Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
  • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
  • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
  • B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
  • B66C1/425—Gripping members engaging only the external or internal surfaces of the articles motor actuated
  • B66C1/427—Gripping members engaging only the external or internal surfaces of the articles motor actuated by hydraulic or pneumatic motors
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
  • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
  • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
  • B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
  • B66C1/422—Gripping members engaging only the external or internal surfaces of the articles actuated by lifting force
• • 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
  • E01C19/52—Apparatus for laying individual preformed surfacing elements, e.g. kerbstones
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F3/00—Dredgers; Soil-shifting machines
  • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
  • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements

Definitions

• the present invention relates to a paving machine having the features described in the preamble of claim 1.
• Machines have been known for some time for clamping, transporting and laying a plate of paving stones, these machines being constituted by a motor vehicle equipped with a clamp.
• a general overview of the state of the art in this area is clear from an article by R. Krconsr (see R. Kr ⁇ mer, wood,inho und Môglich eiten rationeller Veriegung von Betonpflastersteinen, in Betontechnik + Fertigteil-Technik, volume 3/198 *, p. 167 to 175).
• Paving machines conforming to the preamble of claim 1 are known, for example those placed on the market by the company Optimas, Bauieri und Baugerâte GmbH or those having pliers manufactured by the company Ernst Probst
• Greif- und Fordergerâte The first of these machines has the major drawback of having a mechanically operated clamp.
• the gripping force of a mechanical clamp is a direct function of the weight of the paving stone plate to be transported.
• it is the light paving slabs that are the most difficult to transport, because they are the thinnest slabs.
• the clamping force applied to the vertical faces of the paver plates must be greater the thinner the plate, and therefore lighter. It is the opposite that occurs when using mechanical pliers.
• neither above mentioned machines does not allow an "adjustment of the mutual spacing between each of the front and rear clamping elements.
• the clamp manufactured by the firm Probst is quite rudimentary as regards its guidance by the driver of the motor vehicle, and it must include guide sleeves which a worker manipulates next to the vehicle.
• a paving machine put on the market by the firm Hydromak Lehnen GmbH & Co. KG which includes a completely hydraulic control of the pinching elements. These are however arranged in a perfectly rigid manner on the frame of the clamp and the machine therefore almost needs a different clamp for each different form of paving stone plate.
• the present invention aims to remedy the drawbacks described above, by the development of an improved paving machine, comprising a universal clamp usable for all paving slabs and a motor vehicle capable of supporting this clamp and suitable for all paving work, without having the drawbacks of skidding the rear wheels.
• FIG. 1 represents a schematic view in elevation, in profile, of an embodiment of a paving machine according to the invention, in a position just before the laying of a plate of paving stones on the support bed.
• FIG. 2 represents a : elevation view, in profile, of the same paving machine, just before the removal of a plate of pavers from a package. For reasons of ease, we took advantage of this view to represent the raised position of the rear casters and the lowered position of the rear drive wheels, although this position is not used during the représen ⁇ ted operation.
• Figure 3 shows a perspective view, on an enlarged scale, of a clamp according to the invention.
• Figures 8 show schematically the paving machine at different stages of paving, with its corresponding accessory.
• the paving machine according to the invention illustrated in FIGS. 1 and 2 comprises a motor vehicle 1 generally provided with two front drive wheels 2 and two rear drive wheels 3.
• This machine comprises a tool-carrying member in the form of two articulated cantilever arms 4 (of which only one is shown), integral, and controlled by jacks 5 (of which only one is also shown) so as to be able to pivot between a high position and a low position.
• cantilever arms support a fastening element 6, arranged on these arms so as to be able to pivot around a horizontal axis 7 and controlled by a jack 8.
• a system of quick attachment (not shown) of work accessory.
• the paving machine illustrated in Figures 1 to 3 further comprises a clamp holder 9 having a quick fixing mechanism (not shown) capable of cooperating with the fixing system of the hooking element 6.
• This clamp holder 9 supports a clamp 10, which, in Figure 1, clamps a plate of paving stones and transports it to the place of installation.
• the clamp holder 9 has a quick fixing mechanism (not shown) capable of cooperating with the fixing system of the hooking element 6.
• a hanging frame 11 the elements of which form approximately a pyramid with a rectangular base, which carries at its top two legs 12 (only one of which appears in the figures) between which is fixed a pin 13 with a horizontal axis.
• an axis 14 is articulated, at one of its ends, so as to be able to pivot freely and its opposite end 15 is in the form of a plate.
• the plate 15 supports a bar 16 (see FIG. 3) which is crossed by the pivot axis 1 ⁇ and which has on its face oriented towards the plate 15 a corresponding plate 17, so as to allow rotation of the bar 16 around axis 14, with a minimum of friction.
• the second part of the clamp holder 9 is a lifter formed by the bar 16 which carries at its ends two wings 18 (of which only one is shown), each of these wings supporting at each of its ends a chain 19. These chains are connected to the chassis of the collet 10.
• the motor vehicle further comprises rollers 21 capable of freely pivoting about a horizontal axis 22 and freely rotating around a vertical axis 23 off-axis with respect to the 'horizontal axis.
• rollers 21 are arranged at the rear of the motor vehicle on a bracket 24.
• a wing of this bracket is connected to a horizontal shaft 25, supported by the chassis of the vehicle so as to be able to pivot around its axis.
• a cylinder 26 is. articulated, on the one hand, to the chassis of the vehicle and, on the other hand, to one end of a connecting rod 54, the other end of which is integral with the shaft 25.
• the rollers 21 are capable of pivoting between a raised position (see FIG. 2), in which the four driving wheels of the motor vehicle are in contact with the ground, and a low position (see Figure 1) in which the rear drive wheels are out of contact with the ground.
• FIG 3 is shown in more detail ⁇ lée the clamp used on the embodiment of paving machine illustrated.
• This clamp comprises a base frame formed in this embodiment of two parallel bars 27, which are kept at a constant distance between by U-shaped spacers 28 and which are suspended at their ends by the chains 19 of the lifter of the door. - pliers.
• On this base chassis are supported front clamping elements 29, rear clamping elements 30, and, as lateral clamping elements, clamping jaws 31 and 32.
• the aforementioned U-shaped spacers 28 are arranged so as to form means for supporting the front clamping elements 29 and rear 30 on the parallel bars 27.
• Each of the vertical arms 33 and 34 of each U-shaped spacer 28 is provided with its free end of common fastening means, such as a clamp 35.
• the core 36 of each spacer is arranged so as to be able to be telescopically extendable along its axis, towards the outside, at its two ends.
• the extendable arms 37 of the core 36 each carry at their free end a clamping element, front or rear as the case may be.
• This arrangement therefore allows individual adjustment of the spacing between two front and rear clamping elements oppo ⁇ ed, by axial extension of the web 36 of the U-shaped spacer 28. It also allows individual adjustment of the position of each spacer 28 on the parallel bars 27 by loosening the clamps 35, sliding the spacers along the bars 27 and tightening the clamps 35. It is therefore possible to adjust the spacing between the front clamping elements 29 as well as between the elements rear pinching 30. Finally, this arrangement also makes it possible to remove or add easily front and rear clamping elements on the parallel bars.
• the front clamping elements 29 are claws which are mounted at the end of an extendable arm 37 so as to be able to pivot around an axis transverse to the axis of the arm.
• Each of these extendable arms also supports, in an articulated manner, an individual control means, in the form of a hydraulic cylinder 38 whose piston 39 is connected in an articulated manner to the upper end of a claw 29 and can therefore rotate it between a high rest position and a low clamping position.
• One of these jacks 38 is connected, on the one hand, to the hydraulic system of the motor vehicle and, on the other hand, to the other jacks 38 arranged in parallel.
• the rear clamping elements 30 are, in the example illustrated, simple fixed stops which project downwards relative to the extendable arms 37 which support them.
• the spacers of the parallel bars may be independent of the means for supporting the front and rear clamping elements and these could also be envisaged in an independent form for the front clamping elements and for the rear clamping elements.
• rotary clamping claws instead of the rear stops 30.
• the front clamping elements 29 and rear 30 are equipped with a slide 61 in which a slide 60 can be fixed in height adjustable, using bolts clamping 62.
• a clamping plate 63 is fixed to the lower end of each slide 60 and its height position can with this arrangement be adjusted according to variations in the thickness of the blocks of the block of blocks to tighten.
• This clamping plate 63 is provided with orifices 64 for fixing application elements, when the shape of the edge of the paving stone plate requires it. In the illustrated case, such elements have not been shown because the longitudinal edges of the plate are planar.
• the parallel bars 27 support between their extremi ⁇ tees two pivot shafts 40 and 41, so as to allow them to pivot freely about their axis.
• a drive pinion 42, 43 is fixedly connected to each of these shafts. These pinions are mutually connected by a transmission chain 44.
• the lower strand of this chain passes directly from a pinion to the 'other.
• the upper strand of the chain, coming from the pinion 42 is connected to the end 45 of a piston, in the withdrawal position in FIG. 3, of a hydraulic cylinder 46, this piston being capable of projecting out of the cylinder 46 in the opposite direction to the pinion 42.
• the upper strand of the chain, coming from the pinion 43 is connected to the cylinder of the cylinder 46, by means of wings 48, which are arranged projecting upwards on the cylinder and between which the upper strand of the chain freely passes from the pinion 42.
• the jack 46 is suspended both by the flexible conduits for circulation of the hydraulic medium and by the tension to which it subjects the chain 44.
• the pivoting shafts 40 and 41 fixedly support the lateral clamping jaws 31 and 32 to which can be quickly fixed, for example by bolting, application pieces 49 suitable for the shape of the short sides of the plate. blocks to be clamped and to the width of the blocks of blocks to be clamped Under the control of the actuator 46, the jaws can therefore pivot around the pivot shafts 40 and 41 between a clamping position, shown in FIG. 3, and a high, resting position, located approximately 180 ° from the previous one. , so that in the high position the jaws do not protrude relative to the overall dimensions of the clamp.
• the application pieces 49 can for example be provided on their internal face with elastic elements capable of compensating for the unevenness of shape of the short sides of the block of paving stones to be clamped, in particular when the latter is of wavy shape.
• These pieces can also, as illustrated in Figure 3, be equipped with small pushers 50 every two rows of blocks and alternately on the left jaw and on the right. The forked end of these pushers is crossed by the axis of a ball bearing 51.
• This arrangement makes it possible, when the pavers are parallelepipedal, to mutually slide the rows of pavers of the paver plate 52 in the position illustrated in the figure 3, while this plate, in storage, is sometimes in a rectangular shape.
• This arrangement is therefore advantageous for the laying pattern with "selvedge with alternating joints" from a pack of ordinary pavers, not provided for the mechanical laying of this pattern.
• the clamp is adapted according to the shape of the paver plates to be clamped and the number of rows of pavers that each plate comprises. Therefore the necessary number of claws 29 and rear stops 30 is mounted on the shafts 27 with the appropriate spacing between claws and between stops as well as with the appropriate spacing between each claw and its opposite stop.
• Application pieces corresponding to the width of the paving slab and to the shape of its edge are bolted to the side jaws as well as possibly also to the claws and the stops, for example when the longitudinal edges of the paving slabs do not are not plan.
• the vehicle is then advanced towards a pack of blocks 53 with the arms 4 raised and the piston of the jack 8 slightly retracted so that the projection 20 arranged at the top of the attachment frame 11 abuts against the axis 14 which connects this chassis to the lifter to which the collet clamp is suspended 10.
• the front side of the collet is slightly raised relative to the rear side.
• all the front claws 29 and the side jaws 31 and 32 are controlled in the raised position by means of their control means.
• the pilot can easily bring the clamp 10 in this position above a pack of pavers, while aligning the rear stops 30 opposite the rows of pavers of the paver plate 52 to be clamped .
• the clamp 31 and 32 of the clamp are then brought into the clamping position which allows perfect centering of the paving stone plate with respect to the length of the paving stone plate and brings the claws 29 and stops 30 strictly opposite their row of paving stones respective to tighten.
• the front claws 29 are then only brought into the clamping position.
• the paving stone plate must have an installation pattern with "selvedges with alternating joints”
• the front claws 29 are first brought into the clamping position and this is only then that the lateral jaws 31 and 32, then provided with pushers 50, are brought into the clamping position and cause the rows of blocks to shift in relation to one another.
• This shifting can be carried out on the pack of pavers 53 itself, but it is preferable to carry it out next to the packet so that the plate of pavers subjected to the shifting does not risk entraining the lower plates of the packet. In his movement.
• the pilot can then transport the plate of paving stones to the place of installation, as illustrated in FIG. 1. There, again, it is desirable to raise the lateral jaws by 180 ° beforehand, in order to facilitate installation in any conditions. of space. 'The plate once installed, the claws are raised and the operation can start again.
• the motor vehicle can, thanks to its quick attachment attachment system, be used for each of the paving operations, that is to say the spreading of a bed intended to receive the paving slabs and its leveling (see figure 4), leveling the bed, moving packets of pavers (see figure 5), spreading sand to fill the joints (see figure 6), compacting the pavement in place ( see figure 7), the sweep of the finished work (see figure 8) and the loading of the cuttings.
• the paving machine according to the invention therefore further comprises, in particular a toothless bucket 55 for spreading the bed intended to receive the paving slabs, equalization strips (not shown) for the - leveling of the bed , a pallet puller 56 to bring the packets of pavers near the workplace, a sand spreader 57 to fill the joints of the pavement laid, a vibrating plate 58 for compacting the pavement and / or a rotary brush 59 for sweeping excess sand.
• a toothless bucket 55 for spreading the bed intended to receive the paving slabs
• equalization strips (not shown) for the - leveling of the bed
• a pallet puller 56 to bring the packets of pavers near the workplace
• a sand spreader 57 to fill the joints of the pavement laid
• a vibrating plate 58 for compacting the pavement
• / or a rotary brush 59 for sweeping excess sand.
• the length of the parallel bars is designed to be able to clamp plate lengths varying between 1000 and 1300 mm between the side jaws.
• each claw 29 carries an arcuate part 65 which projects upwards and at which the free end of the piston rod 66 of each cylinder 38 can be connected in an articulated manner, in several different height positions, a row of perforations 67 being provided in an arc from top to bottom of this part 65 for the connection of the piston rod 66. It is thus possible to adjust a more or less strong pressure to each claw 29 as a function of the connection point between the piston rod and its arcuate part.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Mining & Mineral Resources (AREA)
• General Engineering & Computer Science (AREA)
• Architecture (AREA)
• Road Paving Machines (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=3843742

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Family Cites Families (6)

• 1984
  • 1984-03-23 BE BE0/212617A patent/BE899230A/fr not_active IP Right Cessation
• 1985
  • 1985-03-22 WO PCT/BE1985/000006 patent/WO1985004435A1/fr not_active Application Discontinuation
  • 1985-03-22 EP EP19850901328 patent/EP0179777A1/de not_active Ceased

Non-Patent Citations (1)

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