NL2020663B1 - Compaction board - Google Patents

Abstract

The invention relates to a compaction board, comprising: - a plate with a bottom edge extending in a first direction; and - an arm which is arranged tiltably on the plate around a first axis perpendicular to the plate, which arm is provided at a free end with coupling means for coupling the arm to a vehicle, such as an excavator wherein the arm is further between a first and second positions are adjustable on the first axis so that the arm clamps against the plate when a force is applied to the first axis.

Description

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The Netherlands © 2020663

B1 PATENT (21) Application number: 2020663 @ Application submitted: 26 March 2018

g) Int. Cl .:

E02F 3/96 (2018.01) E01C 23/08 (2019.01) E02F 3/76 (2019.01) E01H 5/06 (2019.01) E02F 5/30 (2019.01) E02F 3/815 (2019.01)

(T) Application registered: (73) Patent holder (s): October 2, 2019 Pieter Petrus Cornells van der Voort in Jubbega. (43) Application published: (72) Inventor (s): (n) Patent granted: Pieter Petrus Cornells van der Voort October 2, 2019 in Jubbega. (45) Patent issued: October 3, 2019 (74) Agent: ir. B.J. 't Jong in Enschede.

© Compacting board © The invention relates to a compacting board, comprising:

- a plate with a lower edge extending in a first direction; and

- an arm which is arranged tiltably on the plate around a first axis perpendicular to the plate, which arm is provided at a free end with coupling means for coupling the arm to a vehicle, such as an excavator wherein the arm is further between a first and a second position is adjustable on the first axis so that the arm clamps against the plate when a force is applied to the first axis.

NL B1 2020663

This patent has been granted regardless of the attached result of the research into the state of the art and written opinion. The patent corresponds to the documents originally submitted.

Compaction board

The invention relates to a compaction board, comprising:

- a plate with a lower edge extending in a first direction; and

- an arm which is arranged tiltably on the plate around a first axis perpendicular to the plate, which arm is provided at a free end with coupling means for coupling the arm to a vehicle, such as an excavator.

Such compaction boards, also known as the soil scraper, are used to move soil, sand or other material such as snow with the lower edge or to level them over surfaces, or to smoothly surface paved surfaces such as streets, by fixing the compaction board on a vehicle, such as an excavator, and by thereby pulling the compaction board over the surface, for example by moving the vehicle or by moving the compaction board relative to the vehicle. Because the arm is rotatably arranged around the axis, the plate can tilt from a neutral position with respect to the arm to a corrected position in order to correct for non-straight surfaces.

Examples of such compaction boards are the compaction boards according to publication WO 2013/132248 A1, as well as the compaction boards as offered by Betuwsche Bouwmachinehandel, Zelten, the Netherlands.

However, it has been found that this tilt causes the plate to be unstable, which reduces the efficiency of the use of the relevant compaction board.

It is now an object of the invention to reduce or even prevent the above problems.

This object is achieved with a compaction board according to the preamble, wherein the arm is furthermore adjustable between a first and a second position on the first axis so that the arm clamps against the plate when a force is exerted on the first axis.

In addition to the rotatability about the first (physical) axis, the arm is thus furthermore also arranged with a certain play around the first axis, which adjustment of the arm relative to the rotation about the first axis from the neutral to the corrected position of the preferably flat plate between a first and second position, in order to clamp the arm against the plate in the corrected position when exerting force on the first axis (for example during the use of the compacting board as described above) . As a result, the plate remains more stable in the position corrected for the course of the surface. As soon as the compaction board is subsequently lifted from the surface being treated, the plate will return to the neutral position as a result of its gravity being released from the ground under the influence of gravity. The lower edge is then preferably a straight edge extending in the first direction.

In a first preferred embodiment of the compaction board according to the invention, the arm is tilted relative to the first position in the second position around at least one of a second and third axis, which second and third axis are perpendicular to the first axis and to each other.

In this embodiment, the above-mentioned clearance therefore consists of a tiltability around at least one (usually virtual) axis, namely the second and / or the third axis, whereby an end of the arm comes into frictional contact with the plate. The second axis is perpendicular to the first direction and the third axis runs parallel to the first direction.

In a second preferred embodiment of the compaction board according to the invention, the arm is shifted in axial direction over the first axis relative to the first position in the second position.

In this embodiment, the above-mentioned clearance consists, therefore, of a slidability in axial direction along the first axis, also in order to achieve frictional contact between arm and plate.

In a third preferred embodiment of the compaction board according to the invention, the maximum distance between the arm and the plate along the first axis is between 1 and 5 millimeters, preferably about 2 millimeters.

It has been found that 1 millimeter of space in the axial direction leaves sufficient room for the aforementioned adjustability. Distances greater than 5 millimeters cause the compaction board to become more unstable and produce more noise. Although 1 millimeter is sufficient for the intended clearance, a space of approximately 2 millimeters is preferred.

In a fourth preferred embodiment of the compaction board according to the invention, the arm comprises, opposite the free end, a further plate extending substantially parallel to the plate with an opening through which opening the first axis extends.

In this case it is therefore the further plate with the opening that provides the connection of the arm with the first axis and thus the plate. A further plate has the advantage that it can more easily achieve the desired frictional contact as described above.

In a fifth preferred embodiment of the compaction board according to the invention, the opening is arranged in the upper half of the further plate.

By arranging the opening in the upper half of the further plate, a relatively small rotation around the first axis results in a greater tilt of the further plate with respect to the plate, so that a more precise limitation of the rotation of the further plate around the first axis with respect to the plate can be achieved. Placement of the opening in the first direction near or in the middle of the further plate is thereby preferred in view of the stability of the compacting board.

Upper half and similar terms such as those used above with regard to these and other preferred embodiments are used in proportion to the lower edge of the plate. The further plate can for example be divided into a lower half close to the lower edge, and an upper half adjacent to the lower half, which further away from the lower edge.

In a sixth preferred embodiment of the compaction board according to the invention, the first axis is above the center of gravity of the plate.

When the first axis is above the center of gravity of the plate, and preferably in the first direction near or in the middle, this increases the stability of the compaction board.

In a seventh preferred embodiment of the compaction board according to the invention, the arm extends between the plate and a valve fixed to the plate.

In this way a reliable locking of the arm on the first axis and thus on the plate is achieved. Preferably, it is the optional further plate of the arm that extends at least partially between the plate and the valve.

In an eighth preferred embodiment of the compaction board according to the invention, the valve comprises a closing plate, which closing plate is attached to the plate along two edges running along the plate substantially parallel to the lower edge on either side of the axis.

The design of the valve as a closing plate attached to the plate along two such edges gives in any case the possibility of covering the part of arm between the valve and the plate.

In a ninth preferred embodiment of the compaction board according to the invention, the valve limits the tilt of the arm about the first axis.

In that case, the valve is provided with an element that prevents the arm from pivoting or tilting around the first axis outside a certain defined area. In a simple variant, this boundary is formed by the edges according to the eighth preferred embodiment of the compacting board.

In a tenth preferred embodiment of the compaction board according to the invention, the arm extends obliquely upwards, preferably at an angle of between 30 and 60 degrees with respect to the plate, preferably about 45 degrees.

Such chosen angles, measured between the plane through the plate and the plane through the coupling means, contribute to the stability of the compaction board.

In an eleventh preferred embodiment of the compaction board according to the invention, the rotation of the arm about the first axis is limited between 2 and 15 degrees, preferably about 6 degrees in each of the two directions of rotation.

Such a limit (of a total of approximately 4 to 30 degrees) gives sufficient possibilities for adjustments to irregularities in the surface to which the compaction board is applied, but at the same time does not give so much freedom of rotation that the compaction board becomes unstable. A limit of approximately 6 degrees (on both sides, so a total of approximately 12 degrees of freedom of rotation) is a good compromise.

In a twelfth preferred embodiment of the compaction board according to the invention, the lower edge is a flexible lower edge such as an elastic lower edge.

Flexible lower edges such as elastic lower edges have the advantage that they lead to a good result when sliding paved surfaces clean. This is preferably a rubber strip with steel wires running perpendicular to the lower edge, in order to give the strip the required rigidity.

The invention further relates to a vehicle such as an excavator with coupling means, and a compaction board according to the invention, which compaction board is coupled to the coupling means of the vehicle with the coupling means of the compaction board.

The coupling means may, for example, comprise a coupling system such as a quick coupler, which coupling system may be mounted on the boom of the excavator.

These and other aspects of the invention are further elucidated with reference to the accompanying drawings.

Figure 1 shows a section of a compaction board according to the invention.

Figures 2A, 2B and 2C show a partial view of the compaction board according to figure 1 from a vehicle to which the compaction board is attached in a neutral and two corrected positions.

Figure 3 shows a side view of the compaction board according to Figure 1.

Figure 1 shows a cross-section of a compaction board 1 according to the invention along the line I-I in Figure 2A. The compaction board 1 comprises a plate 2 with a first axis 3 and a closing plate 4 mounted thereon. Between the closing plate 4 and plate 2 a further plate 5 of arm 6 is arranged, which in addition to the tilt about first axis 3 can also tilt about virtual second axis 7 and around the line II as indicated in Figure 2A (the virtual third axis). Shifting of the arm 6 over the first axis 3 is also possible over a distance A which is preferably at most 1 to 5 millimeters, preferably about 2 millimeters. As a result, the plate 5 can tilt and come to stand at an angle B. The desired frictional contact between further plate 5 and plate 2 can occur as a result of both the axial shift over the first axis 3 and the tilt about the virtual second axis 7 and / or the line I-I in Figure 2A.

Figure 2 shows the compaction board 1 in a neutral position (Figure 2A) and two extreme corrected positions (Figures 2B, 2C), in which the rotation relative to the neutral position is between 2 and 15 degrees, preferably about 6 degrees in the first (Figure 2B) and opposite (Figure 2C) direction of rotation, measured as indicated in Figure 2B. As can be seen from the figures, the rotation around the first axis 3 is limited by the closing plate 4. At the bottom, the elastic bottom edge 9 is visible.

Figure 3 shows a side view of the compaction board 1. Here, it is clearly visible that the arm 6 runs obliquely upwards at an angle D of between 30 and 60 degrees with respect to the plate, preferably about 45 degrees. Attached to the free end 10 of arm 6 opposite further plate 5 are coupling means (not shown) for coupling to a boom of an excavator.

The distance between the plate 2 and end 10 measured at the end is preferably between 200 and

800 millimeters, with distance E being 300 millimeters and distance F being 650 millimeters. In this way the compaction board has proved easier to handle by an excavator.

Claims (14)

Conclusions 1. Compaction board comprising: - a plate with a lower edge extending in a first direction; and - an arm which is arranged tiltably on the plate around a first axis perpendicular to the plate, which arm is provided at a free end with coupling means for coupling the arm to a vehicle, such as an excavator, characterized in that the arm further adjustable between a first and a second position on the first axis so that the arm clamps against the plate when a force is exerted on the first axis. Compaction board according to claim 1, wherein the arm is tilted with respect to the first position in the second position around at least one of a second and third axis, which second and third axis are perpendicular to the first axis and to each other. Compaction board according to claim 1 or 2, wherein the arm is shifted in axial direction relative to the first position in the second position along the first axis. Compaction board according to claim 1, 2 or 3, wherein along the first axis the maximum distance between the arm and the plate is between 1 and 5 millimeters, preferably about 2 millimeters. Compaction board according to one of the preceding claims, wherein the arm opposite the free end comprises a further plate with a hole extending substantially parallel to the plate, through which opening the first axis extends. Compaction board according to claim 5, wherein the opening is arranged in the upper half of the further plate. Compaction board according to one of the preceding claims, wherein the first axis is above the center of gravity of the plate. Compaction board according to one of the preceding claims, wherein the arm extends between the plate and a valve fastened to the plate. Compaction board according to claim 8, wherein the valve comprises a closing plate, which closing plate is attached to the plate along two edges running along the plate substantially parallel to the lower edge on either side of the shaft. Compaction board according to claim 8 or 9, wherein the valve limits the tilt of the arm about the first axis. Compaction board according to one of the preceding claims, wherein the arm extends obliquely upwards, preferably at an angle of between 30 and 60 degrees with respect to the plate, preferably about 45 degrees. Compaction board according to one of the preceding claims, wherein the rotation of the arm around the first axis is limited between 2 and 15 degrees, preferably about 6 degrees in each of the two directions of rotation. Compaction board according to any of the preceding claims, wherein the lower edge is a flexible lower edge such as an elastic lower edge. A vehicle such as an excavator with coupling means, and a compaction board according to any one of the preceding claims, which compaction board is coupled to the coupling means of the vehicle with the coupling means of the compaction board. 1/2 2 7