DE29914032U1 - Device for flat drainage of heavily used lawns - Google Patents

Description

Applicant:

DIEZ GmbH

Oberneul Ib

8 6551 Aichach / DE

Representative:

Patent attorneys

Dipl.-Ing. H.-D. Ernicke

Dipl.-Ing. Klaus Ernicke

Schwibbogenplatz 2b 8 6153 Augsburg / DE

Date:

File:

10.08.1999
500-241/1 ern/he

OJ DE-G 299 14 032.6

CHANGED DESCRIPTION INTRODUCTION

Device for flat drainage of lawns

The invention relates to a device for flat drainage of lawns with the features specified in the preamble of the claim.

In the case of heavily used lawns, the constant intensive and sporting strain causes a relatively strong compaction of the turf, which in turn is the reason why intensive rain remains on the surface and cannot quickly seep into the subsoil of the lawn.

In golf course construction, it is known to create deep trenches using milling machines, which have a width of 20 cm and a depth of 50 cm, for example, after which these trenches are filled with gravel or quartz sand and drain pipes, as is also known from DE-39 43 190

2.5. Such a procedure is understandably not applicable in the construction of sports facilities.

The invention is therefore based on the object of providing the highly stressed lawn area of sports facilities or the like with a flat drainage system which is relatively inexpensive in terms of the equipment required and which results in the lawn area being usable again a short time after the flat drainage.

To solve this problem, the features known from DE-39 43 190 are used, namely a device for flat drainage of lawns with a

driven shaft extending transversely to the direction of travel with a device for excavating a slot and a blade engaging in the slot through which a free-flowing material is guided to fill the slot, the blade being connected to a storage container via a pipe or hose.

The invention differs from this in that for the flat drainage of highly stressed lawns, in particular in the field of sports field construction, several rows of blades with alternating lateral offsets are arranged on the shaft at a distance of, for example, 20 cm to 30 cm, each of which creates a narrow but deep slit in the turf, with a share arranged downstream of each row of blades.

The invention is therefore based on the general idea of carrying out slot formation and filling in one operation, without drain pipes or the like having to be inserted into the slot.

In a preferred embodiment of the invention, the device is designed as an attachment to a tractor with a cardan shaft for driving the blade shaft. 25

In practice, the device according to the invention moves over the lawn, creating narrow but deep slits and immediately filling them almost to the surface with a free-flowing material. In this way, for example, a sports field can be provided with the flat drainage according to the invention within a few hours, whereby it is recommended that the slits are filled up to near the top edge of the slit and the remaining slit space is filled by dragging the ejected material. This filling is usually achieved by drag nets that are pulled across the lawn by the tractor.

Within the scope of embodiments of the invention, it is recommended, for example, to use the blades to create a cutting depth of, for example, 15 to 25 cm with a slot width of, for example, 3 to 4 cm. These dimensions, to which the invention is not limited, have proven themselves in the flat drainage of sports fields or the like. When working on differently designed surfaces, the slot width and depth as well as their spacing can of course be changed as desired.

It is recommended that the individual blades have approximately the same width as, or a little less than, the width of the slot to be created. This ensures that the free-flowing material can penetrate into the slot without loss. A suitable material is, for example, 2-8 mm washed empty gravel or washed quartz sand with a grain size of 1-3 mm. The slot should be filled up to near the top edge of the slot so that the remaining protective space can be completely filled by carrying away the ejected material.

After this type of treatment, the lawn can be sown immediately. The lawn will be fully operational again approximately four weeks later. ' :

Details of the invention are shown schematically and by way of example in the drawing. They show:

Figure 1: a schematic side view of a tractor with an attachment for

Creation and filling of soil slots,

Figure 2: a schematic, greatly enlarged vertical section through the

Slotting device with subsequent filling arrangement and

Figure 3: a vertical cross-section through the turf with slots in it

and their filling.

In the example of Figure 1, a tractor (16) is shown in a schematic side view, on the rear of which an attachment unit (15) is arranged and equipped with a cardan shaft (17), whereby a shaft (2) carrying blades (3) is set in rotation in order to create a narrow but relatively deep slot (5) in the turf (8) in one or more places.

(5) a coulter (7) is to be filled from a storage container (9) via a hose (14) or another connecting element, which reliably fills the empty gravel or washed quartz sand located in the container (9) into the slot (5).

In the example in Figure 2, an enlarged vertical sectional view shows that several projecting blades (3) are attached to the shaft (2) via the disk (18) connected to it, which are alternately bent laterally. This enables the blades to rotate in the direction of the arrow (19) in the

To create a relatively deep slot (5) in the turf (8). The material ejected by the blades (3) is deposited on the turf (8) to the side of the slot (5).
5

As already mentioned, the blades (3) have laterally bent front parts in order to dig out a relatively narrow slot (5).

&iacgr;&ogr; In the example of Figure 2 it is also shown that a blade (7) is arranged for each slot at a relatively close distance to the orbit (6) of the blades (3), through which empty gravel (12) or washed quartz sand can be introduced into the slot (5). The empty gravel (12) is contained in a storage container (9) which is a component of the device (1) or the attachment (15).

The width of the blade (7) is approximately adapted to the width (11) (see Figure 3) of the individual slot (5). It is advisable to allow the blade (7) to penetrate completely into the slot (5) almost to the bottom. This ensures that the blade (7) almost completely fills the individual slot (5) with the empty gravel (12) or the washed quartz sand. Figure 3, for example, shows the distance (13) between the surface of the empty gravel filling (12) and the surface of the turf (8). The material from the turf (8) thrown out during milling is later refilled in this remaining cavity by dragging it in a conventional manner.

In the example of Figure 3 it is shown that the distance (4) between the bent blades (3) is approximately 20 to 30 cm, in particular 25 cm. The width of the slot (5) can be, for example, 3 to 4 cm, in particular 3.5 cm. The cutting depth (10) for the individual

Slot (5) can be in the range of 15 to 25 cm.

These dimensions are examples and limit the teaching of the invention and can be varied as required.

Empty gravel with a grain size of 2 - 8 mm or quartz sand with a grain size of 1-3 mm, washed in each case, has proven to be suitable as a free-flowing material (12). These specifications can also be changed as required.

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PARTS LIST Device 1 Wave 2 cranked knives 3 Distance 4 slot 5 Orbit of the knives 6 Flock 7 Turf 8th Storage container 9 Cutting depth 10 Slot width 11 Empty gravel or washed quartz sand 12 distance 13 Hose 14 Attachment 15 tractor 16 Cardan shaft 17 disc 18 Rotation direction 19 Feed direction 20

Claims (6)

1. Device for flat drainage of lawns with a driven shaft ( 2 ) extending transversely to the direction of travel with a device for digging a slot ( 5 ) and a blade ( 7) engaging in the slot (5 ) through which a free-flowing material ( 12 ) is guided to fill the slot, the blade ( 7 ) being connected to a storage container ( 9 ) via a pipe or hose ( 14 ), characterized in that for flat drainage of heavily used lawns, in particular in the field of sports field construction, several rows of blades ( 3 ) with alternating lateral offsets are arranged on the shaft ( 2 ) at a distance ( 4 ) of, for example, 20 cm to 30 cm, each of which creates a narrow but deep slot ( 5 ) in the turf ( 8 ), a blade ( 7 ) being arranged downstream of each row of blades. 2. Device according to claim 1, characterized in that the knives ( 3 ) produce a cutting depth ( 10 ) of, for example, 15 cm to 25 cm with a slot width ( 11 ) of, for example, 3 cm to 4 cm. 3. Device according to claim 1 or 2, characterized in that the individual blade ( 7 ) has approximately the same or slightly smaller width as the width ( 12 ) of the slot ( 5 ) to be produced. 4. Device according to claim 1 or one of the following, characterized in that the device ( 1 ) is designed as an attachment unit ( 15 ) to a tractor ( 16 ) with a cardan shaft ( 17 ) for driving the knife shaft ( 2 ). 5. Device according to claim 1 or one of the following, characterized in that 2 mm to 8 mm washed empty gravel ( 12 ) or washed quartz sand with a grain size of 1 mm to 3 mm is provided for filling the slots ( 5 ). 6. Device according to claim 1 or one of the following, characterized in that the slot filling ( 12 ) takes place up to close to the upper edge of the slot ( 8 ) and the remaining slot space is filled by carrying away the ejected material.