Apparatus for inserting netting into a ground surface and method for accomplishing same
This invention relates to an apparatus for pressing netting to support turf and the like into the ground surface and is also applicable to the location of small net elements in the ground surface and also the laying of stolons into the soil surface. 
     Turf netting may be laid on the ground surface where turf is to be sown so as to stabilise the surface and prevent the movement of the top soil by wind and the like and, normally, to locate such netting, it is necessary to remove the netting from a roll and to peg it or otherwise physically connect it to the surface to prevent movement thereof. 
     This arrangement, whilst quite satisfactory practically, is nevertheless labour intensive and thus time consuming and costly. 
     It is also desirable when stolons are to be planted that these be located into the soil surface and, again, this is a labour intensive, time consuming and a somewhat difficult procedure. 
     Also there are applications when small mesh elements such as those sold as Netlon (registered trade mark) mesh elements are to be located in a surface, such as a sand surface. 
     These elements are normally located before the laying of sod, particularly washed sod, to provide a consolidated surface onto which the sod grows. 
     This is particularly useful in such areas as, say, racecourses and the like where the turf, when established, is likely to be cut and moved by horses&#39; hooves. 
     It is the object of the present invention to provide an apparatus which will locate netting an other materials automatically and accurately. 
     The invention, in its broadest sense, provides an apparatus to insert netting or other articles into the ground surface which includes a frame adapted to be connected to a prime mover and having a roller transverse to the direction of normal movement of the frame, the roller having spaced annular extensions thereabout, the roller limiting the depth of entry into the ground of the extensions to the radius of the annulus formed by the extensions, and vibration means associated with the roller which caused the roller to vibrate, the extensions being capable of effectively fluidising the ground surface so that the netting or other article fed to the underside of the roller can be located in or under the ground surface by pressure from the discs whilst the ground is fluidised. 
     In one aspect the invention is used to locate turf netting into the ground surface and the material to be located by the roller is netting in a sheet form which is fed to the underside of the roller. 
     The frame may be adapted to be connected to the three point linkage of a tractor, and the vibrating means, may be powered from the power take off of the tractor. 
     The netting tan be delivered from a carrier mounted, either forwardly of the apparatus of the invention, or on the front of the prime mover. 
     The apparatus is also useful for locating solons on or in the ground surface and again these are fed to the forward side of the roller and, further the apparatus can be used for locating Netlon mesh elements into a prepared surface before the laying of washed turf. 
     The invention also provides a method of inserting a mesh or the like into the ground surface comprising passing the mesh beneath a roller transverse to the direction of normal movement of a prime mover, the roller having spaced annular extensions thereabout, the roller limiting the depth of entry into the ground of the extensions to the radius of the annulus formed by the extensions, vibrating the roller to cause the extensions to effectively fluidise the ground surface so that material fed beneath the roller is located in or under the ground surface by downward pressure from the discs whilst the ground is fluidised. 
    
    
     In order that the invention may be more readily understood, we shall describe, in relation to the accompanying drawings, one particular embodiment of device made in accordance with the invention. 
     In these drawings: 
     FIG. 1 shows a side view of a prime mover, being a tractor, having the apparatus of the invention attached to its linkage and power take off and a feeder attached to the forward end thereof; 
     FIG. 2 is a perspective view of the apparatus of the invention separate from the prime mover; 
     FIG. 4 is a front view of the eccentric weight which causes the vibration and as shown in FIG. 2; and 
     FIG. 3 is a view showing the location of the roller relative to the ground surface when laying mesh; 
    
    
     The apparatus 10 a frame 20, which includes a forward portion 21 which extends upwardly, and is provided with connections 22, 23, 24 for a three point linkage. 
     It has a pair of spaced transverse members 25, 26, between which the roller 30 is to be located. 
     The transverse members 25, 26, are connected at the end by a pair of members 27, 28 which are provided with bearing journals 29 at each end to receive an axle 31 of the roller. 
     The roller has a cylindrical body 32, and has along its periphery, a number of evenly spaced annular extension 33, with the annular radial width of these being substantially equal to the depth at which the netting is to be located. 
     A preferred spacing of the discs could be of the order of between seventy five and one hundred and fifty millimeters, but this is not limiting. 
     Mounted for rotation on the frame and above the roller, there is a vibration device 40, which includes an input shaft 41 which has a rotatable out of balance mass 42 thereon, rotation of which provides the required vibration. 
     The input shaft is connectable to the power take off of the tractor each directly or through a gear box. The shaft 41 is journalled into the frame using bearings which can accept rapidly changing radial forces. 
     Vibrators per se are known, and a conventional vibrator can well be used. 
     The arrangement is such that, when the roller 30 is on the ground surface, normally under its own weight, but it could be under a downward pressure from the three point linkage, and the tractor is moved forwardly with the vibrator 40 in operation, the vibration, through the extension 33, will effectively fluidise the ground surface. 
     If, then, a plastic netting 50 is located beneath the roller, this mesh will be forced into the fluidised surface to approximately the depth of the extension 33, and, as the tractor moves forwardly, the surface material will consolidate, and the mesh will be positively located below the surface, and will be unable to move. 
     The roll of netting 51 which is to be located below the surface, can either be positioned in front of the frame 20 of the apparatus, with the net passing downwardly and beneath the roller 30, or, alternatively, and as illustrated, on a frame 12 on the front of the tractor 11, and passed beneath the tractor, and thus to the underside of the roller. 
     Either system is satisfactory. 
     It may be preferred that the roll of mesh is driven, so that the required quantity of mesh can be metered out as the tractor moves forwardly, so there is no stretching or distortion of the net. 
     The device can either be used on a natural surface, or a prepared surface, and we find that under both such applications, good application of the net is obtained. 
     It will be seen that as the net 50 is positively located a certain distance below the ground surface, even disturbances to the surface, as by wind moving some of the planted material before it has struck, or the growth of vegetation, will not cause the net to move. 
     The device of the invention can also be used if other materials need to be located beneath the ground surface. One particular application is the sowing of stolons, which can be fed with their lengths basically along the line of the axis of the roller in front of the roller, and they will be moved beneath the ground surface by the fluidisation process in a manner similar to that described for the netting. 
     The device is also useful for locating Netlon mesh elements in, say, a sand surface which has been prepared to receive washed sod. 
     These elements assist in the consolidation of the surface when the sod roots therein and are often used in such areas, as, for example, race tracks. 
     Whilst we have described one particular arrangement of device incorporating the invention and three applications, it will be appreciated that there can be other variations.