Uneven roll for construction machine

Abstract

To provide an uneven roll for a construction machine used for a construction machine for laying and leveling an asphalt mixture, capable of collectively performing a laying and leveling step and a grooving step of the asphalt mixture for an asphalt-paved road, and capable of forming grooves similar to horizontal grooving.SOLUTION: An uneven roll 30 for the construction machine is attached to the construction machine 10, and includes arm parts 31 respectively provided at both ends in a vehicle width direction of a screed mechanism 20 and extending to a vehicle rear side, and a roll body 41 of a telescopic structure rotatably provided between the arm parts 31 and expandable in the vehicle width direction, and a groove forming projection part 42 provided at a predetermined interval in the outer peripheral direction of the roll body 41, extending in the vehicle width direction, projecting in the outer diameter direction, and biting into the asphalt mixture 50 laid and leveled by the screed mechanism 20 to form a groove 51.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a concave-convex roll for a construction machine that is provided on a construction machine for spreading and leveling an asphalt mixture. [Background technology]

[0002] A method known as a grooving method has been commonly used for asphalt-paved roads and the like, in which grooves are created in the surface of the road to prevent vehicles from slipping. Patent Document 1 discloses an example of such an asphalt pavement method, and Patent Document 2 discloses an example of a grooving method.

[0003] The technology in Patent Document 1 involves mixing asphalt with aggregates such as crushed stone and sand, heating the asphalt mixture, and then spreading it evenly over the roadbed using an asphalt finisher, which is a construction machine.When spreading and leveling the asphalt mixture, a traveling laser oscillator installed on the roadbed emits a scanning laser beam, and this laser beam is detected by an optical position detector installed in the asphalt finisher to control the roadbed level.The spread and leveled asphalt mixture is then compacted using a road roller or the like, and the heat is released (cooled) to form an asphalt-paved road.

[0004] The technology of Patent Document 2 involves using a road surface processing machine to groove the surface of a completed asphalt-paved road. The road surface processing machine is equipped with a rotary drive source within the vehicle body, and a pair of bearings are attached to the vehicle body to selectively support a cutting drive shaft and a grooving drive shaft, the cutting drive shaft being a drive shaft that rotates one cutter blade, and the grooving drive shaft being a drive shaft that rotates multiple grooving blades. When the grooving drive shaft is attached to the pair of bearings, multiple grooves can be formed in the road surface using multiple grooving blades.

[0005] However, in the techniques of Patent Document 1 and Patent Document 2, the asphalt paving process and the grooving process are separate, and two stages of construction are required to obtain a grooved asphalt pavement road. Furthermore, with the technique of Patent Document 2, it is necessary to collect and clean the waste material after the grooving work, which requires the introduction of dedicated cutting machines, waste material collection machines, and cleaning machines. This increases the effort and cost of construction and waste material disposal. The technique of Patent Document 3 is known as a technique that eliminates this increase in effort and cost.

[0006] The technology of Patent Document 3 is a paving groove forming tool that performs vertical grooving (grooving along the direction in which the road extends). The paving groove forming tool (screed device) installed on an asphalt finisher is formed from multiple beam members arranged in parallel on the underside of the screed device, with the direction of travel of the screed device as the axial direction, so that when leveling the pavement surface, the screed device's own weight pushes it into the leveled surface, and the multiple beam members are arranged in series in the axial direction on the underside of the same screed device.

[0007] However, with the technology of Patent Document 3, when leveling a pavement surface with an asphalt finisher, the beam member is pushed into the leveling surface by the weight of the screed device, and while the beam member is pushed into the leveling surface, it moves in the direction of travel of the screed device, which may cause the beam member to drag the walls of the vertical grooves, causing the grooves to collapse. Also, on asphalt-paved roads, horizontal grooving (grooving perpendicular to the direction the road extends) may be required depending on the location, and the technology of Patent Document 3 does not allow for horizontal grooving. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Publication No. 62-101704 [Patent Document 2] Patent No. 6175533 [Patent Document 3] Patent No. 6362718 Summary of the Invention [Problem to be solved by the invention]

[0009] In view of the above, an object of the present invention is to provide a concave-convex roll for construction machinery that can be used in construction machinery that spreads and levels asphalt mixtures, that can perform the asphalt mixture spreading and grooving processes in one go, and that can create grooves similar to horizontal grooving. [Means for solving the problem]

[0010] According to an embodiment of the present invention, there is provided a construction machine uneven roll provided on a construction machine that spreads and levels an asphalt mixture, The construction machine is equipped with a screed mechanism that spreads and levels the asphalt mixture and can expand and contract in the vehicle width direction to change the leveling width, The uneven roll for construction machinery is characterized by comprising arm portions provided at both ends of the screed mechanism in the vehicle width direction and extending toward the rear of the vehicle, a roll body with a telescopic structure that is rotatably provided between the arm portions and can be extended and contracted in the vehicle width direction, and groove-forming convex portions that are provided at a predetermined interval around the outer periphery of the roll body, extend in the vehicle width direction, and protrude in the outer diameter direction, digging into the asphalt mixture spread and leveled on the screed mechanism to form grooves.

[0011] According to this configuration, the construction machine is equipped with a screed mechanism that spreads and levels the asphalt mixture and can expand and contract in the vehicle width direction to change the spread width. The uneven roll for construction machinery is equipped with a roll body with a telescopic structure that is rotatably mounted between arms fixed to the screed mechanism and is expandable and contractible in the vehicle width direction, so that the width of the roll body also changes in response to changes in the width of the screed mechanism. As the uneven roll for construction machinery rotates, the groove-forming convex portions, which are provided at predetermined intervals around the outer periphery of the roll body, extend in the vehicle width direction, and protrude in the outer diameter direction, penetrate into the unhardened asphalt mixture immediately after it has been spread and leveled by the screed mechanism, forming grooves. This allows the asphalt mixture spreading and grooving processes for asphalt pavement roads to be carried out simultaneously, and grooves similar to horizontal grooving to be formed.

[0012] Preferably, the groove-forming protrusions are arranged at intervals of 1 cm or more and 15 cm or less in the outer circumferential direction of the roll body.

[0013] If the groove spacing on an asphalt pavement road were less than 1 cm, the width supporting the surface layer would be narrow, reducing the durability of the surface layer, while if the groove spacing were greater than 15 cm, the groove spacing would be too large, reducing the vehicle's ability to prevent slippage. In this regard, according to the configuration of the present invention, the spacing between the groove-forming protrusions in the circumferential direction of the roll body is between 1 cm and 15 cm, making it possible to form lateral grooves at various spacings while maintaining the durability and anti-slip performance of the surface layer.

[0014] Preferably, the groove-forming convex portion is detachably provided on the roll body, When viewed in cross section, the shape is rectangular, triangular, trapezoidal, or arc-shaped.

[0015] With this configuration, the groove-forming protrusions are detachably attached to the roll body, so worn groove-forming protrusions can be replaced without replacing the roll body, reducing parts costs, and the paving and grooving processes can be performed simultaneously, while creating grooves similar to horizontal grooving. Furthermore, the groove-forming protrusions are rectangular, triangular, trapezoidal, or arc-shaped in cross section, so horizontal grooves required depending on the road surface conditions can be created.

[0016] Preferably, supports are arranged along the road at widthwise ends of the road to be paved with asphalt, The roll body may be provided at its end in the width direction with a support wheel that is formed to have a diameter equal to or smaller than the diameter of the roll body and that rolls on the support during construction. Examples of the support include a support body, an existing or new pavement, an existing or new street gutter, and other structures.

[0017] Generally, when performing asphalt paving, if there are no paving bodies or structures on both sides of the paving area in the width direction, supports such as supports are placed. With this configuration, the ends of the roll body in the vehicle width direction are equipped with support wheels that are formed with a diameter equal to or smaller than the diameter of the roll body and that roll on the supports during construction. Therefore, by utilizing the supports and the support wheels that roll on the supports during construction, the main roll can be maintained at an appropriate height, allowing for the creation of horizontal grooves with good depth.

[0018] Preferably, the arm portion is swingably provided on the screed mechanism, The groove-forming convex portions bite into the asphalt mixture due to the weight of the uneven roll for construction machinery, forming grooves.

[0019] With this configuration, the arm is swingably mounted on the screed mechanism, and the weight of the uneven roll for construction machinery causes the groove-forming convex portions to bite into the asphalt mixture, forming grooves. This allows grooves to be formed with a simple mechanism, while the roll body presses down on the road surface, improving road surface conditions. Furthermore, even when the road surface transitions from a flat area to a slope, the arm swings automatically, allowing grooves of an appropriate depth to be formed.

[0020] Preferably, the arm portion includes an angle adjustment mechanism for changing the angle of the extension direction relative to the screed mechanism.

[0021] According to this configuration, the arm unit is equipped with an angle adjustment mechanism that changes the angle of the extension direction relative to the screed mechanism. By adjusting the angle of the arm unit, the height and pressure of the uneven roll for construction machinery relative to the road surface can be adjusted, making it possible to appropriately form groove depth and road surface conditions. Furthermore, even if the road surface changes from a flat area to a slope, the angle adjustment mechanism can be used to adjust the angle of the arm unit to form a groove of appropriate depth. [Effects of the Invention]

[0022] It is possible to provide a rough roll for construction machinery that is used in construction machinery that spreads and levels asphalt mixtures, and that performs the spreading and grooving processes of asphalt mixtures for asphalt-paved roads in one go, and that creates grooves similar to horizontal grooving. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a perspective view of a construction machine (asphalt finisher) to which a concave-convex roll for a construction machine according to an embodiment is attached. [Figure 2] Fig. 2(A) is a rear view of a screed mechanism to which a concave-convex roll for a construction machine according to an embodiment is attached, and Fig. 2(B) is a bottom view of the screed mechanism to which a concave-convex roll for a construction machine according to an embodiment is attached. [Figure 3]Fig. 3(A) is a perspective view of a main part of the uneven roll for construction machinery according to the embodiment when the width thereof is extended, Fig. 3(B) is a perspective view of a main part of the uneven roll for construction machinery according to the embodiment when the width thereof is reduced, and Fig. 3(C) is a side view of the uneven roll for construction machinery according to the embodiment. [Figure 4] Fig. 4(A) is a diagram for explaining the intervals between groove-forming convex portions according to the embodiment, and Fig. 4(B) is a diagram showing the operation of groove formation in the uneven roll for construction machinery according to the embodiment. [Figure 5] Fig. 5(A) is a diagram illustrating the operation of removing a groove-forming convex portion according to an embodiment, Fig. 4(B) is a diagram illustrating the operation of attaching a groove-forming convex portion according to an embodiment, and Fig. 5(C) is a diagram illustrating groove-forming convex portions of various shapes. [Figure 6] Fig. 5(A) is a diagram showing the operation of the swingable arm portion, and Fig. 5(B) is a diagram showing the operation of the arm portion provided in the angle adjustment mechanism. [Figure 7] Fig. 7(A) is an explanatory view of a support wheel according to an embodiment, and Fig. 7(B) is an explanatory view of a support wheel of another embodiment. [Figure 8] Fig. 8(A) is an operational diagram of an asphalt finisher according to a comparative example. Fig. 8(B) is an operational diagram of a dedicated cutting machine according to a comparative example. Fig. 8(C) is an operational diagram of an asphalt finisher equipped with a concave-convex roll for construction machinery according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0024] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following describes an embodiment of the present invention with reference to the accompanying drawings, which conceptually (schematically) illustrate a construction machine and a concave-convex roll for a construction machine. [Example]

[0025] As shown in Figure 1, construction machine 10 equipped with uneven roll 30 for construction machine is an asphalt finisher that spreads and levels asphalt mixture 50. Construction machine 10 is equipped with tractor 11 as the main body, wheels 12 for traveling provided on tractor 11, a driver's seat 13 for an operator to drive and perform various operations, a hopper 14 into which heated asphalt mixture 50 made by mixing asphalt with aggregate such as crushed stone or sand is poured from a dump truck 70 (see Figure 8), and a bar feeder 15 that transports the poured asphalt mixture 50 to the rear of the vehicle.

[0026] The construction machine 10 also includes a screw 16 that is mounted behind the tractor 11 and spreads the asphalt mixture 50 evenly across the paving width, a tamper 17 that is mounted behind the screw 16 and compacts the asphalt mixture 50, a leveling arm 21 that is mounted on the tractor 11 in an angle-adjustable manner and extends rearward, a screed mechanism 20 that is mounted on the leveling arm 21 and spreads and levels the compacted asphalt mixture 50, and a construction machine uneven roll 30 that is mounted on the screed mechanism 20 via an arm portion 31 and forms grooves that extend in the width direction of the road in the spread and leveled asphalt mixture (surface layer) 50.

[0027] Next, the screed mechanism 20 will be described. As shown in Figures 1 and 2, the screed mechanism 20 is a mechanism that spreads and levels the asphalt mixture 50 and can expand and contract in the vehicle width direction to change the leveling width.It is equipped with a screed 22 that directly spreads and levels the asphalt mixture 50 that has been compacted by the tamper 17, and a step 23 that is located behind the screed 22 and on which an operator can stand.

[0028] The screed 22 also includes a central screed 22a fixed to the center of the vehicle width direction, and a side screed 22b arranged to the side of the central screed 22a and extending and retracting (moving in the vehicle width direction) as the width of the entire screed mechanism 20 changes.

[0029] The screed mechanism 20 is supported by the tractor 11.

[0030] When the screed mechanism 20 extends in the width direction as indicated by arrow (1), the uneven roll for construction machinery 30 also extends in the width direction as indicated by arrow (2). Similarly, the screw 16, screed 22, and step 23 also extend in the width direction. As a result, the width of the screed mechanism 20 in the vehicle width direction can be changed depending on the width of the road to be asphalt paved, for example, to width W1 if the road is narrow, or to width W2 if the road is wide.

[0031] Next, the uneven roll 30 for construction machinery will be described. As shown in Figures 1 to 4, the uneven roll 30 for construction machinery comprises arm portions 31 of length L1 that are provided at both ends of the screed mechanism 20 in the vehicle width direction and extend toward the rear of the vehicle, a roll body 41 with a telescopic structure that is rotatably provided between these arm portions 31 via a rotating shaft 32 and can expand and contract in the vehicle width direction, and groove-forming protrusions 42 that are provided around the outer periphery of the roll body 41 at a predetermined interval L2, extend in the vehicle width direction, and protrude in the outer diameter direction so as to dig into the asphalt mixture 50 spread and leveled on the screed mechanism 20 and form grooves.

[0032] Furthermore, when the screed mechanism 20 contracts in the vehicle width direction, the side rolls 41b move as shown by arrow (3) and are stored in the central roll 41a, which is formed as a hollow with both ends in the vehicle width direction open and comprising the roll main body 41. Furthermore, the insides of the groove forming protrusions 42 provided on the main roll 41 are also formed as hollow with both ends in the vehicle width direction open, so that the groove forming protrusions 42 provided on the side rolls 41b are stored inside the groove forming protrusions 42 provided on the central roll 41a.

[0033] In the embodiment, the side rolls 41b are accommodated in the central roll 41a, but the present invention is not limited to this, and the central roll 41a may be accommodated in the side rolls 41b. The distance from the rear end of the screed mechanism 20 (the rear end of the step 23) to the groove forming protrusions 42 provided on the main roll 41 may be 1 cm to 200 cm, and more preferably 10 cm to 100 cm.

[0034] As shown in FIG. 4 , the interval L2 at which the groove-forming protrusions 42 are arranged in the circumferential direction of the roll body 41 is 1 cm or more and 15 cm or less. If the interval between grooves formed on an asphalt pavement road is less than 1 cm, the width supporting the surface layer will be narrow, reducing the durability of the surface layer. If the interval between grooves is greater than 15 cm, the groove interval will be too large, reducing the vehicle's anti-skid ability. In this regard, according to the embodiment of the present invention, the interval L2 at which the groove-forming protrusions are arranged in the circumferential direction of the roll body can be changed to form lateral grooves 51 with various intervals L2 while maintaining the durability and anti-skid ability of the surface layer. Note that, although the groove-forming protrusions 42 are welded to the roll body 41, this is not limiting and the groove-forming protrusions 42 may be integrally formed with the roll body 41.

[0035] As shown in Figure 5, the groove forming protrusions 42 are detachably attached to the roll body 41 by fastening members 43. The height of the groove forming protrusions 42 in the protruding direction is L3. The groove forming protrusions 42 can be removed by removing the fastening members 43. Furthermore, if the groove forming protrusions 42 become worn, they can be replaced with new groove forming protrusions 42.

[0036] The groove forming protrusions 42 are rectangular in cross section. In the embodiment, the groove forming protrusions 42 are rectangular in cross section, but are not limited thereto, and may be triangular, trapezoidal, arc-shaped, or other shapes in cross section to form horizontal grooves 51 required depending on the road surface conditions.

[0037] The cross-sectional width of the groove forming protrusion 42 is 2 mm to 40 mm, and the protrusion height L3 is 2 mm to 40 mm.

[0038] Next, the arm portion 31 will be described. As shown in Figure 6(A), the arm portion 31 is attached to the screed mechanism 20 (see Figure 1) via an attachment portion 31a and is provided so as to be able to swing about a swing axis 33. This allows the groove-forming convex portions 42 to dig into the asphalt mixture 50 and form grooves 51 due to the weight of the uneven roll for construction machinery 30.

[0039] 6(B), the arm unit 31 may be attached to the screed mechanism 20 via an attachment portion 31a, and may further include an angle adjustment mechanism 34 for changing the angle of the extension direction relative to the screed mechanism 20. This allows the angle of the arm unit 31 to be adjusted, and the height and pressure of the uneven roll for construction machinery 30 relative to the road surface 52 (see FIGS. 4 and 8(C)) to be adjusted, thereby making it possible to appropriately form the depth of the groove 51 and the condition of the road surface 52. Furthermore, even when the road surface 52 transitions from a flat area to a slope, it is possible to form a groove 51 of an appropriate depth by adjusting the angle of the arm unit 31.

[0040] Next, the support wheel 44 will be described. As shown in Figures 1 and 7(A), generally, during construction, supports 60 are placed along the widthwise ends of the road to which asphalt pavement is applied. The roll body 41 of the uneven roll 30 for construction machinery is provided at its widthwise end with a support wheel 44 that is formed to have a diameter equivalent to (the same as) the diameter of the roll body 41 and rolls on the support 60 during construction.

[0041] This allows the support 60 to be used, and the support wheel 44 that rolls on the support 60 during construction maintains the proper height of the main roll 41, allowing horizontal grooves 51 with good depth to be formed.

[0042] Next, an alternative support wheel 44 will be described. As shown in Figure 7(B), a support 60 is placed along the road at the widthwise end of the road to be asphalt paved, and another support 60a is placed on the road edge (soil, etc.) 53 outside the support 60. The other support 60a is placed on the road edge (soil, etc.) 53 at a distance that does not interfere with the support 60 along the road. The roll body 41 of the uneven roll 30 for construction machinery is provided at the vehicle widthwise end with a support wheel 44 that is formed with a diameter smaller than the diameter of the roll body 41 and rolls on the support 60a during construction.

[0043] Next, the grooving of the comparative example described above will be explained. First, as shown in Figure 8(A), in the asphalt finisher 100 of the comparative example, the asphalt mixture 50 carried by the dump truck 70 is poured into a hopper 101, and the asphalt mixture 50 is spread evenly on the roadbed 61 with a screed 104. Next, as shown in Figure 8(B), a dedicated cutting machine 110 of the comparative example is used to cut the hardened asphalt mixture 50 (surface layer) with a cutting blade 111 to form grooves (grooving).

[0044] As described above, in the comparative example, the asphalt paving process and the grooving process are separate, and two stages of construction are required to obtain a grooved asphalt pavement road. Also, in the comparative example, after the grooving work, the waste material needs to be collected and cleaned up, so it is necessary to introduce dedicated cutting machines, waste material collection machines, and cleaning machines, which increases the effort and cost of construction and waste material disposal.

[0045] Next, the operation of the uneven roll 30 for construction machinery according to the embodiment described above will be explained. As shown in Figure 8(C), in the asphalt finisher 10 equipped with the uneven roll 30 for construction machinery of the embodiment, the asphalt mixture 50 carried by the dump truck 70 is poured into the hopper 14, and the asphalt mixture 50 is spread evenly on the roadbed 61 by the screed mechanism 20. At this time, as the asphalt finisher 10 moves forward, grooves (horizontal grooves) 51 are formed in the asphalt mixture 50 by the uneven roll 30 for construction machinery.

[0046] Next, the effects of the uneven roll 30 for construction machinery according to the embodiment described above will be explained. In an embodiment of the present invention, a construction machine 10 is equipped with a screed mechanism 20 that can spread and level an asphalt mixture 50 and can expand and contract in the vehicle width direction to change the leveling width. The uneven roll 30 for construction machinery is equipped with a roll body 41 with a telescopic structure that is rotatably mounted between arms 31 fixed to the screed mechanism 20 and is expandable and contractible in the vehicle width direction, so that the width of the roll body 41 also changes as the width of the screed mechanism 20 is changed. As the uneven roll 30 for construction machinery rotates, groove-forming protrusions 42 that are provided at predetermined intervals around the periphery of the roll body 41, extend in the vehicle width direction, and protrude in the outer diameter direction, dig into the asphalt mixture 50 that has not yet hardened immediately after it has been spread and leveled by the screed mechanism 20, forming grooves 51. This makes it possible to carry out the spreading and grooving processes for the asphalt mixture 50 for asphalt pavement roads in one go, and to form grooves 51 similar to horizontal grooving.

[0047] Furthermore, the intervals at which the groove-forming protrusions 42 are arranged in the outer circumferential direction of the roll body 41 are 1 cm or more and 15 cm or less, so that lateral grooves 51 can be formed at various intervals while maintaining the durability and anti-slip properties of the surface layer.

[0048] Furthermore, since the groove-forming protrusions 42 are detachably attached to the roll body 41, worn groove-forming protrusions 42 can be replaced without replacing the roll body 41, thereby reducing parts costs, and the paving and grooving processes can be carried out in one go, and grooves 41 similar to horizontal grooving can be formed. Furthermore, since the groove-forming protrusions 42 are rectangular, triangular, trapezoidal, or arc-shaped in cross section, horizontal grooves 51 required depending on the road surface conditions can be formed.

[0049] Furthermore, the widthwise end of the roll body 41 is provided with a support wheel 44 which is formed with a diameter smaller than that of the roll body 41 and which rolls on the support 60 during construction. Therefore, by utilizing the support 60 and the support wheel 44 which rolls on the support 60 during construction, the proper height of the main roll 41 can be maintained, and horizontal grooves 51 with good depth can be formed.

[0050] Furthermore, the arm portion 31 is swingably mounted on the screed mechanism 20, and the weight of the uneven roll for construction machinery 30 causes the groove-forming convex portions 42 to dig into the asphalt mixture 50 and form grooves 51, so grooves can be formed with a simple mechanism while the roll body 41 presses down on the road surface 52, improving the road surface condition. Furthermore, even if the road surface 52 goes from a flat area to a slope, the arm portion 31 swings automatically, making it possible to form grooves 51 of an appropriate depth.

[0051] Furthermore, the arm unit 31 is equipped with an angle adjustment mechanism 34 that changes the angle of the extension direction relative to the screed mechanism 20. By adjusting the angle of the arm unit 31, the height and pressure of the uneven roll for construction machinery 30 relative to the road surface 52 can be adjusted, making it possible to appropriately form the depth of the groove 51 and the condition of the road surface 52. Furthermore, even if the road surface 52 changes from a flat area to a slope, the angle of the arm unit 31 can be adjusted with the angle adjustment mechanism 34 to form a groove 51 of an appropriate depth.

[0052] In the embodiment, the construction machine (asphalt finisher) 10 is a wheel type having wheels 12, but is not limited to this, and the construction machine 10 may also be a crawler type having caterpillars.

[0053] In addition, in the embodiment, the main roll 41 of the uneven roll 30 for construction machinery is an integrated unit in which the central roll 41a and the side rolls 41b are arranged in a straight line, but this is not limited to this. The central roll 41a and the side rolls 41b may be arranged on the arm portion 31 with a shift in the front-to-rear direction, and the side rolls 41b may be moved in the vehicle width direction without being stored in the central roll 41a, thereby expanding or contracting the width of the entire main roll 41 in the vehicle width direction.

[0054] That is, the present invention is not limited to the examples as long as the functions and effects of the present invention are exhibited. [Industrial Applicability]

[0055] The technology of the present invention is suitable for a concave-convex roll for construction machinery that is installed on a construction machine that spreads and levels an asphalt mixture. [Explanation of symbols]

[0056] 10... Construction machinery (asphalt finisher) 20...Screed mechanism 22...Screed 30... Concave and convex roll for construction machinery 31... Arm section 32... Rotation axis 33... Oscillating shaft 34… Angle adjustment mechanism 41... Roll body 41a...Central roll 41b...Side roll 42... Groove forming convex portion 44… Support wheel 50... Asphalt mixture 51... Groove (horizontal groove) 52… Road surface (surface layer) 60, 60a... Support 61...Roadbed

Claims

1. A construction machine uneven roll provided on a construction machine that spreads and levels an asphalt mixture, The construction machine is equipped with a screed mechanism that spreads and levels the asphalt mixture and can expand and contract in the vehicle width direction to change the leveling width, The uneven roll for construction machinery is characterized in that it comprises arm portions that are provided at both ends of the screed mechanism in the vehicle width direction and extend toward the rear of the vehicle, a roll body with a telescopic structure that is rotatably provided between the arm portions and can expand and contract in the vehicle width direction, and groove forming convex portions that are provided at a predetermined interval around the outer periphery of the roll body, extend in the vehicle width direction, and protrude in the outer diameter direction, so as to dig into the asphalt mixture spread evenly on the screed mechanism and form grooves.

2. The uneven roll for a construction machine according to claim 1, A concave-convex roll for construction machinery, characterized in that the groove-forming convex portions are arranged at intervals of 1 cm or more and 15 cm or less in the outer circumferential direction of the roll body.

3. The uneven roll for a construction machine according to claim 1 or 2, the groove-forming convex portion is detachably provided on the roll body, A concave-convex roll for construction machinery, characterized in that its cross section is rectangular, triangular, trapezoidal, or arc-shaped.

4. The uneven roll for a construction machine according to claim 1 or 2, Supports are arranged along the widthwise ends of the road to be paved with asphalt, A uneven roll for construction machinery, characterized in that the vehicle width direction end of the roll body is provided with a support wheel that is formed to have a diameter equal to or smaller than the diameter of the roll body and that rolls on the support body during construction.

5. The uneven roll for a construction machine according to claim 1 or 2, The arm portion is swingably provided on the screed mechanism, A concave-convex roll for construction machinery, characterized in that the groove-forming convex portions dig into the asphalt mixture and form grooves due to the weight of the concave-convex roll for construction machinery.

6. The uneven roll for a construction machine according to claim 1 or 2, A concave-convex roll for construction machinery, characterized in that the arm portion is equipped with an angle adjustment mechanism that changes the angle of the extension direction relative to the screed mechanism.

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