Fire detection system for garbage truck

Abstract

To provide a fire detection system for garbage trucks that is less likely to generate non-fire alarms.SOLUTION: The fire detection system for garbage trucks of the present invention comprises a floating dust filter, through which floating dust does not pass but smoke does, and a smoke detector. The floating dust filter is installed over the smoke detector in a garbage compartment.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fire detection system to be installed in a refuse truck. [Background technology]

[0002] The garbage compactor vehicle comprises a vehicle, a garbage storage chamber mounted on the vehicle, and a garbage input section provided at the opening of the garbage storage chamber, and the input garbage is pressed by a rotating plate or a pushing plate arranged in the garbage input section to store it in the garbage storage chamber.

[0003] If mobile batteries or other devices are mixed in with the garbage being collected, the mobile batteries or other devices may be crushed and ignite when the garbage is pushed through the rotating plate or pushing plate, which could cause a fire inside the garbage collection room. In Patent Document 1, a smoke detector and a heat detector are installed in the garbage compactor truck, and if a fire is detected, the fire is extinguished. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-112312 Summary of the Invention [Problem to be solved by the invention]

[0005] When collecting garbage, if a flaming mobile battery or other battery is at the bottom of the garbage and the fire around the mobile battery or other battery is buried under other garbage, it is difficult to detect the fire with a heat detector, and by the time a fire is detected, it may have become a major fire. In particular, in garbage trucks, garbage is collected into the garbage collection chamber by being pushed up from below by the garbage feed section, so if a mobile battery or other battery is present, it is likely to be crushed and placed under the garbage.

[0006] Smoke detectors can detect fires earlier than heat detectors because smoke from a fire that breaks out below the garbage pile rises and leaves the pile. However, in the garbage collection compartment of a garbage truck, smoke detectors can mistakenly detect floating dust as smoke, resulting in false fire alarms.

[0007] An object of the present invention is to provide a fire detection system for a garbage truck that is less likely to produce false fire alarms. [Means for solving the problem]

[0008] In one embodiment of the present invention, a fire detection system for a garbage truck comprises a floating dust filter that allows smoke to pass through but not floating dust, and a smoke detector, and the floating dust filter is arranged in the garbage storage chamber, covering the smoke detector. [Effects of the Invention]

[0009] The present invention can provide a fire detection system for a garbage truck that is less likely to produce false fire alarms. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a side view of the garbage compactor in the first embodiment. [Figure 2] AA cross-sectional view of the garbage compactor in the first embodiment. [Figure 3] FIG. 10 is a side view of a garbage compactor in a second embodiment. [Figure 4] FIG. 11 is a side view of a garbage compactor in a third embodiment. [Figure 5] FIG. 10 is a side view of a garbage compactor in a fourth embodiment. [Figure 6] FIG. 10 is a cross-sectional view of the garbage compactor taken along line BB in the fourth embodiment. [Figure 7] FIG. 10 is a side view of the garbage truck in the fourth embodiment when discharging garbage. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0011] FIG. 1 shows a side view of a garbage compactor 1 in Example 1. FIG. 2 shows a cross-sectional view taken along the AA plane in FIG. 1. The garbage compactor 1 is provided with a garbage collection box 12 behind a driver's seat 11, and a garbage insertion unit 13 behind the garbage collection box 12. The garbage collection box 12 has two side panels 123 between a top panel 121 and a bottom panel 122, and a front panel 124 in front of them. In FIG. 1, the front side panel 123 and the side panel of the garbage insertion unit 13 (not shown) are removed. The top panel 121 is shorter than the bottom panel 122, and the rear end of the top panel 121 is located forward of the rear end of the bottom panel 122, with the rear of the side panel 123 being slanted. The garbage insertion unit 13 is provided to cover the slanted opening at the rear of the garbage collection box 12.

[0012] The waste input section 13 is provided with a waste receptacle 131, a rotating plate 132, and a pusher plate 133. In FIG. 1, the rotating plate 132 rotates clockwise around a rotation axis 132a, and the pusher plate 133 rotates like a pendulum around a rotation axis 133a. Waste G input into the waste receptacle 131 is lifted by the rotating plate 132 rotating clockwise. At this time, the lower end of the pusher plate 133 swings to the right and is positioned around the rotation axis 132a. Then, the pusher plate 133 rotates clockwise to push the waste G into the waste storage chamber R. In FIG. 1, the upper part of the waste input section 13 and the interior of the waste storage box 12 form the waste storage chamber R, indicated by the dotted line.

[0013] As shown in Fig. 1, smoke detector 14 and suspended dust filter 15 are provided at the upper rear portion inside dust collection box 12. As shown in Fig. 2, smoke detector 14 includes light transmitting unit 141 and light receiving unit 142. Light transmitting unit 141 and light receiving unit 142 are fixed to the upper portions of opposing side panels 123. Furthermore, suspended dust filter 15 is fixed to top panel 121 so as to cover light transmitting unit 141, light receiving unit 142, and the space between them.

[0014] Inside the suspended dust filter 15, infrared rays Ir are constantly transmitted from the light transmitting unit 141 to the light receiving unit 142. If a fire breaks out in the garbage G in the garbage storage chamber R, smoke passes through the suspended dust filter 15 and blocks the infrared rays Ir constantly transmitted from the light transmitting unit 141. The infrared rays Ir received by the light receiving unit 142 are then dimmed, thereby detecting smoke. When the smoke detector 14 detects smoke, it sounds and emits light from alarm devices (not shown) installed on the exterior of the garbage insertion unit 13 and inside the driver's seat 11, alerting the user to the occurrence of a fire. Suspended dust in the garbage storage chamber R does not pass through the suspended dust filter 15 and does not reach the optical path of the infrared rays Ir. This prevents false fire alarms caused by suspended dust.

[0015] A hot zone H, shown by diagonal lines in Figures 1 and 2, occurs in the upper part of the waste storage chamber R. The hot zone H is formed when heat generated by the stored waste G rises and accumulates in the upper part of the waste storage chamber R. Because smoke from a fire is hotter than the surrounding area, it rises and reaches the smoke detector 14 installed at the top. However, smoke from a fire is less likely to penetrate the hot zone H due to its high temperature. Therefore, it is preferable to install the smoke detector 14 away from the hot zone H. Furthermore, in the hot zone H, the refractive index of air is unstable, which makes it easy for the optical path of infrared light Ir to bend. Furthermore, it is undesirable for the temperature of the smoke detector 14, which is equipped with a sensor that is an electronic device, to rise, which can cause a false fire alarm. To avoid the hot zone H, the smoke detector 14 in Example 1 is fixed to the side panel 123, spaced apart from the top panel 121.

[0016] As described above, the fire detection system for the refuse compactor 1 in Example 1 is equipped with the suspended dust filter 15, which allows smoke to pass but not suspended dust, and the smoke detector 14. The smoke detector 14 is located away from the ceiling of the refuse storage chamber R to avoid the hot zone H, and the suspended dust filter 15 is provided in the refuse storage chamber R, covering the smoke detector 14. [Example]

[0017] 3 shows a side view of the refuse truck 2 in Example 2. The refuse truck 2 is provided with a refuse collection box 22 behind the driver's seat 21, and a refuse insertion section 23 behind the refuse collection box 22. A smoke detector 24 and a suspended dust filter 25 that covers the smoke detector 24 are provided at the upper rear inside the refuse collection box 22. These configurations, the installation configuration of the smoke detector 24, the smoke detection action of the smoke detector 24, etc. are the same as those of the fire detection system of the refuse truck 1 in Example 1.

[0018] In the fire detection system of Example 2, a vibration device 26 is attached to the suspended dust filter 25 as a clogging prevention mechanism. The vibration device 26 is constantly vibrating, constantly vibrating the suspended dust filter 25. This vibration makes it difficult for suspended dust to adhere to the suspended dust filter 25, thereby preventing clogging of the suspended dust filter 25.

[0019] In the second embodiment, the vibrating device 26 is constantly vibrating when the garbage compactor 2 is in operation, but the vibrating device 26 does not have to vibrate when the garbage compactor 2 is not carrying garbage. The vibrating device 26 may also vibrate intermittently. [Example]

[0020] The fire detection system for the refuse truck 3 in Example 3 also prevents clogging of the floating dust filter 35. Figure 4 shows a side view of the refuse truck 3 in Example 3. The refuse truck 3 is provided with a garbage collection box 32 behind the driver's seat 31, and a garbage insertion section 33 behind the garbage collection box 32. A smoke detector 34 and a floating dust filter 35 that covers the smoke detector 34 are provided at the upper rear inside the garbage collection box 32. These configurations, the installation configuration of the smoke detector 34, the smoke detection action of the smoke detector 34, etc. are the same as those of the fire detection system for the refuse truck 1 in Example 1.

[0021] In the fire detection system of the third embodiment, as shown in Fig. 4, a blower 36 is attached to the top plate 321 of the dust collection box 32 as a clogging prevention mechanism. When no dust G is stored in the dust collection chamber R, the blower 36 draws in outside air and blows it from the inside to the suspended dust filter 35. This blows the suspended dust adhering to the suspended dust filter 35 out of the suspended dust filter 35, cleaning it and preventing clogging.

[0022] In the third embodiment, during a period when fire detection is not required and no dust G is stored in the dust storage chamber R, the blower device 36 draws in outside air and blows it from the inside to the suspended dust filter 35. However, when dust G is stored in the dust storage chamber R, the blower device 36 may draw in and blow outside air for a short period at predetermined time intervals to clean the suspended dust filter 35, and perform fire detection during the period when no air is being blown. [Example]

[0023] FIG. 5 shows a side view of a garbage compactor 4 in Example 4. FIG. 6 shows a cross-sectional view taken along plane BB in FIG. 5. The garbage compactor 4 has a garbage collection box 42 behind the driver's seat 41, and a garbage insertion unit 43 behind the garbage collection box 42. The garbage collection box 42 has two side panels 423 between a top panel 421 and a bottom panel 422, and a front panel 424 in front of them. In FIG. 5, the front side panel 423, the insertion unit side panel 435 of the garbage insertion unit 43, and the side of the suspended dust filter 45 (see FIG. 6) are removed. The top panel 421 is shorter than the bottom panel 422, and the rear end of the top panel 421 is located forward of the rear end of the bottom panel 422, with the rear of the side panel 423 being slanted. The garbage insertion unit 43 is provided to cover the slanted opening at the rear of the garbage collection box 42. These configurations and the smoke detection function of the smoke detector 44 are the same as those of the fire detection system for the refuse compactor 1 in the first embodiment.

[0024] The rear opening of the dust collection box 42 is slanted with the upper side tilted forward, so that the upper rear of the dust collection chamber R is the interior of the dust insertion section 43, as shown in Fig. 5. The dust insertion section 43 is provided with a dust receptacle 431, a rotating plate 432, and a push-in plate 433. In Fig. 5, the upper part of the dust insertion section 43 and the interior of the dust collection box 42 form the dust collection chamber R, as indicated by the dotted line. Although not shown, the area surrounded by the insertion section top plate 434, insertion section side plate 435, and side plate 423 in Fig. 6 also forms the dust collection chamber R, excluding the inside of the suspended dust filter 45.

[0025] As shown in Fig. 5, the smoke detector 44 and the suspended dust filter 45 of the fourth embodiment are provided in the garbage receiving section 43. The smoke detector 44 is fixed to the receiving section top plate 434 of the garbage receiving section 43 via a mounting base 46, and the suspended dust filter 45 is also fixed to the receiving section top plate 434. As shown in Figs. 5 and 6, the smoke detector 44 is installed by the mounting base 46 at a position where the light transmitting section 441 and the light receiving section 442 are separated from the ceiling of the garbage storage chamber R to avoid the hot zone H.

[0026] 6, the smoke detector 44 and the suspended dust filter 45 are installed at a distance from the input section side panel 435. In the space away from them, an arm (not shown) for operating the pusher plate 433 and an arm (not shown) for lifting the garbage input section 43 and opening the garbage storage chamber R are arranged.

[0027] FIG. 7 shows a side view of the garbage compactor 4 in Example 4 during garbage discharge. As with FIG. 5, the front side panel 423, the input side panel 435 of the garbage input section 43, and the side of the suspended dust filter 45 are removed. When garbage G is discharged, the garbage input section 43 is lifted by an arm (not shown) to open the rear of the garbage collection box 42. The upper part of the garbage input section 43 and the upper part of the garbage collection box 42 are rotatably connected, and the lower part of the garbage input section 43 is lifted rearward, opening the garbage collection box 42 as shown in FIG. 7. Then, by lifting the front of the garbage collection box 42 with the arm 47, the garbage collection box 42 is tilted as shown in FIG. 7, and garbage G is discharged from the rear. FIG. 7 shows the situation in which garbage G is being discharged.

[0028] As shown in Fig. 7, the smoke detector 44 and the suspended dust filter 45 installed on the top plate 434 of the input section are raised together with the garbage input section 43. Therefore, as shown in Fig. 7, even if the garbage G is a large mass so that its upper surface is close to the top plate 421, the suspended dust filter 45 and the smoke detector 44 do not hinder the discharge of the garbage G.

[0029] The smoke detectors 14, 24, 34, and 44 in the above-described first to fourth embodiments are separate types that detect smoke by the attenuation of light caused by the smoke. However, spot-type smoke detectors or smoke detectors that detect smoke by detecting the light scattered by the smoke may also be used.

[0030] Furthermore, the specific configuration is not limited to the embodiments, and the present invention includes design changes within the scope of the gist of the present invention. Furthermore, the above-mentioned examples and modifications can be combined by utilizing each other's technology as long as there are no particular contradictions or problems in the purpose, configuration, etc. [Explanation of symbols]

[0031] R Garbage Containment Room, H Hot Zone, G Garbage, 1 garbage truck, 11 driver's seats, 12 garbage collection box, 121 top plate, 122 bottom plate, 123 side plate, 124 front plate, 13 garbage input section, 131 garbage receiver, 132 rotating plate, 132a rotating shaft, 133 pushing plate, 133a rotating shaft, 14 smoke detector, 141 light transmitter, 142 light receiver, 15 suspended dust filters, 2 garbage trucks, 21 driver's seats, 22 garbage collection box, 23 garbage input section, 24 smoke detector, 25 suspended dust filter, 26 vibration device, 3 garbage truck, 31 driver's seat, 32 garbage collection box, 321 top plate, 33 garbage input section, 34 smoke detector, 35 suspended dust filter, 36 blower, 4 garbage trucks, 41 driver's seats, 42 garbage collection box, 421 top plate, 422 bottom plate, 423 side plate, 424 front plate, 43 garbage input section, 431 garbage receiver, 432 rotating plate, 433 push plate, 434 input section top plate, 435 input section side plate, 44 Smoke detector, 441 Light transmitter, 442 Light receiver, 45 suspended dust filter, 46 mounting base, 47 arm

Claims

1. A suspended dust filter that allows smoke to pass through but not suspended dust, a smoke detector; A fire detection system for a garbage truck, characterized in that the suspended dust filter is installed in the garbage storage chamber, covering the smoke detector.

2. 2. A fire detection system for a garbage truck according to claim 1, wherein the floating dust filter is prevented from clogging by a clogging prevention mechanism.

3. 3. The fire detection system for a garbage truck according to claim 2, wherein the clogging prevention mechanism vibrates the floating dust filter to prevent floating dust from adhering thereto.

4. 3. A fire detection system for a garbage compactor truck according to claim 2, wherein the clogging prevention mechanism cleans the suspended dust filter by blowing air onto the suspended dust filter.

5. 5. A fire detection system for a garbage truck according to claim 1, wherein the smoke detector is positioned away from the ceiling of the garbage storage room to avoid hot zones.

6. 6. A fire detection system for a garbage truck according to claim 5, wherein the smoke detector and the suspended dust filter are installed on the top plate of the garbage dump section, spaced apart from the side plate of the dump section.

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