JPH09279511A - Asphalt finisher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an asphalt finisher improving work environment and protecting environment by eliminating harmful gas generated from asphalt grout at the time of paving. SOLUTION: When a tractor part 5 self-advances while scattering asphalt grout AG on the road surface R, and a screed 7 towed by the tractor part 5 paves the road surface R with the scattered asphalt grout AG, harmful gas is generated from the asphalt grout AG staying between the tractor part 5 and the screed 7. A cover 9 is therefore provided between the tractor part 5 and the screed 7. A suction device 27 sucks the harmful gas by a first suction hose 39 with one end opened to the inside of the cover 9, and a purifying device 31 purifies this harmful gas and exhausts it. Since harmful gas is generated also in case of using a width enlarging device 21 of the screed 7 according to paving width, a width enlarged part cover 23 is provided, and the harmful gas is sucked by a second suction hose 41 with one end opened to the inside of the width enlarged part cover 23, and then purified and exhausted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt finisher, and more particularly to an asphalt finisher that takes measures against asphalt fumes, which are harmful gases generated during asphalt paving.

[0002]

2. Description of the Related Art Conventionally, when asphalt paving a road by an asphalt finisher for asphalt composite material paving, the asphalt composite material carried by a transportation truck is supplied to a hopper, and the asphalt composite material is spread on the road surface from this hopper. The asphalt mixture is spread in the road width direction with a screw auger and paved with a screed.

Therefore, the asphalt mixture is accumulated between the rear part of the tractor part which is the towing part of the asphalt finisher and the screed which is the pavement part, and asphalt fumes which are smoke-like gas are generated from this asphalt mixture. Further, the asphalt mixture is also accumulated in extensions and wideners used at a pavement site where paving is performed with a width larger than that of the asphalt finisher, and asphalt fumes are generated.

[0004]

However, in such a conventional technique, since no measures are taken against the asphalt fumes, which are the harmful gases generated as described above, the tractor portion which is the towing portion. There is a problem that asphalt fumes fly up between the screed, which is the pavement part, and from the extension part, and the working environment is significantly damaged.

The object of the present invention was made by paying attention to the above-mentioned conventional techniques, and improves the working environment by removing the asphalt fumes generated from the asphalt mixture during pavement and protects the environment. It is to provide an asphalt finisher that can be designed.

[0006]

In order to achieve the above object, the asphalt finisher of the invention according to claim 1 is a tractor section which is self-propelled while sprinkling the supplied asphalt mixture on the road surface and towed by this tractor section. An asphalt finisher having a screed that spreads and spreads asphalt mixture on a road surface, and a cover that covers a gap between the tractor portion and the screed, and a portion that is covered by the cover and has the portion that is covered. First suction hose for sucking the smoke-like gas generated from the asphalt mixture material, the suction device to which the other end of the first suction hose is attached, and the smoke-like device connected to the suction device. A cleaning device for purifying and discharging the gas is provided.

Therefore, the tractor section is self-propelled while sprinkling the asphalt mixture supplied to the hopper on the road surface, and the asphalt mixture that is sprinkled by the screed towed by the tractor section is laid on the road surface. Hazardous gas is generated from the asphalt mixture accumulated between and. For this reason, a cover is provided between the tractor portion and the screed, and the suction device sucks the harmful gas by the first suction hose having one end opened inside the cover, and the cleaning device removes the sucked harmful gas. Purify and discharge.

According to a second aspect of the invention, there is provided an asphalt finisher having a widening portion cover which is attached to the screed according to the first aspect and covers a widening device which can be widened in the paving width direction. The widening portion cover has one end in the widening portion cover. A second suction hose, the other end of which is attached to the suction device, is provided.

[0009] Therefore, the screed widening device is expanded and contracted according to the pavement width for pavement, and harmful gas is generated from the asphalt mixture also in this widening device. Therefore, the widening portion cover covers the widening device, and the harmful gas generated inside the widening portion cover is sucked, purified and discharged by the second suction hose having one end opened inside the widening portion cover.

An asphalt finisher according to a third aspect of the present invention is characterized in that the widening portion cover according to the second aspect is capable of widening along the widening device.

Therefore, since the widening portion cover is expanded together with the widening device, it is possible to surely cover the entire widening device when the widening device is operated.

An asphalt finisher according to a fourth aspect of the present invention is characterized by comprising a discharge pipe integrally provided with the suction device and the cleaning device according to the first aspect.

Therefore, the harmful gas is sucked by the suction device provided in the discharge pipe, and the cleaning device purifies and discharges the harmful gas.

An asphalt finisher according to a fifth aspect of the invention is a pressure sensor for detecting the pressure inside the cleaning device according to the first, second and fourth aspects, and controls the suction device based on a signal from the pressure sensor. And a control device that determines and displays the control and operating state of the cleaning device.

Therefore, the pressure sensor detects the pressure of the gas inside the cleaning device to detect the degree of clogging of the cleaning device, and the control device appropriately controls the suction device based on the signal from the pressure sensor. Further, the cleaning time of the cleaning device or the like is detected and displayed from the degree of clogging.

The asphalt finisher of the invention according to claim 6 is a smoke sensor provided inside the cover and / or the widening part cover according to claim 1, and the suction device based on a signal from the smoke sensor. And a control device for turning on / off the cleaning device.

Therefore, when the smoke sensor detects smoke inside the cover or the widening part cover and sends a signal to the control device, the control device automatically turns on or off the suction device and the cleaning device.

An asphalt finisher according to a seventh aspect of the present invention is characterized in that the cleaning device according to the first, second and fourth aspects comprises a filtering device and a deodorizing device.

Therefore, the filtering device of the cleaning device filters the sucked harmful gas, and the deodorizing device eliminates the odor of the filtered gas and discharges it.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 and 2 show an asphalt finisher 1 for paving an asphalt mixture according to the present invention. The asphalt finisher 1 has a front portion provided with wheels 3 by a drive device (not shown) mounted inside.
A finisher main body 5 which is a tractor portion that is driven to rotate is provided, and a screed 7 which is a paving portion is pulled behind the finisher main body 5. A hood 9 as a cover is provided between the finisher body 5 and the screed 7.

A hopper 11 is provided at the front part of such an asphalt finisher 1 so as to open upward, and the asphalt mixture carried by a carrying truck is supplied to the hopper 11. Inside the hopper 11, a bar feeder 13 which is a conveyor for feeding the supplied asphalt mixture to the rear is provided so as to be movable rearward.

Behind this bar feeder 13, a screw auger 15 for hanging the asphalt mixture material AG sent to the road surface R by the bar feeder 13 to both widthwise outsides is provided in a state of being hung downward. ing.

A pair of leveling arms 17 is provided on the left and right side surfaces of the finisher main body 5 at the rear position of the rotary shaft 1.
9 is swingably supported in the vertical direction, and a screed 7 is suspended from the rear end of the leveling arm 17.

In order to lay the asphalt with a width larger than the width of the asphalt finisher 1, the screed 7 is provided with extensions 21, which are widening devices, on both the left and right outer sides so as to be expandable outward. An extension hood 23 is provided to cover the extension 21 as a widened portion cover.

Each leveling arm 17 is swingable vertically in a vertical plane about the rotary shaft 19 by a screed cylinder 25 provided at the rear portion thereof.

On the upper surface of the finisher main body 5, a blower 27 and a drive motor 29 which are suction devices, a filter 31 which is a cleaning device, a deodorizing device 33, and a pressure sensor 3 are provided.
5 and the like are provided. These are connected to the control device 37, and the air volume and the like are controlled based on the detection signal from the pressure sensor 35, and the cleaning time is displayed by determining clogging of the filtration filter 31.

A pair of first suction hoses 39 extending below the hood 9 between the finisher body 5 and the screed 7 are attached to the filtration filter 31. A second suction hose 41 extending inside the left and right extensions 21 is also attached to the filtration filter 31.

An air amount adjusting damper 43 for adjusting the amount of suction is provided near each of the connection portions of the first suction hose 39 and the second suction hose 41 with the filtration filter 31.

Therefore, the asphalt mixture carried by the carrying truck is supplied to the hopper 11, and the hopper 1
The bar feeder 13 inside the 1 conveys the supplied asphalt mixture to the rear. Asphalt mix AG carried
Is spread on the road surface R in the width direction by the screw auger 15, and the screed 7 and the extension 21 whose height is adjusted by the screed cylinder 25 paves the asphalt mixture AG.

During the paving work, by turning on the switch of the drive motor 29 for driving the blower 27, the asphalt fume AF generated from the asphalt mixture AG accumulated in front of the screed 7 is passed through the first suction hose 39. In addition, the asphalt fume AF generated from the asphalt mixture AG stored inside the extension 21 is blown through the second suction hose 41 to the blower 27.
, And removes harmful components through the filter 31 and removes and discharges malodor through the deodorizer 33.

Alternatively, smoke sensors 45 and 47 are provided inside the hood 9 and the extension hood 23 and are connected to the control device 37. If smoke generated from the asphalt fume AF is detected during work, the blower 27 is automatically operated. The switch of may be turned on.

From the above results, the asphalt fumes AF generated during asphalt paving with the asphalt mixture AG are sucked, filtered, deodorized and released into the atmosphere, so that the working environment of the worker is improved. In addition, the environment around the site can be prevented from deteriorating.

When smoke is detected by the smoke sensors 45 and 47, the switch of the blower 27 is automatically turned on so that the worker does not forget to switch on the blower 27, and the work can be performed. The safety can be secured.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. That is, the arrangement and the like of the first and second suction hoses 39 and 41 are not limited to those shown in the drawing, but may be arranged at appropriate positions according to the type of the asphalt finisher 1.

Further, in the above-mentioned embodiment, the filtration filter 31, the blower 27, the deodorizing device 33 and the like are provided respectively, but an exhaust pipe may be provided in which they are all integrated, and the shape thereof may be provided. Is not limited to the one shown.

[0037]

As described above, in the asphalt finisher according to the first aspect of the invention, the tractor section is self-propelled while sprinkling the asphalt mixture supplied to the hopper on the road surface, and the screed towed by the tractor section is sprinkled. The cut asphalt mixture is laid on the road surface. At this time, harmful gas is generated from the asphalt mixture accumulated between the tractor section and the screed. For this reason, a cover is provided between the tractor portion and the screed, and the suction device sucks the harmful gas by the first suction hose having one end opened inside the cover, and the cleaning device purifies and discharges the harmful gas. Therefore, not only the working environment can be improved but also the environmental deterioration in the vicinity of the site can be prevented.

In the asphalt finisher according to the second aspect of the present invention, when the screed widening device is expanded and contracted according to the pave width to perform paving, harmful gas is also generated from the asphalt mixture in this widening device. For this reason, the widening device cover is covered by the widening device cover, and the harmful gas generated inside the widening device cover is sucked, purified and discharged by the second suction hose having one end opened inside the widening device cover. Not only the improvement but also the environmental deterioration in the vicinity of the site can be prevented.

In the asphalt finisher according to the third aspect of the invention, since the widening portion cover is expanded together with the widening device, the entire widening device can be surely covered when the widening device is activated, and harmful gas can be effectively purified. .

In the asphalt finisher according to the invention of claim 4, since the harmful gas is sucked by the suction device provided in the discharge pipe and the cleaning device purifies and discharges the harmful gas, the purification is easily performed by the compact device. It can be carried out. It can also be installed in a small space.

In the asphalt finisher according to the fifth aspect of the present invention, the pressure sensor detects the clogging degree of the cleaning device by detecting the pressure of the gas inside the cleaning device,
Since the control device appropriately controls the suction device based on the signal from the pressure sensor, stable operation can always be performed. Further, since the control device can detect and display the cleaning time of the cleaning device and the like based on the degree of clogging, maintenance and repair of the cleaning device and the like become easy.

In the asphalt finisher according to the sixth aspect of the present invention, the smoke sensor detects the smoke inside the cover or the widening part cover and sends a signal to the control device, and the control device automatically performs suction and cleaning based on this signal. Since the device is turned on or off, the cleaning device or the like can be reliably operated when harmful gas is generated.

In the asphalt finisher according to the invention of claim 7, since the filtering device of the cleaning device filters the sucked harmful gas and the deodorizing device eliminates the odor of the filtered gas and discharges it, only the working environment is improved. In addition, it is possible to prevent environmental deterioration near the site.

[Brief description of drawings]

FIG. 1 is a side view showing an entire asphalt finisher according to the present invention.

FIG. 2 is a plan view showing the entire asphalt finisher according to the present invention.

[Explanation of symbols]

 1 Asphalt Finisher 5 Finisher Main Body (Tractor Part) 7 Screed 9 Hood (Cover) 11 Hopper 21 Extension (Expansion Device) 23 Extension Hood (Expansion Device Cover) 27 Blower (Suction Device) 31 Filtration Filter (Cleaning Device, Filtration Device) 33 Deodorizing device 35 Pressure sensor 37 Control device 39 First suction hose 41 Second suction hose 45, 47 Smoke sensor AG Asphalt mixture R Road surface

Claims (7)

[Claims] 1. An asphalt finisher comprising a tractor section that is self-propelled while sprinkling the supplied asphalt mixture on the road surface, and a screed that is pulled by the tractor section and spreads the asphalt mixture on the road surface. A cover that covers the gap between the tractor portion and the screed, and a first suction hose that has one end in the portion covered by the cover and that sucks smoke-like gas generated from the asphalt mixture in the covered portion. An asphalt finisher comprising a suction device to which the other end of the first suction hose is attached, and a cleaning device connected to the suction device to purify and discharge the smoke-like gas. . 2. A widening part cover which is attached to the screed and covers a widening device which can be widened in the pave width direction, and a second end which has one end inside the widening part cover and is attached to the suction device on the other end side. The asphalt finisher according to claim 1, further comprising: 3. The asphalt finisher according to claim 2, wherein the widening portion cover is widen along the widening device. 4. The asphalt finisher according to claim 1, further comprising a discharge pipe integrally provided with the suction device and the cleaning device. 5. A pressure sensor for detecting the pressure inside the cleaning device, and a control device for controlling the suction device based on a signal from the pressure sensor and for determining / displaying the control and operating state of the cleaning device. The asphalt finisher according to claim 1, 2, or 4, comprising: 6. A smoke sensor provided inside the cover and / or the widening part cover, and a control device for turning on / off the suction device and the cleaning device according to a signal from the smoke sensor. Claim 1 characterized in that
The asphalt finisher described in 2 or 4. 7. The asphalt finisher according to claim 1, 2, or 4, wherein the cleaning device comprises a filtering device and a deodorizing device.