JPH0156201B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention provides a method for loosening and leveling the pavement when ruts (depressions in vehicle transport areas) occur in the pavement of an asphalt-paved road due to wear, flow, etc. The present invention relates to a recycled paving machine for constructing a recycled pavement by supplying and spreading a new bituminous mixture thereon.

Next, the present invention will be explained in detail using illustrated examples.

The drawing shows a recycled paving machine according to an embodiment of the present invention, in which a flame-type heating device 10 for heating the pavement is installed at the bottom of a vehicle body 9 of a self-propelled vehicle 7.
is arranged, and a wire rope 12 hanging down from a winding drum 11 rotated by an elevating drive device is connected to the front and rear portions on both left and right sides of the heating device 10. It is connected to the vehicle body 9 via a steady rest link 13.

A large number of scraping steel protrusions 2 having a rectangular bar shape in cross section are fixed by welding or the like to the periphery of a cylindrical rotating body 1 extending in the left and right direction behind the heating device 10, and a rotating scraping member 3 is formed. Both ends of the rotary scraping member 3 are rotatably attached to the rear ends of arms 14 and 15, and one arm 14 is equipped with a hydraulic motor 16 for rotating the rotary scraping member 3. It is fixed and has a built-in rotation transmission mechanism, and each arm 14,
The front end of the connecting shaft 15 is fixed to the end of a connecting shaft 17 extending in the left-right direction, and the central portion of the connecting shaft 17 is rotatably fitted into a bearing 18, which is connected to a bracket fixed to the vehicle body 9. 19 by a support shaft 20 extending in the front-rear direction.

Further, the intermediate portions of the arms 14, 15 and the vehicle body 9 are connected via lifting hydraulic cylinders 21, 22, and when the respective hydraulic cylinders 21, 22 are expanded and contracted simultaneously, the rotary scraping member 3 is translated in the vertical direction. , when only one hydraulic cylinder is expanded or contracted,
Since the holding frame 23 consisting of the arms 14, 15 and the connecting shaft 17 is rotated about the support shaft 20, the angle of the rotary scraping member 3 with respect to the horizontal plane is adjusted.

Behind the rotary scraping member, a pair of left and right strip-shaped scraping members 24 are disposed such that the interval becomes narrower from the front to the rear, and the scraping members 24 are connected to a holding plate 25 and a scraping plate. 26, the holding plate 25 is provided with a plurality of elongated holes 27 extending in the vertical direction, and a guide/connection pin 28 made of a bolt is inserted through the elongated holes 27 and the scraping plate 26. , the scraping plate 26 is connected to the holding plate 25 by the pin 28 so as not to be separated, and the scraping plate 26 is connected to the holding plate 25 by the elongated hole 27 and the pin 28.
is guided with respect to the holding plate 25 so as to be movable in the vertical direction in FIG.

The holding plate 25 and the scraping plate 26 are connected via a height-adjusting hydraulic cylinder 29, and the upper end of the holding plate 25 is pivoted by a pivot 31 to a support member 30 fixed to the lower part of the vehicle body 9. and the bracket 3 fixed to the holding plate 25 and the vehicle body 9.
2 are connected to each other via a rotating hydraulic cylinder 33, and when the scraping member 24 is used for scraping, the rotating hydraulic cylinder 33 positions the scraping member 24 in a substantially vertical position as shown in FIG. When the raking member 24 is rotated and the raking member 24 is not used, the raking member 24 is rotated to a horizontal position as shown in FIG. 5 by the rotating hydraulic cylinder 33.

An elevating frame 35 is fitted into an elevating guide member 34 fixed to the rear portion of the vehicle body 9, and the elevating frame 35 and the vehicle body 9 are connected via an elevating fluid pressure cylinder 36, and rotated by a rotary joint 37. A spreading screw 40 consisting of a left helical screw 38 and a right helical screw 39 which are freely and unbendably connected is connected to the scraping member 2.
A holding member 41 is arranged so as to extend in the left-right direction behind the spreading screw 40, and rotatably supports both ends of the spreading screw 40.
It is fitted into the elevating frame 35 so as to be movable up and down.
In addition, a height adjusting screw 43 is screwed into a female screw member 42 fixed to both left and right sides of the elevating frame 35.
The lower end of the screw rod 43 is rotatably connected to a holding member 41, and a screw rotation hydraulic motor 44 is fixed to each of the holding members 41, and the left helical screw 38 and the right helical screw 39
can be rotated forward or backward, and can also be rotated independently at arbitrary speeds.

At the rear of the spreading screw 40, a compacting and leveling blade 4 is arranged to extend in the left and right direction, and above the blade 4, a female screw member 45 fixed to both left and right sides of the lifting frame 35 has a height. The adjustment screw 46 is screwed together,
A connecting member 47 rotatably attached to the lower end of the screw rod 46 is connected to the end of the blade 4 via a buffer member 48 made of rubber, and the blade 4 is further connected to a hydraulic motor 49 and a hydraulic motor 49. A vibration excitation device 50 having an eccentric body rotated by is attached.

A spreading screw 5 consisting of a left helical screw 52 and a right helical screw 53 which are rotatably and unbendably connected by a rotary joint 51 is disposed behind the blade 4 so as to extend in the left-right direction. Both ends of the spreading screw 5 are rotatably supported by an elevating frame 35, and hydraulic motors 54 for rotating the screws are fixed to the left and right sides of the elevating frame 35 to rotate the left helical screw 52 and the right helical screw 53. , are configured so that they can each rotate forward or backward, and can also rotate independently at arbitrary speeds.

The front ends of both arms of the U-shaped planar support frame 55 are pivotally connected to the vehicle body 9 by a horizontal shaft 56,
Further, the intermediate portions on both left and right sides of the support frame 55 and the vehicle body 9 are connected via a lifting hydraulic cylinder 57, and a screed 6 whose curvature is adjustable extends in the left and right direction at the rear of the spreading screw 5.
The left and right front portions of the frame 58 supporting the screed 6 are pivotally connected to the support frame 55 by a pivot shaft 59 extending in the left and right direction. Further, a partition plate 60 is fixed to the front part of the frame 58, and female thread members 61 are attached to both left and right sides of the rear part of the support frame 58 by support shafts extending in the left and right direction, and are screwed to the female thread members 61. The lower end of the inclination adjusting screw 62 is rotatably connected to the rear part of the frame 58. Note that the screed curvature adjustment mechanism is well known, so a description thereof will be omitted.

A hopper 63 for receiving a bitumen mixture for paving from a transport vehicle is mounted and fixed on the front part of the vehicle body 9,
A conveyor 64 consisting of a bar feeder is arranged to extend from the lower part of the hopper 63 to above the center of the spreading screw 5 and is fixed to the car body 9, and furthermore, the conveyor 64 is provided with a bituminous mixture at the delivery end thereof. A bituminous mixture supply section 8 consisting of a chute for dropping and supplying the bituminous mixture is provided near the center of the spreading screw 5, and the bituminous mixture that has fallen from the bituminous mixture supply section 8 is provided at the rear of the lifting frame 35. A fall guide member 65 for preventing the spreading screw 5 from escaping to the rear.
is fixed.

When resurfacing an asphalt pavement using the recycled paving machine of the above embodiment, the pavement body 66 is heated by a flame-type heating device (not shown) that moves in advance of the recycled paving machine; Next, the vicinity of the surface of the pavement 66 is heated by the heating device 10 of the regenerated pavement machine that runs following the heating device, and then the surface side portion of the heated pavement 66 is heated by a large number of rotary scraping members 3. Scrape with protrusion 2.

Next, the paving material generated by the scraping is collected at the center in the width direction of the vehicle by the raking member 24, and then the raked paving material is distributed to a uniform temperature distribution and particle size distribution by the spreading screw 40 at the front. Spread it from side to side while doing so, and then use the compacting and leveling blade 4.
Perform compaction and leveling.

Next, a new bituminous mixture that is continuously supplied from the bituminous mixture supply section 8 to the vicinity of the center of the rear spreading screw 5 is spread from side to side by the screw 5, and then the spread bituminous mixture is spread from side to side by the screw 5. The blue mixture is spread evenly by a screed 6, and then compacted by a compaction roller that runs following the recycled paving machine, thereby producing a recycled pavement consisting of a loosened recycled paving material layer and a new bituminous mixture layer. complete.

When carrying out this invention, the shape of the loosening protrusion 2 may be any shape other than that shown in the drawings.
Alternatively, the scraping member 24 and the spreading screw 40 at the front may be omitted, and the paving material generated by scraping may be compacted while being spread evenly with the blade 4.

According to this invention, the compacting and leveling blade 4, the spreading screw 5, and the screed 6, which are vibrated by the rotating loosening member 3 and the vibrating device 50, which extend in the left and right direction, respectively, move from the front to the rear. As the new bituminous mixture is supplied from the bituminous mixture supply section 8 toward the screw 5, the pavements have depressions such as ruts. The surface side of the body is scraped to an appropriate depth by the protrusions 2 of the rotary scraping member 3 to form a scraped paving material, and then the paving material is compacted by the compacting and leveling blade 4. After being spread while being compacted, a new bituminous mixture is supplied onto the paving material that has been spread while being compacted, and is spread by the screed 5 and then spread by the screed 6. , the recycled pavement is constructed, and therefore:
It is possible to obtain the effect that a pavement body having depressions such as ruts can be repaved easily, efficiently, and firmly.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of a recycled paving machine, Fig. 2 is a perspective view showing a rotary scraping member and its support structure,
FIG. 3 is a plan view of the raking device, FIG. 4 is a perspective view showing the raking member in a vertical position, and FIG. 5 is a perspective view showing the raking member in a horizontal position.
FIG. 6 is a perspective view showing a spreading screw, a leveling blade, and its support structure, and FIG. 7 is a partially longitudinal front view showing an intermediate rotary joint portion of the spreading screw. In the figure, 1 is a rotating body, 2 is a protrusion for loosening, 3 is a rotary loosening member, 4 is a compacting and leveling blade, 5 is a screw for spreading, 6 is a screed, 7 is a vehicle, 8 9 is a bituminous mixture supply unit, 9 is a vehicle body, 10 is a flame heating device, 14
15 is an arm, 16 is a hydraulic motor, 17 is a connecting shaft, 18 is a bearing, 20 is a support shaft, 21 and 2
2 is a lifting fluid pressure cylinder, 23 is a holding frame, 24 is a band-like scraping member, 29 is a height adjustment fluid pressure cylinder, 33 is a rotating fluid pressure cylinder, 34 is a lifting guide member, 35 is a lifting frame, 36 is a hydraulic cylinder for lifting, 37 is a rotary joint, 38 is a left spiral screw, 39 is a right spiral screw, 40 is a spreading screw, 44 is a hydraulic motor for rotation, 48 is a buffer member, and 50 is a vibration device. , 51 is a rotating joint, 52 is a left spiral screw,
53 is a right spiral screw, 54 is a hydraulic motor for rotating the screw, 55 is a support frame, 57 is a hydraulic cylinder for lifting and lowering, 63 is a hopper, and 64 is a conveyor.

Claims (1)

[Claims] 1 Compacting and leveling blades each extending in the left and right direction are placed behind a rotary loosening member 3 consisting of a rotating body 1 extending in the left and right direction and a number of loosening protrusions 2 fixed around the rotating body 1 4. Spreading screw 5 and screed 6
are arranged in sequence, the compacting and leveling blade 4 is equipped with a vibrating device 50, the rotating loosening member 3, the blade 4, the screw 5 and the screed 6 are mounted on the vehicle 7, and the screw 5 A recycled paving machine characterized in that a bituminous mixture supply section 8 is provided above the machine.