JP2014012937A - Asphalt paving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an asphalt paving machine including a smog reducing device capable of reducing situations in which smog having the risk of adversely affecting the body of an operator performing operations on a paving machine body flows to the operator's side.SOLUTION: A smog reducing device 22 includes: a smoke exhaust duct 25 which has an inlet port 23 provided on a rear surface 13a of a paving machine body 13 and which has an exhaust port 24 provided in a position away from an operator station 18; a fan 29 which generates a forced airflow in the smoke exhaust duct 25; a hood 26 which is positioned on the upside of the inlet port 23 and provided protrusively toward the side of a front surface of a screed 15 from the rear surface 13a of the paving machine body 13; and a cover 27 with flexibility, which is arranged in the state of being extended to the top of the hood 26 from the front surface of the screed 15 and arranged in the state of closing a gap between the hood 26 and the screed 15.

Description

  The present invention relates to an asphalt pavement machine, and more particularly, to an asphalt pavement machine provided with a fume reduction device capable of reducing the influence of harmful fumes (fumes) emanating from an asphalt mixture on a machine operator.

  Conventionally, an asphalt paving machine such as an asphalt finisher has been used to lay an asphalt mixture on a construction base to form a hard road surface.

  In general, this type of asphalt paving machine includes a paver main body having an operator station on the upper rear side, a composite hopper disposed on the front side of the paver main body and containing the composite, and the main body of the paver. A feeder that is provided inside and conveys the asphalt composite in the composite hopper to the rear side of the paver main body, and the asphalt mixture sent by the feeder is installed on the rear side of the paver main body. A screw spreader that spreads on a surface (paved surface), and a screed that averages the asphalt mixture spread by the screw spreader to a predetermined thickness on the rear side of the screw spreader. The asphalt mixture stacked on the conveyor is transported to the screw spreader by the feeder, and uniformly spread with a predetermined pave width on the construction base surface by the screw spreader. After arranging the adapted leveled spread to a predetermined thickness at the screed.

  The disadvantage of the asphalt pavement machine that uses such asphalt mixture is that when the asphalt mixture is heated, the petroleum distillation product contained in the asphalt mixture generates fumes with bad odor and the like. is there. The fumes also contain nitrogen, sulfur, benzene, and other hydrocarbon materials, many of which are in close proximity to the asphalt paving machine operator's body if they spend a long time in close proximity to the asphalt paving machine. There is a risk of harm. Further, most of the smoke directed to the operator is from the upper gap of the screw spreader provided between the rear surface of the paver main body and the front surface of the screed.

  Therefore, conventionally, a large hood is attached above the screw spreader so as to close substantially the entire gap between the rear surface of the paver main body and the front surface of the screed, and a smoke exhaust device having a suction port is provided inside the hood, The fumes emitted in the gap area between the rear surface of the main body of the paving machine and the front surface of the screed are captured by a hood, and the captured fumes are dissipated to the atmosphere at a position away from the operator through a smoke exhaust device, and the smoke to the operator An asphalt pavement machine in which the influence is reduced has also been proposed (see, for example, Patent Document 1).

JP-T-2001-526751 gazette.

  However, as in the technique described in Patent Document 1, even in an asphalt pavement machine in which a hood is attached above the screw spreader so as to close the gap between the rear surface of the paver main body and the front surface of the screed, the gap between the hood and the screed is In many cases, fumes leaked from the gap to the operator station.

  In order to provide an asphalt pavement machine equipped with a smoke reduction device that can reduce the flow of smoke that may adversely affect the operator's body working on the main body of the pavement machine to the operator side. The technical problem which should arise arises, and this invention aims at solving this problem.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is directed to a paving machine main body having an operator station on the upper rear side and a screed disposed behind the main body of the paving machine. In an asphalt pavement machine provided with a smoke reduction device that reduces the smoke traveling toward the operator station, the smoke reduction device is provided with a suction port on the rear surface of the pavement machine body and a discharge port at a position away from the operator station. A smoke exhaust duct, a fan for generating a forced air flow that sucks and discharges smoke from the suction port into the smoke exhaust duct, and the paving machine at a position above the suction port. A hood that protrudes from the rear surface of the main body toward the front side of the screed; Providing a cover having flexibility which is extended disposed to the over-de is disposed closes the gap between the hood and the screed asphalt paving machine comprising comprises a.

  According to this configuration, the flexible cover that is disposed so as to almost completely cover the gap between the hood and the screed can block the fumes that leak from between the hood and the screed toward the operator station. . In addition, on the lower side of this flexible cover, smoke rising from the pavement surface (construction base surface) toward this cover is sucked into the smoke exhaust duct on the forced air flow generated by the fan, and the operator And dissipate into the atmosphere at a distance. In addition, the flexible cover can always keep the state where the screed is bent following the movement of the screed when the screed moves in the vertical direction and the gap between the hood and the screed is covered.

  According to a second aspect of the present invention, there is provided an asphalt pavement machine according to the first aspect, wherein the cover having flexibility is formed of rubber or a resin member.

  According to this configuration, the flexible cover can be made easily and inexpensively by molding rubber or a resin member.

  According to a third aspect of the present invention, there is provided an asphalt pavement machine according to the first or second aspect, wherein the cover having flexibility is formed in an elastic bellows shape.

  According to this configuration, by forming the flexible cover in an elastic bellows shape, the cover can be more easily bent with respect to the movement of the screed, and the followability of the cover is further enhanced.

  According to a fourth aspect of the present invention, in the configuration according to the first, second, or third aspect, in the smoke exhaust duct, suspended particulate matter contained in the smoke passing through the smoke exhaust duct, etc. An asphalt pavement machine provided with dust collecting means for collecting and removing soot and dust is provided.

  According to this configuration, when the smoke sucked into the smoke exhaust duct of the smoke reduction device passes through the smoke exhaust duct, harmful dust such as suspended particulate matter contained in the smoke is collected by the dust collecting means. Since it is removed and then dissipated into the atmosphere through the outlet, air pollution can be prevented.

  According to the first aspect of the present invention, the fumes leaking from the gap between the hood and the screed to the operation station side are blocked by a flexible cover, and the forced air flow generated by the fan is provided below the cover. Since the air can be sucked into the smoke exhaust duct and dissipated into the atmosphere at a position away from the operator, the influence of the smoke on the operator can be reduced and the working environment can be improved. Moreover, the flexible cover keeps covering the gap between the hood and the screed by flexing following the screed movement when the screed moves up and down with respect to the cover. Since the influence of the smoke on the operator can be eliminated, the working environment can be improved.

  In the invention described in claim 2, since the cover having flexibility can be made easily and inexpensively by molding a rubber or resin member, the economy is improved.

  In the invention according to claim 3, since the flexible cover is formed in a stretchable bellows shape, it can bend and follow the movement of the screed without difficulty. Improvement can be achieved.

  In the invention according to claim 4, since harmful dust such as suspended particulate matter contained in the smoke is collected and removed by the dust collecting means and then dissipated into the atmosphere through the discharge port, air pollution can be prevented. Furthermore, the work environment can be improved.

1 is a side view of an asphalt pavement machine according to an embodiment of the present invention that is partially cut away. The rear surface schematic block diagram which removed the cover which has flexibility, and was seen from the front side of the screed. The figure explaining the effect | action of the cover which has a softness | flexibility in an asphalt pavement machine same as the above.

  In order to achieve the object of the present invention, there is provided an asphalt pavement machine capable of reducing the flow of fumes that may adversely affect the operator's body working on the paver main body to the operator side. In the asphalt pavement machine, comprising the pavement machine main body having the operator station on the upper rear side and the smoke reduction device for reducing the smoke directed to the operator station from between the screed disposed behind the main body of the pavement machine, the smoke reduction The apparatus has a suction port on the rear surface of the paver main body and a discharge duct provided with a discharge port at a position away from the operator station, and sucks smoke from the suction port into the smoke discharge duct, and A fan that generates a forced air flow exhausted from the exhaust port, and a position above the suction port, A hood that protrudes from the rear surface of the main body of the paving machine toward the front side of the screed, and a hood that extends from the front surface of the screed to the hood and closes the gap between the hood and the screed. This is realized by having a configuration including a flexible cover.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the accompanying drawings.

  1 and 2 show an asphalt finisher as an asphalt paving machine according to the present invention, FIG. 1 is a partially cutaway side view of the asphalt finisher, and FIG. 2 is a main body of a paving machine viewed from the front side of a screed. FIG. In the following description, the left and right direction left side (arrow D) in FIG. 1 will be described as the front of the asphalt pavement machine, the right side will be the rear, the up and down direction will be up and down, and the direction perpendicular to the page will be left and right.

  1 and 2, the asphalt finisher 11 includes a traveling vehicle body 13 (hereinafter referred to as “pavement machine body”) having a composite hopper 12 in which an asphalt composite material, which is a paving material, is stacked and accommodated. A pair of screeds 15 on the left and right that are pulled by the left and right leveling arms 14 and level the asphalt mixture to finish the construction base surface (paved surface) smoothly. Consists of Note that an arrow D in FIG. 1 indicates the traveling direction of the asphalt finisher 11.

  Further, the paver main body 13 is provided with a feeder (not shown) for conveying the asphalt mixture in the mix hopper 12 to the rear side of the paver main body 13 over almost the entire length of the paver main body 13. It has been. Further, the paver main body 13 includes a pair of left and right extendable screw spreaders that are positioned between the rear surface 13a of the paver main body 13 and the front surface of the screed 15 and spread the asphalt mixture on the construction base surface. 16,16 are provided.

On the other hand, an operator station 18 is provided at the upper rear side of the paving machine body 13 to which driver seats 17 and 17 for an operator who operates the asphalt finisher 11 are attached. Further, an exhaust gas chimney 19 for exhausting exhaust gas from an engine (not shown) mounted inside the paver main body 13 is provided on the upper front side of the operator station in a state of protruding greatly upward. It has been.

  In the asphalt finisher 11, the asphalt mixture stacked on the hopper 12 is sent to the rear of the paver main body 13 by the feeder until it falls onto the screw spreaders 16 and 16. The screw spreaders 16 and 16 rotate the screw blades by the rotation of the screw shaft, and uniformly spread the asphalt mixture fed by the feeder over the entire front width of the rear screed 15. The screed 15 spreads the asphalt mixture spread on the pavement surface by the screw spreaders 16 and 16, and finishes the construction base surface smoothly.

  The above is the basic configuration and operation of the conventionally known asphalt finisher 11. Next, the most characteristic structure of the present invention will be described. In the asphalt finisher 11 of the present invention, the smoke reduction device 22 is provided between the paver main body 13 and the screed 15 as shown in FIG. is there. In the haze reducing device 22, the asphalt composite fumes 20 (schematically indicated by arrows in FIG. 1) that diverge between the paver main body 13 and the screed 15 are directed to the operator station 18. Decrease.

  More specifically, the smoke reduction device 22 includes a smoke exhaust duct 25 having a suction port 23 on the rear surface 13a of the paver main body 13 and a discharge port 24 away from the operator station 18, and a paver. Between the rear surface 13a of the main body 13 and the front surface of the screed 15, a hood 26 that shields the fumes 20 from the construction base surface toward the operator station 18 and a flexible cover 27 are formed. As shown in FIG. 2, the two suction ports 23 of the smoke exhaust duct 25 are provided side by side in the left-right direction. However, the number of the suction ports 23 may be one or more, and the shape of the mouth may be any shape. .

  As shown in FIG. 2, the hood 26 is provided over substantially the entire left and right width of the paver main body 13. As shown in FIGS. 1 and 3, the hood 26 is fixedly attached to the rear surface 13a of the paver main body 13 at one end side (front side) above the suction port 23, and the other end side (rear side). 26b side) protrudes from the rear surface 13a of the paving machine main body 13 toward the front surface side of the screed 15, and the longitudinal section is formed in a substantially trapezoidal shape. More specifically, the hood 26 is formed of a steel plate as a hollow body having a front surface and a lower surface opened, and an upper surface 26a, a rear surface 26b, and left and right side surfaces 26c, 26c closed.

  The flexible cover 27 (hereinafter simply referred to as “cover 27”) is provided over substantially the entire width of the hood 26 as shown in FIG. The cover 27 is formed by molding rubber or a soft resin material, and is formed as a hollow body having front and lower surfaces opened, and an upper surface 27a, a rear surface 27b, and left and right side surfaces 27c and 27c are closed. The entire body is flexible so that it can flex freely in the vertical and horizontal directions.

As shown in FIG. 3, the cover 27 covers the hood 26 and the screed so as to cover a part of the upper surface 26a, the rear surface 26b, the left and right side surfaces 26c, 26c of the hood 26 from the upper side of the hood 26. 15, the front surface 27 a is attached to the upper surface 26 a side of the hood 26 and the rear surface 27 b is attached to the front surface side of the screed 15, and the gap between the paver main body 13 and the screed 15 is connected to the hood 26 and the cover 27. It is held in a closed state. Therefore, under the hood 26 and the cover 27, the smoke 20 that diverges and rises from the construction base surface is completely blocked by the hood 26 and the cover 27.

  On the other hand, a smoke discharge chimney 28 is attached to the other end of the smoke exhaust duct 25 where the discharge port 24 is provided. This smoke discharge chimney 28 protrudes greatly upward from the front upper part of the paver main body 13 so that the operator who operates the asphalt finisher 11 at the driver's seat 17 of the operator station 18 is not easily affected by the smoke 20. ing. Therefore, the discharge port 24 of the smoke exhaust duct 25 is substantially an upper opening of the smoke discharge chimney 28.

  In addition, as shown in FIG. 1, in the middle of the smoke exhaust duct 25, an electric motor for forming a forced air flow that sucks the smoke 20 from the suction inlet 23 and exhausts it from the exhaust outlet 24 in the smoke exhaust duct 25. Dust collecting means for collecting and removing the dust of suspended particulate matters such as nitrogen, sulfur, benzene and other hydrocarbon substances contained in the smoke 29 passing through the exhaust duct 25 and the fan 29 of the hydraulic motor. 30 is disposed.

  Therefore, in the asphalt finisher 11 provided with the smoke reduction device 22 formed in this way, the smoke 20 that diverges and rises from the construction base surface at the lower portion of the hood 26 and the cover 27 is shown in FIG. As shown in FIG. 1 and FIG. The blocked smoke 20 is put on the forced air flow generated by driving the fan 29 and taken into the exhaust duct 25 from the suction port 23, and further passes through the smoke exhaust duct 25 and the smoke discharge chimney 28. It is carried away from the operator and dissipated into the atmosphere. Thereby, the influence of the smoke 20 with respect to an operator can be reduced and the working environment can be improved.

  Further, since the cover 27 is formed with flexibility, when the screed 15 moves in the vertical or horizontal direction with respect to the cover 27, or the pavement machine main body 13 side is vertical or horizontal with respect to the cover 27. When moving in the direction, etc., it bends following the movement of the screed 15 or the paving machine main body 13 side, always keeps the state covering the gap between the hood 26 and the screed 15, and the effect of the smoke on the operator is kept. It can always be lost.

The cover 27 may be formed not only in the form of a sheet-like surface in a hollow body but also in a telescopic bellows shape. Therefore, the followability of the cover 27 is further enhanced.

  The present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

  The present invention can be applied to all asphalt finishers using asphalt composites.

11 Asphalt finisher (asphalt paving machine)
12 Compound hopper 13 Car body (Pavement machine main body)
13a rear surface 14 leveling arm 15 screed 16 screw spreader 17 driver's seat 18 operator station 19 exhaust gas chimney 20 smoke 22 smoke reduction device 23 suction port 24 discharge port 25 smoke exhaust duct 26 hood 26a upper surface 26b rear surface 26c left and right side surfaces 27 cover 27a front surface 27b Rear side 27c Side 28 Smoke discharge chimney 29 Fan 30 Dust collecting means

Claims (4)

In an asphalt pavement machine comprising a paver body having an operator station on the upper rear side and a fume reducing device for reducing the fume toward the operator station from between a screed disposed behind the paver body,
The smoke reduction device has a suction port provided on the rear surface of the paver main body and a discharge port provided at a position away from the operator station, and sucks smoke into the smoke discharge duct from the suction port. And a fan that generates a forced air flow discharged from the discharge port, and a hood that protrudes from the rear surface of the paver main body toward the front side of the screed at a position above the suction port, and An asphalt pavement machine comprising: a flexible cover that is arranged to extend from the front surface of the screed to above the hood so as to close a gap between the hood and the screed.   2. The asphalt pavement machine according to claim 1, wherein the cover having flexibility is formed of rubber or a resin member.   The asphalt pavement machine according to claim 1 or 2, wherein the cover having flexibility is formed in a stretchable bellows shape.   2. A dust collecting means for collecting and removing soot and dust such as suspended particulate matter contained in the smoke passing through the smoke exhaust duct is disposed in the smoke exhaust duct. Asphalt paving machine according to 2 or 3.