Disinfection device

Abstract

To provide a sterilization apparatus capable of preventing infection of an infectious disease.SOLUTION: A sterilization apparatus includes: a detection device configured to detect a presence of a person in a sterilization area; an irradiation device capable of irradiation by invisible light of a first wavelength and irradiation by invisible light of a second wavelength different from the first wavelength; and a control device configured to control the irradiation device. The control device irradiates by the second wavelength when no person is present in the sterilization area, and sterilizes the sterilization area by the first wavelength when the person in the sterilization area has changed.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a disinfection device capable of disinfecting, for example, viruses. [Background technology]

[0002] Patent Document 1 discloses a cough detection device that detects which seat a person is coughing in by providing a motion detection unit and a sound detection unit corresponding to the seats in a room such as an office or classroom, or in a moving body such as a bus, train, or airplane. Patent Document 1 also discloses detecting an infectious disease based on the detection result of the cough detection device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-117708 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, Patent Document 1 only detects infectious diseases and does not disclose any measures to prevent the spread of infectious diseases.

[0005] Therefore, an object of the present invention is to provide a disinfection device capable of preventing the spread of infectious diseases. [Means for solving the problem]

[0006] The disinfection apparatus of the present invention comprises a detection device for detecting whether or not a person is present in a disinfection area, an irradiation device capable of irradiating with invisible light of a first wavelength and with invisible light of a second wavelength different from the first wavelength, and a control device for controlling the irradiation device, wherein the control device irradiates with the second wavelength when there is no person in the disinfection area, and disinfects the disinfection area using the first wavelength when the person has moved into the disinfection area. Effect of the Invention

[0007] According to the disinfection device of the present invention, the disinfection area can be disinfected efficiently. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram showing a towed scraper according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic diagram showing a control room of the towing vehicle of the first embodiment. [Diagram 3] FIG. 2 is a block diagram of the main parts of the first embodiment. [Figure 4] FIG. 2 is a flowchart showing a process executed by the control device of the first embodiment. [Diagram 5] FIG. 4 is a schematic diagram showing a rotary crushing device according to a second embodiment of the present invention. [Figure 6] FIG. 11 is a block diagram of the main parts of the second embodiment. [Figure 7] FIG. 11 is a flowchart showing a process executed by a control device according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A first embodiment of the present invention will be described in detail below with reference to the accompanying drawings. Note that the present invention is not limited to the embodiment described below.

[0010] (First embodiment) Fig. 1 is a schematic diagram showing a towed scraper 100 of this embodiment. The towed scraper 100 of this embodiment has a towing vehicle 1, which is a driving vehicle, and a scraper vehicle 20. As shown in Fig. 1, the towing vehicle 1 tows the scraper vehicle 20, and is connected to the scraper vehicle 20 by a hitch 21, which is a coupling device. The hitch 21 is detachable from the towing vehicle 1, and has a flexible ball joint 22 provided at one end on the towing vehicle 1 side, and a flexible ball joint (not shown) provided at the other end on the scraper vehicle 20 side.

[0011] (Towing vehicle) Fig. 2 is a schematic diagram showing the cockpit 2 of the towing vehicle 1. The cockpit 2 in Fig. 2 is a schematic diagram of the cockpit 2 as seen from the front side of the towing vehicle 1. Fig. 3 is a block diagram of the main parts of the cockpit 2 of this embodiment. Below, we will continue to explain the cockpit 2 using Figs. 2 and 3.

[0012] In this embodiment, the cockpit 2 has a driver's seat 3, a steering wheel 4, a gear shift lever 5, a turn signal 6, windshield wipers 7, an accelerator (not shown), a brake (not shown), etc. The cockpit 2 also has an illumination device 8 that illuminates the cockpit 2 with invisible light, a fluid supply device 9 that supplies fluid to the cockpit 2, and a sensor 10. Note that the layout of the elements of the driver's seat 3 is merely an example, and various modifications are possible, such as changing the layout on the left and right.

[0013] The towing vehicle 1 of this embodiment may be a dump truck, for example, an articulated dump truck. In such an articulated dump truck, the handle 4, the gear shift lever 5, the blinker 6, the wiper 7, the accelerator (not shown), and the brake (not shown) are well-known components, so a description of the components will be omitted. The handle 4, the gear shift lever 5, the blinker 6, the wiper 7, the accelerator (not shown), and the brake (not shown) may be collectively referred to as an operating unit 16 (see FIG. 3).

[0014] The irradiation device 8 is provided above the cockpit 2 (for example, on the ceiling or near the ceiling) and irradiates invisible light such as ultraviolet light from the rear side of the paper (the rear side in the X direction) toward the cockpit 2. In this embodiment, far-ultraviolet C waves with a wavelength of 205 to 230 nm are irradiated as ultraviolet light. This is because far-ultraviolet C waves with a wavelength of 205 to 230 nm do not reach human cells and do not harm the human body, but are thought to penetrate bacteria and viruses in the air and on the surface of objects and can disinfect them. By using far-ultraviolet C waves with a wavelength of 205 to 230 nm, invisible light can be irradiated from the irradiation device 8 even when a driver is in the driver's seat 3. It should be noted that ultraviolet light in a wavelength range other than 205 to 230 nm can be used if the irradiation device 8 is controlled to irradiate invisible light when there is no driver in the driver's seat 3. In this case, the ultraviolet light to be used is one that can penetrate bacteria and viruses and disinfect the area.

[0015] The irradiation device 8 irradiates the area where the driver comes into contact or the cockpit 2 (hereinafter collectively referred to as the disinfection area), and irradiates the driver's seat 3, the steering wheel 4, the gear shift lever 5, the blinker 6, the wiper 7, the accelerator (not shown), the brake (not shown), the door handle (not shown), the floor, and the like with far-ultraviolet-C waves. In order to irradiate such a disinfection area with far-ultraviolet-C waves, a plurality of irradiation devices 8 may be provided, or an irradiation device 8 may be provided on the floor side to irradiate far-ultraviolet-C waves from the floor side toward the ceiling side. In addition, an irradiation angle adjustment device 11 (see FIG. 3) may be provided to adjust the irradiation angle of the irradiation device 8 in the Y direction or Z direction. It is also possible to disinfect bacteria and viruses floating in the cockpit 2 by irradiating far-ultraviolet-C waves by the irradiation device 8.

[0016] An example of the fluid supply device 9 is a gas supply device that supplies compressed gas (e.g., air) to the disinfection area. Foreign matter such as soil may adhere to the hands and shoes of a driver who operates the towed scraper 100, and foreign matter such as soil may adhere to the disinfection area. Bacteria and viruses may adhere directly to the handle 4, for example, or to soil attached to the handle 4, or to both. The irradiation device 8 can disinfect bacteria and viruses attached to the surface of the soil, but may not be able to disinfect bacteria and viruses between the handle 4 and the soil.

[0017] For this reason, in this embodiment, after the irradiation device 8 disinfects bacteria and viruses adhering to the surface of the soil, the fluid supply device 9 blows away the disinfected soil with compressed gas. The irradiation device 8 irradiates the disinfected area from which the soil has been blown away with far-ultraviolet C waves, thereby disinfecting bacteria and viruses directly adhering to the operating unit 16 such as the handle 4.

[0018] The fluid supply device 9 may supply a disinfectable liquid to the disinfection area instead of compressed gas or in combination with compressed gas. As the disinfectable liquid, various types of liquids such as alcohol, aldehyde, chlorine, iodine, oxidizer, and quaternary ammonium salt can be used. In this embodiment, an alcohol-based disinfectant is used when the driver is in the driver's seat 3, and a non-alcohol-based disinfectant is used when the driver is not in the driver's seat 3. This prevents harm to the driver's body. In this case, the fluid supply device 9 may be provided with multiple containers, one container may contain an alcohol-based disinfectant, and the other container may contain a non-alcohol-based disinfectant, and the disinfectant in one container may be selected from the multiple containers depending on whether the driver is present or not. The number of containers may be three or more, and two or more types of disinfectant may be supplied. Even when using a disinfectant that is not harmful to the driver's body, the fluid supplying device 9 preferably supplies the disinfectant so as not to splash the disinfectant on the driver, particularly on the driver's face. Note that the fluid supplying device 9 preferably sprays the disinfectant in a mist form using a spray nozzle.

[0019] The fluid supply device 9 is used to disinfect the disinfection area in order to efficiently disinfect the disinfection area and to disinfect the disinfection area where the far-ultraviolet-C waves are blocked by the handle 4 or the like and are not irradiated with the far-ultraviolet-C waves. The irradiation angle adjustment device 11 may adjust the irradiation angle of the irradiation device 8 so that the far-ultraviolet-C radiation is not blocked. Also, a supply angle adjustment device 12 (see FIG. 3) may be provided to adjust the supply angle of the fluid supplied by the fluid supply device 9 in the Y direction or Z direction.

[0020] Although two fluid supply devices 9 are shown in FIG. 2, one may be a gas supply device that supplies compressed gas, and the other may be a liquid supply device that supplies disinfectant liquid. In addition, both of them may be gas supply devices, or both of them may be liquid supply devices. In addition, the fluid supply device 9 may supply both compressed gas and disinfectant. The number of the fluid supply devices 9 may be one or three or more, and the fluid supply devices 9 may be arranged on the floor. In addition, the irradiation device 8 and the fluid supply device 9 may be unitized into one device.

[0021] The sensor 10 is a sound detection unit such as a microphone as described in JP 2018-117708 A, and detects the driver's coughing or sneezing. Based on the output of the sensor 10, it is possible to detect whether the sound signal detected by the sensor 10 is a cough or a sneeze by frequency analysis of the sound signal. In this case, the sound signal detected by the sensor 10 may be wirelessly transmitted to a host computer, and the frequency analysis may be performed by the host computer, or the frequency analysis may be performed by the control device 15 (see FIG. 3).

[0022] A motion detection unit having an acceleration sensor as described in JP 2018-117708 A may be provided as the sensor 10 to detect the driver's coughing or sneezing. In this case, the acceleration sensor is preferably provided in the driver's seat 3. Acceleration values ​​and patterns when a person coughs or sneezes are stored as references in the memory of the host computer or in the memory 13 (see FIG. 3) on the towing vehicle 1 side, and it is possible to detect whether the driver has coughed or sneezed by comparing this with the acceleration detected by the acceleration sensor.

[0023] By providing both a microphone and an acceleration sensor as the sensor 10, it is possible to accurately detect the driver's coughing or sneezing. The number of microphones and acceleration sensors may be one or more, and their locations may be set arbitrarily, but it is preferable to provide the microphone in front of the driver (on the side facing the driver's face). In order to reduce the cost of the towing vehicle 1, the sensor 10 may be either a microphone or an acceleration sensor.

[0024] Also, a thermometer may be installed as the sensor 10. In this case, the thermometer may be lowered from the ceiling when the driver sits in the driver's seat so as to face the driver's forehead. The thermometer is preferably a non-contact thermometer, and for example, a thermometer using infrared rays may be used, but is not limited to this. In order to prevent soil from adhering to the sensor 10, the sensor 10 may be covered with a cover except when the sensor 10 is performing detection, and the cover may be opened when the sensor 10 is performing detection.

[0025] If at least one of the irradiation device 8 and the fluid supply device 9 is driven at the timing when the sensor 10 detects the driver's cough or sneeze, even if bacteria or viruses are contained in the cough or sneeze, the bacteria or viruses can be instantly disinfected. Also, if at least one of the irradiation device 8 and the fluid supply device 9 is driven when the sensor 10 detects the driver's fever, the bacteria or viruses contained in the driver's breath can be instantly disinfected.

[0026] The memory 13 is a non-volatile memory (e.g., a flash memory) and stores various data such as the acceleration values ​​and patterns described above, the disinfection history of the cockpit 2, and data for driving the towing vehicle 1. The memory 13 also stores a program for driving the towing vehicle 1 and various other programs such as the flowchart of Fig. 4 described below.

[0027] The communication device 14 is a wireless communication unit that accesses a host computer or a wide area network such as the Internet, and in this embodiment, transmits the detection result of the sensor 10, the irradiation history of the irradiation device 8, the supply history of the fluid supply device 9, the operation history of the operation unit 16, etc. to the host computer. Note that the detection result of the sensor 10, the irradiation history of the irradiation device 8, the supply history of the fluid supply device 9, the operation history of the operation unit 16, etc. may be stored in the memory 13.

[0028] The control device 15 has a CPU, and in addition to controlling the towing vehicle 1 and the scraper vehicle 20, performs control for disinfecting bacteria and viruses in the cockpit 2. The control by the control device 15 for disinfecting bacteria and viruses in the cockpit 2 will be described later.

[0029] (Scraper vehicle) Returning to FIG. 1, the scraper vehicle 20 includes, in addition to the hitch 21 and ball joint 22 described above, a frame 23, a bowl 24, a scraper 25, an axle 26, wheels 27, etc.

[0030] The frame 23 is a metal frame that supports structures such as a bowl 24. The bowl 24 has an open top and contains excavated material such as soil and sand excavated by a scraper 25. The scraper 25 is a blade-like or spatula-like member for scraping off soil and sand from a travel surface such as the ground surface, and in this embodiment, is provided integrally with the bowl 24 at the bottom thereof. Since the bowl 24 and the scraper 25 are provided integrally, the scraper 25 can dig into the ground and excavate earth and sand by tilting the bowl 24 toward the ground with a hydraulic cylinder (not shown). Also, the bowl 24 is provided with an opening (not shown), and when the bowl 24 is inclined toward the ground, the material excavated by the scraper 25 is received in the bowl 24 through the opening (not shown).

[0031] When excavation by the scraper 25 is completed, the bowl 24 is tilted toward the ground by a hydraulic cylinder (not shown), so that the scraper 25 is separated from the ground.

[0032] The axle 26 rotates due to the traction force of the towing vehicle 1, and the wheels 27 are connected to both ends of the axle 26 and are a pair of driven wheels that rotate with the rotation of the axle. The wheels 27 may be provided at the front and rear of the scraper vehicle 20 as the front and rear wheels.

[0033] (Flowchart explanation) The control for disinfecting bacteria and viruses in the cockpit 2 by the control device 15 of this embodiment configured as described above will be described below with reference to the flowchart of Fig. 4. Note that this flowchart is executed when the engine of the towing vehicle 1 is started.

[0034] The control device 15 performs detection using the sensor 10 to detect whether the driver has coughed or sneezed (step S1). In this step S1, the control device 15 may detect the body temperature of the driver. Since a plurality of drivers may take turns driving the towing vehicle 1, a face recognition device may be provided in front of the driver's seat 3 to recognize the face of the driver and link the output of the sensor 10 to the driver. In this case, data on the face of the driver may be registered in the memory 13. In this step S1, the control device 15 may store in the memory 13 the operations performed by the driver on the operation unit 16.

[0035] The control device 15 determines whether to perform disinfection based on whether the driver has coughed or sneezed, or whether the driver has a fever (step S2). In this example, it is assumed that the driver has neither a fever nor coughed or sneezed, and the process proceeds to step S3.

[0036] The control device 15 determines whether the engine of the towing vehicle 1 is running (step S3). Here, it is assumed that the engine of the towing vehicle 1 is running, so step S1 is executed again and the process proceeds to step S2.

[0037] Here, the control device 15 determines that the driver has coughed or sneezed based on the detection result of the sensor 10, and proceeds to step S4.

[0038] The control device 15 drives the irradiation device 8 and the fluid supply device 9 to disinfect the cockpit 2 (step S4). Here, if the fluid supply device 9 is a gas supply device, the control device 15 causes the irradiation device 8 to irradiate the operating unit 16 with far-ultraviolet C rays prior to the gas supply device supplying gas. This makes it possible to prevent soil that has not yet been disinfected and may contain bacteria or viruses from spreading into the cockpit 2. Note that an intake port may be provided in the cockpit 2 so that the cockpit 2 can be ventilated using a ventilation device (not shown).

[0039] The control device 15 disinfects the soil adhering to the operation unit 16 using the irradiation device 8, and then removes the soil using the gas supply device. The control device 15 then irradiates the operation unit 16 from which the soil has been removed with far-ultraviolet-C light having a wavelength of 205 to 230 nm, preferably a wavelength of around 222 nm, using the irradiation device 8.

[0040] In step S4, the control device 15 drives the irradiation angle adjustment device 11 to disinfect the entire cockpit 2, thereby disinfecting bacteria and viruses floating in the cockpit 2. In addition, since there is a possibility that bacteria or viruses are attached to the driver's hands, the control device 15 disinfects the operation unit 16 that the driver has touched, based on the operation history stored in the memory 13.

[0041] In addition, droplets from the driver's cough or sneeze will adhere to the front surface of the cockpit 2, so the control device 15 disinfects the front surface of the cockpit 2 with the irradiation device 8. In this case, the control device 15 irradiates the front surface of the cockpit 2 and the operating unit 16 touched by the driver with far-ultraviolet-C waves for a longer period of time than the control device 15 irradiates other parts with far-ultraviolet-C waves.

[0042] The irradiation time of far-ultraviolet-C waves by the irradiation device 8 can be set to between a few seconds and a few minutes depending on the intensity of the far-ultraviolet-C waves. In order to reliably disinfect bacteria and viruses in the cockpit 2, it is preferable to set the irradiation time of far-ultraviolet-C waves by the irradiation device 8 longer than the supply time of gas to the gas supply device. Note that the supply of gas by the gas supply device may be omitted, or the gas supply device itself may be omitted.

[0043] When the fluid supply device 9 is a liquid supply device that supplies a disinfectant, the control device 15 can quickly disinfect the entire cockpit 2 by simultaneously performing the irradiation of far-ultraviolet-C waves by the irradiation device 8 and the supply of a disinfectant (e.g., an alcohol-based or quaternary ammonium salt-based) by the liquid supply device. The irradiation time of far-ultraviolet-C waves by the irradiation device 8 and the supply time of disinfectant by the liquid supply device may be the same, or the irradiation time of far-ultraviolet-C waves by the irradiation device 8 may be longer. Also, the supply of liquid by the liquid supply device may be omitted, or the liquid supply device itself may be omitted.

[0044] After performing the disinfection in step S4, the control device 15 proceeds to step S3 (step S5). The control device 15 determines whether the engine of the towing vehicle 1 is running (step S5). Here, it is assumed that the engine of the towing vehicle 1 is stopped, and the process proceeds to step S6.

[0045] The control device 15 checks the disinfection history stored in the memory 13 and the operation history of the operation unit 16 (step S6). The control device 15 determines that disinfection should be performed if a predetermined time has passed since the previous disinfection or if the driver has changed, and otherwise determines that disinfection is not necessary (step S7). If the control device 15 determines that disinfection is not necessary, it ends this flow chart.

[0046] If the control device 15 determines in step S7 that disinfection is to be performed, it detects whether the driver has left the towing vehicle 1. Specifically, it determines whether the driver has left the towing vehicle 1 based on at least one of the detection results that the locking of the towing vehicle 1 is detected, the face cannot be detected by the face recognition device described above, and a load sensor (not shown) provided in the driver's seat 3 does not detect a load of, for example, 40 kg or more.

[0047] When the control device 15 detects that the driver is not in the cockpit 2, it performs disinfection (step S8). When performing disinfection using the irradiation device 8, the control device 15 performs irradiation by increasing the intensity of the irradiation device 8 compared to the disinfection in step S4, or by using ultraviolet light with a wavelength other than 205 to 230 nm. If the irradiation device 8 has a wavelength setting function, the wavelength can be switched according to this wavelength setting function. Also, irradiation devices 8 with different wavelength ranges may be provided.

[0048] When disinfection is performed using the liquid supply device, the control device 15 may disinfect the inside of the cockpit 2 using a disinfectant other than an alcohol-based or quaternary ammonium salt-based disinfectant. Although the engine of the towing vehicle 1 is turned off when step S8 is performed, there is no problem if the irradiation device 8 and the fluid supply device 9 are driven by a battery (not shown).

[0049] Although the first embodiment has been described above, the above embodiment can be applied to vehicles other than the towing vehicle 1, for example, evacuation shelters. Furthermore, the towing vehicle 1 is not limited to dump trucks, but can be widely applied to bulldozers, loaders, shovel-type excavators, hole-boring machines, and the like.

[0050] Second Embodiment The second embodiment will be described below, but the same components as those in the first embodiment will be given the same reference numerals and their description will be omitted or simplified. In this embodiment, a disinfection device is applied to a construction machine (e.g., a rotary crusher). FIG. 5 is a schematic diagram showing a rotary crusher 200 of this embodiment, and FIG. 6 is a block diagram of the main parts of this embodiment. The rotary crusher 200 will be described below with reference to FIG. 5 and FIG. 6.

[0051] (Rotary crusher) The rotary crushing device 200 of this embodiment is a device used for improving and effectively utilizing raw soil such as construction waste soil. The rotary crushing device 200 crushes and refines the raw soil, dispersing the raw soil finely and homogeneously. In addition, additives (lime-based solidification materials such as quicklime and slaked lime, cement-based solidification materials such as ordinary cement and blast furnace cement, soil improvement materials made of polymer materials, natural fibers, etc.) are also added to the rotary crushing device 200 as necessary. When additives are added, the rotary crushing device 200 mixes the raw soil and additives to prepare improved soil, thereby adjusting the properties, strength, etc. of the improved soil.

[0052] As shown in FIG. 5, the rotary crushing apparatus 200 includes a stand 50, a fixed drum 52, a rotating drum 54, and a rotating mechanism 56.

[0053] The stand 50 holds each part of the rotary crushing device 200 and has a top plate 50a and legs 50b. The top plate 50a is, for example, a plate-like member made of iron, and functions as a lid that closes the upper opening of the fixed drum 52 fixed to the lower surface (the surface on the -Z side). The top plate 50a is provided with an inlet member 31 for feeding raw soil and additives (hereinafter, the raw soil and additives are referred to as the treatment target) into the fixed drum 52.

[0054] The fixed drum 52 is a cylindrical container, and is fixed to the lower surface (-Z side surface) of the top plate portion 50a. The object to be treated is put into the fixed drum 52 through the inlet member 31, and the object to be treated is guided into the rotating drum 54 provided on the lower side (-Z side) of the fixed drum 52.

[0055] The rotating drum 54 is a cylindrical container, and rotates (spins) around the central axis of the cylinder (around the Z-axis) by a rotating drum drive motor (not shown). The rotating drum 54 is supported by the frame 50 via a plurality of support rollers 33, so that it receives the rotational force of the rotating drum drive motor and rotates smoothly. The rotating direction of the rotating drum 54 and the rotating direction of the impact member 34 may be the same or opposite.

[0056] A scraping bar (not shown) is provided inside the rotating drum 54. This scraping bar is in contact with the inner circumferential surface of the rotating drum 54 and is fixed to the fixed drum 52. Therefore, when the rotating drum 54 rotates, the scraping bar moves relatively along the inner circumferential surface of the rotating drum 54. As a result, even if the treatment target adheres to the inner circumferential surface of the rotating drum 54, the treatment target is scraped off by the scraping bar as the rotating drum 54 rotates. That is, the scraping bar and the rotating drum 54 that moves relative to the scraping bar function as a scraping unit that scrapes off the treatment target adhered to the inner circumferential surface of the rotating drum 54.

[0057] The rotation mechanism 56 has a rotating shaft 30 extending in the vertical direction (Z-axis direction) positioned at the center of the fixed drum 52 and the rotating drum 54, a pulley 32 provided at the upper end of the rotating shaft 30, and two-stage impact members 34 provided in two stages, one above the other, near the lower end of the rotating shaft 30.

[0058] The rotating shaft 30 is a cylindrical member, and is supported by the top plate 50a of the stand 50 in a state in which it penetrates the top plate 50a and is rotatable via two ball bearings 36a, 36b provided on the upper surface of the top plate 50a. A spacer 38 is provided between the two ball bearings 36a, 36b, and a predetermined distance is formed between the ball bearings 36a, 36b. The lower end of the rotating shaft 30 is located inside the rotating drum 54 and is a free end. In other words, the rotating shaft 30 is supported in a cantilevered manner.

[0059] The impact member 34 is centrifugally rotated by the rotation of the rotating shaft 30, and the thick plates 42 move at high speed near the inner circumferential surface of the rotating drum 54, thereby crushing and mixing the materials to be treated. For this reason, the rotary crushing device 200 can also be called a rotary crushing and mixing device. The number of chains 40 and thick plates 42 of the impact member 34 can be adjusted depending on the type and properties of the raw soil, the amount to be treated, the type and amount of additives, the target quality of the improved soil, etc.

[0060] In the rotary crushing device 200 of this embodiment, the material to be treated is fed into the fixed drum 52 through the feed inlet member 31, crushed and mixed by the impact member 34 inside the rotating drum 54, and discharged below the rotating drum 54.

[0061] In this embodiment, two each of the irradiation devices 8, the fluid supply devices 9, and the sensors 10 are provided on the lower surface side of the top plate portion 50a. The number of the irradiation devices 8, the fluid supply devices 9, and the sensors 10 may be one or three or more. The mounting positions of the irradiation devices 8, the fluid supply devices 9, and the sensors 10 in the X and Y directions can also be set appropriately.

[0062] In this embodiment, the irradiation device 8, the fluid supply device 9, and the sensor 10 are provided on the underside of the non-rotating top plate portion 50a, instead of the rotating drum 54, so that it is possible to reduce the possibility of the crushed raw soil colliding with the irradiation device 8, the fluid supply device 9, and the sensor 10, causing the irradiation device 8, the fluid supply device 9, and the sensor 10 to break down. However, there is a risk that additives will fly up to the underside of the top plate portion 50a, or that the raw soil or additives put into the inlet member 31 will hit the irradiation device 8, the fluid supply device 9, and the sensor 10.

[0063] Therefore, in this embodiment, a cover 39 is provided to protect the irradiation device 8, the fluid supply device 9, and the sensor 10, and covers the irradiation device 8, the fluid supply device 9, and the sensor 10 except when the irradiation device 8, the fluid supply device 9, and the sensor 10 are driven, and the cover is opened by a cover drive unit 41 when the irradiation device 8, the fluid supply device 9, and the sensor 10 are driven.

[0064] 5, the cover 39 protects the irradiation device 8, the fluid supply device 9, and the sensor 10, but the cover 39 may be provided for each of the irradiation device 8, the fluid supply device 9, and the sensor 10. By using iron or stainless steel as the material for the cover 39, it is possible to prevent the cover 39 from being broken by the raw soil crushed by the impact member 34.

[0065] When the rotary crushing device 200 is stopped, a worker may enter the rotating drum 54 from a path not shown in the figure to perform maintenance work such as cleaning the rotating drum 54 or replacing the chain 40 or thick plates 42 of the impact member 34.

[0066] Therefore, in this embodiment, when a worker enters the rotating drum 54, the sensor 10 detects the worker's coughing or sneezing, and when a coughing or sneezing is detected, the irradiation device 8 and the fluid supply device 9 are driven to disinfect the inside of the rotating drum 54. Thus, in this embodiment, the inside of the rotating drum 54 is a disinfection area.

[0067] (Flowchart explanation) The control for disinfecting bacteria and viruses in the maintenance area by the control device 15 of this embodiment configured as above will be described with reference to the flowchart of Fig. 7. This flowchart is executed when maintenance of the rotary crusher 200 is started.

[0068] The control device 15 drives the cover driving unit 41 to open the cover 39 (step S1). Next, the control device 15 performs detection using the sensor 10 to detect whether the worker has coughed or sneezed (step S2).

[0069] The control device 15 determines whether to perform disinfection based on whether the worker has coughed or sneezed (step S3). In this example, it is assumed that the worker does not have a fever and has not coughed or sneezed, and the process proceeds to step S4.

[0070] The control device 15 judges whether the maintenance is completed (step S4). Here, it is assumed that the maintenance is continuing, and step S2 is executed again and the process proceeds to step S3. The start and end of the maintenance can be determined by providing a human sensor (e.g., an infrared sensor) in the rotary crushing device 200 to determine whether an operator is present inside the rotating drum 54.

[0071] Here, the control device 15 determines that the worker has coughed or sneezed based on the detection result of the sensor 10, and proceeds to step S5 (step S3).

[0072] The control device 15 drives the irradiation device 8 and the fluid supply device 9 to disinfect the inside of the rotating drum 54 (step S5). Here, when the fluid supply device 9 is a gas supply device, the control device 15 causes the irradiation device 8 to irradiate the inside of the rotating drum 54 with far-ultraviolet C rays prior to the gas supply by the gas supply device. This makes it possible to prevent soil that has not yet been disinfected and has bacteria or viruses attached thereto from diffusing into the rotating drum 54. Note that an intake port may be provided in the rotating drum 54 to ventilate the inside of the rotating drum 54 using a ventilation device (not shown).

[0073] The control device 15 disinfects soil adhering to the impact member 34, the inner wall of the rotating drum 54, etc. using the irradiation device 8, and then removes the soil using the gas supply device.The control device 15 then irradiates the impact member 34 and the inner wall of the rotating drum 54 from which the soil has been removed with far-ultraviolet-C rays having a wavelength of 205 to 230 nm, preferably a wavelength of around 222 nm, using the irradiation device 8.

[0074] In step S5, the control device 15 drives the irradiation angle adjustment device 11 to disinfect the entire inside of the rotating drum 54, thereby disinfecting bacteria and viruses floating inside the rotating drum 54.

[0075] In addition, droplets from the worker's cough or sneeze may adhere to the side wall of the rotating drum 54 and the impact member 34, so the control device 15 causes the irradiation device 8 to disinfect the side wall of the rotating drum 54 and the impact member 34.

[0076] When the fluid supply device 9 is a liquid supply device that supplies a disinfectant, the control device 15 can quickly disinfect the entire rotating drum 54 by simultaneously irradiating far-ultraviolet-C rays by the irradiation device 8 and supplying a disinfectant (e.g., an alcohol-based or quaternary ammonium salt-based disinfectant) by the liquid supply device.

[0077] After performing the disinfection in step S5, the control device 15 proceeds to step S4 (step S6). The control device 15 determines whether the maintenance is completed (step S4). Here, it is assumed that the maintenance is completed, and the process proceeds to step S7.

[0078] The control device 15 checks the disinfection history and operation history (parts replacement history) stored in the memory 13 (step S7). The control device 15 determines that disinfection should be performed if a predetermined time has passed since the previous disinfection or if the operator has changed, and otherwise determines that disinfection is not necessary (step S8). If the control device 15 determines that disinfection is not necessary, the process proceeds to step S10.

[0079] When it is determined in step S8 that disinfection is to be performed, the control device 15 detects whether or not the operator has gone outside the rotating drum 54. This detection can be performed using the above-mentioned human sensor.

[0080] When the control device 15 detects that the operator is not in the rotating drum 54, it performs disinfection (step S9). When performing disinfection by the irradiation device 8, the control device 15 performs irradiation by increasing the intensity of the irradiation device 8 compared to the disinfection in step S5, or by using ultraviolet light with a wavelength other than 205 to 230 nm.

[0081] When disinfection is performed by the liquid supplying device, the control device 15 may disinfect the inside of the rotating drum 54 using a disinfectant other than an alcohol-based or quaternary ammonium salt-based disinfectant. The control device 15 closes the cover 39 by the cover driving unit 41, and ends this flow chart. This embodiment can be widely applied to construction machines such as pile drivers and shield machines.

[0082] The above-described embodiment is merely an example for explaining the present invention, and various modifications can be made within the scope of the present invention. Specifically, the thermometer and face recognition device described in the first embodiment may be applied to the second embodiment. The first and second embodiments may be used in combination as appropriate. The control device 15 may increase the irradiation time of the irradiation device 8 or increase the amount of fluid supplied by the fluid supply device 9 in response to an increase in the number of times the sensor 10 detects coughing or sneezing. The control device 15 may increase the irradiation time of the irradiation device 8 or increase the amount of fluid supplied by the fluid supply device 9 in response to an increase in the volume of the coughing or sneezing detected by the sensor 10. [Explanation of symbols]

[0083] 1 Towing vehicle 2 Cockpit 3 Driver's seat 8 Irradiation device 9 Fluid supply device 10 Sensor 15 Control device 16 Operation unit 20 Scraper vehicle 34 Impact member 50 Stand 54 Rotating drum 100 Towed scraper 200 Rotary Crusher

Claims

1. A detection device for detecting whether a person is present in the disinfection area; An irradiation device capable of irradiating invisible light having a first wavelength and irradiating invisible light having a second wavelength different from the first wavelength; A control device for controlling the irradiation device, The control device irradiates the disinfection area with the second wavelength when there is no person in the disinfection area, and disinfects the disinfection area using the first wavelength when the person has moved into the disinfection area.

2. The disinfection apparatus according to claim 1, further comprising a face recognition device for recognizing the face of the person.

3. The disinfection apparatus according to claim 1 or 2, wherein the irradiation device irradiates invisible light having a wavelength of 205 to 230 nm as the first wavelength, and irradiates invisible light having a wavelength other than 205 to 230 nm as the second wavelength.

4. The disinfection apparatus according to claim 1 , wherein the control device controls an irradiation time of the irradiation device.

5. A disinfection apparatus according to any one of claims 1 to 4, wherein the detection device is an infrared sensor.

6. The disinfection apparatus according to any one of claims 1 to 5, further comprising a memory for storing an irradiation history of the irradiation device.

7. The disinfection apparatus according to claim 1 , wherein a plurality of the irradiation devices are provided in the disinfection area.

8. an irradiation angle adjustment device for adjusting an irradiation angle of the irradiation device; 8. The disinfection apparatus according to claim 1, wherein the irradiation angle adjustment device is driven during irradiation by the irradiation device to disinfect floating viruses.

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