JPH0652186B2 - Vehicle weighing device - Google Patents

Description

Detailed Description of the Invention A. OBJECT OF THE INVENTION (1) Industrial field of application The present invention relates to a vehicle that moves while loading or unloading a load at a plurality of locations, and the weight of the load loaded at each location or the load loaded at each location. The present invention relates to a weighing device that measures the weight of an object.

(2) Conventional technology Normally, a garbage truck collects dust at multiple points while moving,
Work will be performed to collectively discharge this dust at the treatment plant. If you collect reusable dust such as aluminum cans and corrugated cardboard with this garbage truck, you must pay the amount commensurate with its weight.If you collect non-reusable dust, the amount commensurate with the weight. May be charged as a shipping fee. For this reason, a load detector such as a load cell is attached to the packing box of the garbage truck to measure the weight of the collected dust.

Further, a liquid carrier such as a tank truck loads a liquid such as kerosene into a tank at a storage base and moves while discharging the liquid at a plurality of locations, so it is necessary to measure the weight of the liquid discharged at each location. For this reason, a load detector is also mounted on the tank of the liquid transport vehicle to measure the weight of the discharged liquid.

(3) Problems to be Solved by the Invention However, since the load detector can measure only the total weight of the loads currently loaded in the packing box or the tank, the loads loaded or discharged at each place are loaded. In order to know the weight of the load detector, the output of the load detector had to be reset to "0" each time, and the operation was very complicated. Moreover, if this reset operation is forgotten, it becomes impossible to know the weight of the loaded or unloaded cargo at each place, which is extremely inconvenient.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a weighing device capable of simply and reliably measuring the weight of a load loaded or discharged by a vehicle at each location.

B. Configuration of the Invention (1) Means for Solving the Problems In order to achieve the above-mentioned object, a weighing device in a vehicle of the present invention has a configuration shown in FIG. 1 which is a claim correspondence diagram.

That is, the present invention stores a load detector that measures the total weight of a load stored in a container of a vehicle, an output signal of the load detector, and the stored value when the load in the container is discharged. Is reset to "0", a calculating means for calculating a loading weight by subtracting a stored value of the memory means from an output signal of the load detector every time loading is carried, First, it is provided with an indicator for displaying a loaded weight, a discriminating means for issuing an output signal when the loaded weight is equal to or less than a reference negative value, and an alarm device activated by the output signal of the discriminating means. It is a feature of.

Further, the present invention stores a load detector that measures the total weight of a load stored in a container of a vehicle, an output signal of the load detector, and the storage when the load is loaded in the container. Memory means capable of resetting the value to the value of the total weight of the load, and calculating means for calculating the discharge weight by subtracting the output signal of the load detector from the stored value of the memory means each time the load is discharged. And an indicator for displaying the discharged weight, a judging means for issuing an output signal when the discharged weight is equal to or less than a reference negative value, and an alarm device operated by the output signal of the judging means. This is the second feature.

(2) Operation According to the first feature of the present invention having the above-described configuration, the load detector measures the total weight of the load in the container each time the load is loaded into the container of the vehicle. The output signal of this load detector is stored in the memory means, and when a new load is loaded, the arithmetic means subtracts the previous stored value from the output signal of the load detector at that time and loads this time. The weight is calculated and the result is displayed on the display. As a result, even if the vehicle continuously loads the loaded items, the loaded weight of the loaded items can be measured each time.

The value stored in the memory means is reset to "0" when the load in the container is discharged, but if the reset operation is forgotten, the output of the calculation means will be output at the next loading of the load. Since the value is smaller than the negative value of the standard,
The discriminating means that detects this activates the alarm device, and notifies that the reset has been forgotten.

Further, according to the second feature of the present invention, the load detector measures the total weight of the load in the container each time the load is discharged from the container of the vehicle. The output signal of this load detector is stored in the memory means, and when the load is newly discharged, the calculating means subtracts the output signal of the load detector at that time from the previously stored value, and the discharged weight of this time. Is calculated and the result is displayed on the display. Thus, even if the vehicle continuously discharges the load, the discharged weight of the load can be measured each time.

The value stored in the memory means is reset to the value of the total weight of the load when the load is loaded in the container. However, if the reset operation is forgotten, the next load is discharged. At some time, the output value of the calculation means becomes smaller than the reference negative value, and therefore the determination means that detects it activates the alarm device to notify that the reset is forgotten.

(3) Examples Hereinafter, examples of the present invention will be described with reference to the drawings.

2 to 4 show an embodiment of the present invention, and FIG. 2 is an overall side view of a garbage truck equipped with the weighing device, and FIG.
FIG. 4 is a plan view of the same, and FIG. 4 is a block diagram of the same.

As shown in FIGS. 2 and 3, the garbage truck V includes a cab 1 in the front part of the vehicle body and a luggage box 2 which is a container for storing the dust in the rear portion of the vehicle body. A packer 3 having a well-known pushing device is provided in the opening of the packer 3. The load box 2 is supported on the vehicle body via load cells 4 as load detectors provided at the four corners of the load box 2. The output signals of the load cells 4 are added up by a summing device 5 and the cab 1
It is input to the weighing device main body M, which will be described later, mounted on the. When the load box 2 is empty, the weight of the empty load box 2 and the weight of the packer 3 are acting on the load cell 4, and the values are set to “0” in the weighing device main body M. Is set. Therefore, the display by the weighing device main body M corresponds to the total weight of only the dust in the luggage box 2 excluding the weights of the luggage box 2 and the packer 3.

As shown in FIG. 4, the weighing device main body M includes a microcomputer 6, and the analog value which is the output signal of the adder 5 is amplified by an amplifier 7 and further an A / D converter 8
Is converted to a digital value by C of the microcomputer 6
Input to PU9.

Connected to the CPU 9 are a ROM 10 that stores a program for calculating the loading weight of dust, and a RAM 11 that stores the total weight of dust in the packing box 2 and a reference value for activating an alarm device described later. Further, an LCD (liquid crystal display) 12 as a display means, a printer 13, and an LED (light emitting diode) 14 as an alarm means are connected to the CPU 9, and the total amount of dust stored in the packing box 2 stored in the RAM 11 is totaled. Reset switch 15 to reset the weight to "0" and C
The PU9 is operated to calculate the loading weight and the result is referred to as the LC
An operation unit 17 including a D12 and a measurement switch 16 displayed on the printer 13 is connected.

Next, the operation of the embodiment of the present invention having the above-described configuration will be described by R
Description will be made based on the flowchart of FIG. 5 showing the contents of the program stored in the OM 10.

In step S1, the total weight GW _n of dust in the luggage box 2 at the time when the load cell 4 finishes loading the dust for the nth time is measured. Next, in step S2, the total weight GW of dust collected at the end of the previous (n-1) th load stored in the RAM 11
Call the _n-1, computed by the calculation formula GW _n -GW _n-1 the loading weight W _n of the current (n-th) in CPU 9. Next, in step S3, the loading weight W _n is the RAM 1
It is determined whether or not it is equal to or less than the reference value W0 stored in 1 of −200 kg. If NO, the process proceeds to step S4 as normal. In step S4, the measurement switch 16 turns off.
If it is N, the loading weight W _n calculated in step S2 is displayed on the LCD 12 in step S5, and the printer 13 prints the value in step S6. Then, in step S7, the total weight GW _n-1 of dust at the end of the previous loading stored in the RAM 11 is updated by the total weight GW _{n of} dust measured in step S1.

As described above, the loading weight W _n is measured every time dust is loaded at each place, and finally the dust in the packing box 2 is collectively discharged at the processing site. At this time, the operator operates the reset switch 15 to reset the total weight GW _{n of} dust stored in the RAM 11 to “0”. However, if the operator forgets to operate the reset switch 15, the total weight GW _n of the dust before discharge remains without being reset, and thus the dust is newly loaded for the first time. At this time, the value of W1 calculated in step S2 is always smaller than the reference value W0 of -200 kg. As a result, the LED 14 as an alarm device blinks in step S8 to notify that the reset switch 15 has been forgotten to be operated. When the worker notices this and operates the reset switch 15 in step S9, the LED 14 is turned off and the alarm is released in step S10, and the total weight GW _{n of} dust stored in the RAM 11 is reset to "0" in step S11. To be done.

FIG. 6 shows another embodiment in which the vehicle weighing device of the present invention is applied to a tank truck V.

In this embodiment, the same components as those in the previous embodiment are designated by the same reference numerals, and duplicated description will be omitted.

This tank truck V moves while discharging liquid such as kerosene, which is a load loaded at the storage base, at each place in sequence, and is a tank 19 as a container equipped with a charging port 18.
A pump 22 is provided for discharging the liquid stored in the tank 19 via a nozzle gun 21 attached to the tip of the hose 20. As in the previous embodiment, the tank 19 is equipped with a load cell 4 as a load detector, and the load cell 4 is connected to the adder 5 and the weighing device main body M.

The structure of the weighing device body M is the same as that of the previous embodiment shown in FIG.
Only the contents of the program for calculating the discharge weight of the liquid stored in the OM 10 are different.

Next, the operation of this embodiment will be described based on the flowchart of FIG. 7 showing the contents of the program stored in the ROM 10. In addition, this flowchart shows step S2.
Only step S11 differs from the flowchart of the previous embodiment (see FIG. 5).

The total weight GW of the liquid in the tank 19 at the time when the discharge of the liquid for the nth time by the load cell 4 is completed in step S1.
Measure _n . Next, in step S2, the total weight GW _n-1 of the liquid at the end of the previous (n-1) th discharge stored in the RAM 11 is called, and the CPU 9 reads this time (nth).
The discharge weight W _{n of the above} is calculated by the calculation formula GW _n-1 −GW _n . The arithmetic expression is sign as the loading weight in the previous embodiment formula _{(W n = GW n -GW n} -1) is reversed,
This is because the total weight GW _n is reduced by discharging the liquid, and thus GW _n-1 > GW _n . Succeedingly, in a step S3, it is determined whether or not the discharged weight W _n is equal to or less than a reference value W0. If NO, it is determined to be normal and the process proceeds to a step S4. When the measurement switch 16 is ON in step S4, the discharged weight W _n calculated in step S2 is displayed on the LCD 12 in step S5, and the printer 13 prints the value in step S6. Then, in step S7, the total liquid weight GW _n-1 at the end of the previous discharge stored in the RAM 11 is updated with the total liquid weight GW _n measured in step S1.

When the liquid discharge at each place is completed as described above,
Liquid is loaded into the tank 19 at the storage base.
When the loading of the liquid is completed, the operator operates the reset switch 15 to reset the stored value in the RAM 11 to the value of the total weight GW ₁ of the liquid at that time. However, if the operator forgets to operate the reset switch 15, the total weight GW _n of the liquid before loading (usually "0" or a very small value) remains without being reset. Therefore, when the liquid is newly discharged for the first time, the value of W1 calculated in step S2 is always a negative value smaller than the reference value W0. As a result, the LED 14 as an alarm device blinks in step S8 to notify that the reset switch 15 has been forgotten to be operated. When the worker notices this and operates the reset switch 15 in step S9, the LED 14 is turned off and the alarm is released in step S10, and the total weight GW _{n of the} liquid stored in the RAM 11 in step S11 is the value at the end of loading. Is reset to.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various small design changes can be made without departing from the present invention described in the claims. It is possible to do.

For example, instead of realizing the calculating means a, the determining means b, and the storing means c by the microcomputer 6, it is also possible to configure them by using a logic circuit. Further, the alarm device is not limited to the LED 14, and an appropriate means such as a buzzer can be adopted. Further, the number of load cells 4 as load detectors does not necessarily have to be four, and it is also possible to employ another suitable load detector. Furthermore, the reference value for discrimination, -200 kg, is merely an example, and other appropriate reference values can be set.

C. EFFECTS OF THE INVENTION According to the first feature of the present invention described above, when a vehicle moves while loading a load at a plurality of locations, it becomes possible to automatically measure the loading weight at each location. Then, even after forgetting to reset the total weight of the loaded items stored in the memory means to "0" after the loaded items are collectively discharged, the determination means causes the resetting to be performed at the next loading of the loaded items. Since the alarm device is activated upon detection of forgetting to do so, it is possible to reliably measure the loaded weight.

Further, according to the second feature of the present invention, when the vehicle moves while discharging the load at a plurality of places, it becomes possible to automatically measure the discharged weight at each place. When a load is newly loaded, even if the user forgets to reset the stored value in the memory means to the value of the total weight of the load, the determining means resets the load at the next discharge of the load. Since the alarm device is activated by detecting that the user forgets to do so, the discharged weight can be reliably measured.

[Brief description of drawings]

FIG. 1 is a diagram corresponding to the claims of the present invention, FIG. 2 is an overall side view of a garbage truck equipped with a weighing device according to an embodiment of the present invention, FIG. 3 is a plan view of the same, and FIG. 4 is a block configuration diagram thereof. 5 is a flowchart thereof, and FIG. 6 is a side view of an entire tank truck provided with a weighing device according to another embodiment of the present invention,
FIG. 7 is a flowchart thereof. a ... Computing means, b ... Discriminating means, c ... Storage means 2 ... Packing box (container), 4 ... Load cell (load detector), 12 ... LCD (display), 13 ... Printer ( Display), 14 ... LWD (alarm), 19 ... Tank (container)

Claims (2)

[Claims] 1. A load detector (4) for measuring the total weight of a load stored in a container (2) of a vehicle, and storing an output signal of the load detector (4) and storing the container (2). The memory means (c) capable of resetting the stored value to "0" when the loaded article inside is discharged, and the memory means (c) from the output signal of the load detector (4) every time the loaded article is loaded. The calculation means (a) for calculating the loading weight by subtracting the stored value of c) and the indicator (12, 1) for displaying the loading weight.
3), a discriminating means (b) which outputs an output signal when the loaded weight is less than a reference negative value, and an alarm device (14) which is activated by the output signal of the discriminating means (b). A weighing device in a vehicle characterized by the above. 2. A load detector (4) for measuring the total weight of a load stored in a container (19) of a vehicle, an output signal of the load detector (4) being stored, and a container (19). A memory means (c) capable of resetting the stored value to the value of the total weight of the loaded article when the loaded article is loaded therein, and a stored value of the memory means (c) each time the loaded article is discharged. The calculating means (a) for calculating the discharged weight by subtracting the output signal of the load detector (4), the indicators (12, 13) for displaying the discharged weight, and the discharged weight being equal to or less than the reference negative value. A discriminating means (b) which outputs an output signal at a certain time, and an alarm device (1 which operates according to the output signal of the discriminating means (b)
4) A weighing device in a vehicle, comprising: