JPS6340497Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a repair device for repairing the repaired surface of heated and softened asphalt pavement.

In general, roads paved with asphalt mixture often undergo plastic deformation over time due to heavy traffic, resulting in unevenness. Furthermore, in cold and snowy regions, tire chains and spiked tires are used on automobiles to prevent slips, and these chains and tires wear the pavement surface and cause ruts. The occurrence of unevenness such as the ruts described above changes the pavement structure. As a result, the pavement structure loses its supporting capacity, the pavement surface is destroyed, and the smooth operation of automobiles running on the pavement surface is hindered. Further, when water puddles are formed on uneven parts such as the ruts due to rain, a hydroplaning phenomenon occurs, which greatly impairs the safety of driving a vehicle. Therefore, in today's era where transportation is highly dependent on roads,
Repair and maintenance of road pavement surfaces has become an extremely important issue.

By the way, when repairing a road pavement surface, it is necessary to minimize road regulations and perform construction work such as regeneration and finishing at the current location. Normally, when repairing such an asphalt pavement surface, there are two methods: inserting new asphalt mixture into the uneven parts and compacting it, or excavating and removing the asphalt pavement to a predetermined depth, and then inserting new asphalt mixture into the removed areas. There is a method of compaction. According to the former method, the contact surface between the old and new paving materials is weak and the durability is poor, and the latter method requires a large amount of new asphalt, which is uneconomical, and requires manpower for excavation and removal. The applicant proposed a two-layer construction method in Utility Model Application Publication No. 56-16705, in which cut asphalt mixture is evenly spread and new asphalt mixture is added to the upper layer, thereby reducing the amount of new asphalt mixture used. I'm doing it.

However, in both of these repair methods, the paved surface of the heated and softened asphalt pavement is scraped with cutters, but the length of these cutters cannot be adjusted according to the road width, so it is difficult to repair roads of different widths. The width of the road is too narrow for Katsutata, making it impossible to carry out repair work, or it is too wide, requiring multiple repairs even for the slightest extra width, resulting in inconveniences for actual use. Ta.

In view of the above circumstances, the present invention aims to loosen and level the old asphalt mixture by passing the repaired surface of heated and softened asphalt pavement once or a minimum number of times without being affected by the width of the road. The purpose is to make it possible to use the old asphalt mixture as a repair material.

The gist of this is that the cutter is used as a bit to loosen heated and softened asphalt pavement.
A spiral blade for conveying and leveling the scraped old asphalt mixture in the width direction of the device is provided on a rotating shaft extending in the width direction of the device, and a plurality of cutters are shifted back and forth. The blade is arranged such that at least one cutter is movable in the width direction of the vehicle, and the blade for leveling the old asphalt mixture loosened by the cutter is used to spread the loosened asphalt pavement from the middle part on both sides of the asphalt pavement. The loosened asphalt mixture is laid out in a shape so that it becomes deeper, and the length in the width direction of the vehicle can be adjusted so that it can be moved freely in the vehicle width direction. The screed for compacting the new asphalt mixture spread on the mixture is configured to be freely movable in the vehicle width direction so that its length in the vehicle width direction can be adjusted.

The present invention will be described in detail below with reference to the drawings.

1 and 2 show an embodiment of a repair device according to the present invention. This repair device 1
is designed to be able to run on its own using front and rear wheels 2 and 3.

The device 1 is provided with a driver's cab 4 at the top. In addition, in front of this driver's cab 4 is an engine 5.
is installed. The engine 5 drives the rear wheels 3 to cause the device to travel, and serves as a driving source for each part of the device. Further, the front wheels 2 are provided with a steering mechanism (not shown) for steering the device 1.

Furthermore, a hopper 6 is provided at the front upper part of the device 1 to receive and store new asphalt mixture from a dump truck or the like. At the bottom of this hopper 6, the asphalt mixture in the hopper 6 is placed in the device 1.
A bar conveyor 7 is provided to convey the bar to the rear of the bar.

Furthermore, a cutter 9 is disposed at the rear of the rear wheel 3 and has a spiral spring 8a provided on the outer periphery of a cylindrical rotating body extending in the width direction of the device. Applicable splash 8a
A large number of bits 8 are arranged in a row at predetermined intervals, and when the cutter 9 rotates, it has the effect of scraping the asphalt pavement which has been softened by heating. The spring 8a is formed in a reverse winding direction from the center to the left and right,
It plays the role of a so-called screw conveyor that transports and spreads the loosened asphalt mixture from the center toward opposite sides.

Two side cutters 10 are arranged at the left and right rear of the cutter 9 so as to partially overlap the left and right ends of the cutter 9 in the central part.
It has substantially the same structure as the above, and has springs 8a that rotate in opposite directions to further transport the old asphalt composite material that has been transported to both sides by the cutter 9 to both sides outward.

These side cutters 10, 10 are supported so as to be freely movable in the axial direction, and all the cutters 9, 10, 10 are rotationally driven by a drive mechanism (not shown).

The cutters 9, 10, 10 are moved up and down by hydraulic cylinders (not shown), and the side cutters 1
The length is changed by moving 0 and 10 to the left or right, respectively, so that the depth of the asphalt pavement surface to be loosened and the length of the cutter as a whole in the width direction of the device can be adjusted.

Further, a blade 11 is provided behind the cutters 9, 10, and 10 in parallel with the cutters 9. Side blades 12, 12 are provided on the left and right rear sides of this blade 11. side blade 1
As shown in FIG. 3, the lower portions of the left and right outer edges of 2 and 12 form protrusions 12a that protrude downward by a predetermined width for deep leveling. Further, the blades 11, 12, 12 are moved up and down by a hydraulic cylinder (not shown), and the side blades 12, 12 are moved horizontally and parallelly, respectively, so that the overall length in the width direction of the device changes and is evened out. Depth and width can be selected.

A screw conveyor 13 is provided behind the blade 11 and spreads the new asphalt mixture supplied by the bar conveyor 7 on the smoothed surfaces of the blades 11 and 12 in the left-right direction.

Leveling arms 14 are attached to both sides of the device 1, and at the rear end of this leveling arm,
Left and right screeds 15 and 16 are attached. These screeds 15, 16 are located behind the screw conveyor 13. These screeds 15 and 16 extend in the left-right direction and are disposed to the left and right of the center in the left-right direction of the device 1, respectively, and are shifted back and forth, and are moved left and right, respectively, by hydraulic cylinders (not shown). The total width of the screeds 15 and 16 is changed. In addition, the left and right screeds 15 and 16 have
A vibrator 18 is attached to compact the asphalt mixture that has been spread.

The cutters 9, 10, blades 11, 12, and screeds 15, 16 are equipped with an automatic control device (not shown).
This makes it possible to automatically control cutting depth, leveling thickness, etc.

Note that 19 is a spray nozzle for spraying a rejuvenating agent to rejuvenate aged asphalt mixture, and 20 is a rear step.

Next, a method of using the repair device configured as described above will be explained.

First, the cutters 9, 1 of the repair device 1 according to the present invention
0, blades 11, 12, screeds 15, 16
The width of the action is adjusted to a predetermined dimension, and the vertical position is controlled. As a result, the asphalt pavement surface to be repaired can be repaired according to the width.

Next, the device 1 is caused to run along the pavement surface which has been softened by a heat softening device (not shown).

By the way, as shown in FIG. 4, an asphalt paved road is compacted by providing a base layer 31 on the upper surface of a roadbed 30, and further providing a surface layer 32 thereon. However, the original paved surface 33 is worn out by the spiked tires of running cars, etc.
Irregularities such as ruts 34 occur. When repairing these irregularities, first, as described above, the area between E and E including the ruts 34 and the like is heated and softened by the not-shown pavement heating device. Along this softened paved surface, the device 1 with each part adjusted to predetermined dimensions is run. In this case, the cutters 9, 10, the blade 11,
12. The working width of the screeds 15 and 16 is adjusted to Roro, which is slightly narrower than Ei. Therefore, the surface layer 32 is lowered by bit 8 of cutters 9 and 10.
The width portion is loosened to a predetermined depth and leveled in the right and left direction by the springs 8a. Then,
The loosened part is leveled by the blades 11 and 12, but both sides are deeply scraped up by the protrusion 12a of the side blade 12 as shown in FIG. are collected in. Next, a new composite material 36 is supplied onto the old composite material 35 by the bar conveyor 7 and the screw conveyor 13, and is compacted by the screeds 15 and 16 as shown in FIG. In this case, the thickness 36a of the new asphalt composite material 36 is adjusted by the thickness 35a of the old composite material 35 so that the position of the repaired paved surface becomes the same as the position of the original paved surface 33. Further, after compacting with the screeds 15 and 16, it is further tightened with a road roller (not shown) or the like.

As mentioned above, since it has a two-layer structure in which the old asphalt mixture made by scraping the asphalt pavement surface is used as the lower layer and the new asphalt mixture is spread on the upper layer, it is possible to save the material of the new asphalt mixture, and also Because the material is deeply scraped up, the old and new materials come into contact with each other over a large area, and the materials that have been softened by being heated to high temperatures are consolidated, resulting in strong adhesion and a small difference in thermal shrinkage, preventing separation of the boundary layer. It has a strong finish.

Furthermore, it is well known that rejuvenating agents are effective in repairing cracks caused by aging in asphalt composite materials. Therefore, when the rejuvenating agent is sprayed from the spraying nozzle 19 as needed and loosened by the cutters 9 and 10, it can be uniformly mixed into the composite material.

As explained above, in the present invention, the lengths of the cutters, blades, and screeds in the vehicle width direction can be adjusted, so that the vehicle widths of the cutters, blades, and screeds can be adjusted according to the repair width of asphalt pavement. Since the length in the direction can be adjusted arbitrarily, asphalt pavement can be repaired with just one run, thereby improving work efficiency.

In addition, because it has a two-layer structure, with the old asphalt mixture made by scraping the asphalt pavement surface with a cutter as the lower layer, and the new asphalt mixture being spread on the upper layer, it is possible to save on the materials used for the new asphalt mixture. Since both sides are deeply scraped up, the new and old composite materials come into contact with each other over a large area on both sides, and the composite materials that have been heated to high temperatures and softened are consolidated, resulting in strong adhesion and little difference in thermal shrinkage. Prevents separation of the boundary layer and provides a strong finish.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the device according to the present invention, with Figure 1 being a side view, Figure 2 being a plan view taken in the direction of the - arrow in Figure 1, and Figure 3 being a side blade. 4 to 6 are cross-sectional views of the road showing the progress of repair of an asphalt-paved road using this device. Figure 5 shows the softened pavement surface loosened and leveled, and Figure 6 shows the new asphalt mixture spread and compacted on the leveled surface in Figure 5. 1...Repair device, 8...Bit, 8a...Splash, 9...Cut, 10...Side cutter, 11
...Blade, 12...Side blade, 15...
...Left screed, 16...Right screed, 17...
... Hydraulic cylinder, 33 ... Initially paved surface, 34 ...
Rut, 35...Old asphalt mixture, 36...New asphalt mixture, Rollo...Width to loosen.

Claims (1)

[Scope of utility model registration request] A cutter loosens the heat-softened asphalt pavement surface to a specified depth, a blade spreads the loosened asphalt mixture, and tightens the new asphalt mixture spread over the old asphalt mixture. A repair device comprising a screed for hardening the cutter, a bit for scraping the heated and softened asphalt pavement, and a spiral sputter for conveying and leveling the scraped old asphalt mixture in the width direction of the device. are provided on a rotating shaft extending in the width direction of the device, and a plurality of the cutters are arranged to be shifted back and forth, and at least one cutter is configured to be freely movable in the width direction of the vehicle, and the blade is The loosened asphalt mixture is laid out so that both sides of the loosened asphalt pavement are deeper than the middle part, and the length in the vehicle width direction is adjustable. 1. A repair device for a paved road, etc., characterized in that the screed is configured to be freely movable in the vehicle width direction, and the screed is configured to be freely movable in the vehicle width direction so that the length in the vehicle width direction is adjustable.