EP3951061A1 - Dispositif de finition d'asphalte - Google Patents

Dispositif de finition d'asphalte Download PDF

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Publication number
EP3951061A1
EP3951061A1 EP20782568.8A EP20782568A EP3951061A1 EP 3951061 A1 EP3951061 A1 EP 3951061A1 EP 20782568 A EP20782568 A EP 20782568A EP 3951061 A1 EP3951061 A1 EP 3951061A1
Authority
EP
European Patent Office
Prior art keywords
screed
rear side
level difference
pavement
asphalt finisher
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.)
Withdrawn
Application number
EP20782568.8A
Other languages
German (de)
English (en)
Other versions
EP3951061A4 (fr
Inventor
Tetsuya Watanabe
Hideki Takayama
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.)
Sumitomo SHI Construction Machinery Co Ltd
Original Assignee
Sumitomo SHI Construction Machinery Co Ltd
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 Sumitomo SHI Construction Machinery Co Ltd filed Critical Sumitomo SHI Construction Machinery Co Ltd
Publication of EP3951061A1 publication Critical patent/EP3951061A1/fr
Publication of EP3951061A4 publication Critical patent/EP3951061A4/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • E01C19/48—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
    • 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
    • E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
    • E01C2301/14—Extendable screeds
    • E01C2301/16—Laterally slidable screeds

Definitions

  • the present disclosure relates to asphalt finishers.
  • Patent Document 1 Japanese Laid-Open Patent Application No. 2017-160636
  • the asphalt finisher described above is configured so that the surface of the pavement material that is compacted by the front side screed (hereinafter, referred to as the "central pavement surface”) and the surface of the pavement material that is compacted and compacted by the rear side screed (hereinafter, referred to as the "side pavement surface”) partially overlap along a traveling direction.
  • the above described asphalt finisher causes a difference between the height of the central pavement surface and the height of the side pavement surface.
  • the pavement surface which is the surface of the pavement body finally formed, causes a level difference, and the quality of the pavement surface may be degraded.
  • An asphalt finisher includes a tractor, a hopper that is mounted on a front side of the tractor and receives pavement material, a conveyor that feeds the pavement material in the hopper to a rear side of the tractor, a screw that spreads the pavement material fed by the conveyor on the rear side of the tractor, a screed that compacts the pavement material spread by the screw on a rear side of the screw, an information acquiring device that acquires information concerning a surface of the pavement material compacted by the screed, and a controller, wherein the screed includes a front side screed and a rear side screed, positions of the front side screed and the rear side screed being shifted along a longitudinal direction of the asphalt finisher, and wherein the controller determines whether there is a level difference formed between a surface of the pavement material compacted by the front side screed and a surface of the pavement material compacted by the rear side screed based on the information acquired by the information acquiring device.
  • the above-described measure provides an asphalt finisher that can control degradation of the quality of a pavement surface.
  • FIG. 1 is a side view of an asphalt finisher 100, which is an example of a road machine according to an embodiment of the present invention.
  • FIG. 2 is a top view of the asphalt finisher 100.
  • the asphalt finisher 100 mainly includes a tractor 1, a hopper 2, and a screed 3.
  • the direction of the hopper 2 viewed from the tractor 1 (+X direction) is set forward
  • the direction of the screed 3 viewed from the tractor 1 (-X direction) is set backward.
  • the tractor 1 is a mechanism for driving the asphalt finisher 100.
  • the tractor 1 rotates rear wheels 5 using a rear wheel driving hydraulic motor and rotates front wheels 6 using a front wheel driving hydraulic motor to move the asphalt finisher 100.
  • the rear wheel driving hydraulic motor and the front wheel driving hydraulic motor are rotated by receiving the hydraulic oil from the hydraulic pump.
  • the rear wheels 5 and the front wheels 6 may be replaced by crawlers.
  • the controller 50 is a controller that controls the asphalt finisher 100.
  • the controller 50 is constituted by a micro-calculator including a CPU, memory, and non-volatile storage devices, and is mounted on the tractor 1.
  • Functional elements that perform each function performed by the controller 50 are substantialized by the CPU executing a program stored in the non-volatile storage device.
  • each functional element in the controller 50 may be hardware, firmware, or the like.
  • the hopper 2 is a mechanism for receiving pavement material.
  • the hopper 2 is installed on the front side of the tractor 1 and is configured to be opened and closed in the Y-axis direction (vehicle width direction) using the hopper cylinder.
  • the asphalt finisher 100 ordinarily receives the pavement material from the dump truck bed with the hopper 2 fully open.
  • the pavement material is, for example, an asphalt mixture.
  • FIGS. 1 and 2 illustrate a state in which the hopper 2 is fully opened. The operator of the asphalt finisher 100 ordinarily closes the hopper 2 when the pavement material in the hopper 2 decreases and gathers pavement material near the inner wall of the hopper 2 to be at the center of the hopper 2.
  • FIGS. 1 and 2 illustrate the pavement material PV spread by the screw SC in a rough texture.
  • the screed 3 is a mechanism for compacting the pavement material PV.
  • the screed 3 includes a front side screed 30 and a rear side screed 31.
  • the front side screed 30 includes a left front side screed 30L and a right front side screed 30R
  • the rear side screed 31 includes a left rear side screed 31L and a right rear side screed 31R.
  • the screed 3 is a floating screed that is towed by the tractor 1 and coupled to the tractor 1 via a leveling arm 3A.
  • the screed 3 raises and falls together with the leveling arm 3A by the expansion and contraction of the screed raising and lowering cylinder 25.
  • a leveling cylinder 28 is a hydraulic cylinder that causes a front end portion of the leveling arm 3A to rise and fall (move up and down) to adjust a pavement material leveling thickness.
  • the leveling cylinder 28 includes a left leveling cylinder 28L and a right leveling cylinder 28R.
  • the rear side screed 31 is configured to be expandable and contractible in the width direction by an expandable and contractible cylinder (not illustrated) .
  • the rear side screed 31 may be a fixed (non-telescoping) screed that is connected when used with a crane or the like.
  • a screed raising and lowering device 29 is attached to a connecting portion between the front side screed 30 and the rear side screed 31.
  • the screed raising and lowering device 29 is configured to cause the rear side screed 31 to rise and fall relative to the front side screed 30.
  • the screed raising and lowering device 29 rotates a screed raising and lowering motor as a hydraulic actuator in response to a control command from the controller 50 and drives a rotation-to-direct motion conversion mechanism mounted on the rear side screed 31 to cause the rear side screed 31 to rise and fall.
  • the screed raising and lowering device 29 includes a left screed raising and lowering device 29L for causing the left rear side screed 31L to rise and fall and a right screed raising and lowering device 29R for making the right rear side screed 31R to rise and fall.
  • the rotation-to-direct motion conversion mechanism is, for example, a bolt-nut mechanism.
  • the rotation-to-direct motion conversion mechanism may be another mechanism such as a ball screw mechanism or a rack-and-pinion mechanism.
  • the screed raising and lowering motor may be an electric motor.
  • the screed raising and lowering device 29 may be a hydraulic cylinder.
  • a mold board 43 is attached to a front part of the screed 3.
  • the mold board 43 includes a left mold board 43L and a right mold board 43R.
  • the left mold board 43L is configured to adjust the amount of the pavement material PV that remains in front of the left rear side screed 31L.
  • the right mold board 43R is configured to adjust the amount of the pavement material PV that remains in front of the right rear side screed 31R.
  • the pavement material PV reaches below the left rear side screed 31L through the gap between the lower end of the left mold board 43L and a road bed RB and reaches below the right rear side screed 31R through the gap between the lower end of the right mold board 43R and the road bed RB.
  • a center crown device 26 is mounted on the front side screed 30.
  • the center crown device 26 is a mechanism for expanding or contracting a turnbuckle mounted between the left front side screed 30L and the right front side screed 30R and adjusting the angle between the lower surface of the left front side screed 30L (left front side screed plate) and the lower surface of the right front side screed 30R (right front side screed plate) when viewed from the rear.
  • the center crown device 26 rotates the body of the turnbuckle to expand or contract the turnbuckle by rotating the hydraulic motor in response to a control command from the controller 50.
  • a slope crown device 27 is mounted between the front side screed 30 and the rear side screed 31.
  • the slope crown device 27 includes a left slope crown device 27L and a right slope crown device 27R. Specifically, the left slope crown device 27L is mounted between the left front side screed 30L and the left rear side screed 31L, and the right slope crown device 27R is mounted between the right front side screed 30R and the right rear side screed 31R.
  • the left slope crown device 27L expands and contracts the turnbuckle mounted between the left front side screed 30L and the left rear side screed 31L to adjust the angle between the lower surface of the left front side screed 30L (left front side screed plate) and the lower surface of the left rear side screed 31L (left rear side screed plate) when viewed from the rear.
  • the left slope crown device 27L rotates the body of the turnbuckle to expand or contract the turnbuckle by rotating the hydraulic motor in response to the control command from the controller 50.
  • the action similar to the above applies to the right slope crown device 27R.
  • a screed step 42 is a member that forms a scaffold when a worker works behind the screed 3.
  • a guide rail 1G is installed in an upper part of the tractor 1 so as to be used as a handrail by an operator of the asphalt finisher 100.
  • the operator of the asphalt finisher 100 includes the operator who operates the tractor 1 and an operator who operates the screed 3.
  • An information acquiring device 51 is attached to the guide rail 1G.
  • the information acquiring device 51 may be attached to a canopy or may be attached directly to the body of the tractor 1.
  • the information acquiring device 51 may be attached to the front side screed 30 or to the rear side screed 31.
  • the information acquiring device 51 is configured to obtain information about the surface of the pavement material PV compacted by the screed 3.
  • the information acquiring device 51 is a LIDAR configured to measure the distance to an object present around the asphalt finisher 100 and includes a space behind the screed 3 as a measurement range.
  • the LIDAR measurement range of the LIDAR is set to reliably detect the level difference that may be formed between a central pavement surface CP having a width W1 and a side pavement surface SP as illustrated in FIG. 2 , for example.
  • the side pavement surface SP includes a left side pavement surface LP having a width W2 and a right pavement surface RP having a width W3.
  • the level difference LD indicated by a solid line in FIG. 2 is an example of the level difference formed between the central pavement surface CP and the left side pavement surface LP.
  • the measurement range of the LIDAR is set to include, for example, a range of pavement surface having a width greater than the width of the front side screed 30 (i.e., the width W1 of the central pavement surface CP).
  • the LIDAR is configured to measure, for example, the distances between each of at least one million points in the measurement range and the LIDAR (reference point) .
  • Ranges Z0-Z2 indicated by dotted line in FIG. 2 represent three examples of the LIDAR measurement range of the LIDAR. In FIG. 2 , the range Z0 is illustrated far from the range Z1 and the range Z2 when viewed from the asphalt finisher 100 so as not to overlap the ranges Z1 and Z2 for clarity.
  • the positional relationship in the length direction of the ranges Z0 to Z2 in FIG. 2 does not represent the actual positional relationship. In practice, it is desirable that any of the ranges Z0-Z2 be positioned as close as possible to the asphalt finisher 100 as long as the level difference is detectable.
  • the range Z0 is set to include the full width of the new pavement NP, which is the pavement body laid by the asphalt finisher 100.
  • the range Z1 is configured to include a width that is wider than the width of the front side screed 30, but not the full width of the new pavement NP.
  • the range Z2 is set to include four independent ranges: a range Z2a, range Z2b, range Z2c, and range Z2d.
  • the range Z2a and range Z2b are arranged so that the level difference that may be formed between the central pavement surface CP and the left side pavement surface LP can be detected.
  • the range Z2c and range Z2d are arranged so that the level difference that can be formed between the central pavement surface CP and the right pavement surface RP can be detected.
  • the range Z2a is arranged so that the level difference (hereinafter, referred to as a "left outer side level difference") which may be formed by the left end of the left front side screed 30L can be detected.
  • the left outer side level difference is typically formed when the left side pavement surface LP is higher than the central pavement surface CP.
  • the range Z2b is arranged so that a step (hereinafter, a "left inside step") which may be formed by the right end of the left rear side screed 31L is detected.
  • the left inner side level difference is typically formed when the central pavement surface CP is higher than the left side pavement surface LP.
  • the range Z2c is arranged so that the level difference (hereinafter, a "right inner side level difference") that can be formed by the left end of the right rear side screed 31R can be detected.
  • the right inner side level difference step is typically formed when the central pavement surface CP is higher than the right pavement surface RP.
  • the range Z2d is arranged so that the level difference (hereinafter, a "right outer side level difference") that can be formed by the right end of the right front side screed 30R is detected.
  • the right outer side level difference is typically formed when the right pavement surface RP is higher than the central pavement surface CP.
  • the information acquiring device 51 may be a monocular camera, stereo camera, millimeter wave radar, ultrasonic sensor, laser radar, laser scanner, distance image camera, or laser rangefinder, or the like.
  • one information acquiring device 51 is installed in the asphalt finisher 100, but a plurality of the information acquiring devices 51 may be installed in the asphalt finisher 100.
  • the display device 52 is configured to display information about the asphalt finisher 100.
  • the display device 52 is a liquid crystal display located in front of a driver's seat 1S.
  • the communication device 53 is configured to control communication between the asphalt finisher 100 and a device located outside the asphalt finisher 100. In this embodiment, the communication device 53 is located in front of the driver's seat 1S.
  • FIG. 3 is a block diagram illustrating an example of the configuration of the screed raising and lowering system LS.
  • FIG. 4 is a cross-sectional view of the new pavement NP and illustrates a state in which the vertical plane including the single dotted line SE in FIG. 2 is viewed from the +X side.
  • the screed raising and lowering system LS mainly includes a center crown device 26, a slope crown device 27, a leveling cylinder 28, a screed raising and lowering device 29, a controller 50, an information acquiring device 51, a display device 52, and a communication device 53.
  • the controller 50 includes an information acquiring unit 50a, a crown device drive unit 50b, a leveling cylinder drive unit 50c, and a screed raising and lowering device driving unit 50d as functional elements.
  • the information acquiring unit 50a, the crown device drive unit 50b, the leveling cylinder drive unit 50c, and the screed raising and lowering device driving unit 50d are illustrated separately for convenience of explanation. However, these need not be physically distinguished and may be made with software or hardware components that are generally or partially shared.
  • the information acquiring unit 50a is configured to acquire information on the surface of the new pavement NP.
  • the information acquiring unit 50a measures the finished surface of the new pavement NP based on the output of the LIDAR as the information acquiring device 51.
  • the information acquiring unit 50a measures the finished shape of the surface of the new pavement NP using the local coordinate system and the reference coordinate system using the LIDAR as the center. That is, the information acquiring unit 50a converts the coordinates in the local coordinate system to the coordinates in the reference coordinate system and specifies the coordinates in the reference coordinate system corresponding to each point on the surface of the new pavement NP.
  • the reference coordinate system is, for example, a world geodetic coordinate system.
  • the world geodetic coordinate system is a three-dimensional orthogonal XYZ coordinate system having the origin at the center of the earth's gravity.
  • the X axis is set in the direction of the intersection of the Greenwich meridian and the equator, and the Y axis is set in the direction of 90 degrees east longitude, and the Z axis is set in the direction of the Arctic.
  • the information acquiring unit 50a is configured to measure the finished surface of the new pavement NP within the measurement range during the construction, that is, while the asphalt finisher 100 travels forward.
  • the information acquiring unit 50a sets a point on an artificial plane AP outside the width direction of the new pavement NP as a reference point R1.
  • the reference point R1 is set at the top of the L-shaped curb delimiting the new pavement NP.
  • the artificial plane AP may be another member such as a wooden frame used to separate the new pavement NP.
  • the information acquiring unit 50a may use a virtual point that is not present on the artificial plane AP as the reference point R1, such as a point that is vertically above the upper end of the curb by a predetermined height.
  • the information acquiring unit 50a detects the curb based on the output of the LIDAR and sets the upper end of the curb at a position at a predetermined distance in the X direction from the rear end of the asphalt finisher 100 as the reference point R1.
  • the information acquiring unit 50a sets a line parallel to the width direction (the Y-axis direction) of the new pavement NP passing through the reference point R1 as a virtual leveling line VS.
  • the virtual leveling line VS is typically the horizontal line through the reference point R1.
  • the information acquiring unit 50a derives the vertical distance between the surface of the new pavement NP and the virtual leveling line VS.
  • the information acquiring unit 50a sets a plurality of points on the virtual leveling line VS (in this case, for convenience, 19 points P1 to P19) to be equally spaced.
  • the points Q1-Q19 on the surface of the new pavement NP, which are located respectively and directly beneath the points P1-P19, are then specified.
  • the information acquiring unit 50a specifies the points Q1 to Q19 based on the distance between each point on the surface of the new pavement NP and the LIDAR output by the LIDAR.
  • the information acquiring unit 50a calculates the distance D1 between the points P1 and Q1.
  • the information acquiring unit 50a calculates the distance D1 based on the distance between the point P1 and the LIDAR output by the LIDAR and the distance between the point Q1 and the LIDAR also output by the LIDAR. Calculation similar to the above is applied to distances D2 to D19.
  • the information acquiring unit 50a may calculate the thickness of the new pavement NP corresponding to each of the distances D1 to D19 based on the height of the road bed RB derived from the reference point R1.
  • the points set on the virtual leveling line VS may be spaced unequally.
  • the number of points may be less than 19 and may be 20 or more.
  • the information acquiring unit 50a displays the measurement result of the distances D1 to D19 on the display device 52.
  • the information acquiring unit 50a displays the measurement results of the distances D1 to D19 on the display device 52 using a diagram.
  • the information acquiring unit 50a may display the measurement results of the distances D1 to D19 only with a numerical value or may display the results by a combination of a diagram and a numerical value.
  • the information acquiring unit 50a may be configured to display information on the measurement result only when it is determined that the measurement result is abnormal.
  • the information acquiring unit 50a may determine whether there is the level difference on the pavement surface based on the measurement result of the distance D1 to D19.
  • the information acquiring unit 50a determines that there is the level difference LD between the points P8 and P9 when the difference in the distance at each adjacent point (for example, the difference between the distance D9 with respect to the point P9 and the distance D8 with respect to the point P8) is equal to or more than a predetermined value.
  • the information acquiring unit 50a may display the determination result of the presence or absence of the level difference on the display device 52.
  • the information acquiring unit 50a may display information concerning the position of the level difference.
  • the information acquiring unit 50a may determine the presence or absence of a step by performing image processing on an image captured by the imaging device as the information acquiring device 51.
  • the imaging device may be, for example, a monocular camera, a stereo camera, an infrared camera, a distance image camera, or a LIDAR.
  • Image processing is, for example, binary processing, edge detection processing, and haff conversion processing.
  • the imaging range of an imaging device may include at least a range of pavement surfaces represented by the range Z2 illustrated in FIG. 2 .
  • the information acquiring unit 50a may transmit an operation result such as the measurement result of the distance D1 to D19 and the determination result of the presence or absence of the level difference to an external device.
  • the information acquiring unit 50a may transmit the calculation result to a management device such as a server installed in an external management center or to a support device such as a smartphone carried by a worker. This is in order to display information similar to that displayed on the display device 52 on a display device attached to the management device or the support device.
  • the information acquiring unit 50a may calculate the difference between the distance D1 and the ideal distance D1T corresponding to the distance D1 as irregularities on the surface of the new pavement NP and output the irregularities in size as the measurement result.
  • the ideal distance D1T is previously stored, for example, in a non-volatile storage device. If the distance D1 coincides with an ideal distance D1T, the height of the point on the surface of the new pavement NP corresponding to the distance D1 is equal to the reference height defined by the artificial plane AP. The same applies to the distances D2 to D19.
  • the information acquiring unit 50a may display the size of the irregularities corresponding to each of the distances D1 to D19 on the display device 52 together with the measurement results of the distances D1 to D19.
  • the information acquiring unit 50a may display the size of the irregularities corresponding to each of the distances D1 to D19 on the display device 52.
  • the information acquiring unit 50a may display the sizes of the irregularities in the display device 52 using a diagram and table.
  • the information acquiring unit 50a may display this fact on the display device 52.
  • the information acquiring unit 50a may output an alarm from a voice output device (not illustrated).
  • the controller 50 may display an image acquired by a camera (not illustrated) that is attached to the asphalt finisher 100 to capture the image behind the asphalt finisher 100 on a display device 52.
  • the information acquiring unit 50a may superimpose information concerning the measurement result of the distances D1 to D19 on the image acquired by the camera.
  • the information concerning the measurement result of the distance D1 to D19 may be, for example, a numeric value or a graphic shape representing the size of the irregularities, or a graphic shape representing the level difference, etc.
  • the information acquiring unit 50a may display, on the display device 52, a view representing at least one of a distribution of the size of the surface irregularities and the presence or absence of the level difference on the surface when the finished surface of the new pavement NP is continuously measured in the traveling direction (X-axis direction) of the asphalt finisher 100.
  • this view may include at least one of the graphic shapes in which a concave portion is represented by a red color and a convex portion is represented by a blue color, and a shape in which the level difference is represented by a straight line, in a state where the new pavement NP is viewed from a position directly above the new pavement NP.
  • the crown device drive unit 50b is configured to drive at least one of the center crown device 26 and the slope crown device 27.
  • the crown device drive unit 50b separately operates the center crown device 26 and the slope crown device 27 using a hydraulic pump, a hydraulic motor, a control valve, or the like.
  • the crown device drive unit 50b activates the center crown device 26 and the slope crown device 27 individually in response to a command from an operator of the asphalt finisher 100 via an input device (not illustrated).
  • the crown device drive unit 50b may activate the center crown device 26 and the slope crown device 27 individually and autonomously in response to a control command from the controller 50, independent of a command from the operator.
  • the leveling cylinder drive unit 50c is configured to drive the leveling cylinder 28.
  • the leveling cylinder drive unit 50c activates the leveling cylinder 28 using the hydraulic pump, the control valve, or the like. Specifically, the leveling cylinder drive unit 50c activates the leveling cylinder 28 in response to the command from the operator of the asphalt finisher 100 via the input device.
  • the leveling cylinder drive unit 50c may activate the leveling cylinder 28 autonomously in response to the control command from the controller 50, independent of the command by the operator.
  • the screed raising and lowering device driving unit 50d is configured to drive the screed raising and lowering device 29.
  • the screed raising and lowering device 29 is a mechanism that raises and lowers the rear side screed 31 to remove the level difference formed between the pavement surface compacted by the front side screed 30 and the pavement surface compacted by the rear side screed 31.
  • the removal of the level difference includes continuous preventions of the level differences detected by the controller 50 from being formed thereafter.
  • the level difference that has already been formed is removed, for example, using a leveling rake, load roller, or plate compactor.
  • the screed raising and lowering device driving unit 50d operates the screed raising and lowering device 29 using a hydraulic pump, a hydraulic motor, a control valve, or the like. Specifically, the screed raising and lowering device driving unit 50d operates the screed raising and lowering device 29 in response to a command via an input device by an operator of the asphalt finisher 100. The screed raising and lowering device driving unit 50d may operate the screed raising and lowering device 29 autonomously in response to a control command from the controller 50, apart from a command by an operator.
  • the operator viewing the measurement results of the distances D1-D19 displayed on the display device 52 may activate the center crown device 26 via the input device and the crown device drive unit 50b. This is for adjusting the angle between the lower surface of the left anterior screed plate and the lower surface of the right anterior screed plate as viewed from the rear.
  • the controller 50 may output a control command to the crown device drive unit 50b, for example, in a case where it detects that the thickness of a left side portion (+Y side portion) of the new pavement NP formed by the left rear side screed 31L is thickened outward.
  • the crown device drive unit 50b performs adjustment by the left slope crown device 27L in response to the control command from the controller 50.
  • the operator viewing the measured distances D1-D19 may activate not only the center crown device 26 or the slope crown device 27 but also the leveling cylinder 28 via the leveling cylinder drive unit 50c. This is because an adjustment using the leveling cylinder is more effective than an adjustment using the center crown device 26 and the slope crown device in adjusting the thickness of the new pavement NP.
  • the operator who sees the information indicating a presence of the level difference may activate the screed raising and lowering device 29 to remove the step.
  • the controller 50 may output the control command to the screed raising and lowering device driving unit 50d, for example.
  • the screed raising and lowering device driving unit 50d activates the screed raising and lowering device 29 in response to the control command from the controller 50 to remove the level difference.
  • the screed raising and lowering device driving unit 50d causes the left rear side screed 31L to rise and fall in order to remove the level difference formed between the pavement surface compacted by the left front side screed 30L and the pavement surface compacted by the left rear side screed 31L, for example, by operating the screed raising and lowering device 29.
  • the screed raising and lowering device driving unit 50d rotates a screed raising and lowering motor as the hydraulic actuator forming the screed raising and lowering device 29 in response to the control command from the controller 50 and drives a rotation-direct conversion mechanism attached to the left rear side screed 31L to cause the left rear side screed 31L to rise and fall.
  • the controller 50 may autonomously control at least one from among the center crown device 26, the slope crown device 27, the leveling cylinder 28, and the screed raising and lowering device 29.
  • the operator may manually control at least one from among the center crown device 26, the slope crown device 27, the leveling cylinder 28, and the screed raising and lowering device 29 while checking the contents displayed on the display device 52.
  • FIGS. 5A-5C a screen GX displayed on the display device 52 by the controller 50 will be described when the controller 50 detects the level difference formed between the central pavement surface CP and the side pavement surface.
  • FIGS. 5A-5C illustrate three display examples of the screen GX. Specifically, FIG. 5A illustrates the screen GX displayed in a case where a level difference formed by the right end of the left rear side screed 31L and the level difference formed by the right end of the right front side screed 30R are detected.
  • FIG. 5B illustrates the screed GX displayed when the level difference formed by a left end of the left front side screed 30L is detected.
  • FIG. 5C is the screen GX displayed when the level difference formed by a left end of the right rear side screed 31R is detected.
  • the screed GX illustrated in FIGS. 5A-5C includes, as a common graphic shape, a body graphic shape GM, a pavement material graphic shape GP, and a road surface graphic shape GR.
  • the body graphic shape GM represents the top view of the asphalt finisher 100.
  • the body graphic shape GM represents a top view of a portion existing behind the screw SC.
  • the pavement material graphic shape GP represents the top view of the pavement material PV before it is compacted by the screed 3.
  • the pavement material graphic shape GP is represented by a rough (thin) pearskin finish.
  • the road surface graphic shape GR represents the top view of the new pavement NP.
  • the road surface graphic shape GR is represented by a fine (dark) pearskin finish.
  • FIG. 5A includes graphic shapes G11, G12, G21, and G22.
  • the graphic shape G11 represents the left inner side level difference formed by the right end of the left rear side screed 31L.
  • the graphic shape G11 is represented by a thick dashed line.
  • the level difference LD indicated by the solid line in FIG. 2 is an example of the left inner side level difference.
  • the left inner side level difference is formed when the height of the pavement surface compacted by the left front side screed 30L is higher than the height of the pavement surface compacted by the left rear side screed 31L.
  • the graphic shape G12 represents a right outer side level difference formed by the right end of the right front side screed 30R.
  • the graphic shape G12 is indicated by a thick dashed line.
  • the right outer side level difference is formed in a case where the height of the pavement surface compacted by the right front side screed 30R is lower than the height of the pavement surface compacted by the right rear side screed 31R.
  • the graphic shape G21 is displayed in a case where the left inner side level difference is detected.
  • the graphic shape G21 is a bubble that includes character information regarding a measure that can be taken to remove the left inner side level difference and indicates the position of the graphic shape G11.
  • the graphic shape G21 can notify the operator of the asphalt finisher 100 that the left rear side screed 31L is raised autonomously by the controller 50, for example, by displaying text information such as "raising left side”.
  • the graphic shape G22 is displayed in a case where the right outer side level difference is detected.
  • the graphic shape G22 is a bubble containing character information regarding a measure that may be taken to remove the right outer side level difference and indicates the position of the graphic shape G12.
  • the graphic shape G22 can notify the operator of the asphalt finisher 100 that the right rear side screed 31R is lowered autonomously by the controller 50, for example, by displaying text information such as "lowering right side".
  • FIG. 5B includes graphic shapes G13 and G23.
  • the graphic shape G13 represents the left outer side level difference formed by the left end of the left front side screed 30L.
  • the graphic shape G13 is indicated by a thick dashed line.
  • the left outer side level difference is formed when the height of the pavement surface compacted by the left front side screed 30L is lower than the height of the pavement surface compacted by the left rear side screed 31L.
  • the graphic shape G23 is displayed when the left outer side level difference is detected.
  • the graphic shape G23 is a bubble containing character information regarding the measure that can be taken to remove the left outer side level difference and indicates the position of the graphic shape G13.
  • the graphic shape G23 can notify the operator of the asphalt finisher 100 that the left rear side screed 31L is lowered autonomously by the controller 50 by displaying text information such as "lowering left side", for example.
  • FIG. 5C includes graphic shapes G14 and G24.
  • the graphic shape G14 represents a right inner side level difference formed by the left end of the right rear side screed 31R.
  • the graphic shape G14 is indicated by a thick dashed line.
  • the right inner side level difference is formed when the height of the pavement surface compacted by the right front side screed 30R is higher than the height of the pavement surface compacted by the right rear side screed 31R.
  • the graphic shape G24 is displayed when the right inner side level difference is detected.
  • the graphic shape G24 is a bubble containing character information regarding a measure that may be taken to remove the right inner side level difference and indicates the position of the graphic shape G14.
  • the graphic shape G24 can notify the operator of the asphalt finisher 100 that the right rear side screed 31R is lowered autonomously by the controller 50 by displaying text information such as "raising right side", for example.
  • FIG. 6 is a flowchart of the height adjustment process.
  • the controller 50 performs this height adjustment process repeatedly with a predetermined control cycle, for example, when the asphalt finisher 100 is traveling forward.
  • the controller 50 determines whether there is a high level difference on the left side (step ST1).
  • the information acquiring unit 50a of the controller 50 determines whether or not there is a left outer side level difference based on the output of the LIDAR as the information acquiring device 51.
  • the controller 50 causes the left rear side screed 31L to fall (step ST2). This is to remove the left outer side level difference by causing the left side pavement surface LP that is higher than the central pavement surface CP to fall to adjust the height of the left side pavement surface LP to be the same as that of the central pavement surface CP.
  • the information acquiring unit 50a of the controller 50 outputs the control command for causing the left rear side screed 31L to fall to the screed raising and lowering device driving unit 50d.
  • the screed raising and lowering device driving unit 50d activates the left screed raising and lowering device 29L to cause the left rear side screed 31L to fall in response to the control command from the information acquiring unit 50a.
  • the controller 50 determines whether there is a level difference high on the left inner side (step ST3).
  • the information acquiring unit 50a of the controller 50 determines whether there is a left inner side level difference based on the output of the LIDAR as the information acquiring device 51.
  • the controller 50 raises the left rear side screed 31L (step ST4). This is to remove the left inner side level difference by causing the left side pavement surface LP that is lower than the central pavement surface CP to rise that the height of the left side pavement surface LP coincides with the height of the central pavement surface CP.
  • the information acquiring unit 50a of the controller 50 outputs a control command for raising the left rear side screed 31L to the screed raising and lowering device driving unit 50d.
  • the screed raising and lowering device driving unit 50d activates the left screed raising and lowering device 29L in response to the control command from the information acquiring unit 50a to cause the left rear side screed 31L to rise.
  • the controller 50 may be configured to determine whether there is a left outer side level difference after determining whether there is a left inner side level difference.
  • the controller 50 determines whether there is a high right outer side level difference (step ST5).
  • the information acquiring unit 50a of the controller 50 determines whether there is a right outer side level difference based on the output of the LIDAR as the information acquiring device 51.
  • the controller 50 lowers the right rear side screed 31R (step ST6). This is to remove the right outer side level difference by causing the right pavement surface RP to fall such that the height of the right pavement surface RP coincides with the height of the central pavement surface CP.
  • the information acquiring unit 50a of the controller 50 outputs the control command to the screed raising and lowering device 29R to cause the screed raising and lowering device driving unit 50d such that the right rear side screed 31R is lowered.
  • the screed raising and lowering device driving unit 50d activates the screed raising and lowering device 29R to cause the right rear side screed 31R to fall in response to the control command from the information acquiring unit 50a.
  • the controller 50 determines whether there is a level difference high on the right inner side (Step ST7).
  • the information acquiring unit 50a of the controller 50 determines whether there is a right inner side level difference based on the output of the LIDAR as the information acquiring device 51.
  • the controller 50 rises the right rear side screed 31R (step ST8). This is to remove the right inner side level difference by causing the right pavement surface RP that is lower than the central pavement surface CP to raise such that the height of the right pavement surface RP coincides with the height of the central pavement surface CP.
  • the information acquiring unit 50a of the controller 50 outputs the control command for raising the right rear side screed 31R to the screed raising and lowering device driving unit 50d.
  • the screed raising and lowering device driving unit 50d activates the right screed raising and lowering device 29R in response to the control command from the information acquiring unit 50a to cause the right rear side screed 31R to rise.
  • the controller 50 may be configured to determine whether there is a left outer side level difference after determining whether there is a right inner side level difference.
  • the controller 50 may determine the presence or absence of the left inner side level difference and left outer side level difference, respectively.
  • the controller 50 may independently determine the presence or absence of the left inner side level difference, the left outer side level difference, the right inner side level difference, and the right outer side level difference according to a desired order.
  • the controller 50 can prevent the level difference formed between the central pavement surface CP and the side pavement surface SP from continuing over a long distance.
  • FIGS. 7A-7D are side views of the screed 3 and the new pavement NP when viewed from the +Y side of FIG. 2 .
  • FIGS. 7A-7D omit most of the illustrations of the screed 3 except for a left front side screed plate 30LP of the left front side screed 30L and a left rear side screed plate 31LP of the left rear side screed 31L for clarity.
  • the following description is applicable in a manner similar thereto to cases where the left rear side screed 31L is caused to rise, the left rear side screed 31L is caused to fall, the right rear side screed 31R is caused to fall, and the right rear side screed 31R is caused to fall.
  • FIG. 7A is a diagram illustrating when the controller 50 detects the level difference LD and starts raising of the left rear side screed 31L.
  • FIG. 7B is a diagram when the controller 50 causes the left rear side screed 31L to rise.
  • FIG. 7C is a diagram when the controller 50 ends raising of the left rear side screed 31L.
  • FIG. 7D is a view in a case where the pavement surface without the level difference is formed.
  • the left screed raising and lowering device 29L is activated to start the rise of the left rear side screed 31L in the direction indicated by the arrow AR1.
  • the magnitude of the level difference LD corresponding to the difference between the height of the rear end of the left front side screed plate 30LP and the height of the rear end of the left rear side screed plate 31LP is a value DP1.
  • the angle of attack ⁇ of the left rear side screed plate 31LP is greater than the angle of attack ⁇ of the left front side screed plate 30LP.
  • the controller 50 continues to raise the left rear side screed 31L in the direction indicated by the arrow AR2 until the height of the rear end of the left front side screed plate 30LP coincides with the height of the rear end of the left rear side screed plate 31LP.
  • the controller 50 raises the left rear side screed 31L at a predetermined rise rate regardless of the value DP1, which is the size of the level difference LD when the left rear side screed 31L starts to rise.
  • the controller 50 may determine the target rise speed and target rise width based on the value DP1.
  • the magnitude of the level difference LD is a value DP2 that is smaller than the value DP1.
  • the controller 50 stops raising the left rear side screed 31L as illustrated in FIG. 7C when a rise value of the left rear side screed 31L reaches a target rise value.
  • the level difference LD is removed when the length in the X-axis reaches the value L1. At the time of FIG. 7C , the magnitude of the level difference LD is zero.
  • the controller 50 then maintains the height of the left rear side screed 31L when the rise of the left rear side screed 31L is stopped. As a result, as illustrated in FIG. 7D , the asphalt finisher 100 can form a pavement surface without the level difference.
  • the asphalt finisher 100 can automatically detect the level difference formed between the central pavement surface CP and the side pavement surface SP and causes the rear side screed 31 to rise and fall autonomously so that the level difference is removed. Therefore, it is possible to prevent the length of the level difference in the traveling direction from being excessive. As a result, the asphalt finisher 100 can increase work efficiency by reducing the work to remove the level difference that has already been formed.
  • the asphalt finisher 100 may also form pavement that has less level difference regardless of the operator's skill in a manual operation of the screed raising and lowering device 29. Thus, the asphalt finisher 100 can maintain the quality of the pavement to be formed above a certain level.
  • the asphalt finisher 100 includes the tractor 1, the hopper 2 installed on the front side of the tractor 1 for receiving pavement material, the conveyor CV for feeding the pavement material in the hopper 2 to the rear side of the tractor 1, the screw SC for spreading the pavement material fed by the conveyor CV on the rear side of the tractor 1, the screed 3 for compacting the pavement material spread by the screw SC on the rear side of the screw SC, the information acquiring device 51 for acquiring information on the surface of the pavement material compacted by the screed 3, and the controller 50 as a controlling device.
  • the screed 3 includes a front side screed 30 and a rear side screed 31 which are displaced in the vehicle length direction.
  • the controller 50 is configured to determine whether there is the level difference formed between the surface of the pavement material that is compacted by the front side screed 30 and the surface of the pavement material that is compacted by the rear side screed 31 based on the information acquired by the information acquiring device 51.
  • the asphalt finisher 100 can detect that the level difference has been formed in an early stage, the quality of the pavement surface to be formed can be prevented from being degraded.
  • the information acquiring device 51 is preferably mounted on a canopy or the tractor 1. With this configuration, the asphalt finisher 100 can increase the precision of measuring the finished surface of the new pavement NP. This is because both the canopy and the tractor 1 have low vibrations compared to the screed 3. However, the information acquiring device 51 may be mounted on the screed 3. In this case, the information acquiring device 51 can obtain the information regarding the surface of the pavement material at a position near the surface of the pavement material compacted by the screed 3.
  • the asphalt finisher 100 desirably includes the controller 50 that, based on the output of the information acquiring device 51, calculates the irregularities of the surface of the road surface relative to the reference height defined by the artificial plane AP or determines the presence or absence of the level difference.
  • the asphalt finisher 100 can easily and independently measure the finished surface of the new pavement NP or easily and independently determine the presence or absence of the level difference on the surface of the new pavement NP even if the asphalt finisher 100 is not connected to another device.
  • the information acquiring device 51 may also be used to implement another function such as rear monitoring.
  • the operator of the asphalt finisher 100 can intuitively grasp the state of the finished surface of the new pavement NP by viewing information on the irregularities relative to the standard height on the surface of the new pavement NP.
  • the asphalt finisher 100 preferably includes a display function for displaying the results of the calculation obtained by the controller 50.
  • the display function is performed by the display device 52 mounted in the asphalt finisher 100, a display device attached to a management device such as a computer installed in an external management center, or a display device attached to a support device such as a smartphone carried by a worker.
  • the asphalt finisher 100 can communicate information about the new pavement NP to an operator of the asphalt finisher 100, or to a person concerned, such as an operator of the asphalt finisher 100 working around the asphalt finisher 100.
  • the asphalt finisher 100 may include a front side screed raising and lowering device that causes the front side screed 30 to rise and fall, in addition to the screed raising and lowering device 29 that causes the rear side screed 31 to rise or fall.
  • the asphalt finisher 100 may be configured to cause the left front side screed 30L and the right front side screed 30R separately to rise and fall.
  • the controller 50 is configured to automatically detect the level difference and cause the rear side screed 31 to rise and fall to autonomously remove the level difference.
  • the controller 50 may be configured to prompt the operator to cause the rear side screed 31 to rise and fall after notifying the operator that the level difference has been detected.
  • the controller 50 may use at least one of sound, light, vibration, and the like to assist the operator in manually operating the screed raising and lowering device 29.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
EP20782568.8A 2019-03-29 2020-03-24 Dispositif de finition d'asphalte Withdrawn EP3951061A4 (fr)

Applications Claiming Priority (2)

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JP2019066680 2019-03-29
PCT/JP2020/013072 WO2020203475A1 (fr) 2019-03-29 2020-03-24 Dispositif de finition d'asphalte

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Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6085105A (ja) * 1983-10-13 1985-05-14 酒井重工業株式会社 路面再舗装装置
JPH077368Y2 (ja) * 1990-11-13 1995-02-22 株式会社新潟鐵工所 アスファルトフィニッシャにおける施工監視装置
JPH0749647B2 (ja) * 1990-11-14 1995-05-31 株式会社新潟鐵工所 敷均し機械における舗装厚の表示方法
JP2834008B2 (ja) * 1994-10-17 1998-12-09 新キャタピラー三菱株式会社 アスファルトフィニッシャにおけるスクリード高さ制御方法およびその装置
JP2000144626A (ja) * 1998-11-12 2000-05-26 Tokimec Inc 舗装厚さ制御装置
JP3383908B2 (ja) * 1999-06-15 2003-03-10 住友建機製造株式会社 アスファルトフィニッシャ等の道路舗設車両のスクリード装置
US20020110419A1 (en) * 2001-02-15 2002-08-15 Robert Batty Height control arrangement for a strike-off plate
JP2002339314A (ja) * 2001-05-14 2002-11-27 Topcon Corp アスファルトフィニッシャの舗装厚制御装置及びアスファルトフィニッシャ及び舗装施工システム
US7172363B2 (en) * 2004-08-31 2007-02-06 Caterpillar Paving Products Inc Paving machine output monitoring system
PL2325390T5 (pl) * 2009-10-20 2019-12-31 Joseph Vögele AG Deska równająca i zespół maszynowy do budowy dróg
DE102010004785A1 (de) * 2009-11-24 2011-05-26 Dynapac Gmbh Verfahren und Straßenfertiger zur Herstellung eines Straßenbelags
EP2366831B1 (fr) * 2010-03-18 2014-12-24 Joseph Vögele AG Procédé de commande du procédé lors de la application d'un revêtement routier et finisseuse de route
US9004811B2 (en) * 2012-02-24 2015-04-14 Caterpillar Paving Products Inc. Systems and methods for aiming asphalt material feed sensors
JP6419521B2 (ja) * 2014-10-10 2018-11-07 住友建機株式会社 道路機械
EP3130939A1 (fr) * 2015-08-13 2017-02-15 Joseph Vögele AG Finisseuse de route dotée d'un dispositif d'égalisation par radar et procédé de commande
JP6668114B2 (ja) 2016-03-08 2020-03-18 住友建機株式会社 アスファルトフィニッシャ
CN106087667A (zh) * 2016-08-15 2016-11-09 徐工集团工程机械股份有限公司道路机械分公司 “品”字形伸缩熨平板段差自动调整控制装置及其方法
CN106939544B (zh) * 2017-05-04 2019-02-19 徐州工业职业技术学院 一种用于摊铺机熨平板高度差的调节装置
JP7146767B2 (ja) * 2017-08-08 2022-10-04 住友建機株式会社 道路機械
JP6909695B2 (ja) 2017-10-02 2021-07-28 株式会社小糸製作所 波長変換部材および光源モジュール
CN112437824B (zh) * 2018-08-01 2023-02-28 住友建机株式会社 沥青滚平机及道路机械的管理装置

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JPWO2020203475A1 (fr) 2020-10-08
JP7410931B2 (ja) 2024-01-10
CN113924395A (zh) 2022-01-11
EP3951061A4 (fr) 2022-06-01

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