JP5992841B2 - Asphalt paving machine - Google Patents

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.

  Generally, this type of asphalt pavement machine is a pavement machine main body having an operator station with a driver's seat on the upper rear side, and a composite hopper that accommodates an asphalt mixture disposed on the front side of the pavement machine main body, A feeder device that is provided in the main body of the paving machine and conveys the asphalt composite material in the composite material hopper to the rear side of the main body of the paving machine, and the asphalt composite material sent by the feeder device is the main body of the paving machine. A screw spreader that spreads on the construction base (paved surface) on the rear side, and a screed device that spreads and spreads the asphalt mixture spread by the screw spreader to a predetermined thickness, and the like in the composite hopper The asphalt mixture is conveyed onto the screw spreader by the feeder device, and the asphalt mixture is predetermined on the construction base surface by the screw spreader. After arranging uniformly laying paved width, so that the leveled spread to a predetermined thickness by the screed system.

  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. Most of the fumes to the operator come from the asphalt mix in the mix hopper and from the asphalt mix carried on the screw spreader between the back of the paver body and the front of the screed device. Is.

  Therefore, conventionally, a duct having a blower driven by a motor is provided, and suction ports of the duct are respectively provided on the rear surface and the front surface of the pavement machine main body, and the discharge port is connected to the chimney for discharging the fog, Smoke rising from the gap between the rear surface and the front of the screed device and the smoke rising from the composite hopper at the front of the paver main body are sucked into the duct from the suction port, and then into the atmosphere from the smoke discharge chimney connected to the discharge port. There has also been proposed a pavement paving machine provided with a haze reducing device which is discharged and dissipated to reduce the effect of haze on the operator (see, for example, Patent Document 1).

  However, the smoke reduction device described in Patent Literature 1 sucks the smoke in the composite hopper to the front side of the paver main body provided with the operator station in order to remove the smoke rising from the asphalt composite in the composite hopper. I'm trying to suck it into the duct. However, not all of the smoke sucked into the front side of the paver body is sucked into the duct, and depending on the wind direction, etc., it diffuses on the front side of the paver body and flows to the operator station, adversely affecting the operator. May be given.

  Therefore, on the contrary, wind is blown from the front of the main body of the pavement machine to the composite hopper side, and the smoke rising from the inside of the composite material hopper is blown off to the front of the main body of the pavement machine to dissipate, so that the effect of the smoke on the operator is reduced. There is also an asphalt pavement machine equipped with a smoke reduction device (no patent document). In this smoke reduction device, the direction of the wind blowing is fixed.

JP-T-2001-526751 gazette.

  However, with the conventional smoke reduction device that blows wind from the front of the paver main unit to the composite hopper side and blows off the smoke rising from the mix hopper to the front of the paver main unit, the wind blowing direction is fixed. The balloon direction cannot be adjusted. For this reason, there is a problem that a sufficient dissipating (decreasing) effect cannot be obtained depending on the direction of the wind in the natural world.

  Therefore, the direction of the wind blown toward the composite hopper side is adjusted according to the direction of the natural wind, so that the smoke rising from the hopper can be reduced from flowing to the operator station side. The technical problem which should be solved in order to provide an asphalt pavement machine provided with this 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 a pavement machine main body which is self-propelled by the driving force of the engine mounted thereon and which is provided with an operator station on the upper rear side. An asphalt comprising a composite hopper disposed so as to be integrally movable on the front side of the paver main body, and further comprising a fume reducing device for reducing the fog from the asphalt composite housed in the composite hopper toward the operator station. In the pavement machine, the smoke reduction device includes a fan, a blower duct that blows wind generated by the fan from the paver main body side toward the composite hopper side, and the blow duct to the composite hopper side. An asphalt pavement machine comprising a variable louver capable of adjusting the direction of a blown wind.

  According to this configuration, by adjusting the variable louver, the direction of the wind blown from the air duct toward the composite hopper side is adjusted by the direction of the natural wind, and the smoke rising from the composite hopper flows to the operator station side. Can be minimized.

  According to a second aspect of the present invention, in the configuration according to the first aspect, the smoke reduction device is provided in the engine bonnet covering the engine, and the fan is a cooling fan for the engine. The air blowing portion of the air duct corresponds to an air outlet provided on the front side of the engine bonnet, and the variable louver provides an asphalt paving machine provided at the air outlet of the engine bonnet. To do.

  According to this configuration, since the fan for generating the wind blown toward the composite hopper side is also used as the engine cooling fan, it is not necessary to provide a new fan for the smoke reduction device, and the number of parts is reduced. The increase can be suppressed.

  According to a third aspect of the present invention, there is provided the asphalt pavement machine according to the first or second aspect, wherein the louver can adjust the blowing direction of the wind in the left-right and vertical directions.

  According to this configuration, the direction of the wind blown toward the composite hopper can be adjusted to the left and right and up and down directions according to the direction of the natural wind, and can be efficiently blown out in a more preferable direction.

Further, an invention according to claim 4, wherein, in the configuration of claim 2 Symbol placement, the air duct is introduced outside air from one side of the engine hood, from the air outlet of the engine hood front through the engine Asphalt pavement having an openable louver that can be switched from the route of the air flow discharged to the composite hopper side to the route of the air flow prioritizing engine cooling that takes outside air from one side of the engine bonnet and discharges it from the other side Provide machines.

  According to this configuration, when the open / close louver is switched, the outside air is taken in from one side of the engine bonnet and discharged from the air outlet on the front of the engine bonnet to the mixed hopper side through the engine. It is possible to switch from an air flow route that simultaneously reduces mist and smoke to an air flow route that prioritizes engine cooling that takes outside air from one side of the engine bonnet and exhausts it from the other side. That is, in the case where outside air is taken in from one side of the engine bonnet and this outside air flows through the engine so as to be discharged from the air outlet on the front surface of the engine bonnet to the composite hopper side, the air flow path is bent in the middle. As a result, the flow becomes worse and the engine cooling performance decreases. For this reason, when the outside air temperature is high, if the outside air is taken in from one side of the engine bonnet and then discharged from the other side to switch to the air flow route that prioritizes engine cooling, the air will flow smoothly and the engine will overheat. Can be prevented.

  According to the first aspect of the present invention, by adjusting the variable louver, the direction of the wind blown toward the composite hopper is adjusted according to the direction of the natural wind, and the smoke rising from the composite hopper flows to the operator station side. Therefore, the effect of improving the operator's working environment can be expected.

  The invention according to claim 2 can suppress an increase in the number of parts by combining the fan for generating the wind blown toward the composite hopper side with the cooling fan for the engine. In addition to the effects of the invention, it can be expected that the cost can be reduced and provided at low cost.

  In the invention according to claim 3, the direction of the wind blown toward the composite hopper side is adjusted to the left and right and up and down directions according to the direction of the wind in the natural world so as to blow out efficiently in a more preferable direction. Since it is possible to minimize the smoke rising from the hopper to the operator station side, in addition to the effect of the first or second aspect of the invention, an effect of further improving the operator's work environment can be expected.

  In the invention according to claim 4, when the open / close type louver is switched when the outside air temperature is high, the outside air is taken in from one side of the engine bonnet and discharged from the other side, so that the air flows smoothly around the engine. Since overheating of the engine can be prevented, in addition to the effects of the first, second or third aspect of the invention, further protection of the machine and improvement of the operator's working environment can be expected.

The side view of the asphalt pavement machine which concerns on embodiment of this invention. It is a figure explaining the structure of the engine bonnet periphery in an asphalt pavement machine same as the above, (a) is the top view, (b) is an expanded sectional view explaining the structure of an openable louver. The principal part front view which looked at the engine bonnet in the main body of a paving machine of an asphalt paving machine same as the above. The enlarged front view of the variable louver in an asphalt pavement machine same as the above. The enlarged plan view of a variable louver same as the above. The enlarged side view of a variable louver same as the above.

  The present invention adjusts the direction of the wind blown toward the composite hopper according to the direction of the natural wind so that the smoke rising from the composite hopper can be prevented from flowing to the operator station. Asphalt pavement machine equipped with a smoke reduction device, which is self-propelled by the driving force of the installed engine and has an operator station on the upper rear side, and moves integrally with the front side of the pavement machine main body An asphalt pavement machine comprising a mix hopper disposed in a possible manner, and comprising a fume reduction device for reducing the fume that travels from the asphalt mix contained in the mix hopper to the operator station. A fan, an air duct that blows air generated by the fan from the paver main body side toward the composite hopper side, and the air duct It was achieved by having the structure and a variable louvers adjustable orientation of wind blown into the mixture member hopper side from.

  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.

  FIG. 1 is an external side view of an asphalt finisher shown as an example of an asphalt pavement machine according to the present invention, FIG. 2 is a view showing a configuration around an engine bonnet in the same asphalt pavement machine, (a) is a plan view thereof, (b) These are expanded sectional views explaining the structure of an open / close type louver. In the following description, the right and left direction (arrow D) in FIG. 1 will be described as the front and left side of the asphalt pavement machine, the up and down direction will be up and down, and the direction perpendicular to the page will be left and right.

  In FIG. 2, the asphalt finisher 11 includes a vehicle body 13 supported by a crawler 12 (hereinafter referred to as a “paving machine main body 13”). As shown in FIG. This is a self-propelled vehicle that travels with the power of the engine 15 mounted in the power unit 14 provided in the section.

  The power unit 14 provided in the paving machine main body 13 and the engine 15 mounted on the power unit 14 are covered and protected by an engine bonnet 16 from the outside so as to be opened and closed. A plurality of vent holes 17 are formed in the left and right side surfaces 16a and 16b of the engine bonnet 16, respectively. Further, an exhaust gas chimney 30 for discharging exhaust gas generated by the engine 15 into the atmosphere and dissipating it is provided on the upper front side of the paver main body 13 so as to protrude upward.

  On the other hand, an operator station 20 is provided on the upper rear side (upper rear surface) of the paver main body 13 and is attached with a driver seat 19 on which an operator who operates the asphalt finisher 11 is seated.

  Further, a composite hopper 21 for accommodating asphalt composite is provided on the front side of the paver main body 13, and a paver main body is provided on the rear side via a screw spreader (delivery device) 22 and a leveling arm 23a. A screed device 23 attached to 13 is provided, and a feeder device (not shown) for conveying the asphalt composite in the composite hopper 21 to the screw spreader 22 is provided inside the paver main body 13. .

  In the asphalt finisher 11, the heated asphalt mixture is carried by a dump truck and loaded into the mixture hopper 21. The asphalt composite material loaded on the composite material hopper 21 is conveyed to the rear of the paver main body 13 by the feeder device and dropped onto the screw spreader 22.

  The screw spreader 22 rotates the screw blades by the rotation of a screw shaft driven by a motor (not shown), and the asphalt mixture sent by the feeder device is used for the front full width (lateral width in the left-right direction) of the rear screed device 23. ) And spread evenly. In the screed device 23, the asphalt mixture spread on the pavement surface by the screw spreader 22 is spread and leveled to finish 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 according to the present invention will be described. The characteristic is that the smoke reduction device 18 is provided inside the front part of the engine bonnet of the paver main body 13. In the smoke reduction device 18, the heated asphalt mixture is transported by a dump truck and stored in the mixture hopper 21, so that the smoke S rising from the asphalt mixture in the mixture hopper 21 (see FIG. 1). Is blown off to the front of the composite hopper 21 to dissipate it, reducing the amount of smoke flowing to the operator station side, and reducing the influence on the operator.

  The configuration of the smoke reduction device 18 will be described in detail below. As shown in FIG. 2 (a), the smoke reduction device 18 covers the outside of the power unit 14 and the engine 15 and is provided in an engine bonnet 16 attached to the front portion of the paver main body 13. And a fan 25 for cooling the engine, a variable louver 26 provided at the air outlet 16c formed in the front surface of the engine bonnet 16, an openable louver 27 provided in the air duct 24, and the like. .

  As shown in FIG. 2, the air duct 24 sucks the outside air 100 sucked from the air holes 17 of the one side surface 16 a of the engine bonnet 16 when the fan 25 for cooling the engine is rotated. An air flow path formed on the front surface of the engine bonnet 16 through the power unit 14 and the engine 15 and the air flow passage exhausted from the vent hole 17b on the other side surface 16b of the engine bonnet 16 and the surface of the power unit 14 and the engine 15. An air flow passage for exhausting air from the outlet 16c is formed.

  The openable louver 27 is provided in the air duct 24 as shown in FIG. 2 (a), and has a plurality of blades 27a as shown in FIG. 2 (b). Each of the slats 27a can be rotated about the shaft 28 as a fulcrum, and the opening 29 of the openable louver 27 can be adjusted from substantially fully closed to fully open by rotating. This adjustment can be performed manually or automatically by means not shown. FIG. 2 (b) shows a state where the slats 27a are fully opened, and when the blades 27a are rotated to the position indicated by the dotted line, they can be fully closed.

  When the slats 27a are in the fully open position, the openable louver 27 mainly sends the outside air 100 that has been fed into the air duct 24 by the engine cooling fan 25 and passed through the power unit 14 and the engine 15 into the side surface. When the first air flow route (29a) for giving priority to cooling of the engine 15 by flowing smoothly to the vent hole 17 side of the 16b is formed and the vane plate 27a is in the fully closed position, A second air flow route (29 b) is formed in which the outside air 100 that has been sent into the air duct 24 by the fan 25 and has passed through the power unit 14 and the engine 15 is discharged from the air outlet 16 c on the front surface of the engine bonnet 16. To do.

  The reason why the openable louver 27 is provided in this way so that it can be switched between the first air flow route (29a) and the second air flow route (29b) is that the outside air temperature is high. This is because if the outside air 100 taken in from the side surface 16a is not allowed to flow smoothly through the vent hole 17 on the side surface 16b, the cooling performance of the engine 15 is lowered and the engine 15 may be overheated. Therefore, when the outside air temperature is high, the first air flow route (29a) giving priority to engine cooling is set, and when the outside air temperature is low, the route is switched to the second air flow route (29b). In the case where the rotation amount of the slats 27a is set in the middle of the fully open to fully closed state, the air that has passed through the engine 15 is made to flow through the first air flow route (29a) and the second air according to the rotation amount. It can be distributed to the flow route (29b).

  As shown in FIGS. 2 and 3, the variable louver 26 is provided in an air outlet 16 c on the front surface of the engine bonnet 16. Further, as shown in FIGS. 4 to 6, it has a horizontal blade 26 a whose direction can be adjusted in the vertical direction and a vertical blade 26 b whose direction can be adjusted in the left-right direction. Then, by adjusting the direction of the horizontal slats 26a and the vertical slats 26b, the direction of the air blown out from the blower duct 24 through the air outlet 16c toward the upper portion of the composite hopper 21 is adjusted in the horizontal and vertical directions. Be able to. The inclination adjustment of the horizontal slat 26a and the vertical slat 26b here is manually performed, but can be automatically performed. In addition, the vertical blade 26b shown with a dashed-two dotted line in FIG. 5 has shown an example of the swing width to the left-right direction.

  The operation of the smoke reduction device 18 configured in this way will be described. Normally, the openable louver 27 adjusts and holds the slats 27a fully closed. When the engine 15 is driven and the fan 25 rotates, outside air is sucked from the vent hole 17 of the one side surface 16a of the engine bonnet 16 and is sent into the air duct 24, and passes through the power unit 14 and the engine 15 to be air. It blows off from the blower outlet 16c to the upper part of the composite material hopper 21 arrange | positioned at the front side of the pavement machine main body 13. FIG. A two-dot chain line in FIG. 1 shows a state in which air is blown out from the air outlet 16 c toward the upper portion of the composite material hopper 21.

  When air is blown out toward the upper portion of the composite hopper 21 in this way, the smoke S rising from the asphalt composite stored in the composite hopper 21 rides on the blown air. It blows away in front of the composite hopper 21 and dissipates. As a result, the amount of smoke directly flowing from the composite hopper 21 to the operator station 20 side is drastically reduced, and the adverse effect of the smoke on the operator can be reduced. Therefore, the pressure (wind pressure) of the air blown out from the air outlet 16c here has a wind pressure large enough to blow off the smoke S in front of the composite hopper 21.

  Further, when affected by the wind direction in the natural world, the air blown from the air outlet 16c is adjusted by adjusting the direction of the horizontal slat 26a and the vertical slat 26b of the variable louver 26 according to the wind direction. The wind effect of the natural world can be eliminated by blowing out with adjusting the direction of left and right and up and down. A two-dot chain line shown in FIG. 1 shows an example of the vertical swing width, and a two-dot chain line shown in FIG. 2A shows an example of the horizontal swing width.

  Further, when the outside air temperature is high, by adjusting the inclination of the slats 27a of the openable louver 27, the air flows through the first air flow route (29a) and the second air flow route (29b), respectively. The flow rate of air can be adjusted.

  In the above embodiment, a structure is disclosed in which air is blown out from the air outlet 16c toward the upper portion of the composite hopper 21 by using the wind generated by the engine cooling fan. Is also good. However, when the engine cooling fan is also used, an increase in the number of parts can be suppressed.

  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 other than the asphalt finishers shown as examples.

11 Asphalt finisher 12 Crawler 13 Car body (Pavement machine main body)
14 Power unit 15 Engine 16 Engine bonnet 16a Side face 16b Side face 16c Air outlet 17 Ventilation hole 18 Smoke reducing device 19 Driver's seat 20 Operator station 21 Composite hopper 22 Screw spreader 23 Screed device 24 Air duct 25 Fan 26 for engine cooling Variable louver 26a Horizontal slat 26b Vertical slat 27 Openable louver 27a Slat 28 Opening 29a First air flow route 29b Second air flow route 30 Exhaust gas chimney

Claims (4)

A pavement machine body that is self-propelled by the driving force of the mounted engine and that has an operator station on the upper rear side; and a composite material hopper that is disposed so as to be integrally movable on the front side of the pavement machine body. In an asphalt pavement machine provided with a fume reduction device for reducing the fume from the asphalt mixture housed in a hopper toward the operator station,
The smoke reduction device includes a fan, a blower duct that blows the wind generated by the fan from the paver main body side toward the composite hopper side, and a direction of the wind that blows from the blow duct to the composite hopper side An asphalt pavement machine comprising an adjustable louver.   The smoke reduction device is provided in the engine bonnet that covers the engine, and the fan also serves as a cooling fan for the engine, and the blowout portion of the air in the air duct is a front side of the engine bonnet. The asphalt pavement machine according to claim 1, wherein the variable louver is provided at the air outlet of the engine bonnet, corresponding to the air outlet provided in the engine bonnet.   The asphalt pavement machine according to claim 1 or 2, wherein the louver is configured such that a wind blowing direction can be adjusted in a horizontal direction and a vertical direction. The air duct takes in outside air from one side of the engine bonnet, and from the route of the air flow that passes through the engine and is discharged from the air outlet on the front surface of the engine bonnet to the composite hopper side, one aspect incorporating external air from asphalt paving machine of claim 2 Symbol mounting, characterized in that it comprises a retractable louvers can be switched to the root of the air flow of the engine cooling priority discharged from the other side.

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