JPS6245362B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention is attached to an asphalt pavement repair vehicle for repairing an asphalt pavement road,
This relates to a mixer device that swallows the regenerated mixture stirred up while being heated from the existing pavement, and sends this regenerated mixture and a separately supplied new mixture to the rear of the vehicle while stirring.

When repairing an asphalt-paved road using an asphalt-pavement repair vehicle, if it is necessary to improve the properties of the road's surface layer mixture, the existing pavement is heated and softened, scraped to a predetermined depth with a cutter, and the scraped regeneration process is performed. The mixture is swallowed into a mixer device installed in an asphalt pavement repair vehicle (hereinafter simply referred to as a vehicle), and this regenerated mixture and a new mixture for property improvement, etc., which is supplied separately, are stirred and mixed by the mixer device. Repairs are carried out by sending the stirred mixture to the rear of the vehicle and spreading it evenly to improve the properties of the surface layer mixture.

As shown in the schematic diagram of FIG. 1 with the vehicle portion omitted, the mixer device includes an agitation feed device 2 in a mixer casing 1, and is arranged in front of the agitation feed device 2 (to the left in the figure) to scrape up existing pavement. The road surface mixture stirred up by the cutter that performs this, that is, the rotary carificer 3 (this stirred up surface layer mixture is called the regenerated mixture 4, as it will be used again for paving), is collected only as the vehicle moves forward. The regenerated mixture 4 and the new mixture, which is separately replenished into the mixer casing 1, are sent to the rear while being stirred by the stirring and feeding device 2.
In the conventional mixer device 5 described above, an inlet 6 for swallowing the regenerated mixture 4 was provided at the front part of the mixer casing 1. Swallowing of the recycled mixture 4 through the intake ports 6 is not performed forcibly, but the recycled mixture 4 on the road is scooped up when the mixer device 5 moves forward together with the vehicle. In such a method, the rim of the intake port 6 may push the regenerated mixture 4 forward, which not only increases the running resistance of the vehicle but also pushes the regenerated mixture 4 to the side of the mixer casing 1. However, the regenerated mixture 4 does not enter the mixer casing 1 smoothly, and the width of the intake port 6 must be increased in order to make it as smooth as possible. For this reason, the conventional mixer device 5
However, the work efficiency was low and the weight of the mixer device was also large.

This invention provides a mixer casing that is open at the front and rear and whose front ends of the left and right side plates extend forward beyond the front edge of the bottom plate, with the opening direction facing the front and rear direction of an asphalt pavement repair vehicle. The mixer casing is supported on an asphalt pavement repair vehicle, and is provided with a number of paddles from the front end to the rear end within the mixer casing, and is rotated in the circumferential direction by a drive device to transfer the regenerated mixture to the above mixer casing by the action of the blades of the paddles. The above-mentioned conventional problems can be solved by providing a shaft that moves inside the mixer casing from front to back, with its axial direction facing the front-rear direction of the asphalt pavement repair vehicle, and with its front end protruding forward from the front edge of the bottom plate. With this solution, the recycled mixture can be swallowed smoothly, improving work efficiency.
Another object of the present invention is to obtain a mixer device for an asphalt pavement repair vehicle that can reduce the weight of the mixer device itself.

An embodiment of the present invention will be described below with reference to FIG. 2 and subsequent figures.

FIG. 2 shows a side view of an asphalt pavement repair vehicle equipped with the mixer device of the present invention. (left in Figure 2). A hopper 13 for receiving a new mixture is provided at the front upper part of the vehicle, and a plurality of liquefied gas fuel cylinders 14 are placed at the rear of the hopper 13. Further, in the lower part of the vehicle, from the front toward the rear, there is a heating device 15 that heats and softens the paved surface using the liquefied gas as fuel, and a rotary scarifier 16 that cuts and scrapes the softened paved surface, which will be described later. Mixer device 1 of the present invention
7. A first screed 18 that spreads the mixture in the vehicle width direction, a first screed 19 that spreads the mixture evenly, a second screed 20 that also spreads the mixture in the vehicle width direction, and a second screed 21 that spreads it evenly. It is provided. Each of the above-mentioned working devices, that is, the heating device 15, the rotary califier 1
6, mixer device 17, first screw 18, first
The screed 19, the second screed 20, and the second screed 21 are pulled up as shown in the figure while the vehicle is running, but during work, for example, the heating device 15 is not pulled up as shown by the two-dot chain line. It is designed to be able to descend and approach asphalt pavement surfaces.

The above-mentioned vehicle is capable of carrying out various road repair methods. For example, it can be used without being equipped with the mixer device 17, and the recycled mixture stirred up by the rotary carificer 16 is mixed with the first screw 18 across the width of the vehicle. The new mixture conveyed from the hopper 13 and sprinkled is spread in the second screw 20,
A road repair method in which this is leveled with a second screed 21 is possible.

To explain the details of the mixer device 17, the third
The figure is a side view, FIG. 4 is a plan view, and FIG. 5 is a front view.
A front frame 24, a gear box 25, a bottom plate 26, etc., which will be described later and which also serves as a rear frame and constitutes a part of the mixer casing 22, are open at the top and are also open at the front and rear.

The mixer casing 22 is equipped with a stirring and feeding device 27 inside it. This stirring and feeding device 27
are two parallel shafts 2 that extend in the longitudinal direction of the vehicle.
The front end of the shaft 28 is supported by a bearing 30 attached to the lower side of the front frame 24, and the rear part of the shaft 28 also serves as the rear frame and is connected to the mixer casing 2.
Each shaft 28 is supported by a bearing (not shown) of the gearbox 25, which constitutes a part of the gearbox 25, and is rotationally driven by the power of the engine 11 transmitted to the input shaft 31 via a reduction gear within the gearbox 25. Further, as shown by arrows A and B in FIG. 5, the paddles 29 on the left side rotate to the left when viewed from the front, and those on the right side rotate to the right.
The slope of the blades 29a of the paddle 29 is oriented to move the mixture toward the rear of the vehicle when it turns downward.

To explain the mixer casing 22 in more detail, the bottom plate 26 has a shape that combines two arcuate parts 26a along the rotation radius of the left and right paddles 29, respectively, as shown in FIG. It is said to be 32. A liner 26b is attached to the upper surface of the bottom plate 26. The intake opening 32 is formed of a slope that slopes downward from the front end of the arc-shaped portion 26a of the bottom plate 26, and the front edge 32a of the intake opening 32 (the front edge of the bottom plate 26) is as shown in FIG. It is horizontal and close to the asphalt pavement surface. Therefore, the front edge 32a of the intake port 32 has two arcuate shapes when viewed from above, as shown in FIG.

In the present invention, a forced feed device 33 for forcibly guiding the regenerated mixture to the intake port 32 is provided in front of the intake port 32. The forced feeding device 33 of this embodiment includes a portion extending forward from the intake port 32 of the agitation feeding device 27 described above. Therefore, swallowing port 3
2 is not provided at the front end of the mixer casing as in the conventional example shown in FIG. 1, but is provided slightly rearward from the front end of the mixer casing 22. It extends forward from the position of the entrance 32.

To explain the support of the mixer casing 22, as shown in FIG. The front part of the mixer is connected to a frame 35 supported by a hydraulic cylinder device 45 provided on the frame 34 via a connecting rod 36, and the lower limit is regulated by a stopper 35a integrated with the frame 35. For the rear part of the casing 22, the frame 34
A support member 38 attached to the tip of a piston rod 37a of a hydraulic cylinder device 37 provided in
is supported via a shackle 39.

Next, an example of road repair work using the above-mentioned vehicle will be explained. During the work, the frame 34 is lowered and each working device, that is, the heating device 15, the rotary califier 16, the mixer device 17, the second screw 20, the second The screed 21 is lowered. Note that each working device can be raised and lowered independently, and in this embodiment, the first screw 18 and the first screed 19 are not used, so they are raised as shown in FIG.

As the vehicle moves forward, the surface mixture of the asphalt pavement heated by the heating device 15 is stirred by the rotary scarifier 16, and the stirred regenerated mixture 40 is transferred to the mixer device 17. It is swallowed into the mixer casing 22 through the intake port 32. That is, the regenerated mixture 40 enters between the front ends of the left and right side plates 23 extending forward from the front edge 32a of the bottom plate 26, and there, it is pushed upward by the rotating action of the blade 29a of the paddle 29 of the forced feeding device 33. It is scraped up so that it floats, is sent rearward, passes through the front edge 32a, and is sent onto the bottom plate 26. Therefore, very little of the regenerated mixture 40 is pushed forward by directly contacting the front edge 32a of the bottom plate 26, and even if it is pushed by the front edge 32a, it is instantaneous and is immediately removed by the blades 29a of the paddle 29. As it is swept upward,
The front end portions of the side plates 23 extend on the left and right sides of the front edge 32a of the bottom plate 26 to prevent the regenerated mixture 40 from escaping in the lateral direction, so that the stirred regenerated mixture 40 is efficiently and smoothly It will be incorporated into stirring and feeding equipment. On the other hand, a new mixture 42 was put into hopper 13 from dump truck 41.
is transported rearward by the transport device 43 and falls onto the front part of the mixer casing 22 from above. This falling position is a portion in front of the intake port 32, and the portion of the stirring feed device 27 in front of the intake port 32 functions as a forced feed device 33, forcing the regenerated mixture 40 to the intake port 32. At the same time, the regenerated mixture 40 and the new mixture 42 are stirred to mix them. In the conventional method, the mixer casing simply scoops and swallows the regenerated mixture from the intake port as the vehicle moves forward, but in the present invention, the forced feed device 3
3 is also performed at the same time, the regenerated mixture 40 can be swallowed into the mixer casing 22 extremely smoothly. Therefore, work efficiency is significantly improved. Since swallowing is smooth, it is not necessary to unnecessarily enlarge the swallowing opening, and the mixer device 17 can be easily reduced in size and weight. Further, in this embodiment, the mixer device 1
A part of the stirring feeding device 27 of No. 7 is a forced feeding device 33.
Since it is used as a regenerated mixture 40
It not only functions to send the water to the swallowing port 32, but also
The regenerated mixture 40 and the new mixture 42 are also mixed, and the mixing effect of the mixer device 17 is significantly improved.

The regenerated mixture and the new mixture sent into the mixer casing 22 through the intake port 32 are further mixed by the stirring feed device 27 and sent to the rear, and are discharged from the rear outlet of the mixer casing 22. . This discharged regeneration mixture 4
The mixture of 0 and the new mixture 42, that is, the stirred mixture 44, is spread in the vehicle width direction by the second screw 20, and then spread out by the second screed 21. FIG. 7 shows the flow of the regenerated mixture 40 and the new mixture 42 as seen from above. In addition,
In this FIG. 7, a regenerated mixture 40 and a new mixture 42 are shown.
They are not distinguished by hatching.

In the embodiment, a part of the stirring and feeding device 27 is used as the forced feeding device 33, but a forced feeding device can also be provided separately.

Also, the falling position of the new mixture 42 is the swallowing port 3.
2, but it does not necessarily have to be that way, and may fall into the mixer casing 22 at the rear of the intake port 32.

As explained above, the present invention has a mixer casing which is open at the front and rear and whose front ends of the left and right side plates extend forward beyond the front edge of the bottom plate, so that the mixer casing has an open front and a rear part and the front ends of the left and right side plates extend forward beyond the front edge of the bottom plate. The mixer casing is supported by the asphalt pavement repair vehicle in a direction, and has a number of paddles in the mixer casing from the front end to the rear end, and is rotated in the circumferential direction by a drive device to transfer the regenerated mixture to the paddles. A shaft that moves the inside of the mixer casing from front to rear by the action of a blade is provided with its axis directed in the front-rear direction of the asphalt pavement repair vehicle, and its front end protrudes forward from the front edge of the bottom plate. The regenerated mixture is scraped up by the rotating action of the blades of the paddle provided in front of the edge, passing backward through the front edge of the bottom plate, thereby preventing the regenerated mixture from coming into contact with the front edge of the bottom plate as much as possible, and preventing the recycled mixture from coming into contact with the front edge of the bottom plate. The front end portions of the left and right side plates extending forwardly prevent the regenerated mixture from escaping to the left and right, so the regenerated mixture is smoothly absorbed into the mixer device, and the regenerated mixture and The work efficiency of road repair work, which improves the properties of the surface layer mixture of asphalt-paved roads by mixing it with the new mixture, has been significantly improved. Since the regenerated mixture is swallowed smoothly, it is not necessary to make the intake port unnecessarily large, and the mixer device can be easily made smaller and lighter. When the new mixture is dropped at the position, the new mixture and the regenerated mixture can be mixed more effectively, and various other excellent effects can be achieved.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing a conventional mixer device, Figure 2 is a schematic diagram showing a conventional mixer device.
The following figures show one embodiment of the present invention: Fig. 2 is a side view of an asphalt pavement repair vehicle equipped with the mixer device of the present invention, Fig. 3 is a side view of the mixer device, and Fig. 4 is the same. 5 is a front view of the same, FIG. 6 is a side view of the asphalt pavement repair vehicle showing the road repair work situation, and FIG. 7 is an explanatory diagram showing the flow of recycled mixture and new mixture seen from above. be. 13... hopper, 16... rotary califier, 17... mixer device, 20... second screw, 21... second screed, 22... mixer casing, 23... side plate, 24... front frame , 25... Gearbox, 26... Bottom plate, 26
a... arcuate portion, 26b... liner, 27... stirring feeding device, 28... shaft, 9... paddle,
32... swallowing port, 33... forced feeding device, 4
0... Regenerated mixture, 42... New mixture, 44...
Stir the mixture.

Claims (1)

[Claims] 1. A mixer casing with openings at the front and rear and with the front ends of the left and right side plates extending further forward than the front edge of the bottom plate is used for asphalt pavement repair with the opening direction facing the front and rear direction of the asphalt pavement repair vehicle. The mixer casing is supported by a commercial vehicle, and the mixer casing has a number of paddles extending from the front end to the rear end, and is rotated in the circumferential direction by a drive device to move the regenerated mixture inside the mixer casing by the action of the blades of the paddles. An asphalt pavement repair vehicle, characterized in that a shaft for moving the asphalt pavement repair vehicle from front to rear is provided with its axial direction directed in the front-rear direction of the asphalt pavement repair vehicle, and its front end protruding forward from the front edge of the bottom plate. mixer equipment.