JP2001040615A - Emulsion spraying device in pavement machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a state damaging the strength quality of pavement by falling a plied timber on a bed in which emulsion is not sprayed by arranging a front side spray part more frontward than the front end of a bar conveyor. SOLUTION: A pavement machine 1 is provided with an emulsion spraying device for spraying an emulsion from spray parts 11, 12 to a bed, a bar conveyor 4 for carrying a pavement plied timber from frontward to rearward to supply to the bed, and a screwed device 7 for laying and leveling pavement plied timber. In the pavement machine 1, the front side spray part 11 is arranged frontward from the front end of the bar conveyor 4. Thus, even when the plied timber falls on the bed, the emulsion is already sprayed on the part, and nonconformity producing a part in which the emulsion is not sprayed between the bed and the plied timber is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of pavement machines such as asphalt finishers.

[0002]

2. Description of the Related Art Generally, a paving machine such as an asphalt finisher includes a bar conveyor for transporting a pavement mixture put into a hopper to a rear side of a machine body, a screw conveyor for spreading the conveyed mixture on a base, and a screw conveyor. There are those which are provided with member devices such as a spreading device for spreading the spread mixed material, but in addition to these member devices,
A paving machine equipped with an emulsion dispersing device for dispersing an emulsion for bonding a base and a mixture is disclosed in, for example, JP-A-4-20300.
No. 6 and JP-A-10-72805. In the prior art disclosed in these publications, the emulsion is configured to be sprayed on a base from a spray unit disposed immediately before the screw conveyor.

[0003]

By the way, in the above-mentioned pavement machine, during the return process of the bar conveyor after the mixture put in the hopper is conveyed to the rear of the machine body, it adheres to the bar conveyor and is not dropped on the screw conveyor. The mixed material comes off the bar conveyor and falls onto the base.
However, in the prior art disclosed in the above-mentioned publication, since the spraying unit for spraying the emulsion is disposed immediately before the screw conveyor, the mixture dropped in the return process of the bar conveyor is a substrate on which the emulsion is not sprayed. Will fall on top. As a result, there is a problem in that the adhesion between the base material and the base material that has fallen during the return process of the bar conveyor is weakened, and the strength quality of the pavement is impaired, and there is a problem to be solved by the present invention. .

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present invention has been made with the object of solving these problems, and is intended for spraying an emulsion from a spray unit onto a substrate. An emulsion dispersing apparatus, a bar conveyer for transporting the pavement mixture loaded from the front of the fuselage to the rear of the fuselage and supplying the mixture onto the base on which the emulsion is dispersed, and a pavement mixture supplied by the bar conveyer. In a pavement machine provided with a leveling device for leveling materials, the spray unit is disposed forward of a front end of a bar conveyor. In this manner, even if the mixture falls onto the base during the return process of the bar conveyor, the emulsion is already sprayed on the base by the spray unit disposed forward of the front end of the bar conveyor. This means that there is no problem that there is no place where the emulsion is not scattered between the base and the mixture, and the adhesion between the base and the mixture is strengthened over the entire pavement surface be able to. In this case, by disposing the spray portion behind the bumper provided at the front end of the body of the pavement machine, the spray portion can be effectively protected by the bumper. Further, the spray portion disposed forward of the front end of the bar conveyor is a front spray portion, and a rear spray portion can be further disposed at a position in front of a screw conveyor disposed below the rear end of the bar conveyor. In this case, by setting the emulsion spraying range of the rear spraying part so as not to overlap with the emulsion spraying range of the front spraying part, it is possible to avoid double emulsion spraying and to perform uniform spraying. Can be. Further, by providing the spraying unit with a spray width adjusting means for adjusting the emulsion spray width in the lateral direction of the machine, the emulsion spray width can be adjusted according to the pavement width. Furthermore, the spraying part disposed in front of the front end of the bar conveyor is configured such that the width of the emulsion spraying in the lateral direction of the machine is set to be substantially equal to or wider than the width of the bar conveyer, so that the conveyer of the bar conveyer is conveyed. It is possible to cope with a mixture falling over the entire width. Further, the spraying portion disposed in front of the front end of the bar conveyor is sprayed on the base by setting the emulsion spraying width in the left-right direction of the machine to be within the width of the left-right running locus of the pavement machine running portion. The stepped emulsion can be avoided from being stepped on by the pavement machine traveling section.

[0005]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawing, reference numeral 1 denotes a paving machine for drainage pavement, which pavement machine 1 sprays a highly adherent emulsion on a water-impermeable base, and forms a porous asphalt mixture having a high porosity thereon. A material (hereinafter, simply referred to as a mixture) is laid, and the material is put into the left and right crawler-type traveling bodies 2L, 2R, a hopper 3 disposed in the front of the fuselage, and the hopper 3. A bar conveyor (bar feeder) 4 for transporting the mixture to the rear of the machine, an emulsion dispersing device 5 described later for dispersing the emulsion on the substrate, and a substrate on which the emulsion conveyed by the bar conveyor 4 is dispersed. A screw conveyer (screw spreader) 6 for uniformly dispersing the mixture and a screw device 7 disposed behind the screw conveyer 6 to spread the mixture are provided. The screw device 7 is configured to be expandable and contractible in the left-right direction so that the left-right width can be adjusted according to the pavement width.

The emulsion dispersing apparatus 5 includes an emulsion tank 8 for storing the emulsion, a heater 9 for heating the emulsion in the emulsion tank 8, an emulsion pump 10 for sucking and discharging the emulsion, and dispersing the emulsion on a substrate. Spray units 11, 12 before and after to be described later,
It is composed of member devices such as the emulsion piping 13.

On the other hand, reference numeral 14 denotes a front bumper provided at the front end of the body frame of the pavement machine 1.
A bumper roller 15 is attached to the front surface of 4 to be in contact with a dump truck (not shown) for supplying the mixture. Further, a front spray portion 1 of the front and rear spray portions 11 and 12 is provided on a rear surface portion of the front bumper 14.
1 is attached, but the spray part 11 on the front side
Are arranged at a position forward of the front end of the bar conveyor 4.

[0008] The front spray portion 11 includes a guide rail 16 which is fixed to the rear surface of the front bumper 14 and which faces left and right, a spray bar 17 which is guided by the guide rail 16 to move in the left and right direction, and The spray bar 17
A plurality of nozzles 18 are mounted at predetermined intervals (pitch) in the left-right direction, and members such as air valves 19 for opening and closing the respective nozzles 18 are provided.

The spray bar 17 has a hollow shape, and the emulsion from the emulsion pump 10 is supplied to the inside of the hollow via the emulsion piping 13. The emulsion supplied to the spray bar 17 is set so that the spraying from the nozzle 18 to the base is stopped based on the opening and closing operation of the air valve 19. Here, the nozzle 18 has a jetting shape having a wide elliptical shape in the traveling direction of the pavement machine 1, and the emulsions simultaneously jetted from the nozzles 18 adjacent in the left-right direction are not overlapped. Has become. The spray bar 17 is configured to reciprocate in the left-right direction at a substantially pitch width so that the emulsion is continuously sprayed between the pitches of the nozzles 18, and only when the spray bar 17 moves. 19 is set so that the emulsion is sprayed. Further, the width A of the emulsion sprayed by the front spray unit 11 in the left-right direction is wider than the left-right width B of the bar conveyor 4 and is within the width C of the left-right running locus of the left and right running bodies 2L, 2R. (B <A <C).

On the other hand, the rear spray section 12 is provided in a space formed between the rear ends of the left and right traveling bodies 2L and 2R and the screw conveyor 6, and the above-mentioned front spray section 12 is provided. 11 has substantially the same configuration as that of FIG. 11, but the rear spray unit 12 includes left and right spray bars 19L and 19R provided in a state of being arranged in front and rear, and the respective spray bars 19L and 19R are connected to hydraulic cylinders 20R and 20L. And a left-right width adjustment mechanism for moving the right-left movement based on the expansion / contraction operation of the camera. By moving the left and right spray bars 19L and 19R outward or inward respectively by the left and right width adjusting mechanism, the width of the emulsion sprayed by the rear spray unit 12 in the left and right direction is adjusted in accordance with the pavement width. I can do it.

Here, the nozzles 21 provided on the left and right spray bars 19L, 19R of the rear spray section 12 are provided.
L and 21R are opened and closed so that the emulsion spraying ranges of the left and right spray bars 19L and 19R do not overlap, and that the above-described emulsion spraying range of the front spray unit 11 and the rear spray unit 12 do not overlap. Controlled. That is, the left and right spray bars 19L of the rear spray section 12,
The nozzles 21L and 21R of the 19R do not overlap before and after when the spraying width is maximized, but when the spraying width is narrowed, overlapping portions occur. Therefore, the nozzle 21 of one of the left and right spray bars 19L or 19R is used for the overlapping portion.
By controlling L and 21R to be normally closed,
Overlap of the emulsion spraying range by the left and right spray bars 19L, 19R is avoided. Further, in the same manner, the nozzle 21 of the rear spray unit 12 is used for a portion where the front spray unit 11 and the rear spray unit 12 overlap each other.
By controlling the L and 21R to be normally closed, the emulsion spraying ranges of the front and rear spray units 11 and 12 do not overlap.

Reference numeral 22 denotes a cover body which covers the lower part of the spray units 11 and 12, so that the cover body 22 can prevent the emulsion sprayed from the spray units 11 and 12 from scattering around. It has become.

In the apparatus constructed as described above, the pavement machine 1 scatters the emulsion on the base by the emulsion dispersing device 5, and also mixes the mixed material that has been put into the hopper 3 and conveyed to the rear of the machine by the bar conveyor 4. The above-mentioned emulsion is spread evenly on the substrate on which the emulsion is spread by the screw conveyor 6 and spread by the screw device 7. In this case, the spray units 11 and 12 for spraying the emulsion are airframes. , That is, the front spray portion 11 is disposed forward of the front end of the bar conveyor 4, and the rear spray portion 12 is disposed in front of the screw conveyor 6. The width A of the front side spray unit 11 in the lateral direction of the machine is larger than the lateral width B of the bar conveyor 4 and the width of the right and left traveling bodies 2.
L and 2R are set to be within the width C of the traveling locus.

As a result, even if the mixture separated from the bar conveyor 4 falls on the base during the return process of the bar conveyor 4, the emulsion is sprayed on the base from the front spray unit 11 prior to the bar conveyor 4. As a result, there is no place where the emulsion is not sprayed between the base and the mixture as in the past, and the adhesion of the base and the mixture over the entire pavement surface is prevented. Can be strengthened.

Further, in this apparatus, the emulsion spraying width A of the front spray unit 11 in the lateral direction of the machine is set to be wider than the lateral width B of the bar conveyor 4, so that the emulsion spray falls over the entire lateral width of the bar conveyor 4. We can cope with mixture. Further, the emulsion spraying width A of the front spray unit 11 is set so as to be within the width C of the running locus of the left and right running bodies 2L and 2R, so that the emulsion sprayed by the front spray unit 11 moves left and right. Stepping on the bodies 2L and 2R can be avoided. And the front spray unit 11
In the range where the emulsion spraying is not performed, the emulsion is sprayed by the rear spraying unit 12. In this case, the emulsion spraying ranges of the front spraying unit 11 and the rear spraying unit 12 are set so as not to overlap. Has been
Emulsion can be performed evenly without the emulsion being sprayed twice.

The present invention is, of course, not limited to the above-described embodiment.
Regarding control, the spray shape of the nozzle is circular or elliptical wide in the left-right direction, the front spray part can be adjusted for the emulsion spray width, the emulsion spray between the front spray part and the rear spray part Various forms such as controlling the width to overlap as needed can be adopted as appropriate.

[Brief description of the drawings]

FIG. 1 is a side view of a paving machine.

FIG. 2 is a plan view of the paving machine.

FIG. 3 is a front view of the paving machine.

FIG. 4 is a side view showing the emulsion dispersing device.

FIG. 5 is a plan view showing an emulsion dispersing apparatus.

FIG. 6 is a rear view of the front spray unit.

FIG. 7 is an enlarged sectional view taken along line XX of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pavement machine 2L, 2R Left and right running bodies 4 Bar conveyor 5 Emulsion dispersing device 6 Screw conveyor 7 Screw device 11 Front spray unit 12 Rear spray unit 14 Front bumper 20R, 20L Hydraulic cylinder

Claims (7)

[Claims] 1. An emulsion dispersing device for dispersing an emulsion from a spraying unit onto a base, and a pavement mixture loaded from the front of the fuselage is transported to the rear of the fuselage to be supplied onto the base on which the emulsion is dispersed. A pavement machine provided with a bar conveyer and a leveling device for leveling a pavement mixture supplied by the bar conveyer, wherein the spray unit is disposed forward of a front end of the bar conveyer. An emulsion dispersing device for a pavement machine, characterized in that: 2. The emulsion dispersing apparatus according to claim 1, wherein the spraying unit is disposed at a position rearward of a bumper provided at a front end of the body of the paving machine. 3. The sprayer according to claim 1, wherein the spray portion disposed forward of the front end of the bar conveyor is a front spray portion, and the rear spray portion is further positioned at a front position of a screw conveyor disposed below the rear end of the bar conveyor. An emulsion dispersing device for a pavement machine, wherein the parts are arranged. 4. The emulsion dispersing apparatus according to claim 3, wherein the emulsion dispersing range of the rear spraying portion is set so as not to overlap with the emulsion dispersing range of the front spraying portion. 5. The emulsion dispersing apparatus according to claim 1, wherein the spraying unit includes a dispersing width adjusting means for adjusting an emulsion dispersing width in a lateral direction of the machine. 6. The spray unit according to claim 1, 2, 3, 4, or 5, wherein the spraying width in the lateral direction of the machine is substantially equal to the width of the mixed material transport of the bar conveyor. An emulsion spraying apparatus for a pavement machine, wherein the apparatus is set equal or wide. 7. The pavement machine running unit according to claim 1, wherein the spray unit disposed forward of the front end of the bar conveyor has an emulsion spraying width in the machine body left and right direction. An emulsion dispersing apparatus for a pavement machine, wherein the apparatus is set within the width of a locus.