EP1767698A2 - Height-adjustable side cover for a screed of a road paver - Google Patents

Abstract

The device has two lifting mechanisms (72, 74) which are connected to a connecting element (82). A central adjustment device (62-66) is provided which cooperates with the connecting element so two separately lifting mechanisms are adjustable in height at the same time by manipulation of the adjustment device. The central adjustment device is mechanically, electrically and or hydraulically propelled. An independent claim is included for a method.

Description

The present invention relates to a device for adjusting a height of a side plate of a paver relative to a screed of the paver, the side shield by at least two separately height-adjustable lifting devices, which are attached to a main frame of the paver, which is connectable to the screed attached, lifted and can be lowered in order to prevent a built-in material from escaping sideways, before the building material is compacted by the screed to a road surface.

Furthermore, the present invention relates to a method for manufacturing a pavement with a paver, the a screed with a maximum paving width and which is provided with a device according to the invention, wherein the road surface to be produced has a width which is greater than the maximum installation width.

Side plates are known from the prior art in road pavers, which are adjustable by means of two separately adjustable lifting devices in height.

The term "paver" is understood below to mean a class of construction machines, such as e.g. Pavers with which so-called paving material of various qualities (such as asphalt, concrete or the like) can be laid on a subsoil intended for this purpose, such as, for example, asphalt. a planum, as far as possible in high compression quality just and profile-appropriate laid. Planum refers to a base course on which a road, a path, a building or similar can be built.

Regardless of what is to be built with a paver, the location and place of use itself can be very diverse, with pavers being generally used in road construction. Other applications are also possible.

Especially in road construction, however, it is often necessary to produce a varying road width. In particular, in the area of road junctions, land entrances or similar bulges, which lead to a widening of the "normal" road width, conventional road pavers are challenged.

In the prior art, so-called. Telescope collars are known with which varying road widths can be made. A screed then consists of several elements, of which at least one transverse to the installation direction, ie parallel to the width of the road, can be moved variably. In this way, different road widths can be made. However, this technique also reaches its limit, namely, when the telescopic screed is maximally extended.

In such a constellation, it is necessary in the prior art that slid in front of the screed promoted property manually by a worker, for example, with the aid of a shovel, laterally next to the screed to provide the required outside the reachable pave width paving. This manual operation is time consuming and physically demanding for a worker. Furthermore, due to an uneven material template quality disadvantages arise in this operation.

It is therefore an object of the present invention to provide an apparatus and a method which makes it possible to easily manufacture an over-wide road.

This object is achieved with a device for adjusting a height of a side plate of a paver according to the type mentioned above, wherein the two lifting devices are connected to one another with a connecting element and a central adjusting device is provided which cooperates with the connecting element such that the two separately height-adjustable Lifting devices are simultaneously height adjustable by actuation of the adjustment.

With the height adjustment device according to the present invention, the side plate of a paver can be easily lifted and lowered in a simple manner. The actuation of the two lifting devices is effected by a central movement of the adjusting mechanism according to the present invention. Manual operation of the lifting devices, as is common in the art, has only a secondary meaning. The sometimes very time and effort consuming Verstellarbeit deleted completely. The two lifting devices can be quickly raised and lowered together, so that a road widening beyond the permissible installation width can be done easily and quickly.

Another advantage of the present invention is that the device according to the invention can be easily and quickly mounted on existing side plates or their lifting devices, so that a conversion of a side plate according to the prior art towards a side plate according to the present invention easily, quickly and cost is possible.

According to a preferred embodiment, the central adjusting device is driven mechanically, electrically or hydraulically.

By this measure, eliminates the need to manually adjust the lifting devices, as is customary in the art, individually.

It is also advantageous if the lifting devices are realized as headstocks, which are each connected via a chain to the side plate, and when the connecting element is a traverse, which is connected to the central adjusting device.

To use headstocks as a lifting device is known from the prior art. This is an advantage of the present invention. The present invention can be applied to elements that already exist, so that no costly expensive conversion work is necessary to realize the invention.

According to a further preferred embodiment, the two separately height-adjustable lifting devices are arranged symmetrically to the side plate, and the central adjusting device is arranged centrally between the two lifting devices and connected to the main frame.

This arrangement geometry prevents the force exerted on the two lifting devices by the adjusting device according to the invention being distributed unevenly. Due to the symmetrical arrangement experienced both lifting devices an equally large force component, so that tilting of the side plate can be excluded.

In particular, the central adjusting device comprises an adapter plate, a drive unit and an adjustment mechanism, wherein the adapter plate and the adjustment mechanism are coordinated such that the adjustment gradually can cause a change in height by the adjustment on the adapter plate and climbs up, the adjustment mechanism in the Snap adapter plate when a desired height is reached.

The engagement of the adjustment mechanism in the adapter plate ensures that the desired height adjustment does not change during a work process. An adjustment mechanism, which can climb up or down on the adapter plate, can be produced in a simple manner. This results in a cost-effective production, so that, for example, a retrofitting of existing road paver can be done cheaply.

Another advantage is the fact that in addition a fold-off stripping device is provided, which is mounted laterally of the screed with a hinge on the main frame to, when the side plate is in a raised state, the built-in, then laterally next to the screed is led to strip.

By this measure, the operation is further simplified by the worker does not have to distribute the laterally conveyed next to the screed built-in to reduce it to a desired covering thickness. Similar to the screed, the scraper simply travels over the additional screed in addition to the screed and pulls this additional slick "smooth". This measure in turn increases the speed with which an additional road width can be made.

According to a preferred embodiment, the stripping device comprises a detent element with which the stripping device can be fixed relative to the main frame at a desired angle relative to an installation direction.

By providing a Rastierelements it is ensured that the stripping device is not folded back even with large amounts of built-in material, which is conveyed before the stripping, so that an extended stripping is ensured during the entire installation process.

Preferably, the stripping device is height adjustable relative to the main frame.

By this measure it is ensured that a covering thickness can be made laterally next to the screed of the paver, which differs from the lining thickness, which is made by the screed. For example, a thicker side coating could be made by the distance between scraper and planum is chosen to be greater than the distance between screed and Planum. Thus, a height dimension can be set, which end-compressed state of the covering can be achieved profile accurate.

In particular, the stripping device comprises an extension plate, with which a stripping length is variably adjustable.

If the stripping length provided by the stripping device itself is insufficient, an extension plate can be used to increase the maximum installation width required.

Furthermore, it is preferred if the stripping device comprises a heating element.

The heating element ensures that the built-in material, which is usually poured hot in front of the screed, does not stick to the scraper and affects the surface of the covering.

The inventive method comprises the following steps: adjusting the side plate in the raised state by operating the central adjusting device; Unfolding and locking the stripping device; Conveying the material to be installed via a distributing device upstream of the screed, in particular a screw, beyond the width of the screed; and stripping of beyond the screed also funded built-in.

In this way, a greater paving width can be achieved, as it is predetermined by the usual construction of the screed of the paver.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Fig. 1

eine schematische Seitenansicht eines Straßenfertigers mit einem höhenverstellbaren Seitenschild gemäß der vorliegenden Erfindung;

Fig. 2

eine schematische Draufsicht auf einen unteren Teil eines Straßenfertigers;

Fig.3

ein Seitenschild gemäß der vorliegenden Erfindung im abgesenkten Zustand; und

Fig. 4

ein Seitenschild gemäß der vorliegenden Erfindung im hochgezogenen Zustand.

Embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description. Show it:

Fig. 1

a schematic side view of a road finisher with a height-adjustable side plate according to the present invention;

Fig. 2

a schematic plan view of a lower part of a paver;

Figure 3

a side plate according to the present invention in the lowered state; and

Fig. 4

a side plate according to the present invention in the raised state.

In the following description, like elements will be denoted by like reference numerals. A paver becomes common with the. Reference numeral 10 are designated.

Fig. 1 shows a schematic side view of a road paver 10, which has a height-adjustable side plate according to the present invention.

The road paver 10 is movable in a driving and installation direction 14 using caterpillars 12, which can also be replaced by wheels. On the body 16 of the paver 10, a main frame 18 is attached to which in turn a screed 20 is attached. With the help of screed 20 to be produced road surface 22 is compacted and smoothed.

The screed 20 is connected to a lateral support frame 24, which may be formed in one or more pieces with the main frame 18.

The main frame 18, and thus also the elements 20 and 24 connected to it, can be height-adjusted or swiveled in the direction of an arrow 26. For this purpose, the main frame 18 may be connected, for example, with a lifting cylinder 27.

The built-in material, not shown in Fig. 1 is conveyed by means of a screw 28 transversely to the installation direction 14, that is perpendicular to the plane of the drawing of FIG. 1, before the screed 20 for subsequent compression. For this purpose, the built-in material is usually in a front portion 30 of the paver 10, for example, using a dump truck (not shown), tilted. The built-in material is then transported through the interior of the road paver 10 in the direction of the screw 28, which in turn distributes the built-in transverse to the direction of travel 14. In order not to distribute the building material beyond the width of the screed 20 addition, ie to ensure a well-defined edge of the road surface 22 to be produced, a so-called. Side shield 32 is provided. The side shield 32 is height-adjustable, as indicated by an arrow 34. In Fig. 1, the side plate 32 in a raised Condition (see also Fig. 4). During a manufacturing process, the side shield 32 is normally lowered almost to the level of the subgrade, so that no paving material is conveyed beyond the width of the screed 20.

FIG. 2 shows a schematic plan view of a lower part of a road paver 10.

It can be seen that two conveyors 36 and 38 are provided in the front part 30, with the aid of which delivered built-in material is transported in the direction of the screw 28, from where it is further distributed. This is schematically indicated by an arrow 40. The worm 28 distributes the material over the entire width, i. perpendicular to the direction of travel 14, the screed 20.

2, a screed 20 is shown, which extends beyond the width of the paver 10 on the left.

Furthermore, a stripping device 42 is shown schematically in FIG. The stripping device 42 comprises a stripping plate 44, which in turn is connected to a hinge 46. The hinge 46 is attached to the side support frame 24. Furthermore, the stripping device 42 may have a hand lever 48 to rotate the stripping device in the direction of the double arrow 49. In particular, the stripping device is designed to be height adjustable.

With a dashed line a Rastierstange 50 is shown. The Rastierstange 50 serves to fix the stripping device 42 relative to the lateral support frame 24th

In Fig. 2, the angle between the direction of travel 14 and the stripper plate 40 is substantially 90 °. This represents the usual working position of the stripping 42, to strip sideways next to the screed 20 supplied insert. For this purpose, the side plate 32 is sufficiently raised so that the distribution screw 28

Incorporated beyond the width of the screed 20 also in front of the stripping 42 promotes.

Of course, other angles between the stripper plate 42 and the direction of travel 14 can be adjusted. Preferably, the latching rod 50 is rotatably mounted on the stripping device 42 and has at its end facing the paver 10 a hook which can be hung in correspondingly prepared holes in the side support frame 24 (not shown). By varying the angle between the stripper plate and the direction of travel 14, the effective length of the stripper and thus the additional width of the pavement 22 to be manufactured can be varied.

It is understood that the hand lever 48 is provided only optional. Just as well, the stripping device 42 could be operated automatically. Further, the stripper plate 44 could be designed to be adjustable in axial length by the stripper plate 44 is either telescopic or other plate elements (not shown), which can be opened when needed.

Referring now to Fig. 3, a side shield 32 is shown in the lowered condition.

To adjust the relative height of the side plate 32, a central adjusting device 60 is provided. The central adjusting device 60 comprises a mechanism for lifting and lowering the side plate 32. The mechanism 62 can climb on an adapter plate 64, which has a Rastierleiste 66, or climb. For example, the adjustment mechanism of the invention could be similar to a jack. The Rastierleiste 66 of FIG. 3 has a toothing 68, with which the mechanism 62 can interact. The Rastierleiste 66 'of FIG. 4 alternatively has holes 70.

Returning to FIG. 3, so-called headstocks 72 and 74 are shown on the left and right of the central adjusting device 60. With the help of the headstocks 72 and 74, the relative height of the side shield 32 can be adjusted. The headstocks 72 and 74 each include a hand lever 76 for manually adjusting the height by turning. At their opposite end they have chains 78 which are fixedly connected to the side plate 32. Inside the headstocks a threaded shaft 80 is provided, with the help of the height adjustment can be performed.

According to the present invention, these two headstocks are now connected rigidly to one another by means of a connecting element or a cross member 82. Traverse 82 is configured to include two bearing units (not shown) for receiving the headstocks 72 and 74. The headstocks are threaded side each connected to corresponding threaded holes in a guide pin. These guide pins can be adjusted via the spindle operation. The guide pins are guided in vertically extending pipe guides, resulting in a downwardly formed U-shaped guide unit.

Guide pins connected to the headstocks have at their lower end a receptacle for the chain links 78. The chain links 78 provide the vertical connection to the side shield 32 and are dimensioned so that they can also be absorbed by the pipe guides. Due to this arrangement, it is possible, the side plate 32 by means of the lifting devices 72 and 74, and thus also by means of the central adjusting device 60, gradually and quickly to move parallel up or down. Nevertheless, the possibility of manual actuation of the headstocks is maintained.

The downward movement is indicated in Fig. 3 by an arrow 84. In Fig. 4, the upward movement is illustrated by an arrow 86.

Also shown in FIG. 3 is the nest 88 which is transported by the auger 28 shown in FIGS. 1 and 2 toward the side end of the screed 20. The auger 28 is not shown in FIG.

In Fig. 4, the side plate is shown in a raised position. The height difference .DELTA.H can be clearly seen and is well above the height difference that is usually achieved with lifting devices that do not interact with the central adjustment device 60 according to the invention. The height difference ΔH makes it possible to transport the building material laterally next to the screed. If there is a stripping direction 42 (see Fig. 2), this laterally transported paving material can be smoothed quickly and easily.

Claims (11)

Device (60) for adjusting a height of a side plate (32) of a paver (10) relative to a screed (20) of the paver (10), wherein the side plate (32) by at least two separately height adjustable lifting devices (72, 74) on a main frame (18, 24) of the paver (10), which is connectable to the screed (20), are mounted, can be raised and lowered to prevent a built-in (88) on a side escape before the property ( 88) from the screed (20) to a road surface (22) is compressed, characterized in that the two lifting devices (72, 74) with a connecting element (82) are interconnected, and that a central adjusting device (62-66) is provided is that cooperates with the connecting element (82) such that the two separately height-adjustable lifting devices (72, 74) by an operation of the adjusting device (62-66) are simultaneously height adjustable. Device according to claim 1, characterized in that the central vetstelleseinichtung (62-66) is driven mechanically, electrically or hydraulically. Apparatus according to claim 1 or 2, characterized in that the lifting devices (72, 74) by headstocks (72, 74) are realized, which are each connected via a chain (78) with the side plate (32), and that the connecting element ( 82) is a traverse (82) which is connected to the central adjusting device (62-66). Device according to one of the preceding claims, characterized in that the two separately height-adjustable lifting devices (72, 74) are arranged symmetrically to the side plate (32), and that the central Adjusting device (62-66) is arranged centrally between the lifting devices (72, 74) and connected to the main frame (18, 24). Device according to one of the preceding claims, characterized in that the central adjusting device (62-66) comprises an adapter plate (64), a drive unit and an adjusting mechanism (62), wherein the adapter plate (64) and the adjusting mechanism (62) so matched are that the adjustment mechanism (62) can gradually bring about a change in height by the adjustment mechanism (62) on the adapter plate (64) climbs on and off, the adjustment mechanism (62) can engage in the adapter plate (64) when a desired height is reached. Device according to one of the preceding claims, characterized in that in addition a fold-out stripping device (42) is provided, which is attached laterally to the screed (20) with a hinge (46) on the main frame (24), when the side plate ( 32) is in a raised state, the built-in material (88), which is then guided laterally next to the screed (32) strip. Apparatus according to claim 6, characterized in that the stripping device (42) comprises a detent element (50) with which the stripping device (42) with a desired angle relative to a mounting direction (14) relative to the main frame (24) can be fixed. Apparatus according to claim 6 or 7, characterized in that the stripping device (42) is height-adjustable relative to the main frame (24). Device according to one of claims 6 to 8, characterized in that the stripping device (42) comprises an extension plate with which a stripping length is variably adjustable. Device according to one of claims 6 to 9, characterized in that the stripping device (42) comprises a heating element. A method of making a pavement with a paver having a screed (32) with a maximum paving width and provided with an apparatus according to any of claims 6 to 10, wherein the paving (22) to be made has a width greater than that maximum pave width is, with the steps: Adjusting the side plate (32) in the raised state by operating the central adjusting device (62-66); Unfolding and locking the stripping device (42); Conveying the insert (88) via a Verteileinrichtu.ng (28) upstream of the screed (20), in particular a screw (28), beyond the width of the screed (32) out; and Wiping off over the screed (32) also conveyed out (88).

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