JPH0674565B2 - Asphalt waste material recycling equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for heating and melting and regenerating asphalt waste material, in particular, while injecting the flame from a burner device into a horizontally long rotary drum, the asphalt waste material is charged therein. The present invention relates to an asphalt waste material recycling device that melts while stirring with its rotation, passes through a roster in a rotating drum, and then discharges.

[0002]

2. Description of the Related Art Conventionally, as an asphalt waste material recycling apparatus of this type, as disclosed in JP-A-61-21204, asphalt waste material that has passed through a rostrum is
Immediate discharges have already been provided by discharge bodies with screws.

[0003] Further, since the asphalt waste material that has passed through the rustle contains a large amount of stone blocks and the like used for paving, it is also provided that the asphalt is sieved from the regenerated asphalt with a trommel.

[0004]

The object of the present invention is to make it possible to melt the asphalt waste material even in the trommel, and to accurately remove the stone blocks and the asphalt adhering thereto and the trommel. It is to be able to efficiently perform the sieving.

[0005]

In order to achieve such an object, according to the present invention, at the rear end portion of the inner circumference of the trommel, the inlet is opened toward the center of the trommel and the outlet is opened at the outer circumference of the trommel. It is characterized by the provision of a basket-shaped scoop net.

[0006]

Therefore, the asphalt waste material that has passed through the rustle enters into the rotating cylindrical trommel, the undersized ones fall from their eyes, and the oversized ones such as stone blocks are captured by the scoop net. Then, the oversized product is repeatedly floated in the scoop net with the rotation of the trommel to forcibly remove the asphalt, and then automatically discharged from the outlet of the scoop net.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIG. 1 (side view), FIG. 2 (front view), FIG. 3 (rear view) and FIG. 4 (perspective view), the entire asphalt waste material recycling apparatus is installed on the machine base 1 and installed on the ground. It is used in a loaded condition or mounted on a truck bed.

On the machine base 1, a horizontally long rotary drum 2 is horizontally supported as will be described later, and a hopper 4 is installed on the front side of the rotary drum 2 by a column 3. The rotary drum 2 is covered by a dome-shaped drum cover 2a installed on the machine base 1 with a constant gap. At the center of the lower side of the hopper 4, a charging shooter 5 is integrally connected, and the charging shooter 5 is inclined downward toward the front surface of the rotary drum 2, and a lower end opening 5a is formed on the front cover plate 6 of the rotary drum 2. It is projected into the rotary drum 2 from the charging port 7 provided. In order to prevent the heat in the rotating drum 2 from escaping from the charging port 7, in the charging portion of the rotating drum 2, that is, in the lower end opening 5a of the charging shooter 5, front and rear heat insulation curtains are formed by a plurality of parallel chains 8. 9 and 10 are swingably suspended, and the asphalt waste material thrown into the hopper 4 passes through the heat insulating curtains 9 and 10 at the front and the back of the throwing port 7.
Enters the rotary drum 2. Further, at the bottom of the charging shooter 5, a sound insulating layer 12 filled with a sound insulating material 11 is formed in order to insulate heat from the rotating drum 2 and to prevent impact noise caused by the asphalt waste material. The heat insulating curtains 9 and 10 are not limited to chains, and may be, for example, a plurality of metal plates connected by a hinge.

A burner device 13 is provided below the input shooter 5 and on the machine base 1 so as to be able to adjust the front, rear, left and right positions and inclinations as follows. That is, the burner device 1
As shown in FIGS. 2 and 5, 3 adjusts the height and the inclination on the slide table 16 by supporting the front, rear, left and right four positions of the adjustment table 14 on the slide table 16 by the adjustment bolts 15. It is installed as possible. Further, the slide table 16 is attached to the floor plate 18 on the machine base 1 by a plurality of ball wheels 17 attached to the lower surface thereof.
By being able to freely slide on the front, back, left and right, the position of the burner device 13 can be freely adjusted in any of the front, rear, left and right directions. In the burner device 13, as shown in FIG. 5, the spherical flange 19 provided on the outer periphery of the flame injection tip is provided with the spherical ring 21 provided on the edge of the burner port 20 of the front cover plate 6 of the rotary drum 2. By being engaged with, the spherical bearing is received by the burner port 20, and the injection angle of flame into the rotary drum 2 can be freely adjusted in any direction.

After adjusting the burner device 13, the slide table 16 is fixed on the floor plate 18 by the holding plate 22 and the fixing bolts 23. If the fixed state is released and the slide table 16 is slid, the burner device 13 is set to the burner port 2
It can be easily pulled out from 0, so its inspection and cleaning are easy. A nozzle pipe 24 that protrudes into the rotary drum 2 is attached to the tip of the burner device 13, and flame from the burner device 13 is injected into the rotary drum 2 through the nozzle pipe 24. Further, as shown in FIGS. 1 and 2, air is fed from the air supply fan 26 into the rotary drum 2 via the air supply duct 25, and the combustibility in the rotary drum 2 is enhanced.

The rotary drum 2 is provided with a heat insulating coating layer 29 made of a heat insulating material 28 on the outer periphery of its drum body 27. In addition, as shown in FIG. 6, the annular rim 30 insulates the rotary drum 2 at two positions before and after the outer periphery of the drum, so that a large number of plate-shaped ribs 31a and annular ribs 32b form a fixed portion with the drum body 27. It is fixed with a gap. The front and rear rims 30 are mounted and supported by a pair of left and right bearing rollers 33 that are supported by bearings 32 on the machine base 1, and each rim 30 is supported on the machine base 1 at a left-right diagonal position. It is held by the pair of front and rear holding rollers 34. Lubricating oil is circulated and supplied to the bearing portion of the support roller 33.

Therefore, the rotary drum 2 is rotatably supported by the two sets of support rollers 33, and its front-back movement is restricted by the two sets of the sandwiching rollers 34. The rim 30
In order to protect the supporting roller 33 and the nipping roller 34 from high heat by further improving the heat insulating property with the rotating drum 2, the hollow portion 3
5 is formed. Between the outer ring 33a and the inner ring 33b of the support roller 33, in order to make the support roller 33 itself also function as a cooling fan, a large number of blower fins 36 are fixed on both sides, and the sandwiching roller 34 also blows down the blower fins. 37 is provided. This nip roller 34 has its bearing stand 3
The bearings 8 are supported on the machine base 1 in a slightly oblique direction.

A large sprocket wheel 39 is fixed to the front end of the drum body 27 as shown in FIG. Figure 2
The large sprocket wheel 39 and a drum rotation motor (geared motor) 4 installed on the machine base 1 as shown in FIG.
A chain 42 is wound around a small driving sprocket wheel 41 having a small value of 0, and the rotary drum 2 is rotated at a constant speed in a constant direction by the motor 40. The chain 42 is always tensioned by the tensioning roller 43 to which a spring force is applied.

When the rotary drum 2 rotates, the supporting roller 3
3 and the nipping roller 34 are also the ventilation fins 36 and 37 of them.
The roller drum and the rim 30 are cooled while being blown by the air, and the bearing roller 33 and the nipping roller 34 are protected from high heat. Therefore, the rotating drum 2 rotates smoothly, and the bearing roller The life of 33 and the nip roller 34 is also extended.

On the inner peripheral surface of the drum body 27, as shown in FIG. 1, a large number of cone-shaped crushing projections 44, a plurality of bar-shaped guide ribs 45 having a triangular cross-section, and a large number of plate-shaped stirring feed blades. 46 are provided from the front end to the rear end. The large number of crushing projections 41 and the stirring feed blades 46 are arranged so as to spirally form a plurality of spiral rows toward the rear end of the drum body 27 as a whole. The crushing protrusions 44 are fixed toward the center of the drum body 27, and the agitating and feeding blades 46 are fixed while being inclined with respect to the axis of the drum body 27 in the direction opposite to the rotation direction of the rotary drum 2. There is. The plurality of rod-shaped guide ribs 45 are fixed in parallel with the axis of the drum body 27, and the rear ends thereof are inclined in the direction opposite to the rotation direction of the rotary drum 2.

Therefore, the asphalt waste material charged into the rotary drum 2 as described above is crushed by the crushing projections 44 as the rotary drum 2 rotates, and at the same time, by the stirring feed blades 46 and the rod-shaped guide ribs 45. While being stirred and being melted by the flame from the burner device 13,
It is mainly pushed forward by the stirring feed blades 46 along the rod-shaped guide ribs 45, is pushed forward by the crushing projections 44, and is pushed backward by the newly introduced asphalt waste material. If the upper edge of the stirring / feeding blade 46 is formed in a sawtooth shape as shown in FIG. 7 or FIG. 8, the asphalt waste material can be crushed also by this stirring / feeding blade.

At the rear end of the drum main body 27, a rostrut 47 having the following structure is mounted. Lostor 47
As shown in FIGS. 9 and 10, four fan-shaped lattice plates 48 are provided.
Are connected to each other by a joining plate 49 so as to form a quadrangular pyramid that extends in the front side in a ring shape and four pieces are joined together, and a flame-reflective disc 51 with double front and rear is provided in a central circular lack portion 50 surrounded by these lattice plates 48.・ 52 is attached. The grid plate 48 has a large number of grid lines 55 formed by concentric circular arc-shaped ribs 53 and intermediate ribs 54 between them, and these grid lines 55 are wider in the outer peripheral portion than in the inner peripheral portion. It is getting bigger. A large number of prismatic crushing and stirring projections 56 are fixed to the front surface of the arc-shaped rib 53 toward the front side.
Further, auxiliary protrusions 57 and 58 are fixed to the inner peripheral surface of the arc-shaped rib 53 at the inner peripheral edge and the outer peripheral surface of the arc-shaped rib 53 at the outer peripheral edge, respectively, toward the inside and the outside of the arc.

The flame-reflecting disc 52 on the rear side has a conical shape that expands to the front side, and a plurality of spiral flame swirl vanes 59 are radially fixed to the front surface thereof. Front flame reflecting disk 51
Is slightly smaller than the flame-reflecting disc 52 on the rear side, and also has a conical shape that expands to the front side. Then, on the front surface of the flame-reflecting disc 51 on the front side, a plurality of flame-rotating blades 60, which are spiral but have a slightly different shape from the flame-rotating blades 59 on the rear side, are positioned on the rear-side flame-rotating blades 59. They are staggered and fixed radially. Furthermore, the flame-reflecting disk 5 on the front side
A plurality of large openings 61 are radially formed on the inner peripheral portion of the front surface of No. 1, and a large number of smaller openings 62 are radially formed on the outer peripheral portion.

The front flame-reflecting disc 51 is fixed to the front face of the rear flame-reflecting disc 52 via a spacer 63 with the rear flame-reflecting disc 52 at a constant distance. These front and rear double flame reflecting discs 51, 52 are provided on the left and right sides of the rear flame reflecting disc 52 by a hinge 64 inside the circular lack portion 50, that is, one of the joining plates 49. It is pivotally attached so that it can open and close the circular lacking part 50 back and forth, and when it is closed, bolts
It can be held using nuts.

The rostrut 47 having such a structure is rotatably supported on the inner peripheral surface of the drum body 27 by pivots 65 on both upper and lower sides thereof. A pair of left and right stoppers 66 facing each other are fixed to the inner peripheral surface of the drum body 27, and the rostrut 47 is almost in contact with one of these stoppers 66 on the front side and the other side on the rear side. It can be rotated 180 degrees. That is, the front and rear surfaces of the rostrut 47 can be reversed, and normally, the bolts and nuts are fixed to the stoppers 66, and the front face is held as shown in FIG.

Therefore, a part of the flame injected from the burner device 13 collides with the flame reflection disc 51 on the front side and is reflected, and the remaining flame which has passed through the large and small openings 61 and 62 is on the rear side. It is reflected by the flame reflecting disc 52. In this case, since the flame injection direction of the burner device 13 can be changed to any direction as described above, the direction can be adjusted to have good reflectivity and, therefore, the best direction for melting the asphalt waste material. .

The flames reflected by the front and rear flame reflecting discs 51, 52 have flame rotating blades 59, 60 projecting from the front faces of the flame reflecting discs 51, 52, and these rotate together with the rotary drum 2. Moreover, since the flame-reflecting discs 51 and 52 are curved in a conical shape, they are swirled by these, and are vortexed while swirling around the flame that is emitted diagonally forward and is injected almost straight. Backflow.
In this case, since the front and back flame-reflecting discs 51 and 52 maintain a constant interval, the flame that reflects the front flame-reflecting disc 51 and the flame that reflects the rear flame-reflecting disc 52 are the front and rear. The flame that is reflected by the flame-reflecting disc 52 on the rear side follows the flame that is reflected by the flame-reflecting disc 51 on the front side, and flows forward while pushing back the flame that returns to the rear. Moreover, since the front and rear flame swirl vanes 60 and 59 are inconsistent with each other and have different shapes, the swirl flows have two different time lags and flow back, and the flame reflex blades 59 on the front side swirl back flow earlier. When it hits the asphalt waste material or the agitating feed blade 46 and bounces back, the flame swirling and backflowing backward by the flame swirl blade 60 on the rear side pushes it back to the front, and this is repeated.

Therefore, the flame will repeatedly hit the asphalt waste material in the rotating drum 2 while swirling in a wavy manner, and the entire range from the rear end to the front end of the rotating drum 2 will have good heat convection and less heat loss, and average. Since it can be heated, the asphalt waste material can be melted with good heat efficiency and evenly and rapidly, and the regeneration capacity is remarkably improved as compared with the conventional one.

If the flame-turning blades 60 and 59 are provided on both the front and rear flame-reflecting discs 5 and 52 as described above, the flame can be swung on both the front and back flame-reflecting discs 51 and 52. However, it is possible to swirl the front and rear flames even if provided on at least one of them.

The asphalt waste material that has been melted and transferred to the grate 47 as described above is further crushed and agitated by a large number of crushing agitation projections 56 projecting from the front surface of the grate 47, and its grids 55 are formed.
Pass through. In this case, the molten asphalt waste material is
Since the roster 47 is in the shape of a quadrangular pyramid, it is smoothly pushed rearward from the periphery of the flame reflecting discs 51 and 52 so as to be radiated in the centrifugal direction.

The rear end of the drum body 27 is shown in FIGS.
As shown in FIG. 5, a cylindrical trommel 67 is attached, and the asphalt waste material that has passed through the roster 47 is screened into undersized ones and oversized ones by the trommel 67 as described later.

The trommel 67 is a plain-woven wire mesh 68.
Is formed into a cylindrical shape by the flanges 69 at the front and rear ends, and the flange 69 at the front end is provided with a plurality of mounting holes 70 as shown in FIG. 11, and the wide portion of the mounting hole 70 is formed as shown in FIG. By engaging with the mounting protrusion 71 protruding from the rear edge of the drum body 27 and slightly rotating the trommel 67, the narrow portion of the mounting hole 70 and the mounting protrusion 71 are engaged. , Trommel 67 is the drum body 2
It is detachably attached to the rear end of 7. Therefore, the trommel 67 having different mesh size can be easily replaced. Note that the attachment may be performed by another method. The trommel 67 is also covered by a dome-shaped trommel cover 67a installed on the machine base 1 with a certain gap.

Therefore, the trommel 67 rotates integrally with the rotary drum 2 in the trommel cover 67a, and the asphalt waste material passing through the rostrut 47 enters the inside of the trommel 67 and is undersized smaller than the mesh of the wire mesh 68. The (recycled asphalt) passes through the metal net 68 and drops from the molten asphalt discharge port 72 (FIG. 1) provided in the trommel cover 67a below the trommel 67. On the other hand, the oversized one temporarily stays in the trommel 67 and is pushed rearward by the asphalt waste material that successively passes through the roster 47. This oversized one is a stone block that was mainly used for paving, and molten asphalt was attached to it, and if it was discharged from Trommel 67 as it was, it would not be possible to reuse the stone block itself,
The asphalt recovery rate will also decrease. Therefore, the oversized one is trapped as described below and allowed to float in the trommel 67 for a while to remove the adhering molten asphalt and then discharge it.

That is, as shown in FIGS. 13 and 14, a fall prevention fence 89 made of an annular metal net is hung at the rear end of the inner circumference of the trommel 67, and the inside of the fall prevention fence 89 (on the rotary drum 2 side). ), A plurality (3 in the figure) of C
Alternatively, J-shaped basket-shaped scoop nets 90 are provided radially at predetermined intervals in the circumferential direction. The inlet of each scoop net 90 is open toward the center of the trommel 67, and the outlet 91 is open to the outer periphery of the trommel 67.

Therefore, the oversized one of the trommel 67 which does not pass through the wire net 68 receives the rotational force of the trommel 67 and is biased toward the rotational direction side,
It is sent to the rear end of the trommel 67, and is prevented from falling from the rear end of the trommel 67 by the fall prevention fence 89 and is captured by the scoop net 90. Then, as the trommel 67 rotates, it is repeatedly moved in the scoop net 90,
Since the mechanical impact force is generated while being further heated by the heat from the rotary drum 2 during the movement, it is crushed and melted in the scoop net 90, and the molten asphalt attached to the stone blocks is removed during the movement. Further, the stone block from which the molten asphalt has been removed is discharged from the outlet 91, and the oversized discharge port 81 provided in the trommel cover 67a below the rear end of the trommel 67.
(Fig. 1).

When the trommel 67 is clogged, the undersize and the oversize are discharged to the oversize discharge port 81. Therefore, in order to prevent the trommel 67 from being clogged, a scraper 83 is arranged on the outside thereof as follows.

That is, the scraper 83 is formed by suspending a large number of chains 87 in parallel in the axial direction from the front end to the rear end of the outer periphery of the trommel 67 and suspending it from the inner peripheral surface of the drum cover 67a. It is provided at the upper center of the inner peripheral surface and at three locations on the left and right sides. A piece 88 is attached to the lower end of each chain 87 of the scraper 83.

Therefore, when the trommel 67 rotates, it becomes 3
Since the scraper 83 at a certain position is in sliding contact with the outer peripheral surface of the wire net 68, and the chain 87 has a large number of uneven portions, the wire net 6
The eighth eye is repeatedly scratched, and the molten asphalt attached to it is scraped and dropped. In this case, each chain 87
A deformed piece 88 that doubles as a weight is attached to the lower end of the wire. Since the piece 88 floats and taps the outer peripheral surface of the wire net 68 repeatedly, the molten asphalt adhering to the wire net 68 can be removed accurately. Be seen. The scraper 83 is not limited to the chain, and may be, for example, a fork-shaped elastic metal plate.

By the way, the asphalt waste material tends to be biased in the direction of rotation in the rotary drum 2, and there is little asphalt waste material on the opposite side, and the heat flowing from the inside of the rotary drum 2 to the trommel 67 is mainly the opposite. Pass Rostor 47 from the side. Therefore, if the trommel 67 is separated from the rotary drum 2 and rotated in the opposite direction, the oversized one that has passed through the rostr 47 is
In the trommel 67, since it can be deviated to the side opposite to the rotating direction of the rotating drum 2 and allowed to move, it passes through the rostrut 47 from the side opposite to the rotating direction of the rotating drum 2 as described above. It can be effectively heated by heat.

As shown in FIGS. 1, 3 and 4, a circular rear door 92 is attached to the outside of the rear end opening 67b of the trommel cover 67a so as to be openable and closable by upper and lower hinges 93. On the rear end surface of the trommel cover 67a, on the side opposite to the hinge 93, upper and lower cover locks 94 for locking the rear door 92 are mounted. These cover locks 9
4 is a lever 96 fixed to the common shaft 95.
The rear door 92 can be locked and released by operating.

The rear door 92 has a double structure consisting of a conical front plate 97 and a rear plate 98 that spread toward the front side, and forms a hollow portion 99 for heat insulation between them, and these front and rear plates 97. In the center of 98, the chimney connection 1 which is also the main flue
00 is provided. Then, the chimney 101 is flange-connected to the chimney connection port 100, and the chimney connection port 10
A duct 1 forming a substantially annular secondary flue 102 around 0
03 is attached to the rear surface of the rear plate 98 so that the upper end of the duct 103 communicates with the middle of the chimney 101.
A plurality of short exhaust pipes 104 communicating with the front and rear plates 97, 98.
It is pierced radially. At the lower end of the chimney 101,
A disk-shaped damper 105 is mounted so that the opening degree can be adjusted by an outer lever 106.

Therefore, most of the gas generated in the rotary drum 2 is exhausted to the atmosphere from the chimney 101 through the chimney connection port 100, and a part of the gas passes through the plurality of exhaust pipes 104 to form the annular auxiliary flue 102. After entering the chimney 101, it enters the chimney 101 from the middle and mixes with the gas from the chimney connection port 100 to generate a turbulent flow phenomenon, whereby the exhaust gas cleaning action is performed.

Rear opening 67b of the trommel cover 67a
Unlocks the cover lock 94 and opens the rear door 9
By opening 2, it can be opened at any time. Therefore, if the burner device 13 is extinguished to complete the regeneration work, and the rear door 92 is opened when the residual asphalt is still soft, it will adhere to the rear surface of the roster 47, the inner and outer surfaces of the trommel 67, the scoop net 90, the scraper 83, etc. The residual asphalt and the impurities such as stone blocks remaining in the trommel 67 can be easily removed artificially through the rear opening 67b.

Further, by removing the rostrut 47 from the stopper 66 and rotating it and reversing the front and rear surfaces thereof, the residual asphalt adhering to the front surface can be removed, and further the rostrut 47 is rotated by an appropriate angle. By opening the left and right sides of the rotary drum 2, impurities such as asphalt and large stones remaining in the rotary drum 2 can be easily removed by using a scraping rod even if the operator does not enter the rotary drum 2. it can. Furthermore, since the front and rear flame reflection discs 51 and 52 can be opened and closed in the circular lacking portion 50 of the loss 47,
If this is opened to the rear side, the flame-reflecting discs 51.5 before and after these flames will be retained even if the rostrut 47 is held by the stopper 66.
2 and their flame swirl vanes 59, 60 can be cleaned.

The left side or right side of the trommel cover 67a may be opened and closed, or it may be divided into left and right parts so that both left and right parts can be opened and closed. In FIG. 1, reference numeral 107 is a fuel tank, 108 is a control panel, and the control panel 108 is erected on the support column 3 by a hinge 109 so as to be openable and closable, and is installed below the hopper 4 so as not to interfere with the work when not in use. It's open.

[0041]

As described above in detail, according to the asphalt waste material recycling apparatus of the present invention, an asphalt waste material that has entered the trommel from the rotary drum is provided with an oversized one such as a lump of stone at the rear end of the trommel. It can be captured by a scoop net, and as the trommel rotates, the asphalt can be repeatedly moved while melting in the scoop net, so that the asphalt adhering to the lumps of stone can be forcibly removed and the trommel sieving is performed. The efficiency can be improved.

Therefore, the efficiency of reclaiming asphalt can be improved as compared with the conventional method, and stone blocks and the like can be recovered separately from the recycled asphalt, the quality of the recycled asphalt is improved, and the stone blocks are free of asphalt. Can be reused in the state.

If a ring-shaped drop control fence is provided at the rear end of the inner circumference of the trommel as in claim 2, the asphalt residence time in the trommel can be lengthened to facilitate sieving and melting.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view with a part of an embodiment of the present invention omitted.

FIG. 2 is a partially cutaway front view of the above.

FIG. 3 is a rear view of the same.

FIG. 4 is a perspective view of the same.

FIG. 5 is an enlarged cross-sectional view of the burner device and the flame injection portion of the rotary drum in the device.

FIG. 6 is an enlarged perspective view of a support portion of the rotary drum.

FIG. 7 is a side view of another example of the stirring feed blade.

FIG. 8 is a side view of still another example of the stirring feed blade.

FIG. 9 is a partially omitted enlarged front view of a roster.

FIG. 10 is a partially omitted enlarged perspective view seen from the rear of the Rostrul and Trommel.

FIG. 11 is a front view of the flange of the trommel.

FIG. 12 is an enlarged sectional view showing a trommel mounting structure.

FIG. 13 is a rear view of the trommel.

FIG. 14 is a sectional view of the same.

[Explanation of symbols]

 2 Rotating Drums 47 Rostrul 67 Trommel 89 Fall Restriction Bar 90 Scoop Net 91 Scoop Net Exit

Claims (2)

[Claims] 1. A flame from a burner device is injected into a horizontally long rotary drum, and asphalt waste material is charged therein.
As it rotates, it melts while stirring and passes through the rostrul in the rotating drum, then continues to the rear end of the rotating drum, and is a cylindrical mesh trommel that rotates integrally with or separately from it. In the asphalt waste material reclaiming device for sieving the same as above, a basket-like scoop net having an inlet opening toward the center of the trommel and an outlet opening at the outer periphery of the trommel is provided at the rear end portion of the inner circumference of the trommel. An asphalt waste material recycling device characterized in that 2. The asphalt waste material recycling apparatus according to claim 1, further comprising an annular fall restriction fence provided at the rear end of the inner circumference of the trommel.