JP2014012938A - Asphalt paving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an asphalt paving machine which enables an exhaust gas funnel and a funnel for smog discharge to be compactly installed with a good appearance in such a manner as to be hardly affected by a layout and which can prevent a burn from being caused by the exhaust gas funnel.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; and a funnel 28 for smog discharge, which is connected to the exhaust port 24 of the smoke exhaust duct 25 and arranged by surrounding the outside of an exhaust gas funnel 19 in such a manner as to configure a double pipe together with the exhaust gas funnel 19 of an engine.

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, the asphalt pavement machine in which the 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 is a fume trapped by the hood. In addition to the exhaust gas chimney for processing exhaust gas from the engine, another smoke discharge chimney is installed in order to dissipate the air in the atmosphere at a position away from the operator. For this reason, considering how to effectively arrange the smoke discharge chimney to dissipate it in the atmosphere with less influence on the operator and how to arrange it without impairing the appearance of the main body of the paving machine, etc. There was something that was difficult to layout.

  In addition, when only the exhaust gas chimney that processes the exhaust gas from the engine is seen, the exhaust gas chimney is connected immediately after the engine muffler and is heated by the hot exhaust gas from the engine. There is a risk of burns if touched. For this reason, a burn prevention guard has been provided, or has been installed at a location out of reach.

  Therefore, to provide an asphalt pavement machine that can install an exhaust gas chimney and a smoke discharge chimney in a compact and attractive manner while reducing the influence of the layout, and can prevent burns caused by the exhaust gas chimney. Therefore, a technical problem to be solved arises, and the present invention aims to solve this problem.

  The present invention has been proposed to achieve the above object, and the invention according to claim 1 provides an operator station at the upper rear side and exhausts engine exhaust gas into the atmosphere at the upper front side of the operator station. A pavement machine main body provided with an exhaust gas chimney, a screed disposed behind the pavement machine main body, and a smoke reduction device for reducing the smoke from the pavement machine main body and the screed toward the operator station. In the asphalt pavement machine, the smoke reduction device includes a smoke exhaust duct having a suction port provided at a rear surface of the paver main body and a discharge port at a position away from the operator station, and the suction duct in the smoke exhaust duct. A fan for generating a forced air flow for sucking fumes from the mouth and discharging from the outlet; An asphalt pavement machine comprising: a smoke discharge chimney that is connected to the exhaust outlet of the exhaust gas and is disposed around the outside of the exhaust gas chimney so as to form a double pipe with the exhaust gas chimney. .

  According to this configuration, the smoke discharge chimney can be configured as a single chimney in appearance by arranging it around the outside of the exhaust gas chimney so as to form a double pipe with the exhaust gas chimney. it can. In addition, the outer passage is the exhaust path of the engine, the outer passage is the exhaust path of the smoke, and the outer passage is the exhaust path of the low temperature fumes. No burns.

  According to a second aspect of the present invention, in the configuration according to the first aspect, in the smoke exhaust duct, dust such as suspended particulate matter contained in the smoke passing through the smoke exhaust duct is collected and removed. Provided is an asphalt pavement machine provided with dust collecting means.

  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 chimney for discharging smoke and the chimney for exhaust gas can be configured as a single chimney in appearance, so that the influence on the layout can be reduced, and the stack can be installed in a compact and attractive manner. In addition, it is possible to prevent the outer surface of the chimney from becoming hot because the inner passage is the exhaust path of the engine and the outer passage is the exhaust path of the haze, so there is no burn even when touched. , Improve safety.

  In the invention according to claim 2, 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. 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. Sectional drawing which shows schematic structure with the chimney for a fume discharge in the asphalt pavement machine same as the above, and the chimney for exhaust gas. AA sectional drawing of FIG. The figure explaining the mounting structure and effect | action of the cover which has a softness | flexibility in an asphalt pavement machine same as the above.

  The present invention provides an asphalt pavement machine that can install an exhaust gas chimney and a smoke discharge chimney in a compact and attractive manner while reducing the influence of the layout, and can prevent burns caused by the exhaust gas chimney. In order to achieve the purpose, a pavement machine main body provided with an operator station in the rear upper part and an exhaust gas chimney for discharging exhaust gas of the engine into the atmosphere at the front upper part of the operator station, and the pavement machine main body An asphalt pavement machine comprising a screed disposed behind the hose and a haze reducing device for reducing haze from the space between the paver body and the screed toward the operator station, wherein the haze reducing device is provided on the paver body. A position where a suction port is provided on the rear surface and away from the operator station A smoke exhaust duct provided with a discharge port, a fan that draws smoke from the suction port into the smoke discharge duct and generates a forced air flow discharged from the discharge port, and a discharge port of the smoke duct In addition, the present invention has been realized by including a smoke discharge chimney that surrounds the exhaust gas chimney so as to form a double pipe with the exhaust gas chimney.

  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. FIG. 2 shows a screed by removing a flexible cover. It is a rear surface schematic block diagram of the paver main body seen from the front side. 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 (combustion gas) 21 of an engine (not shown) mounted inside the paver main body 13 is provided at the upper front side of the operator station. As shown in FIG. 3, the exhaust gas chimney 19 is connected at one end (lower end) to the exhaust gas exhaust port of the muffler 31 in the exhaust device, and has the other end (upper end) greatly projecting upward. . The exhaust port side (upper end side) of the exhaust gas chimney 19 is bent so that the exhaust gas 21 is discharged toward the front of the paver main body 13 in a direction away from the operator station 18.

  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 reducing device 22 is provided with a suction port 23 on the rear surface 13a of the paver main body 13 and a smoke exhaust duct 25 provided with a smoke discharge port 24 away from the operator station 18. Between the rear surface 13a of the paver 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 5, the hood 26 is fixedly attached to the rear surface 13 a 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. 5, 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 duct 25 where the discharge port 24 is provided in a state where the smoke discharge duct 24 extends. This smoke discharge chimney 28 protrudes largely upward from the front upper part of the pavement machine main body 13 of the smoke exhaust duct 25 and guides the smoke 20 discharged from the discharge port 24 upward to dissipate it into the atmosphere. . Therefore, the discharge port 24 of the smoke exhaust duct 25 is substantially the discharge port 32 (see FIGS. 3 and 4) at the upper part of the chimney 28 for smoke discharge. By doing so, the operation of the operator station 18 is performed. The operator who is operating the asphalt finisher 11 at the seat 17 is not easily affected by the smoke 20.

  As shown in FIG. 3, the smoke discharge chimney 28 forms a double pipe with the exhaust gas chimney 19 so as to surround the outer peripheral side surface of the exhaust gas chimney 19, and the lower end side is a paving machine. It is fixed to the upper surface of the main body 13, and the upper end side is attached by fixing the center of an end surface portion 28a formed by a plurality (four in this example) of the discharge 32 to the exhaust gas chimney 19. . Therefore, in appearance, the exhaust gas chimney 19 and the smoke discharge chimney 28 form a single chimney, and the exhaust gas chimney 19 protrudes slightly from the upper end of the smoke discharge chimney 28.

  In addition, as shown in FIG. 1, in the middle of the smoke exhaust duct 25, electric or electric power for sucking the smoke 20 from the suction inlet 23 and discharging a forced air flow 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.

  The smoke discharge chimney 28 is provided to surround the outside of the exhaust gas chimney 19 so as to form a double pipe with the exhaust gas chimney 19, the inner passage is the exhaust gas passage of the engine, and the outer passage is the smoke passage. By using the exhaust path, the heat of the exhaust chimney 19 heated to a high temperature by the exhaust gas is blocked by the gap between the smoke discharge chimneys 28, and the outer surface of the chimney can be prevented from becoming hot. No burns.

  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 surface 27c Side surface 28 Smoke discharge chimney 28a End surface 29 Fan 30 Dust collecting means

Claims (2)

A pavement machine main body provided with an operator station on the upper rear side, and an exhaust gas chimney for discharging exhaust gas from the engine into the atmosphere at the upper front side of the operator station; and a screed disposed behind the main body of the pavement machine; In the asphalt pavement machine provided with a haze reducing device for reducing the haze from the space between the paver main body and the screed toward the operator station,
The smoke reduction device is configured to provide a suction port on a rear surface of the paver main body and provide a discharge port at a position away from the operator station, and suck smoke from the suction port into the smoke discharge duct. And a fan for generating a forced air flow to be discharged from the exhaust port, and an exhaust port of the smoke duct, and surrounding the outside of the exhaust gas chimney so as to form a double pipe with the exhaust gas chimney. An asphalt pavement machine, comprising:   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. Or asphalt pavement machine of 2 description.