JPH10147908A - Construction method for spreading asphalt mixtures and spreading machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spreading machine of asphalt mixtures which sprays liquid or solid materials without using another machine when liquid or solid materials need to be sprayed on a surface spread by a screed for a certain purpose such as finish. SOLUTION: A spreading machine of asphalt mixtures includes a traveling vehicle 1 which is provided with a bar feeder 3 feeding asphalt mixtures on a base course 6 from a feeding part, and screed 5A and 5B spreading asphalt mixtures feeded on the base course 6 by the bar feeder 3. Then, spraying devices 7A and 7B spraying liquid or solid materials are provided behind the screed 5A and 5B.

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 mixture is used as a leveling machine to spread and spread asphalt mixture on an unpaved roadbed, an asphalt pavement, a cut surface thereof, and a concrete pavement, etc. A hopper, an asphalt mixture delivery device, an emulsion dispersing device, and a screed are provided.The asphalt mixture is dispersed from the hopper onto the lower road surface while the emulsion is being dispersed on the lower road surface by the disperser. There is known a device which is sent out by a sending device and spread by a screed (JP-A-4-203006,
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, in the conventional asphalt mixture leveling machines including those having the above-mentioned structure, a liquid or liquid for some purpose such as finishing is applied to a leveling surface spread with a screed. When it is necessary to spray solids, it is necessary to spray with a separate spraying machine, and the pavement construction work must be performed in two stages,
Not only does the work become complicated, but also because the spraying machine runs on the pavement surface, the finishing accuracy of the finished surface becomes insufficient. In this respect, there is room for further improvement including cost. This problem is the same in a general asphalt finisher or the like which does not have an emulsion dispersing device in front of a position where the asphalt mixture is spread on the lower road surface by the delivery device.

Accordingly, the present invention provides a method for spraying a liquid or a solid on a spread surface spread with a screed without using a separate spraying machine even when it is necessary to spray a liquid or a solid for some purpose such as finishing. An object of the present invention is to provide an asphalt mixture leveling machine capable of spraying solids.

[0006]

In order to achieve the above object, a method for leveling an asphalt mixture according to the first aspect of the present invention is to spread an asphalt mixture on a lower road surface by a leveling machine. After the leveling, a liquid or a fixed material is sprayed on the pavement surface of the leveled asphalt mixture while maintaining a certain distance from the leveling portion.

According to a second aspect of the present invention, there is provided an asphalt mixture leveling machine, comprising: a delivery device for delivering an asphalt mixture from a delivery portion to a lower road surface to a traveling vehicle; and a lower road surface by the delivery device. In the asphalt mixture leveling machine provided with the screed for spreading the asphalt mixture sent out thereon, a spraying means for spraying a liquid or a solid is provided on the rear side of the screed. And

According to a third aspect of the present invention, in the asphalt mixture spreading machine, the spraying means discharges a liquid or solid, and the discharge port discharges the screed in the width direction of the traveling vehicle. It is characterized by having a plurality of scatter members arranged over the width.

According to a fourth aspect of the present invention, in the asphalt mixture leveling machine, the spraying means includes a spraying member having a plurality of discharge ports for discharging liquid or solid arranged in a width direction of the traveling vehicle. And a plurality of discharge ports are provided so as to be relatively movable in the arrangement direction along the arrangement direction of the discharge ports.

According to a fifth aspect of the present invention, there is provided the asphalt mixture spreader according to the first aspect of the present invention, wherein the dispersing member of the dispersing means is arranged in any one of the plurality of dispersing members in the arrangement direction with respect to the other dispersing members. A collection device is provided for collecting a liquid or a solid discharged from a discharge port in an overlapping portion.

According to a sixth aspect of the present invention, in the asphalt mixture leveling machine, the spraying means selects a plurality of types of discharge ports having different liquid or solid discharge amounts and a type of discharge port for performing discharge. And switching means for selectively switching.

According to a seventh aspect of the present invention, the asphalt mixture leveling machine is characterized in that an emulsion dispersing means for dispersing asphalt emulsion is provided in front of a delivery section of the delivery device. I have.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. FIGS. 1 to 6 show an embodiment of a machine for spreading asphalt mixture according to the present invention.
This leveling machine is an asphalt finisher, and a self-propelled traveling vehicle 1 is provided with a hopper 2 containing asphalt mixture A, a delivery device 3 for asphalt mixture A, and an asphalt mixing device 3 in the delivery device 3. A pair of first spray bars 4A and 4B for asphalt emulsion, which are provided on the front side of the spreading screw 3b, which is a delivery part of the material A, and are provided to be able to expand and contract separately in right and left and front and rear, and a rear side of the spreading screw 3b. And a pair of screeds 5A and 5B which are provided to be able to expand and contract separately in right and left and front and rear.
A pair of second spray bars (spraying means) 7A and 7B are provided on the rear side of A and 5B so as to be able to expand and contract separately in right and left and front and back.
A, 4B, while spraying on unpaved roadbed 6, hopper 2
, The asphalt mixture A is sent out onto the sprayed emulsion on the roadbed 6 by the sending device 3 and spread by the respective screeds 5A and 5B. After the spread, the asphalt emulsion as a finishing material is formed by the second spray bars 7A and 7B. Is sprayed.

The delivery device 3 sends out the asphalt mixture A from the hopper 2 to the asphalt mixture A and the asphalt mixture A carried by the bar feeder 3a in the width direction of the traveling vehicle 1 and sends it out onto the roadbed 6. And the above-mentioned spreading screw 3b. As described above, the first spray bars 4A and 4B and the screeds 5A and 5B are supported by the left and right pair of vehicles 1 and 2 with their positions shifted in parallel in the forward and backward directions of the traveling vehicle 1 as described above.
The width of the emulsion and the width of the asphalt mixture A can be arbitrarily adjusted. The traveling vehicle 1 in the figure is a crawler type, but there is also a wheel type.

Each of the first spray bars 4A and 4B has a duct structure and is provided immediately before the spreading screw 3b.
Also, immediately before the first spray bars 4A, 4B, a pair of suction devices 10A, 10B having a duct structure are provided. Each of the suction devices 10A and 10B is for suctioning and removing moisture from the roadbed 6 through a number of nozzle openings on the lower surface, and is connected to a cyclone-type water / water separator by a flexible suction hose (not shown). Connected to the collection tank.

Like the first spray bars 4A and 4B, each of the suction devices 10A and 10B is provided on the traveling vehicle 1 such that a pair of left and right shift the front and rear positions and extend and contract in the left and right direction. The second spray bars 7A, 7B are provided immediately after each of the screeds 5A, 5B in a duct structure. The second spray bars 7A, 7B are also the first spray bars 4A,
Similarly to 4B, the left and right pair is supported by the vehicle 1 while being displaced in parallel in the front-rear direction of the traveling vehicle 1, and is provided so as to be stretchable in the width direction of the vehicle 1. The width can be adjusted arbitrarily. First spray bars 4A, 4B and suction device 10
A, 10B means that the outer ends of the respective screeds 5A, 5B
Are connected to the side plate 8 (omitted in FIG. 1) and supported by the traveling vehicle 1. When the screeds 5A and 5B expand and contract, they expand and contract together. Also, for the second spray bars 7A and 7B,
Since the outer end is connected to the side plate 8 of the screed 5 and supported by the traveling vehicle 1, each screed 5A,
When the extension and retraction operation of the 5B is performed, the structure can be extended and contracted together. The first spray bars 4A and 4B, the screeds 5A and 5B, the second spray bars 7A and 7B, and the suction devices 10A and 10B may be provided with expansion and contraction drive mechanisms, respectively, so that they can be individually expanded and contracted.

Next, the first and second spray bars 4A, 4B, 7A and 7B will be described in more detail with reference to FIGS. Here, the first spray bars 4A, 4B and the second spray bars 7A, 7B have the same configuration,
Hereinafter, the second spray bars 7A and 7B will be described as an example. The traveling vehicle 1 has a support plate portion 11 extending in the left-right direction and extending downward at both ends in the front-rear direction.
A support member 12 having a U-shaped section is fixedly provided on a support frame of each of the screeds 5A and 5B. Both support plate portions 11 of the support member 12 have inner and outer sides, respectively. A plurality of pairs of grooved support rollers 13 are disposed at appropriate intervals in the left-right direction, and are supported by support shafts 12B, 12B fixed to both support plates 11 toward the traveling direction of the traveling vehicle 1. It is provided so as to be rotatable in the direction. Each of the inner support rollers 13 engages with the groove thereof with the upper and lower ridges of a slide member 14 extending in the left-right direction of the traveling vehicle 1 so as to be movable substantially horizontally only in the left-right direction. The slide member 14 is supported, and a front second spray bar 7A extending in the left-right direction is fixed to a lower portion of the slide member 14 via a connecting piece 14A. An outer support roller 13 provided on the rear side of the support member 12 supports a rear slide member 15 extending in the left-right direction of the traveling vehicle 1 so as to be movable substantially horizontally only in the left-right direction. An outer support roller 13 provided in front of the support member 12 supports a front slide member 16 extending in the left-right direction so as to be movable substantially horizontally only in the left-right direction.

The lower side of the rear slide member 15 is parallel to the length of the front second spray bar 7A in the longitudinal direction,
The rear second spray bar 7 </ b> B is fixed via the connecting member 17 with the position shifted to the rear side. A connecting member 18 is fixed to the rear second spray bar 7B, and a rectangular parallelepiped with an open top is provided between the connecting member 18 and the connecting member 19 fixed to the front slide member 16. The collection box 20 is fixed. As a result, the slide member 15, the connecting member 17, and the rear second
Spray bar 7B, connecting member 18, collection box 20,
The connecting member 19 and the front slide member 16 are integrally formed. Each of the second spray bars 7A and 7B is provided with a plurality of pairs of first and second nozzles 40 and 41 having different diameters of ejection ports (discharge ports) at equal intervals along the length direction. They are arranged and attached with the ejection direction facing downward.

Each of the second spray bars 7A and 7B has a duct structure, and the inside thereof is connected to the emulsion tank 22 by an introduction pipe 23 as shown in FIG. Then, the asphalt emulsion sucked from the emulsion tank 22 through the filter 23A by the spray pump 24 provided in the introduction pipe 23 is supplied to each of the second spray bars 7A and 7B.
By being introduced into the inside of each of the second spray bars 7
A, 1st, 2nd nozzles 40 and 4 communicating with the inside of 7B
1 to eject an asphalt emulsion. The nozzles 40, 41 are provided with first and second opening / closing cylinders (switching means) 40a, 41a for switching the opening and closing of the respective ejection ports.

The first opening / closing cylinder 40a of the first nozzle 40 having the same diameter is driven by pneumatic pressure. The first switching valve (switching means) 43 switches one of the air compressors (switching means) 42 from the air compressor (switching means) 42. When air pressure is introduced into the chamber and air pressure is released from the other chamber, the outlet of the first nozzle 40 is closed. Conversely, the air pressure is released from the one chamber by the first switching valve 43 and the other is released. When air pressure is introduced into the chamber, the outlet of the first nozzle 40 is opened. Similarly, in the second opening / closing cylinder 41a of the nozzle 41 having the same ejection port diameter, air pressure is introduced into one chamber from the air compressor 42 by the second switching valve (switching means) 44 and air pressure is supplied from the other chamber. Is released, the outlet of the second nozzle 41 is closed, and conversely, the second switching valve 44 releases the air pressure from the one chamber and introduces the second pressure into the other chamber. The ejection port of the nozzle 41 is opened.

The above-mentioned collection box 20 is connected to the second
The front second spray bar 7A is provided corresponding to the spray bar 7A, and the front second spray bar 7A is located at a portion overlapping the rear second spray bar 7B in the length direction.
Since the spray bar 7A is arranged to face the first and second nozzles 40 and 41, the spray bar 7A receives asphalt emulsion ejected from the first and second nozzles 40 and 41 in the overlapping portion. . Here, the collection box 20 has the same length as the rear second spray bar 7B, and matches the position in the width direction (left-right direction) of the traveling vehicle 1 with that of the rear second spray bar 7B. In this state, it is fixed to the rear second spray bar 7B.
Thereby, regardless of the relative movement position of each of the second spray bars 7A, 7B, the front second spray bar 7
A receives the asphalt emulsion ejected from each of the nozzles 40 and 41 at the portion overlapping the second spray bar 7B on the rear side.

An excess collection pipe 27 is connected to the bottom of the collection box 20. The excess recovery pipe 27 communicates with the emulsion tank 22, and the emulsion in the recovery box 20 is filtered by an excess recovery pump 28 provided on the way.
The liquid is sucked through A and returned to the emulsion tank 22. A collecting device 30 for collecting the asphalt emulsion surplus is constituted by the collecting box 20, the surplus collecting pipe 27, the surplus collecting pump 28 and the like.

Here, the spray pump 24 and the surplus recovery pump 28 are hydraulically driven pumps, and are supplied from a hydraulic pump 47 driven by a diesel engine 46 via pipes 47B and 47C branched by a distribution valve 47A. And the rotation is performed by the operating oil.
C is adjusted by variable flow valves 47D and 47E provided in C. The diesel engine 46 also drives a hot oil pump 48 for circulating hot oil. The recovery box 20 has a heater 29 comprising an oil jacket for heating the asphalt emulsion received with the hot oil. Are provided on the bottom surface, the periphery, or both. The working oil and the hot oil are shared, and thus the storage oil tank 49 is also shared by one. The heater 29 is connected to the collection box 20.
It may be formed by a flexible tube piped inside. Further, the diesel engine 46 also drives the generator 51, and the power generated by the generator 51
The asphalt emulsion in the emulsion tank 22 is supplied to the electric heater 52.
Thus, the oil in the oil tank 49 is heated by the electric heater 53, respectively. In FIG. 5, reference numeral 31 denotes a circulation pipe for circulating the asphalt emulsion in order to maintain the fluidity when both nozzles 40 and 41 are closed so as to stop the spraying of the emulsion. An on-off valve 32 is provided which is opened when the air is circulated and closed at other times. The on-off valve 32
Are operated by compressed air supplied from an air compressor 42.

In the asphalt finisher described above, the delivery device 3, spray pump 2
4, when the surplus recovery pump 28 is operated and the traveling vehicle 1 is caused to travel forward, the emulsion is sprayed on the roadbed 6 by the first spray bars 4A and 4B on the front side, and the emulsion is sprayed from the hopper 2 by the bar feeder 3a. The asphalt mixture A sent to the rear of the traveling vehicle 1 is spread by the spreading screw 3b on the sprayed emulsion on the roadbed 6, spread by the screeds 5A and 5B, and asphalt pavement is performed. Then, as shown in FIG. 6, the asphalt emulsion was further spread on the pavement surface of the asphalt mixture A, and immediately after the pavement, the asphalt emulsion was sprayed with the second spray bars 7A and 7B provided on the rear side of the screeds 5A and 5B. Is sprayed. Accordingly, the asphalt emulsion is infiltrated from the pavement surface into the asphalt mixture A, and the asphalt emulsion filling layer 55 is spread over the entire pavement thickness in combination with the infiltration from below the asphalt emulsion sprayed on the roadbed 6. Since it can be formed to increase the bonding strength between aggregates, the strength of the pavement can be ensured even when the pavement thickness is large. In the above, when each screed 5A, 5B expands and contracts in the width direction of the traveling vehicle according to the required pavement width, the second spray bars 7A, 7B also expand and contract in the same direction together with the screeds 5A, 5B, and asphalt. The dispersion width of the emulsion is adjusted to match the pavement width.

By adjusting the spray width, the nozzles 40 and 4 in the portion of the front second spray bar 7A which overlaps the rear second spray bar 7B in the length direction.
The asphalt emulsion ejected from 1 is collected in the collection box 2
0, and is returned to the emulsion tank 22 via a surplus recovery pipe 27 by a surplus recovery pump 28. Therefore, even if the spray width of the asphalt emulsion is changed, by collecting the surplus by the collecting device 30, the nozzles 40 of the portion of the front second spray bar 7A that overlap the rear second spray bar 7B are collected. , 41 can be kept constant without closing, so that the spray density can be made uniform without complicated adjustment work. In addition,
This is the same for the first spray bars 4A and 4B having the same structure.

Further, all the first nozzles 40 are opened by the first switching valve 43, and all the second nozzles 41 are closed by the second switching valve 44. When the asphalt emulsion is supplied to the spray bars 7A and 7B, the asphalt emulsion is sprayed from only the plurality of first nozzles 40 having the same diameter at an injection amount corresponding to the diameter of the ejection port. Accordingly, when the injection amount of the asphalt emulsion is changed from the above state, all the first nozzles 40 are switched by the first switching valve 43.
Is closed, all the second nozzles 41 are opened by the second switching valve 44, and the asphalt emulsion is supplied to each of the second spray bars 7A and 7B by the spray pump 24. The asphalt emulsion is sprayed from only a plurality of second nozzles 41 having different diameters and having the same diameter according to the diameter of the nozzle. As described above, the two types of first and second nozzles 40 and 41 having different injection amounts due to the different diameters of the injection ports,
The type of the nozzle for injecting the asphalt emulsion, that is, the first nozzle 40 or the first nozzle 4
0, an air compressor 42 for selectively switching whether to use a second nozzle 41 having a different diameter of the ejection port, first and second switching valves 43 and 44, and first and second opening / closing cylinders 40a and 41a. Therefore, even if it is necessary to change the injection amount of the asphalt emulsion, the air compressor 42, the first and second switching valves 43 and 44, and the first and second opening / closing cylinders 40a and 41a By switching the type of the nozzles 40 and 41 for jetting the asphalt emulsion, it is possible to change the jetting amount of the asphalt emulsion, and therefore, it is necessary to replace the nozzle with a type having a different jetting amount. In addition, the injection amount of the asphalt emulsion can be easily changed. The same applies to the first spray bars 4A and 4B having the same structure. In the above case, when the work is temporarily stopped, the first and second switching valves 43 and 44 are switched so that the first and second opening / closing cylinders 40a and 40 are switched.
When all the first and second nozzles 40 and 41 are closed via 1a and the on-off valve 32 of the circulation pipe 31 is opened, the asphalt emulsion supplied from the spray pump 24 to each of the spray bars 4A and 4B becomes The asphalt mixture is returned to the emulsion tank 22 through the circulation pipe without being sprayed on the evenly paved surface.
And the second spray bar 7A, 7B. Therefore, when the application of the asphalt emulsion to the pavement surface is stopped, the introduction pipe 23, the second spray bars 7A, 7B
Inconveniences such as a decrease in fluidity due to stagnation in the inside of the device are eliminated. In the above embodiment, the collection box 20 is provided in the second spray bar 7B on the rear side to collect the surplus of asphalt emulsion from the second spray bar 7A on the front side. 2 spray bar 7
A may be provided with a collection box 20 so as to collect the surplus asphalt emulsion from the second spray bar 7B on the rear side.

In the embodiment described above, the asphalt emulsion is placed on the first side of the front side of the spreading screw 3b.
Although the case where the spray bars 4A and 4B and the second spray bars 7A and 7B on the rear side of the screeds 5A and 5B are spread before and after spreading has been described as an example, the following changes are possible. The screed 5A in the traveling vehicle 1,
The second spray bars 7A, 7B are provided only on the rear side of the screeds 5A, 5B without providing the first spray bars 4A, 4B on the front side of 5B, and the asphalt emulsion is screed 5A, 5B with the second spray bars 7A, 7B. Spray only after leveling in. In the above embodiment, the asphalt emulsion as a liquid is sprayed by the second spray bars 7A and 7B on the pavement surface of the asphalt mixture spread and spread by the screeds 5A and 5B.
The resin emulsion is not limited to the asphalt emulsion, and may be a resin emulsion (which may be colored by adding a pigment) which is a liquid in which solids emulsified in the same manner as the asphalt emulsion are dispersed. For example, by spraying an acrylic emulsion as the resin emulsion, the bonding strength of the pavement surface is increased to prevent the aggregate from being scattered, which is useful for reinforcing the road surface. Further, as the liquid, a suspension (suspension) which is a liquid in which fine solids are dispersed, for example, a stone powder suspension, a cement milk or a slurry obtained by adding water to a granular material (liquid-containing fluid) ). When a suspension obtained by dispersing limestone powder in water is used as the stone powder suspension, when the pavement surface is subjected to roller compaction, it is possible to prevent the pavement material from adhering to the rollers, and the cement milk is If a rubber emulsion or a resin emulsion is added and used as required, especially in the case of a pavement surface made of an open-mixed mixture, cement milk is filled in the pavement surface voids, and the semi-flexible pavement surface is formed by rolling. When a slurry composed of fine aggregate, filler, asphalt emulsion, or the like is used as the slurry, a pavement surface whose upper layer is smoothly finished can be obtained. Further, the liquid may be a liquid containing no solid, for example, water or a liquid resin (which may be colored by adding a pigment). When the water is used, the spreading temperature is high, and when the temperature drop is slow, the cooling of the pavement surface can be accelerated, and the rolling pressure by the roller can be started quickly. The same effect is obtained as when an emulsion resin material is used. In the above embodiment, the liquid is sprayed by the spraying means including the second spray bars 7A and 7B on the pavement surface of the asphalt mixture spread and spread by the screeds 5A and 5B. Is also good. As solid, particle size 0.074m
m, a fine aggregate mainly composed of 0.074 to 5 mm in diameter, and a coarse aggregate mainly composed of 5 to 20 mm in diameter can be used. When the stone powder is used as the powder, it is possible to prevent the pavement material from adhering to the roller during roller rolling. When glass sand made by crushing waste glass is used as fine aggregate, the compacted pavement surface is formed as a good surface finish, and when hard aggregate or metal powder is used, slippage occurs. A pavement surface with increased resistance or increased frictional resistance can be obtained, and when using artificial or natural colored sand,
The finished surface of color pavement can be obtained. When a colored aggregate is used as the coarse aggregate, a color pavement surface can be obtained in the same manner as the above color sand.However, in the case of the coarse aggregate, the one precoated with asphalt or resin is used for the adhesion to the pavement. It is preferable from the viewpoint of enhancing the properties. In the above, the spraying means is appropriately selected according to the type and characteristics of the material to be sprayed,
In the case of a liquid, the second spray bar 7A, 7
B is used, and in case of slurry, blade (rake)
Type or spreader box type is used. For powder, air type or powder spreader type is used. For fine aggregate or coarse aggregate, chip spreader type is used. Are used, but their specific structures are arbitrary. Then, the second spray bars 7A, 7B are provided only on the rear side of the screeds 5A, 5B without providing the first spray bars 4A, 4B on the front side of the screeds 5A, 5B in the traveling vehicle 1, and these second spray bars 7A are provided. , 7B, the colorless emulsion is sprayed only after spreading on the screeds 5A, 5B. As a result, a pavement with a natural aggregate color can be constructed, and the pavement is suitable for parks and hospitals.

Screeds 5A and 5B in traveling vehicle 1
A first spray bar 4A, 4B and a second spray bar 7A, 7B are provided on both sides before and after the asphalt emulsion is sprayed from the first spray bar 4A, 4B on the front side, and the second spray on the rear side as shown in FIG. Colored paint is sprayed from the bars 7A and 7B. This makes it possible to form a surface finish layer 56 colored white or yellow on the surface of a desired pavement for clarifying the division of a sidewalk or a road.
First spray bars 4A, 4B for spraying asphalt emulsion on front sides of screeds 5A, 5B in traveling vehicle 1
And a dispersing device (dispersing means) for dispersing the aggregate is provided on the rear side of the screeds 5A and 5B. Thereby, when the colored aggregate is sprayed from the spraying device on the rear side, it is possible to color the surface of a desired pavement for the purpose of clarifying the division of a sidewalk or a road.

In the above embodiment, an asphalt finisher has been described as an example. However, the present invention can be applied to a leveling machine other than the asphalt finisher, such as a repaver or a remixer.

[0030]

As described above, the asphalt mixture leveling machine according to the present invention is provided with a spraying means for spraying a liquid or a solid behind the screed. Even if it is necessary to spray liquid or solid on the spread surface for some purpose such as finishing, it is easy to spray the liquid or solid with a single machine without using a separate spraying machine Can be
The working efficiency can be improved, and the pavement-finished surface does not run on the paving surface, so that a good condition can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of an asphalt emulsion spraying machine according to the present invention.

FIG. 2 is a plan view of the asphalt emulsion spraying machine of FIG.

FIG. 3 is a perspective view showing a spray bar.

FIG. 4 is a sectional view showing a spray bar and a collecting device.

FIG. 5 is a piping diagram showing a system for spraying and collecting asphalt emulsion.

FIG. 6 is a side view of a main part of the asphalt emulsion spraying machine of FIG. 1;

FIG. 7 is a side view of a main part of another embodiment of the asphalt emulsion spraying machine according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Running vehicle 3 Sending device 3b Spreading screw (delivery part) 4A, 4B Spray bar 5A, 5B Screed 6 Roadbed 7A, 7B Spray bar (spraying means) 40, 41 Nozzle 40a, 41a Opening / closing cylinder (switching means) 42 Air compressor (switching means) 43,44 Switching valve (switching means)

 ──────────────────────────────────────────────────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 Within Nihon Hodo Co., Ltd. (72) Inventor Takayoshi Hayama 1-19-11 Kyobashi, Chuo-ku, Tokyo Nihon Hodo Co., Ltd. In company

Claims (7)

[Claims] Claims 1. An asphalt mixture is spread on a lower road surface by a spreading machine, and the asphalt mixture is spread on a pavement surface of the spread asphalt mixture at a constant distance from the spread portion. Spreading liquid or fixing, asphalt mixture spreading method. 2. A traveling vehicle is provided with a delivery device for delivering an asphalt mixture from a delivery portion onto a lower road surface, and a screed for spreading the asphalt mixture delivered on the lower road surface by the delivery device. An asphalt mixture leveling machine, characterized in that a spraying means for spraying a liquid or a solid is provided behind the screed. 3. The spraying means has a spraying member in which a plurality of discharge ports for discharging liquid or solid are arranged in the width direction of the traveling vehicle over the spread width of the screed. The leveling machine for asphalt mixture according to claim 2. 4. The spraying means, wherein a plurality of spray members having a plurality of discharge ports for discharging liquid or solid arranged in a width direction of the traveling vehicle are arranged along a direction in which the discharge ports are arranged. 4. The leveling machine for asphalt mixture according to claim 3, wherein the leveling machine is provided so as to be relatively movable along the arrangement direction. 5. A spraying member of the spraying means collects a liquid or a solid discharged from a discharge port in a portion overlapping with another spraying member in the arrangement direction to one of the plurality of spraying members. The asphalt mixture leveling machine according to claim 4, further comprising a recovery device. 6. The spraying means comprises a plurality of types of discharge ports having different discharge amounts of liquid or solid, and switching means for selectively switching the type of discharge port for performing discharge. The leveling machine for asphalt mixture according to any one of claims 3 to 5. 7. An asphalt mixture according to claim 2, wherein an emulsion spraying means for spraying asphalt emulsion is provided in front of a delivery section of the delivery device. Lumber leveling machine.