JP2014139388A - Asphalt paving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an asphalt paving machine equipped with a fume reducer capable of reducing fumes flowing toward the operator side without disturbing confirmation work around a screw spreader by an operator sitting on a paving machine body.SOLUTION: An asphalt paving machine is equipped with a fume reducer 22 which reduces fumes flowing toward an operator station. The fume reducer 22 includes: a fume exhaust duct which is provided with a suction port 24 at the rear surface of a paving machine body 13 and provided with an exhaust port at a position away from the operator station; a fan which generates a forced air flow forcibly sucking fumes from the suction port 24 into the fume exhaust duct and forcibly discharging the fumes from the exhaust port; and a hood 27 which is formed with a fume catching opening 27c in the undersurface, covers above the suction port 24, and is provided at the rear surface of the paving machine body 13 so as to project toward the front side of a screed 15. The hood 27 is formed with a slit 28, communicating with the inside of the hood 27, in a roof.

Description

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

  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 pavement machine includes a pavement machine body having an operator station with a driver's seat on the upper rear side, a composite hopper that accommodates a composite material disposed on the front side of the pavement machine body, A feeder provided in the main body of the paving machine for conveying the asphalt composite material in the composite hopper to the rear side of the main body of the paving machine, and an asphalt composite material sent by the feeder on the rear side of the main body of the paving machine A screw spreader that spreads on the construction base surface (paved surface), and a screed that averages the asphalt mixture spread by the screw spreader to a predetermined thickness, and the asphalt mixture in the composite hopper Is transported onto the screw spreader by the feeder, and the asphalt mixture is uniformly laid on the construction base surface with a predetermined pavement width by the screw spreader. After, so that the leveled laid in a predetermined thickness by the screed.

  The disadvantage of the asphalt pavement machine using such asphalt mixture is that when the asphalt mixture is heated, the petroleum distillation product contained in the asphalt mixture generates fumes having bad odor and the like. . The fumes also contain nitrogen, sulfur, benzene, and other hydrocarbon materials. Many of these materials can be detrimental to the body of an operator operating an asphalt paving machine that spends a long time in close proximity to the asphalt paving machine. Also, most of the fumes toward the operator come 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 so as to cover the entire gap between the rear surface of the paver main body and the front surface of the screed, that is, to cover the entire upper side of the screw spreader, and inside the hood. A smoke evacuation device with a suction port is installed, the fumes emitted in the gap area between the rear surface of the paver main body and the front surface of the screed are captured by the hood, and the captured smoke is separated from the operator by the smoke evacuation device. An asphalt pavement machine has also been proposed that is dissipated into the atmosphere and dissipated into the atmosphere so as to reduce the effects of fumes on the operator (see, for example, Patent Document 1).

JP-T-2001-526751 gazette.

  However, in the asphalt pavement machine in which a large hood is attached so as to cover the entire upper side of the screw spreader between the rear surface of the paver main body and the front surface of the screed as in the technique described in Patent Document 1, When the operator operating on the operator station tried to visually check the spread of asphalt mixture with the screw spreader, there was a problem that the large hood obstructed the visual inspection. .

  Therefore, a technology to be solved to provide an asphalt pavement machine equipped with a smoke reduction device capable of reducing the smoke flowing to the operator side without disturbing the confirmation work around the screw spreader by the operator sitting on the main body of the paver. The present invention aims to solve 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 fume reduction device that captures fumes passing between them and reduces the fume directed to the operator station, the fume reduction device is provided with a suction port on the rear surface of the pavement machine body and is separated from the operator station. A smoke exhaust duct provided with a discharge port at a position, a fan that forcibly sucks the smoke into the smoke exhaust duct from the suction port, and generates a forced air flow forcibly exhausting from the discharge port; A smoke trap opening is provided on the lower surface to cover the upper side of the suction port, and the rear surface of the paving machine body projects to the front side of the screed. It includes a vignetting hood, and the hood provides an asphalt paving machine comprising a slit leading to the hood interior roof.

  According to this configuration, when the fan is driven and a forced air flow is generated, air in the hood is sequentially sucked into the smoke exhaust duct from the suction port, and the inside of the hood becomes negative pressure. Therefore, when it passes between the rear surface of the main body of the paving machine to which the hood is attached and the screed and flows to the operator station side, when the smoke passes through the space between the hood and the screed, Inhaled from the smoke trap opening. In addition, a part of the unsucked smoke that is directed toward the roof side of the hood without being sucked in at the portion for opening the smoke trap is directed toward the slit side along the roof, and is sucked into the hood through the slit. The smoke sucked into these hoods further enters the smoke exhaust duct through the forced air flow, and is released into the atmosphere from a discharge port provided at a position away from the operator station.

  As a result, the amount of fumes that flow directly to the operator station side through the gap between the rear surface of the main body of the paving machine and the screed is drastically reduced, and the adverse effects of the fumes on the operator can be reduced. In this way, by providing a slit in the roof of the hood, it is possible to increase the collection rate of the smoke so that the operator can visually recognize the whole with a small hood instead of a large hood as used conventionally. It is possible to cope with a hood that is elongated in the width direction.

  According to a second aspect of the present invention, in the configuration of the first aspect, the hood is adjacent to a spreader arm provided with a part of the motor projecting on both the left and right sides, and includes the projecting part of the motor. A first hood provided to extend substantially horizontally from the upper rear surface of the paving machine main body toward the screed side, and the first hood at a position opposite to the spreader arm. A second hood having a substantially triangular cross-section provided side by side and protruding obliquely downward from the upper rear surface of the main body of the paving machine toward the screed side, and the slit is a horizontal roof of the first hood There is provided an asphalt pavement machine formed by a step between a surface and a roof protruding obliquely downward of the second hood.

  According to this configuration, the first hood extends substantially horizontally from the upper rear surface of the paver main body toward the screed side, and is provided above the motor attached to the spreader arm. Therefore, when the spreader arm is moved upward, a part of the motor protruding from the left and right sides of the spreader arm can take a large distance until it hits the first hood, and the spreader arm is easy to operate. Become.

  Further, the invention according to claim 3 is the configuration according to claim 1 or 2, wherein the smoke exhaust duct contains dust such as suspended particulate matter contained in the smoke passing through the smoke exhaust duct. An asphalt pavement machine provided with dust collecting means for collecting and removing 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, since the screed provided so as to protrude from the rear surface of the paver main body to the screed side can be reduced in size, it is possible to reduce the hood from obstructing the operator's field of view. Therefore, the operator can instantly determine the spread condition of the asphalt mixture by the screw spreader and the surrounding situation between the rear surface of the paving machine main body and the front surface of the screed, thereby improving workability. Can be expected.

  According to the second aspect of the present invention, since the distance until a part of the motor protruding from the left and right sides of the spreader arm collides with the hood can be increased, the spreader arm can be moved greatly. In addition to the effect, the effect of increasing the degree of freedom in the design of the spreader arm can be expected.

  Since the invention according to claim 3 collects and removes harmful dust such as suspended particulate matter contained in the fumes by the dust collecting means, it is dissipated into the atmosphere through the discharge port. In addition to the effects, air pollution can be prevented and the working environment can be further improved.

The side view of the asphalt pavement machine which concerns on embodiment of this invention. The rear side schematic block diagram of the paver main body seen from the front side of the screed. The perspective view which shows the hood of an asphalt pavement machine same as the above. FIG. 4 is a cross-sectional view taken along line AA in FIG.

  The present invention provides an asphalt paving machine capable of reducing fumes that affect the operator without interfering with the operation of the operator working on the main body of the paving machine to confirm the state around the screw spreader. In order to achieve the object, the smoke that captures the smoke passing between the paving machine main body having the operator station at the rear upper part and the screed disposed at the rear of the paving machine main body, and reduces the fumes toward the operator station. In the asphalt pavement machine provided with a reduction device, the smoke reduction device is provided with a smoke exhaust duct provided with a suction port at a rear surface of the paver main body and a discharge port at a position away from the operator station, and from the suction port. The smoke is forcibly sucked into the exhaust duct and forcibly discharged from the discharge port. A fan that generates a forced air flow, and a hood that is provided with a smoke trapping opening on the lower surface to cover the upper side of the suction port, and is provided on the rear surface of the paving machine body so as to protrude from the front side of the screed. The hood is realized by providing a slit in the roof that leads to the inside of the hood.

  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 an external side view thereof, and FIG. 2 is a rear side view of the main body of the paving machine viewed from the front side of the screed. In the following description, the left and right direction left side (arrow D) in FIG. 1 is described as the front of the asphalt pavement machine, the right side is the rear, the up and down direction is up and down, and the direction perpendicular to the page is the left and right.

  In the figure, the asphalt finisher 11 is a traveling vehicle body 13 (hereinafter referred to as a “paving machine main body 13”) as a main body of a paving machine in which a composite hopper 12 for containing an asphalt composite material which is a paving material is disposed on the front side. And a pair of screeds 15 on the left and right, which are pulled by the left and right leveling arms 14 on the paver main body 13 and level the asphalt mixture to finish the construction base surface (paved surface) smoothly. 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 pavement machine main body 13 is located between the rear surface 13a of the pavement machine main body 13 and the front surface of the screed 15 (see FIG. 1), and a pair of left and right that spread the asphalt mixture on the construction base surface. Screw spreaders 16 and 16 (see FIG. 2) are provided.

  The screw spreaders 16 and 16 are attached so as to be movable in the vertical direction via a spreader arm 17 that is rotatable in the vertical direction. As shown in FIG. 2, a motor 18 as a drive source of the screw spreader 16 is placed on the upper part of the spreader arm 17 so that a part of the motor 18 protrudes to the left and right sides of the spreader arm 17. It is attached.

  Further, an operator station 20 is provided at the upper rear side of the paver main body 13 to which driver seats 19 and 19 on which an operator who operates the asphalt finisher 11 is seated are attached. Further, an exhaust gas chimney 21 for exhausting exhaust gas of an engine (not shown) mounted in the interior of the paver main body 13 protrudes greatly upward from the front upper portion of the operator station 20. It is provided in the state.

  In the asphalt finisher 11, the heated asphalt mixture is carried by a dump truck and loaded onto the hopper 12. Further, the asphalt composite material loaded in 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, 16 rotate the screw blade 16 a by the rotation of the screw shaft driven by the motor 18, and the asphalt mixture fed by the feeder covers the entire front width (lateral width) of the rear screed 15. And spread evenly. On the other hand, 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 asphalt finisher 11 of the present invention will be described. The most characteristic structure of the asphalt finisher 11 according to the present invention is that, as shown in FIG. 1, a smoke reduction device 22 is provided in a gap between the paver main body 13 and the screed 15. In the smoke reduction device 22, asphalt composite fumes 23 (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 20. Decrease.

  More specifically, the smoke reduction device 22 includes a smoke exhaust duct 26 in which a suction port 24 is provided on the rear surface 13a of the paver main body 13 and a discharge port 25 is provided at a position away from the operator station 20, and a paver. Between the rear surface 13a of the main body 13 and the front surface of the screed 15, a hood 27 for capturing the fumes 23 from the construction base surface toward the operator station 18 is formed. In addition, as shown in FIG. 2, the suction port 24 of the smoke exhaust duct 25 is provided two in total, one on each side of the spreader arm 17. The mouth shape is circular, but may be any shape such as a square.

  As shown in FIG. 2, two hoods 27 are provided, one on the left and right in a symmetrical relationship across the spreader arm 17, and are provided over the entire width of the pavement device body 13. It has been.

  Each of the hoods 27, 27 is composed of a first hood 27A and a second hood 27B as shown in FIGS. Among them, the first hood 27A is located adjacent to the spreader arm 17 in which a part of the motor 18 that rotationally drives the screw spreader 16 is provided to protrude on both the left and right sides and includes the protruding part of the motor 18, That is, the roof is provided at an upper position covering the protruding portion so as to extend substantially horizontally from the upper part of the rear surface 13a of the paver main body 13 toward the screed 15 as shown in FIGS. The other second hood 27B is provided at a position opposite to the spreader arm 17 and at a position adjacent to the first hood 27A, and the roof extends from the upper part of the rear surface 13a of the paving machine body 13 toward the screed 15 side. It protrudes diagonally downward and is formed in a cross-sectional schematic triangle as a whole.

  The lower surfaces of the hoods 27A and 27B are respectively opened as the smoke capturing openings 27c. Further, the rear surfaces of the hoods 27A and 27B are also opened. The hoods 27A and 27B are disposed in contact with the rear surface 13a of the paving machine main body 13, so that the rear surfaces thereof are formed by the rear surface 13a of the paving machine main body 13. Closed. In addition, the boundary of each hood 27A, 27B, that is, the adjacent portion is formed such that the roof of the first hood 27A is inclined in the horizontal direction and the roof of the second hood 27B is inclined obliquely downward. Thus, as shown in FIGS. 2 and 3, a slit 28 having a V-shape in a side view is formed at a boundary portion between the first hood 27A and the second hood 27B. As shown in FIG. 2, the suction port 24 of the smoke exhaust duct 26 is provided in the vicinity of the boundary between the first hood 27A and the second hood 27B, and each hood 27A, 27B Its upper part is covered.

  On the other hand, a smoke discharge chimney 29 is attached to the discharge port 25 on the other end side of the smoke exhaust duct 26, and the smoke discharge chimney 29 protrudes greatly upward from the upper front side of the pavement machine main body 13, and the operator station. An operator who sits in the 20 driver's seats 19 and operates the asphalt finisher 11 is not easily affected by the smoke 23. Therefore, the discharge port 25 of the smoke exhaust duct 26 is substantially an upper opening of the smoke discharge chimney 29.

In addition, as shown in FIG. 1, in the middle of the smoke exhaust duct 26, an electric motor or the like for forming a forced air flow into the smoke exhaust duct 26 that sucks the smoke 23 from the suction inlet 24 and exhausts it from the exhaust outlet 25. Dust collection that collects and removes particulate particulate matter such as nitrogen, sulfur, benzene, and other hydrocarbon substances contained in the smoke 30 passing through the fan 30 of the hydraulic motor and the smoke exhaust duct 26 Means 31 are provided.

  Next, the operation of the haze reducing device 22 configured as described above will be described. First, when the asphalt finisher 11 is driven and the asphalt mixture is fed from the hopper 12 to the screw spreaders 16 and 16 between the paver main body 13 and the screed 15 by the feeder, the asphalt mixture is covered by the screw spreaders 16 and 16. Can be spread on the pavement surface. Since this asphalt mixture is heated, fumes having a bad odor are generated between the pavement machine main body 13 and the screed 15 by the petroleum distillation product contained in the asphalt mixture.

  In addition, when the fan 30 of the smoke reduction device 22 is driven, air is drawn from the suction port 24, and a forced air flow that is discharged from the smoke stack 29 through the discharge port 25 is generated. become. Therefore, when the smoke that passes between the rear surface 13a of the paver main body 13 to which the hood 27 is attached and the screed 15 and flows to the operator station 20 side passes between the hood 27 and the screed 15, the negative pressure In the hood 27 in the state, most of it is sucked and captured from the smoke capturing openings 27c and 27c on the lower surface. Here, the smoke 23 sucked into the hood 27 is indicated by a solid line in FIG.

  On the other hand, the unoccupied smoke 23 indicated by a dotted line in FIG. 4 is directed to the roof side of the first hood 27A and the second hood 27B without being sucked in the portions of the smoke capturing openings 27c and 27c. It goes to the slit 28 side along the roof, and is sucked into the hood 27 through the slit 28 and captured. This is sucked into the smoke exhaust duct 26 from the suction port 24 and provided at a position away from the operator station 20. From the smoke discharge chimney 29.

  As a result, the amount of smoke passing between the rear surface 13a of the paver main body 13 and the screed 15 and flowing directly to the operator station 20 side is drastically reduced, and adverse effects of the smoke on the operator can be reduced. Thus, by providing the slit 28 between the roof of the hood, that is, between the first hood 27A and the second hood 27B, it is possible to increase the recovery rate of the smoke.

  Moreover, it is necessary to provide a large hood that covers the entire gap between the rear surface 13a of the paving machine body 13 and the screed 15 as provided by the conventional asphalt finisher due to the increase in the collection rate of the smoke. Therefore, the shape of the hood can be reduced, and in particular, it can be handled by a hood that is elongated in the width direction so that the operator can visually recognize the whole. As a result, a large gap can be secured between the hood 27 and the screed 15, and the operator can immediately determine the spread state of the asphalt mixture by the clew spreader 16 and the surrounding situation. Can contribute to the improvement of workability.

  Further, since the first hood 27A extends substantially horizontally from the upper part of the rear surface 13a of the paver main body 13 toward the screed 15 and is provided above the motor 18 attached to the spreader arm 17, the spreader arm 17 is provided. When the motor is moved upward, the distance until a part of the motor 18 protruding from the left and right sides of the spreader arm 17 collides with the first hood 27A can be increased, and the spreader arm 17 can be easily operated. .

  Further, a dust collecting means 39 is provided in the smoke exhaust duct 25 to collect and remove harmful dust such as suspended particulate matter contained in the smoke 20 passing through the smoke exhaust duct 25, and then to the atmosphere through the exhaust outlet 24. Because it dissipates inside, it can prevent air pollution and improve the working environment.

  It should be noted that 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 12 Hopper 13 Car body (pavement machine main body)
13a Rear surface of paver main body 14 Leveling arm 15 Screed 16 Screw spreader 16a Screw blade 17 Spreader arm 18 Motor 19 Driver's seat 20 Operator station 21 Exhaust chimney 22 Smoke reducing device 23 Smoke 24 Suction port 25 Exhaust port 26 Smoke duct 27 Hood 27A First hood 27B Second hood 27c Smoke capturing opening 28 Slit 29 Smoke discharge chimney 30 Fan 31 Dust collecting means

Claims (3)

An asphalt pavement machine comprising a paver main body having an operator station on the upper rear side and a smoke reducing device that captures the smoke passing between the screed disposed behind the main body of the paver and reduces the smoke toward the operator station. In
The smoke reduction device is
A smoke exhaust duct having a suction port on the rear surface of the paver main body and a discharge port at a position away from the operator station;
A fan that forcibly sucks the fumes from the suction port into the flue gas duct and generates a forced air flow forcibly exhausting from the discharge port;
A hood provided on the lower surface to cover the upper side of the suction port by providing an opening for capturing smoke and projecting to the front side of the screed on the rear surface of the main body of the paving machine,
An asphalt pavement machine, wherein the hood is provided with a slit in the roof leading to the inside of the hood.   The hood is adjacent to a spreader arm provided with a part of the motor projecting on both the left and right sides, and in an upper position including the projecting part of the motor from the upper rear surface of the paving machine body toward the screed side. A first hood provided so as to extend substantially horizontally, and obliquely downward from the upper rear surface of the main body of the paving machine adjacent to the first hood at a position opposite to the spreader arm toward the screed side. And the second hood having a substantially triangular cross section provided so as to project from the horizontal hood surface of the first hood and a roof surface projecting obliquely below the second hood. Asphalt paving machine characterized by being formed.   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 as described.

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