U.S. patent application number 11/838302 was filed with the patent office on 2008-03-13 for method of forming a multi-course paver for paving multi-course road surfaces, and multi-course paver.
Invention is credited to Hermann Schade, Ronald Utterodt.
Application Number | 20080063475 11/838302 |
Document ID | / |
Family ID | 38777672 |
Filed Date | 2008-03-13 |
United States Patent
Application |
20080063475 |
Kind Code |
A1 |
Utterodt; Ronald ; et
al. |
March 13, 2008 |
METHOD OF FORMING A MULTI-COURSE PAVER FOR PAVING MULTI-COURSE ROAD
SURFACES, AND MULTI-COURSE PAVER
Abstract
A method to form a multi-course paver from two independent
pavers, namely a lower base paver (10) and an upper paver (11)
saddled thereon using the piggyback principle. Both the base paver
(10) and the upper paver (11) can be used as stand-alone pavers for
producing single-layer road surfaces. Therefore, the invention does
not require any costly add-on devices, which can be used only for
multi-course paving, for paving the second course of the road
surface.
Inventors: |
Utterodt; Ronald; (Lutten,
DE) ; Schade; Hermann; (Lingen, DE) |
Correspondence
Address: |
SMITH, GAMBRELL & RUSSELL
SUITE 3100, PROMENADE II, 1230 PEACHTREE STREET, N.E.
ATLANTA
GA
30309-3592
US
|
Family ID: |
38777672 |
Appl. No.: |
11/838302 |
Filed: |
August 14, 2007 |
Current U.S.
Class: |
404/82 ; 404/110;
404/72 |
Current CPC
Class: |
E01C 19/48 20130101 |
Class at
Publication: |
404/82 ; 404/110;
404/72 |
International
Class: |
E01C 19/48 20060101
E01C019/48 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 8, 2006 |
DE |
102006042846.3 |
Oct 6, 2006 |
DE |
102006047332.9 |
Claims
1. Method of forming a multi-course paver for paving multi-course
road surfaces, wherein a base paver (10) for forming a road surface
is provided, by way of conversion, with devices for forming a
second road surface, comprising, for conversion purposes, arranging
an upper paver (11) above the base paver (10).
2. Method according to claim 1, wherein the upper paver (11) is
arranged above the base paver (10) such that the upper paver (11)
and travelling gear of the upper paver (11) are situated at a
distance above a ground surface.
3. Method according to claim 1, wherein the entire multi-course
paver is driven by travelling gear (13) of the base paver (10).
4. Method according to claim 1, wherein the upper paver (11) is
saddled on the base paver (10).
5. Method according to claim 1, wherein the upper paver (11) is
arranged without travelling gear above the base paver (10).
6. Method according to claim 1, wherein the upper paver (11) is
arranged without a paving screed (19) and/or a distributing auger
(18) on the base paver (10).
7. Method according to claim 1, wherein the upper paver (11) is
placed on the base paver (10) without contact with the ground.
8. Method according to claim 1, wherein the base paver (10) is
assigned a carrier device for the upper paver (11), which carries
the upper paver (11).
9. Method according to claim 8, wherein the carrier device for the
upper paver (11) is assigned to the base paver (10) in a releasable
manner.
10. Method according to claim 8, wherein at least a paving screed
(19), which is removed from the upper paver (11), is suspended on
the carrier device.
11. Method according to claim 1, wherein a base course or binder
course is paved by the base paver (10) and a wearing course is
paved by the upper paver (11).
12. Multi-course paver for paving a multi-course road surface,
comprising a base paver (10) and a device for producing a second
course of the road surface, wherein an upper paver (11) is arranged
above the base paver (10) to form the device for producing the
second course of the road surface.
13. Multi-course paver according to claim 12, wherein the upper
paver (11) is placed on the base paver (10).
14. Multi-course paver according to claim 12, wherein at least one
paving screed (19) of the upper paver (11), separated therefrom, is
suspended on the base paver (10).
15. Multi-course paver according to claim 12, wherein a carrier
device is arranged between the base paver (10) and the upper paver
(11) arranged above the base paver.
16. Multi-course paver according to claim 15, wherein the carrier
device is coupled to the base paver (10) such that the upper paver
(11), without an active travel drive of its own, can be moved with
the carrier device by the base paver (10).
17. Multi-course paver according to claim 15, wherein the carrier
device is supported at least in part on a different ground
surface.
18. Multi-course paver according to claim 17, wherein the carrier
device is supported on the ground by at least one wheel (21,
22).
19. Multi-course paver according to claim 18, wherein at least one
wheel (22) of the carrier device is height-adjustable.
20. Multi-course paver according to claim 15, wherein the carrier
device is supported on the base paver (10) via at least one push
point (24) for transmitting a horizontal force or movement of the
base paver.
21. Multi-course paver according to claim 15, wherein the carrier
device is assigned at least one storage container (31) for one type
of road-building material.
22. Multi-course paver according to claim 15, wherein the carrier
device is assigned a conveyor for filling a storage container (34)
of the upper paver (11).
23. Multi-course paver according to claim 15, wherein the carrier
device is assigned at least one means for transferring
road-building material from the upper paver (11) to a rear
distributing auger (18).
24. Multi-course paver according to claim 15, wherein the carrier
device is assigned at least a paving screed (19) of the upper paver
(11).
25. Multi-course paver according to claim 24, wherein the paving
screed (19) of the upper paver (11) is suspended on the carrier
device.
26. Multi-course paver according to claim 15, wherein a paving
screed (19) and a distributing auger (18) of the upper paver (11)
are suspended on the carrier device.
27. Multi-course paver according to claim 15, wherein the carrier
device is designed as a three-dimensional carrier frame (20).
28. Method according to claim 9, wherein at least a paving screed
(19), which is removed from the upper paver (11), is suspended on
the carrier device.
29. Multi-course paver according to claim 13, wherein at least one
paving screed (19) of the upper paver (11), separated therefrom, is
suspended on the base paver (10).
30. Multi-course paver according to claim 16, characterized in that
the carrier device is supported at least in part on a different
ground surface.
31. Multi-course paver according to claim 30, characterized in that
the carrier device is supported on the ground by at least one wheel
(21, 22).
32. Multi-course paver according to claim 31, characterized in that
at least one wheel (22) of the carrier device is height-adjustable.
Description
STATEMENT OF RELATED APPLICATIONS
[0001] This patent application is based on and claims convention
priority on German Patent Application No. 10 2006 042 846.3 having
a filing date of 8 Sep. 2006 and German Patent Application No. 10
2006 047 332.9 having a filing date of 6 Oct. 2006, both of which
are incorporated herein by this reference in their entireties.
BACKGROUND OF THE INVENTION
[0002] 1. Technical Field
[0003] The invention relates to a method of forming a multi-course
paver for paving multi-course road surfaces, wherein a base paver
for forming a road surface is provided, by way of conversion, with
devices for forming a second road surface. Furthermore, the
invention relates to a multi-course paver for paving a multi-course
road surface, comprising a base paver and a device for producing a
second course of the road surface.
[0004] 2. Related Art
[0005] Road surfaces are conventionally formed from essentially
three courses, namely a base course, a binder course and a wearing
course. It has been found that a high-quality road surface can be
obtained if the uppermost surface courses are paved in direct
succession, so that the hot wearing course is applied to the
still-hot binder course. The technical jargon term used in this
connection is "hot-on-hot" laying.
[0006] Special multi-course pavers are known for "hot-on-hot"
laying. For instance, EP 1 058 752 B1 discloses a multi-course
paver which is formed from a conventional paver for forming a
single-course road surface and from an add-on device. This add-on
device is designed to produce the second road surface, that is to
say the wearing course. The add-on device is arranged on a
framework which is to be connected releasably to the paver, and
this framework can be pushed laterally onto the travelling gear of
the paver and fastened thereto by means of fastening points. The
add-on device can be used only together with the paver which
carries it for simultaneously paving two courses of the road
surface. If the paver is to be used for paving a single-course road
surface, the add-on device must be removed. It cannot be used for
other purposes.
BRIEF SUMMARY OF THE INVENTION
[0007] Taking the foregoing as a starting point, the object on
which the invention is based is to provide a method for forming a
multi-course paver and also to provide a multi-course paver, with
use being made of stand-alone pavers which can also be used for the
production of conventional single-course road surfaces.
[0008] A method for achieving this object comprises a method of
forming a multi-course paver for paving multi-course road surfaces,
wherein a base paver for forming a road surface is provided, by way
of conversion, with devices for forming a second road surface,
characterized in that, for conversion purposes, an upper paver is
arranged above the lower base paver. Accordingly, provision is made
to arrange an upper paver above a lower base paver. Thus, for
multi-course paving, use is made of two stand-alone pavers arranged
one above the other on the piggyback principle. The base paver here
serves as a carrier unit for the upper paver. If required, both the
base paver and the upper paver can be used separately from one
another to produce conventional single-course road surfaces.
[0009] It is possible, for the purpose of converting into a
multi-course paver, to arrange the entire upper paver above the
base paver. The upper paver here is situated at a distance above
the ground, with the result that its travelling gear is not
supported on the ground, and consequently only the travelling gear
of the base paver serves as travelling gear for the entire
multi-course paver. The travelling gear of the upper paver thus
hangs in the air as it were, and so all the pavers together are
carried by the travelling gear of the lower base paver. However,
provision is preferably made to arrange the upper paver without its
travelling gear on the lower base paver. For this purpose, the
travelling gear is uncoupled from the upper paver before the said
paver is placed on the lower base paver. This reduces the weight of
the entire multi-course paver. The travelling gear of the base
paver then need only carry the upper paver without its travelling
gear. As an alternative, or additionally, the paving or compacting
screed and/or distributing auger are removed from the upper paver
before the upper paver is placed on the lower base paver.
[0010] Provision may be made to place the upper paver on the base
paver so that the base paver, in particular its travelling gear,
carries the upper paver. The travelling gear of the upper paver
here does not serve to advance the multi-course paver, this task
being performed solely by the travelling gear of the base
paver.
[0011] According to a preferred development of the method,
provision is made, however, to assign a carrier device for the
upper paver to the base paver, preferably in a releasable manner.
The carrier device can perform a number of jobs. It preferably
serves to provide simple coupling between the upper paver and the
lower base paver. However, as an alternative, or additionally, the
carrier device also serves to suspend the paving screed and/or
distributing auger removed from the upper paver.
[0012] The carrier device can be completely supported on the base
paver such that this base paver carries both the carrier device and
the upper paver. However, it is also conceivable for the carrier
device to be supported wholly or at least in part on the ground. In
that case at least part of the carrier device and the upper paver
arranged thereon rest on the ground. The carrier device then
assumes, at least in part, the function of the travelling gear of
the upper paver, which can consequently be removed therefrom or is
unloaded if, for multi-course paving, the upper paver is arranged
above or on the lower base paver.
[0013] A multi-course paver for achieving the aforementioned object
is a multi-course paver for paving a multi-course road surface,
comprising a base paver and a device for producing a second course
of the road surface, characterized in that an upper paver is
arranged above the base paver to form the device for producing the
second road surface. Provision is made here to arrange above the
base paver an upper paver which serves to form the second road
surface on the lower, first road surface produced by the base
paver. Accordingly, according to the invention, two stand-alone
pavers are arranged one above the other on the piggyback principle.
Here, the lower base paver carries the upper paver, the travelling
gear of which thus remains unused and unloaded and may, if
appropriate, also be disassembled prior to placing the said upper
paver on the lower base paver.
[0014] A multi-course paver is conceivable in which the upper paver
is placed directly on the lower paver, for which purpose coupling
means on the base paver and/or on the upper paver provide the
connection between the two pavers and carry the upper paver, which
hangs in the air as it were, on the base paver.
[0015] However, provision is preferably made to arrange at least
one carrier device between the base paver and the upper paver. The
carrier device comprises one or more means to retain the upper
paver above the lower base paver. The carrier device can be
supported completely on the base paver; however, it can also be
supported wholly or in part on the ground by way of its own
travelling gear, preferably a number of tyres, together with the
travelling gear of the base paver. In this case, the carrier device
need only be suspended on the lower base paver, with the result
that essentially only the pushing or pulling force of the
travelling gear of the base paver is transmitted to the carrier
device, that is to say that the base paver only pulls or pushes the
carrier device with the upper paver arranged thereon. In that case
the travelling gear of the carrier device does not need to have its
own drive, although, in an alternative embodiment of the invention,
it would also be conceivable for the travelling gear of the carrier
device to have its own drive.
[0016] The carrier device needs to have travelling gear preferably
consisting of one or more wheels at one end only, while the other
end of the carrier device rests on the base paver. The carrier
device with the upper paver is then, as it were, saddled on the
base paver. It is also conceivable for the carrier device with the
upper paver to be supported, at least in part, on the paving screed
for the upper paver, this paving screed being suspended on the
carrier device, or on both paving screeds for the upper paver and
the base paver. However, the carrier device with the upper paver
assigned thereto can also be supported wholly on its own travelling
gear, which is preferably also undriven in that case.
[0017] Furthermore, provision is made to design the travelling gear
of the carrier device such that it is height-adjustable. This makes
it possible to modify the weight loading on the base paver by the
carrier device, and especially by the upper paver arranged thereon,
to suit the requirements, even as the road surfaces are being
paved. The height-adjustability of the travelling gear of the
carrier device can also serve, during the paving operation, to
modify the force of weight exerted by the at least one paving
screed on the freshly paved road surface, in other words to adapt
it to the requirements.
[0018] The carrier device can be provided with at least one storage
container for one type of road-building material. This storage
container can serve as an additional storage container for the
storage container of the base paver, but also replace the storage
container of the upper paver or of the base paver. As an
alternative it is conceivable for the carrier device to be assigned
a conveyor for filling a storage container of the upper paver. In
that case the carrier device does not need to have a storage
container.
[0019] In a preferred development of the multi-course paver, at
least one means is assigned for transferring road-building material
from the upper paver to the distributing auger for the
road-building material of the surface course, in particular wearing
course, to be produced by the upper paver. The means assigned to
the carrier device thus bridges the increased distance between the
paver and the distributing auger assigned thereto that results from
the arrangement of the paver above the base paver.
[0020] The carrier device is preferably also assigned a compacting
screed or paving screed of the upper paver. The carrier device
hence carries those components of the upper paver which, owing to
its arrangement on the base paver, can no longer be arranged on the
paver and which, for the purpose of converting the two stand-alone
pavers into the multi-course paver, have been removed from the
upper paver for multi-course paving.
[0021] Finally, provision is made to design the carrier device as a
preferably three-dimensional carrier frame. This carrier frame can
engage both above and around the base paver and thus accommodate
the upper paver, if appropriate together with the travelling gear
and/or storage container remaining thereon, which means that only
the paving screed and, if appropriate, the distributing auger have
to be changed over from the upper paver to the carrier frame to
achieve a piggyback arrangement of the upper paver on the base
paver.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] A preferred exemplary embodiment of the invention will be
explained in more detail below with reference to the drawing, in
which:
[0023] FIG. 1 shows a simplified side view of the multi-course
paver according to the invention.
[0024] FIG. 2 shows a side view of a base paver for forming the
multi-course paver shown in FIG. 1.
[0025] FIG. 3 shows a side view of an upper paver for forming the
multi-course paver shown in FIG. 1.
[0026] FIG. 4 shows a side view of a carrier device of the
multi-course paver shown in FIG. 1.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0027] FIG. 1 shows a multi-course paver for simultaneously
producing two courses of a multi-course road surface. The
multi-course paver can preferably be used to produce a binder
course and a wearing course situated above it simultaneously, that
is to say in direct succession, thus making it possible for two
courses, especially the binder course and wearing course, to be
paved "hot-on-hot".
[0028] The multi-course paver shown in FIG. 1 comprises two fully
proficient standard commercial pavers which can each be used
individually for producing a single-course road surface. To this
end, an upper stand-alone paver 11 is arranged above a lower base
paver 10. In the exemplary embodiment shown, the upper paver 11 is
smaller than the lower base paver 10, because the wearing course is
usually thinner and therefore the mass of material is less than for
the lower course. However, if required, the upper paver 11 may be
exactly the same size as the base paver 10, thus having the same
paving performance
[0029] The upper paver 11 is arranged on the piggyback principle
above the base paver 10, which hence serves as a carrier unit,
specifically for the upper paver 11. In the exemplary embodiment
shown, the travelling gear has been removed from the paver 11 for
weight reduction purposes. The said paver is thus arranged without
its travelling gear above the base paver 10 in the exemplary
embodiment of FIG. 1. The travelling gear of the paver 11 is not
required in order to form the multi-course paver, because according
to the invention the upper paver 11 is arranged above the base
paver 10 in a raised position in which the travelling gear is in
any case situated at a distance from the ground 12, that is to say
is not supported on the ground 12.
[0030] According to an exemplary embodiment which is not shown, it
is possible for the upper paver 11 to be arranged together with its
travelling gear above the base paver 10. In that case, too, the
travelling gear of the paver 11 is located at a distance above the
ground 12, with the result that the travelling gear hangs "in the
air" and does not carry the upper paver 11 and is consequently
inactive during the multi-course paving operation, which also means
that it does not need to be driven. The piggyback arrangement
according to the invention of the upper paver 11 above the base
paver 10 has the advantage that the multi-course paver is driven
only by the travelling gear 13 of the base paver 10, thereby
avoiding any synchronization of the drives of the base paver 10 and
the upper paver 11--even if the travelling gear of the said upper
paver were used to support it on the ground 12.
[0031] The base paver 10 shown comprises travelling gear 13 which
is designed as crawler-type travelling gear. However, the invention
is not limited thereto. The base paver 10 of the multi-course paver
can also have different travelling gear, for example wheel-type
travelling gear.
[0032] The base paver 10 contains all the equipment it needs for
paving one of the bottom courses of the road surface to be
produced, that is to say a front storage container 15 as seen in
the paving direction 14, at least one distributing auger 16 behind
the travelling gear 13, and a paving screed 17 behind the
distributing auger 16. The paving screed 17 is preferably a
high-compaction screed. Accordingly, no alterations are required on
the base paver 10 to convert it to the multi-course paver.
[0033] From the upper paver 11, which according to the invention is
placed on the base paver 10 serving as carrier, have been removed
the travelling gear, the distributing auger 18 and the paving
screed 19 in the exemplary embodiment shown. However, if required,
the travelling gear may remain on the paver 11.
[0034] In addition to the base paver 10 and the paver 11, the
multi-course paver shown in FIG. 1 comprises a carrier device, here
designed as a carrier frame 20. The three-dimensional carrier frame
20 spans the base paver 10. In the exemplary embodiment of FIG. 1,
the carrier frame 20 is completely supported on the ground by front
wheels 21 and rear wheels 22. The front wheels 21 are situated in
front of the travelling gear 13 of the base paver 10 as seen in the
paving direction 14, while the rear wheels 22 are situated
alongside the rear region of the travelling gear 13. The wheels 21
and 22 are not provided with a drive and so are able to rotate
freely. In addition, in the exemplary embodiment shown, the carrier
frame 20 is connected to the base paver 10 via at least one
coupling point 23. In the case of the carrier frame 20 shown,
having front wheels 21 and rear wheels 22, this coupling point 23
may be dispensed with, if appropriate. When the coupling point 23
is present, it is also conceivable to dispense with the rear wheels
22, so that the carrier frame 20 is supported on the ground 12 by
the front wheels 21 only. Furthermore, the carrier frame 20 is
coupled to the base paver 10 via a push point 24. The push point 24
is formed in such a way that it only transmits horizontal forces
between the carrier frame 20 and the base paver 10, but not
vertical forces. As a result, the push point 24 serves only to
allow the carrier frame 20, which does not have a drive of its own,
together with the paver 11 arranged thereon, to be moved forward,
in particular pushed on ahead, by the base paver 10 in the paving
direction 14.
[0035] When the coupling point 23 is present, the push point 24 may
be dispensed with, if appropriate. Provision is also made to
relieve the load on the base paver 10, in particular the paving
screed 17 suspended thereon, during the paving of the road surfaces
by adjusting the height of at least the rear wheels 22 and/or the
coupling point 23. For this purpose, a height adjustment of the
rear wheels 22 and/or the coupling point 23 is brought about by
means of suitable mechanically, electrically, hydraulically or
pneumatically operated lifting means.
[0036] The upper paver 11 is placed on the carrier frame 20. This
means that, with the aid of the carrier frame 20, the upper paver
11 is saddled on the lower base paver 10. The lower base paver 10
here serves as a carrier unit and at the same time also serves to
drive the carrier frame 20 together with the paver 11 arranged
thereon. The upper paver 11 is connected releasably to the carrier
frame 20, specifically at suitable points. The upper paver 11 is
preferably connected to approximately horizontally extending upper
bearers 25 of the carrier frame 20, for example by screwing. To
obtain exact positioning of the upper paver 11 on the carrier frame
20, stops or positioning means may be provided on the upper paver
11 and/or carrier frame 20.
[0037] The distributing auger 18 and the paving screed 19 for the
upper paver 11 are also carried by the carrier frame 20. The
distributing auger 18 of the paver 11 and, behind it, the paving
screed 19 of the upper paver 11 are fastened to the carrier frame
20 behind the paving screed 17 of the base paver 10. At least the
paving screed 19 is arranged height-adjustably at the rear end of
the carrier frame 20. As an alternative, the paving screed 19 or
else the distributing auger 18 can be adjusted in height by
adjusting the height of the rear wheels 22 of the carrier frame 20
or the height of the coupling point 23 between the base paver 10
and the carrier frame 20.
[0038] FIG. 4 shows the carrier frame 20 with the front wheels 21
and the rear wheels 22 along with the paving screed 19 and the
distributing auger 18 for the upper paver 11. It can be seen from
this figure that the rear wheels 22 are mounted on a rear end of a
rocker 26. The opposite, front end of the rocker 26 can be pivoted
about a horizontal axis of rotation 27. In the exemplary embodiment
shown, at least one pressure-medium cylinder 28 serves to pivot the
rocker 26. The paving screed 19 is suspended on the rear end of a
levelling arm 29, preferably a pair of parallel levelling arms.
Mutually opposite front ends of the levelling arms 29 are pivotally
mounted on the carrier frame 20. The levelling arms 29 are
height-adjustable by means of at least one pressure-medium cylinder
30.
[0039] The carrier frame 20 shown in FIG. 4 is provided on its
front side with a storage container 31. This can be designed in
such a way that it enlarges the storage container 15 of the base
paver 10. However, it is also conceivable for the storage container
31 on the carrier frame 20 to replace the storage container 15 of
the base paver 10. In this case, prior to converting the base paver
10 into the multi-course paver, the storage container 15 should be
disassembled from the base paver 10. Furthermore, in the case of
the multi-course paver shown here, the storage container 31 is
assigned a tilting hopper 32 at the front end of the carrier frame
20. Likewise a tilting hopper 33 is assigned to the storage
container 34 of the upper paver 11. The storage container 31 on the
carrier frame 20 serves to hold the material for the road course
situated beneath the wearing course, preferably the binder course,
which is paved by the base paver 10. By contrast, the storage
container 34 serves to hold the wearing course material which is
paved by the upper paver 11.
[0040] As an alternative, it is also possible for the front part of
the carrier frame 20 to be assigned a conveying device, which
serves to charge the storage container 34 of the upper paver 11
with wearing course material. A separate charger is then
unnecessary. Instead, a lorry can be used to fill the storage
container 34 of the upper paver 11 by means of the conveying
device. Here, the lorry is, as usual, pushed forwards by the
multi-course paver. For this purpose, push rollers 35 which are
shown by way of indication in FIGS. 1 and 4, are provided in front
of the front wheels 21 of the carrier frame 20.
[0041] Between the upper paver 11 and the associated distributing
auger 18 is provided a device for transferring the wearing course
material, which is transported from the scraper conveyer of the
paver 11 to behind the latter, to in front of the lower
distributing auger 18. In the exemplary embodiment shown, this
device is a simple chute 36. The wearing course material passes
under gravitational force along the chute 36 to in front of the
distributing auger 18.
[0042] The method according to the invention proceeds with the
multi-course paver represented in FIG. 1 as follows:
[0043] Independent pavers are used to form the base paver 10 and
the upper paver 11. The carrier frame 20 is additionally required.
The base paver 10 and the upper paver 11 can be used independently
of one another, that is to say each individually, to pave
single-layer road surfaces. This means that the multi-course paver
according to the invention can be formed from two standard pavers,
it being the case that, in the exemplary embodiment shown, the
upper paver 11 is smaller than the lower base paver 10.
[0044] No alterations whatsoever are required on the lower base
paver 10 to form the multi-course paver. Only if, as in the
exemplary embodiment shown, the carrier frame 20 has a relatively
large storage container 31, the storage container 15 of the base
paver 10 may be disassembled beforehand.
[0045] From the upper paver 11 are to be removed the distributing
auger 18, the paving screed 19 and, if appropriate, the travelling
gear. The upper paver 11 is then arranged above the base paver 10
on the piggyback principle. In the case of the multi-course paver
shown here, the upper paver 11 is placed on the carrier frame 20.
This can take place after the carrier frame 20 has been connected
to the base paver 10. However, it is also conceivable first to
place the upper paver 11 on the carrier frame 20 and then, if the
distributing auger 18 and the paving screed 19 have not yet been
fastened to the carrier frame 20, to move the base paver 10 into
the carrier frame 20 from behind, as a result of which the lower
base paver 10 passes below the upper paver 11. Next, the paving
screed 19 for the wearing course material is fastened to the
levelling arms 29 on the carrier frame 20, and the distributing
auger 18 assigned to the upper paver 11 is connected to the carrier
frame 20.
[0046] The multi-course paver is converted back into two
stand-alone pavers in the reverse order. Then only the carrier
frame 20 remains unused.
[0047] As a departure from the above-described method, it is also
conceivable for the travelling gear of the upper paver 11, which
may be crawler-type travelling gear or wheel-type travelling gear,
to remain thereon. In that case the upper paver 11 is arranged with
its travelling gear on the carrier frame 20 above the base paver
10. However, the travelling gear of the upper paver 11 here hangs
in the air because the upper paver 11 is lifted onto the carrier
frame 20, its travelling gear being situated at a considerable
distance from the ground 12, thus not having any contact with the
ground 12. The weight of the entire multi-course paver with the
upper paver 11 rests either on the travelling gear 13 of the base
paver 10 or to some extent on the at least front wheels 21 and, if
appropriate, also rear wheels 22 of the carrier frame 20. The
entire multi-course paver is advanced exclusively and solely by the
travelling gear 13 of the lower base paver 10. The entire
multi-course paver is also steered only with the aid of the
travelling gear 13 of the base paver 10. To ensure that the wheels
21 and 22 of the carrier frame 20 do not interfere here, it is
possible for at least the front wheels 21 to be able to rotate
freely about vertical axes of rotation and thus to follow curving
movements of the multi-course paver, without steering being
required particularly for the front wheels 21 of the carrier frame
20.
[0048] As a departure from the exemplary embodiment described
above, it is possible according to the invention for the
multi-course paver to be formed even without the additional carrier
frame 20. In that case the multi-course paver consists essentially
only of the base paver 10 and the upper paver 11, which then alone
rests, without contact with the ground 12, on the base paver 10
serving as carrier. The distributing auger 18 and the paving screed
19 for the upper paver 11 are then suspended on the base paver 10
in a suitable manner, specifically behind its paving screed 17.
LIST OF REFERENCES
[0049] 10 base paver [0050] 11 upper paver [0051] 12 ground [0052]
13 travelling gear [0053] 14 paving direction [0054] 15 storage
container [0055] 16 distributing auger [0056] 17 paving screed
[0057] 18 distributing auger [0058] 19 paving screed [0059] 20
carrier frame [0060] 21 front wheel [0061] 22 rear wheel [0062] 23
coupling point [0063] 24 push point [0064] 25 bearer [0065] 26
rocker [0066] 27 axis of rotation [0067] 28 pressure-medium
cylinder [0068] 29 levelling arm [0069] 30 pressure-medium cylinder
[0070] 31 storage container [0071] 32 tilting hopper [0072] 33
tilting hopper [0073] 34 storage container [0074] 35 push roller
[0075] 36 chute
* * * * *