JPH0336569Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a road surface regeneration machine such as a repaver used in maintenance and repair methods of asphalt-paved roads.

[Conventional technology]

The surface of asphalt paved roads undergoes undulations and thinning due to use, so the road surface is regenerated using a road surface regeneration machine (repaver) equipped with a raking device and a leveling device. That is, the paved road surface G is heated with a heater, the asphalt layer softened thereby is scraped up with a scraping device (see Figure 10 A), and the scraped paving material M is placed in the form of a flat plate with the lower end set horizontally. After leveling with the blade (No. 10)
On top of that, asphalt mixture A is discharged from the hopper via a bar feeder, and is spread evenly by a leveling device (see Figure 10, c).

[Problem that the invention attempts to solve]

However, in the conventional road surface regeneration method as described above, cracks tend to occur at the boundary B between the scraped-up area and the as-paved area. This is thought to be because the scraped paving material M is lower in temperature and has deteriorated quality compared to the new composite material A, so it is difficult to adhere sufficiently to the as-paved portion.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention includes a raking device that scrapes the pavement on the road, a scarf ear blade that smooths out the scraped paving material, and a raking device that scrapes the pavement on the road. In a road surface regeneration machine equipped with a leveling device that supplies and spreads new paving material on top of the old paving material, the above-mentioned scarf ear blade is formed so as to protrude downward at the end. .

[Effect]

In the above-mentioned road surface regeneration machine, the edge of the blade protrudes downward, so the edge of the raked pavement section is dug up to form a groove, and the road surface regeneration machine is disposed of in that area from the hopper. It is filled with a new composite material with high adhesion, which improves the strength of the boundary between the unpaved area and the raked area.

〔Example〕

Fig. 1 shows a road surface regeneration machine according to the present invention, in which a crawler-type traveling vehicle 1 is equipped with a hopper 2 for asphalt mixture, and a spretting screen at the rear of which the asphalt mixture is taken out from the hopper 2. It is equipped with a bar feeder 4 for discharging into the tray 3, a leveling device 5, and a scraping device 6.

The scraping device 6 has a mounting member fixed to the main frame 9, 9a, 9b at the tip (right end in FIG. 1) of a support arm 8 provided on the vehicle 1 so as to be able to rotate up and down about a pivot 7. 10 is mounted on a mounting shaft 11 so as to be freely rotatable up and down and tiltable (swingable) left and right. The inclination angle of the main frames 9a, 9b is adjusted, and the vertical position is adjusted by a hydraulic cylinder 13 provided between the traveling vehicle 1 and the mounting member 10.

2 to 6 show details of the scraping device 6, and 14a and 14b are guide rods.
These guide rods 14a, 14b are connected to main frames 9a, 9b and center frames 15a, 15b.
The outer plates 18a, 18b are inserted into the bushes 16a, 16b provided at the outer ends thereof.
In addition, an inner plate (not shown) is fixed to the inner end. The main frame 9a,
9b and the center frames 15a, 15b are integrally connected by a connecting member 19 having a channel structure.

The outer plates 18a, 18b and the inner plates are integrally connected by a rotor cover 19a to constitute movable frames 17a, 17b, and a bearing (not shown) at the lower end allows the rotors 20a, 20b to freely rotate in the circumferential direction. The outer plate 1 is pivotally supported.
It is configured to be rotated in the circumferential direction via a drive sprocket 21, a chain 22, and a passive sprocket 23 by a rotary drive device (not shown) such as a hydraulic motor attached to the shafts 8a and 18b.

Further, at the rear end portions of the outer plates 18a and 18b (the right end portion in FIG. 2), scarf ear blades 24a and 24b as shown in FIGS. 7 and 8 are provided.
However, the nut bodies 25a, 25 provided at one end thereof
b is screwed onto a screw shaft 26 attached to the outer plates 18a, 18b so as to be vertically adjustable. These scarf ear blades 24a, 24b have a pair of front and rear guides 27a whose inner ends are fixed to the main frames 9a, 9b.
28a, 27b, 28b and center frame 15
Slide grooves 29a, 29b, 29 formed in b
The outer plate 18 is inserted into the screw shaft 26 by the screw shaft 26 so that the vehicle 1 is prevented from moving in the front-rear direction, but is allowed to move up, down, left and right.
It is supported in a cantilever manner with respect to a and 18b.

These scarf eye blades 24a, 24b
are flat blade bodies 30a, 30 having a width approximately corresponding to the distance between the main frames 9a, 9b.
Vertical reinforcing plates 31a, 31b and the nut bodies 25a, 25b are provided at one end of b, and the lower portions of the blade bodies 30a, 30b are bent rearward so that the lower surfaces are inclined backwards with respect to the ground. ,
Leveling portions 33a and 33b are formed along the length of the blade bodies 30a and 30b. In the left scarf ear blade 24a (located on the front side), its lower part is bent into a U-shaped cross section.
The leveling part 33a is formed to protrude to the front side of the blade main body 30a, and the lower part of the right scarf ear blade 24b (rear side) is bent into an L-shape.
b, and is formed to protrude toward the rear side of the scarf ear blades 24a, 24b to prevent interference between the leveling portions 33a, 33b when the scarifier ear blades 24a, 24b slide in the left-right direction. These leveling parts 33a, 33b
In the width direction of the traveling vehicle 1, the end thereof is located at the same position as the end of the screw (not shown) provided on the rotor 20a, 20b of the scraping device 6, and a rod-shaped or plate-shaped Reinforcement members 34a, 34
b is attached.

The blade bodies 30a, 30b are provided with projecting pieces 35a, 35b at one end thereof (an end corresponding to the end of the vehicle 1), respectively. The protruding pieces 35, 35 are approximately rectangular, and a bolt 37 is inserted into the elongated holes 36, 36 formed in the vertical direction and into the bolt holes of the blade bodies 30a, 30b, and tightened with a nut 38. It is movably attached to and its outer end coincides with the outer end of the leveling portions 33a and 33b.

The rotors 24a and 24b are each provided with a screw with a bit (both not shown) around the rotary drum, and the screws are arranged so that their width directions are substantially parallel to each other in a substantially horizontal plane.

Between the main frames 9a, 9b and the center frames 15a, 15b, there are mounting members 41a,
41b is constructed, and their mounting members 41a,
Hydraulic cylinders 42a and 42b are attached to 41b. Hydraulic cylinders 42a, 42b connect rotors 20a, 20b and scarifier ear blades 2.
4a, 24b, and the piston rods 43a, 43b are moved between the outer plates 18a, 43b.
18b.

Further, the leveling device 5 has rotors 24a and 24b.
Two screeds 50 that can be moved left and right in the same way as
a and 50b, and is attached to the vehicle 1 by an arm 51 in a well-known manner.

Next, the operation of the road surface regeneration machine according to the present invention will be explained.

First, the height position of the protruding piece 35 is adjusted using the bolt 37 and nut 38, and the leveling parts 33a, 3
3b by an appropriate length l. This length l is set slightly smaller than the depth of scraping by the scraping device 6. Note that the height of the bottom of the blade body 30 is set to a position slightly lower than the original road surface G. The hydraulic cylinder 13 is extended to lower the scraping device 6 onto the road surface G, and the rotor 20
The traveling vehicle 1 is made to travel to the left in FIG. 1 while rotating the wheels a and 20b. As a result, the paved road surface is scraped up (see FIG. 9A) and leveled by the scarf ear blades 24a and 24b. At this time,
The scraped-up paving material M is dug by the protruding pieces 35 at the ends in the width direction of the scraped-up portion, and grooves S are formed at the boundary B with the paved portion (see Fig. 9B). . After that, a new asphalt mixture A is discharged from the hopper 2 via the bar feeder 4 and is leveled by the leveling device 5.
As shown in FIG. 9C, a paved road surface is formed in which the thickness of the new composite material A is increased at the boundary B. On such a paved road surface, the new composite material A has a high temperature and does not deteriorate in quality, so it has strong adhesion at the boundary with the unpaved area and the scraped up paving material M, and is therefore less likely to cause cracks, etc. A strong boundary B that is unlikely to occur is formed.

In this example, the projecting piece 35 is formed separately from the blade bodies 30a, 30b, and is attached to the blade bodies 30a, 30b so as to be vertically adjustable. As shown by the dashed line, the lower end portions of the blade bodies 30a, 30b are extended without being bent, and the protruding pieces 35'a, 35'b are attached to the blade bodies 30a, 30b.
It may be formed integrally with 0b.

[Effect of idea]

As explained above, the road surface regeneration machine of the present invention includes a raking device for raking the pavement on the road, a scarf ear blade for leveling the raked paving material, and a raking device for raking the pavement on the road. In a road surface regeneration machine equipped with a leveling device that supplies and spreads new paving material on top of the paving material, the above-mentioned scarf ear blade is formed so as to protrude downward at the end. , Thicken the new paving material at the boundary between the as-paved part and the regenerated part, and regenerate the pavement so that it has strong adhesion with the paving material at the boundary and is less prone to cracking in this part. I can do it.

[Brief explanation of the drawing]

Fig. 1 is a side view of the road surface regeneration machine according to the present invention, Fig. 2 is a plan view of the scraping device, Fig. 2a is a perspective view of a part of Fig. 2, and Fig. 3 is a partial view of Fig. 2. 4 is the same view, 5 is the same view, 6 is the same view, and 7 and 8 are the left and right scarf eye views, respectively. The blades are shown; A is a plan view, B is a side view, and C is a front view; Fig. 9 is a sectional view showing the state of road resurfacing by the road resurfacing machine according to this invention; and Fig. 10 is a conventional one. FIG. DESCRIPTION OF SYMBOLS 1... Traveling vehicle, 5... Leveling device, 6... Scraping device, 24a, 24b... Scarifier ear blade,
35a, 35b, 35'a, 35'b...Protruding pieces.

Claims (1)

[Scope of utility model registration request] On the vehicle, there is a raking device that scrapes up the pavement on the road, a scarf ear blade that levels the scraped up paving material, and a new paving material that is supplied and laid on top of the leveled paving material. A road surface regeneration machine equipped with a leveling device, characterized in that the scarifier blade is formed to protrude downward at an end.