JPH018567Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a road surface resurfacing device for resurfacing damaged asphalt pavement on asphalt-painted roads. This makes it possible to choose whether to use it as a container or to scrape it out.

[Conventional technology]

Conventional road resurfacing equipment includes, for example, road resurfacing equipment that uses the so-called repaving method, in which scraped paving material is laid down on the underside of the road surface, and new paving material is layered on top of it before resurfacing. .
According to this device, ruts, cracks, patched road surfaces, etc. are loosened, this is laid on the underside of the road surface, and new paving material is layered on top of it for resurfacing, so the surface becomes the new paving material. This method has the advantage of being able to regenerate a flat road surface with the same strength as asphalt pavement.

In addition, as other road surface paving equipment,
There is something disclosed in Publication No. 29705 (name of invention: Paving machine for scraped road surface or road surface removed from pavement). This is a so-called remixing method in which a worm duct equipped with a milling cutter is rotated to scrape off the asphalt road surface, and the scraped paving material is mixed with new paving material in a mixing device before being paved again. It uses a method called. According to this device, the mixed paving material that has been scraped off and new paving material is mixed on the road surface, so the degree of bonding between the paving material particles can be increased, and the resurfaced road surface can be resurfaced. It has the advantage of increasing strength.

[The problem that the idea aims to solve]

However, the conventional resurfacing equipment described above is configured to resurface by layering or mixing the old composite material that has been loosened and the new composite material, so the level of the resurfaced road surface is actually The level of the road surface exceeded the level required for the road, and each time resurfacing was repeated, the road surface level rose, and in the end, there was a problem in which all of the old composite material had to be removed before resurfacing.

Therefore, this invention was devised by focusing on the problems of the conventional device, and its purpose is to provide the loosening means with a transfer function to transfer the loosened old composite material in a direction that intersects with the direction of movement. The object of the present invention is to provide a road surface resurfacing device that can adjust the road surface level by selecting whether to reuse the old mixed material or discharge it to the outside through this transfer function.

[Means to solve the problem]

This invention provides a traveling vehicle with a means for loosening the asphalt pavement surface, and a stirring means for stirring the old composite material loosened by the loosening means.
A new composite material conveying means for conveying the new composite material, a spreading means for uniformly spreading the stirred mixture discharged from the stirring means in the width direction of the road surface, and a spreading means for spreading the paving mixture evenly. The loosening means includes a loosening tool spirally formed on a rotating shaft, a forward/reverse drive source that rotationally drives the rotating shaft, and a rotation control that controls the forward/reverse switching of the forward/reverse drive source. A storage opening of a housing containing a stirring blade constituting the stirring means is arranged on the side where the old mixed material moves when the scraping tool rotates in the normal direction, and a housing opening of a housing containing stirring blades constituting the stirring means is arranged on the side where the old mixed material moves when the scraping tool rotates in the normal direction. The present invention relates to a road surface resurfacing device characterized in that the moving side of old composite material is exposed to the outside.

[Effect]

A rotation control device controls a forward/reverse drive source to control the direction of rotation of the scraping tool in either forward or reverse direction;
During this normal rotation, the old mixed material scraped by the scraper is moved by the action of the spiral to the receiving opening of the casing containing stirring blades serving as stirring means. Therefore, the old mixture is stored in the housing through this storage port, where it is stirred again and used for resurfacing. Further, when the spiral scraping device is reversed, the old mixed material is moved to the outside, and the old mixed material is scraped out of the device and is not used again.

〔Example〕

This invention will be explained below based on the drawings.

Fig. 1 is a schematic configuration diagram showing an embodiment of this invention, Fig. 2 A and B are a plan view showing the opening/closing means of the conveyance mechanism and a sectional view thereof taken along the line B-B, and Fig. 3 is a scraping mechanism. FIG. 4 is a side view showing an example of the means, FIG. 5 is a sectional view taken along line V-V in FIGS. 3 and 4, and FIG. 6 is a drive motor drive control circuit for the loosening means. FIG. 7 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 that receives new composite material from a new composite material transport vehicle (not shown) such as a dump truck is provided at the front part of the vehicle body 2, and the new composite material discharged from the lower part of this receiving hopper 6 is The mixed material is conveyed diagonally upward by a first chain conveyor 7 serving as a composite material conveying means, and 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 84 and a leveling means 87, 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 the chain conveyor 7 has a bottom plate 1 on the upper side that covers the lower part of the 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 upward by the chain section and the bottom plate 11, and the chain conveyor 8 conveys the new composite material by the chain section and the bottom plate 12 below.

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 82 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 contracted 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 means 23 for scraping the asphalt pavement material is arranged at a position in contact with the road surface 21, and a stirring means 24 is connected to the rear side thereof. has been done.

Examples of the loosening means 23 are shown in FIGS. 3 to 6.
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 at the bottom of these support brackets 28 and 29,
As shown in FIG. 3, a pair of guide tubes 30 and 31 are fitted in parallel. FIG. 5 shows the fixed shaft 27 and the front guide tube 30. And guide tube 3
The sliding shafts 32 and 33 are inserted into the insides of the shafts 0 and 31, respectively.
Both outer ends of these sliding shafts 32 and 33 are connected to the connecting plate 3.
4,35. A scarifier ear 36 as a scraping tool is rotatably housed between the connecting plates 34 and 35. This scarifier 36 includes a rotating shaft 37 rotatably supported between connecting plates 34 and 35, and a rotating shaft 37 rotatably supported between connecting plates 34 and 35.
7 and a large number of pin-shaped cutters 39 protruding from the outer periphery of the screw 38 at required intervals. A scraping blade 40 extending along the axial direction of the scarifier ear 36 is integrally disposed slightly rearward of the scarifier ear 36 between the connecting plates 34 and 35. In this case, the downward protrusion length of the scraping blade 40 can be adjusted using an adjustment bolt 41.

Furthermore, the left and right scraping mechanisms 25L and 25
In R, left and right fluid pressure cylinders 42 are arranged along the left and right fixed shafts 27, and each cylinder tube 4
The inner ends of the shafts 3 are fixed to the inner ends of the left and right fixed shafts 27 with plates opened at the center of the vehicle body. Further, piston rods 44 are individually connected to the left and right connecting plates 34 from the left and right cylinder tubes 43 toward the left and right outer sides of the vehicle body. Therefore, by extending the piston rod 44, the loosening mechanisms 25L and 25R protrude outward, and by conversely contracting the piston rod 44, they are moved inward and their outer end positions become the loosening mechanisms. 26
It is approximately equal to the outer end position of . 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 a forward/reverse hydraulic motor 46L, 4 as a rotation drive source via a drive chain 45.
Connected to 6R. These forward and reverse hydraulic motors 46L and 46R are connected to a drive control circuit 4 shown in FIG.
7. That is, forward and reverse hydraulic motors 46L and 46R are connected in series to the main pump 48 via electromagnetic switching valves 49L and 49R, respectively, to form a closed circuit. In addition, the main pump 48
A flushing valve 50 is interposed in parallel with this. Therefore, by switching the electromagnetic switching valves 49L and 49R, the forward and reverse hydraulic motors 46L,
46R can be independently rotated forward or reverse. Note that 51 is a feed pump, 52 is an oil tank, and 53 and 54 are relief valves.

Further, in the scraping mechanism 26, a scarifier ear 56 is rotatably supported in a casing 55 whose lower end is open. The scarifier ear 56 includes a rotary shaft 57 rotatably disposed within the casing 55, a screw 58 formed on the rotary shaft 57, and a large number of scarifiers 56 protruding from the outer periphery of the screw 58 at required intervals. The screw 58 has a spiral direction reversed at its center. The rotary shaft 57 is connected to a one-way hydraulic motor 61 as a rotational drive source via a drive chain 60, and as the hydraulic motor 61 rotates, the old mixed material scraped up is gathered to the center side. It is composed of Further, a scraping blade 62 extending along the axial direction of the scarifier ear 56 is integrally disposed slightly rearwardly of the scarifier ear 56 within the housing 55 . in this case,
The downward protrusion length of the blade 62 can be adjusted using an adjustment bolt 63.

In addition, each scraping mechanism 25L, 25R and 2
Reference numeral 6 denotes a vertical movement mechanism 64 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 65 when viewed from the side where it is suspended and supported by. That is,
Support arms 68 and 69 are slidably fitted to vertical shafts 66 and 67 arranged on the frame 65, and an engagement plate portion 70 has the support arms 68 formed at the lower ends thereof.
The support arm 69 is movably engaged with a guide frame 71 fixed to the loosening mechanisms 25L and 25R to support the loosening mechanisms 25L and 25R.
It is attached to the housing 55 of. Between the frame 65 and the engagement plate part 70 and the frame 65
Vertical movement mechanisms 72 and 73 constituted by fluid pressure cylinders are interposed between the housing 55 and the housing 55 . Therefore, by operating the vertical movement mechanism 64, the scarifier ears 36, 56 and scraping blades 40, 62 of the scraping mechanisms 25L, 25R, and 26 are moved to the upper position where they are spaced upward from the road surface 21, and the scarifier ears 36, 56 and The scraping blades 40, 62 are moved between an upper position where they contact the road surface 21. In addition, the vertical movement mechanism 72,
By operating 73, the loosening mechanism 2
5L, 25R and 26 scarifier ears 36,5
6 and the scraping blades 40, 62, the road surface 2
It is moved between the position where it touches 1 and the loosening position where it digs in below. Note that 74 is a rotating arm that guides the vertical movement of the scraping mechanisms 25L and 25R interposed between the fixed shaft 27 and the vehicle body 2.

As shown in FIG. 7, the stirring means 24 has a storage opening 75 for storing the old mixed material scraped in the center by the scarifier ear 56 of the scraping mechanism 26.
It has a casing 77 having a discharge port 76 opposite to the storage port 75. Thus, the accommodation port 7
5 is the inlet of the old mixed material, and the discharge port 76 is its outlet. Inside the casing 77, rotating shafts 78 and 79 that rotate at a predetermined interval in the left-right direction are arranged in parallel, and a plurality of stirring blades 80 are respectively mounted on these rotating shafts 78 and 79 to prevent them from colliding with each other. The blades 81 attached to the tips of these blades are tilted so as to stir the mixture and transport it backwards. Further, a new composite material receiving port 82 is formed on the upper surface of the casing 77 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 casing 77 is heated by a heater 83 disposed behind it, and then is averaged in the width direction of the road surface 21 by a diffusion means 84. This spreading means 84 is composed of a screw conveyor 85 whose spiral direction has been changed at the center, and a blade screed 86 disposed behind the screw conveyor 85. further average it out.

Thereafter, the composite material is spread evenly by a spreading means 87 provided at the rear end of the vehicle body 2. An example of this leveling means 87 includes a screed 89 that vibrates the road surface, which is rotatably attached to the vehicle body 2 by a rotary arm 88, and a composite material disposed in front of the screed 89. It is configured by a screw conveyor 90 that spreads the particles in the width direction of the road surface.

The heaters 22 and 83 are supplied with propane gas from an LPG cylinder 91 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 means 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.
Open the 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 thrown into the new mixed material receptacle 82 of the stirring means 24.

In addition, before starting resurfacing, each of the scraping mechanisms 25L, 25R, and 26
The scraping means 23 is used in accordance with the width of the road surface to be resurfaced with the piston rods of the scarifiers 36 and 56 contracted, that is, with the scarifiers 36 and 56 separated from the road surface.
The front side scraping mechanisms 25L, 25R are caused to project outward by driving the fluid pressure cylinder 42, and the protruding lengths of the scraping blades 40 and 62 of the scraping mechanisms 25L, 25R, and 26 are adjusted. At the same time, the rotation direction of the scarifier 36 of the scraping mechanisms 25L, 25R is selected by operating the electromagnetic switching valves 49L, 49R of the rotation control circuit 47 in accordance with the road surface level to be finished by resurfacing. In this case, the loosening mechanism 25L
By rotating the 25R scarifier ear 36 in the normal direction, the loosened old composite material is collected in the center part, and by rotating it in the reverse direction, the old composite material is scraped out to the outside. Therefore, when reusing all of the scraped old composite material, the scarifier ears 36 of the scraping mechanisms 25L and 25R are rotated in the normal direction, and when scraping a part of the old composite material to the outside, the scarifier ears 36 of the scraping mechanisms 25L and 25R are rotated in the normal direction. Scarifiaia 36
In order to further scrape out a small amount of the old mixture to the outside, one of the scraping mechanisms 25L and 25R is rotated in the normal direction and the other is rotated in the reverse direction. In addition, the amount of scraping or scraping is determined by the scarifier ear 3.
Therefore, the desired rotation speed can be adjusted by the rotation control circuit 47, and the scraping amount can also be adjusted by repeating forward and reverse rotation of the scarifier ear 36.

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 side loosening mechanisms 25L and 25R of the loosening means 23 are first applied to the softened road surface 21.
is lowered by the vertical movement mechanism 72. As a result, the old composite material that has been softened by the road surface heating vehicle is loosened by the cooperation of the scarifier ear 36 and the scraping blade 40, and the scarifier ear 36
Depending on the direction of rotation, it is either collected in the center or scraped out.

Then, 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 73 of the rear loosening mechanism 26 moves forward. The scarifier ear 56 and the scraping blade 62 are driven down. Therefore,
The road surface in the central part, which has not been loosened by the 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, among the scraped old composite materials, the old composite materials collected in the center by the scraping mechanisms 25L, 25R, and 26 are collected by the stirring means 24 as the road surface resurfacing device 1 travels. It is housed in the housing 77 of the camera through the housing opening 75 thereof. 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 77 of the stirring means 24. The mixed material is evenly stirred and mixed by the stirring blades 80. The stirred and mixed old and new composite material is then transferred to the discharge port 76 side and dropped onto the road surface 21 by the transfer action of the stirring blades 80.

The mixed material that has fallen onto the road surface 21 is reheated by the heater 83, then uniformly spread in the width direction of the road surface by the stirring means 84, and then spread evenly by the leveling means 87 to form a predetermined road surface. Finished with a flat surface with a level.

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 72 of the front scraping mechanisms 25L and 25R are driven in the opposite direction to the above to remove the scarifier ear 36 and scrape. Raise the blade 40. Next, when the rear scraping mechanism 26 reaches the work end point,
The up and down movement mechanism 72 of the scraping mechanism 26 is driven in the opposite direction to the above to raise the scarifier ear 56 and the scraping blade 62. Thereby, the loosening 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 hydraulic cylinder 16 in the opening/closing mechanism 13 provided on the chain conveyor 8 is is driven to retract the piston rod 17 and close the opening 14 of the bottom plate 12 with the opening/closing plate 15. As a result, the new composite material stored in the receiving hopper 6 is conveyed by the chain conveyors 7 and 8 and falls onto the road surface 21 between the spreading means 84 and the leveling means 87.

In this way, the road surface resurfacing device 1 is run in the same way as described above, the old mixture is loosened by the loosening means 23, and only this 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 76 of the stirring means 24. Then, the discharged mixed mixed material is uniformly spread in the width direction of the road surface by the spreading means 84. The new composite material falling from the chain conveyor 8 is layered on top of the spread old composite material, so that the layered new composite material is uniformly distributed in the width direction of the road surface by the screw conveyor 90 of the leveling means 87. After that, it is spread evenly with a screed 89 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 the deteriorated old mixed material can be appropriately stirred, 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 case where the loosening means 23 has a two-stage structure of the loosening mechanisms 25L, 25R, and 26 has been described.
It can be configured with only one loosening mechanism, and as the loosening mechanism, it is possible to apply a loosening mechanism that has the function of transporting not only the scarifier but also other old composite materials in a direction that intersects the direction of movement. In short, it is sufficient if it is configured to scrape up or scrape out the old composite material that has been scraped up.

[Effect of idea]

As explained above, according to this invention, when laminating or mixing the loosened old composite material and new composite material, it is possible to adjust the amount of old composite material reused, and therefore the road surface level adjustment can be easily carried out, and in some cases, it has the effect of being able to scrape out all of the loosened old composite material to the outside and perform resurfacing with only new composite material.

[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 of an opening/closing means, and FIG. 3 is a diagram of a loosening means. A plan view showing an example, FIG. 4 is a side view of the same,
FIG. 5 is a sectional view taken along the line V-V in FIGS. 3 and 4;
FIG. 6 is a hydraulic circuit diagram showing a drive control circuit for a hydraulic motor, and FIG. 7 is a sectional view showing an example of stirring means. 1... Road surface resurfacing device, 2... Vehicle body, 6... Receiving hopper, 7, 8... Chain conveyor, 23...
...Rubbing means, 24...Stirring means, 25L,
25R, 26... Scraping mechanism, 36, 56...
... Scarifier, 46L, 46R... Forward/reverse hydraulic motor, 47... Rotation control circuit, 75... Accommodation port (inlet), 84... Diffusion means, 87... Leveling means.

Claims (1)

[Scope of utility model registration request] A traveling vehicle is provided with a means for loosening an asphalt pavement surface, a stirring means for stirring the old composite material loosened by the loosening means, a new composite material conveying means for conveying the new composite material, and the stirring means. A spreading means for uniformly spreading the stirred mixture discharged from the road surface in the width direction of the road surface, and a spreading means for leveling the paving mixture, and the spreading means is arranged in a spiral manner on a rotating shaft. It is composed of a formed scraping tool, a forward/reverse drive source that rotationally drives the rotating shaft, and a rotation control device that controls the forward/reverse switching of the forward/reverse drive source. The housing opening of the housing containing the stirring blades constituting the stirring means is arranged on the moving side of the mixed material, and the moving side of the old mixed material is exposed to the outside when the scraping tool is reversed. Characteristic road surface resurfacing equipment.