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EP0279570A1 - Verfahren zur Herstellung von Sport- und Spielplatzbelägen - Google Patents

Verfahren zur Herstellung von Sport- und Spielplatzbelägen Download PDF

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Publication number
EP0279570A1
EP0279570A1 EP88301003A EP88301003A EP0279570A1 EP 0279570 A1 EP0279570 A1 EP 0279570A1 EP 88301003 A EP88301003 A EP 88301003A EP 88301003 A EP88301003 A EP 88301003A EP 0279570 A1 EP0279570 A1 EP 0279570A1
Authority
EP
European Patent Office
Prior art keywords
frame
surfacing
court
wheels
boundary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88301003A
Other languages
English (en)
French (fr)
Other versions
EP0279570B1 (de
Inventor
Jack H. Wilson
Willis G. Dykes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ISPO GmbH
Original Assignee
Koter Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/010,936 external-priority patent/US4789265A/en
Application filed by Koter Industries Inc filed Critical Koter Industries Inc
Priority to AT88301003T priority Critical patent/ATE99369T1/de
Publication of EP0279570A1 publication Critical patent/EP0279570A1/de
Application granted granted Critical
Publication of EP0279570B1 publication Critical patent/EP0279570B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • 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
    • E01C11/00—Details of pavings
    • E01C11/005—Methods or materials for repairing pavings
    • 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
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/16—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries

Definitions

  • This invention relates to the repair and maintenance of recreational areas such as indoor or outdoor, hard recreational surfaces and particularly, to the resurfacing of tennis courts, basketball courts and the like.
  • acrylic resurfacing material typically employed for tennis courts has been applied manually and thereafter spread about by a number of individuals working with hand­held, squeegee-like spreaders, typically 76 cm in width.
  • the resulting surface coating often varies in thickness and exhibits unsightly streaks resulting from uneven application and multi-directional spreading techniques.
  • the thickness of the surface coating can vary and, as a result, often shows noticeable deterioration even within one year after resurfacing.
  • the present invention relates to a method of applying a surface and a device which can spread and smooth, say resurfacing material, uniformly over an entire court surface in a single pass. This method takes a fraction of the time required by conventional manual application techniques.
  • the present invention not only permits significantly more rapid resurfacing, but also provides a far superior uniformity of thickness throughout the resurfaced area.
  • the invention provides a method of surfacing a recreational area such as a tennis court or the like, the area being defined by outer length and width boundaries with a surfacing material characterised by the steps of: (a) providing a mobile surfacing device, the device comprising frame means and support means flexibly connected to the frame means, the support means extending a length corresponding to at least one outer boundary of the area, spreading and smoothing means depending from the support means; (b) locating the device outside and parallel to the one boundary; (c) applying a mass of surfacing material to the area in advance of the device, and (d) moving the device in one pass across the area in a first direction from that boundary to the opposed boundary to cause the smoothing and spreading means to spread and smooth the material uniformly across the area.
  • a method for resurfacing a plurality of side-by-side court surfaces characterised by the further steps of: (e) moving the surfacing device in a second path transverse to the first direction to a position adjacent a width boundary of a second of the plurality of court surfaces; (f) applying additional surfacing material to at least a portion of the second of the court surfaces; and (g) moving the surfacing device in a third path parallel to the first direction a distance exceeding the length of the second court surface to smooth and spread the surfacing material over at least the entire area of the second court surface.
  • the spreading means is located in advance, of the smoothing means so that movement of the device across the area causes the mass to be first spread and then smoothed and the device is movable on wheels and further smoothing means are located rearwardly of the wheels to smooth out any wheel marks.
  • the device has castors and means are present for raising the wheels so that the device may be moved to the width boundary and then lowered for movement along the path.
  • the invention also provides apparatus for use in applying surface material to a recreational area comprising drive means and a frame means and wheel means characterised in that the support means are flexibly, supportive on the frame means and in that spreading and smoothing means depend from the support means.
  • the apparatus is preferably characterised by self-contained, selectively engageable drive means for effecting movement of the frame means, the drive means being adapted for movement between disengaged, neutral and traction positions; and free floating flexible blade means mounted on and extending along a front face of the frame, and free floating brush means mounted adjacent and parallel to the blade means, the flexible blade and brush means being adapted to engage a mass of resurfacing material applied to a surface and to spread and smooth the material as the frame means transverses the surface.
  • the invention yet further provides a surfacing apparatus for uniformly spreading material across a surface comprising; a frame including a front face and a rear face; characterised by a leading material applicator extending from the front face and including a leading squeegee-type blade means and trailing brush means; and a trailing material applicator extending from the rear face and including at least one leading brush means, the leading and trailing applicators being mounted for free floating pivotal motion relative to the frame.
  • the device comprises an elongate frame preferably constructed in three seperable but substantially axially aligned sections and supported on a plurality of freely rotatable castors.
  • the total width of the three-section frames may be varied as desired, but preferably exceeds the width of a regulation size tennis court. Other sizes may be achieved by shortening or lengthening any or all of the frame sections, and/or by removing altogether the separable side sections, depending on the size of the surface to be refinished.
  • the centre frame section is approximately 6 metres wide, and each side or wing section is approximately 5.8 metres wide.
  • An engine or motor e.g. of internal combustion type, is used to drive the device.
  • the engine is preferably mounted on the centre section of the frame along with a centrifugal clutch, a forward-neutral-reverse transmission, and a roller drive train to a live drive axle mounting a pair of drive wheels.
  • the ends of the live drive axle are supported for pivotal movement between an operative positive ground-­engaging position, a neutral position, and an inopertive position in which both drive wheels are raised above the ground.
  • a unique torsional shaft arrangement allows about 80% of the weight of the centre section of the frame to be directed onto the drive wheels for increased traction in the operating position. Rotation of the torsional shaft to raise or lower the drive wheels is accomplished by a hand crank manually actuated by the machine operator.
  • the resurfacing apparatus of this invention may also be steered by actuating one or the other of two upstanding levers, located on either side of a driver's seat mounted substantially in the middle of the centre section.
  • Each lever is operatively connected to a respective drive wheel.
  • the right lever By rotating, for example, the right lever, the right drive wheel is lifted clear off the ground, thereby losing its traction.
  • the left drive wheel maintains its positive ground engagement and produces full traction so as to pull the left end of the unit ahead of the right end.
  • actuating the right or left steering lever produces a braking action on the right or left end, respectively, of the unit, thereby permitting the unit to be steered as desired.
  • the above described torsional shaft also permits the steering levers to act independently of one another, and without negative impact on the mechanism employed to raise and lower the drive wheels between operative and inoperative positions.
  • the two side frame sections which are substantially identical, are releasably attached to the centre frame section for ease of transport and/or storage.
  • the side sections are passive in the sense that they contain no portion of the drive train or steering systems of the unit.
  • Extending along front and rear faces of the unit are a plurality of channel members, each of which includes web and flange portions. Three such channel members are pivotally mounted to the three respective frame sections along both the front and rear faces of the unit. Thus, in one preferred embodiment, a total of six such channel members are employed.
  • the channel members along the front and rear of the machine, respectively, are in substantial axial alignment, and at the same time, are mounted substantially independently of each other such that all of the channel members are free to float relative to the frame sections to which they are attached.
  • Front and rear flanges of the channel members extending across the front face of the unit support leading squeegee-­type blades and trailing bristle brushes, respecitively.
  • aligned channel members each mount leading and trailing bristle brushes.
  • leading indicates that the so-­described component contacts the resurfacing material ahead of the "trailing” component.
  • the channels which extend along the front of the machine, and their associated squeegee-type blades and brushes, will be referred to as the “lead” or “leading” applicator, while the channel members which extend across the rear face of the unit, and their respective bristle brushes will be referred to as the “rear” or “trailing” applicator.
  • the above described arrangement is such that the leading squeegee-type blade of the lead applicator contacts the resurfacing material first, and pushes the majority of the material ahead of the machine, but allowing a limited quantity to flow underneath the blade.
  • the trailing bristle brush of the lead applicator serves to further thin out and smooth the resurfacing material.
  • leading and trailing brushes of the trailing applicator serve to even further spread and thin out the resurfacing material and, significantly, they function to eliminate tracks formed in the wetted surface by the drive wheels and castors, and create a finished texture in the acrylic material.
  • additional brushes are provided along the lead brush of the rear applicator to cover similar gaps.
  • each of the channel members may be rotated upwardly away from the ground, and latched in an inoperative position to further facilitate transport and/or storage of the device.
  • this invention relates to an improved process for resurfacing a tennis court or other recreational court surface which is marked by boundaries, typically in the form of painted lines.
  • boundaries typically in the form of painted lines.
  • the process of this invention may be carried out as follows: (a) covering existing court boundaries with strips of material, preferably adhesive-type tape which will not remove the paint when it is pulled up after the resurfacing operation; (b) positioning a resurfacing device as described above adjacent, but outside the boundaries of the court, and preferably parallel to one of the end line, or width boundaries; (c) applying resurfacing material, preferably as sand-filled acrylic material of predetermined viscosity, in front of the device, preferably along its entire width; (d) moving the device forwardly along at least and preferably beyond the entire length and width of the court, spreading out and smoothing the resurfacing material by the leading and trailing applicators; and (e) removing the strips of tape to expose the original boundary lines.
  • resurfacing material preferably as sand-filled acrylic material of predetermined viscosity
  • the machine may be positioned to travel in a direction transverse to the court length. This is particularly advantageous when resurfacing a number of adjacent courts, since all of the courts may be completely resurfaced in two passes of the machine. In other words, in one pass, one half of all of the courts (and areas adjacent the end lines on one side) may be resurfaced as the machine travels in one direction, and the other half of all of the courts (and areas adjacent the end lines on the other side) may be resurfaced as the machine returns in an opposite direction.
  • more than one coat may be applied as desired.
  • a particularly attractive texture may be created by applying the second coat in a direction substantially perpendicular to the first. This procedure creates a striking "linen-like" texture to the court, created by the brushes on the trailing applicator.
  • a typical multiple court configuration 1 includes a pair of side-by-side tennis courts 2, 3.
  • Court 2 is defined by lengthwise boundary lines 4, 5 and widthwise boundary lines 6, 7.
  • court 3 is defined by lengthwise boundary lines 8, 9 and widthwise boundary lines 10, 11.
  • tennis courts are divided in half by lines 12, 13 which coincide with the location of nets (not shown).
  • Court 2 is divided longitudinally by line 14 to define service areas while court 3 is similarly divided by line 15.
  • lines 4, 5, 8 and 9 are considered the outer boundary lines typically employed in doubles matches. In other words, for alignment purposes, it is the outermost court boundaries that are significant, and other, interior lines, such as singles match boundaries and service lines are not shown.
  • FIGURE 1 also illustrates, generally, a resurfacing machine 30 positioned in surface area 16 outside the boundaries of court 2, and in generally parallel alignment with the widthwise boundary line 6.
  • the device 30 comprises, essentially, an elongated structural frame including a center section 31 and separable left and right side sections 32, 33, respectively.
  • the center section is constructed in the form of a substantially rectangular box-like frame constructed, preferably, of welded 2" x 2" 16 gauge tubular steel including horizontal, upper front and rear beams 34, 35, and horizontal lower front and rear beams 36, 37, connected by a plurality of vertical front and rear connector beams 38, 39.
  • a plurality of upper and lower, horizontal connector beams 40, 41 extend between the front and rear faces 40 ⁇ and 41 ⁇ , respectively, of the device.
  • Each side section is formed by a substantially planar, horizontal frame section which, in effect, forms an extension of the lower portion of the center frame section.
  • each side section includes lower front and rear beams 36 ⁇ , 37 ⁇ respectively, connected by horizontal, front-to-rear connector beams 41 ⁇ .
  • the center section also mounts an operator's chair, or seat, 42 on a seat post 43 which, in turn, is supported by a cross brace 44 which extends between upper front and rear beams 34, 35, respectively.
  • a platform 45 which supports a motor 35 ⁇ , as well as a conventional centrifugal clutch and transmission device (including forward, neutral and reverse gears) 46 provided with an operating shift lever 47.
  • the motor M which drives the unit, is preferably a 5 HP gasoline powered internal combustion engine.
  • the clutch mechanism includes an input shaft 48 to which a pulley 49 is attached.
  • a drive belt 50 connects the clutch to the motor 35 ⁇ by way of motor output shaft 51 and attached pulley 52.
  • pulleys 49 and 52 are mounted for rotation about vertical axes, and are located just below the platform 45.
  • the shift lever 47 extends upwardly from the clutch to a position adjacent and convenient to the operator from seat 42.
  • a horizontally oriented clutch output shaft 53 mounts a sprocket 54 which is operatively connected by an endless chain 55 to an idler gear 56.
  • the idler 56, and an associated small sprocket 57 are mounted on a shaft 63 for rotation relative to the shaft.
  • Sprocket 57 is operatively connected to a final drive sprocket 58 via endless chain 59.
  • Sprocket 58 is mounted for rotation on a live drive axle shaft 60, approximately midway along the length of the axle.
  • the drive wheels are preferably 10.5 inches in diameter and are spaced approximately 18 feet apart, so that the wheels are located approximately 1 foot inwardly of the outer ends of the frame center section 31.
  • the above described drive train effects an overall 115:1 reduction between the motor output shaft and the drive axle.
  • the live axle 60 is supported at its ends by outboard bearings (not shown) associated with a pair of end plates 62, 62 which pivotally mount the drive axle 60 and drive wheels 61, 61 to the frame via a rotatable torsion shaft 63, which extends along substantially the length of the center section 31, substantially parallel to the drive axle 60.
  • Shaft 63 is supported by a plurality of bearing blocks 64 mounted on the front-to-rear lower connector beams 41.
  • Shaft 63 which is preferably on the order of 1 inch in diameter, acts as a torsional spring which is rotatable about ⁇ 25° from a neutral position.
  • the neutral position is defined as that in which drive wheels 61, 61 are in light contact with a flat ground surface.
  • rotation of shaft 63 25° in a counterclockwise direction (as viewed in FIGURE 7) from the neutral position results in the drive wheels being lifted off the ground approximately 21 ⁇ 2 inches, to an inoperative position illustrated in FIGURE 8.
  • Rotation of shaft 63 25° in a clockwise direction from the neutral position results in a positive application of about 80% of the weight of the center section onto the drive wheels to enhance the traction of the unit.
  • rotation of the torsional spring shaft 63 is accomplished by a manually operated screw jack 70 which actuates a toggle linkage 71, 72, via an attached thrust nut 73, operating between a fixed frame mount 74 and a crank 75 fixedly mounted for rotation with shaft 63, approximately midway along the length of the shaft.
  • the screw jack 70 is also attached to a vertically oriented frame member 76 via a collar 77 and a pair of lock nuts 78.
  • a handle 79 is provided to effect rotation of the screw jack causing the threaded thrust nut 73 to move axially therealong.
  • An adjustable stop 80 is threadably mounted on the screw jack to limit movement of the thrust nut 73 toward the handle 79, and thus limit the extent of counterclockwise movement of the crank 75 (as viewed in FIGURE 5).
  • the toggle linkage 71, 72 will cause crank 75 to rotate shaft 63 in a clockwise or counterclockwise direction to raise or lower the drive wheels as previously described.
  • the device may be steered by the operator with the aid of a pair of steering levers 81, 81 extending substantially vertically on either side of the operator chair 42.
  • Each steering lever is connected to a respective steering shaft 82 which, in turn, is connected to an associated end plate 62 by a crank arm 83 fixed to the shaft and a push-pull rod 84, which may be in the form of an adjustable turnbuckle device.
  • the steering action produced by actuation of one or the other of the levers 81, 81 is made possible by the mechanical properties of the live axle shaft 60 and the torsion spring shaft 63.
  • the drive axle 60 is designed with high torsional stiffness and low bending stiffness.
  • the torsion spring shaft 63 is designed with low torsional stiffness.
  • shaft 63 is able to absorb the torsional or twisting forces applied when the steering levers are actuated, with only minimal stress on the screw jack mechanism 70.
  • the lower bending stiffness of the live axle 60 permits one drive wheel to be lifted off the ground while the other wheel maintains its full tractional engagement.
  • the high torsional stiffness of the drive axle is desirable for reasons associated with the spreading of the coating material by the squeegee and brush arrangement described in detail hereinbelow.
  • the frictional resistance of pushing the squeegee and brush arrangement of the lead applicator, and simultaneously pulling the brushes of the trailing applicator across a concrete surface has a static value of about 600-650 lbs., and a dynamic value of about 400-450 lbs. Under normal conditions, this force is fairly evenly distributed along the approximate 58 ⁇ width of the unit, and the tractive requirement for each drive wheel 61 is approximately equal. However, when one side of the unit experiences more drag, the drive wheel on that side must apply an increased tractive force in order for the unit to maintain straight line movement. If the live drive axle 60 were not stiff in torsion, this increased torque demand would allow this wheel to be torsionally deflected behind the other wheel, causing the unit to stray off course. The torsionally stiff drive axle minimizes this tendency.
  • the entire unit i.e., all three frame sections, is supported on a plurality of 360° swivel casters 86 which allow the unit to be pushed or pulled in any direction when the drive wheels 61 are in a disengaged, or inoperative position.
  • a plurality of 360° swivel casters 86 which allow the unit to be pushed or pulled in any direction when the drive wheels 61 are in a disengaged, or inoperative position.
  • two pair of casters 86 located at either end of the center section 31, as well as two pair of casters supporting each side section 32 and 33, remain in ground engaging contact at all times, with the exception explained further hereinbelow relating to the use of one or more transport dollies.
  • casters 87, 87 are mounted intermediate the ends of the center section 31, as best seen in FIGURE 4. These casters are mounted adjacent the drive sprocket 58 and, under normal circumstances, do not touch the ground.
  • casters 86 preferably have a diameter of six inches, while casters 87 preferably have a diameter of five inches.
  • the purpose of casters 87 is to prevent the drive sprocket 58, which has a ground clearance of about 1 inch, from dragging on high spots as the unit is transported, or is in operation over an uneven surface.
  • the weight of the center section 31 is carried only on the two pair of end casters 86, and the surface is relatively flat, then the weight of the center section is evenly distributed to each pair of the end casters. If, on the other hand, casters 87 were also a full six inches in diameter, and if they were to engage a high spot, casters 87 would then support most of the weight of the center section and cause unsightly and unacceptable grooves to be formed in soft asphalt court surfaces.
  • lower front beams 36 and 36 ⁇ of frame sections 31, 32 and 33 pivotally mount a respective channel member 90, 91 and 92.
  • the channel members like the frame sections, are in substantial axial alignment, so as to define substantially continuous surfaces from one end to the other.
  • channel members 90 ⁇ , 91 ⁇ and 92 ⁇ are pivotally supported on beams 37, 37 ⁇ of the center and side frame sections, respectively, along the rear face 41 ⁇ .
  • channel member 90 is pivotally mounted to a plurality of outwardly extending pivot arms 93, via angle brackets 94 and pivot pins 95.
  • Each arm 93 is, in turn, pivotally mounted between a pair of bracket plates 96 by a pivot pin, or bolt 97.
  • the plates are welded to a common base plate 98 which attached to a lower front beam 36 by a pair of U-bolts 99. The arrangement is such that channel member 90 is freely floatable relative to the center frame section.
  • Each of the remaining channel members 91, 92, 90 ⁇ , 91 ⁇ and 92 ⁇ are similarly mounted to respective frame sections along the front and rear faces of the device. While the mounting arrangement of the three channel sections along each of the front and rear of the unit is similar, the smoothing and spreading devices attached to the front or forward channel members which define the lead applicator, are arranged differently than those on the rear channel members which define the rear applicator as further described below.
  • each of the axially aligned forward channels 90, 91 and 92 mount a dual configuration of resurfacing material spreading and smoothing devices including a leading squeegee-type flexible blade and a trailing bristle brush in an substantially continuous arrangement across the front face of the unit. Since each of the squeegee/brush arrangements supported on the forward channels 90, 91 and 92 are identical, only the center section channel 90 will be described in detail.
  • the channel member 90 includes a forward flange 110 and a trailing flange 111.
  • the forward flange supports a flexible, squeegee-type blade 112, while the trailing flange supports a bristle brush 113.
  • Fasteners 114 which may be bolts, screws, rivets or the like, are used to attach the blade and brush to the channel flanges.
  • the squeegee-type blade 112 is preferably a .025 inch thick, 60 Durometer NeopreneTM material, preferably about 4 inches in length, i.e., top to bottom. It will be understood, of course, that other suitable materials may be employed in the blade construction.
  • Brush 113 is preferably a polypropylene composition, with individual bristles being about .022 inches in diameter and about 4.50 inches in length.
  • other suitable material may be sued in forming the brush.
  • each gap seal device includes an angle bracket 116, a mounting arm 117 welded or otherwise attached to the bracket, and which is provided at one end with an axial slot 118.
  • the angle bracket 116 supports, by bolts, rivets or other suitable fasteners 114, a squeegee-type blade 119 which overlaps adjacent blades 112 of adjacent channel members.
  • the gap seal blade 119 is preferably about .062 inches thick and about 4.50 inches in length (top to bottom). This thinner, and slightly longer blade curls under the main blade sections 112 during resurfacing to assure a smooth, continuous surface during spreading of the acrylic or other resurfacing material.
  • the gap seal devices 115 are mounted at either end of the center channel member 90 by means of suitable fasteners such as wing nuts 120.
  • the slots 118 permit adjustment of the gap seal devices relative to the channel and main blade.
  • Rearward center channel member 90 ⁇ is provided with a leading flange 121 and a trailing flange 122.
  • Flange 121 supports a leading bristle brush 123 while flange 122 supports a trailing bristle brush 124.
  • the brushes are fastened to the respective flanges by suitable fasteners 125 which may be bolts, rivets or the like.
  • gap brush devices 126 are provided, one of which is illustrated in FIGURE 12.
  • the gap brush device 126 is similar to the gap blade device 115 insofar as it includes an angle bracket 127 attached to a mounting arm 128 provided with an adjustment slot 129.
  • the angle bracket supports a gap seal brush 130 similar to main brushes 123, 124. Unlike the blade gap devices, however, brushes 130 are not designed to curl underneath the main brush sections 123, 124.
  • an alternative gap brush device 131 wherein a brush 132 is supported from an angle bracket 133.
  • a pair of mounting arms 134 are pivotally mounted at first ends to channel bracket 135 via a pivot pin 136, which passes through a sleeve 136 ⁇ welded or otherwise fixed to the angle bracket 133, and pivotally mounted at its second ends to the angle bracket 133 via pivot pin 137 which passes through a second sleeve 137 ⁇ welded or otherwise fixed to the channel bracket 135.
  • the gap brush is able to float by reason of its double pivot connection relative to the channel member 90.
  • Bracket 135 is also slidably adjustable along the channel to enable accurate placement of the brush.
  • the brush 132 is tapered at 132 ⁇ on either side in directions transverse to the normal direction of movement of the brush, indicated by the arrow 190.
  • the device includes an angle bracket 139, a bristle brush 140, a pair of mounting arms 141 and a channel bracket 142.
  • the arms 141 are pivotally mounted at first ends to the channel bracket 142 via pivot pin 143, which passes through a sleeve 143 ⁇ welded or otherwise fixed to the angle bracket 139, and at second ends to the angle bracket 139 via pivot pin 144 which passes through a sleeve 144 ⁇ welded or otherwise fixed to the channel bracket 142.
  • the double pivot arrangement allows the end brushes to float relative to their respective channel members in the same manner as the brush gap devices.
  • a pair of end brushes will be used, extending substantially perpendicularly outwardly from the forward face of the unit, and specifically from the ends of side channel members 91 and 92.
  • the end brushes are also adjustable along the length of the respective channel members according to the width of the area to be resurfaced, and are designed to keep the initially applied resurfacing material within the court boundaries. These are particularly advantageous in two-tone resurfacing where the "in-bounds" portion of the court is one color, and the "out of bounds" portion is another color.
  • each is provided with a relatively stiff, curved foot 145, constructed, for example, of steel bar stock.
  • the forward and rearward channels 90,91, 92, 90 ⁇ , 91 ⁇ and 92 ⁇ are free to float relative to the frame sections.
  • the channel members are designed to provide good stiffness in the horizontal direction to counter the frictional resistance of the squeegee-type blades and brushes as they are pushed or pulled across the surface.
  • the channel members are designed to have less stiffness in the vertical direction, allowing them to "sag” along their respective lengths through any surface low spots, and to "hump" over surface high spots.
  • the floating action of the channels accommodates longitudinal undulations in the surface, while the low section modulus for bending allows the channels to accommodate transverse undulations.
  • the lead applicator channels on the forward side F of the unit including blades 112 (including gap seal devices 115) and brushes 113, are permitted limited rotation about pivot pins 95, 97 produced by the frictional force of the blades and brushes sliding along the surface. The rotation is stopped at a point where the lead applicator presents first the squeegee blades 112 and then the brushes 113 to the surface, with the weight of the applicator evenly distributed between the two.
  • the leading squeegee-type blade 112 pushes most of the resurfacing material 191 ahead of the unit, while allowing more than a sufficient quantity to flow underneath.
  • the squeegee-type blades do not conform to individual surface irregularities, but, rather, bridge any small depressions, depositing acrylic material therein.
  • the leading squeegee-type blades also contact the surface high spots and higher areas of the surface with higher interfacial pressure resulting in a thin coating in these areas.
  • the viscosity of the acrylic material 191 determines the average mil thickness of material which flows under the leading squeegee-type blades 112 including gap seal blades 119.
  • the trailing brushes 113 of the lead applicator follow about four inches behind the leading blades and produce a more uniform thickness and a preliminary brushed texture in the material.
  • the rear applicator including associated brushes 123 and 124 (and brush gap seal devices 126, is free to rotate about pivot pins 95, 97 to a position where substantially all of the weight of the applicator supported by the lead brush 123. This creates considerable bending deflection in the brush bristles of brushes 123 as well as gap seal brushes 130, with consequent higher interfacial contact pressure between the bristles and the surface.
  • This heavier bristle loading causes the rear applicator to brush the wetted surface to a thinner mil thickness than that left by the lead applicator.
  • This also allows a small amount of acrylic material to build up ahead of the trailing brushes 123 which is used to cover up the drive wheel and caster tracks left in the wetted surface ahead of the rear applicator.
  • This additional bristle deflection is also advantageous because, as the rear applicator passes over small depressions in the surface, the bristles are allowed to straighten to some extent to provide uniform contact, and thus remove the excess material deposited by the squeegee-type blades, thereby providing a very uniform mil thickness to even the smallest undulations in the surface.
  • the trailing brushes 124 of the rear applicator only lightly contact the wetted surface and are employed primarily to apply a finish texture to the surface.
  • the trailing brushes 113 of the lead applicator may be omitted, their function being performed by the brushes of the rear applicator.
  • FIGURE 16 also illustrates a further feature of the invention related to the ability of the respective leading and trailing applicators to be pivoted upwardly to an inoperative position to facilitate transport and/or storage of the unit.
  • handles 160 attached to the various channel members may be employed.
  • closed loops 161 formed by U-bolts or the like are also provided on the channel members for engaging latching devices 162 provided on the frame sections.
  • One or more vertical posts 163 may be provided on the front and rear of the side frame sections for mounting the latching mechanism at the appropriate height while, in the center frame section, vertical posts 38 may be used.
  • FIGURE 16 illustrates in phantom, the leading and trailing applicators raised to an inoperative position.
  • a transport dolly is illustrated for facilitating transport of the frame center section 31.
  • the transport dolly is formed by a pair of box beam sections 170, 171 connected by a cross beam 172.
  • the box beams 170, 171 mount a pair of freely rotatable wheel mounting forks 173, 174, respectively.
  • Fork 173 mounts a tire 175, preferably of the pneumatic variety, for rotation about an axle or bolt 177.
  • fork 174 mounts a tire 176 for rotation about an axle or bolt 178.
  • An elongated handle 179 is pivotally mounted to the cross beam 172 via an inverted U-shaped bracket 180 and associated cotter-type pin 181.
  • a pair of upstanding, pin-engaging plates 182, 183 are fixed, by welding or other suitable means to the respective outer side surfaces of the box beams 170, 171.
  • the plates are provided with open-ended slots 184, 185, respectively, extending downwardly from the tops of the plates.
  • At least one of the box beam sections 170, 171 is also provided with a pair of upstanding ears 186, 187, one of which may be formed as an extension of plate 183.
  • box beam sections 170, 171 are adapted to engage and support the lower surfaces of beams 36, 37, respectively, while slots 184, 185 receive pins 150, 150 which are fixed to the ends of the beams 36, 37 of the frame center section.
  • These pins normally serve as connection means for the side or wing sections.
  • the side sections may be separated from the center section, which, of course, is the heaviest by reason of its carrying the motor, drive train, steering mechanism, etc.
  • the transport dolly is designed particularly as an aid to moving the frame center section.
  • the dolly is tilted to an inclined position relative to the frame center section so that slots 184, 185 may engage pins 150, 150.
  • handle 179 may be used as a lever to pivot the dolly in a counterclockwise direction, until box beams 170, 171 fully engage beams 36, 37.
  • the end of the frame center section, including casters 86 are lifted approximately four inches off the ground.
  • a pin 188 is inserted through aligned apertures 189 in the upstanding ears 186, 187, just above the top surface of the beam 37 so as to prevent the dolly from dropping down into the position illustrated in FIGURE 18.
  • handle 179 may be used to pull the frame center section with relative ease, due in large part to the relatively large pneumatic tires 175, 176.
  • a second dolly may be employed at the other end of the frame center section, although usually not required.
  • transport dollies is designed to facilitate movement to and from a court area, loading and off-loading vis-a-vis a truck bed, etc. while casters 86 are sufficient to move the apparatus about a court, and to or from adjacent courts during a resurfacing operation.
  • a plurality of rows or windrows of the resurfacing of the resurfacing material may be deposited in front of, and parallel to, the machine with additional windrows added as needed (as indicated in dotted line in FIGURE 1).
  • the first mentioned, and preferred pattern provides good spreading characteristics and minimizes the tendency of the material to flow around the side sections of the machine. In either case, it has also been found to be advantageous to spread a relatively small quantity of resurfacing material along the leading brushes of the trailing applicator to "prime" the brushes upon start up.
  • the machine drive is actuated to cause the machine to traverse the entire length of court in direction 194 until it reaches a position indicated in phantom by the reference numeral 193.
  • the flexible squeegee-type blades and brushes of the leading applicator spread and smooth out any windrows of resurfacing material as described above, while, at the same time, the flexible brushes of the trailing applicator smooth out and eliminate tracks and other surface irregularities caused by movement of the casters and drive wheels through the resurfacing material.
  • the final average overall thickness of the material applied to the surface is from about 12 to about 15 mil.
  • the unit may be arranged to move across the width of one or more aligned courts, such that half of one or more adjacent courts are resurfaced in one pass, while the other half of the one or more courts are resurfaced in a return pass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Road Repair (AREA)
  • Road Paving Structures (AREA)
  • Detergent Compositions (AREA)
EP19880301003 1987-02-05 1988-02-05 Verfahren zur Herstellung von Sport- und Spielplatzbelägen Expired - Lifetime EP0279570B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88301003T ATE99369T1 (de) 1987-02-05 1988-02-05 Verfahren zur herstellung von sport- und spielplatzbelaegen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US07/010,936 US4789265A (en) 1987-02-05 1987-02-05 Court resurfacing apparatus and process
US11749587A 1987-11-06 1987-11-06
US117495 1987-11-06
US10936 1996-01-31

Publications (2)

Publication Number Publication Date
EP0279570A1 true EP0279570A1 (de) 1988-08-24
EP0279570B1 EP0279570B1 (de) 1993-12-29

Family

ID=26681772

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880301003 Expired - Lifetime EP0279570B1 (de) 1987-02-05 1988-02-05 Verfahren zur Herstellung von Sport- und Spielplatzbelägen

Country Status (6)

Country Link
EP (1) EP0279570B1 (de)
JP (1) JPS63262167A (de)
AU (1) AU601809B2 (de)
CA (1) CA1267316A (de)
DE (1) DE3886565T2 (de)
ES (1) ES2048756T3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20100205A1 (it) * 2010-04-07 2011-10-08 Pierangelo Bedetti Macchina per la manutenzione di campi sportivi in terra
WO2011124643A1 (en) * 2010-04-07 2011-10-13 M. P. D. Group S.R.L. Sport clay court maintenance device
CN113106821A (zh) * 2021-04-21 2021-07-13 交通运输部公路科学研究所 一种用于装配式水泥混凝土铺面板的吊装定位装置及方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB217090A (en) * 1923-08-09 1924-06-12 Frederick George Barnes Improvements relating to machines for applying tar to roads and the like
US1914950A (en) * 1930-08-21 1933-06-20 Kanen Max Spreader for road surfacing fluid
US1994437A (en) * 1931-11-18 1935-03-12 Thogmartin Reis Construction C Machine for leveling and shaping roads
US2546928A (en) * 1947-05-02 1951-03-27 Anthony N Masabny Safety razor
US3153992A (en) * 1959-11-16 1964-10-27 E D Etnyre & Co Pavement sealer spreader apparatus
DE2534387A1 (de) * 1975-08-01 1977-02-03 Ulrich Krause Verfahren zum einbau von fluessigen, granulierten oder breiigen asphaltgemischen
US4465397A (en) * 1981-08-10 1984-08-14 Hollon Edmund D Track surface laying

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Publication number Priority date Publication date Assignee Title
JPS56115405A (en) * 1980-02-16 1981-09-10 Sumitomo Rubber Ind Pavenent constructing apparatus
JPS5917926U (ja) * 1982-07-23 1984-02-03 株式会社麗光 農園芸用蒸着フイルム
JPH0248682B2 (ja) * 1983-11-24 1990-10-25 Sunstar Engineering Inc Tenisukootoyodanseihosozainosekoho

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB217090A (en) * 1923-08-09 1924-06-12 Frederick George Barnes Improvements relating to machines for applying tar to roads and the like
US1914950A (en) * 1930-08-21 1933-06-20 Kanen Max Spreader for road surfacing fluid
US1994437A (en) * 1931-11-18 1935-03-12 Thogmartin Reis Construction C Machine for leveling and shaping roads
US2546928A (en) * 1947-05-02 1951-03-27 Anthony N Masabny Safety razor
US3153992A (en) * 1959-11-16 1964-10-27 E D Etnyre & Co Pavement sealer spreader apparatus
DE2534387A1 (de) * 1975-08-01 1977-02-03 Ulrich Krause Verfahren zum einbau von fluessigen, granulierten oder breiigen asphaltgemischen
US4465397A (en) * 1981-08-10 1984-08-14 Hollon Edmund D Track surface laying

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20100205A1 (it) * 2010-04-07 2011-10-08 Pierangelo Bedetti Macchina per la manutenzione di campi sportivi in terra
WO2011124643A1 (en) * 2010-04-07 2011-10-13 M. P. D. Group S.R.L. Sport clay court maintenance device
CN113106821A (zh) * 2021-04-21 2021-07-13 交通运输部公路科学研究所 一种用于装配式水泥混凝土铺面板的吊装定位装置及方法

Also Published As

Publication number Publication date
EP0279570B1 (de) 1993-12-29
DE3886565D1 (de) 1994-02-10
CA1267316A (en) 1990-04-03
JPS63262167A (ja) 1988-10-28
ES2048756T3 (es) 1994-04-01
AU601809B2 (en) 1990-09-20
DE3886565T2 (de) 1994-04-28
AU1142388A (en) 1988-08-11

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