JPS632485Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Technical field The present invention relates to an apparatus for regenerating conventional asphalt pavement such as asphalt paved roads.

(2) Prior art In general, roads paved with asphalt mixtures are subject to plastic deformation over time due to the passage of heavy vehicles, etc., and to prevent slips in cold and snowy regions. Tire chains and spiked tires attached to automobiles wear out and cause ruts on the pavement. Furthermore, cracking and peeling occur due to aging of the asphalt mixture.
Since the occurrence of these unevenness such as ruts impairs the safety of vehicle driving, repair and maintenance of roads has become an extremely important issue.

The surface of the paved road (asphalt pavement) where these irregularities have occurred can be regenerated and repaired using conventional asphalt mixture while driving on the asphalt pavement, thereby minimizing traffic restrictions and improving the safety of vehicle driving. Regeneration devices have been proposed that aim to improve repair work efficiency and reduce repair costs. That is,
After scraping the asphalt pavement to a predetermined depth with a cutter attached to the bottom of the self-propelled vehicle,
Additives are added to the scraped asphalt mixture to regenerate it, and it is leveled to a predetermined height using a leveling device. Furthermore, the new asphalt mixture is supplied from a conveying device such as a belt conveyor to the area to be supplemented by the driver's operation, and is leveled to make it flush with the conventional asphalt pavement surface.

However, in such recycling equipment, the new asphalt mixture is transported by a transport device, so the amount of transport is not constant, and this is corrected based on the intuition of the driver, resulting in variations in the amount supplied. There was an excess or deficiency in the new asphalt mixture that was supplied, causing a decline in the quality of asphalt pavement. Furthermore, since the supply amount of new asphalt mixture was controlled manually by a driver or the like, the efficiency of repair work was reduced.

(3) Purpose and outline of the invention The present invention was created in view of these conventional problems, and aims to control the actual supply amount to bring it closer to the target amount, thereby eliminating excess or deficiency in the supply amount of new asphalt mixture. This is what I did. That is, as shown in FIG. 1, the present invention includes a supply amount adjusting means A for adjusting the supply amount of the new asphalt mixture, and a weight detection means B for detecting the supply weight of the new asphalt mixture, A signal from the target amount setting means C, which sets the target amount according to the detected value of the vehicle speed detection means F, is inputted to compare and judge the actual supply amount and the target amount (comparison and judgment means D), and based on this judgment result. Based on this, the supply amount adjusting means (control means E) is controlled (control means E) so as to reduce the comparative deviation amount, thereby bringing the actual supply amount closer to the target amount.

(4) Embodiment Hereinafter, the present invention will be explained based on an embodiment shown in FIGS. 2 to 6.

In FIG. 1, wheels 2 and rear wheels 3 are attached to an asphalt regeneration device 1. As shown in FIG. A cab 4 is provided on the top of the asphalt regeneration device 1,
Mounted in front of the driver's cab 4 is an engine 5 that drives the device 1 and serves as a driving source for each part of the device. The front wheels 2 are provided with a steering mechanism (not shown) for steering the device 1 . The rear wheels 3 are provided with a continuously variable transmission (not shown) that varies the traveling speed during refurbishment and repair.

A hopper 6 is provided at the front upper part of the device 1 to receive and store new asphalt mixture from a dump truck or the like. A conveyor 7 is provided at the bottom of the hopper 6 to convey the new asphalt mixture in the hopper 6 to the rear of the apparatus 1.

A spiral blade 8 is provided behind the rear wheel 3.
A cylindrical cutter 9 is provided so as to extend in the width direction of the vehicle.The cutter 9 is formed on the outer periphery so as to be wound in the opposite direction in the width direction of the vehicle with the center of the vehicle as the boundary. A plurality of bits (not shown) are arranged at predetermined intervals on the blade 8 to loosen the heated asphalt pavement. Side cutters 10 having the same configuration as the cutter 9 (however, the blades are oriented in one direction) are disposed on the left and right rear sides of the cutter 9, respectively. These katsuta 9,10
are rotationally driven by a drive mechanism (not shown) and are moved up and down by a hydraulic cylinder (not shown), and the side cutters 10 each move in the width direction of the vehicle to change the overall length of the cutters 9 and 10 in the width direction of the vehicle. The depth and width of the asphalt pavement to be scraped and loosened are adjustable.

Behind the cutters 9 and 10, there is a blade 11 that levels the loosened asphalt mixture to a predetermined height.
is provided parallel to the cutter 9, and this blade 11
Side blades 12 having the same configuration as the blade 11 are provided on the left and right rear sides of the blade. These blades 11 and 12 are moved up and down by a hydraulic cylinder (not shown), and the side blade 12
The blades 11 and 12 are moved in parallel in the vehicle width direction to change the overall length of the blades 11 and 12 in the vehicle width direction, so that the leveling depth and width can be adjusted.

Behind the blades 11 and 12, a screw conveyor 13 is provided which spreads and scatters the new asphalt mixture supplied from the conveyor 7 on the surface leveled by the blades 11 and 12 in the vehicle width direction. . Leveling arms 14 are swingably attached to both sides of the device 1, and a screw conveyor 13 is attached to the rear end of the leveling arm 14.
A pair of screeds 15a and 15b are provided for leveling the new asphalt mixture supplied through the screed and the loosened asphalt mixture to a predetermined height. These screeds 15a and 15b are located on the right side and left side of the device 1, respectively, and extend in the width direction of the vehicle and are arranged shifted back and forth, and are moved in the width direction by a hydraulic cylinder (not shown).
The width on which the screeds 15a and 15b act can be adjusted. Also, leveling arm 1
A hydraulic cylinder 16 for vertically moving the screeds 15a and 15b is provided at the rear end of the screed 4. Further, a vibrator 17 for compacting the asphalt mixture is provided on the screeds 15a and 15b. 1
8 is a spray nozzle for spraying an additive for regenerating aged asphalt mixture.

As shown in FIG. 3, the conveyor 7 has a plate-shaped drag pan 19 extending to the rear of the device 1 for receiving the new asphalt mixture from the hopper 6.
The drag chain 2 is located close to the top of the drag pan 19.
0 is provided, and the drag chain 20 is stretched between a driven pulley 21 at the front of the device and a driving pulley 22 at the rear. The drive pulley 22 is connected to a variable speed motor 24 via a chain 23.

Further, in the horizontal part of the rear drag chain 20, a hinge 25 is attached to the rear end of the drag pan 19, and a base end of a plate-shaped measuring frame 26 having a predetermined area is rotatably attached to the hinge 25. installed on. A load sensor 27 as a weight detection means is attached to the tip of the weighing frame 26, and when the new asphalt mixture conveyed on the drag pan 19 by the drag chain 20 passes over the weighing frame 26, it is measured based on its weight. The frame 26 rotates clockwise around the hinge 25, and the load sensor 27 detects a detection signal corresponding to the weight of the new asphalt mixture on the weighing frame 26, and outputs this detection signal to a control device 28, which will be described later. . 29 is a gate attached to an opening in the side wall of the hopper 6. Further, as shown in FIG. 4, the input terminal of the variable speed motor 24 has
A drive circuit 30 for variably adjusting the rotational speed of the motor 24 is connected, and the rotational speed of the variable speed motor 24 is varied in response to an operation signal from the control device 28, thereby changing the moving speed of the conveyor 7. There is. Further, the variable speed motor 24 is provided with a rotation speed sensor 24a that detects this rotation speed. Furthermore, a vehicle speed sensor 31 is provided to detect the traveling speed of the vehicle.

Here, the metering frame 26 constitutes a supply amount detection means. Further, the variable speed motor 24 and the drive circuit 30 constitute a supply amount adjusting means for adjusting the supply amount of the new asphalt mixture.

The rotational speed sensor 24a and the load sensor 27 output respective detection signals to the arithmetic circuit 32 of the control device 28, as shown in FIG. The calculation circuit 32 calculates the actual supply amount of new asphalt mixture supplied to the loosened asphalt mixture from these detection signals, and compares and judges this calculated supply amount (actual supply amount Q') signal. Output to means 33. That is, the actual supply amount Q' is q'×u from the conveyance speed U of the conveyor 7 and the detected amount q' of the load sensor 27. Further, the arithmetic circuit 32 outputs a supply amount signal to the recorder 37, and the recorder 37 records the actual supply amount. Further, a target amount signal that is a target amount of new asphalt mixture to be supplied to the loosened asphalt mixture is inputted to the comparison and determination means 33 from the target amount setting unit 34 . The target amount setting unit 34 includes a setting unit that sets a target supply amount of new asphalt composite material to be supplied per unit length of the loosened asphalt composite material by measuring the speed signal from the vehicle speed 31 and in advance. 3
Signals from 4a are input, and a target amount is set based on these signals. That is, the target amount q×V=Q is calculated from the vehicle speed V and the target supply amount q per unit length.

The comparison and determination means 33 compares and determines the supply amount signal and the target amount signal and determines the comparison deviation amount K(Q'-
Q) Output the signal to the control unit 36 via the PID control unit 35. The control unit 36 controls the comparison deviation amount signal K.
An operating signal is output to the drive circuit 30 based on (Q'-Q), and the rotational speed of the variable speed motor 24 is variably adjusted. Therefore, since the moving speed of the conveyor 7 is variable, the amount of new asphalt mixture supplied by the conveyor 7 per unit time is controlled, and the new asphalt mixture is supplied to the asphalt mixture per unit length corresponding to the vehicle speed. The amount is variably adjusted.

Here, the control device 28 and the recorder 37 are attached to an operation panel (not shown) attached to the driver's cab 4.

Next, the operation of the reproducing apparatus having such a configuration will be explained with reference to FIG. 6.

First, by surveying the asphalt pavement to be recycled and repaired, a target supply amount of new asphalt composite material per unit length of previously loosened asphalt composite material is calculated, and this is input into the setting section 34a. Then, while running the asphalt pavement regeneration device on the asphalt pavement, the asphalt pavement is loosened by a predetermined depth (double-dashed line in Fig. 6) using cutters 9 and 10, and the loosened asphalt mixture is transferred to the blade 11. , 12 to a predetermined height (dotted chain line in Figure 6).

A new asphalt mixture is supplied from the conveyor 7 via the screed conveyor 13 onto the leveled asphalt mixture, and is leveled flush with the conventional asphalt pavement surface on both sides by the screeds 15a and 15b. (shaded area in the figure). At this time, the load sensor 27 detects the new asphalt passing over the weighing frame 26 based on the amount of displacement of the frame 26 and outputs it to the control circuit 28.
A rotational speed signal is output to the control device 28 from 4a. Further, the vehicle speed signal from the vehicle speed sensor 31 and the signal from the setting section 34a are input, and the target amount setting section 34 calculates a target amount corresponding to the vehicle speed, and outputs it to the comparison/judgment means 29 of the control device 28.

Further, the calculation circuit 28 calculates the actual supply amount based on the detection signal and outputs this signal to the comparison and determination means 33. The comparison/judgment means 33 is the arithmetic circuit 2
8 and the signal from the target amount setting section 34 and outputs a comparative deviation amount to the control section 36 via the PID control 35. The control unit 35 outputs an operation signal to the drive circuit 30 in order to bring the supply amount closer to the target amount based on the comparison deviation amount. That is, the drive circuit 30 increases or decreases the rotational speed of the variable speed motor 24 to increase or decrease the conveyance amount of the new asphalt mixture by the conveyor 7, thereby controlling the supply amount of the new asphalt mixture to approach the target amount.

In this way, according to the present example, by variably adjusting the amount of new asphalt mixture conveyed by the conveyor 7, the supply amount of new asphalt mixture was controlled to approach the target amount, so that There will be no surplus or shortage of new asphalt mixture supplied to asphalt mixture, and the quality of asphalt pavement can be improved. In addition, since the target amount is calculated and set by multiplying the detected vehicle speed V and the target supply amount per unit length, the new asphalt mixture is supplied per unit length regardless of the vehicle speed. Since the amount can be kept approximately constant without depending on the driver's intuition, the operability of the vehicle can be improved, and the work efficiency of refurbishment and repair can be greatly improved. Furthermore, since the amount of new asphalt mixture supplied is detected by weight, the amount of supplied material can be detected extremely easily.

In this example, the target amount of new asphalt mixture corresponding to the vehicle speed was set from the vehicle speed and the target supply amount per unit length, but for example, the target amount to be supplied per unit length may be set as the target amount. At the same time, the signal from the vehicle speed sensor 31 may be output to the arithmetic circuit 32 for calculation, thereby adjusting the moving speed of the conveyor 7 and the vehicle speed.

(5) Effects of the invention As explained above, this invention comparatively controls the amount of new asphalt mixture supplied to the loosened conventional asphalt mixture so that it approaches the target amount. Since there is no surplus or shortage of new asphalt mixture, the quality of asphalt pavement can be improved, and the supply amount can be adjusted automatically, improving the efficiency of recycling and repair work. Further, since the target amount is changed according to the vehicle speed, the supply amount of the new asphalt mixture can be kept substantially constant regardless of the vehicle speed. Furthermore, since the supplied weight of the new asphalt mixture is detected, the supplied amount can be easily detected.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of the present invention, Figure 2 is a side view of a playback device showing an embodiment of the present invention, Figure 3 is an enlarged view of the main parts of Figure 2, Figure 4 is a control system diagram, FIG. 5 is a block diagram, and FIG. 6 is a sectional view of asphalt pavement for explaining the operation of the device. 1... Regeneration device, 3... Rear wheel, 7... Conveyor, 13
...Screw conveyor, 20...Drag chain, 2
4...Variable speed motor, 24a...Rotational speed sensor, 2
6...Measuring frame, 27...Load sensor, 28
...Control device, 30...Drive circuit, 31...Speed sensor, 33...Comparison/judgment section, 34...Target amount setting section.

Claims (1)

[Scope of utility model registration request] An asphalt pavement regeneration device configured to supply new asphalt mixture to loosened asphalt pavement includes a supply amount adjusting means for variably adjusting the supply amount of new asphalt mixture and a supply weight of the new asphalt mixture. A weight detection means, a vehicle speed detection means for detecting vehicle speed, a target amount setting means for setting a target amount of new asphalt mixture to be supplied according to the detected vehicle speed, and the weight detection means and the setting means. An asphalt pavement characterized by comprising: a comparison and judgment means for inputting a signal and making a comparison and judgment; and a control means for controlling the adjustment means so as to reduce the comparative deviation amount based on the signal from the comparison and judgment means. playback device.