the screed, and a transverse distributor auger configured to distribute the paving material transported by the longitudinal conveying device transversely in front of the screed. The transverse distributor auger is mounted in front of a screed basic body of the screed within a transverse distributor channel, which is formed at least in sections by channel plates supported at a chassis of the road finishing machine, and by pre-scrapers attached laterally of a screed basic body of the screed. The road finishing machine further includes at least one suction device with at least one intake line which is configured to suck off aerosols forming during the transverse distribution of the paving material.

Claims

1. A road finishing machine comprising: a screed for producing a paving layer from a paving material; a material bunker for receiving the paving material; a longitudinal conveying device which is configured to transport the paving material from the material bunker against a direction of travel of the road finishing machine toward the screed; a transverse distributor auger which is configured to distribute the paving material transported toward the screed by the longitudinal conveying device transversely to the direction of travel in front of the screed, wherein the transverse distributor auger is mounted, in the direction of travel, in front of a screed basic body of the screed within a transverse distributor channel arranged for transverse distribution of the paving material in front of the screed, wherein the transverse distributor channel is formed transversely to the direction of travel in front of the screed at least in sections by channel plates supported at a chassis of the road finishing machine, and by pre-scrapers attached laterally of the screed basic body of the screed; and at least one suction device with at least one intake line which is configured to suck off aerosols formed during the transverse distribution of the paving material from regions along the transverse distributor channel, wherein the at least one intake line is arranged at least in sections at the channel plates, at least in sections at the pre-scrapers, at least in sections at a front side of the screed basic body facing the transverse distributor auger, and/or at least in sections at an external control platform of the screed.

2. The road finishing machine according to claim 1, wherein the at least one intake line comprises a pipeline extending transversely to the direction of travel, and/or the at least one intake line comprises a rectangular pipe.

3. The road finishing machine according to claim 1, wherein the at least one intake line includes a wall which is formed, at least in sections, as an integral part of the channel plates, the pre-scrapers, the front side of the screed basic body, and/or a component of the external control platform.

4. The road finishing machine according to claim 1, wherein the at least one intake line is formed, at least in sections, along an upper edge of the channel plates, along an upper edge of the pre-scrapers, and/or along an upper edge of a side pusher support of the external control platform.

5. The road finishing machine according to claim 1, wherein the at least one intake line formed at the front side of the screed basic body, at the channel plates, at the pre-scrapers, and/or at the external control platform is dimensioned such that the transverse distributor channel is essentially uncovered, seen from above.

6. The road finishing machine according to claim 1, wherein the at least one intake line forms an exhaust air guide oriented transversely to the direction of travel along the transverse distributor channel.

7. The road finishing machine according to claim 1, wherein the at least one intake line includes a plurality of interconnectable line sections whose coupling ends are formed in a region of separating points of channel plates attached one next to the other, and/or of pre-scrapers.

8. The road finishing machine according to claim 7, wherein adjacent channel plates and/or pre-scrapers are assembled by the coupling ends of the at least one intake line.

9. The road finishing machine according to claim 1, wherein the at least one intake line includes a plurality of passages as intake openings.

10. The road finishing machine according to claim 9, wherein the at least one intake line includes at least one closing mechanism for opening and closing at least one of the intake openings, and/or the intake openings are formed at different side walls of the at least one intake line.

11. The road finishing machine according to claim 1, wherein the at least one suction device includes at least one fan connected with the at least one intake line, the at least one fan being arranged in a region of the external control platform of the screed at a side pusher formed thereat for setting a working width.

12. The road finishing machine according to claim 1, wherein the at least one suction device includes, at an outlet side, at least one exhaust air line for ejecting the aerosols sucked off from the transverse distributor channel, and wherein the at least one exhaust air line is attached to a roof structure of the external control platform of the screed.

13. The road finishing machine according to claim 1, wherein the at least one suction device includes at least one activated-carbon filter unit.

14. The road finishing machine according to claim 1, wherein the at least one intake line comprises an intake line at a channel plate of the channel plates which is positioned closest to the chassis of the road finishing machine, and the intake line is configured for coupling with a vent line provided at the chassis of the road finishing machine.

15. The road finishing machine according to claim 1, wherein the at least one suction device includes at least one spray device for spraying a fluid into the transverse distributor channel, wherein the at least one spray device comprises at least one nozzle which is attached to the at least one intake line.

16. A road finishing machine comprising: a screed for producing a paving layer from a paving material; a material bunker for receiving the paving material; a longitudinal conveying device configured to transport the paving material from the material bunker against a direction of travel of the road finishing machine toward the screed; a transverse distributor auger configured to distribute the paving material transported toward the screed by the longitudinal conveying device transversely to the direction of travel in front of the screed, wherein the transverse distributor auger is mounted in front of a screed basic body of the screed, with respect to the direction of travel; a channel plate supported at a chassis of the road finishing machine in front of the transverse distributor auger, with respect to the direction of travel; a pre-scraper attached laterally of the screed basic body of the screed; and at least one suction device with at least one intake line configured to suck off aerosols formed during transverse distribution of the paving material, wherein the at least one intake line is arranged, at least in a section, at the channel plate, at the pre-scraper, at a front side of the screed basic body facing the transverse distributor auger, and/or at an external control platform of the screed.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The disclosure will be illustrated more in detail with reference to exemplified embodiments according to the following figures. In the drawing:

[0039] FIG. 1 shows a road finishing machine for producing a paving layer;

[0040] FIG. 2 shows a perspective representation of the road finishing machine with a screed which is provided as an extendable screed;

[0041] FIG. 3 shows a schematic plan view of an extendable screed for a road finishing machine;

[0042] FIG. 4 shows the extendable screed of FIG. 3 with laterally extended pull-out parts;

[0043] FIG. 5 shows a screed with extended pull-out parts and attachments laterally attached thereat for producing a desired working width;

[0044] FIG. 6 shows an external control platform of a screed in a schematic representation; and

[0045] FIG. 7 shows schematically represented positioning variants of the intake line at its support component.

[0046] Equal components are always provided with equal reference numerals in the figures.

DETAILED DESCRIPTION

[0047] FIG. 1 shows a road finishing machine 1 for producing a paving layer 2 on a subsoil 3. The road finishing machine 1 includes, in the direction of travel R in the front, a material bunker 4 from which a paving material 6 received therein is transported, against the direction of travel R of the road finishing machine 1, to a screed 7 of the road finishing machine 1 by means of a longitudinal conveying device 5. The longitudinal conveying device 5 is arranged within a chassis 8 of the road finishing machine 1 and includes a scraper belt 9 that is shown in FIG. 3.

[0048] From the scraper belt 9 of the longitudinal conveying device 5, the paving material 6 is transferred to a transverse distributor auger 10 positioned in front of the screed 7. The transverse distributor auger 10 is configured to distribute the paving material 6 in front of the screed 7.

[0049] FIG. 2 shows the road finishing machine 1 in a perspective representation. The screed 7 includes a screed basic body 11 and pull-out parts 12 extendable to the side to set a desired working width B of the produced paving layer 2. The left pull-out part 12 shown in FIG. 2 has a side pusher 13 for setting the working width B of the newly installed paving layer 2. At the side pusher 13, an external control platform 14 is arranged which includes a control device 15 for a screed operator. The side pusher 13 includes a side pusher support 40 which can be employed for the construction of the external control platform 14. At the external control platform 14, the screed operator can control and/or monitor the operation of the screed 7. It is in particular convenient that the screed operator can monitor a transverse distribution of the paving material 6 in front of the screed 7, i.e., also in front of the pull-out parts 12.

[0050] FIG. 3 shows a plan view of the screed 7 of the road finishing machine 1 in a schematic representation. The paving material 6 discharged by means of the scraper belt 9 in front of the screed basic body 11 of the screed 7 is distributed along a front side 16 of the screed basic body 11 by means of the transverse distributor auger 10. A rear wall 22 of the chassis 8 of the road finishing machine 1 forms, together with the front side 16 of the screed basic body 11, a transverse distributor channel 17 for the transverse distributor auger 10. This transverse distributor channel 17 can be further expanded to the side corresponding to a broadening of the screed 7. This is shown in FIGS. 4 and 5.

[0051] FIG. 3 furthermore shows that an intake line 18a is formed at the front side 16 of the screed basic body 11. The intake line 18a includes a plurality of intake openings 19 which are configured to suck off aerosols formed during the paving operation within the transverse distributor channel 17.

[0052] The intake line 18a is configured in the form of a suction rail directly at the screed basic body 11 in FIG. 3. It is thus present in a particularly compact design and permits an unrestricted view of the screed operator into the transverse distributor channel 17.

[0053] The intake line 18a can be configured as a suction end of a suction device 20 which is installed at the chassis 8 of the road finishing machine 1. The intake line 18a could be, for example, connected to a fan 23 via an exhaust air guide 21. The exhaust air guide 21 could also have a different extension, it could extend, for example, over a central auger suspension 24 to the fan 23.

[0054] Finally, FIG. 3 schematically shows a spray device 37 with a nozzle 38 to misten the aerosol formation within the transverse distributor channel 17. The spray device 37 can be configured to produce water vapor.

[0055] FIG. 4 shows the screed 7 in a schematic plan view representation with extended pull-out parts 12. With such a broadening of the screed 7, a larger working width B for the newly produced paving layer 2 can be produced. FIG. 4 shows that the transverse distributor channel 17 is extended sidewards beyond the screed basic body 11. Along the broadened transverse distributor channel 17, the paving material 6 discharged by the scraper belt 9 can be transported to the outer sides of the pull-out parts 12. The transverse distributor auger 10 arranged within the transverse distributor channel 17 in FIG. 4 is also extended.

[0056] The transverse distributor channel 17 arranged in front of the screed 7 is formed at its outer regions transversely to the direction of travel R by means of channel plates 25 supported at the chassis 8 of the road finishing machine 1, and by means of pre-scrapers 26 attached laterally of the screed basic body 11. Depending on the set working width B, the channel plates 25 and the pre-scrapers 26 can be further extended to the side to extend the transverse distributor channel 17. The same analogously applies to the transverse distributor auger 10.

[0057] FIG. 4 moreover shows that the intake line 18a formed at the front side 16 of the screed basic body 11 is extended by further intake lines 18b, 18c to suck off aerosols from the transverse distributor channel 17. The intake lines 18a, 18b, 18c are thereby, according to FIG. 4, formed along the transverse distributor channel 17 at a side 27 of the channel plates 25 facing the transverse distributor auger 10, at a side 28 of the pre-scrapers 26 facing the transverse distributor auger 10, and at the front side 16 of the screed basic body 11.

[0058] As an integral part at the channel plates 25 and the pre-scrapers 26, in particular the intake lines 18b, 18c permit the screed operator a view into the transverse distributor channel 17 without any obstructions.

[0059] FIG. 5 shows the screed 7 with extended pull-out parts 12 and attachments 29 laterally fixed thereto for producing a very large working width B for the paving layer 2. FIG. 5 shows that the transverse distributor channel 17 is formed along the screed basic body 11, the pull-out parts 12, and along the attachments 29 fixed thereto transversely to the direction of travel R. Corresponding to the working width B, further channel plates 25 and pre-scrapers 26 were mounted to further extend the transverse distributor channel 17.

[0060] FIG. 5 furthermore shows that the intake lines 18b, 18c formed at the channel plates 25 and the pre-scrapers 26 are extended to be able to suck off aerosols along the complete extension of the transverse distributor channel 17. At separating points 30a of the channel plates 25 and at separating points 30b of the pre-scrapers 26, coupling ends 31 of the intake lines 18b, 18c are connected to each other.

[0061] FIGS. 3 to 5 show an intake line 18d which is arranged at the side pusher 13 of the external control platform 14. The intake line 18d can be configured as part of a suction device separately provided for the external control platform 14.

[0062] FIG. 6 shows, in a schematic representation, the external control platform 14 of FIG. 2 with a roof structure 32 for a screed operator P. The external control platform 14 shows that the screed operator P is standing on a gangway 33 which extends behind the screed 7 over the paving layer 2. The gangway 33 is also shown in FIG. 1. A fan 34 is provided at the side pusher 13. The fan 34 can be connected with the intake lines 18b, 18c, 18d to suck off aerosols from the transverse distributor channel 17. FIG. 6 furthermore shows that an exhaust air line 35, which is schematically represented in FIG. 6 as a dashed line, ejects the sucked-off aerosols above the roof structure 32 from the fan 34. FIG. 6 furthermore shows an activated-carbon filter unit 36 for purifying the aerosols sucked off from the transverse distributor channel 17.

[0063] The intake lines 18a, 18b, 18c, 18d directly and integrally installed at the side pusher 13 of the external control platform 14, at the screed basic body 11, the channel plates 25, and/or the pre-scrapers 26 form an advantageous inlet geometry for the suction device 20 at the road finishing machine 1. In particular its compact construction reduced as to the existing structures permit the screed operator to have a perfect view into the transverse distributor channel 17 independent of how far it is extended in front of the screed 7. The integral design of the intake lines 18a, 18b, 18c, 18d overall offers reduced manufacturing and assembly efforts at the road finishing machine 1.

[0064] FIG. 7 schematically shows that the intake lines 18a, 18b, 18c, 18d can be formed, in the assembled state according to the left representation, either in the foreground, that means as a visible attachment at the respective support components (i.e., at the channel plates, the pre-scrapers, at the screed basic body 11, and/or at the side pusher support 40), or can be formed, according to the right representation of FIG. 7, to be integrated in the construction of the support components.

[0065] The intake lines 18a, 18b, 18c, 18d are arranged in FIG. 7 at a level of an upper edge 42 of the channel plates 25 and pre-scrapers 26. The intake lines 18a, 18b, 18c, 18d thus together form a frame essentially surrounding the transverse distributor channel 17 to suck off the aerosols formed in the transverse distributor channel 17. The arrows pointing in the direction of the intake lines 18a, 18b, 18c, 18d in FIG. 7 indicate at which sides the sucking-off of the aerosols is possible.