JPH0913314A - Cutting device for asphalt road face - Google Patents

Abstract

PURPOSE: To increase the workability, by providing a blade cutting asphalt heated and softened by microwaves, a microwave generator with variable irradiation direction, and microwave antenas diagonally irradiating against the road face. CONSTITUTION: An asphalt road face 1 is heated and softened by the irradiation of microwaves 9 and a heating and cutting vehicle is advanced to remove deteriorated asphalt 1b by means of a cutter blade 11. The microwaves 9 are diagonally irradiated rearward by a plurality of microwave generators of which height, angle are variable, and a plurality of microwave antenas 10 diagonally opened rearward. As a result, the transmission distance is made longer in the range of an objective depth (d) and hence, the microwaves penetrating deeper than an objective depth (d) and dissipating, are reduced. And since the irradiation direction is variable, the heating can be adjusted in accordance with the work conditions and the leakage to the periphery can be controlled. In this way, the heating efficiency, the working speed, safety, etc., can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt road surface cutting device for irradiating microwaves to a surface layer deteriorated asphalt portion of an asphalt road surface.

[0002]

2. Description of the Related Art Conventionally, in an apparatus for heating and softening deteriorated asphalt on the surface layer of an asphalt road surface by microwave irradiation while running on an asphalt road surface and then cutting and removing it, FIG. As shown in the figure, after heating and softening the deteriorated asphalt 1b on the surface layer of the asphalt road surface 1 by the microwave 9 radiated from the microwave antenna 10 in the enclosure 12 below the heating and cutting vehicle 2 traveling on the asphalt road surface 1. , The cutting blade 11 cuts and removes the dump truck 1
Carried by 6. However, in the device for heating the asphalt road surface 1 with the microwaves 9 as described above, when the asphalt road surface 1 is simply irradiated with the microwaves 9, the absorption of the microwaves 9 into the asphalt is poor.
This tendency is strong in asphalt where the heating efficiency is low, the construction speed is slow, and deterioration has not progressed so much, and there is a risk of uneven heating depending on the deterioration state. In addition, since the microwave 9 has excellent transparency, it is generally 4 to
The portion of sound asphalt 1a that is deeper than the repair target of 5 cm is heated, and a cooling period is required, which lengthens the traffic cutoff period, and there is a risk of leakage to the surrounding area.

[0003]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above circumstances, and it is possible to increase the propagation distance of microwaves in the range of the target depth so that the microwave penetrates deeper than the target depth. Asphalt road surface that can reduce microwave loss, improve heating efficiency and construction speed, enable heating adjustment according to asphalt condition, and ensure controllability to peripheral leakage An object is to provide a cutting device.

[0004]

To this end, the present invention is an apparatus for heating and softening deteriorated asphalt on the surface of the asphalt road surface by microwave irradiation and then cutting and removing it while traveling on the asphalt road surface. A cutting blade for cutting and removing deteriorated asphalt, and a plurality of microwave generators provided with a mechanism for independently changing the microwave irradiation direction to an arbitrary angle,
It is characterized by comprising a plurality of microwave antennas connected to the microwave generator via a waveguide and installed so as to irradiate microwaves obliquely to the asphalt road surface in the cutting blade direction. .

[0005]

In the asphalt road surface cutting device of the present invention,
By opening multiple microwave antennas diagonally in the cutting blade direction, the oscillated microwaves are radiated obliquely to the asphalt road surface, increasing the propagation distance within the target depth and cutting blade surface. Reflected at. Moreover, the microwave irradiation angle can be arbitrarily set by a mechanism in which each microwave antenna independently changes the irradiation direction.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the asphalt road surface cutting device of the present invention will be described with reference to the entire device side view of FIG. 1 and the heating cutting part side view of FIG. The heating and cutting vehicle 2 placed on the surface of the asphalt road surface 1 composed of the healthy asphalt 1a and the deteriorated asphalt 1b can be self-propelled by operating in the driver's cab 3. The microwave generator 4, the generator 5, and the operation panel 6 for operating these devices are mounted. As shown in FIG. 2, each microwave generator 4 is supported by a plurality of electric jacks 7 and has a structure in which the height and the angle are independently variable.

Below the heating and cutting vehicle 2, a plurality of microwave antennas 10, each of which is connected to each microwave generator 4 by a waveguide 8 and irradiates a microwave 9, are obliquely rearward in the opening direction. It is installed towards. A cutting blade 11 is installed behind the microwave antenna 10. These microwave antennas 1
The 0 and the cutting blade 11 are covered with an enclosure 12 in order to prevent noise during cutting, prevent heat from spreading, and prevent leakage of the microwave 9. Further, an intersection 13 between each microwave generator 4 and the enclosure 12 of the waveguide 8 that connects the microwave antenna 10 is shown in FIG.
As shown in FIG. 5, a slight gap 14 is provided so that the angle can be changed, and the metal net 15 has a structure in which radio wave leakage does not occur. A loader 17 for loading the cut deteriorated asphalt 1b on the dump truck 16 is mounted on the heating and cutting vehicle 2.

In such an apparatus, at the time of construction, the microwave 9 oscillated from each microwave generator 4 is applied to the asphalt road surface 1 from each microwave antenna 10 through the waveguide 8. At this time, since the opening direction of the microwave antenna 10 is directed obliquely rearward, the microwave 9 is applied to the cutting blade 11 with respect to the asphalt road surface 1.
It is irradiated diagonally to the direction. Further, in order to secure the microwave propagation distance within the target depth d (4 to 5 cm) as much as possible by adjusting the electric jack 7, the microwave antenna 10 located away from the cutting blade 11 is irradiated with a sharper angle. To do. Further, in the vicinity of the cutting blade 11, irradiation toward the cutting blade 11 and reflection of the microwave 9 by the cutting blade 11 are utilized to reduce loss and leakage of the microwave 9 to the rear.

However, the irradiation of the microwave 9 heats and softens the asphalt road surface 1. The asphalt road surface 1 that has been softened by heating is
It is cut by a cutting blade 11 behind the microwave antenna 10. The deteriorated asphalt 1b that has been cut is collected and conveyed by the loader 17, loaded on the dump truck 16 at the rear of the heating and cutting vehicle 2, and conveyed to an asphalt regeneration plant or the like. By continuously applying this heating cutting as the heating cutting vehicle 2 advances, the deteriorated asphalt 1b having the width of the cutting blade 11 can be cut and removed.

Thus, in such a device, a plurality of microwave generators 4 whose height and angle are variable and a plurality of microwave antennas 10 which are obliquely opened rearward.
Thus, the microwaves 9 can be radiated obliquely rearward, and as a result, the propagation distance in the range of the target depth d can be increased, and the microwaves 9 that penetrate and are lost in a deeper portion than the target depth d.
Can be reduced, and heating efficiency and construction speed can be improved. Further, by making the irradiation direction of the microwave 9 variable, adjustment corresponding to overheating or insufficient heating due to changes in the state of asphalt or construction conditions can be performed, and controllability to peripheral leakage can be secured.
Furthermore, the measurement technology of road width and unevenness of road surface and cutting blade 1
By combining with the slide mechanism of No. 1 and the like, it becomes possible to cope with changes in road width and road surface unevenness.

[0011]

In summary, according to the present invention, in a device for removing deteriorated asphalt on the surface layer of the asphalt road surface by heating and softening it by microwave irradiation while traveling on the asphalt road surface, the deteriorated asphalt heat-softened by microwaves is removed. A cutting blade for cutting and removing a plurality of microwave generators provided with a mechanism for independently changing the microwave irradiation direction to an arbitrary angle, and connected to the microwave generator via a waveguide. By having a plurality of microwave antennas installed so as to irradiate microwaves diagonally to the cutting blade direction with respect to the asphalt road surface, it is possible to lengthen the propagation distance of microwaves in the range of the target depth. , It is possible to reduce the microwave that penetrates and loses deeper than the target depth, improving heating efficiency and construction speed. It is to be able, together with the further it is possible to heat adjustment according to the state of the asphalt, from getting even asphalt road cutting device which can ensure the control of the peripheral leakage, the present invention is extremely useful industrially.

[Brief description of the drawings]

FIG. 1 is a side view of the entire asphalt road surface cutting device according to an embodiment of the present invention.

FIG. 2 is a side view of the heating cutting unit of the above.

FIG. 3 is a side view of the entire device in a conventional asphalt road surface cutting device.

FIG. 4 is a side view of the heating cutting unit of the above.

[Explanation of symbols]

 1 Asphalt road surface 1a Healthy asphalt 1b Degraded asphalt 2 Heated cutting vehicle 3 Driver's cab 4 Microwave generator 5 Generator 6 Control panel 7 Electric jack 8 Waveguide 9 Microwave 10 Microwave antenna 11 Cutting blade 12 Enclosure 13 Intersection 14 Gap 15 Metal net 16 Dump truck 17 Loader

Claims (1)

[Claims] 1. A cutting blade for cutting and removing deteriorated asphalt heat-softened by microwaves in a device for heating and softening deteriorated asphalt on the surface of the asphalt road surface by microwave irradiation while running on the asphalt road surface. , A plurality of microwave generators provided with a mechanism for independently changing the microwave irradiation direction to an arbitrary angle, and the cutting blades connected to the microwave generators via a waveguide for an asphalt road surface An asphalt road surface cutting device, comprising: a plurality of microwave antennas installed so as to irradiate microwaves obliquely in a direction.