JP2022103687A - Infection preventive system and infection preventive method - Google Patents

Abstract

To provide an infection preventive system and an infection preventive method that reduce the risk of infection even in the indoor space with frequent human contacts.SOLUTION: An infection preventive system 11 has a temperature check and disinfection device 12, a mask 13 and a mask case 14, and a discharge device 18. The temperature check and disinfection device 12 has a detection unit 21 that detects the body temperature, a display unit 22 that displays the body temperature detected by the detection unit 21, and a discharge unit 23 that discharges a first disinfectant for disinfecting fingers and is disposed on the path of a flow ML from outside the room OD. The mask 13 and the mask case 14 are disposed downstream from the temperature check and disinfection device 12 on the path of the flow ML. The discharge device 18 is disposed downstream from the mask 13 and the mask case 14 on the path of the flow ML and discharges a second disinfectant for disinfecting fingers.SELECTED DRAWING: Figure 1

Description

The present invention relates to an infection control system and an infection control method.

More disinfectants and infectious disease protection systems have been proposed for various infectious diseases. For example, Patent Document 1 discloses a disinfectant for coronavirus having a hinokitiol content of 0.02 to 0.2% by mass. Further, Patent Document 2 is an infectious disease prevention system that uses a compressor to generate an antibacterial agent in the form of a mist in a closed space into which a straw discharge port is inserted from a liquid tank into which a straw is inserted and discharges the antibacterial agent. It is disclosed in.

Japanese Unexamined Patent Publication No. 2005-134864 Japanese Unexamined Patent Publication No. 2017-74211

However, even if the above-mentioned various disinfectants and infectious disease protection systems are used, they are often infected with infectious diseases caused by bacteria and viruses. In particular, in indoor spaces such as stores and rental rooms where many people come and go, the risk of infection cannot be reduced unless the opportunities for contact between people are suppressed.

Therefore, an object of the present invention is to provide an infection control system and an infection control method that reduce the risk of infection even in an indoor space where there are many opportunities for contact between people.

The infection control system of the present invention includes a temperature measuring and disinfecting device, a mask and a mask case, and a discharging device. The temperature measurement disinfection device has a detection unit that detects the body temperature, a display unit that displays the body temperature detected by the detection unit, and a discharge unit that discharges the first disinfectant liquid that disinfects the fingers, and is on the flow line from the outside. Is placed in. The mask and the mask case are arranged downstream from the temperature measuring and disinfecting device in the flow line, and the mask case houses the used mask. The discharge device is arranged downstream of the mask and the mask case in the flow line, and discharges the second disinfectant liquid that disinfects the fingers.

The temperature measuring and disinfecting device has a sensor for detecting the finger, and discharges the first disinfectant solution when the finger is detected by the sensor.

It is further preferable to provide an ultraviolet irradiation device that emits ultraviolet rays and disinfects the irradiated area irradiated with the ultraviolet rays.

It is preferable to further provide a spraying device that continuously ejects chlorine dioxide in the form of a mist.

Further equipped with a sterilizing tool that is placed in the vicinity of the discharge device, is made of a non-woven fabric, woven fabric, or paper impregnated with water, and sterilizes the sterilized object by wiping the sterilized object. Is preferable.

The infection control method of the present invention includes a temperature measurement disinfection step, a mask replacement step, and a discharge disinfection step. The temperature measurement and disinfection step has a detection unit that detects the body temperature, a display unit that displays the body temperature detected by the detection unit, and a discharge unit that discharges the first disinfectant liquid that disinfects the fingers, and is on the flow line from the outside. The body temperature is measured and disinfected by the temperature measuring and disinfecting device installed in. In the mask replacement process, the used mask is housed in the mask case and a new mask is attached, downstream of the temperature measuring and disinfecting device in the flow line. In the discharge disinfection step, after the mask replacement step, the fingers are disinfected with the second disinfectant liquid discharged by the discharge device.

According to the present invention, the risk of infection can be reduced even in an indoor space where there are many opportunities for humans to come into contact with each other.

It is a schematic diagram of an infection control system. It is a schematic diagram of an infection control system. It is explanatory drawing of the processing by a sprayer and an ultraviolet irradiation apparatus.

The flow of bacteria and viruses from outdoors (including outdoors) to indoors (including indoors when the outdoors are outdoors) and indoors is generally as follows. For example, people who carry bacteria and viruses are not only inside their bodies, but also their clothing (clothes, shoes, gloves, masks, etc.) and their belongings (bags, smartphones and tablet terminals, handheld game consoles, credit cards). Various mobile devices such as payment terminals, pens, etc.) are brought into the room with bacteria and viruses attached. People who carry bacteria and viruses may not have symptoms of infectious diseases such as those bacteria and viruses, and may not be confirmed to be infected by tests, etc., but for convenience here. Called a "positive person". A positive person releases saliva containing bacteria, viruses, etc. into the air as an aerosol by vocalization during conversation or coughing. Bacteria and viruses in droplets enter the body of other people in the room, either directly or through surrounding objects (droplet infection). Positive individuals also bring bacteria, viruses, etc. into the room through their hands, wear, and items they bring, and the bacteria and viruses brought in in this way can also cause infections of other people ( Contact infection). It is well known that various infection forms such as droplet infection and contact infection differ depending on bacteria, viruses, and the like, and the following infection forms comprehensively describe various bacteria, viruses, and the like.

For example, a positive person enters a store such as a restaurant, causes splashes due to conversation, etc., and directly or indirectly infects another person as described above. In addition, a positive person attaches bacteria, viruses, etc. to the table by touching the table with his / her hand, and infects the person through the skin of another person who touches the table (contact infection). .. In addition, when a positive person uses a toilet or a washroom, it adheres to and infects the hands of other people who have used it afterwards through the excrement of the positive person or the object of contact (contact infection).

In addition, if a positive person puts a mask or belongings that he or she had worn on the table or touches the doorknob, it will adhere to the skin of another person through the table or doorknob and cause infection. sell. Bacteria and viruses adhering to the wear of positive persons are transmitted through chairs, etc., and bacteria and viruses adhering to the belongings are passed through chairs, tables, etc., and other bacteria that have touched those chairs and tables. It adheres to human hands and can be infected.

The infection control system 11 shown in FIG. 1 is an embodiment of the present invention, and the infection control system 11 includes a temperature measuring and disinfecting device 12, a mask kit 17 having a mask 13 and a mask case 14, and a discharge device 18. .. The temperature measuring and disinfecting device 12, the mask kit 17, and the discharging device 18 are arranged in this order on the flow line ML of the person from the outdoor OD to the indoor ID. The indoor ID may be a partitioned space inside the building, or may be the inside of the building partitioned from the outside. The outdoor OD may be a common space such as a corridor when a store or the like is regarded as a room, which is formed by partitioning in the building, or may be outdoors.

The temperature measuring and disinfecting device 12 detects the human body temperature and disinfects the fingers. Although the temperature measuring and disinfecting device 12 is arranged in the outdoor OD in the example shown in FIG. 1, it may be arranged in the indoor ID. The temperature measuring and disinfecting device 12 includes a detection unit 21, a display unit 22, and a discharge unit 23. In this example shown in FIG. 1, the temperature measuring and disinfecting device 12 is a so-called stand type that stands on the floor or the ground. The size is 115 mm in width and 132 mm in depth, and the height can be adjusted in the range of 690 mm to 1220 mm. However, the temperature measuring and disinfecting device 12 may be, for example, a so-called wall-mounted type provided on the wall surface of a building, or a so-called stationary type mounted on a table (not shown). Although the temperature measuring and disinfecting device 12 is operated by a battery, it may be operated by a rechargeable battery or may use electric power supplied from an external power source.

The detection unit 21 causes the display unit 22 to display a sensor (not shown) that detects the temperature of a person's palm or wrist, a detection circuit (not shown) that obtains a body temperature based on the detected temperature, and a obtained body temperature. It has a control unit (not shown). As a result, when the palm or wrist is held over the sensor, the detection unit 21 detects the human body temperature and displays it on the display unit 22 by obtaining the body temperature based on the detected temperature. The display unit 22 displays the body temperature detected by the detection unit 21. In this way, the temperature measuring and disinfecting device 12 detects the human body temperature in a non-contact manner, so that infection by a virus or a bacterium at the time of temperature measurement can be prevented. The body temperature may be displayed as a numerical value, or may be displayed by turning on a light (LED light or the like) in a color corresponding to the temperature. For example, it may be configured so that a light of 37.2 ° C. or lower is green, a light of 37.3 ° C. or higher and 38.0 ° C. or lower is yellow, and a light of 38.1 ° C. or higher is red is lit. With this temperature measuring and disinfecting device 12, it is possible to take measures such as restricting entry to a person whose body temperature is suspected to be infected, so that infection with an indoor ID can be suppressed in advance.

The temperature measuring disinfection device 12 includes a storage unit (not shown) for storing the first disinfectant liquid for disinfecting human hands and fingers, and the discharge unit 23 discharges the first disinfectant liquid of the storage unit (not shown). The temperature measuring and disinfecting device 12 preferably has a sensor for detecting a human finger in the vicinity of the discharge unit 23, and when the finger is detected by the sensor, for example, a predetermined amount (approximately 0.5 ml in this example) of the first disinfection. Discharge the liquid. The first disinfectant is, for example, an aqueous alcohol solution. As a result, the hands and fingers can be disinfected without contacting the temperature measuring and disinfecting device 12, so that infection through the temperature measuring and disinfecting device 12 can be prevented. In addition, regardless of whether the person trying to enter the room is a positive person or not, the temperature measuring disinfection device 12 disinfects the fingers, so that bacteria and viruses adhering to the fingers are suppressed from entering the room ID. Will be done. In this way, the body temperature is measured and disinfected by the temperature measuring and disinfecting device 12 arranged on the flow line ML from the outdoor OD (temperature measuring and disinfecting step).

The mask kit 17 arranged downstream of the temperature measuring and disinfecting device 12 in the flow line ML is a used mask (hereinafter referred to as a used mask) worn by a person who has measured and disinfected the temperature by the temperature measuring and disinfecting device 12 until then. It is intended to replace (referred to as) with a new mask 13. The mask 13 and the mask case 14 are each housed in, for example, a transparent plastic bag, and the mask 13 in the bag is put in a plurality of containers, and the mask case 14 in the bag is a plurality. It is in a container. However, the mask 13 and the mask case 14 may be stacked flat on a table 26 or the like. The mask case 14 is for accommodating used masks. As a result, the person who disinfects the fingers with the temperature measurement disinfection device 12 can replace the mask (mask replacement step), and the used mask that may be contaminated with bacteria or virus remains exposed in the indoor ID. Never become. Further, since the used mask is housed in the mask case 14, bacteria and viruses adhering to the used mask are suppressed from adhering to various parts of the indoor ID (table, chair, etc.), and the used mask is used in the indoor ID. Infection via the virus is suppressed. The mask kit 17 is preferably arranged in the indoor ID, but may be arranged in the outdoor OD.

The mask 13 is not particularly limited, and in this example, it has a mask body (not shown) having a two-layer structure in which two non-woven fabrics are overlapped, and is thin. On the side of the mask body, an ear hook that is made of elastically deformable gauze or non-woven fabric and expands and contracts is provided.

The mask case 14 can accommodate a commercially available mask of a general size (for example, a mask made of a non-woven fabric) and is a case made of a plastic sheet, but is not limited to this example.

The discharge device 18 arranged downstream of the mask kit 17 in the flow line ML discharges the second disinfectant liquid for disinfecting the fingers. The second disinfectant solution is an aqueous alcohol solution in this example, and thus the second disinfectant solution may be the same as or different from the first disinfectant solution. The discharge device 18 is provided with, for example, an infrared sensor 27 that detects a finger. When a finger is held over the infrared sensor 27, the ejection device 18 ejects a predetermined amount of the second disinfectant from the upper ejection portion 28 in the form of, for example, nanomist (fine droplets). As a result, the fingers are disinfected in a non-contact manner (discharge disinfection step), and this disinfection reduces the possibility that bacteria and viruses adhering to the fingers adhere to the objects of the indoor ID. Although the discharge device 18 is arranged in the indoor ID, it may be arranged in the outdoor OD in place of or in addition to the indoor ID. Although the discharge device 18 is operated by a rechargeable battery, it may be operated by a battery or may use electric power supplied from an external power source.

In the infection control system 11, the mask replacement is promoted after the temperature measurement and disinfection by the temperature measurement disinfection device 12 arranged on the flow line ML from the outdoor OD, and then the hand and finger are disinfected by the discharge device 18. The risk of infection is reduced even in indoor spaces where there are many opportunities for people to come into contact with each other.

In this example, the discharge device 18 is arranged in the vicinity of the mask kit 17, and is also arranged in the flow line ML, that is, further downstream in the movement direction of the person, as shown in FIG. The table 31 shown in FIG. 2 is installed downstream of the table 26 in the flow line ML, and for example, a person sits on a chair (not shown) to eat and drink. Since the discharge device 18 is arranged on the table 31, a person can disinfect his / her fingers when he / she is seated or when he / she leaves his / her seat and returns (discharge disinfection step). In this way, infection through the fingers is further suppressed. Since the mask 13 has already been passed to the person who entered the room, it is possible to have a dinner while wearing the mask 13.

A sterilizer 33A formed of a non-woven fabric, woven fabric, or paper impregnated with water in the vicinity of the discharge device 18 on the table 31 and sterilizes the sterilized object by wiping the sterilized object. , 33B are arranged, and these sterilizing tools 33A to 33B also constitute an infection control system 11. Alcohol may be impregnated in addition to water. The disinfectant 33A of this example is a bag containing Alicol tissue in which ethanol, purified water, and glycerin are impregnated in a non-woven fabric formed of polyester and rayon. Various items to bring such as terminals, microphones installed in karaoke rooms and the like, menus in restaurants, call buttons for calling store staff, and tables 31 can be sterilized. In addition, by placing the sterilizing tool 33A on a counter stand (not shown) that pays a fee at a store, it is possible to sterilize a pen or the like when signing. This prevents infection (contact infection) through such substances. The sterilizing tool 33B of this example is a non-woven fabric infiltrated with water, ethanol, and promanol, and can sterilize smartphones, tablet terminals, microphones, and the like. The disinfectant 33C is a hand towel made of a non-woven fabric holding antibacterial nanoparticles (ausiropolymer). As a result, it is adsorbed to the virus or the like of the sterilized object and inactivated. The sterilizing tools 33B and 33C can be used in the same manner as the sterilizing tools 33A, and have the same effect.

A spray device 35 that continuously ejects chlorine dioxide (stabilized chlorine dioxide) in the form of a mist is arranged in the indoor ID, and this spray device 35 also constitutes the infection prevention system 11. In the spraying device 35, a liquid obtained by diluting (20 times) a liquid agent concentration of 600 ppm to 30 ppm is stored in an internal container, and this liquid is continuously ejected by the ejection portion 35a. The bacteria may be sterilized at 300 ppm. As shown in FIG. 2, the ejection portion 35a may be provided on the side surface of the spraying device 35, or may be provided on the upper surface, for example. Since it is in the form of a mist, it spreads to the indoor ID while creating a space, so it has the effect of inactivating and sterilizing bacteria and viruses existing in the space, and it is possible to sterilize the space by suppressing airborne infection and droplet infection. Further, the spraying device 35 of this example is configured to detect and display the humidity, which facilitates the humidity control of the indoor ID. Depending on the displayed humidity, it is possible to take measures such as ventilating the indoor ID or operating a humidifier (not shown) to humidify. Humidification with a humidifier in this example is preferably performed so that the humidity is, for example, 40% RH (relative humidity) or more, and the humidity is ensured to be, for example, 40% RH to 60% RH, which is effective for droplet infection. Is desirable. Further, in this example, a carbon dioxide concentration detector (not shown) that detects and displays the concentration of carbon dioxide is also provided, and the necessity of ventilation can be determined according to the detected value by the detector. Thus, detection of carbon dioxide concentration motivates ventilation, and active ventilation leads to prevention of infection. The carbon dioxide concentration detector of this example is configured to display temperature (air temperature) and humidity as well.

Further, the infection prevention system 11 may further include a cleaning agent (not shown), a sprayer 41 for spraying chlorine dioxide, and an ultraviolet irradiation device 43, as shown in FIG. Examples of the cleaning agent include cleaning agents that are naturally derived and contain sodium fatty acid, and may be diluted with water before use. Infection (contact infection) is prevented by, for example, wiping various parts of the room (toilet, washbasin, chair such as sofa, table 31, kitchen, counter, etc.) with this cleaning agent. In addition, this cleaning agent does not require washing with water, which can shorten the time and the cleaning work. The cleaning agent, the sprayer 41, the ultraviolet irradiation device 43, and the above-mentioned sprayer 35 prevent contact infection as a hygiene management measure for the indoor ID.

In this example, the above-mentioned detergent containing sodium fatty acid has the same components and composition as the commercially available product (containing 0.3% sodium fatty acid) for which the following evidence has been given by Nara Medical University. Quality certification is obtained from the sales company of the commercial product. The evidence states that: In addition, in the following evidence description, "***" is described by substituting the name of the commercially available product in the present specification.

"3. Test microorganism: New coronavirus (SARS-CoV-2)"
The new coronavirus was infected with VeroE6 / TMPRSS2 cells, and those confirmed to have a cytopathic effect were recovered and cryopreserved in a freezer at -80 ° C. The product obtained by repeating freezing and thawing twice was centrifuged, and the supernatant was concentrated and purified with an ultrafiltration membrane. This was used as a test virus solution and stored frozen in a freezer at −80 ° C. until the test.
SARS-CoV-2 was obtained from the National Institute of Infectious Diseases, and VeroE6 / TMPRSS2 cells were obtained from the National Institutes of Biomedical Innovation, Health and Nutrition JCRB Cell Bank.
4. Test contents-180 μl of the test product was mixed with 20 μl of the virus solution and allowed to stand for 1 minute and 10 minutes, respectively.
-After the reaction, 1,800 μl of EDTA-containing SCDLP medium was mixed and the reaction was stopped.
-The virus infectivity titer (PFU / mL) was measured by the plaque method using the recovered solution.
The reaction temperature (room temperature) was 20 to 25 ° C.
・ It was carried out twice each.

The inactivating effect was calculated as follows.
Inactivating effect (Mv) = log (Ct / C ₀ ) -log (Nt / N ₀ )
= LogCt / Nt
Ct: Infectious titer after t hours of control
C ₀ : Infection value after 0 hours of control
Nt: Infectious titer after t hours of test product
N ₀ : The infection titer reduction rate after 0 hours of the test product was calculated from the logarithmic reduction value as follows.
Decrease rate = (1-1 / 10 ^{logarithm decrease value} ) x 100%
All tests were conducted at a biosafety level 3 (BSL3) experimental facility within the university under appropriate pathogen containment measures.
5. Results The results are shown in Tables 1 and 2 and FIG. The numerical value is the average value of two tests.
For the new coronavirus, the test product decreased from 8.50 × 10 ⁶ PFU / ml to <1.00 × 10 ² PFU / ml (decrease rate> 99.998%) in 1 minute, and the infectious titer decreased to the detection limit. did.

６．まとめ
本試験で使用した＊＊＊（脂肪酸ナトリウム０．３％含有）は新型コロナウイルス（ＳＡＲＳ－ＣｏＶ－２）に対して不活化効果を有することが判明した。本試験品を使用することにより、物質の表面についた新型コロナウイルスによる接触感染防止に有効である可能性が考えられた。なお、浮遊するウイルス、人体への影響については検証を行っていない。」

6. Summary It was found that *** (containing 0.3% sodium fatty acid) used in this test has an inactivating effect on the new coronavirus (SARS-CoV-2). It was considered that the use of this test product may be effective in preventing contact infection by the new coronavirus on the surface of the substance. The floating virus and its effect on the human body have not been verified. "

The atomizer 41 sprays chlorine dioxide (stabilized chlorine dioxide) in the form of mist. By spraying on a part where the hand of the indoor ID touches, for example, a wall or an installation object of the indoor ID (table 31 or the like), disinfection is performed instead of alcohol. It may be sprayed on the floor or the like. In addition, when cleaning work is not possible, disinfection can be performed instead of alcohol. When cleaning with a cleaning agent, the effect of preventing infection is improved by spraying after cleaning.

The ultraviolet irradiation device 43 emits ultraviolet rays (185 nm to 254 nm) to sterilize and disinfect the irradiated area irradiated with ultraviolet rays. As a result, infection (contact infection) is more reliably prevented. For example, in a store or the like, it is advisable to irradiate the walls and floors of the indoor ID and various installation objects with ultraviolet rays before and after the store is closed. The ultraviolet irradiation device 43 sterilizes by the action of both ultraviolet rays and generated ozone. The ultraviolet irradiation device 43 of this example emits UVC, has a small size of 170 mm in length and 35 mm in diameter, and automatically turns off in a predetermined time. Irradiation by the ultraviolet irradiation device 43 is effective because it can spray alcohol or chlorine dioxide or treat a portion that is difficult to clean.

According to the above configuration, cleaning with the above-mentioned cleaning agent containing sodium fatty acid and sterilization with chlorine dioxide (stabilized chlorine dioxide, in this example, Takafuji-type stabilized chlorine dioxide) of the spray device 35 and the sprayer 41. And, by the first disinfectant solution, the second disinfectant solution and the sterilization by the ultraviolet irradiation device 43, more reliable disinfection is performed and the risk of infection is further reduced. In addition, since disinfection measures such as sterilization and sterilization are performed on both humans and things, the risk of infection is surely reduced.

11 Infection prevention system 12 Temperature measurement and disinfection device 13 Mask 14 Mask case 18 Discharge device 21 Detection unit 22 Display unit 23 Discharge unit 27 Infrared sensor 28 Discharge unit 33A-33C Sterilizer 35 Spray device 43 UV irradiation device ID Indoor ML flow line OD Outdoor

Claims (6)

It has a detection unit that detects body temperature, a display unit that displays the body temperature detected by the detection unit, and a discharge unit that discharges a first disinfectant that disinfects fingers, and is arranged on a flow line from the outside. With temperature measurement and disinfection equipment,
A mask case for accommodating a mask and a used mask, which is arranged downstream from the temperature measuring and disinfecting device in the flow line, and
A discharge device that is arranged downstream of the mask and the mask case in the flow line and discharges a second disinfectant liquid that disinfects the fingers.
Infection control system with. The infection control system according to claim 1, wherein the temperature measurement disinfection device has a sensor for detecting the finger, and discharges the first disinfectant when the finger is detected by the sensor. The infection control system according to claim 1 or 2, further comprising an ultraviolet irradiation device that emits ultraviolet rays and disinfects the irradiation area irradiated with the ultraviolet rays. The infection control system according to any one of claims 1 to 3, further comprising a spraying device for continuously ejecting chlorine dioxide in the form of a mist. Further, a sterilizing tool arranged in the vicinity of the ejection device, formed of a non-woven fabric, woven fabric, or paper impregnated with water and sterilizing the sterilizing object by wiping the sterilizing object. The infection control system according to any one of claims 1 to 4. It has a detection unit that detects body temperature, a display unit that displays the body temperature detected by the detection unit, and a discharge unit that discharges a first disinfectant that disinfects fingers, and is arranged on a flow line from the outside. A temperature measurement and disinfection process that measures and disinfects body temperature with a temperature measurement and disinfection device,
A mask replacement process in which a used mask is housed in a mask case and a new mask is attached downstream of the temperature measuring and disinfecting device in the flow line.
An infection control method comprising a discharge disinfection step of disinfecting the fingers with a second disinfectant liquid discharged by a discharge device after the mask replacement step.

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