JPS6219688Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device that regenerates conventional asphalt pavement, such as an asphalt pavement, while running on its own.

Generally, on roads paved with asphalt composite materials, the paved surface plastically deforms into uneven shapes over time due to the passage of heavy vehicles, etc., and tires installed on cars to prevent slips in cold and snowy regions. Chains and spiked tires cause wear and tear, causing ruts or depressions on the pavement surface. moreover,
Cracking and peeling also occur due to aging of the asphalt mixture.

The surface of the paved road (asphalt pavement) where these irregularities and ruts have occurred is repaired and regenerated by reusing the conventional asphalt mixture while driving on the asphalt pavement, thereby improving the safety of vehicle driving and regenerating it. Devices have been proposed to improve work efficiency and reduce repair costs. Such a conventional example is shown in FIG. 1 (see Japanese Patent Laid-Open No. 75004/1983). This device is configured to be self-propelled by driving wheels 3 by an engine 2 mounted on a chassis 1. and,
While traveling on the asphalt pavement to the left in FIG. 1, the asphalt surface layer 5 on the pavement surface is heated and softened by a heating device provided at the bottom of the chassis 1. The heated and softened asphalt surface layer 5 is cut and crushed to a predetermined depth by a cutter device 6, and the crushed conventional asphalt composite material is cut into a screw having two screw halves extending laterally in opposite directions. 7, the mixture is collected in the center of the road and further guided to a stirring device 8 in which a screw feeder 8a is housed.

On the other hand, a new asphalt paving material 10 is loaded into a hopper 9 attached to the front end of the vehicle 1 from a transport vehicle (not shown). Then, by tilting the hopper 9 clockwise in the figure, the new asphalt paving material 10 is dropped onto the conveying belt 12 from the discharge opening 11 equipped with a measuring function on the side of the hopper 9, and is conveyed rearward to the hopper. state gate 13
The mixture is then put into the stirring device 8.

Then, the crushed asphalt mixture and the new asphalt paving material 10 are stirred and mixed by the screw feeder 8a of the stirring device 8, and the bottom of the asphalt surface layer 5 scraped up from the rear part of the stirring device 8 (the remaining asphalt surface layer or asphalt base layer).

The mixed asphalt pavement material is uniformly stretched and leveled in the horizontal direction by a leveling screw 15, and then compacted by a screed 16 to form a new asphalt pavement 17. Here, the leveling screw 15 and the screed 16 constitute a leveling device.

In addition, 18 is a mounting member for adjusting the cutting depth by moving the cutter device 6 in the vertical direction in the figure, 19 is a heating device for uniformly heating the asphalt mixture cut and turned over by the cutter device 6, 20
is a tank that supplies asphalt pavement heating fuel to both heating devices 4 and 19 through a conduit 21.

By the way, as shown in FIGS. 2A to 2C, the following three methods have conventionally been used to regenerate and repair asphalt surface layers. That is, when the asphalt surface layer ages, the supply amount of the new asphalt pavement material is adjusted according to the degree of aging, thereby creating a single layer new asphalt pavement 22a in which the new asphalt pavement material and the loosened asphalt mixture are mixed. (Fig. 2 A, hereinafter referred to as 1st
When the asphalt surface layer has not aged, the supply of new asphalt paving material is stopped and the loosened asphalt mixture is stirred to improve the quality of the conventional asphalt mixture laid on roads. A construction method in which a new single-layer asphalt pavement 22b is formed by adding recycled additives as necessary and regenerating the new asphalt pavement 22b (Fig. 2B, hereinafter referred to as the second construction method).
It consists of two layers: an asphalt mixture layer 22c that is leveled by stirring and regenerating the scraped asphalt mixture, and a new asphalt paving material layer 22d in which a new asphalt paving material is disposed on the mixture layer. Construction method for forming a new asphalt pavement layer (Fig. 2C,
Hereinafter referred to as the third construction method) has been adopted. Note that 23 is an asphalt base layer, 24a is a roadbed, and 24b is a roadbed, and a recycling additive is added to the asphalt mixture as necessary.

However, in the above-mentioned conventional asphalt pavement regeneration device, the new asphalt pavement material 10
Since it uses a single-function conveying means that supplies only the agitation device 8, it is possible to perform construction by selecting the first method or the second method. The third method of laying new asphalt paving material could not be carried out.

The present invention was developed in view of these conventional problems, and is capable of supplying new asphalt paving material to the front of the leveling device in addition to the conveying and feeding device that supplies new asphalt paving material to the stirring device. It is an object of the present invention to provide an asphalt pavement regeneration device that can selectively switch between the first to third construction methods, etc. by providing a second conveyance and supply device and selectively operating or stopping the device. do.

The present invention will be explained below based on an embodiment shown in FIGS. 3 to 8.

In Fig. 3, a steering wheel 25 and a driving wheel 2 are shown at the bottom.
6, an engine 28 is mounted on the chassis 27, which drives the driving wheels 26 to cause the device to travel. A pair of infrared heating devices 29 are installed at the front end of the chassis 27 to face a conventional asphalt surface layer laid on an asphalt base layer and heat and soften the surface layer. A cutter device 30 for scraping the asphalt surface layer that has been softened by heating is attached to the lower part of the vehicle chassis 27 behind the heating device 29 via a support member 31. The support member 31 is formed to expand and contract in the vertical direction in the figure by a hydraulic mechanism (not shown), and is configured such that by controlling the expansion and contraction of the support member 31, the position of the cutter device 30 can be controlled and the repair depth of the asphalt surface layer can be set. .

As shown in FIGS. 4 and 5, the cutter device 30 has a main rotor 33 that is rotationally driven by a motor 32 and extends in the vehicle width direction.
A spiral-shaped blade 33a is provided in the central part to gather the scraped conventional asphalt composite material to the central part, and is attached to the blade 33a via a holder 33b for heating and softening. A plurality of bits 33c are provided in the axial direction and the circumferential direction for scraping the asphalt surface layer to a predetermined depth. Furthermore, sub-rotors 35 are mounted on both sides of the main rotor 33, and are each rotatably driven by a motor 34 and moved up and down independently by a hydraulic mechanism (not shown).
is provided with a spiral blade 35a for feeding the scraped asphalt mixture into the main rotor 33, and a holder 35 is provided on the blade 35a.
A bit 35c is installed through the bit 35c to scrape the asphalt surface layer which has been heated and softened. Further, behind the main rotor 33 and the sub rotor 35, there is a bracket 36 attached to the support member 31.
Blades 37a and 37b are provided, respectively, suspended by blades 37a and 36b and in contact with the asphalt mixture. Bracket 36a at the center of the main rotor 33
The blade 37b is removed to form an opening 39 through which the asphalt mixture collected by the sub rotor 35 and the main rotor 33 is sent to the stirring device 38 at the rear.

At the bottom of the chassis 27 behind the cutter device 30 is a stirring device 3 that stirs the asphalt mixture collected by the cutter device 30 and fed through the opening 39.
8 is provided. As shown in FIGS. 6 and 7, the stirring device 38 includes a case 40 with an open bottom.
A pair of shafts 42 housed inside and rotationally driven by a motor 41 extend in the longitudinal direction of the chassis 27, and blades 43 that rotate together with the shafts 42 to agitate the asphalt mixture are mounted on these shafts 42 in the axial direction. and a plurality of them are provided in the circumferential direction (arranged in a spiral shape). The upper part of the case 40 has an opening into which a new asphalt paving material supplied from a conveyor, which will be described later, is introduced. Further, at the rear of the stirring device 38, a first screw feeder 45 is provided, which is supported on the wall of the case 40 and is rotationally driven by a motor 44 to uniformly spread the asphalt mixture discharged from the stirring device 38. This first screw feeder 45 extends in the vehicle width direction and is connected to a motor 44.
Spiral-shaped blades 48 are formed on a shaft 46 that is rotationally driven by a shaft 46, which are formed in opposite directions from the center and convey the asphalt mixture discharged from the stirring device 38 from the center toward both sides and spread it uniformly. It is formed by being attached.

Further, on the chassis 27 behind the first screw feeder 45, as shown in FIG. It is suspended via a guide frame 51 that is moved up and down by a hydraulic cylinder 50. The pair of first screeds 49a and 49b are offset from each other in the longitudinal direction of the vehicle chassis 27 and extend in the vehicle width direction, and are moved in the vehicle width direction by a hydraulic cylinder (not shown) to shift the screed in the vehicle width direction. The width of the asphalt mixture to be compacted can be freely set by changing the overall length, and the asphalt mixture is moved up and down by the hydraulic cylinder 50, and the main body is vibrated by a vibration device (not shown) to compact the asphalt mixture. has been done.

The chassis 27 behind the pair of first screeds 49a and 49b is provided with a first
A second screw feeder 55 is provided which is rotationally driven by a motor 54 and evenly spreads the new asphalt paving material 53 supplied onto the asphalt mixture layer 52 compacted by the screeds 49a and 49b. 2nd screw feeder 55
Similar to the first screw feeder 45,
It is formed by attaching spiral blades 55b formed in opposite directions from the center to a shaft 55a that is rotationally driven by a motor 54.

On both sides of the vehicle chassis 27 above the second screw feeder 55, leveling arms 56 are attached to the tips of hydraulic cylinders 59 whose base ends are pivotally supported at the bottom of the vehicle chassis 27, and are freely swingable.
The first screeds 49a, 49b are provided at the rear end.
Similarly, a pair of second screeds 58 are offset from each other in the longitudinal direction of the chassis 27 and extend in the vehicle width direction.
a and 58b are provided at the rear of the second screw feeder 55.

Further, a hopper 60 for storing new asphalt paving material 53 supplied from a transport vehicle (not shown) is provided at the front end of the chassis 27, and a new asphalt paving material 53 is provided at the center of the chassis 27 from the bottom of the hopper 60 driven by a motor 61. The aged asphalt mixture is regenerated by a first feeder 63 consisting of a bar conveyor that transports the scraped asphalt paving material to a hopper-shaped surge tank 62 and a spray nozzle 64 via a pump (not shown). For this purpose, an additive tank 65 is provided in which the additive to be sprayed is stored in the stirring device 38. still,
66 is a gate for regulating the new asphalt paving material 53 conveyed through the opening in the side wall of the hopper 60.

At the opening of the side wall of the surge tank 62, as shown in FIG. 9, a second feeder 68 consisting of a bar conveyor is provided on the side of the surge tank 62 by changing the opening area of the opening by a hydraulic cylinder 67.
A weighing gate 69 is provided to adjust the amount of new asphalt paving material 53 to be carried out.

As shown in FIG. 9, the second feeder 68 has a plate-shaped drag pan 70 extending in the longitudinal direction of the vehicle chassis 27 for receiving the new asphalt paving material 52 dropped from the surge tank 62. The drag pan 7
The drag chain 71 that is provided close to above 0 and transports the new asphalt paving material 53 dropped onto the drag pan 70 to the left in the figure is the drag pan 7.
The drive wheel 74 is stretched between a driven wheel 72 rotatably mounted on the chassis 27 above both ends and a drive wheel 74 rotationally driven by a variable motor 73. In addition, the drag pan 70 above the opening of the stirring device 38 has a first distribution gate 75 through which the new asphalt paving material 53 is dropped into the stirring device 38 through this opening.
A movable drag pan 77 is mounted on the distribution gate 75 to open and close the distribution gate 75 using a hydraulic cylinder 76. Further, the rear end portion of the drag pan 70 is bent diagonally downward, and from this bent portion 78, the first screed 45 and the second
A new asphalt paving material 53 is dropped onto the asphalt mixture layer 52 between it and the screw feeder 55. Here, from the surge tank 62, drag pan 7
When the movable drag pan 77 opens the distribution gate 75, the new asphalt paving material 53 is dropped onto the stirring device 38, and when the movable drag pan 77 closes the distribution gate 75, the new asphalt paving material 53 is dropped onto the second screen from the bending part 78. Dropped in front of Euphida 55. Further, the first feeder 62 and the second feeder 71 constitute a single bar conveyor,
The first feeder 63, the surge tank 62, and the second feeder 71 located in front of the distribution gate 75 constitute a conventional conveyance and supply device, and the conveyance and supply device and the second feeder 71 located at the rear of the distribution gate 75 constitute a conventional conveyance and supply device. A second transport supply device is configured. Further, the first screw feeder 45, the first screeds 49a, 49b, the second screw feeder 5
5 and the second screeds 58a and 58b constitute a leveling device.

Note that 79 is a driver's cab that runs the device and controls each of the above-mentioned devices.

Next, the operation of the asphalt pavement regeneration device having such a configuration will be explained.

First, to explain the first construction method, asphalt pavement is heated and softened by a road heater (not shown). After the asphalt pavement that has been heated and softened is moved forward (to the left in FIG. 3) and softened to a predetermined hardness by the heating device 29 of the device, the asphalt surface layer is scraped to a predetermined depth by the cutter device 30 and cut by the cutter device 30. Gather in the center. The collected asphalt mixture is carried into the stirring device 38 and stirred. At this time, the new asphalt paving material 53 in the hopper 60 is introduced into the stirring device 38 through the distribution gate 75 of the drag pan 70 via the first feeder 63, surge tank 62, and second feeder 68, and is mixed with the asphalt mixture 52. The mixed asphalt material is mixed and supplied to the first screw feeder 45. After the mixed asphalt mixture is spread uniformly by the first screed feeder 45, it is compacted to a predetermined hardness by the first screeds 49a and 49b to form a new asphalt pavement layer 80, and will be constructed. Here, when constructing the first construction method, the second screed feeder 55 and the second screed 58a,
58b is pulled upward in the figure, and all of the new asphalt paving material 53 in the hopper 60 is dropped into the stirring device 38 via the distribution gate 75.
New asphalt paving material 53 is not supplied from the bending portion 78 at the rear of 5. Further, the supply amount of the new asphalt paving material 53 to the stirring device 38 is adjusted by adjusting the speed of movement of the drag chain 71 by adjusting the rotation speed of the variable motor 73.

In addition, during construction of the third construction method, the distribution gate 75 of the drag pan 70 is closed by the movable drag pan 77, and only the asphalt mixture scraped by the cutter device 30 is stirred by the stirring device 38, and then the first screw feeder 45 and the asphalt mixture are stirred by the stirring device 38. 1 screed 4
It is evenly spread and compacted using 9a and 49b. A new asphalt paving material 53 is dropped onto the compacted asphalt mixture layer 52 from the bent portion 78 at the rear of the drag pan 70, and this new asphalt paving material layer 81 is passed through the second screw feeder 55 and the second screed 58a. , 58b, the compacted new asphalt pavement layer 80 is formed by uniformly leveling the asphalt mixture layer 52.

Furthermore, during construction of the second construction method, the first feeder 63
Then, the operation of the rear second feeder 68 is stopped to stop the conveyance and supply of the new asphalt paving material 53, and the asphalt mixture scraped by the cutter device 30 is stirred by the stirring device 38, and then the first screw feeder 45 is moved. and first screed 49a, 4
9b, the compacted new asphalt pavement layer 80 is formed by uniformly leveling it. Selection and switching of such construction methods is performed using an operation panel (not shown) on the driver's cab 79. In addition, the heating temperature for asphalt pavement is approximately 100~
Approximately 130℃ is optimal.

In this way, this device allows construction by selectively switching between the first to third construction methods, so that asphalt pavement can be regenerated and repaired quickly depending on the degree of deformation or aging of the asphalt pavement using one device. , it is possible to improve the work efficiency of remanufacturing and repair and reduce the repair cost. Here, an appropriate amount of the additive in the additive tank 63 is sprayed from the spray nozzle 64 depending on the aging of the asphalt mixture.

In the above embodiment, the rear part of the second feeder 63 that conveys and supplies the new asphalt paving material 53 to the stirring device 38 is extended to supply the new asphalt paving material 53 to the front of the second screw feeder 55. However, the stirring device 38 and the means for conveying the new asphalt paving material 53 supplied in front of the second screw feeder 55 may be formed separately.

Further, after the asphalt mixture discharged from the stirring device 38 is leveled by the first screw feeder 45, a new asphalt paving material 53 is dropped onto this asphalt mixture layer, and the second screw feeder 55 and It may be leveled and compacted using the second screeds 58a, 58b, in which case the first screeds 49a, 49b may not be provided. Also,
If the asphalt mixture discharged from the stirring device 38 is uniformly leveled, the first screw feeder 45 and the first screeds 49a and 49b may not be provided.

Further, a heating device may be provided behind the cutter device 30 to heat the scraped asphalt mixture, or the asphalt pavement may be heated by a road heater without providing the heating device 29.

A rolling roller may be provided at the rear of the leveling device, or a road roller may be provided at the rear of the device.

Furthermore, the bent portion 78 may be a second distribution gate that can be opened and closed.

As explained above, the present invention is equipped with a second conveying and supplying device that conveys and supplies the new asphalt pavement material onto the pavement layer discharged from the stirring device.
By combining this conveyance and supply device with a conventional conveyance and supply device and selectively switching operations, the first to third construction methods, etc. can be performed with one regeneration device, and a device with multiple functions can be provided with one device. As a result, it is possible to improve the efficiency of recycling and repair work and reduce repair costs.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a conventional asphalt pavement layer regeneration and finishing device; Figs. 2 A to C are schematic views showing the asphalt pavement construction method; Fig. 3 is a side view showing an embodiment of the present invention; The figure is an enlarged view of part A in Figure 3.
Fig. 5 is a plan view of Fig. 4, Fig. 6 is an enlarged view of section B in Fig. 3, Fig. 7 is a plan view of Fig. 6, and Fig. 8 is a plan view of section B of Fig. 3.
FIG. 9 is an enlarged view of the second conveyor shown in FIG. 3. 27... Vehicle chassis, 29... Heating device, 30... Cutting device, 38... Stirring device, 45... First screw feeder, 49a, 49b... First screed, 53... New asphalt paving material, 55...
...Second screw feeder, 58a, 58b...
Second screed, 63...First feeder, 68...
...Second feeder, 70...Drag pan, 71...
Drag chain, 75...first distribution gate, 7
7...Movable drag pan, 78...Bending portion, 80...
...New asphalt pavement layer.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A scraping device that scrapes heated conventional asphalt pavement to a predetermined depth, and a stirring device that stirs the old asphalt mixture loosened by the scraping device; A conveying and supplying device capable of conveying and supplying new asphalt paving material to the stirring device, and a conveying and supplying device installed behind the stirring device to spread asphalt paving material mixed with the old asphalt mixture or the new asphalt paving material at a predetermined height. In a self-propelled asphalt pavement regeneration device comprising at least a leveling device and equipped with a self-propelled vehicle platform, the asphalt pavement material is conveyed and supplied to the front of the leveling device. 1. A self-propelled asphalt pavement regeneration device, comprising: a conveyance and supply device; and a configuration in which the conveyance and supply device and the second conveyance and supply device are selectively activated or stopped. (2) The conveyance and supply device and the second conveyance and supply device are a single bar conveyor that conveys the new asphalt paving material supplied from the hopper, and a first conveyor that can be opened and closed to supply the new asphalt paving material to the stirring device. A self-propelled asphalt pavement regeneration device according to claim 1, which is characterized by comprising a distribution gate and a second distribution gate for supplying new asphalt pavement material in front of the leveling device. . (3) The conveying and feeding device is a first bar conveyor that feeds the new asphalt paving material introduced from the hopper to the stirring device from the first distribution gate that can be opened and closed, and the second conveying and feeding device feeds the new asphalt paving material from the hopper to the stirring device. The new asphalt paving material introduced into the second
The self-propelled asphalt pavement regeneration apparatus according to claim 1, which is a second bar conveyor that supplies the asphalt pavement from the distribution gate to the front of the leveling apparatus.