JP3548129B2 - Asphalt spread apparatus and asphalt spread method - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a leveling apparatus and a leveling method for leveling an asphalt mixture on a construction surface, and in particular, using a leveling apparatus for leveling a single layer of asphalt mixture, as necessary. The present invention relates to an asphalt leveling apparatus and an asphalt leveling method capable of leveling a plurality of layers.
[0002]
[Prior art]
A conventional leveling machine (that is, a finisher) used for leveling work on asphalt pavement is a self-propelled vehicle equipped with a hopper, a bar feeder, a spreader, and a screed. The pavement is formed from behind the vehicle as it moves on the construction surface.
[0003]
In the leveling work, the paving material is supplied into the hopper from the dump truck arranged in front of the finisher, the paving material is discharged on the construction surface via the bar feeder, and the paving material discharged on the construction surface is discharged. It is carried out in a process of being conveyed in the traveling direction left and right directions by a screw type spreader, and pressing the spread paving material by a screed.
[0004]
On the other hand, on asphalt pavement, multiple pavement materials are spread in layers for the purpose of improving road surface properties such as drainage and soundproofing, and the same pavement material is used for the purpose of improving compaction of thick pavement. There is a technique that spreads it in separate times.
In such a multi-layered asphalt pavement, if the aggregate protruding from the pavement surface is dragged by the screed, the pavement surface is damaged, so that in order to prevent such a situation or to enhance interlayer bonding, uncured at high temperature. It is necessary to spread the upper layer on the lower layer of the state.
[0005]
For this reason, the technique of leveling the upper layer immediately after leveling the lower layer (hereinafter referred to as “multi-layer simultaneous pavement”) is important, but for simultaneous multi-layer pavement, a dedicated machine for multiple layer simultaneous pavement is used. And a method using a plurality of conventional leveling machines.
[0006]
[Problems to be solved by the invention]
However, since the dedicated machine is used less frequently than the conventional single-layer flattening machine, the funds required for introducing the machine may not be collected.
When using more than one conventional leveling machine to perform leveling work for each layer, the upper leveling machine must be located immediately after the lower leveling machine. It is not suitable when there is no arrangement space (side road, etc.) for a device (dump truck, feeder, etc.) for supplying pavement material to (upper layer flattening machine).
[0007]
Also, since it takes time for the machine to pass from the lower layer to the upper layer to the upper layer, the temperature of the lower layer paving material decreases, the bondability with the upper layer deteriorates, and the More workers require more workers.
Therefore, the present invention is based on the fact that a single-layer pavement is performed using the asphalt single-layer leveling base apparatus, but when it is necessary to perform simultaneous pavement of a plurality of layers, the leveling is performed. By configuring the asphalt leveling device for simultaneous pavement by detachably attaching the attached leveling device to the base device, it is possible to reduce the cost by versatility, and to minimize the single layer and The purpose is to perform multiple layers of various asphalt pavements.
[0008]
[Means for solving the problem]
The asphalt spreading device according to claim 1 stores a base hopper device that stores the first pavement material and discharges it onto the construction surface, an attached hopper device that stores the second pavement material and discharges the second pavement material onto the construction surface, A base screed to level the first or second pavement material,First paving materialLeveling included screed, and includingAttached to the leveling base device configured to include the base hopper device and the base screed and detachably attached to the leveling device configured to include the attached hopper device and the attached screed. The base screed is connected to a main body of the flattening base device via a detachable base leveling arm, and the base leveling arm is attached when the attached flattening device is mounted. , The base screed and the main body are connected by an alternative leveling arm having an arm portion longer than the base leveling arm, and the attached screed is disposed in front of the base screed.It is characterized by the following.
[0009]
The auxiliary hopper device of the asphalt spreading apparatus according to claim 2, wherein the auxiliary hopper for storing a second pavement material and the second pavement material discharged from the auxiliary hopper are conveyed and discharged onto a construction surface. And an auxiliary feeder that is configured to be mounted on the main body of the flattening base device.Features.
[0011]
The asphalt spreading method according to claim 3,An asphalt leveling device configured by detachably attaching an auxiliary leveling device configured to include an auxiliary hopper device and an auxiliary screed to a leveling base device configured to include a base hopper device and a base screed. A method of asphalt spreading using the method, wherein the asphalt spreading device is removed by using the leveling base device, and the first paving material is stored in a base hopper device and discharged onto a construction surface. A method for leveling a single layer, wherein the first pavement is leveled with the base screed;So that the attached screed is located in front of the base screedWith the attached leveling device attached to the spread base device, a first pavement material is stored in the base hopper device and discharged onto a construction surface, and the first pavement material is leveled by the attached screed. The first paving material and the second paving material are stored in the attached hopper device, and are discharged onto the first paving material leveled in the first spreading process, and the discharged second paving material is discharged. A second leveling step of leveling the second pavement material with the base screed;
[0012]
Function and effect of the present invention
The asphalt spreading device according to the first aspect is configured by detachably attaching an attached hopper device and an attached screed to a spreading base device for single layer spreading.
The “hopper device” refers to a device that stores pavement material and supplies it to a predetermined portion on a construction surface, and includes at least a pavement material storage tank (that is, a hopper). In this case, in the base hopper device, the base hopper of the flattening base device was removed, and an alternative hopper or a hopper having two storage tanks (that is, an alternative hopper and a hopper for the second paving material) could be attached. It may be something.
[0013]
In the state of only the spread base device, the paving material supplied to the base hopper device is discharged to a predetermined position on the construction surface, and the spread of a single layer is performed by a spread process of pressing it with a base screed. it can.
Attaching the accessory leveling device including the accessory hopper device and the accessory screed to the leveling base device enables leveling of a plurality of layers. In this case, place the attached screed in front of the base screed.Because I installedLower layer by attached screedIt will be leveled.
[0015]
A single unit for multi-layer leveling was constructed by freely attaching and detaching the attached leveling device to the leveling base device, so the upper layer was leveled on the high-temperature, uncured lower surface immediately after leveling. It is possible to improve the interlayer bonding. Further, when the upper layer is pressed, the lower layer is pressed again, so that the compaction property is also improved.
Also, when leveling the upper layer with the last screed, the aggregate in the upper layer pavement material can be pushed down to a part of the lower layer, so even when the upper layer pavement thickness is thin, it can be applied to the upper layer surface. No aggregate dragging occurs.
[0016]
It is necessary to introduce a special-purpose machine that is used less frequently, because it is possible to form an asphalt leveling device with a function comparable to that of a special-purpose machine simply by attaching an attached leveling device to a conventional leveling machine (that is, a leveling base device). There is no economic.
In addition, since it can of course be used as a flattening base device for flattening a single layer, the cost can be reduced by generalization, and the operating rate of the owning flattening machine can be improved.
Further, the base screed is connected to the main body of the flattening base device via a detachable base leveling arm. The present asphalt leveling device is configured by replacing the base leveling arm with a long alternative leveling arm when attaching the accessory leveling device, and attaching the accessory screed in front of the base screed device.
Since the base screed is located behind the attached screed, even if the attached screed is a device having a simple structure, the surface of the pavement (that is, the surface of the upper layer) is almost the same as the leveling of a single layer. The quality is guaranteed.
[0017]
In the asphalt spreading device according to the second aspect, since the attached hopper device is configured to include the hopper and the feeder and can be placed on the spread base device main body, the attachment and detachment of the attached hopper device is facilitated.
When a conventional single leveling apparatus (existing asphalt finisher or the like) is used as the base leveling apparatus, the asphalt leveling apparatus of the present invention can be configured with almost no modification.
[0019]
The asphalt spreading method according to claim 3,A single-layer leveling operation using only the leveling base device and a multi-layer leveling operation performed by attaching an attached leveling device to the leveling base device are selectively performed. A variety of pavement methods can be performed by attaching and detaching the attached leveling device to and from the leveling base device, so that the cost can be reduced by generalization, and the leveling machine owned can be effectively used.
[0020]
Also, multiple layersWhen leveling, connect the base screed and the attached screedRearrange,Place the included screed in front of the base screedPlace,The first pavement material is leveled by the base hopper device and the attached screed, and the second pavement material is leveled by the attached hopper device and the base screed.
[0021]
Since the base screed spreads the second paving material (that is, the paving material for the upper layer), even if the attached screed has a simple structure, the upper layer surface has a single layer leveling. The same level of quality is guaranteed.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
An asphalt leveling apparatus 1 according to a first embodiment of the present invention shown in FIG. 1 has an attached leveling apparatus attached to a leveling base apparatus 10 for single-layer leveling as shown in FIG. . The attached leveling device is constituted by an attached hopper device 20, an attached spreader device 30, and an attached screed device 40.
[0023]
The flooring base device 10 includes a base hopper 12, a bar feeder 13, a base spreader 14, and a base screed 15 on a vehicle body 11 provided with an operating device 11a, a traveling device 11b, a power unit 11c, and the like. They are mounted in this order. A base hopper device is configured by the base hopper 12, the bar feeder 13, the base spreader 14, and the like.
[0024]
The base hopper 12 is configured to store a pavement material such as asphalt mixture and discharge the pavement material from a discharge port formed at the bottom, and is removable. At the bottom of the base hopper, bolts or bolt holes are provided for attaching to and detaching from the vehicle body.
The bar feeder 13 is arranged below the base hopper 12, configured to transport the pavement material on the drag pan from the front to the back by a bar, and discharge the pavement material onto the construction surface at the rear end.
[0025]
The base spreader 14 is mounted on the rear of the vehicle body via the mounting frame 14a so that the screw is located behind the bar feeder 13, and the pavement material is fixed by a screw whose main shaft extends in the left and right direction of the vehicle body. It is transported in both left and right directions and spread over the entire pavement width. If the base hopper 12 or the bar feeder 13 discharges the pavement material over the entire pavement width, the base spreader 14 is not necessarily required.
[0026]
A base screed 15 located at the rear end of the spread base device 10 is pulled by a pair of left and right leveling arms 16 extending rearward from the center of the vehicle body, and the screed surface is maintained so that the pavement thickness is maintained. The pavement material is pressed by the load while the height is adjusted. The height of the screed surface is adjusted via the leveling arm 16 as follows.
[0027]
When the vehicle body 11 tilts or moves up and down, the vehicle height fluctuation is sensed by a sensor, a pivot, or the like, and a telescopic device (for example, a cylinder device, a spring device, or the like, not shown) is operated according to the degree of the vehicle height fluctuation. Activate to move the base end 16a of each leveling arm 16 up and down. Further, the rear part of the leveling arm 16 can be lifted by the telescopic device 17 at the rear part of the vehicle body.
[0028]
Thus, by adjusting the towing position of the leveling arm 16 with respect to the base screed 15 and the supporting height, the height and horizontality of the screed surface from the construction surface are maintained within a predetermined range, and the pavement thickness is kept constant. can do.
Inside the vehicle body 11, two cylindrical screw brackets 11d are provided side by side from the front to the rear. Both ends of the screw bracket 11d are open, and a rear end opening is configured to fit into a bracket 31 of an attached spreader device 30 described later.
[0029]
The attached hopper device 20 removes the base hopper 12 of the flattening base device 10 and attaches it to the removed portion. The first hopper 21 stores the lower layer paving material and the second hopper 21 stores the upper layer paving material. And two hoppers 22. Note that the bottom shape of the hopper device 20 of the attached flattening device (that is, the shape of the vehicle body attaching means such as a bolt hole and the shape of the discharge port) matches the bottom shape of the removed base hopper 12.
[0030]
The first hopper 21 has a discharge port at the bottom, and is attached to the front half of the portion from which the base hopper 12 has been removed such that the discharge port is located above the bar feeder 13.
The second hopper 22 at the rear position of the first hopper 21 has two outlets 22a on the rear side, and the outlets 22a are fitted into the front end openings 11e of the two screw brackets 11d of the vehicle body 11, respectively. Mounted to fit.
[0031]
Attachment of the attached hopper device 20 to the vehicle body 11 is performed by first attaching a flange around the discharge port 22a of the second hopper 22 to the screw bracket 11d of the vehicle body 11, and then, in the attached hopper device 20, receiving the load of the pavement material. Is mounted on the position where the base hopper 12 is removed, and is fixed by a plurality of pins (not shown).
The attached spreader device 30 includes a bracket 31, a screw feeder 32, an auxiliary power unit 33, a telescopic device 34, and the like.
[0032]
The bracket 31 is a tubular body having both ends opened, and is fitted to the screw bracket 11d of the flattening base device 10 at the front end opening 31a. Flanges are formed in the openings of both brackets 31 and 11d, and the attached spreader device 30 is attached to the vehicle body 11 by fixing these flanges with bolts.
[0033]
A screw feeder 32 is inserted into the bracket 31 so as to protrude forward from the front end opening 31a. The screw feeder 32 has a structure in which blades are screwed on a long main shaft. The screw feeder 32 is inserted through a screw bracket 11 d of the vehicle body 11, and is inserted into the second hopper 22 from the outlet 22 a. In other words, the paving material in the second hopper 22 is configured to pass through the screw bracket 11d of the vehicle body 11 and the bracket 31 of the spreader portion, and is discharged from the other end opening 31b onto the construction surface.
[0034]
An auxiliary power unit 33 and a telescopic device 34 are mounted on these two brackets 31, and also function as holding members for the auxiliary power unit 33, the telescopic device 34, and the spreader 35.
A screw-type spreader 35 having a main shaft extending in the left-right direction in the traveling direction is mounted below the bracket 31.
[0035]
The attached screed device 40 includes a leveling arm 41 and an attached screed 42, and is detachably attached to the vehicle body 11 of the flattening base device 10 via an attachment portion 43. In this case, bolt holes are formed in predetermined portions of the vehicle body side surface, the mounting plate and the leveling arm base end portion 41a, and the leveling arm base end portion 41a is interposed between the vehicle body side surface and the mounting plate, and Insert bolts and fix with nuts.
[0036]
The leveling arm 41 is also connected to the extension device 34 of the attached spreader device 30 and is moved up and down by the operation of the extension device 34.
An asphalt spreading method using the asphalt spreading device 1 will be described.
When the single asphalt layer is spread on the roadbed 2, the paving material is supplied to the base hopper 12 by the spreading base device 10, and the paving material is discharged onto the roadbed 2 through the bar feeder 13 and discharged. The spread pavement material is spread over the entire pavement width by the base spreader 14 and pressed by the base screed 15.
[0037]
In the case of simultaneous pavement with multiple layers, the base hopper 12 of the flattening base device 10 is removed, the attached hopper device 20 is attached to the site, the attached spreader device 30 and the attached screed device 40 are attached, and the following steps are performed. .
First, the paving material 3 ′ for the lower layer is supplied to the first hopper 21, and the paving material 4 ′ for the upper layer is supplied to the second hopper 22.
[0038]
The pavement material 3 ′ stored in the first hopper 21 is discharged onto the roadbed 2 via the bar feeder 13, the discharged pavement material 3 ′ is spread and spread by the base spreader 14, and the spread pavement material is spread. 3 ′ is pressed by the base screed 15 (first spreading step). Thereby, the lower layer 3 is formed.
The pavement material 4 ′ stored in the second hopper 22 is conveyed backward by the screw feeder 32 and is discharged onto the lower layer 3 from the rear end opening 31 b of the bracket 31. The pavement material 4 'discharged onto the lower layer 3 is spread and spread over the entire pavement width by the spreader 35, and is pressed by the attached screed 42 (second spreading step). Thereby, the upper layer 4 is formed.
[0039]
Rolling is performed on the spread pavement material (on the upper layer 4 in the case of a multi-layer spread) with a roller or the like, and the pavement material is compacted. This completes the asphalt pavement.
Since the asphalt leveling device is constituted by the leveling base device and the accessory device, the leveling of a single layer and the leveling of a plurality of layers simultaneously can be selectively performed. Therefore, the cost can be reduced by generalization, and the operating rate of the owned leveling machine can be improved.
[0040]
When the flooring base device is possessed, simultaneous installation of a plurality of layers becomes possible by introducing only the accessory device, so that capital investment can be minimized.
In the case of simultaneous multi-layer leveling, the upper layer 4 is formed by the attached leveling device attached to the leveling base device 10, so that the lower layer 3 is uncured at a high temperature immediately after leveling. The upper layer 4 can be leveled, and the interlayer bonding property is better than when a plurality of leveling base devices are used and leveled. Further, when the upper layer 4 is pressed, the lower layer 3 is pressed again by the attached screed device 40, so that the compacting property is also improved. When a large aggregate is mixed in the paving material 4 ′ of the upper layer 4, the aggregate is pushed into the lower layer 3 by the attached screed 42, so that the aggregate may protrude from the surface of the upper layer 4. No high quality pavement surface is formed.
[0041]
In particular, for thin-layer pavement, the surface of the pavement is damaged by dragging the aggregate, the temperature of the pavement material is remarkably reduced, so that the interlayer bonding is poor, and sufficient density cannot be obtained even by compaction. However, such inconvenience is resolved.
In the method of flattening a plurality of layers according to the present embodiment, the upper layer paving material 3 'and the lower layer paving material 4' may be made of the same mixture. In particular, in the case of a thick pavement having a pavement thickness of about 10 to 30 cm, there were inconveniences such as that the components in the pavement material were uneven in the upper layer and the lower layer, and that the compactability of the lower layer was weak. Is divided into a plurality of times to eliminate the inconvenience.
[0042]
In this case, the first hopper and the second hopper may be formed in one tank, and two outlets for the lower layer and the upper layer may be provided at the bottom and the rear side of the tank.
In addition, three or more layers can be leveled simultaneously by attaching multiple attached leveling devices, and a single-layer leveling method or a multiple-layer leveling method can be selectively used depending on the construction site. Then, various leveling will be possible.
[0043]
In the present invention, the attached leveling device may be a single unit. In this case, a configuration in which a frame in which a hopper, a spreader, and a screed are attached is attached to the front or rear of the leveling base device.
The asphalt leveling device 1 'according to the second embodiment of the present invention shown in FIG. 3 is similar to the asphalt leveling device 1 according to the first embodiment, and is attached to a leveling base device 10' for single-layer leveling. It has a flattening device. In this case, the attached leveling device is configured to include the attached hopper device 50 and the attached screed device 60.
[0044]
The flattening base device 10 ′ has an internal structure of the vehicle body 11 ′ (that is, a point where a screw bracket is not provided, a point where no expansion device is provided), and an expansion device 18 is provided on both sides of the vehicle body. Except that the leveling arm (that is, a base leveling arm not shown) is replaceable and that a connecting member 19 for connecting the extendable device 18 and the leveling arm is present. The configuration is substantially the same as that of the flattening base device 10 of the embodiment.
[0045]
A power unit is arranged inside the vehicle body 11 'of the leveling base device 10'.
The telescopic devices 18 provided on both sides of the vehicle body include a hydraulic cylinder and a piston rod 18a, and are configured so that the piston rod 18a expands and contracts according to the inclination or vertical movement of the vehicle body 11 '. .
[0046]
A connecting member 19 for connecting the leveling arm is pivotably supported at the tip of the piston rod 18a. The leveling arm is detachable, and is attached to the vehicle body via the connecting member 19 at the base end and to the base screed 15 'at the rear end.
As shown in FIG. 4, the attachment leveling devices 50 and 60 are attached to the leveling base device 10 'as shown in FIG. 4. At this time, the base hopper 12' is replaced with the alternative hopper 70, and the leveling arm is replaced with the alternative leveling arm. 80 and a base spreader (not shown) is removed.
[0047]
The alternative hopper 70 has the same bottom shape as the removed base hopper 12 '(i.e., the shape of the discharge port 71 and the vehicle body attaching means), and has a receiving port 72 that protrudes greatly toward the front of the vehicle body.
The alternative leveling arm 80 has an arm portion 81 that is longer than the leveling arm of the leveling base device 10 '. At the base end portion 82, it is connected to the extension device 18 via the connecting member 19, and has a screed mounting portion 83 at the rear end portion.
[0048]
The base screed 15 'is displaced rearward by replacing with the long alternative leveling arm 80 of the arm portion 81, and a space for disposing the attached screed device 60 is secured between the rear end of the vehicle body and the base screed 15'.
The attached hopper device 50 includes an attached hopper 51 serving as a pavement material storage tank, and an attached feeder 52 for transporting the pavement material to a predetermined spread area on the construction surface. That is, it is placed at a position behind the receiving port 72 of the alternative hopper 70, and is fixedly attached by bolts, nuts, pins, or the like.
[0049]
At the bottom of the attached hopper 51, as shown in FIG. 4A or 4B, two discharge grooves 51a extending in the vehicle length direction are opened. A bucket 51c is pivotally supported on the side of each discharge groove 51a by a pivot 51b along one side edge of the discharge groove 51a.
The bucket 51c is swung about the rotation support shaft 51b in the bottom inclined direction (that is, the A direction in the drawing) so that all the pavement material in the bucket is discharged.
[0050]
An attached feeder 52 is provided below the discharge groove 51a.
The accessory feeder 52 is inserted into the bracket 53 and extends to the position of a discharge chute 55 formed at the rear end of the bracket 53. The rotation of the screw 54 causes the paving material in the accessory hopper to move backward from the vehicle body. And discharged from the discharge chute 55.
[0051]
The bracket 53 extends horizontally from the vicinity of the front end of the attached hopper 51 toward the rear of the vehicle body, and has a gutter shape at the hopper portion and a tubular shape outside the hopper (that is, behind the attached hopper 51).
The attached screed device 60 has a first spreader 62, a simple screed 63, and a second spreader 64 attached to a frame body 61 in this order, and a portion where the base spreader of the flattening base device 10 'is removed (that is, the vehicle body). (Rear end) via two mounting members 65.
[0052]
Each of the first spreader 62 and the second spreader 64 has a screw 62a, 64a having a length corresponding to the construction width, and the pavement material is transported in both the left and right directions by the screw 62a, 64a.
The simple screed 63 is arranged in parallel with the screws 62a and 64a, and is configured to press the pavement material by the load. In addition, it has the extension part 63a which can be extended in the vehicle traveling direction left-right direction, and is comprised so that length can be changed according to construction width.
[0053]
The first spreader 62, the simple screed 63, and the second spreader 64 have their own height adjusting means 62b, 63b, 64b, and are fixed to the frame 61 with their positions adjusted. The frame 61 is connected at two locations at the rear end of the vehicle body 11 ′ via two attachment members 65, and is provided by a telescopic device 66 provided on each attachment member 65 by a parallel link mechanism. It is raised and lowered.
[0054]
In this case, the mounting member 65 has mounting means (that is, bolt holes and the like) having the same configuration as the removed base spreader.
A spreading method using the asphalt spreading device 1 'will be described.
The leveling of the single layer is performed by the leveling base device as in the first embodiment.
For leveling of multiple layers, the leveling base device 10 'is disassembled into the state shown in FIG. 5, the alternative hopper 70 is mounted, the alternative leveling arm 80 is mounted, and the screed 15' of the leveling base device is mounted at the rear end. After attaching the attached hopper device 50 and the attached screet device 60, the following steps are performed.
[0055]
First, the lower layer paving material is supplied to the alternative hopper 70 and the upper layer paving material is supplied to the hopper 51 of the attached hopper device 50.
Then, the pavement material discharged from the alternative hopper 70 is discharged onto the roadbed through the bar feeder 13 ′, spread by the first spreader 62, and pressed by the simple screed 63 (first spreading step). Do.
[0056]
The pavement material discharged from the hopper 51 of the attached hopper device 50 is conveyed to the rear of the vehicle body (that is, behind the simple screed 63) by the attached feeder 52, and is discharged from the discharge chute 55 onto the construction surface. In this case, the length of the attached feeder 52 and the position of the attached screed device 60 are adjusted so that the paving material is supplied from above the second spreader 64 or the paving material is supplied in front of the second spreader. Have been.
[0057]
The paving material supplied from the discharge chute 55 onto the construction surface (that is, on the lower layer) is spread over the entire construction width by the second spreader 64, and is pressed from above by the base screed 15 '(second flattening). Process).
In the present embodiment, the final (ie, upper layer) leveling operation is performed by the base screed 15 ′ having an advanced position adjusting function / pressing function. Therefore, even if the attached screed for the lower layer is a simple device, A high quality flat surface can be formed.
[0058]
In addition, since the hopper device is configured to be mountable on the vehicle body, there is almost no need to modify the conventional flat-laying base device for single-layer flattening, and the attached device can be easily attached to the flattening base device. Can be. This makes it easier to selectively construct a single layer and a plurality of layers simultaneously.
[Brief description of the drawings]
FIG. 1 is a side view showing a flattening apparatus according to a first embodiment of the present invention.
FIG. 2 is an explanatory view showing a state in which an attached leveling device is attached to a leveling base device of the leveling device.
FIG. 3 is a side view showing a spreading apparatus according to a second embodiment of the present invention.
4A and 4B show the spreading device, wherein FIG. 4A is a plan view and FIG. 4B is a cross-sectional view taken along line B-B ′.
FIG. 5 is an explanatory view showing a state in which an attached leveling device is attached to a leveling base device of the leveling device.
[Explanation of symbols]
1, 1 '... asphalt spreading device
2. Roadbed (construction surface)
3: Lower layer (construction surface)
3 ': Paving material (first paving material)
4: Upper layer
4 ': Paving material (second paving material)
10, 10 '... matting base device
11, 11 '... body (body leveling device)
12, 12 '... base hopper
15, 15 ': base screed
20… Attached hopper device
42… Screed included
50 ... Attached hopper device
51… Attached hopper
52… Attached feeder
63… Simple screed
80… Alternative leveling arm

Claims (3)

A base hopper device for storing the first pavement material and discharging it onto the construction surface;
An attached hopper device for storing the second pavement material and discharging it onto the construction surface;
A base screed for leveling the discharged first or second paving material;
An attached screed for leveling the discharged first paving material ;
And attaching and detaching an attached leveling device including the attached hopper device and the attached screed to and from a leveling base device including the base hopper device and the base screed. An asphalt leveling device installed as possible,
The base screed is connected to a main body of the flattening base device via a detachable base leveling arm,
When attaching the accessory leveling device, the base leveling arm is removed, the base screed and the main body are connected by an alternative leveling arm having an arm portion longer than the base leveling arm, and the accessory screed is connected to the base screed. An asphalt leveling device, which is disposed in front of the asphalt. The attached hopper device,
An auxiliary hopper that stores a second pavement material, and an auxiliary feeder that conveys the second pavement material discharged from the auxiliary hopper and discharges the second pavement material onto a construction surface,
The asphalt spreading device according to claim 1, wherein the asphalt spreading device is configured to be mountable on a main body of the spreading base device. An asphalt leveling device configured by detachably attaching an auxiliary leveling device configured including an attached hopper device and an auxiliary screed to a leveling base device configured including a base hopper device and a base screed. An asphalt spreading method performed by using,
The first paving material is stored in a base hopper device and discharged onto a work surface, and the first paving material is removed by the base screed. Flattening method of single layer,
In a state in which the attached leveling device is attached to the spread base device so that the attached screed is disposed in front of the base screed, the first pavement material is stored in the base hopper device and placed on a construction surface. Discharging, leveling the first pavement material with the attached screed, and storing the second pavement material in the attached hopper device, and disposing the second pavement material in the first leveling process. Discharging a second pavement material onto the first pavement material and leveling the discharged second pavement material with the base screed;
Is carried out selectively.

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