JPH0228644B2 - ASUFUARUTOHOSOYOSAGYOSHANIOKERUSUKARIFUAIYASOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a scarifier device for scraping a paved road surface in an asphalt pavement (repair) work vehicle.

Conventionally, this type of scarifier device is
A device is known that uses a plurality of rigid bars to scrape up the heated paved road surface.

By the way, when trying to raise a deep rutted area using the conventional scarifier device, the rigid bar may not be able to reach the deep rutted area (concave part), and in this case, the scarifier part is heated. When a new asphalt mixture is supplied and spread on top of this, the old asphalt mixture in the recesses and the newly supplied asphalt mixture do not fuse well. There is a problem that the surface layer easily peels off. In addition, if the rigid bar is lowered to reach the rutted area and scrape deeply, it will forcefully scrape up deep parts of the paved road surface other than the rutted area that have not been softened sufficiently. As a result,
There is a problem in that the aggregate contained in the area is crushed, leading to a decrease in quality such as the strength of the resurfaced road surface.

The present invention has been made in view of the above circumstances, and its purpose is to be able to scrape up the ruts even when the ruts are deep, and to sufficiently soften the paved road surface other than the ruts. To provide a scarifier device for an asphalt pavement work vehicle, which can prevent aggregate contained in the deep part from being crushed without forcibly raking up the deep part that has not been removed.

In order to achieve the above object, the present invention provides a scraping mechanism for scraping the paved road surface, which has a mechanism that extends behind the rigid bar, reaches at least below the rigid bar, and has a flexible mechanism that is more flexible than the rigid bar. The flexible bar is configured such that the flexible bar is bent when pressed against the paved road surface when the softening of the paved road surface due to heating does not reach a desired state. That is.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 6.

In the figure, reference numeral 1 indicates a running vehicle of the recycle heater A, and this running vehicle 1 runs by rotating wheels W by a drive device (not shown). The mount frame 2 is connected to the front side of the traveling vehicle 1 so as to be rotatable in the horizontal plane in the left-right direction, and the reinforcing member 1a is connected to the rear side of the traveling vehicle 1.
The rear mount frame 3 is connected to the rear frame 3 so as to be rotatable in a horizontal plane from side to side. A front slide arm 4 and a rear slide arm 5 are inserted into each mount frame 2, 3 so as to be vertically movable, and support plates 4a of each mount frame 2, 3 and each slide arm 4, 5 are inserted. , 5a, each slide arm 4, 5 is adapted to be raised and lowered along each gantry frame 2, 3 by lifting devices 6, 7 such as hydraulic cylinders, which are respectively installed between the slide arms 4, 5. Furthermore, a front heater unit 8 and a rear heater unit 9 for heating the road surface are attached to each of the support plates 4a and 5a by means of a hinge connection, respectively, to the vehicle 1.
It is supported so that it can be raised and lowered freely along the front and back direction,
These heater units 8, 9 are adapted to be rotated up and down by a winch (not shown) and respective wires 10, 11. Further, below the center of the traveling vehicle 1, a central heater unit 13 is supported by four hydraulic cylinders 12 so as to be movable up and down. Each of the above heater units 8, 9, 1
3 are fixed heater _H1 and this fixed heater respectively.
A cylinder device (not shown) connects the _left and right _movable heaters _H2 to a fixed heater.
The heating width can be adjusted by moving left and right with respect to _H1 .

A stopper 15 is attached by a bolt 15a to the tip of the support shaft 14 protruding from both rear sides of the traveling vehicle 1 in the left-right direction, and an interval support plate is fixed to the inner side of the stopper 15 of the support shaft 14 at an appropriate interval. 16, a pivot ring 17 is attached to the support shaft 14, and each pivot ring 17 has a leveling arm (support arm) 18, 19 having a U-shaped cross section at one end to which a reinforcing plate 20 is welded. A rectangular long hole 18 with a large vertical hole dimension is bored in the parts 18a and 19a.
b, 19b can be inserted and rotated in the vertical direction,
It is also provided so that it can be moved slightly up and down. The thickness of one end portion 18a, 19a of the leveling arms 18, 19 to which each reinforcing plate 20 is welded is set to be smaller than the distance between the stopper 15 and the spacing support plate 16. 18 and 19 are inclined in a plane perpendicular to the length direction thereof.

The other end 1 of each of the leveling arms 18, 19
Fixing members 21a and 22a are attached to 8c and 19c, respectively, which protrude upward from the left and right sides of the left and right pair of fixed scarifier ears 21 and 22 of the scarifier device main body B for scraping up the paved road surface. And each fixing member 21a, 2
2a and the ends of piston rods 24a of hydraulic cylinders 24 pin-coupled to both sides of the rear end of the vehicle 1 via mounting members 23, respectively, and chains 25.

Further, hook portions 18d and 19d are formed at the upper portions of the other ends of the leveling arms 18 and 19, respectively, and support members are respectively installed on the outside of each hydraulic cylinder 24 on both sides of the rear end of the traveling vehicle 1. When the scarifier device is stored, each hook portion 18 is attached to a pair of hanging metal fittings 27 that are locked to the
It is designed to hook d and 19d.

Rotating arms 29,
30 are hinged to each other so as to be rotatable in the left and right directions in a horizontal plane, and these rotating arms 29,
Left and right movable scarifier ears 32 and 33 are rotatably hinged to the free ends (rear ends) of 30 by pins 31 at the outer edges of their front ends. In addition, each movable scarifier ear 32, 33
Movable gates 34 and 35 are respectively installed on the rear side of the vehicle to collect the scraped up paving material to the center.

Furthermore, a hydraulic cylinder 37 for moving the left movable scarifier 32 is attached to the support member 36 attached to the right side of the fixed scarifier 22, with its piston rod 37a facing leftward. At the same time, the movable scarifier 3 on the right side is attached to the support member 38 attached to the left side of the fixed scarifier 21.
A hydraulic cylinder 39 for moving the cylinder 3 is installed horizontally with its piston rod 39a facing right. Piston rods 37a, 39a of these hydraulic cylinders 37, 39
Sliding members 40 and 41 pin-coupled to the tips of the
A pair of upper and lower guide members 42, 43 attached to the rear end surfaces of each fixed scarifier ear 21, 22, respectively;
Guide grooves 46 and 47 formed by 44 and 45
It is fitted in so that it can move freely from side to side. Further, each sliding member 40, 41 and the front inner edge of each movable scarifier ear 32, 33 are rotatably hinged by a pin 48.

By extending the piston rods 37a, 39a of the respective hydraulic cylinders 37, 39, the left and right rotating arms 29, 30 are rotated clockwise and counterclockwise in FIG. 2, respectively, about the respective pins 28. At the same time, the front inner edges of the left and right movable scarifiers 32, 33 move to the left and right along the guide members 42, 43, 44, 45, respectively, and the movable scarifiers 32, 3
3 to the left and right (outward side) of the fixed scarifier ears 21, 22 from the position where they overlap at the rear of each fixed scarifier ear 21, 22, which is their storage position.
It is starting to expand and expand.

Each of the fixed scarifier ears 21, 22 and the movable scarifier ears 32, 33 has a partition plate 49.
Due to this, the inside of the fixed frame 50 and the movable frame 51 is 2.
It is divided into separate spaces, and a scraping mechanism 52 is installed in each space.

Each of the above-mentioned scraping mechanisms 52 includes each of the above-mentioned frames 5
0, 51, support frames 54 are provided so as to be movable up and down via sliding plates 53, and at the lower front ends of these support frames 54, a plurality of rigid bars 55 having high rigidity are arranged at appropriate intervals. The support frame 5 is provided so as to protrude diagonally downward and backward through
4, a pair of front and rear support plates 56 are fixed in the longitudinal direction, and a plurality of flexible bars 5 in the shape of leaf springs each have one end attached to these support plates 56.
7 are arranged in a staggered manner in two rows, front and rear, at positions superimposed behind each of the rigid bars 55, and protrude obliquely downward and rearward to a position below the rigid bars 55. This flexible bar 57 has a rigid tip 57b at the tip of a spring-like main body 57a.
is installed.

Moreover, each support frame 5 of each of the above-mentioned scraping mechanisms 52
Between the rear inner surface of 4 and the fixed plate 58 fixed to the inner upper part of each of the frames 50 and 51, there is an elevation adjustment mechanism 59 for adjusting the movement of each scraping mechanism 52 in the vertical direction. Each is installed. These elevation adjustment mechanisms 59 are
Adjustment bolts 60 whose lower ends are attached to the rear inner surface of each of the support frames 54 so as to be rotatable in the front-rear direction are attached to each of the fixing plates 58 and a U-shaped support member 61 fixed on the fixing plates 58. A pair of nuts 6 are provided between each fixing plate 58 and the support member 61 of each adjustment bolt 60.
2 and 63 are screwed together.

Note that 64 is a fixed gate that is arranged behind the fixed scarifiers 21 and 22 and is attached to the partition plate 49 of the fixed scarifiers 21 and 22 with bolts via a bracket 65. Rotating pin 66 located
When a load above a certain level is applied by the shear pin 67, it rotates upward.

Next, the operation of the scarifier device in the asphalt paving vehicle constructed as described above will be explained.

When repairing asphalt pavement, each heater unit 8, 9 is brought horizontally and close to the road surface using a winch (not shown) and each lifting device 6, 7, and the heater unit 8, 9 is brought close to the road surface using a hydraulic cylinder 12. The heater unit 13 is brought closer to the road surface, and the left and right movable heaters H2 of each heater unit 8, 9, and ₁₃ are moved in the left-right direction relative to the fixed heater _H1 by a cylinder device (not shown) to increase the heating width. Adjust.

Also, by extending the piston rods 37a, 39a of each of the hydraulic cylinders 37, 39,
While deploying the left and right movable scarifier ears 32 and 33 to the left and right according to the heating width,
Piston rod 24a of left and right hydraulic cylinders 24
By expanding and contracting, the scarifier device main body B is rotated up and down about the support shaft 14 to adjust the raking depth.

At this time, each scraping mechanism 52 is moved up and down along the inner surface of each frame body 50, 51 by operating the pair of nuts 62, 63 of each elevation adjustment mechanism 59, as necessary. The scraping depth may be adjusted.

Next, by heating each heater unit 8, 9, 13, the paved road surface to be repaired is heated, and the traveling vehicle 1 is moved forward at low speed to scrape up each fixed scarifier ear 21, 22 and movable scarifier ear 32, 33. The mechanism 52 scrapes up the paved road surface.

At this time, even if the paved road surface is severely damaged and the ruts are deep, the paved road surface is sufficiently heated by the front heater unit 8 and the central heater unit 13 to reach a depth greater than the predetermined scraping depth. If the scarifier device main body B, which is suspended from the rear end of the traveling vehicle 1 by the hydraulic cylinder 24 and the chain 25, does not sink more than necessary, and each rigid bar 55 After the convex portion of the paved road surface is sufficiently scraped up to a predetermined scraping depth, the flexible bar 57 located behind it is pressed against the raised paved road surface and passes in a bent state. Further, in the recesses (rutted parts) of the paved road surface that the rigid bar 55 cannot reach, the flexible bar 57 reaches the recesses and scrapes up the surface.

Furthermore, if the paved road surface is not completely softened, the scarifier device body B rotates around the support shaft 14 and floats on the hard part of the paved road surface, so it scrapes only the softened part of the paved road surface. The hard part of the paved road surface is not forcibly scraped up, and the aggregate in the part is not crushed.

Subsequently, the paving material scraped up by each of the movable scarifiers 32, 33 is scraped into the center by a pair of movable gates 34, 35 disposed behind each of the movable scarifiers 32, 33. Supplied to the dugout. The paved road surface leveled in this way is further heated by the rear heater unit 9 to raise the average temperature of the paving material, and then scraped up by a subsequent repaver, remixer, drive roller, etc. The area will be leveled, leveled and repaved.

At this time, the concave portions (rutted portions) of the paved road surface are scraped up by the flexible bar 57 of the scraping mechanism 52, and then the paving material scraped from the side or new Asphalt mixture is supplied and spread evenly, so that the surface of the rutted area and the scraped paving material and new asphalt mixture are well fused, and as in the past,
Peeling of the surface layer of the regenerated paved road surface, which would occur if the surface of the rutted portion could not be scraped up but only heated, is prevented.

As explained above, the present invention is configured by installing a flexible bar behind a rigid bar that reaches at least below the rigid bar and has greater flexibility than the rigid bar, and the flexible bar is If the softening of the paved road surface due to heating does not reach a desired state, the flexible property is set so that it is pressed against the paved road surface and bends, so that the paved road surface is scraped up. Therefore, in deep rutted areas that the rigid bar cannot reach, the flexible bar can be used to scrape up the rutted areas, and the paving material is well fused with the paving material supplied to the raked up rutted areas. Not only does the surface layer of the rutted area not peel off, but also the protrusions other than the rutted areas can be scraped up to a predetermined raking depth with a rigid bar, ensuring that the protrusions are sufficiently softened. There is no need to forcefully scrape up deep areas where there is no material, and there is no possibility of crushing the aggregate. Therefore, the surface layer of the recycled pavement surface does not peel off over a long period of time in rutted areas, and the strength of the pavement surface does not deteriorate due to aggregate crushing, so a high quality recycled pavement surface can be obtained. Furthermore, it has excellent effects such as being able to prevent damage to the scarifier device due to forcibly scraping up parts that are not sufficiently softened.

[Brief explanation of drawings]

Figures 1 to 6 show an embodiment of the present invention, with Figure 1 being a side view, Figure 2 being a plan view, and Figure 3 being a plan view.
The figure is a side view of an asphalt pavement work vehicle equipped with the scarifier device according to the present invention, FIG. 4 is a sectional view taken along the - line in FIG. 1, FIG. 5 is a sectional view of the scraping mechanism, and FIG. FIG. 3 is a sectional view of the main body of the scarifier device. 52... Scraping mechanism, 55... Rigid bar,
57... Flexible bar, A... Recycled heater.

Claims (1)

[Claims] 1. In a scarifier device for an asphalt paving work vehicle equipped with a scraping mechanism for scraping a paved road surface, the scraping mechanism can reach behind the rigid bar, at least below the rigid bar, and be more flexible than the rigid bar. It is constructed by installing a flexible bar with a large degree of flexibility, and the flexible bar is
A scarfing hole device for an asphalt paving work vehicle, characterized in that its flexibility is set so that it bends when pressed against the paved road surface when the softening of the paved road surface due to heating does not reach a desired state.