JPH0118654Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a road surface loosening device used when resurfacing damaged asphalt pavement on an asphalt-paved road. It can be aligned in any direction.

This type of road surface loosening device loosens the asphalt pavement material and replenishes it with new composite material when the asphalt pavement needs to be repaired due to deformation due to ruts, deterioration due to weather conditions, etc. This is applied when resurfacing the road surface.

When resurfacing a road surface in this way, it is necessary to adjust the loosening width of the loosening mechanism according to the width of the resurfaced road surface. Stepped,
At least one of them needs to be configured to be movable in the width direction of the road surface. However, in the case where the loosening mechanisms are provided in two stages, front and rear, if both of them dig into the road surface at the same time at the start of loosening, the loosening start positions will shift and become uneven due to the difference in their installation positions. In particular, when a road surface is resurfaced using a road surface resurfacing device, there is a problem in that the uneven portions must be resurfaced separately, and joints cannot be connected accurately. This problem also applies to the end of loosening.

Therefore, this invention was devised by focusing on the problems of the conventional device, and its purpose is to align the loosening position in the width direction of the road surface, regardless of the road surface width, when loosening the road surface. An object of the present invention is to provide a road surface loosening device capable of starting or ending a road surface loosening operation.

In order to achieve the above-mentioned object, this invention provides two front and rear parts for a running vehicle, as shown in the illustrated embodiment, for example.
A tiered loosening mechanism is provided, and both the front and rear scraping mechanisms are individually provided with vertical movement mechanisms that move them up and down independently, and at least one of the front and rear scraping mechanisms can be used to loosen the left and right scraping mechanisms. A road surface resurfacing device comprising a mechanism, and each of the left and right scraping mechanisms is individually equipped with a width direction moving mechanism that moves these mechanisms outward in the width direction of the vehicle body to vary the scraping width. This relates to a loosening device.

This invention will be explained below based on the drawings.

FIG. 1 is a schematic configuration diagram showing an example of applying this invention to a roadside paving device, and FIGS. 2A and 2B are a plan view and a diagram showing an example of the opening/closing means in the new composite material conveying means, respectively. This is a sectional view taken along line B-B. 3, 4, and 5 are a plan view, a side view, and a sectional view showing an embodiment of this invention, and FIG. 6 is a sectional view showing an example of the stirring means.

The road surface resurfacing device 1 is configured such that a front wheel 3 and a rear wheel 4 are attached to a vehicle body 2, and is self-propelled by an engine 5 mounted in the center of the vehicle body 2.

A receiving hopper 6 is provided at the front of the vehicle body 2 to receive new composite material (asphalt paving material) from a new composite material transport vehicle (not shown) such as a dump truck, and the material is discharged from the lower part of the receiving hopper 6. The new composite material is conveyed obliquely upward by a first chain conveyor 7 serving as a new composite material conveying means, and is delivered onto a second chain conveyor 8. This second chain conveyor 8 transports the new composite material to a position corresponding to a space between a spreading means 76 and a leveling means 79, which will be described later, and drops the new composite material between these.

As shown in FIG. 2, each chain conveyor 7, 8 has a scraping board 10 between endless chains 9L, 9R arranged in parallel with each other at a required interval in the width direction of the vehicle body 2.
are bridged at predetermined intervals, and for the chain conveyor 7, a bottom plate 1 covering the lower part of the upper chain part
1, the chain conveyor 8 has a structure in which bottom plates 12 are respectively disposed to cover the lower part of the lower chain portion. Therefore, the chain conveyor 7 conveys the new composite material using the upper chain portion and the bottom plate 11, and the chain conveyor 8 conveys the new composite material using the lower chain portion and the bottom plate 12.

The chain conveyor 8 includes a stirring mechanism 2, which will be described later.
The opening/closing mechanism 1 is located at the position corresponding to the new composite material socket 74 of 4.
3 are arranged. This opening/closing mechanism 13 includes an opening 14 formed in the bottom plate 12 and extending in the width direction.
an opening/closing plate 15 that opens and closes this opening 14; a fluid pressure cylinder 16 that drives this opening/closing plate 15 to open and close;
The opening/closing drive mechanism 19 includes the piston rod 17 and a rotating arm 18 connected to the opening/closing plate 15. When the piston rod 17 of the fluid pressure cylinder 16 is in the extended state, the opening/closing plate 15 is in the closed position closing the opening 14 of the bottom plate 12, and when the piston rod 17 is in the extended state,
The opening/closing plates 15 are each moved to an open position in which the opening 14 is opened. Note that 20 is a discharge chute provided on the lower surface of the bottom plate 12.

Further, a heater 22 is disposed on the front end side of the vehicle body 2 in close proximity to the road surface 21, and the road surface 21 is reheated by this heater 22.

Further, between the front wheels 3 and rear wheels 4 of the vehicle body 2, a scraping device 23 for scraping old composite material (asphalt pavement material) is disposed at a position in contact with the road surface 21, and a stirring device 23 is disposed on the rear side thereof. A device 24 is installed in series.

An example of the loosening device 23 is shown in FIGS. 3 and 4.
As shown in the figure, it has loosening mechanisms 25L and 25R provided symmetrically on the front side, and a loosening mechanism 26 provided parallel to these mechanisms behind them. In the loosening mechanisms 25L and 25R, a pair of support brackets 28 and 29 are respectively attached to both ends of a fixed shaft 27 connected at the center, and a pair of support brackets 28 and 29 are attached to the lower part of these support brackets 28 and 29 as shown in FIG. A pair of guide tubes 30 and 31 are fitted in parallel. Sliding shafts 32, 33 are inserted into the guide tubes 30, 31, respectively, and both outer ends of these sliding shafts 32, 33 are connected by connecting plates 34, 35. A scarifier 36 is rotatably housed between the connecting plates 34 and 35. This scarifier ear 36 is connected to the connecting plate 3
A rotating shaft 37 rotatably supported between 4 and 35.
A spiral screw 38 is formed on the rotating shaft 37, and a large number of pin-shaped cutters 3 are protruded from the outer periphery of the screw 38 at required intervals.
It consists of 9. Further, a scraping blade 40 is integrally attached to the slightly rear side of the scarifier ear 36. In this case, the blade 40
The length of the downward protrusion can be adjusted using an adjustment bolt 41.

Furthermore, the loosening mechanisms 25L and 25R are
A fluid pressure cylinder 42 is disposed along the fixed shaft 27, its cylinder tube 43 is fixed to the center of the fixed shaft 27, and the piston rod 44 is connected to the connecting plate 3.
It is connected to 4. Such a hydraulic cylinder 42
A widthwise movement mechanism is configured. Therefore, by extending the piston rod 44, the loosening mechanisms 25L and 25R protrude outward, and by contracting the piston rod 44, they slide inward, and the outer end positions of the loosening mechanisms 25L and 25R protrude outward. It is approximately equal to the outer end position of No. 26. In addition, in the scraping mechanisms 25L and 25R, the screws 38 of the scarifier ears 36 are spiraled in opposite directions, and each rotating shaft 37 is connected to the drive chain 4.
5 to a reversible hydraulic motor 46 as a rotational drive source.

Further, in the scraping mechanism 26, a scarifier ear 48 is rotatably supported within a casing 47 whose lower end is open. The scarifier ear 48 includes a rotary shaft 49 rotatably disposed within the casing 47, a screw 50 formed on the rotary shaft 49, and a large number of scarifiers 48 protruding from the outer periphery of the screw 50 at required intervals. The helical direction of the screw 50 is reversed at the center thereof. The rotating shaft 49 is connected to a one-way hydraulic motor 53 as a rotational drive source via a drive chain 52, and as the hydraulic motor 53 rotates, the old mixed material scraped up is collected toward the center side. It is composed of In addition, a scraping blade 54 is provided slightly rearward of the scarifier ear 48.
is attached as one piece. In this case, the blade 54 has a downward protruding length that extends from the adjustment bolt 55.
It is said that it can be adjusted by

In addition, each scraping mechanism 25L, 25R and 2
Reference numeral 6 denotes a vertical movement mechanism 56 rotatably supported by the vehicle body 2 and constituted by a common fluid pressure cylinder, for example.
It is supported in a vertically movable manner by a gate-shaped frame 57 when viewed from the side where it is suspended and supported by. That is,
Support arms 60 and 61 are slidably fitted to vertical shafts 58 and 59 disposed on the frame 57, and an engagement plate portion 62 is formed at the lower end of the support arms 60.
The support arm 61 is slidably engaged with a guide frame 63 fixed to the loosening mechanisms 25L and 25R to support the loosening mechanisms 25L and 25R.
It is attached to the housing 47 of. Then, between the frame 57 and the engagement plate part 62 and the frame 57
Vertical movement mechanisms 64 and 65 constituted by fluid pressure cylinders are interposed between the housing 47 and the housing 47 . Therefore, by operating the vertical movement mechanism 56, the scarifier ears 36, 48 and scraping blades 40, 54 of the scraping mechanisms 25L, 25R, and 26 are placed in the upper position where they are separated upward from the road surface 21, and the scarifier ears 36, 48, and The scraping blades 40, 54 are moved between a lower position where they contact the road surface 21. In addition, the vertical movement mechanism 64,
By operating 65, the loosening mechanism 2
5L, 25R and 26 scarifier ears 36, 4
7 and the scraping blades 40 and 54 on the road surface 21
It is moved between the position where it touches and the loosening position where it digs in below. In addition, 66 is a scraping mechanism 2 interposed between the fixed shaft 27 and the vehicle body 2.
This is a rotating arm that guides the vertical movement of 5L and 25R.

As shown in FIG. 6, the stirring device 24 has a storage opening 67 for storing the old mixed material scraped in the center by the scarifier ear 48 of the scraping mechanism 26.
It has a casing 69 having a discharge port 68 opposite to the storage port 67 . Inside the housing 69, rotating shafts 70 and 71 are arranged parallel to each other at a predetermined interval in the left-right direction.
A plurality of stirring blades 72 are arranged so as not to collide with each other, and the blades 7 are attached to their tips.
3 is tilted so as to transport the mixed material backward while stirring it. Further, a new composite material receiving port 74 is formed on the upper surface of the casing 69 to receive the new composite material falling from the discharge chute 20 of the opening/closing mechanism 13 described above.

The stirred mixture discharged from the housing 69 is heated by a heater 75 disposed behind it, and then averaged in the width direction of the road surface 21 by a diffusion device 76. This spreading device 76 is composed of a screw conveyor 77 whose helical direction has been changed at the center, and a blade screed 78 disposed behind the screw conveyor 77. further average it out.

Thereafter, a leveling device 79 disposed at the rear end of the vehicle body 2 spreads the composite material evenly. An example of this leveling device 79 includes a screed 81 that vibrates the road surface, which is rotatably attached to the vehicle body 2 by a rotary arm 80, and a new composite material disposed in front of the screed 81. and a screw conveyor 82 that spreads the water in the width direction of the road surface.

The heaters 22 and 75 are supplied with propane gas from an LPG cylinder 83 placed on the vehicle body 2, and burn it with a gas burner (not shown) to heat the road surface.

Next, the effect will be explained. First, a case will be described in which the resurfacing method is a so-called remixing method in which old composite material loosened by a scraping device is mixed with new composite material and the mixed composite material is spread evenly. In this case, the piston rod 17 of the fluid pressure cylinder 16 in the opening/closing mechanism 13 is extended to open the bottom plate 12.
opening 14 of. Therefore, the new composite material stored in the receiving hopper 6 is conveyed to the upper center of the car body 2 by the chain conveyor 7, and then falls onto the chain conveyor 8, thereby being conveyed to the opening 14 position. Then, since the opening 14 is open, the mixed material falls downward along the discharge chute 20 and is introduced into the new mixed material receptacle 74 of the stirring device 24.

In addition, before starting resurfacing, each of the scraping mechanisms 25L, 25R, and 26 is moved by the vertical movement mechanism 56.
The scraping device 23 is operated according to the width of the road surface to be resurfaced with the piston rods of the scarifiers 36 and 48 in a contracted state, that is, with the scarifiers 36 and 48 separated from the road surface.
The front side loosening mechanisms 25L and 25R are caused to protrude outward by driving the fluid pressure cylinder 42.

In this state, first, a road surface heating vehicle (not shown) equipped with a heater is set as a leader, and the road surface resurfacing device 1 is caused to travel following the vehicle. At this time, the distance between the two is set to such an extent that the asphalt pavement surface, which has been softened by heating by the road heating vehicle, will not harden.

Next, the front loosening mechanisms 25L and 25R of the loosening device 23 are first applied to the softened road surface 21.
, while the scarifier ear 36 is rotated by the reversible hydraulic motor 46 so as to scrape up the old mixed material in the center part, and the vertical movement mechanism 64
lower it by. As a result, the old composite material that has been softened by the road surface heating vehicle is loosened and collected in the center.

When the road resurfacing device 1 moves forward and the rear loosening mechanism 26 reaches the position of the road surface loosened by the front side loosening mechanisms 25L and 25R, the vertical movement mechanism 65 of the rear loosening mechanism 26 moves forward. The scarifier ear 48 and the scraping blade 54 are driven down. Therefore,
The road surface in the center, which was not loosened by the front loosening mechanisms 25L and 25R, is loosened by the rear loosening mechanism 26, so that the road surface is loosened while being aligned on a line perpendicular to the width direction of the road surface. You can start.

In this way, the scraped old composite material is collected in the center by the scraping mechanisms 25L, 25R, and 26, so that the old composite material collected as the road resurfacing device 1 runs is agitated. It is accommodated in the housing 69 of the device 24 through its accommodation opening 67 . On the other hand, the new composite material dropped from the opening 14 from the receiving hopper 6 via the chain conveyors 7 and 8 is supplied into the casing 69 of the stirring device 24. The mixed material is stirred and mixed evenly by the stirring blade 72. Then, the stirred and mixed old and new composite materials are transferred to the discharge port 68 side and dropped onto the road surface 21 by the transfer action of the stirring blades 72.

The mixed material that has fallen onto the road surface 21 is reheated by the heater 75, then uniformly spread in the width direction of the road surface by the diffusion device 76, and then spread evenly by the leveling mechanism 79 to form a flat surface. It will be finished.

In this way, when the road surface resurfacing work progresses and reaches the end point of the resurfacing work, first, the up and down movement mechanisms 64 of the front scraping mechanisms 25L and 25R are driven in the opposite direction to the above, and the scarifier ear 36 and the scraping Raise the blade 40. Next, when the rear scraping mechanism 26 reaches the work end point,
The vertical movement mechanism 65 of the scraping mechanism 26 is driven in the opposite direction to the above to raise the scarifier ear 48 and the scraping blade 54. This results in
The scraping end position at the work end point can be aligned on a line perpendicular to the road surface.

In addition, when resurfacing by the so-called repaving method in which new composite material is layered and spread over old composite material that has been scraped, first the fluid pressure cylinder 16 in the opening/closing mechanism 13 provided on the chain conveyor 8 is The piston rod 17 is driven to expand and contract, and the opening 14 of the bottom plate 12 is closed by the opening/closing plate 15.
As a result, the new composite material stored in the receiving hopper 6 is transported by the chain conveyors 7 and 8 to the road surface 2 between the spreading device 76 and the leveling device 79.
Fall to 1.

In this way, the road surface resurfacing device 1 is run in the same manner as described above, the old mixture is loosened by the scraping device 23, and only the loosened old mixture is stirred by the stirring means 24, and then, This stirred old composite material is discharged onto the road surface from the discharge port 68 of the stirring device 24. Then, the discharged mixed mixed material is uniformly spread in the width direction of the road surface by a spreading device 76. The new composite material falling from the chain conveyor 8 is layered on top of the dispersed old composite material, so the layered new composite material is uniformly distributed in the width direction of the road surface by the screw conveyor 82 of the leveling device 79. Then, it is spread evenly with a screed 81 and finished into a flat surface.

In this way, even when the repaving method is used, the old mixed material that has been loosened is stirred by the stirring means, so that the deteriorated old mixed material can be appropriately agitated, and the road surface is improved when resurfacing. It is possible to prevent variations in the quality of the old composite material in the width direction.

In addition, in the above embodiment, the loosening mechanism is not limited to the scarifier, but other loosening mechanisms can be applied, and the point is that the loosening mechanism is configured to collect the loosened old composite material and supply it to the stirring device 24. It's good to have.

Further, the vertical movement mechanisms 56, 64, and 65 are not limited to fluid pressure cylinders, and it goes without saying that links or other movement mechanisms may be used.

Furthermore, this invention is not limited to being incorporated into the road surface resurfacing device 1, but may be incorporated into another vehicle, or may be installed in an independent vehicle.

As explained above, according to this invention, two stages of loosening mechanisms, front and rear, are disposed on a running vehicle, and each of the front and rear loosening mechanisms has an individual vertical movement mechanism that moves them up and down independently. In addition to preparing for the The configuration includes separate directional movement mechanisms.

Therefore, when the vehicle is moving forward, the two vertical movement mechanisms individually move the front and rear scraping mechanisms up and down, and when scraping starts, the front scraping mechanism is lowered first, and then the rear scraping mechanism is lowered. It has become possible to lower the loosening mechanism, and when the loosening is finished, first raise the front loosening mechanism and then raise the rear loosening mechanism. Therefore, even if the respective loosening widths of the front and rear loosening mechanisms are different, the loosening start positions of both the front and rear loosening mechanisms are the same,
In addition, since the end positions of the construction sections also coincide, the joints of each construction section can be accurately connected on a line extending in the road width direction, which has the effect of preventing road surface damage at the joint positions. be.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of this invention, FIGS. 2A and B are a plan view and a sectional view taken along the line B-B, and FIGS. 3 and 4 are diagrams showing an example of the opening/closing means. , a plan view and a side view showing an example of the stirring means, FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 3, and FIG. 6 is a cross-sectional view showing an example of the stirring means. 1...Road surface resurfacing device, 2...Car body, 6...Receiving hopper, 7, 8...Chain conveyor, 13...
...opening/closing mechanism, 23... loosening device, 24...
Stirring means, 25L, 25R, 26... Scraping mechanism, 36... Scarifier, 40... Scraping blade, 42... Fluid pressure cylinder, 48...
... Scarifier, 54 ... Scraping blade, 56, 64, 65 ... Vertical movement mechanism, 76 ...
...diffusing means, 79... spreading means.

Claims (1)

[Scope of utility model registration request] The traveling vehicle is provided with two stages of loosening mechanisms, front and rear, and each of the front and rear loosening mechanisms is individually provided with a vertical movement mechanism that moves them up and down independently, and at least one of the front and rear loosening mechanisms is provided. is composed of left and right scraping mechanisms, and each of the left and right scraping mechanisms is individually equipped with a width direction moving mechanism that advances and retreats them outward in the width direction of the vehicle body to vary the scraping width. Road surface loosening device.