JP6916645B2 - Garbage truck - Google Patents

Description

The present invention relates to a garbage truck, and more particularly to a structure and control for detecting a fire inside the garbage truck.

Even in recent years when household waste has been separated, fire accidents of garbage trucks continue to occur due to the contamination of lighters, gas cylinders, etc. This vehicle fire not only damages the user's repair costs, but also causes profitability damage due to the inability to collect for a certain period of time. In preparation for such a situation, measures are being taken such as installing a plurality of large fire extinguishers on the garbage truck and installing a fire spread suppression device using carbon dioxide gas.

However, many of such measures are effective after the fire is discovered, and a device for detecting the fire at an early stage is required.

Therefore, for example, as in Patent Document 1, a dust storage box mounted on a chassis and having a rear opening, and a dust storage box that is continuously provided at the rear opening of the dust storage box, has a dust input port, and is charged with the dust. A dust loading box equipped with a dust loading device for loading dust thrown in from the mouth into the dust storage box through the rear opening, and a dust chamber of the dust storage box and a machine room of the dust loading box are separated. Among the dust collecting vehicles having a partition plate extending over the entire width direction of the dust input box, a dust collecting vehicle having a smoke detection device on the upper part of the partition plate is known.

Further, as in Patent Document 2, it is known that a plurality of heat detectors are provided in a dust storage box, and halon gas is injected from a gas cylinder mounted when these heat detectors detect a fire.

Japanese Unexamined Patent Publication No. 2010-235306 Japanese Unexamined Patent Publication No. 1-256406

Reasons why an early detection device for a fire in a garbage truck has not been established include the harsh vehicle environment and the difficulty of detecting a fire in a garbage truck.

The smoke detection device used in Patent Document 1 is difficult to operate continuously in the environment of a garbage truck that is continuously exposed to fine dust due to the function of the device. On the other hand, it is difficult to realize a mechanism that is excellent in dustproof and waterproofness and that takes in only smoke generated from a fire in terms of mounting space and price.

Also, regarding the method of detecting ultraviolet rays generated from a fire, it is difficult to maintain the transparency of the light receiving part, and in a vehicle full of waste, it takes a considerable amount of time for the light to reach the light receiving part.

As for the method of detecting the temperature of a vehicle that has risen due to a fire as in Patent Document 2, the temperature sensor itself has a simple structure, is inexpensive, and has excellent durability. However, the temperature of the car body varies widely depending on the season and environment, so even if it is high in midsummer, it cannot be said that it is a fire. In addition, there are control problems due to the fact that a considerable number of sensors are required to quickly detect the heat of a fire that does not know where in the vehicle it will occur, and that small measurement errors of each sensor occur frequently in the vehicle environment. Also occurs.

In conclusion, even a fire detection device that is widely used in general has many problems in terms of cost and operation when it is installed in a garbage truck, and has not been realized yet.

The present invention has been made in view of this point, and an object of the present invention is to be able to withstand an environment peculiar to a garbage truck such as vibration, heat, and dust, and to put a dust storage box and dust into a user. The purpose is to be able to quickly and reliably warn the fire in the box according to the stage.

In order to achieve the above object, in the present invention, the amount of temperature change inside the dust storage box at a predetermined time is calculated, and a warning is given when the amount of temperature change exceeds a certain value.

Specifically, in the first invention, a dust storage box mounted on a chassis and having a rear opening, and a dust storage box that is connected to the rear opening of the dust storage box and has a dust input port and the dust input. A dust charging box provided with a dust loading device for loading dust thrown in from the mouth into the dust storage box through the rear opening, and the inside of the dust storage box and the inside of the dust storage box are separated from each other. The target is a dust collecting vehicle having a partition plate extending over the entire upper side of the dust input box in the width direction.

And the above garbage truck
A hot air passage hole provided above the partition plate and communicating the inside of the dust storage box and the inside of the dust input box,
A temperature sensor provided in the vicinity of the hot air passage hole inside the dust inlet and
It is provided with a control unit for inputting the detection value of the temperature sensor, and the control unit calculates the amount of temperature change between the current time before a predetermined time and the current time, and warns that the amount of temperature change exceeds a certain value. It is configured to do.

According to the above configuration, when a fire breaks out inside the dust storage box, the hot air goes upward and passes through the hot air passage hole, so that a temperature sensor provided in the vicinity thereof detects a temperature change. Then, the control unit determines that when the amount of temperature change from the predetermined time before to the current time exceeds a certain value, it is an abnormal situation different from the case where the dust storage box is simply heated in summer or the like and the temperature rises slowly. ,Warning.

In a harsh vehicle environment, small measurement errors frequently occur in the temperature sensor, and it is difficult to quickly determine whether it is normal or in a fire by the method of measuring the temperature change at the unit detection interval of the temperature sensor. By setting a predetermined time of about several seconds and continuing to measure the amount of temperature change between the predetermined time before and the current time, the control unit determines the characteristic temperature change observed at the time of fire. This control method reduces the influence of the measurement error of the temperature sensor, and the user can quickly and surely know the possibility of a fire in the dust storage box.

In the second invention, in the first invention,
The control unit
If the amount of temperature change is equal to or greater than a certain value and the temperature is smaller than the threshold value, an intermittent warning is given.
When the amount of temperature change is equal to or greater than a certain value and the temperature is equal to or greater than a threshold value, a continuous warning is provided.

According to the above configuration, even if the temperature rises sharply, if the temperature itself is low, it may not be a fire, so the warning is given intermittently. However, if the temperature rises sharply and the temperature exceeds the threshold value, there is a high possibility that a fire will occur, and warnings will be issued continuously. Therefore, it becomes easy for the user to judge whether it is a malfunction or an emergency.

In the third invention, in the first or second invention,
The control unit is configured to issue a disconnection warning when the detection value of the temperature sensor is equal to or lower than the lower limit value.

According to the above configuration, when a thermistor that utilizes the fact that the resistance value changes as the temperature changes is used as a temperature sensor, if the circuit is broken for some reason, the resistance value becomes infinite, resulting in an ultra-low temperature. .. Since such a value is usually impossible, it is judged as a disconnection and a disconnection warning is given.

As described above, according to the present invention, the control unit includes a control unit for inputting the detection value of the temperature sensor provided near the hot air passage hole inside the dust inlet, and the control unit is a predetermined time before the current time. By calculating the amount of temperature change between the time and the current time and warning that the amount of temperature change exceeds a certain value, it is possible to withstand the environment peculiar to dust collecting vehicles such as vibration, heat, and dust, and the user. It is possible to quickly and surely warn the fire in the dust storage box and the dust input box according to the stage.

It is sectional drawing which shows the position of the temperature sensor in the rear part of a garbage truck. It is a side view which shows the garbage truck which concerns on embodiment of this invention. It is a front view which shows the fire detector in a simplified manner. It is a figure which shows the fire detection and warning pattern by the inclination of a temperature rise.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 shows a garbage truck 1 according to an embodiment of the present invention. The garbage truck 1 is equipped with a dust storage box 3 having a rear opening 4 on a chassis 2. The rear opening 4 of the dust storage box 3 is provided with, for example, a dust input box 5 that can be opened and closed. The vehicle body is formed by the dust storage box 3 and the dust input box 5. The dust input box 5 has a dust input port 7 for dust on the lower side of the rear end, and inside the dust input box 5, the dust input from the dust input port 7 is loaded into the dust storage box 3 through the rear opening 4. The dust loading device 6 is built in. For example, the dust loading device 6 of the present embodiment has a rotary plate 6a and a push plate 6b, the rotary plate 6a is driven by a hydraulic motor 6c, and the push plate 6b is swung by a hydraulic cylinder 6d. It has become. The dust loading device 6 may be a compression type or a planetary gear type.

Then, as shown in FIG. 1, a partition plate 8 is extended so as to partition the inside of the dust storage box 3 and the inside of the dust input box 5 over the entire upper width direction of the dust input box 5. The upper side of the partition plate 8 is inclined rearward along the shape of the rear opening 4 so as to cover the upper side of the rear opening 4, and the angle at which the partition plate 8 is inclined rearward from the middle to the lower side is increased. It has entered the dust input box 5. The dust is pushed into the dust storage box 3 by the push plate 6b from the opening below the partition plate 8.

A hot air passage hole 9 for communicating the inside of the dust storage box 3 and the inside of the dust input box 5 is provided in the upper part of the partition plate 8, for example, one on each side. The position of the hot air passage hole 9 is not particularly limited as long as it is on the upper side of the dust storage box 3 at a position that does not interfere with the arrangement of the dust loading device 6, and the size and shape of the hole are not particularly limited. It is desirable that the hot air 51 on the upper end side of the dust input box 5 easily collects so that a fire in the dust input box 5 can be detected.

As shown in FIG. 3, the garbage truck 1 is provided with a fire detector 10 for detecting the occurrence of a fire in the garbage storage box 3. The fire detector 10 includes a box-shaped notification unit 16 provided in the driver's cab 2a and a temperature sensor 11 provided in the vicinity of a pair of hot air passage holes 9 inside the dust inlet 7 and composed of a thermistor. Each has. The temperature sensor 11 is not limited to the thermistor, but it is desirable that the temperature sensor 11 can withstand the harsh environment inside the dust input box 5.

As shown in FIG. 3, the notification unit 16 has a temperature rise warning lamp 13 that warns that the temperature inside the dust storage box 3 has risen. In addition, the notification unit 16 has an alarm buzzer 14 that notifies an abnormality when the temperature rises or the like. Further, the notification unit 16 is provided with a disconnection warning lamp 15 for notifying that a disconnection has occurred. For example, the temperature rise warning lamp 13 may be a red lamp and the disconnection warning lamp 15 may be a yellow lamp, so that the temperature rise warning lamp 13 may be color-coded for easy understanding.

The notification unit 16 has a built-in control unit 12, and the control unit 12 has a time counting unit, a calculation processing unit, and a storage unit (not shown). The detection value of the temperature sensor 11 is input to the control unit 12. The control unit 12 reads the detected value of the temperature sensor 11 every unit time (for example, 1 second) and stores it in the storage unit together with the current time obtained from the timekeeping unit. As a result, the data in which the detection value of the temperature sensor 11 and the time are set is stored in the storage unit. Further, the calculation processing unit uses the data accumulated in the storage unit for each unit time to detect the temperature sensor 11 at a time before a predetermined time (for example, 7 seconds) from the detection value of the temperature sensor 11 at the current time. It is configured to subtract the value to calculate the amount of temperature change. Further, the calculation processing unit is configured to compare whether or not the calculated temperature change amount is equal to or higher than a certain value, and if it is determined that the calculated temperature change amount is equal to or higher than a certain value, the temperature rise warning lamp 13 is turned on to warn the user. There is.
The control unit 12 may be located at a different location from the notification unit 16 shown in FIG.

-Activation of fire detector-
Next, the operation of the fire detector 10 of the garbage truck 1 according to the present embodiment will be described.

As shown in FIG. 1, when a fire 50 occurs inside the dust storage box 3 while the garbage truck 1 is running, the dust loading device 6 is operating, or is on standby, the hot air 51 heads upward. It passes through the hot air passage hole 9 on the upper side of the partition plate 8. Then, the temperature sensor 11 provided in the vicinity thereof detects the temperature change.

Then, when the control unit 12 subtracts the detection value of the temperature sensor 11 at a predetermined time (for example, 7 seconds) from the detection value of the temperature sensor 11 at the current time and becomes a certain value or more, the temperature change amount is simply summer. It is judged that the situation is different from the case where the dust storage box 3 is heated and the temperature rises slowly, and a warning is given.

Specifically, as shown in FIG. 4, when the temperature change amount is equal to or more than a certain value and the temperature is smaller than the threshold value (when shown on the left side of FIG. 4), the control unit 12 is shown as a warning pattern. The temperature rise warning lamp 13 is intermittently turned on, and the warning buzzer 14 is intermittently sounded to give a warning. The control unit 12 may issue a warning even when the temperature simply exceeds a certain level. On the other hand, as shown on the right side of FIG. 4, when the amount of temperature change is equal to or higher than a certain value and the temperature is equal to or higher than the threshold value, the temperature rise warning lamp 13 is continuously turned on and the warning buzzer 14 is continuously turned on. Sound to warn you. By doing so, it is possible to warn the user from the stage of a small fire and prompt a prompt response.

When the control unit 12 detects that the detected value of the temperature sensor 11 is equal to or lower than the lower limit value, the control unit 12 lights the disconnection warning lamp 15 to notify the user. When a thermistor is used as the temperature sensor 11 as in the present embodiment, if the circuit is disconnected for some reason, the resistance of the temperature sensor 11 becomes infinite, resulting in an ultra-low temperature. Since such a temperature is not possible in common sense, in that case, a disconnection warning can be issued to prompt the inspection of the fire detector 10.

As described above, in the present embodiment, since the fire detector 10 has the temperature sensor 11 instead of the smoke detection sensor, no error due to dust and vibration in the dust storage box 3 occurs. In addition, by setting a predetermined time of about several seconds and measuring the amount of temperature change between the predetermined time before and the current time, a characteristic temperature rise at the time of a fire is detected. It is possible to avoid determining that it is an outbreak. Therefore, the user can quickly and surely know the possibility that a fire has occurred in the dust storage box 3.

In the present embodiment, even if the temperature rises sharply, if the temperature itself is low, there is a possibility that it is not a fire. Therefore, the warning is given intermittently, and the temperature rises sharply. Moreover, when the temperature exceeds the threshold value, there is a high possibility that a fire will occur, so warnings are issued continuously. This makes it easier for the user to determine whether it is a malfunction or an emergency.

In the present embodiment, since the temperature sensor 11 is provided on the upper part of the dust input box 5, the waste inside is not touched, and the temperature sensor 11 and the member to which the temperature sensor 11 is attached are exposed to direct sunlight. Nor. By installing the temperature sensor 11 at this position, the influence of the temperature change of the vehicle body 2 due to an external factor can be mitigated. Further, by ensuring that the hot air passes through the hot air passage hole 9 regardless of the position of the dust storage box 3, the internal temperature change can be read efficiently and surely.

Therefore, according to the garbage truck 1 according to the present embodiment, it is possible to withstand the environment peculiar to the garbage truck 1 such as vibration, heat, dust, etc. You can give a quick and reliable warning accordingly.

It should be noted that the above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications and applications.

1 Garbage truck
2 chassis
2a cab
3 Garbage storage box
4 Rear opening
5 Garbage input box
6 Dust loading device
6a rotating plate
6b Push-in plate
6c hydraulic motor
6d hydraulic cylinder
7 Dust inlet
8 partition plate
9 Hot air passage hole
10 Fire detector
11 Temperature sensor
12 Control unit
13 Temperature rise alarm lamp
14 Alarm buzzer
15 Disconnection warning lamp
16 Notification unit
50 fire
51 Hot air

Claims (3)

A dust storage box mounted on the chassis and having a rear opening, and a dust storage box that is connected to the rear opening of the dust storage box and has a dust inlet, and the dust thrown in from the dust inlet is opened to the rear. The entire width direction of the upper side of the dust storage box so as to partition the inside of the dust storage box from the inside of the dust storage box and the dust loading box provided with the dust loading device for loading into the dust storage box through the section. It is a dust collecting vehicle with a partition plate extended over
A hot air passage hole provided above the partition plate and communicating the inside of the dust storage box and the inside of the dust input box,
A temperature sensor provided in the vicinity of the hot air passage hole inside the dust inlet and
It is equipped with a control unit for inputting the detection value of the temperature sensor.
The control unit
Calculate the amount of temperature change between the current time and the specified time before and the current time,
A garbage truck characterized in that it is configured to warn of a fire when the amount of temperature change is equal to or higher than a certain value and the temperature is equal to or higher than a threshold value. In the garbage truck according to claim 1.
The control unit
If the amount of temperature change is equal to or greater than a certain value and the temperature is smaller than the threshold value, an intermittent warning is given.
A garbage truck characterized in that it is configured to continuously warn when the amount of temperature change is equal to or higher than a certain value and the temperature is equal to or higher than a threshold value. In the garbage truck according to claim 1 or 2.
The garbage truck is characterized in that the control unit is configured to issue a disconnection warning when the detection value of the temperature sensor is equal to or lower than the lower limit value.

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