WO1990005214A1 - Improvements in or relating to surface treatment machines - Google Patents

Improvements in or relating to surface treatment machines Download PDF

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Publication number
WO1990005214A1
WO1990005214A1 PCT/GB1989/001324 GB8901324W WO9005214A1 WO 1990005214 A1 WO1990005214 A1 WO 1990005214A1 GB 8901324 W GB8901324 W GB 8901324W WO 9005214 A1 WO9005214 A1 WO 9005214A1
Authority
WO
WIPO (PCT)
Prior art keywords
drum
head
surface treatment
machine
heads
Prior art date
Application number
PCT/GB1989/001324
Other languages
French (fr)
Inventor
Michael Griffiths
Original Assignee
Rapitex Systems Limited
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
Application filed by Rapitex Systems Limited filed Critical Rapitex Systems Limited
Publication of WO1990005214A1 publication Critical patent/WO1990005214A1/en

Links

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
    • E01C23/08—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 for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
    • E01C23/085—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 for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
    • E01C23/088—Rotary tools, e.g. milling drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
    • B28D1/181—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools using cutters loosely mounted on a turning tool support

Definitions

  • This invention relates to surface treatment machines and parts for them and in particular, but not exclusively, to the treatment of load bearing surfaces such as roads, floors and runways.
  • the required treatment is to cut grooves in the surface by the use of whirling flails mounted on a drum.
  • the treatment depth is however, only a fev; mm and so it is important to ensure that the drum follows precisely the profile of the surface along its full length.
  • attempts have been made to achieve this by having fore and aft guide wheels which determine the position of the drum relative to the surface.
  • these produce unsatisfactory results over localised distortions such as depressions caused by vehicle wheels passing along the surface. Often the bottom of such depressions is missed entirely and several passes may be necessary before a particular area is fully treated.
  • the invention consists in a surface treatment head comprising a drum rotatable about an axis and carrying a number of treatment elements for engaging a surface as the drum rotates and a pair of surface following wheel means mounted generally coaxially with the drum and adjacent res ⁇ pective ends of the drum to determine the position of the drum, and hence the elements, relative to the surface.
  • the wheel means are wheels of generally the same diameter as the drum and are mounted as close as possible to the drum ends.
  • the wheel means may be constituted by a pair of rollers mounted on an arm which is rotatably mounted about the drum axis such that the ground engaging surface of the rollers lie on the circumference of an imaginary wheel mounted coaxially with the drum and of generally the same diameter.
  • the position of the wheel means may be adjustable in a sense to adjust the height of the drum above the surface; for example, at least one wheel means may be mounted on a pivoted lever, the position of the free end of which is determined by an adjustable stop.
  • the invention provides a surface treatment machine having at least one surface treatment head and means for mounting the head for pivotal movement about an axis extending in the intended direction of travel of the machine.
  • the invention provides a surface treatment machine having a plurality of treatment heads offset in the intended direction of travel of the machine and means for sequentially lifting the heads so that the surface areas treated by the heads all terminate yencrnllv i « ⁇ a common line.
  • the invention consists in a surface treatment machine having a plurality of heads mounted on a drum, a pair of castor wheels mounted on the drum for vertical movement relative to the drum and means for raising and lowering the castors such that the drum can be lifted, to lift at least one head from the ground.
  • the castors are adjacent the rear of the machine and are positioned so that the machine can be readily turned around for a further pass.
  • the invention includes a surface treatment machine having one or more heads as defined above and having any of the features of a surface treatment machine as set out above.
  • Figure 1 is a diagrammatic view of a surface treatment machine
  • Figure 2 is an end view of a treatment head of the machine of Figure 1 ;
  • Figure 3 is a view from above of the head of Figure 2 with a mounting removed;
  • Figure 4 is a diagrammatic side view showing an alternative guide.
  • ⁇ surface treatment machine is generally indicated in Figure 1 at 10.
  • the machine is designed to be supported on the rear of a tractor and provided with drive from a power take-off. These elements are not indicated in the Figures.
  • the machine 10 has a frame 11 which supports treatment heads 12, 13 and 14 which are offset both longitudinally and transversely.
  • the two forward most heads 12, 13 are mounted on bars 15, 16 which can be pivoted about respective transverse horizontal axis by rams 17, 18 so that they can be raised or lowered from the surface to be treated.
  • Power is supplied to the machine via a drive shaft 19 which is connected to a gear box 20, which in turn drives a pulley 21 via a shaft 22.
  • the pulley 21 is coupled to two further pulleys 23, 24 via a triangular belt configuration 25 and is further coupled via a belt 26 to an additional pulley 27.
  • Each of pulleys 23, 24 and 27 drive respective treatment heads 12, 13 and 14 via drive shafts including universal couplings as is illustrated, by way of example, at 28.
  • the machine carries a pair of vertically orientated rams 29, 30 at the rear of the drum 11 which have castors 31, 32 at the their lower ends which can be raised and lowered so that in the lowered position they lift the rear treatment head 14 off the ground and provide an easy turning motion for the machine.
  • FIGs 2 and 3 each of the treatment heads are essentially identical and one will now be described with reference to Figures 2 and 3.
  • the head 14 comprises a box 33 in which is rotatably mounted a drum 34.
  • the drum 34 is made up of a series of parallel plates 35 mounted on a central sleeve 36 and which carry peripheral flails 37 mounted on bolts 38 (for simplicity only two such flails are illustrated) . As the drum 34 rotates these flails engage a surface 39 and cut into it to a depth determined by guide wheels 40, 41. Both these guide wheels are mounted coaxially with the drum 34 to free run independently of it. It will be noted that they are mounted extremely close to the ends of the drum 34 and are of the same general diameter as the drum. Accordingly the surface profile which they read Is almost identical to that engaged by the flails 37 and it is read at the same rate. This leads to a significant improvement in the eveness of the treatment both in. terms of depth and total cover.
  • This profile reading of the wheels is further improved by mounting the heads for rotation on a longitudinally shaft 42 suspended from the frame 11 so that the head 14 can pitch with transverse inclinations of the surface.
  • the attachment 43 which mounts the head 14 on the shaft 42 can be quickly released by undoing bolts 44 thus enabling the heads to be used independently for tidying up at the end of a job as a motor can be simply mounted at the top of the head.
  • the wheels 40, 41 are mounted on a pivoted lever 45 so that their vertical position can be adjusted by an adjustable stop 46. Limit abutments 47 and 48 are also provided.
  • FIG 4 shows an alternative to the guide wheels 40, 41.
  • an inverted T-shaped support 50 is pivotally mounted on the shaft 36 and carries at its head a pair of rollers 51, 52. These are arranqed so that their ground engaging surfaces lie on the circumference of an imaginary wheel 53 which generally corresponds to the wheels 40, 41.
  • the result is effectively the same and indeed in some circumstances it may be possible to replace rollers 51 and 52 with a curved skid.
  • the vertical position of the support 50 is adjustable to allow height adjustment of the drum. It v.'ill be understood that all the inventive features of this machine are equally applicable to many other surface treatment machines and apparatus and are not dependent on a particular drum construction or the type of flail scarifier used. However, the construction of the drums and heads illustrated in these drawings provides for particularly simple on-site repair.

Abstract

A machine (10) has a drum (11) which supports treatment heads (12, 13, 14) which are offset both longitudinally and transversely. Each of the treatment heads (14) comprises a box (33) in which is rotatably mounted a drum (34). The drum (34) carries flails (37) for engaging a surface (39), the depth of cut being determined by guide wheels (40, 41) which are mounted coaxially with the drum (34) and run independently of it. These wheels are mounted extremely close to the ends of the drum (34) and are of the same general diameter as the drum allowing for extremely even treatment of the surface.

Description

Improvements in or Relating to Surface Treatment Machines
This invention relates to surface treatment machines and parts for them and in particular, but not exclusively, to the treatment of load bearing surfaces such as roads, floors and runways. In many instances the required treatment is to cut grooves in the surface by the use of whirling flails mounted on a drum. The treatment depth is however, only a fev; mm and so it is important to ensure that the drum follows precisely the profile of the surface along its full length. To date attempts have been made to achieve this by having fore and aft guide wheels which determine the position of the drum relative to the surface. However, these produce unsatisfactory results over localised distortions such as depressions caused by vehicle wheels passing along the surface. Often the bottom of such depressions is missed entirely and several passes may be necessary before a particular area is fully treated. Existing machines also suffer from a lack of manoeuvreability at the end of each pass, and where multiple heads are being used in a longitudinally offset arrangement, which is necessary for transverse overlap, the ends currently produce a castillated edge. It is an object of the invention to produce surface treatment heads and or machines which to at least some extent mitigate some or all of the above problems. From one aspect the invention consists in a surface treatment head comprising a drum rotatable about an axis and carrying a number of treatment elements for engaging a surface as the drum rotates and a pair of surface following wheel means mounted generally coaxially with the drum and adjacent res¬ pective ends of the drum to determine the position of the drum, and hence the elements, relative to the surface.
In a preferred embodiment the wheel means are wheels of generally the same diameter as the drum and are mounted as close as possible to the drum ends. Alternatively the wheel means may be constituted by a pair of rollers mounted on an arm which is rotatably mounted about the drum axis such that the ground engaging surface of the rollers lie on the circumference of an imaginary wheel mounted coaxially with the drum and of generally the same diameter. The position of the wheel means may be adjustable in a sense to adjust the height of the drum above the surface; for example, at least one wheel means may be mounted on a pivoted lever, the position of the free end of which is determined by an adjustable stop.
From another aspect the invention provides a surface treatment machine having at least one surface treatment head and means for mounting the head for pivotal movement about an axis extending in the intended direction of travel of the machine. According to another aspect the invention provides a surface treatment machine having a plurality of treatment heads offset in the intended direction of travel of the machine and means for sequentially lifting the heads so that the surface areas treated by the heads all terminate yencrnllv i«Λ a common line.
From a still further aspect the invention consists in a surface treatment machine having a plurality of heads mounted on a drum, a pair of castor wheels mounted on the drum for vertical movement relative to the drum and means for raising and lowering the castors such that the drum can be lifted, to lift at least one head from the ground.
Preferably the castors are adjacent the rear of the machine and are positioned so that the machine can be readily turned around for a further pass.
The invention includes a surface treatment machine having one or more heads as defined above and having any of the features of a surface treatment machine as set out above.
Although the invention has been defined above it is to be understood that it includes any inventive combination of the features set out above or in the following description. The invention may be performed in various ways and a specific embodiment will now be described by way of example, with reference to the accompanying drawings, in which :-
Figure 1 is a diagrammatic view of a surface treatment machine; Figure 2 is an end view of a treatment head of the machine of Figure 1 ;
Figure 3 is a view from above of the head of Figure 2 with a mounting removed; and
Figure 4 is a diagrammatic side view showing an alternative guide.
Λ surface treatment machine is generally indicated in Figure 1 at 10. The machine is designed to be supported on the rear of a tractor and provided with drive from a power take-off. These elements are not indicated in the Figures.
The machine 10 has a frame 11 which supports treatment heads 12, 13 and 14 which are offset both longitudinally and transversely. The two forward most heads 12, 13 are mounted on bars 15, 16 which can be pivoted about respective transverse horizontal axis by rams 17, 18 so that they can be raised or lowered from the surface to be treated. Power is supplied to the machine via a drive shaft 19 which is connected to a gear box 20, which in turn drives a pulley 21 via a shaft 22. The pulley 21 is coupled to two further pulleys 23, 24 via a triangular belt configuration 25 and is further coupled via a belt 26 to an additional pulley 27. Each of pulleys 23, 24 and 27 drive respective treatment heads 12, 13 and 14 via drive shafts including universal couplings as is illustrated, by way of example, at 28. The machine carries a pair of vertically orientated rams 29, 30 at the rear of the drum 11 which have castors 31, 32 at the their lower ends which can be raised and lowered so that in the lowered position they lift the rear treatment head 14 off the ground and provide an easy turning motion for the machine. Turning to Figures 2 and 3 each of the treatment heads are essentially identical and one will now be described with reference to Figures 2 and 3. The head 14 comprises a box 33 in which is rotatably mounted a drum 34. The drum 34 is made up of a series of parallel plates 35 mounted on a central sleeve 36 and which carry peripheral flails 37 mounted on bolts 38 (for simplicity only two such flails are illustrated) . As the drum 34 rotates these flails engage a surface 39 and cut into it to a depth determined by guide wheels 40, 41. Both these guide wheels are mounted coaxially with the drum 34 to free run independently of it. It will be noted that they are mounted extremely close to the ends of the drum 34 and are of the same general diameter as the drum. Accordingly the surface profile which they read Is almost identical to that engaged by the flails 37 and it is read at the same rate. This leads to a significant improvement in the eveness of the treatment both in. terms of depth and total cover. This profile reading of the wheels is further improved by mounting the heads for rotation on a longitudinally shaft 42 suspended from the frame 11 so that the head 14 can pitch with transverse inclinations of the surface. The attachment 43 which mounts the head 14 on the shaft 42 can be quickly released by undoing bolts 44 thus enabling the heads to be used independently for tidying up at the end of a job as a motor can be simply mounted at the top of the head. As can be seen in Figure 2 the wheels 40, 41 are mounted on a pivoted lever 45 so that their vertical position can be adjusted by an adjustable stop 46. Limit abutments 47 and 48 are also provided.
With current machines, as has been mentioned above, the longitudinal offsetting of the treatment heads results in a castillated edge. In the applicants machine the hydraulic valves operating rams 17, 18 and 29, 30 are arranged so that they operate sequentially with the result that treatment head 12 is lifted first, followed by 13 and finally 14, the timing being arranged so that the areas of treatment end in a common l ine .
Figure 4 shows an alternative to the guide wheels 40, 41. In this arrangement an inverted T-shaped support 50 is pivotally mounted on the shaft 36 and carries at its head a pair of rollers 51, 52. These are arranqed so that their ground engaging surfaces lie on the circumference of an imaginary wheel 53 which generally corresponds to the wheels 40, 41. The result is effectively the same and indeed in some circumstances it may be possible to replace rollers 51 and 52 with a curved skid. The vertical position of the support 50 is adjustable to allow height adjustment of the drum. It v.'ill be understood that all the inventive features of this machine are equally applicable to many other surface treatment machines and apparatus and are not dependent on a particular drum construction or the type of flail scarifier used. However, the construction of the drums and heads illustrated in these drawings provides for particularly simple on-site repair.

Claims

Claims
1. A surface treatment head comprising a drum rotatable about an axis and carrying a number of treatment elements for engaging a surface as the drum rotates and a pair of surface following wheel means mounted generally coaxially with the drum and adjacent respective ends of the drum to determine the position of the drum, and hence the elements relative to the surface.
2. A head as claimed in Claim 1, wherein the wheel means are constituted by means of generally the same diameter as the drum and are mounted as close as possible to the drum ends.
3. A head as claimed in Claim 1, and a pair of rollers constituted by a pair of rollers mounted on an ami which is pivotally mounted about the drum axis, such that the ground engaging surfaces of the rollers are on the circumference of an imaginary wheel mounted coaxially with the drum and of generally the same diameter.
4. A head as claimed in any one of Claims 1 to 3, wherein the position of the wheel means is adjustable in a sense to adjust the height of the drum above the surface.
5. A head as claimed in Claim 4, wherein at least one of the wheel means is mounted on a pivoted lever, the position of the free end of which is determined by an adjustable stop.
6. A surface treatment machine having at least one surface treatment head and means for mounting the head for pivotal movement about an axis extending in the intended direction of travel of the machine.
7. A surface treatment machine having a plurality of treatment heads offset in the intended direction of travel of the machine and means for sequentially lifting the heads so that the surface areas treated by the heads all terminate generally at a common line.
8. A surface treatment machine having a plurality of heads mounted on a drum, a pair of castor wheels mounted on the drum for vertical movement relative to the drum and means for raising and lowering the castors such that the drum can be lifted to lift at least one head from the ground.
9. A- surface treatment machine as claimed in any one of Claims 6 to 8 having a surface treatment head as claimed in any one of Claims 1 to 5.
PCT/GB1989/001324 1988-11-11 1989-11-07 Improvements in or relating to surface treatment machines WO1990005214A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB888826400A GB8826400D0 (en) 1988-11-11 1988-11-11 Improvements in/relating to surface treatment machines
GB8826400.7 1988-11-11

Publications (1)

Publication Number Publication Date
WO1990005214A1 true WO1990005214A1 (en) 1990-05-17

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Family Applications (1)

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PCT/GB1989/001324 WO1990005214A1 (en) 1988-11-11 1989-11-07 Improvements in or relating to surface treatment machines

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WO (1) WO1990005214A1 (en)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH307911A (en) * 1952-04-25 1955-06-30 L & H Rosenmund Vorm Louis Ros Milling machine for working off rocks and rock-like masses, primarily from road surfaces.
US3694033A (en) * 1970-11-09 1972-09-26 Christensen Diamond Prod Co Roadway paint stripe grooving machine
US3778110A (en) * 1971-12-27 1973-12-11 Cardinal Ind Inc Supporting cutter assemblies for multiple grooving of pavement
US3779607A (en) * 1971-12-27 1973-12-18 Cardinal Ind Inc Supporting cutter assemblies for multiple grooving of pavement
FR2237009A1 (en) * 1973-07-10 1975-02-07 Wirtgen Reinhard
US3902760A (en) * 1972-06-09 1975-09-02 Engelhard Min & Chem Pavement grooving machine having plural, independently movable grooving heads
CH586792A5 (en) * 1974-12-06 1977-04-15 Arx Ag Machine for cleaning and roughing road surfaces - has chassis supporting secondary adjustable frame with several rotating tools
EP0143003A2 (en) * 1983-11-23 1985-05-29 Bowmer & Kirkland Product Sales Limited Road milling or cutting machine
GB2155525A (en) * 1984-03-14 1985-09-25 Reinhard Wirtgen Road cutting machine
EP0156954A1 (en) * 1982-04-15 1985-10-09 Alfred Dr. Hackmack Supporting and depth adjusting device for attachments which are mounted to the boom of excavators, earth moving vehicles, front loaders or the like
WO1987002398A1 (en) * 1985-10-16 1987-04-23 Rapitex (Highways) Limited A machine for treating a road surface or the like

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH307911A (en) * 1952-04-25 1955-06-30 L & H Rosenmund Vorm Louis Ros Milling machine for working off rocks and rock-like masses, primarily from road surfaces.
US3694033A (en) * 1970-11-09 1972-09-26 Christensen Diamond Prod Co Roadway paint stripe grooving machine
US3778110A (en) * 1971-12-27 1973-12-11 Cardinal Ind Inc Supporting cutter assemblies for multiple grooving of pavement
US3779607A (en) * 1971-12-27 1973-12-18 Cardinal Ind Inc Supporting cutter assemblies for multiple grooving of pavement
US3902760A (en) * 1972-06-09 1975-09-02 Engelhard Min & Chem Pavement grooving machine having plural, independently movable grooving heads
FR2237009A1 (en) * 1973-07-10 1975-02-07 Wirtgen Reinhard
CH586792A5 (en) * 1974-12-06 1977-04-15 Arx Ag Machine for cleaning and roughing road surfaces - has chassis supporting secondary adjustable frame with several rotating tools
EP0156954A1 (en) * 1982-04-15 1985-10-09 Alfred Dr. Hackmack Supporting and depth adjusting device for attachments which are mounted to the boom of excavators, earth moving vehicles, front loaders or the like
EP0143003A2 (en) * 1983-11-23 1985-05-29 Bowmer & Kirkland Product Sales Limited Road milling or cutting machine
GB2155525A (en) * 1984-03-14 1985-09-25 Reinhard Wirtgen Road cutting machine
WO1987002398A1 (en) * 1985-10-16 1987-04-23 Rapitex (Highways) Limited A machine for treating a road surface or the like

Also Published As

Publication number Publication date
GB8826400D0 (en) 1988-12-14

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