US20190127926A1 - Device for Inserting Artificial Grass Strands into the Ground - Google Patents

Device for Inserting Artificial Grass Strands into the Ground Download PDF

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Publication number
US20190127926A1
US20190127926A1 US16/176,092 US201816176092A US2019127926A1 US 20190127926 A1 US20190127926 A1 US 20190127926A1 US 201816176092 A US201816176092 A US 201816176092A US 2019127926 A1 US2019127926 A1 US 2019127926A1
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United States
Prior art keywords
artificial grass
drum
clamps
grass strand
clamp
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Abandoned
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US16/176,092
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English (en)
Inventor
Thomas Schuurman
George Mullan
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Sisgrass Bv
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Sisgrass Bv
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Application filed by Sisgrass Bv filed Critical Sisgrass Bv
Priority to US16/176,092 priority Critical patent/US20190127926A1/en
Publication of US20190127926A1 publication Critical patent/US20190127926A1/en
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C13/00—Pavings or foundations specially adapted for playgrounds or sports grounds; Drainage, irrigation or heating of sports grounds
    • E01C13/08—Surfaces simulating grass ; Grass-grown sports grounds
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C11/00—Transplanting machines
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C15/00—Making pile fabrics or articles having similar surface features by inserting loops into a base material
    • D05C15/04—Tufting
    • D05C15/08—Tufting machines
    • D05C15/16—Arrangements or devices for manipulating threads
    • D05C15/18—Thread feeding or tensioning arrangements
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C13/00—Pavings or foundations specially adapted for playgrounds or sports grounds; Drainage, irrigation or heating of sports grounds
    • E01C13/08—Surfaces simulating grass ; Grass-grown sports grounds
    • E01C2013/086—Combination of synthetic and natural grass

Definitions

  • the present invention relates to the creation of hybrid grass surfaces, wherein natural grass and artificial grass are mixed.
  • Hybrid grass pitches are known and have been used for some years. A significant number of hybrid grass pitches has now been laid.
  • One well-known example is the grass pitch of Wembley Stadium in London.
  • a hybrid grass pitch has various advantages over a natural grass pitch, and also various advantages over a fully artificial grass pitch.
  • One advantage of a hybrid grass surface over a natural grass surface is that the durability is greater. Up to twice as many hours of sport per year can be played on a hybrid grass pitch as on a natural grass pitch.
  • Another advantage over natural grass is that the grass pitch remains green at all times. In addition, less pollen are released on use.
  • the artificial grass strands effectively act as reinforcement to the ground and retain the pollen in their location.
  • a further associated advantage is that the surface is stiffer and can better resist impact and can be used more easily for other activities such as a concert. This is because the roots of the grass strands grow through the artificial grass strands. In addition, a hybrid grass surface drains better because the injected artificial grass strands form vertical drainage channels.
  • An advantage of a hybrid surface over a fully artificial grass surface is that the majority of the grass strands are natural, including the associated properties which are relevant for walking, running and rolling a ball. Also, the fragrance of a hybrid grass pitch is the same as that of a natural grass pitch.
  • EP1384817 describes another machine for creating hybrid grass surfaces.
  • a single artificial grass strand is wound in a helical pattern around a drum. Then the single strand is cut into a plurality of strands by means of a cutting device. The strands are then inserted in the ground with an insertion device.
  • the present invention is based on the insight that the known machines are quite slow due to their design.
  • the known machines are not fully reliable in the sense that the insertion of a significant proportion of the artificial grass strands fails, and this leads to wastage.
  • the invention provides a device for inserting artificial grass strand parts in the ground, the device comprising:
  • the drum is configured to rotate the series of artificial grass strand parts to below the insertion device, wherein the insertion device is configured to insert the artificial grass strand parts which have been rotated to below the insertion device into the ground.
  • the rotating motion of the artificial grass strand parts allows a faster and more reliable insertion operation of the artificial grass strand parts.
  • This rotating motion stands in contrast to said machine by Desso which has been brought into use, wherein the clamps with which the artificial grass strands are brought below the insertion device perform a reciprocating motion.
  • the strand In the machine which has been brought into use by Desso, the strand must be gripped afresh each time. This is because, after inserting a strand, the clamp must be moved again to a free end of a new strand to be inserted in order to grip this and pull it out to below the insertion mechanism. This is carried out with a reciprocating motion. It has been found in practice that the gripping is not truly reliable. Gripping fails in up to 5% of cases, whereby fewer strands are inserted than is intended. This cannot simply be corrected because a large number of strands (for example 80) are inserted next to each other at the same time. It is not feasible to re-insert later in the 5% open sites.
  • the artificial grass strand to be inserted is held continuously via the rotating drum during the movement to below the insertion device. There is no need to grip a front end of the artificial grass strand again each time with the associated unreliability.
  • a single strand is wound in a helical pattern around a drum. Then the single strand is cut into a plurality of strand parts by a knife. Then the strands are inserted in the ground by an insertion device. This is a very slow method because the single strand must be wound around the drum a very large number of times. This takes a very long time.
  • An advantage of the present invention in relation to the machine according to EP1384817 is that a hybrid grass pitch can be created more quickly. Because a plurality of strands are wound around a drum at the same time, work can proceed much more quickly. The cycle time is hence significantly shorter.
  • the device performs a cycle, wherein the cycle comprises a rotation period and a stationary period, wherein:
  • the drum has 4, 5, 6, 7 or 8 clamps. It has been found that these are practical numbers.
  • the clamps are placed at mutual intervals of 30 to 50 cm apart, in particular 35-45 cm apart, more particularly at intervals of 38-42 cm apart.
  • an artificial grass strand part is held firmly by the front and rear clamp, viewed in the rotation direction, and the front clamp (viewed in the rotation direction) is moved underneath the insertion device due to the rotation of the drum.
  • the insertion pins of the insertion device make contact with the artificial grass strands to be inserted on the underside of the drum.
  • the distances L 1 are equal to each other and in side view define the angles of a regular polygon.
  • the insertion pins are located in the drum. This results in a compact machine.
  • the drum is configured to keep a stock of at least one series of cut artificial grass strand parts. It has been found, surprisingly, that this benefits the general reliability of the process.
  • strand guides are positioned between the clamps, wherein the strand guides are mounted on the drum and rotate with the drum.
  • the strand guides ensure a fixed position of the artificial grass strands.
  • the cutting device is mounted in a stationary manner on the frame and is configured to cut through the series of artificial grass strands.
  • the artificial grass strands are positioned in a row next to each other and rotate with the drum.
  • each clamp is configured to hold at least 50 artificial grass strands, and for this the clamp has at least the same number of clamp shoes.
  • a drum inlet where the artificial grass strands are supplied to the drum is on the top half of the drum, more particularly at an angle ⁇ 1 of 120-270 degrees from the lowest point of the drum. In this way, viewed in side view, the steps of clamping, cutting and insertion have a practical position.
  • the cutting device is located along the periphery between the location where the artificial grass strands are clamped and the location where the artificial grass strands are inserted.
  • each clamp is configured to hold at least 50 artificial grass strands, more particularly at least 80 artificial grass strands.
  • each clamp defines at least 50 parallel tracks, more particularly at least 80 parallel tracks, wherein the tracks lie next to each other and are separated from each other, wherein an artificial grass strand is guided into each track and wherein the clamp for each track comprises a clamp shoe for clamping the artificial grass strand in the track.
  • each clamp comprises a series of front shoes and a series of rear shoes, in particular one front shoe and one rear shoe for each of the at least fifty tracks, wherein a gap is defined between the front shoes and the rear shoes, wherein the cutting device is configured to make a cut through the artificial grass strands in the gap so that the front shoes hold the rear ends of the cut artificial grass strand parts and the rear shoes hold the front ends of the artificial grass strands.
  • the cutting device is configured to cut through the artificial grass strands in the stationary period.
  • the clamps are pre-tensioned by means of a spring force element, wherein the artificial grass strands are automatically clamped when placed in the clamp without further action being required for this, and wherein the device comprises a clamp actuator which deactivates the two clamps, which hold the artificial grass strand part to be inserted below the insertion device, prior to insertion of the artificial grass strand parts by the insertion device.
  • the clamp actuators are arranged in a stationary manner and mounted on the frame, in particular next to the drum.
  • the device comprises a front drum and a rear drum which are placed behind each other in order to be able to work with two drums simultaneously.
  • the device comprises wheels, tracks or skid elements to be able to move forward over the ground, or the device has a connector for attachment to a travelling vehicle, in particular a tractor, to be able to move the device over the ground.
  • the device has a central driving part, wherein the front drum is positioned in front of the central driving part and the rear drum behind the central travelling part.
  • the device has two groups of spools, a front group which is associated with the front drum and a rear group associated with the rear drum.
  • the device comprises a presser element and a presser actuator, wherein the artificial grass strands are guided below the presser element, wherein the presser element has through-holes through which the insertion pins are inserted in the ground, and wherein in the stationary period, the presser actuator presses the presser element onto the ground and thus prevents a sideways movement of the artificial grass strands.
  • the presser element defines grooves for the artificial grass strand parts so that the artificial grass strand parts can slide relative to the presser element, and wherein each through hole for an insertion pin opens into a groove.
  • the clamped artificial grass strand parts are rotated successively below the insertion device.
  • the clamps perform a rotating motion around the insertion device. In an embodiment, the clamps do not perform a reciprocating motion.
  • the underside of the drum is at a distance of 5-30 cm, in particular at a distance of 10-20 cm above the ground.
  • the drum has a diameter which is between 60 cm and 150 cm.
  • the rotation axis of the drum lies substantially perpendicular to the movement direction.
  • the cutting device is positioned at a distance from the insertion device which is greater than the distance between two successive clamps, so that the artificial grass strands are cut before they are positioned below the insertion device.
  • the device has a cycle time of less than 8 seconds, in particular less than 6 seconds.
  • a distance between the front drum and the rear drum can be adjusted by adjustment means.
  • the present invention also relates to a method for inserting artificial grass strand parts in a ground, the method comprising:
  • the method offers the same advantages as the device according to the invention.
  • the artificial grass strand parts are inserted in the ground folded in half, wherein an insertion depth is 15-20 cm and a length (L 1 ) of the artificial grass tufts above the ground is 1-4 cm.
  • the clamps are first brought to a loose state by means of a clamp actuator prior to insertion of the insertion pins, so that the series of artificial grass parts which is in the insertion position is no longer clamped by the clamps.
  • the artificial grass strands are cut before they are positioned below the insertion device.
  • the artificial grass strands are cut during the stationary period.
  • the drum rotates with the bottom part against the transport direction of the drum.
  • FIG. 1 shows a side view of an embodiment of the device according to the invention.
  • FIG. 2 shows an isometric view of an embodiment of an injection part of the device according to the invention.
  • FIG. 3 shows a view obliquely from below of an injection part of an embodiment of the device according to the invention.
  • FIG. 4 shows a side view of an embodiment of the drum and the cutting device.
  • FIG. 5 shows an isometric view of an embodiment of the drum and the cutting device.
  • FIG. 6 shows a top view of an embodiment of the drum and the cutting device.
  • FIGS. 7, 8, 9 and 10 show side views of an embodiment of the drum in the various stages during the method according to the invention.
  • the device 10 for inserting artificial grass strand parts in the ground comprises a frame 12 which is configured to support the various components of the device.
  • the device has tracks 20 and the drive 22 to be able to move the device over the ground 11 .
  • the device may also be provided with wheels or a skid element to achieve the same goal.
  • the device may also be provided with a connector for attaching the device to the front or rear of another vehicle, for example a tractor.
  • the device has a central driving part 24 which contains the tracks and the drive.
  • the device has a front injection part 25 A and a rear injection part 25 B.
  • the device furthermore has a plurality of spools 14 with artificial grass strands wound thereon.
  • the device may have more than 50 spools, in particular 70 to 100 spools. A larger or smaller number of spools is also possible.
  • the device comprises two drums 16 (indicated in FIG. 1 with reference numerals 16 A, 16 B) which are mounted in a rotating manner on the frame 12 .
  • the drums 16 rotate about respective, substantially horizontal rotation axes 51 (shafts) (see FIG. 4 ).
  • the shafts are supported on two ends by the frame.
  • the axes are perpendicular to the direction of movement as indicated by arrow 18 .
  • the drums are configured to receive a plurality of artificial grass strands which are unwound from the spools 14 and to rotate these artificial grass strands with the movement of the drum.
  • the device has a front drum 16 A and a rear drum 16 B which are placed behind each other in order to be able to work with two drums simultaneously.
  • the front drum 16 A is placed in front of the central travelling part and the rear drum 16 B is placed behind the central travelling part.
  • the drums have a diameter between 60 cm and 150 cm.
  • the spools 14 are divided into two groups 26 A, 26 B, i.e. a front group 26 A which is associated with the front drum 16 A, and a rear group 26 B which is associated with the rear drum 16 B.
  • the spools are mounted rotatably on stands 28 which are attached to the frame.
  • the front injection part 25 A comprises the front drum 16 A and the front group of spools 26 A. These are mounted on a front frame part 30 A which is mounted on the central travelling part 24 via connectors 32 .
  • the rear injection part 25 B comprises the rear drum 16 B and the rear group of spools 26 B mounted on a rear frame part 30 B which is mounted on the central travelling part 24 via connectors 32 . Both connectors have an upper fixing point 34 and a lower fixing point 35 .
  • the front frame part 30 A comprises longitudinal members 41 , cross members 42 and an upwardly extending part 43 which supports the drum 16 A.
  • the frame part 30 A comprises further reinforcing members 44 .
  • the stands 28 and the spools 14 are not shown in these figures.
  • the injection part 25 A comprises a cutting device 36 A which is positioned near the drum 16 and the function of which will be explained later.
  • the injection part furthermore comprises a roller 45 .
  • This roller supports the frame.
  • the drum 16 A comprises a plurality of clamps 50 A, 50 B, 50 C, 50 E, 50 D and 50 F. In total there are six clamps on each drum 16 .
  • the clamps are generally indicated with reference numeral 50 .
  • the drum may also have a different number of clamps, for example 4, 5, 7 or 8 clamps.
  • the clamps are arranged around the rotation axis 51 .
  • the clamps rotate with the drum in the direction of arrow 52 .
  • the clamps 50 are placed at mutual intervals L 1 of 30-50 cm, in particular 35-45 cm apart, more particularly at a distance of 38-42 cm apart.
  • the distance L 1 determines the length of the cut artificial grass strand parts 62 .
  • the length of the artificial grass strand part 62 is still greater than L 1 , because the guides 58 ensure that the path followed by the artificial grass strand part is not a straight line between two clamps but is formed by three parts:
  • the parts 88 A, 88 B, 88 C are shown in FIG. 8 .
  • the clamps For each artificial grass strand 60 , the clamps hold an artificial grass strand part 62 clamped between a front clamp (in FIG. 4 , this is clamp 50 A) and a rear clamp (in FIG. 5 , this is clamp 50 B), viewed in the direction of rotation, and allow the artificial grass strand parts to rotate with the drum.
  • the injection part 30 A furthermore comprises a feed device for feeding the series of artificial grass strands from the spools to the drum.
  • the feed device cannot be seen in FIGS. 4, 5 and 6 .
  • the injection part 30 A furthermore comprises a cutting device 36 for cutting the artificial grass strands, so that the clamped artificial grass strand parts 62 are cut loose from the rest of the respective artificial grass strand 60 .
  • the cutting device 36 has four rotating driven knives 55 which move to and fro in the direction of arrow 56 during rotation.
  • the injection part 30 A furthermore comprises an insertion device 70 which comprises a plurality of insertion pins 72 and at least one actuator 74 , wherein the actuator 74 inserts the insertion pins 72 into the ground over a certain depth.
  • the drum 16 A is configured to rotate the series of artificial grass strand parts 62 to below the insertion device 70 .
  • the front clamp 50 A viewed in the direction of rotation—is moved underneath the insertion device.
  • the insertion device 70 is configured to press the artificial grass strand parts 62 , which are rotated to below the insertion device, into the ground.
  • the insertion pins 72 of the insertion device 70 make contact at the underside of the drum with the artificial grass strand parts to be inserted.
  • the insertion pins 72 are located in the drum and the drum 16 A rotates around the insertion pins.
  • the actuator 74 is outside the drum.
  • the insertion pins 72 may be provided with an inverted V-shape at their bottom end, in order to be able to grip the artificial grass strand parts firmly.
  • the drum is configured to tension at least two cut artificial grass strand parts 62 behind each other and bring these successively below the insertion device.
  • Strand guides 58 are positioned between the clamps 50 .
  • the strand guides 58 are mounted on the drum and rotate with the drum.
  • the cutting device 36 is mounted stationarily on the frame and is configured to cut the series of artificial grass strands.
  • each clamp 50 is configured to clamp firmly at least 50 artificial grass strands, and for this has at least as many clamping shoes 82 .
  • Each clamp 50 may be configured to clamp at least 80 artificial grass strands. This is shown clearly in FIG. 5 .
  • the clamping shoes 82 define grooves in which the artificial grass strands are placed.
  • the artificial grass strands 60 and also the cut parts 62 are stationary relative to the drum during rotation of the drum.
  • Each clamp defines at least 50 parallel tracks, and In an embodiment even at least 80 parallel tracks 83 .
  • the tracks lie next to each other and are separated from each other, wherein an artificial grass strand is fed into each track and wherein the clamp has a clamping shoe 82 for each track, for clamping the artificial grass strand in the track.
  • Each clamp 50 comprises a front shoe 51 A and a rear shoe 51 B, in particular a front shoe 51 A and a rear shoe 51 B for each of the at least fifty clamping shoes 82 , wherein a gap 57 is defined between the front shoes 51 A and the rear shoes 51 B.
  • the knives 55 of the cutting device are configured to make a cut through the artificial grass strands in the gap 57 , so that the front shoe 51 A holds a rear end of the cut artificial grass strand part 62 and the rear shoe holds a front end of the artificial grass strand 60 .
  • the clamps 50 are pre-tensioned by at least one spring force element 59 .
  • the clamps are connected together by a bar so that all clamps are activated and deactivated simultaneously.
  • the artificial grass strands 60 are automatically clamped when placed in the clamp, without any further action being required.
  • Each injection part of the device 10 has two clamp actuators 80 which deactivate the clamps 50 , which hold the artificial grass strand parts 62 to be inserted, prior to insertion of the artificial grass strand parts by the insertion device.
  • the clamp actuators 80 are arranged stationarily and are mounted on the frame, in particular next to the drum. It is however also possible to mount the clamp actuators 80 on the drum and allow them to rotate with the drum. In this case, for each clamp 50 , a clamp deactivation device 80 is provided.
  • the clamp actuators 80 are essentially deactivating actuators, i.e. they release the clamps 50 which are pre-tensioned by the spring device 59 , against the force of the pretension by the spring device 59 .
  • the clamp actuators 80 are preferably hydraulic.
  • the device has a presser element 84 and one or more presser actuators 86 (see also FIG. 2 ).
  • the artificial grass strands are guided below the presser element 84 .
  • the presser element 84 has a series of continuous holes 85 . Through these the insertion pins 72 are pressed into the ground. It is also possible that a number of through holes 85 are joined together into slots.
  • the artificial grass strand parts can slide relative to the presser element.
  • Each continuous hole 85 for an insertion pin opens at an artificial grass strand part during operation.
  • the underside of the drum is at a distance of 5-30 cm, in particular at a distance of 10-20 cm, above the ground.
  • the cutting device is situated at a distance L 2 from the insertion device 70 which is greater than the distance L 1 between two successive clamps, so that the artificial grass strands are cut through before they are positioned below the insertion device.
  • L 2 is here measured along the path which is defined by the clamps 50 and the guides 58 .
  • FIGS. 4, 7, 8, 9 and 10 the operation of the device 1 according to the invention is explained in more detail.
  • the figures show only one artificial grass strand 60 because the figures are side views, but the person skilled in the art will understand that this represents a series of artificial grass strands 60 .
  • the method for inserting artificial grass strand parts in the ground 11 comprises the following steps.
  • the device 10 is moved over the ground 11 to a location and the device is stopped at this location.
  • a series of artificial grass strands 60 is fed into the drum and clamped by a front clamp 50 A.
  • the drum rotates through a cycle angle ⁇ of 60 degrees to a next position, in which movement the front clamp 50 A draws the series of artificial grass strands off the spools.
  • the front clamp 50 A is in front of the cutting device 36 .
  • a following clamp 50 B grips the series of artificial grass strands. This is the situation shown in FIG. 4 .
  • the drum 16 then rotates again through a cycle angle of 60° to a next position.
  • the clamp 50 A is now obliquely below the insertion device 70 .
  • the clamp 50 B is in front of the cutting device.
  • a following clamp 50 C grips the artificial grass strands 60 and holds them firmly.
  • a second series of artificial grass strands 62 ′ is clamped.
  • the rotating knives 55 are moved in the direction of arrow 91 into the gap between the front shoe 51 A and the rear shoe 51 B of clamp 50 B. This takes place by actuators 92 (which are indicated in FIG. 2 ).
  • the knives 55 then cut through all artificial grass strands by moving forward and back along arrow 56 (see FIG. 5 ) during rotation.
  • the artificial grass strand parts 62 are now separate from the rest of the artificial grass strands 60 and are held by the rear shoe 51 B of clamp 50 A and the front shoe 51 A of clamp 50 B.
  • the presser element 84 (see FIG. 3 ) is then pressed against the ground so that the artificial grass strand parts cannot shift sideways.
  • the artificial grass strand parts 62 can however shift in their length direction relative to the presser device.
  • the insertion device 70 is then activated and the insertion pins 72 are pressed into the ground.
  • Each insertion pin carries with it an artificial grass strand part 62 .
  • the artificial grass strand parts 62 are folded in half during insertion, with a U bend at the bottom end.
  • the device 10 is moved over a cycle distance L 4 (see FIG. 1 ) to a following position on the hybrid grass surface to be created, and stopped there.
  • the cycle distance L 4 over which the device is moved is of the order of 2-6 cm, i.e. relatively small. Other distances may also be chosen.
  • the mutual spacing L 3 (see FIG. 1 ) between the two drums 16 A, 16 B can be set by means of actuators 200 or other adjustment means. In practice, it has proved useful to allow the front and rear drum to insert strands out of phase.
  • the rear drum 16 B inserts its strands in the middle between two successive rows inserted by the front drum 16 A.
  • the front drum for example inserts strands every 4 cm, and the rear drum inserts precisely in-between so that the overall insertion gap is 2 cm.
  • the distance L 3 is fixed and is a multiple of the cycle distance L 4 , whereby it is difficult or impossible to work continuously.
  • the rear drum would insert strands at precisely the same point as the front drum. This is prevented by only allowing the machine to rotate over a distance L 3 , and then to advance the machine without insertion over a distance L 3 . Then it may again insert strands after a distance L 3 . This pattern may be repeated. It is however an awkward way of inserting strands.
  • the drum 16 is rotated through a cycle angle to a following position.
  • the rotation of the drum and the travelling to a new position may take place simultaneously for faster working.
  • the series of artificial grass strand parts is positioned in the insertion position below the insertion device by the rotation of the drum. A new series of artificial grass strand parts is clamped.
  • the artificial grass strand parts 62 are typically inserted in the ground over a distance of 18 cm and protrude 2 cm above the ground. Because the artificial grass strand parts 62 are folded in half, the total length required for each artificial grass strand part is 40 cm. Thus the mutual spacing, measured along the path followed by the artificial grass strands, between the clamps 50 A, 50 B, 50 C, 50 D, 50 E and 50 F is 30-50 cm, in particular 35-45 cm, more particularly 38-42 cm.
  • the insertion depth H 1 may to some extent be varied, i.e. may amount to 15-20 cm, and a length (L 1 ) of the artificial grass tufts above the ground may be between 1-4 cm.
  • the device performs a cycle, wherein the cycle comprises a rotation period and stationary period wherein:
  • the clamps 50 perform a rotating movement around the insertion device.
  • the clamps do not perform any reciprocating movement as in the machine according to the prior art.
  • the artificial grass strands are cut before they are positioned below the insertion device. This too is different from the prior art, where the artificial grass strand parts are first brought below the insertion device and only then cut through.
  • the rear drum 16 B rotates with the bottom part against the transport direction of the device 10 .
  • the front drum 16 A rotates with the bottom part with the transport direction 18 of the device 10 .
  • the device may have a cycle time of less than 8 seconds, in particular less than 6 seconds.
  • the clamps define at least 50 parallel tracks, in particular more than 70 parallel tracks, even more particularly more than 80 parallel tracks, and the same number of pins.
  • the tracks are separate from each other. This is different from the machine according to EP1384817 where a drum defines a helical pattern.
  • the strand In EP1384817, the strand must first be arranged over the entire helix, which takes a long time.
  • at least 50 strands can be arranged in the tracks simultaneously.
  • the artificial grass strands 60 usually comprise several fibers, in particular 5 to 8 fibers, more particularly 5 to 6 fibers.
US16/176,092 2015-01-26 1919-10-31 Device for Inserting Artificial Grass Strands into the Ground Abandoned US20190127926A1 (en)

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Application Number Priority Date Filing Date Title
US16/176,092 US20190127926A1 (en) 2015-01-26 1919-10-31 Device for Inserting Artificial Grass Strands into the Ground

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US16/176,092 US20190127926A1 (en) 2015-01-26 1919-10-31 Device for Inserting Artificial Grass Strands into the Ground
NL2014189A NL2014189B1 (nl) 2015-01-26 2015-01-26 Inrichting voor het in de grond aanbrengen van kunstgrassprieten.
NL2014189 2015-01-26
US14/842,354 US9683335B2 (en) 2015-01-26 2015-09-01 Device for inserting artificial grass strands into the ground
US15/600,246 US10151070B2 (en) 2015-01-26 2017-05-19 Device for inserting artificial grass strands into the ground

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US20190127926A1 true US20190127926A1 (en) 2019-05-02

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US16/176,092 Abandoned US20190127926A1 (en) 2015-01-26 1919-10-31 Device for Inserting Artificial Grass Strands into the Ground
US14/842,354 Active 2035-12-15 US9683335B2 (en) 2015-01-26 2015-09-01 Device for inserting artificial grass strands into the ground
US15/600,246 Active US10151070B2 (en) 2015-01-26 2017-05-19 Device for inserting artificial grass strands into the ground

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US14/842,354 Active 2035-12-15 US9683335B2 (en) 2015-01-26 2015-09-01 Device for inserting artificial grass strands into the ground
US15/600,246 Active US10151070B2 (en) 2015-01-26 2017-05-19 Device for inserting artificial grass strands into the ground

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US (3) US20190127926A1 (de)
EP (2) EP3029199B1 (de)
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