JPS61261504A - Paving material feeder of asphalt finisher - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a supply device for paving materials used for asphalt finishers, base papers, and the like.

"Conventional technology" As is well known, asphalt finishers are
While the vehicle is running, the asphalt mixture (paving material) put into a hopper installed in the vehicle is sent to the rear screw by a pair of feeders on the left and right, where it is spread evenly left and right and then mixed into a pair of feeders. It is leveled with a screed.

``Problems to be solved by the invention'' By the way, in conventional asphalt finishers, there are two workers: an operator who operates the machine, and a screed man who operates the screed. There are complaints that it is necessary, labor intensive, and not economical. For this reason, various tasks associated with road paving are automated,
It is desired that all operations of the asphalt finisher be performed by seven workers (one-man operation).

However, in the case of one-man operation, it is difficult to see inside the hopper installed in front of the traveling vehicle, so even if the asphalt mixture in the hopper runs out, the worker may not notice and the feeder passes through the inside of the traveling vehicle, and the condition of the asphalt mixture in the feeder section is not known, so all the asphalt mixture being conveyed by the feeder is gone and no asphalt mixture is supplied to the screw section. After the asphalt mixture is loaded into the hopper, workers tend to notice it for the first time.
The problem is that it takes a long time to start paving work again, or in the worst case scenario, workers continue to operate the asphalt finisher even when there is no asphalt mix being supplied to the screed. A problem arises in that it interferes with paving work.

The present invention has been made in view of the above circumstances, and its purpose is to quickly determine the presence or absence of paving material in the hopper.
It is also an object of the present invention to provide a paving material supply device such as an asphalt finisher that can stably supply paving materials through reliable detection, speed up paving work, and save labor.

"Means for Solving the Problems" In order to achieve the above object, the present invention provides a pavement material detection device that is provided at the outlet of a hopper and detects the pavement material conveyed by the feeder, and a The vehicle is equipped with a control device that instructs the traveling vehicle to stop and start according to the output of the detection device.

"Operation" In the paving material supply device of the present invention, the presence or absence of the paving material conveyed by the feeder at the outlet of the hopper is detected by the paving material detection device, and if the paving material is not present,
The control device stops the running vehicle.

"Embodiment" Hereinafter, an embodiment of the present invention will be described based on the seventh factor to FIG. 73.

In the figure, 1 is a running vehicle of the asphalt finisher AF, and this running vehicle 1 runs by rotating wheels W using an engine 2 mounted inside the vehicle.
A main clutch hydraulic cylinder (travel stop device) 4 is installed in the transmission 3 connected to the engine 2, and the output shaft of the transmission 3 is connected to a gear via a transmission mechanism 5 such as a chain. It is connected to box 6. This gear box 6 is attached with a speed detector 7 that detects the traveling speed of the traveling vehicle l.

A hopper 8 is installed at the front of the traveling vehicle 1, and the hopper 8 is configured such that its both sides 8a can be opened and closed left and right by a pair of left and right hydraulic cylinders (hopper opening/closing device &) 9. It is [there]. In addition, both sides 8a of the hopper 80
A pair of left and right ultrasonic sensors (hopper side detectors) 10 are provided to detect objects on either side of the hopper 80. Then, from the inside of the hopper 8 to the inside of the traveling vehicle 1, through the front position K of the pair of left and right screens 11 and 12 disposed at the rear of the traveling vehicle 1, the inside of the hopper 8 is A pair of left and right feeders 13 and 14 are installed to convey the input asphalt mixture (paving material).
The asphalt mixture conveyed by these feeders 13 and 14 is uniformly spread in the left and right direction by each of the screws 11 and 12.

Further, a pair of left and right link members 15 are rotatably supported and attached to both sides of the traveling vehicle l, and a pair of left and right leveling arms 16 are attached to the other ends of these link members 15. , whose front ends are rotatably supported by respective pivots 17 and are attached to the K.
Furthermore, each leveling arm 16 is configured to be able to swing up and down within a vertical plane that runs along the longitudinal direction of the traveling vehicle 1. At the rear end of each leveling arm 16,
A pair of screeds 18.18 are provided front and rear behind each of the screws 11.12 and are extendable left and right.
Hanged. Further, the ends of the ronds of a pair of left and right leveling cylinders (hydraulic cylinders) 19 whose base layer is rotatably connected to the frame 1m of the traveling vehicle 1 are rotatably connected to each of the link members 15. These repel link cylinders 190 are expanded and contracted to connect each link member 1.
By rotating the pivot point 5, the pivot shafts 17, which are pivot points of the leveling arms 16, can be raised or lowered from their reference positions.

Further, on the upper surface of the traveling vehicle 1, the hopper 8 side (
#Horizontal) An ultrasonic sensor (in-hopper detector) 20 is installed to detect the presence or absence of a dump truck in the hopper a by emitting K ultrasonic waves. Side warning indicator light 21 and hopper internal alarm indicator light 2
2 is placed. In addition, the hopper 8 of the traveling vehicle 1
A pair of left and right feeder gates 23 for adjusting the amount of asphalt mixture conveyed by each of the feeders 13 and 14 are disposed on the partition wall between the rear end and the rear end, and are movable up and down. A pair of left and right paving material detection devices 24 and 25 are installed in the feeder gate 23 to detect the presence or absence of asphalt mixture inside the hopper 8. In each of these paving material detection devices 24 and 25, a mounting member 28 having a single cross-sectional shape is attached to the lower center of the rear side surface of each feeder gate 23 by bolts 26 and an oak 27. A support shaft 32 is rotatably supported by a support member 30 attached to the seventh attachment piece 28& by a bolt 29, and a support member 31 fixed to the first attachment piece 28b&C of the attachment member 2B, and the support shaft A detection plate 33 in the shape of a letter is fixed at the lower center of the support shaft 32, and a detection piece 34 is fixed at the center of the support shaft 32 at a predetermined angle (obtuse angle) with the detection plate 33.
A first mounting piece 28bK of the mounting member 28 and a limit switch 35 are attached above the detection piece 34, and a first one that contacts the detection plate 33 to regulate the rotation angle of the support shaft 32. Stopper 36 and the detection piece 3
A seventh cost collar 37 that contacts the support shaft 320 and regulates the rotation angle of the support shaft 320 is fixed to the lower part of the support/holding member 30 and the seventh mounting piece 28aK of the mounting member 28, respectively.
Each limit switch 35 is adapted to detect asphalt mixture by having its operating piece 35 & suppressed by each of the detection pieces 34 described above.

A pair of left and right hopper position detection devices 38 and 39 are installed on both sides of the traveling vehicle 1, respectively. These hopper position detection devices 38 and 39 have a symmetrical structure with respect to the center line t of the asphalt finisher AF as shown in FIG. However, the description of the right hopper position detection device 39 will be omitted. This left hopper position detection device 38 is attached to the left side of the traveling vehicle 1 via an L-shaped mounting member 40, and is attached to each operating piece 41a, 42aft cough mounting member 4.
A limit switch 41 for detecting hopper close and a limit switch 42 for detecting hopper close are attached with screws 47 in a state facing both ends of the hopper 8 facing the kneading limit switches 41 and 42, respectively. The rear plate 811m of the left side part 8a, which can be opened and closed, has a single-character-shaped detection piece 45&, which comes in contact with the actuating piece 41aK of the limit switch 41 for detecting hopper closure, through the mounting members 43 and 44, respectively, when the hopper 8 is open. The provided detection member 45 and the actuating piece 42aK of the limit switch 42 for detecting hopper closure
A detection member 46 having a single-shaped detection piece 46m that comes into contact with the hopper 8 when it is in the closed state is attached by a bolt 48. , a pair of left and right composite material amount detection devices 49 and 50 are installed, respectively. These mixed material amount detection devices 49.50 are
The mounting arms 52 and 52 are inserted into the inside of the cylindrical mounting members 51 and 51 fixed to the upper surfaces of the left and right pair of leveling arms 16 and 16, respectively.
, 16 are attached by bolts 53 and nuts 54, respectively, and an arm clamp member 5 is attached to the tip of each mounting arm 52, 52.
When the lower cylindrical parts 55a, 55a of 5.55 are fitted with bolts 53 and nuts 54, and are directly fired into the lower cylindrical parts 55a, 55a, the lower cylindrical parts 55m, 55 The upper cylindrical parts 55b, 55bK and support rods 56, 56 integrally fixed to the upper surface of a are inserted through and fixed by washers 57 and split pins 58, while the rear side of the table support rods 56, 56 is inserted. Detection boxes 59 and 60 are fixed to the ends of the support rods 56 and 60, respectively.
A mounting block 61.61 is fitted into the front end of 56 and fixed by a port 62 and a nut 63,
Furthermore, a detection paddle 64.6 is attached to the I&mounting block 61.61 in a state perpendicular to each of the support rods 56.56.
4 are inserted and fixed by bolts 62 and nuts 63, respectively. Each detection box above 59.6
In order to detect the angle of each detection paddle 64, 64, lower limit mercury switches 65, 65 are fixed to the upper part of each detection box 59, 60, and 1 upper limit mercury switch 66, 66 is installed inside the box. is rotatably attached to the center of each detection box 59, 60 by one operating mechanism 67, 67, and by rotating each upper limit mercury switch 66, 66,
By adjusting the difference in mounting angle that occurs between each lower limit mercury switch 65.65 and each upper limit mercury switch 66,66, there is a dead band (dead band) when detecting the angle of each detection paddle 64, 64. ) is requested to be adjusted.

Furthermore, on the right side of the first part of the asphalt finisher AFolif, the driving reference line laid on the road surface is detected by three optical sensors arranged in parallel in the direction perpendicular to the driving reference line.
A steering position detection device 68 for detecting the position of the asphalt finisher AF is mounted via a support member 69. In addition, the above asphalt finisher A
The FK includes a vehicle body inclination angle detector 70 that is installed at a predetermined position at the rear of the vehicle 1 in order to automatically measure pavement thickness, and detects the inclination angle of the vehicle 1 in the longitudinal direction with respect to a horizontal reference plane. , from the road surface at a pair of left and right reference points (axis centers of rotational shafts 71) of the traveling vehicle l, which are provided behind the pivot shafts 17 of each of the level link arms 16 and located at the same height as the reference positions of the respective pivot shafts 170. a pair of left and right vehicle body height detectors 72 that detect the height of the vehicle body height detectors 72; A pair of arm inclination angle detectors 73 are provided in the vicinity of each of the warning indicator lights 21 and 22 and between the front end of each leveling link arm 16, and between the pivot 17 of each leveling link arm 16 and the traveling vehicle. 1
A pair of upper and lower arm height detectors 74 are provided for detecting the vertical distance between each i point (axis center of the rotating shaft 71), that is, the vertical displacement of each pivot 170 from the reference state.

The output signals of each of the hopper side detectors 10, the in-hopper detector 20, the left and right paving material detection devices 24, 25, and the left and right mixed material amount detection devices 49,50 are as shown in the second diagram.
The central processing unit fit (CPU)'17VC is input through the I10 interface (input/output interface) 76 on the input side of the control device 75, respectively, and based on these output signals, the central processing unit 77 automatically performs The mixed material supply process is carried out, and a command signal according to the result is sent to the left and right screws 11.12 and the left and right feeders 13.14 via the I10 interface 7B on the output side.

The left and right screw drive devices 79 and 80 and the left and right feeder drive devices 81 and 82 are moved by hydraulic device vanes.

84, an electromagnetic switching valve incorporated in the hydraulic device 85 that operates the traveling stop device 4, and an electromagnetic switching valve incorporated in the hydraulic device 86tC that operates the hopper opening/closing device 9, respectively. It is designed to be output. In addition, the output signals from the three original sensors of the steering position detectors 700 are input to the control device 75, so that the control device 75 can control the steering wheels Cm of the traveling vehicle l.
The direction of the steering wheel W is automatically controlled by controlling the operation of a hydraulic cylinder that moves the steering wheel W via a steering rod. Furthermore, each of the detectors 70, 72
, 73.74, that is, the inclination angle 'Os of the vehicle 10 in the longitudinal direction with respect to the horizontal reference plane, the height Hos of the left and right reference points of the vehicle 1 from the road surface, Hos from the reference state of each leveling arm 16 above. The inclination angle θ11 in the longitudinal direction of
l and each level link arm 1 input in advance
Based on the effective length of 6, the inclination angle 02 of each repel link arm 16 in the standard state, and the height AK of each screed 18,
The above control device controls the left and right pavement thickness t1 t=Ho+H1+Ltdn Ce 1+02-θo)
-A is calculated, and the pavement thickness is automatically measured and displayed.

Next, the operation of the paving material supply device configured as described above will be explained based on a flowchart K in FIG. 73 showing the processing contents of the control device 75.

First, under normal conditions in which there is sufficient asphalt mixture inside the hopper 8, step 5PI (as shown in
The control device 75 sends a composite material supply command signal to each hydraulic device 83.
Accordingly, since each screw drive device 79.80 and each feeder drive device 81.82 drive each screw 11.12 and each feeder 13.14, the asphalt mixture inside the hopper 8 is attached to each feeder 13, 14 [each screw 11 at the rear of the traveling vehicle 1]
．． Transported to position 12, each screw ■.

12, it is spread evenly from side to side, and then spread evenly by a pair of left and right screeds 18.18.

In this state, when the control device 75 determines the output signal of each pavement material detection device 24.25 as shown in step SP2, the asphalt mixture being conveyed by each feeder 13.14 is detected at each feeder gate 230. The detection plate 33 of the pavement material detection device 24.25 provided at the bottom is rotated counterclockwise around the support shaft 32 as shown in FIG.
The detection piece 34 fixed to this support shaft 32 is rotated counterclockwise, and the actuation piece aS of the limit switch 35 is rotated.
Since the actuating piece 35m is rotated clockwise around its support shaft by pressing S, the control device 75 detects whether the asphalt mixture is in contact with the ON signal pressure of each paving material detection device 24.25. Determining that it is in hopper 8, step SP
As shown in FIG. 3, the output signals from each of the mixed material amount detection devices 49 and 50 are discriminated.

At this time, if less than the required amount of asphalt mixture is accumulated at the end of each screw 11.12, the detection paddle 64.64 of each mixture amount detection device 49.50
When υ falls below a predetermined angle, each mixed material amount detection device 49
．． 50 is in the off state, the control device 75
Returning to step SP2, each pavement material detection device 24
, 25 is performed. On the contrary,
If more than the required amount of asphalt mixture accumulates at the end of each screw 11.12, each mixture amount detection device 49.50
If the detection paddle 64 is at a predetermined angle or more,
Since each mixed material amount detection device 49.50 is in the ON state, the control device 75 sends a command to each hydraulic device 83.84, as shown in step SP4, and each screw drive device 79.80 and The drive of each screw 11.12 and each feeder 13.14 by each feeder drive device 81.82 is stopped, and the supply of asphalt mixture is stopped.

Then, as shown in step SP5, the control device 75 monitors the output signals of the respective composite material amount detection devices 49 and 50, and
Wait until the amount of asphalt mixture at the end of each screw 11, 12 becomes less than the required amount. When it becomes less than the required amount, as shown in step 5PIK, a command is sent to each hydraulic device 83, 84 again, and each screw 11 .12 and each feeder 13
．． 14 starts supplying the asphalt mixture 2. If there is asphalt mixture inside the hopper 8 under such pressure, the control device 75 performs step SP2. SP3
Processing loop LP1 (each screw 11.1
(the amount of asphalt mixture at the end of step 2 is less than the required amount), or processing loop LP2 consisting of steps SPI to SP5
(The amount of asphalt mixture at the end of each screw 11, 12 is more than the required amount) is repeated, but when there is no more asphalt mixture inside the hopper 8, each paving material detection device 24.
25 detection plates 33 are shown in FIG.
Rotate clockwise around 2 and press the switch 3.
Each paving material detection device 24.2 is rotated clockwise by the detection piece 34 in contact with the operating piece 35aK of No. 5.
The output signal of No. 5 is turned off. As a result, the control device 7
5, in step SP2, each pavement material detection device 2
4. Check that the 250 output signal is in the off state,
Proceed to step SP6. In step SP6, the timer function of the central processing unit 77 of the control device 75 is used to time the OFF state of each of the paving material detection devices 24°250. Then, as shown in step SP7, the control device 75 performs a preset period of time (for example, 10 seconds).
If each paving material detection device 24, 25 returns to the ON state before the set time elapses, the normal processing indicated by the processing loops LPI and LP2 is resumed. Further, if each of the paving material detection devices 24 and 25 remains in the off state even after the set time has elapsed, it is determined that there is no asphalt mixture in the hopper 8, and the control device 75 uses the hydraulic device 85 to The running stop device 4 is activated to stop the running of the running vehicle l, and each screen 5-11.1
2 and each feeder 13, 14 are stopped to stop supplying the asphalt mixture to the screed 18 side. (See step SP8.) Next, as shown in step SP9, the control device 75 determines the output signal of the in-hopper detector 20, and indicates that the output signal of the in-hopper detector 20 is in the OFF state, that is, dumping from the inside of the hopper 8. Wait until the truck is ready to leave. In this case, while the in-hopper detector 20 is on, the control device 75 turns on the in-hopper alarm indicator light 20, stops the operation of the hopper opening/closing device 9, and prohibits the hopper 8 from closing (interlock )do.

Subsequently, when the hopper detector 20 is turned off,
The control device 75 outputs a command to the hydraulic device 86, and the hopper opening/closing device 9 closes both sides 8a of the hopper 80, causing the asphalt mixture remaining on both sides 8a to fall onto each feeder 13, 14 ( (see step 5 PIO), the output signal of each hopper side detector 100 is determined as shown in step 5 PlII/c. At this time, if the hopper side detector lO is in the on state, the control device 75 turns on the hopper side alarm indicator light 21 and stops the operation of the hopper opening/closing device 9 until the hopper side detector lO is in the on state. and prohibits the hopper 8 from opening (interlock). and,
When the hopper side detector 10 is turned off, the control device 7
5 operates the hopper opening/closing device 9 via the hydraulic device 86 to open the hopper 8, as shown in step 5P12.

Next, in step A, when the worker guides a new dump truck loaded with asphalt mixture and presses the start switch after the asphalt mixture has been put into the hopper 8, the control device 75 1 (see step 5P13), returns to step SPY, and resumes normal composite material supply processing.

In this way, each detection device 24. 25. 49°5
0 and the output signal of the detector 10.20, if there is asphalt mixture inside the hopper 8, the control device 75 automatically and stably performs the normal mixture supply process. 1 If there is no more asphalt mixture in hopper 8, immediately use asphalt finisher AF.
To stop the running of a car and to supply asphalt mixture to the rear, and to safely and reliably perform the supply work of new asphalt mixture, so that the work of supplying the mixture can be resumed promptly.

In the above embodiment, the functions of the pair of left and right composite material supply devices have been explained simultaneously, but it goes without saying that both can be controlled individually and independently.

"Effects of the Invention" As explained above, the present invention includes a pavement material detection device that is provided at the outlet of a hopper and detects paving material conveyed by a feeder, and a , and a control device that commands the stop and start of the running vehicle.The pavement material detection device detects the presence or absence of paving material being conveyed by the feeder at the exit section, and if there is no paving material, the system detects the presence of the paving material being conveyed by the feeder. , the control device can stop the running of the vehicle], the presence or absence of paving material in the hopper can be quickly and reliably detected, the supply of paving material can be stabilized, and paving work can be speeded up. ,
It has an excellent effect of being able to save labor.

[Brief explanation of the drawing]

Figures 2 to 73 show an embodiment of the present invention, in which Figure 1 is a plan view of an asphalt finisher, Figure 2 is a side view of the asphalt finisher, Figure 3 is an explanatory diagram of the feeder gate section, 9 is a sectional view taken along line IV-IV in FIG. 3, FIG. 5 is an explanatory diagram of the hopper position detection device, FIG. 6 is an enlarged explanatory diagram of the hopper position detection device, and FIG. 7 is a sectional view of the hopper position detection device.
A cross-sectional view along the line ■-■@ in the figure, Figure 9 is a plan view of the mixed material amount detection device, Figure 9 is a cross-sectional view along the IK-IK line in Figure g,
Figure 1O is a sectional view taken along the line X-X@ in Figure 9, Figure 1/ is a cross-sectional view of XI-X[4mK85 in Figure 1O, and Figure 7 is a schematic configuration of the mix material supply control system of the asphalt finisher. FIG. 73 is a flowchart. l... Running vehicle, 8... Hopper, 13
...Left feeder, L4...Right feeder, 18...Screed, 24...Left pavement material detection device, 25...Right pavement Material detection device, 75... Control device. Figure 4 j 9ri Figure 7 Figure 11

Claims (1)

[Claims] In a paving material supply device such as an asphalt finisher, which supplies paving material into a hopper provided in a traveling vehicle and sends this paving material to a leveling device by a feeder to perform paving, it is provided at the outlet of the hopper. a pavement material detection device that detects the paving material that is conveyed by the feeder;
A paving material supply device such as an asphalt finisher, comprising a control device for commanding the stop and start of the traveling vehicle.