JP2006152789A - Road surface display forming method, road surface cutting drum assembly and road surface cutting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently and continuously form a road surface display in a groove formed on a road surface. <P>SOLUTION: The road surface display is formed by a process of forming a belt-like groove 71 of a predetermined width on the road surface 70, a process of filling a display material in the belt-like groove 71 until an upper surface of the display material becomes substantially flush with the road surface 70 by supplying the fluidized display material including a bond and a pigment in the belt-like groove 71, and a process of fixing the display material to a wall surface of the belt-like groove 71 by hardening the fluidized display material. The display material supplied in the groove of the predetermined width is formed in a predetermined width without flowing out to an external part of the groove. The display material engages with a recess-projection of a bottom surface of the formed groove and a recess-projection part of a pair of side surfaces, and is firmly fixed in the groove. Since an upper surface of the display material is formed so as to be substantially flush with the road surface, the display material remains in the groove without being cut when removing snow, and there is no need to form the road surface display again after removing the snow. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road surface display forming method for forming a belt-like groove on a road surface in which a display structure such as a white line is embedded in the road surface, a drum assembly for road surface cutting, and a road surface cutting apparatus for mounting the drum assembly for road surface cutting. It is.

  In order to prevent traffic accidents, various road markings such as median strips, traffic division zones, crossing zones, diversion zones, etc. are provided on the road surface, but these road markings are displayed on the road surface by paint, road fences, etc. The When removing snow on a road surface with a bulldozer, the road surface is shaved with a bulldozer excavator and the road marking is also removed at the same time as the snow removal. And need. Therefore, Patent Document 1 below discloses a method of constructing a road surface dividing line in which a thick belt-shaped white line or yellow display member is fitted in a groove formed on the road surface, and the display member is pressure-bonded by a roller. . Since the road surface lane marking shown in Patent Document 1 is constructed by embedding a display member in a groove formed on the road surface, the amount of polishing by a bulldozer and the amount of abrasion by a vehicle tire are small, and the durability of the display member is increased. There is. However, Patent Document 1 does not disclose a method or apparatus for forming a belt-like groove on a road surface. Patent Documents 2 and 3 below show apparatuses for forming a belt-like groove on a road surface by pressing a blade assembly in which a plurality of thin cutting blades or blade bodies are stacked against each other while rotating.

Japanese Utility Model Publication No. 63-136006 (Fig. 2) Japanese Patent No. 3,579,401 (FIG. 1) JP 51-1224025 (Fig. 5)

  When a road surface is cut by a blade assembly formed by combining a plurality of cutting blades or blade bodies shown in Patent Documents 2 and 3, the road surface to be cut by the cutting blade or blade body is cut into a valley shape, and adjacent cutting blades or Since the space between the blades is cut in a mountain shape, the cut surface becomes an uneven surface in which a valley shape and a mountain shape continue alternately. Therefore, for example, when the conventional blade assembly is used when forming a belt-like groove having a uniform width with a uniform depth of 2 to 3 mm, an unevenness is formed on the bottom surface of the belt-like groove. When the road surface display body is formed in the belt-shaped groove, the road surface display body is partially different in thickness, and there is a drawback that the road surface display body does not adhere to the road surface with sufficient adhesive strength.

  Also, in the conventional blade assembly, after mounting a large number of blades on a single shaft provided with a key with or without a spacer, an elongated shaft is inserted into the through hole of each blade, and a nut is used. In order to fix, there exists a fault which requires a long time for attachment or detachment.

  Then, an object of this invention is to provide the road surface display formation method which forms a road surface display efficiently and continuously in the groove | channel formed on the road surface. It is another object of the present invention to provide a road surface cutting drum assembly and a road surface cutting device that efficiently and continuously form a belt-like groove having a certain depth on a road surface. Furthermore, an object of the present invention is to provide a road surface cutting drum assembly and a road surface cutting device that can be easily stored, transported, and attached.

  The road surface display forming method according to the present invention includes a process of forming a belt-like groove (71) having a predetermined width on the road surface (70) and supplying a fluidized display material containing a binder and a pigment into the belt-like groove (71). The process of filling the display material into the belt-like groove (71) until the upper surface of the display material is substantially flush with the road surface (70), and by hardening the fluidized display material, And fixing the display material to the wall surface. The display material supplied into the belt-like groove (71) having a predetermined width is formed to have a predetermined width without flowing out of the belt-like groove (71). Further, the display material is firmly fixed in the belt-like groove (71) by engaging the unevenness on the bottom surface of the formed belt-like groove (71) and the uneven portion on the pair of side surfaces. Furthermore, since the upper surface of the display material is formed substantially flush with the road surface (70), it remains in the strip groove (71) without being cut during snow removal, so it is necessary to form the road surface display again after snow removal. Absent.

  The drum assembly (1) for road surface cutting according to the present invention includes a drum (2) formed of a metal in a cylindrical shape, and a linear tip ridge (parallel to the central axis (L) of the drum (2) ( 11) and a plurality of blades (3) fixed to the outer peripheral surface (12) of the drum (2) .The drum assembly (1 ) Can be stored in an assembled state, transported and attached to a road surface cutting device. The blades (3) adjacent to each other in the width direction of the drum (2) are separated from each other in the circumferential direction, so that each blade (3) is fixed to the outer peripheral surface (12) of the drum (2) by giving a sufficient fixing area. can do. Since the end portions in the width direction of the tips (6) provided on the adjacent blade bodies (3) overlap each other and the tip ridges (11) of the tips (6) are arranged on the same radius, the belt-like groove (71 ) No strips or uneven parts are formed on the bottom surface of), and a belt-like groove (71) having a uniform depth over the entire width of the blade (3) fixed to the drum (2) is formed on the road surface (70). Can do.

  In another embodiment of the present invention, a road surface cutting drum assembly includes a metal disk (31), and a plurality of chips (6) fixed to the outer periphery of the disk (31), and A plurality of cutting blades (30) arranged on the rotating shaft (50) in a state where the side surfaces (33) of adjacent chips (6) are in direct contact with each other are provided. The plurality of cutting blades (30) have the same outer diameter formed by the tip (6), and the connecting rod (35) is inserted into the through hole (34) formed coaxially with each cutting blade (30). Insert the drum assembly (1) for cutting the road surface. By applying a clamping force to the drum assembly (1) from both ends of the connecting rod (35), separation between the chips (6) in direct contact with each other is prevented.

  The road surface cutting device (60) of the present invention includes a chassis (61), a power device (64) fixed to the chassis (61), a rotatably attached to the chassis (61) and driven to the power device (64). Fixed to the drive flange (55) of the drive shaft (50) having a connected wheel (63), a drive flange (55) and drivingly connected to the power unit (64) The drum assembly (1) provided with the drum assembly (1) and fixed to the drive flange (55) of the drive shaft (50) can be easily attached to the road surface cutting device (60). The tip ridge (11) of the tip (6) provided on the drum assembly (1) is arranged at a position lower than the wheel (63) of the road surface cutting device (60), and while rotating the drum assembly (1), the road surface When the cutting device (60) is run, the road surface (70) can be continuously cut with a constant width and a constant depth.

  By using the road surface display forming method, the road surface cutting drum assembly, and the road surface cutting device of the present invention, it is possible to efficiently and continuously form a belt-like groove having a certain depth on the road surface. The road surface cutting drum assembly of the present invention can be easily stored, transported, or easily attached to and detached from the road surface cutting device.

  1 to 11 show an embodiment of a road surface cutting drum assembly and a road surface cutting device according to the present invention.

  A drum assembly (1) for road surface cutting according to the present invention includes a drum (2) and a plurality of blade bodies (3) fixed to an outer peripheral surface (12) of the drum (2). The drum (2) is formed in a cylindrical shape having an internal cavity (7) from iron such as stainless steel or mild steel, or an iron-based alloy, and the internal cavity (7) is provided with an inner flange (8). The outer peripheral portion of the inner flange (8) is fixed to the inner peripheral surface of the cylindrical drum (2), and a through hole (9) is formed in the central portion. A plurality of openings (10) having a center on a concentric circle are formed around the through hole (9). The drum (2) has a diameter of 200 to 600 mm and a width of 150 to 1000 mm. If the diameter of the drum (2) is small, a large cutting torque is generated and a deep strip groove (71) can be formed, but a long construction time is required for cutting the entire region. If the diameter of the drum (2) is large, the cutting speed can be increased, but there is a drawback that the cutting torque is lowered. Therefore, the shape of the drum (2) may be determined according to the situation of the construction site.

  Each blade (3) includes a holder (4) fixed to the outer peripheral surface (12) of the drum (2), and a shank (5) attached to the holder (4) and having the tip (6) fixed thereto. I have. The holder (4) includes a connecting member (13) formed with a curved bottom surface (20) that matches the curved outer peripheral surface (12) of the cylindrical drum (2), and the connecting member (13) is a drum It is fixed to the outer peripheral surface (12) of (2) by welding. Alternatively, a through hole is formed in the drum (2), a stud bolt fixed to the holder (4) is inserted into the through hole of the drum (2), and the holder (4) is fixed to the drum (2) with a nut. You can also The connecting member (13) may be formed integrally with the holder (4), or may be formed separately and then fixed to the holder (4).

  As shown in FIG. 2, the shank (5) has a head (15) and a shaft having a smaller cross section than the head (15) and fitted in a support hole (14) formed in the holder (4). Part (16). A tip (6) made of hard metal such as high-speed steel or sintered metal is fixed to the head (15) by welding, and from the head (15) to the shaft (16 ) Is stretched. A side hole (17) is formed in the holder (4), and a spring pin (18) that is detachably fitted to the side hole (17) engages with a notch (not shown) of the shaft portion (16), Prevents the shaft (16) from falling off the side hole (17). The spring pin (18) rolls an elastic plate into a cylindrical shape and uses the radial spring action to drive it into the side hole (17) to place the notch in the shank (5) shaft (16) in the holder. This pin is fixed to (4) (JISB2808). Since the spring pin (18) is held in the side hole (17) by the frictional force due to its own elasticity to expand, when the spring pin (18) attached in the side hole (17) is pressed from one end, the side The other end protrudes from the hole (17), and the spring pin (18) can be taken out from the side hole (17). Therefore, the shank (5) can be attached to and removed from the holder (4) very easily, and each shank (5) is attached to the holder (4) by the spring pin (18) so that it cannot rotate and is detachable. Can do.

  The tip (6) fixed to the tip of the shank (5) has a straight tip ridge (11) parallel to the central axis (L) of the drum (2). As shown in FIG. 3, the tip (6) is formed in a rectangular shape when viewed from the front, and the front surface (21) of the tip (6) is aligned with the tip edge (11) and the central axis (L) of the drum (2). A rake face having a rake angle θ of 0 to 15 degrees is formed. The back surface (23) and the inner side surface (25) of the tip (6) are firmly welded to the contact surface (26) at a substantially right angle of the shank (5) with a metal brazing material such as copper. For example, the width (W) of the chip (6) is in the range of 10 to 100 mm, the vertical width (H) is in the range of 7 to 80 mm, and the thickness (t) is in the range of 1 to 10 mm. The outer surface (24) of the tip (6) is formed almost flush with the upper surface (22) of the shank (5), but the outer surface including the tip ridge (11) of the tip (6) has a tip ridge ( 11) A clearance angle (φ) of 0 to 15 degrees is formed with respect to the tangent to the rotation direction. Thus, once the drum assembly (1) including the drum (2) and the plurality of blade bodies (3) fixed to the outer peripheral surface (12) of the drum (2) is assembled, the drum assembly (1 ) Can be stored in an assembled state, transported and attached to a road surface cutting device.

  As shown in FIG. 6, the end portions in the width direction of the tips (6) that are spaced apart from each other in the circumferential direction and provided on the blade body (3) are overlapped with each other by an overlapping region (D) to be widened on the drum (2). The blades (3) adjacent in the direction are fixed, and the tip ridges (11) of the tips (6) are arranged on the same radius. The blades (3) adjacent to each other in the width direction of the drum (2) are separated from each other in the circumferential direction, so that each blade (3) is fixed to the outer peripheral surface (12) of the drum (2) by giving a sufficient fixing area. can do. The ends in the width direction of the tips (6) provided on the adjacent blade bodies (3) are overlapped with each other by a fixed overlap width (D), and the tip ridge (11) of each tip (6) is on the same radius. Thus, the strip-shaped groove (71) having a uniform depth can be formed on the road surface (70) without leaving uncut portions or uneven portions on the bottom surface of the strip-shaped groove (71). Although it is possible to give a constant overlap width (D) for the tips (6) of all blades (3) adjacent in the width direction, it is not necessary to have exactly the same overlap width (D), The overlapping width (D) may be non-uniform, but the amount of protrusion in the radial direction of the tip (6) in which the tip edge (11) is arranged on the same radius must be strictly controlled. In the present embodiment, at least the tips (6) of the blade bodies (3) adjacent in the width direction are displaced in the circumferential direction, that is, spaced apart from each other in angle, and fixed on the outer peripheral surface (12) of the drum (2). However, the tips (6) of all the blades (3) may be displaced in the circumferential direction and fixed on the outer peripheral surface (12) of the drum (2).

  When assembling the drum assembly (1), the shaft (16) of the shank (5) welded with the tip (6) is fitted into the support hole (14) of the holder (4), and the spring pin (18) Is mounted in the side hole (17) to fix the shank (5) to the holder. After that, the tip edge (11) of each tip (6) is placed on the same radius from the central axis (L) of the drum (2), and the holder (4) of the blade body (3) is placed on the outer periphery of the drum (2). Fixing on the surface (12), the assembly of the drum assembly (1) is completed. When fixing the holder (4) on the drum (2), the end portions in the width direction of the tips (6) are overlapped with each other by a certain overlap width (D), and the tip edge (11) of each tip (6) is It is necessary to arrange them on the same radius.

  9 to 11 show another embodiment of a drum assembly (1) for road surface cutting according to the present invention. The drum assembly (1) shown in FIGS. 9 to 11 includes a plurality of cutting blades (30) each having a metal disk (31) and a chip (6) fixed to the outer periphery of the disk (31). I have. Each of the plurality of cutting blades (30) has the same outer diameter formed by the tip (6), and the through hole (34) is formed coaxially. A plurality of slits (36) extending radially inward from the outer peripheral surface of the tip (6) are formed in each cutting blade (30) .In the same cutting blade (30), each slit (36) has a predetermined angle. They are spaced apart. The cutting blade (30) has a center hole (32) and a notch (29) formed together with the center hole (32), and a rotation shaft (50) is provided in the center hole (32) of the cutting blade (30). Is inserted, the key (25) fixed to the rotating shaft (50) is fitted into the notch (29) of the cutting blade (30), and the cutting blade (30) is integrated with the rotating shaft (50). Rotate.

  Thereafter, the drum assembly (1) is detachably fixed to the drive flange (55) of the drive shaft (50) shown in FIG. 7, but FIG. 7 shows a road surface cutting device (60) for the self-propelled vehicle shown in FIG. The perspective view of the drive shaft (50) removed from) is shown. A pulley (53) for power transmission is fixed to the drive shaft (50), a belt (54) is wound around the pulley (53), and the belt (54) is a power device of the road surface cutting device (60) ( 64) or connected to an additional power unit. The drive shaft (50) can be detachably attached to the road surface cutting device (60) of FIG. In the embodiment shown in FIG. 1, after the through hole (9) of the inner flange (8) fixed to the drum (2) is fitted to the drive shaft (50), the opening (10) of the inner flange (8). And the opening (56) formed in the drive flange (55) of the drive shaft (50) are aligned coaxially, and the inner flange (8) and the drive flange (55) are fixed by known fixing means such as bolts and nuts. The drum assembly (1) can be attached to the road surface cutting device (60).

  In the embodiment shown in FIG. 11, a spacer (36) is disposed between the disks (31) of adjacent cutting blades (30), and a through hole (37) is also formed in the spacer (36). Insert a bolt-shaped connecting rod (35) into the through hole (34) of each cutting blade (30), the through hole (37) of the spacer (36) and the opening (56) of the drive flange (55), and connect them. The drum assembly (1) is attached to the drive flange (55) by tightening the head (38) and the nut (39) of the rod (35). Since the thickness of the spacer (36) is slightly smaller than the distance between the adjacent disks (31), by applying a clamping force to the drum assembly (1) from both ends of the connecting rod (35), the adjacent chip ( Applying sufficient axial pressing force to the cutting blades (30) arranged on the rotating shaft (50) with the side surfaces (33) of 6) in direct contact with each other, between the tips (6) directly contacting each other The connecting rod (35) can be fixed to the flange (55) fixed to the rotating shaft (50).

  As shown in FIG. 8, the road surface cutting device (60) includes a chassis (61), a power device (64) fixed to the chassis (61), a rotatably attached to the chassis (61), and a power device ( 64) driving wheel (63) drivingly connected to the power transmission device (66), a driving shaft (50) having a driving flange (55) and drivingly connected to the power device (64), and a driving shaft (50 And a drum assembly (1) fixed to a drive flange (55). The tip edge (11) of the tip (6) provided on the drum assembly (1) is placed at a position lower than the wheel (63), and the drum assembly (1) is rotated so that the road surface (70) has a certain width. And cutting at a certain depth. Since the drum assembly (1) is fixed to the drive flange (55) of the drive shaft (50), the drum assembly (1) can be easily attached to the road surface cutting device (60) to constitute the road surface cutting device. . The tip edge (11) of the tip (6) provided on the drum assembly (1) is placed at a position lower than the wheel of the road surface cutting device, and the tip (6) of the drum assembly (1) contacts the road surface (70). Thus, when the road surface cutting device is run while rotating the drum assembly (1), the road surface (70) can be continuously cut with a constant width and a constant depth.

  Both ends of the drive shaft (50) are rotatably supported by bearings (not shown) fixed to the road surface cutting device (60), and are supported to be movable in the vertical direction with respect to the road surface cutting device (60). By operating the single power unit (64), the wheel (63) is rotated and the road surface cutting device (60) is self-propelled, and at the same time, the drive shaft (50) is rotated and the wheel (63) is rotated. The road surface (70) can be cut by rotating the drum assembly (1) in the direction opposite to the rotation direction.

  When the road surface cutting device (60) is moved on the road surface (70) while rotating the drum assembly (1) with the tip (6) shown in FIG. 1 or FIG. 9 biting into the road surface (70), the drum assembly is moved. A belt-like groove (71) having a predetermined width equal to the width of (1) is formed on the road surface (70). For example, the road surface (70) is formed of asphalt or concrete and can form a belt-like groove (71) having a depth of 1 to 5 mm, preferably 2 to 3 mm and a width of 100 to 1000 mm. The depth is determined by setting the vertical position with respect to the road surface cutting device (60), and the width of the belt-like groove (71) is determined by the total width of the plurality of blade bodies (3) attached to the drum (2). It can be determined appropriately. Thus, in the present embodiment, the drum assembly (1) can be easily stored, transported, or easily attached to and detached from the road surface cutting device (60). Further, by using the road surface cutting device (60), it is possible to efficiently and continuously form a belt-like groove (71) having a predetermined width and a constant depth on the road surface (70). Since the strip surface groove (71) having a constant depth and a constant width is continuously formed on the road surface (70) using the road surface cutting device (60), good workability can be obtained.

  After the belt-like groove (71) having a predetermined width is formed on the road surface (70), the display material is supplied into the belt-like groove (71). The display paint includes a binder, a pigment, a fluidizing agent, glass beads, and a hard aggregate, and the depth of the strip groove (71) is larger than the diameter of the glass beads or the hard aggregate. The pigment of the display paint is not limited to white, and pigments of various colors such as green, blue, and red can be used as necessary. When supplying the display material into the belt-like groove (71), the fluidized display paint is poured into the belt-like groove (71) and uniformly filled into the belt-like groove (71) by its fluidity. If the supply rate of the display paint having fluidity is appropriately selected, the display paint forms a uniform surface in the belt-like groove (71) and almost flush with the road surface (70) by its own weight. Is easy to install. By curing the fluidized display material containing the binder and the pigment, the display material can be fixed to the wall surface including the bottom surface and both side surfaces of the belt-like groove (71). In this case, while the road surface cutting device is moved, the road surface (70) is continuously cut to a certain depth, and at the same time, the paint supply device is moved subsequent to the road surface cutting device to remove the belt-like groove from the paint supply device. Display paint may be injected into (71).

  By following the road surface cutting device (60) to be moved first and moving the paint supply device, it is possible to continuously and simultaneously form the strip groove (71) of the road surface (70) and the road surface display, Construction time can be shortened. By changing the vertical position of the drive shaft (50) provided at the lower part of the road surface cutting device (60), the depth of the belt-like groove (71) by the blade body (3) or the rotating blade (30) can be adjusted. . Depending on the location of the road surface (70) or construction conditions, the depth of the strip groove (71) may be changed, but the depth of the strip groove (71) can be easily adjusted by adjusting the amount of protrusion of the blade (3). can do. The display device paint may be continuously heated and cured by moving the heating device subsequent to the paint supply device. By following the heating device and moving, the formation of the strip groove (71), the supply of the display paint, and the curing can be performed continuously and rapidly through a series of processes. The upper surface of the display material in the belt-like groove (71) is formed substantially flush with the road surface (70), and the display material is cured. The display material may be cured by slightly projecting the upper surface of the display material in the belt-like groove (71) from the road surface (70). By slightly projecting the upper surface of the display material in the strip groove (71) from the road surface (70), the display material becomes higher than the road surface (70), and rainwater adhering to the display material flows out of the display material. The visibility of the display material by a person or a pedestrian can be improved. The display material supplied into the belt-like groove (71) having a predetermined width is formed to have a predetermined width without flowing out of the belt-like groove (71).

  Further, the display material penetrates and engages the inside of the surface of the bottom surface and the pair of side surfaces forming the belt-like groove (71), and is firmly fixed in the belt-like groove (71). In particular, the display material is firmly fixed in the belt-like groove (71) by engaging with the concave and convex portions on the bottom surface of the formed belt-like groove (71) and the concave and convex portions on the pair of side surfaces. Furthermore, since the upper surface of the display material is formed substantially flush with the road surface (70), it remains in the strip groove (71) without being cut during snow removal. In addition, glass beads and hard aggregates blended in the display paint are also arranged in the belt-like groove (71), so that they are hardly destroyed during snow removal, and there is no need to reconstruct the road surface display after snow removal. .

  The road surface display forming method, the road surface cutting drum assembly, and the road surface cutting device of the present invention can be used for various road surfaces such as roadways, airports, trucks, wharfs, and the like.

Side view of a road surface cutting drum assembly according to the present invention. Side view of blade fixed to drum Front view of blade fixed to drum Top view of the blade Rear view of blade The partial front view of the drum assembly for road surface cutting by this invention The perspective view which shows the drive shaft of the road surface cutting apparatus which mounts the drum assembly for road surface cutting Side view of road cutting device The perspective view of the drum assembly for road surface cutting by other embodiment of this invention Side view of cutting blade used in drum assembly for road surface cutting shown in FIG. Sectional drawing of the drum assembly for road surface cutting by other embodiment of this invention

Explanation of symbols

  (1) ... Drum assembly for road surface cutting, (2) ... Drum, (3) ... Blade, (4) ... Holder, (5) ... Shank, (6) ... Tip, ( 8) ・ ・ Inner flange, (11) ・ ・ Tip edge, (12) ・ Outer peripheral surface, (14) ・ ・ Support hole, (15) ・ ・ Head, (16) ・ ・ Shaft, (18)・ ・ Spring pin, (L) ・ ・ Center shaft, (22) ・ ・ Front, (23) ・ ・ Back, (25) ・ ・ Inside, (30) ・ ・ Cutting blade, (31) ・ Disk, (33) ・ ・ Side, (35) ・ ・ Connecting rod, (36) ・ ・ Slit, (50) ・ ・ Drive shaft, (54) ・ ・ Drive device, (55) ・ ・ Drive flange, (60) ・・ Road surface cutting devices, (63) ・ ・ Wheels, (70) ・ ・ Road surfaces, (71) ・ ・ Strip grooves,

Claims (23)

Forming a belt-like groove of a predetermined width on the road surface;
Supplying a fluidized display material containing a binder and a pigment into the strip groove, and filling the strip material with the display material until the upper surface of the display material is substantially flush with the road surface;
A method of forming a road surface display, comprising: fixing a display material to a wall surface of a belt-like groove by curing a fluidized display material.   The process of forming the belt-shaped groove is performed by rotating the drum assembly for road surface cutting provided on the road surface cutting device, pressing the drum assembly against the road surface and moving the road surface cutting device, and moving the road surface cutting device at a certain depth and width. The road surface display forming method according to claim 1, comprising a step of continuously forming a belt-like groove having   In the process of forming the belt-like groove, the wheel of the road surface cutting device is driven in the forward direction by a single power unit provided in the road surface cutting device, and at the same time, the drum assembly is rotated in the opposite direction to the wheel to continue the belt-like groove. The road surface display forming method according to claim 2, further comprising a process of cutting the road surface. The process of supplying the display material into the strip groove includes a process of uniformly filling the strip groove by the fluidity of the fluidized display material itself,
The road surface display forming method according to any one of claims 1 to 3, wherein the depth of the belt-like groove is larger than the diameter of the glass beads or hard aggregate blended in the display material.   2. A process of moving a paint supply device for injecting display paint into a belt-like groove following a road cutting device while moving the road surface cutting device to continuously cut the road surface to a certain depth. The road surface display forming method according to any one of?   The road surface display forming method according to claim 5, wherein the display paint is continuously heated and cured by moving the heating device subsequent to the paint supply device.   2. The road surface display forming method according to claim 1, further comprising a step of curing the display material by slightly projecting an upper surface of the display material in the belt-like groove from the road surface. A drum formed in a cylindrical shape with metal, and a plurality of blades having a tip that forms a linear tip ridge parallel to the central axis of the drum and fixed to the outer peripheral surface of the drum,
The blades adjacent to each other in the width direction of the drum are separated from each other in the circumferential direction, the ends in the width direction of the chips provided on the adjacent blades are overlapped with each other, and the tip ridges of the chips are arranged on the same radius. The drum assembly for road surface cutting characterized by this.   The drum assembly according to claim 8, wherein each blade includes a holder fixed to the outer peripheral surface of the drum, and a shank attached to the holder and having a chip fixed thereto.   The drum assembly according to claim 9, wherein each shank is non-rotatably and detachably attached to the holder.   The chip is formed in a rectangular shape when viewed from the front, and the front surface forms a rake face having a rake angle of 0 to 15 degrees with respect to the tip edge and the central axis of the drum, and the back surface and the inner surface are fixed to the shank. The drum assembly according to claim 9 or 10. The shank has a head for fixing the tip, and a shaft portion extending from the head on the opposite side of the tip,
The drum assembly according to claim 10 or 11, wherein the shaft portion is smaller in cross section than the head portion and fitted in a support hole formed in the holder, and is detachably fixed to the holder by a spring pin.   The drum assembly according to any one of claims 8 to 12, wherein the horizontal width of the chip is in the range of 10 to 100 mm, the vertical width is in the range of 7 to 80 mm, and the thickness is in the range of 1 to 10 mm. Solid.   The drum assembly according to any one of claims 8 to 13, wherein an outer side surface including a tip ridge of the chip forms a clearance angle of 0 to 15 degrees with respect to a rotation tangent of the tip ridge.   The drum assembly according to any one of claims 9 to 14, wherein the holder includes a connecting member having a curved bottom surface that fits the curved outer peripheral surface of the cylindrical drum.   The drum assembly according to any one of claims 8 to 15, wherein an inner flange that transmits a rotational force to the drum is fixed to an inner peripheral surface of the drum.   The drum assembly according to any one of claims 8 to 16, wherein at least the tips of the blade bodies adjacent in the width direction are fixed on the outer peripheral surface of the drum while being shifted in the circumferential direction.   The drum assembly according to any one of claims 8 to 16, wherein the tip of the blade body is fixed on the outer peripheral surface of the drum while being displaced in the circumferential direction. A plurality of cutting blades having a metal disk and a plurality of chips fixed to the outer periphery of the disk and arranged on a rotating shaft in a state where the side surfaces of adjacent chips are in direct contact with each other;
The plurality of cutting blades have the same outer diameter formed by the chip,
Inserting a connecting rod into a through-hole formed coaxially in each cutting blade to constitute a drum assembly for road surface cutting,
A drum assembly for road surface cutting, which prevents separation between chips that are in direct contact with each other by applying a tightening force to the drum assembly from both ends of a connecting rod.   The drum assembly according to claim 19, wherein a connecting rod is fixed to a flange fixed to the rotating shaft.   The drum assembly according to claim 19 or 20, wherein a plurality of slits are formed in each cutting blade so as to extend radially inward from the outer peripheral surface of the chip and be separated from each other by a predetermined angular interval. A chassis, a power unit fixed to the chassis, a wheel rotatably attached to the chassis and drivingly connected to the power unit, a driving shaft having a driving flange and drivingly connected to the power unit, and a drive shaft A drum assembly according to any one of claims 8 to 21 fixed to a drive flange,
Place the tip edge of the tip provided in the drum assembly at a position lower than the wheel,
A road surface cutting device characterized by rotating a drum assembly to cut a road surface with a constant width and a constant depth.   By operating a single power unit, the wheel is rotated and the road surface cutting device is self-propelled, and at the same time, the drive shaft is rotated to rotate the drum assembly in the direction opposite to the rotation direction of the wheel, The road surface cutting device according to claim 22, wherein the road surface cutting device performs cutting of the road surface.

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