JP2977257B2 - Garbage truck loading control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a loading control device for a refuse collection vehicle.

(Prior art) A device for measuring or detecting the loading state of a garbage truck and displaying the result, or interlocking when the loading amount reaches a predetermined amount to prevent excessive loading, Previously known. Several methods have been proposed as methods for measuring or detecting the amount of refuse loaded. For example, Akira Kai
As disclosed in JP-A-63-32807 and JP-A-1-164205, a method of measuring the weight to detect the loading amount, and a method for detecting the loading amount in a garbage collection box disclosed in JP-B-59-35445. There are a method of detecting the loading amount from the position of the garbage, and a method of detecting the loading amount by measuring the pressure in a hydraulic circuit that drives the push plate as disclosed in Japanese Utility Model Laid-Open No. 1-180403. In addition, there has been proposed a method of measuring the number of times garbage is loaded and the time spent for loading, and estimating the loading amount from these values.

(Problems to be Solved by the Invention) However, conventionally, it has not been possible to measure the loading amount with high accuracy by any of the methods. In the method of measuring the weight of garbage, the reliability of the measured value is low because a measuring device corresponding to the method of loading garbage has not been developed. For this reason, only the measurement value is displayed, and other methods can measure only dust within a specific range of the dust collection box, and cannot accurately detect the loading amount.

The present invention has been made in view of the above circumstances, and has as its object to provide a load control device for a refuse collection vehicle that can detect the load of garbage with high accuracy in consideration of the specific gravity of garbage and prevent excessive loading. And

[Configuration of the invention]

(Means for Solving the Problems) The present invention provides a collection box mounted on a vehicle body, a discharge plate which is mounted in the collection box, and which is moved forward and backward by a hydraulic cylinder which releases a reverse hydraulic pressure equal to or more than a predetermined value; A dust box connected to the rear of the collection box, into which dust is to be thrown, and a loading device arranged in the throw box and a loading device that compresses the thrown dust and loads the dust into the collection box. A loading control device mounted on the loading device to control the loading device, comprising: a pressure sensor that detects a pressure of a hydraulic cylinder that drives the loading device; a pressure in a pushing process, a duration thereof, and a time integration of the pressure. Output means for determining that the load has reached the predetermined load amount and outputting a determination result when the value reaches a predetermined range as a value at the time of the predetermined load amount. Features.

The present invention also provides a collection box mounted on a vehicle body, a discharge plate which is mounted on the collection box, and which is moved forward and backward by a hydraulic cylinder which releases a reverse hydraulic pressure equal to or more than a predetermined value, and a dust connected to a rear portion of the collection box. The loading device is mounted on a garbage truck equipped with a loading box, and a loading device that is disposed in the loading box and compresses the loaded trash and loads the waste into the collection box. A loading control device for controlling, a pressing frequency counting means for counting the number of times dust is pressed into the collection box, and a pressure for outputting a signal when a pressing pressure of a hydraulic cylinder of the loading device becomes a predetermined value or more. While the number of presses counted by the switch and the number of presses counting means is equal to or less than a predetermined number, the loading amount is determined based on the number of presses, and when the number of presses exceeds the predetermined number, the pressure switch is used. of Using the time the output is sustained serial pressure signal, characterized by comprising a determining means for loading amount by applying a correction to said predetermined number of times.

(Operation) The judging means compares the predetermined judgment reference data with the input pressure signal, judges the amount of dust loaded, and outputs the result. Since the oil pressure in the hydraulic pipeline changes with the increase in the amount of garbage loaded in the process of pushing the garbage, the determination amount reference data is determined in advance based on the relationship between the amount of garbage and the oil pressure. And the pressure signal from the pressure sensor, it is possible to accurately determine the loading amount.

When the criterion data is composed of the hydraulic pressure, the duration, and the time integral of the hydraulic pressure, these values increase as the loading amount increases.

When the pressure switch, the number-of-presses counting means, and the determination means are provided, the number of times the loading device has pressed the dust, and the pressure in the hydraulic pipeline becomes a predetermined pressure or more during the pressing process, and a pressure signal is output. The loading amount is determined from the determined duration. In the pushing process, as described above, the pressure in the hydraulic pipeline increases as the loading amount increases. When the loading amount reaches a predetermined amount, the oil pressure reaches the predetermined pressure and the pressure signal is output from the pressure switch. When the loading amount further increases, the time for which the oil pressure continues to be equal to or higher than the predetermined pressure increases. Therefore, the time during which the output of the pressure signal is maintained also increases. Therefore, it is possible to accurately determine the loading amount by changing the number of times of loading based on the duration.

Here, the determination means, while the number of presses is less than a predetermined number,
The loading state of the dust is determined based on the number of times of pressing, and when the number of pressings exceeds a predetermined number, the amount of the dust is corrected by performing a correction to the predetermined number of times while the output of the pressure signal from the pressure switch is maintained. By making the determination, the determination can be made with high accuracy.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, FIG. 2 shows the appearance of a refuse collection vehicle to which the first embodiment can be applied. A loading device for loading dust is accommodated in a tailgate 48 connected to the rear of the dust collection box 38. In this loading device, as the outside cylinder 24 and the inside cylinder 22 sequentially expand and contract, the upper panel 31 slides up and down, and the lower panel 32 swings in the left-right direction.

This outside cylinder 24 and inside cylinder 22
FIG. At the time when loading is started (FIG. 3 (a)), the upper panel 31 moves along the direction of the arrow A1 and is positioned above the lower panel.
Reference numeral 32 is reversed in the direction of arrow A2 and located rearward. From this state, the upper panel 31 descends along arrow A3,
The lower panel 32 rotates in the direction of arrow A4 (FIG. 3 (b)). By the rotation of the lower panel 32, dust is scraped, compressed, and crushed (FIG. 3 (c)). From this state, the upper panel 31 rises in the direction of arrow A1, and the dust is pushed into the dust collection box 73 located on the left side in the figure (FIG. 3 (d)).

Here, the outside cylinder 24 and the inside cylinder 22 are driven by a hydraulic cylinder circuit shown in FIG. An oil tank T and a hydraulic pump 26 driven by a traveling engine of the vehicle are provided. This hydraulic pump
Electromagnetic switching valves V1 to V5 are connected in parallel to 26 via a hydraulic pipe 27, respectively. The electromagnetic switching valve V1 controls the operation of the discharge cylinder 21, and the electromagnetic switching valve V2 controls the inside cylinder 22. The electromagnetic switching valve V3 controls the lift cylinder 23, and the electromagnetic switching valve V4 controls the outside cylinder 24. The electromagnetic switching valve V5 controls the automatic lock cylinder 25. These solenoid-operated switching valves V1 to V5 are connected to solenoids SOLa1 and SOLb1 and SOLA1, respectively.
2 and SOLb2, SOLa3 and SOLb3, SOLa4 and SOLb4, SOLa5
have. Each electromagnetic switching valve V1 ~ V5 and hydraulic pump
26 is connected by a hydraulic pipe 27. And hydraulic pipe
27, a relief valve PR1 that releases the oil pressure when the discharge-side oil pressure of the discharge cylinder is equal to or higher than a predetermined value, and releases the oil pressure when the suction-side oil pressure of the inside cylinder is equal to or higher than a predetermined value A pressure switch PS1 that opens and closes by hydraulic pressure inside a hydraulic pipe 29 connected to a relief valve PR2 and an electromagnetic switching valve V2, and a pressure switch PS2 that opens and closes by hydraulic pressure of a hydraulic pipe 28 connected to an electromagnetic switching valve V4, respectively. Is provided.

In the first embodiment, a pressure sensor 1 for measuring a hydraulic pressure P of this portion is provided at a portion of the hydraulic pipe 27 connected to the hydraulic pump 26. The loading control device of the refuse collection vehicle of the first embodiment operates based on the oil pressure detected by the pressure sensor 1.

 FIG. 1 shows the configuration of the first embodiment.

The pressure sensor 1 operates by being supplied with power from power supplies built in a control circuit 2 for controlling the operation of the loading device through power lines 3 and 4. The output end of this pressure sensor 1 is A /
The input terminal of the D converter 6 is connected to the input terminal of the microcomputer 7, and the output terminal of the A / D converter 6 is connected to the input terminal of the microcomputer 7. The microcomputer 7 is supplied with power from a power supply inside the control circuit 2 through power supply lines 11 and 12.
One of the output terminals of the microcomputer 7 is connected to one end of the full indicator light RL, the other output terminal is connected to the input terminal of the loading status indicator 8, and the other output terminal is connected to the control circuit 2. Is connected to one end of the coil 10 of the interlock relay IR. Here, the other end of each of the full indicator light RL and the coil 10 is grounded. The relay contact 10a of the interlock relay IR is connected to the control circuit 2, and a command to interlock is given to the control circuit 2 by opening and closing the contact 10a.

Next, the operation of the loading control device having such a configuration will be described. The hydraulic pressure detected by the pressure sensor 1 is input to the A / D converter 6 as a hydraulic pressure signal. A / D converter 6
Operates according to the procedure shown in the flowchart of FIG. The hydraulic pressure signal input in the form of an analog signal is converted into a digital signal (steps 101 and 102), and the hydraulic pressure signal is output in the form of a digital signal (step 10).
3). The output hydraulic pressure signal is provided to the microcomputer 7. The microcomputer 7 uses this oil pressure signal to determine stepwise what percentage of the garbage is loaded. The result of this determination is displayed on the loading status display 8, and 100
%, The full indicator light RL is turned on, and at the same time, the relay coil 10 of the interlock IR is excited, the relay contact 10a is opened, and the loading operation of the control circuit 2 is stopped. Give a command.

The setting of a reference required when the microcomputer 7 performs the determination operation will be described. FIG. 6 shows how the temporal change of the hydraulic pressure in each loading process changes as the loading amount increases. FIG. 6 (a) shows a case where the loading amount is 0%, and FIG. 6 (b) shows a case where the loading amount is 50%.
FIG. 6 (c) shows the case where the loading amount is 80%, and FIG. 6 (d) shows the case where the loading amount is 100%, that is, when the loading amount is full. The loading process is composed of four steps of reversing, lowering, scraping and pushing, as described with reference to FIG.

Taking the case where the loading amount is 0% as an example, the hydraulic pressures when performing inversion, descending, scraping, and pushing are 43 kg and 33 kg, respectively.
Kg, 20Kg, and 20Kg, and the duration of each process was 1.6 seconds, 3.0 seconds, 1.9 seconds, and 4.3 seconds, requiring a total of 10.8 seconds. As the loading amount increases, the oil pressure and the duration in the scraping process and the pushing process increase. In particular, in the pushing step, in addition to the increase in the hydraulic pressure and the duration, it is seen that the pressure waveform changes to a trapezoidal shape, and the value obtained by integrating the hydraulic pressure with the duration increases. For example, when the loading amount reaches 80% (FIG. 6 (c)), the hydraulic pressure in the outside cylinder 24 in the pushing process is 110 kg, the duration is 3.8 seconds, and the integral value is 41 kg.
8Kg · s. These three numerical values increase as the loading amount increases. Therefore, if a standard is set for each of these numerical values for each stage, and the standard value and the measured value are compared to determine the loading amount, accurate determination can be performed even when all kinds of dust are loaded.

Next, in the procedure of the determination operation, the hydraulic pressure P _{n + 1} at the minute time t _{n + 1} shown in the flowchart of FIG. 7 is replaced with the hydraulic pressure P _n as a new value (step 201). Also,
The integral value P _{n + 1} × t _{n + 1} at the minute time t _{n + 1} is replaced with P _n · t _n as a new integral value (step 202). Each reference value set in advance for determining the garbage loading amount is stored in the internal memory of the microcomputer 7 and read into the CPU for making the determination (step 203). Each reference value of the hydraulic pressure, the duration, and the integral value includes a minimum value and a maximum value, and is provided for each stage. 50% loading
The minimum value of the hydraulic pressure at the time of is P _nL1 , the maximum value is P _nH1 ,
The minimum value of the duration is _{Δt nL1} , the maximum value is _{Δt nH1} , the minimum value of the integral value is ΔP _n · t _nL1 , and the maximum value is ΔP _n · t _nH1, and these reference values are read into the CPU.

First, it is determined whether or not the amount of loaded garbage has reached 50%. It is determined whether or not the hydraulic pressure _Pn is within the range of not less than the minimum value _{PnH1 and not} more than the maximum value _PnH1 (step 204). If so, go to the next step. It is determined whether or not the duration _{nt n} is within the range between the minimum value _{Σt nL1} and the maximum value Σ _nH1 (step 205). If it is out of the range, the operation is continued. move on. Integral value ΣP _n・ t _n
Is outside the range between the minimum value ΔP _n · t _nL and the maximum value ΔP _n · t _nH , the operation is continued. If the integral value is within this range, it is determined that the loading amount has reached 50%, and 50% is displayed on the loading state display 8 (step 207).

Next, it is determined whether or not the loading amount has reached 80%.
In the same manner as when the determination of 50% is made, the hydraulic pressure P _{n + 1} at the minute time t _{n + 1} is input as the hydraulic pressure P _n (step 20).
8) The integral value P _{n + 1} × t _{n + 1} at the minute time t _{n + 1} is input as the integral value P _n · t _n (step 209). As the reference value, the minimum value of the hydraulic pressure when the loading amount is 80%
P _nL2, the maximum value P _{nH2, nL2} the minimum value of the duration Σ, the maximum value Σ _nH2, minimum value Σ _n · t of the integral value _{nL2, ΣP} the maximum value _n
・ T _nH2 and _load them into the CPU (step 21
0).

Oil pressure P _n is, determines whether or not within the maximum value P _nH2 the range with a minimum value P _nL2 above (step 211), in the case of out of range continues to operate as less than 80%, If so, go to the next step. Duration Σt _n is minimum 最小
It determines whether the _nL2 and within the maximum value .SIGMA.t _nH2 (step 212), the process proceeds to the next step if the time is outside the range that is within the range continues to operate. Integrated value ΣP _n · t _n is determined whether it is within range of the minimum value ΣP _n · t _nL2 and maximum ΣP _n · t _nH2 (step 213), continue to operate when out of range. When the integrated value is within this range, it is determined that the loading amount has reached 80%, and the loading state display 8 displays 80% (step 214).

Finally, it is determined whether or not the loading amount has reached 100%. Enter the oil pressure P _{n + 1} at the minute time t _{n + 1} as a hydraulic force P _n (step 215), the integral value at short time t _{n + 1} P
Input _{n + 1} × t _{n + 1} as the integral value P _n · t _n (Step 2
16). Also, as the reference values, the minimum value of the oil pressure when the loading amount is 100% is P _nL3 , the maximum value is P _nH3 , the minimum value of the duration is _{Σt nL3} , the maximum value is _{Σt nH3} , and the minimum value of the integral value is ΣP _n
T _nL3 , and the maximum value is ΔP _n · t _nH3, and these are taken into the CPU (step 217).

It is determined whether or not the hydraulic pressure _Pn is in the range of not less than the minimum value _{PnL3 and not} more than the maximum value _PnH3 (step 21). If it is within the range, proceed to the next step. It is determined whether or not the duration _{Σt n} is within the range between the minimum value _{Σt nL3} and the maximum value _{Σt nH3} (Step 2 child 19). If it is out of the range, the operation is continued. Proceed to step. Integral value ΣP _n
t _n is determined whether it is within range of the minimum value _{ΣP n} · t nL3 and maximum _{ΣP n} · t nH3 (step 220), continue to operate when out of range. If the integrated value is within this range, it is determined that the loading amount has reached 100%, and 100% is displayed on the loading state display 8 (step 221). Further, the full indicator light RL is turned on (step 222), and the relay coil 10 of the interlock IR is excited to make the relay contact 10a.
And instructs the control circuit 2 to stop the loading operation. As a result, the loading operation is automatically stopped (step 223), and safety is ensured.

As described above, according to the present embodiment, since the hydraulic pressure, the duration, and the integrated value of the hydraulic pressure and the duration in the pushing process change with the increase in the loading amount, the loading amount is determined and the specific gravity is determined. , It is possible to make a highly accurate determination and accurately prevent overloading.

Next, a second embodiment of the present invention will be described. In this embodiment, the hydraulic pipe 27 of the hydraulic circuit shown in FIG.
A pressure switch is provided instead of the pressure sensor 1. This pressure switch closes when the hydraulic pressure in the hydraulic pipe 27 becomes equal to or higher than a predetermined pressure, and outputs a pressure signal.

FIG. 8 shows a configuration of a loading control device according to the present embodiment including the pressure switch 301. The output terminal of the pressure switch 301 is connected to the program controller 303.
The output terminal of the program controller 303 is connected to a loading status indicator 302, a control circuit 304 for controlling the operation of the loading device, and one end of a relay coil 306 of the interlock RL and one end of a full indicator light RL. I have. The other ends of the relay coil 306 and the full indicator light RL are grounded. The relay contact 306a of the interlock relay IR is connected to the control circuit 304, and an interlock command is given to the control circuit 304 by opening and closing the contact 306a.

The control circuit 304 outputs a dust loading signal each time the loading device pushes dust into the dust collection box, and the signal is supplied to the program controller 303 via the signal line 307. The number of times the garbage loading signal is given is determined by the program controller 303.
Is counted, and based on the counted number and the duration during which the pressure switch 301 continues to output the pressure signal, the loading amount is determined and the excess loading is prevented.

Here, the output of the pressure signal from the pressure switch 301 and
There is the following relationship with the loading amount. FIG. 9 shows how the hydraulic pressure changes with time in each process as the loading amount increases. The measured values are slightly different from the graph shown in FIG. FIG. 9 (a) shows a case where the loading amount is 0%, FIG. 9 (b) shows a case where the loading amount is 50%, and FIG. 9 (c).
FIG. 9 (d) shows the case in which it has reached 100%, respectively. As described with reference to FIG. 6, the loading process includes four steps: inversion, lowering, scraping, and pushing.

Focusing on the hydraulic pressure in the pushing step, the pressure increases with an increase in the loading amount. Assuming that the maximum value of the oil pressure when the loading amount reaches 50% (FIG. 9 (b)) is, for example, 80 kg, when it is 80% (FIG. 9 (c)), The level lasts for a certain time and becomes 100% (FIG. 9 (d)). The level of 80 kg or more is maintained for a longer time.

Therefore, it is set so that when the oil pressure reaches 80 kg or more, the pressure switch 301 is closed and a pressure signal is output. Until the loading amount reaches 50%, it is converted into the loading amount based on the number of times garbage is put in, and when it exceeds 50%, the oil pressure is 80 kg
Is converted based on the time exceeding.

Specifically, it is assumed that the garbage is filled up after 100 times of refuse input. The output of the dust loading signal is counted 50 times, and when the pressure signal is not output from the pressure switch 301, the loading amount is converted as 50%. If the count is performed 50 times and the output of the pressure signal continues for 1 second, the count is corrected by 2 and the loading amount is set to 52%. The output of the garbage loading signal is counted 95 times, and when the pressure signal continues for 1 second, the count is corrected by 2 counts and the loading amount is 97%. If the output of the pressure signal continues for 2 seconds after counting 95 times, it is determined that the output has reached 100%. If the time during which the pressure signal is output for one second after counting 100 times is 98%, the duration is 2%.
It is assumed to be 100% over seconds.

Such determination and the operation of preventing excessive loading are performed in the following procedure. In FIG. 8, the control circuit 304
Each time the loading device puts dust into the dust input box, a dust loading signal is input to the program controller 303.
The program controller 303 counts the number of times the garbage loading signal is input, converts this number into a garbage loading amount, and causes the loading state display 302 to display the percentage as a percentage.

When the load exceeds 50%, the pressure switch 301 closes,
A pressure signal is output. The program controller 303 measures the time during which the pressure signal is continuously output, converts the loading amount based on this time, and causes the loading state display 302 to display the conversion.

When it is determined that the loading amount has reached 100%, the full indicator light RL
Is turned on to excite the coil 305 of the interlock relay IR to open the contact 306a. Accordingly, a command to stop loading is given to the control circuit 304, and the operation of the loading device stops.

As described above, according to the second embodiment, similarly to the first embodiment, highly accurate determination and prevention of excessive loading can be performed without being affected by the type of dust.

The first and second embodiments described above are examples, and do not limit the present invention. The second applicable garbage truck is
It goes without saying that the present invention is not limited to the one shown in the figure. For example, the present invention can be applied to a refuse collection vehicle as shown in FIG. This is different from that shown in FIG. 2 in that the loading of dust is performed by the swinging of the pushing plate 62 and the rotating operation of the rotating plate 63.

At the start of loading, as shown in FIG. 11 (a), the push plate 62 is retracted in the direction of arrow B2 as a reversing operation, and the rotating plate 63 is rotated in the direction of arrow B1. Then push plate
62 stops at the rearmost position as shown in FIG. 11 (b), and the rotating plate 63 continues to rotate. By the rotating operation of the rotating plate 63, dust is scraped and compressed. The rotating plate 63 is
11C stops at the position shown in FIG. 11C, and the pushing plate 62 pushes the dust scraped up on the rotating plate 63 in the direction of arrow B3.

The operation of the pushing plate 62 is controlled by a ram cylinder 79, and the rotating plate 63 is controlled by a hydraulic motor (not shown). The ram cylinder 79 and the hydraulic motor operate by a hydraulic circuit as shown in FIG.

An oil tank T and a hydraulic pump 94 driven by a traveling engine of the vehicle are provided. An electromagnetic switching valve V11 is connected to the hydraulic pump 94 via a hydraulic pipe 95. The electromagnetic switching valves V12, V13 and V14 are connected in series by a hydraulic pipe 96, respectively, so as to be in parallel with the electromagnetic switching valve V11. Solenoid switching valve V11 is automatic lock cylinder 75
The electromagnetic switching valve V12 controls the dump cylinder 70, and the electromagnetic switching valve V13 controls the ram cylinder 79.
, And the electromagnetic switching valve V14 controls the rotation of the hydraulic motor M. Then, similarly to the hydraulic circuit shown in FIG. 4, in the first embodiment, the pressure sensor 1 is provided in the hydraulic pipe 95,
In the second embodiment, the pressure switches 301 may be provided.

As described above, the loading control device of the present invention is not limited to the type of refuse collection vehicle, and can be widely applied.

〔The invention's effect〕

As described above, the garbage collection vehicle loading control device of the present invention detects the oil pressure in the pushing process that increases with an increase in the amount of garbage loaded by the pressure sensor, and determines predetermined reference data for determination. By determining by comparing with the hydraulic pressure, the loading amount can be determined with high accuracy.

Further, the same effect can be obtained even if the determination is made based on the number of times garbage is thrown in and the time during which the oil pressure has maintained a predetermined pressure or more in the pushing process.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a configuration of a refuse collection vehicle loading control device according to a first embodiment of the present invention, and FIG. 2 is a front view showing an external configuration of a refuse collection vehicle to which the present invention can be applied. FIG. 3, FIG. 3 is a process diagram showing the operation of loading the garbage by the garbage truck, FIG. 4 is a circuit diagram showing a configuration of a hydraulic circuit of the garbage truck, and FIG. In the indicated loading control unit
FIG. 6 is a flowchart showing the procedure of the A / D conversion operation, FIG. 6 is a graph showing a change in hydraulic pressure with respect to time during the loading operation detected by the loading control device, and FIG. A flowchart showing a procedure for determining the loading amount,
FIG. 8 is a circuit diagram showing a configuration of a garbage collection vehicle loading control device according to a second embodiment of the present invention, and FIG. 9 is a diagram showing a case where the garbage collection vehicle shown in FIG. 2 performs loading. FIG. 10 is a front view showing the external configuration of another refuse collection vehicle to which the present invention can be applied, and FIG. 11 is an operation of the refuse collection vehicle loading garbage. FIG. 12 is a circuit diagram showing a configuration of a hydraulic circuit of the refuse collection vehicle. 1 ... Pressure sensor, 2,304 ... Control circuit, 3,4,11,12 ...
Power line, 6 A / D converter, 7 Microcomputer, 8,302 Loading status display, 10,306 Interlock relay coil, 10a, 306a Interlock relay contact, 21 Discharge cylinder , 22 ... Inside cylinder, 23 ... Lift cylinder, 24 ... Outside cylinder, 25 ... Automatic lock cylinder, 26, 94 ... Hydraulic pump, 27, 95, 96 ... Hydraulic pipe, 31 ... Upper panel , 32 ...
… Lower panel, 33,65 …… garbage truck, 34,66 …… PT
O Operation lever, 36,68… PTO, 35,67… Operation cable, 37… Switching valve, 38,73… Dust collection box, 39…
… Discharge link, 40 …… Discharge plate, 41 …… Deflector, 4
2,69 …… Plapeller shaft, 45,75 …… Auto-lock cylinder, 46,76 …… Auto-lock, 48,81 …… Tail gate,
50 Emergency stop device, 51, 78 Hopper, 61 Deflector, 62 Push plate, 63 Rotating plate, 64 Stopper pin, 70 Dump valve, 71 Gear pump, 72
… Inspection window, 74 …… Dump cylinder, 77 …… Dump fulcrum,
79… ram cylinder, 80… valve unit, 301…
Pressure switch, 303 ... Program controller, IR ...
... Interlock, T ... Hydraulic tank, V1 ... Electromagnetic switching valve for discharge, V2 ... Electromagnetic switching valve for scraping, V3 ... Electromagnetic switching valve for lift, V4 ... Electromagnetic switching valve for up and down, V5, V11 …
… Solenoid switching valve for automatic lock, V12… Solenoid switching valve for dumping, V13… Solenoid switching valve for ram, V14 …… Solenoid switching valve for hydraulic motor, SOLa1, SOLb1, SOLa2, SOLb2, SOLa3, SOLb3,
SOLa4, SOLb4, SOLa5 …… Solenoid.

Claims (2)

(57) [Claims] 1. A collection box mounted on a vehicle body, a discharge plate mounted in the collection box and moved forward and backward by a hydraulic cylinder that releases a reverse hydraulic pressure equal to or more than a predetermined value, and a dust connected to a rear portion of the collection box. Loading box, and a loading device disposed in the loading box, for compressing the loaded dust and loading the collection box into the collection box. A loading sensor for detecting a pressure of a hydraulic cylinder that drives the loading device; a pressure in a pushing process, a duration thereof, and a time integration value of the pressure are determined by a predetermined loading amount. Output means for determining that a predetermined loading amount has been reached when the value reaches a predetermined range as the value at the time of, and outputting a determination result. Control device. 2. A collection box mounted on a vehicle body, a discharge plate mounted in the collection box and moved forward and backward by a hydraulic cylinder for releasing a reverse hydraulic pressure equal to or more than a predetermined value, and a dust connected to a rear portion of the collection box. Loading box, and a loading device disposed in the loading box, for compressing the loaded dust and loading the collection box into the collection box. A loading control device for controlling, a pressing frequency counting means for counting the number of times dust is pressed into the collection box, and a pressure for outputting a signal when a pressing pressure of a hydraulic cylinder of the loading device becomes a predetermined value or more. A switch, while the number of presses counted by the number-of-presses counting means is equal to or less than a predetermined number, the loading amount is determined based on the number of presses, and when the number of presses exceeds the predetermined number,
Determination means for determining the loading amount by correcting the predetermined number of times using the time during which the output of the pressure signal from the pressure switch is maintained, and Control device.