JPH1046521A - Laying-leveling machine of asphalt-mixed material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laying-leveling device by which constant quality pavement can be performed by improving permeation of emulsion, and controlling decomposing speed of the emulsion. SOLUTION: A traveling vehicle is made to travel while blowing out a hot blast toward a roadbed 6 from blowout nozzles 10 and 20, and emulsion N is sprayed on the roadbed 6 from a spray nozzle 4, and an asphalt-mixed material A is sent out onto its sprayed emulsion N by a spreading screw 3b, and is laid and leveled by a screed 5. Since an emulsion unsprayed roadbed 6 and the emulsion N sprayed by the spray nozzle 4 are heated by a hot blast blown out of the blowout nozzles 10 and 20, even if an air temperature is low or a wind is strong, the emulsion N excellently permeates into the roadbed 6 and the asphalt-mixed material A without being cooled, and integrally joins both together. Therefore, pavement can be performed by keeping a prescribed quality without being influenced by an outside air temperature and a wind.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leveling machine such as an asphalt finisher, a repaver or a remixer for spreading an asphalt mixture on a lower road surface.

[0002]

2. Description of the Related Art Asphalt mix is used as a leveling machine to spread an asphalt mix on an unpaved roadbed, an asphalt pavement, a cut surface thereof, a concrete pavement, or the like, and is used for a traveling vehicle. A hopper to be contained, an asphalt mixture delivery device, an emulsion spray nozzle, and a screed are provided, and the asphalt mixture is delivered from the hopper by the spray nozzle while the emulsion is sprayed on the lower road surface. Is spread on a spray emulsion and spread with a screed (Japanese Patent Laid-Open No. 4-20300).
No. 6, U.S. Pat. No. 5,069,578).

[0003] According to the above leveling machine, an asphalt distributor (for example, a dedicated sprayer of emulsion)
Asphalt pavement can be performed at low cost comprehensively without using Japanese Utility Model Publication No. 1-1775).

[0004]

However, the above-mentioned conventional asphalt mixture leveling machine has only an emulsion spray nozzle and auxiliary equipment such as a pump and an emulsion tank for pumping the emulsion to the nozzle. In addition, there is a problem that the decomposition speed of the sprayed emulsion is affected by the outside air temperature and wind, and as a result, the adhesive strength of the emulsion is affected.

[0005] It is an object of the present invention to provide an asphalt mixture leveling machine capable of controlling the decomposition rate of an emulsion to perform pavement of constant quality.

[0006]

Means for Solving the Problems In order to achieve the above object, an asphalt mixture leveling machine according to the present invention comprises:
A spray nozzle for spraying the emulsion on the lower road surface, a delivery device for delivering the asphalt mixture from the delivery unit onto the emulsion sprayed by the spray nozzle, and a delivery device for delivering the emulsion onto the emulsion by the delivery device. In the asphalt mixture leveling machine provided with the screed for spreading the asphalt mixture, heating means for heating the emulsion sprayed on the lower road surface is provided between the spray nozzle and the delivery section. Configuration.

It is preferable to provide a heating means for heating the lower road surface immediately before the spray nozzle. The heating means may be a jet nozzle for jetting hot air or a heater for heating the emulsion or the lower road surface by radiant heat.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. FIG. 1 to FIG. 4 show an embodiment of the asphalt mixture leveling machine according to the present invention.
This leveling machine is an asphalt finisher. A self-propelled traveling vehicle 1 has a hopper 2 containing an asphalt mixture A, an asphalt mixture delivery device 3, and a spray nozzle 4 for emulsion (asphalt) N. The screed 5 is provided, and while the emulsion N is sprayed on the unpaved roadbed 6 by the spray nozzle 4, the asphalt mixture A is sent out from the hopper 2 and sent out onto the sprayed emulsion N on the roadbed 6 by the device 3. The screed 5 spreads the structure.

The delivery device 3 includes a bar feeder 3a for carrying out the asphalt mixture A from the hopper 2, and a spreader for spreading the asphalt mixture carried by the bar feeder 3a in the width direction of the traveling vehicle 1 and sending the asphalt mixture onto the roadbed 6. And a dengue screw (delivery unit) 3b. The spray nozzle 4 and the screed 5 are provided on the left and right, respectively, so as to be extendable and retractable in front and rear, so that the spray width of the emulsion N and the spread width of the asphalt mixture A can be arbitrarily adjusted. ing. The traveling vehicle 1 in the figure is a crawler type, but there is also a wheel type.

The spray nozzle 4 has a duct structure and is provided in front of the spreading screw 3b. Also, between the spray nozzle 4 and the spreading screw 3b and immediately before the spray nozzle 4, a hot air jet nozzle (heating means) 1 is provided.
0 and 20 are provided. The hot-air jet nozzle 10 heats the emulsion N sprayed on the roadbed 6 by the spray nozzle 4, and the other hot-air jet nozzle 20 heats the roadbed 6 on which the emulsion N is not sprayed.

The hot air jet nozzles 10 and 20 have a duct structure, and are connected to a burner 12 by a conduit 11.
The burner 12 is informed of the blower 13 and the burner 1
The hot air generated in 2 is ejected through a conduit 11 through jet nozzles 10 and 2
0, and by spraying downward from the ejection holes 10a and 20a on the lower surface, it is possible to heat the sprayed emulsion N on the roadbed 6 or the roadbed 6 on which the emulsion is not sprayed.
Reference numeral 14 denotes a fuel tank of the burner 12.

Like the spray nozzle 4, the hot-air jet nozzles 10 and 20 are provided in a pair of left and right and front and rear, respectively, so as to be able to expand and contract. The spray nozzle 4 and the hot-air jet nozzles 10 and 20 are screed 5 on the outside of each other.
Of the screed 5 is directly or indirectly supported via an arm or the like.
It is structured to expand and contract together with.

In the asphalt finisher configured as described above, the traveling vehicle 1 is driven while hot air is blown from the jet nozzles 10 and 20 toward the roadbed 6, and the emulsion N is sprayed onto the roadbed 6 from the spray nozzles 4. Then, the asphalt mixture A is fed out onto the spraying emulsion N by the spreading screw 3b and spread by the screed 5.

In the above-mentioned leveling work, the hot air blown from the jet nozzles 10 and 20 heats the roadbed 6 where the emulsion is not sprayed and the emulsion N sprayed by the spray nozzle 4, so that the temperature is low or Even if the wind is strong, emulsion N
Satisfactorily penetrates into the roadbed 6 and the asphalt mixture A without being cooled, and joins them together. For this reason, paving can be performed while maintaining a predetermined quality without being affected by the outside air temperature or the wind.

The hot air blown from the blowing nozzle 20 removes moisture from the roadbed 6, so that the pavement is further improved. When only moisture is removed without heating the roadbed 6,
The burner 12 is stopped, and only the blower 13 is operated, so that normal-temperature air is ejected from the ejection hole 20 a of the ejection nozzle 20.

FIG. 5 shows another heating means (heater) 18. This heater heats the roadbed 6 and the like by radiant heat, and uses a heater that flows hot air through a duct or a heating board, an electric heater, a burner, or the like. The heating means provided in front of the spray nozzle 4 may have a structure in which the flame directly contacts the roadbed 6.

The heating means provided before and after the spray nozzle 4 may be of the same type or different types. One can be a hot air jet nozzle and the other can be a heater.

The specific structure of the nozzles 4, 10, 20 and the heater 18 is arbitrary, and the present invention is not limited to the two-stage telescopic structure of the embodiment shown in FIG. In some cases, the structure may not be able to expand and contract. When the nozzles 4, 10, and 20 are made expandable and contractible, one of the nozzle openings (the ejection holes 10a, 2
0a) is usually made openable and closable by a shutter or a valve,
The spraying of the emulsion N and the heating of the roadbed 6 and the like are made uniform over the entire width of the nozzles 4, 10, and 20 by closing one nozzle opening of the polymerization portion. As described above, the case where the asphalt mixture is spread on the unpaved roadbed 6 as the lower road surface has been described, but the same level is similarly spread on the lower road surface such as the asphalt pavement, the cut surface thereof, and the concrete pavement. Can be implemented.

The emulsion N which is sprayed by the spray nozzle 4 to form a waterproof / adhesive layer (bonding layer) is mainly made of asphalt in a molten state. In the present invention, the type and the mixing ratio of the emulsion or the spraying are used. The amount is arbitrary. In addition, the present invention can be applied to a leveling machine other than the asphalt finisher, such as a repeaver or a remixer. A heating means may not be provided before the spray nozzle 4.

[0020]

As described above, the asphalt mixture leveling machine according to the present invention provides a traveling vehicle with a spray nozzle for spraying the emulsion on the lower road surface, and a spray nozzle for spraying the emulsion on the lower surface of the road. A delivery device for delivering the asphalt mixture from the delivery unit, and an asphalt mixture leveling machine provided with a screed for spreading the asphalt mixture delivered onto the emulsion by the delivery device,
Since the heating means for heating the emulsion sprayed on the lower road surface is provided between the spray nozzle and the delivery section, even if the outside air temperature is low or the wind is strong, the Pavement can be performed favorably without being adversely affected.

If the heating means for heating the lower road surface is provided immediately before the spray nozzle, the lower road surface is heated not only before the emulsion is sprayed but also when it is wet with rainwater or the like. As a result, the pavement is further improved because moisture is removed.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of an asphalt mixture leveling machine according to the present invention.

FIG. 2 is a plan view of the leveling machine of FIG. 1;

FIG. 3 is a diagram showing a relationship between a spray nozzle, a jet nozzle, and the like.

FIG. 4 is a partially broken view showing a relationship between an ejection nozzle, a burner, and the like.

FIG. 5 is a diagram of a heater.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 traveling vehicle 3 delivery device 3b spreading screw (delivery unit) 4 spray nozzle 5 screed 6 roadbed (lower road surface) 10 ejection nozzle (heating means) 10a ejection hole 18 heater (heating means) 20 ejection nozzle (heating means) ) 20a Orifice A Asphalt mixture N Emulsion

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuyoshi Sato 730, Gunma-cho, Gunma-cho, Gunma Prefecture Inside the Takasaki Plant of Niigata Iron Works (72) Inventor Mitsuaki Naito 1-19-11 Kyobashi, Chuo-ku, Tokyo Inside Nihon Hodo Co., Ltd. (72) Inventor Tohru Saito 1-19-11 Kyobashi, Chuo-ku, Tokyo Nihon Hodo Co., Ltd. (72) Inventor Ichiro Miyazaki 1-19-11 Kyobashi, Chuo-ku, Tokyo Nihon Hodo Co., Ltd. In company

Claims (4)

[Claims] 1. A spray nozzle for spraying an emulsion on a lower road surface to a traveling vehicle, a delivery device for delivering an asphalt mixture from a delivery section onto the emulsion sprayed by the spray nozzle, and a delivery device for In an asphalt mixture leveling machine provided with a screed for spreading the asphalt mixture sent out on the emulsion, the emulsion sprayed on the lower road surface is heated between the spray nozzle and the delivery section. An asphalt mixture leveling machine provided with a heating means for heating. 2. A heating means for heating a lower road surface is provided immediately before the spray nozzle.
The asphalt mixture leveling machine as described. 3. The asphalt mixture leveling machine according to claim 1, wherein the heating means is a jet nozzle for jetting hot air. 4. The asphalt mixture leveling machine according to claim 1, wherein the heating means is a heater for heating the emulsion or the lower road surface by radiant heat.