Filter and partition devices

Abstract

To provide a filter device that can suppress circulation of airborne droplets and particulates and is free from such the concern as deteriorating conversation performance between two people who are separated by a partition body, and to provide a partition device.SOLUTION: A filter device 10 includes: a ventilation filter 11 detachably fitted to a light permeable partition body 21 and having a bacterial filtration rate of 50% or more; and a fitting part 12 for fitting the ventilation filter 11 to the partition body 21.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a filter device and a partition device that collect droplets and fine particles. [Background technology]

[0002] Conventionally, many partition devices have been proposed that separate spaces using transparent sheets or the like without obstructing the view (see, for example, Patent Document 1). This type of partition device has a transparent partition body, so it is possible to prevent the partition device from obstructing the view within the space.

[0003] Transparent partition devices are also installed to separate two people facing each other at bank tellers, public transport counters, lottery ticket booths, prison visiting rooms, etc. In this type of device, voice holes, consisting of a plurality of small holes arranged in a roughly circular pattern, are provided in part of the partition body, allowing the separated people to talk to each other. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 3228429 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in a partition device with an air vent such as a voice hole, even if it is a small hole, as long as it functions as an air vent, it cannot prevent the passage of droplets, fine particles, bacteria, viruses, etc. between the two.

[0006] Recently, restaurants and other establishments have begun separating seats with transparent acrylic panels that have no ventilation holes, as a measure against the spread of viruses through droplets. While it is conceivable to provide ventilation holes in these types of partitions to make it easier for people to hear each other, as mentioned above, this raises concerns that the flow of droplets and fine particles between people may not be prevented.

[0007] The present invention has been proposed in consideration of these circumstances, and its purpose is to provide a filter device and a partition device that can suppress the circulation of droplets, fine particles, etc., and that does not pose a risk of reducing communication performance between the two parties separated by the partition body. [Means for solving the problem]

[0008] In order to achieve the above object, the filter device of the present invention comprises a ventilation filter with a bacterial filtration rate of 50% or more that is detachably attached to a light-transmitting partition body, and an attachment part for attaching the ventilation filter to the partition body. The ventilation filter has a layer structure in which a second filter material is sandwiched between a first filter material made of a mesh material made of a synthetic resin and a third filter material made of the same type of mesh material as the first filter material, and the fibers used in the second filter have a smaller fiber diameter than the fibers used in the first filter and the third filter. It is characterized by the following.

[0009] The partition device of the present invention is characterized by comprising a light-transmitting partition body and the above-mentioned filter device. [Effects of the Invention]

[0010] Because the filter device and partition device of the present invention have the above-described configuration, they can suppress the circulation of droplets, fine particles, etc., and also make it easier for people separated by the partition body to hear each other's voices. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is an exploded perspective view of a filter device according to an embodiment of the present invention. [Figure 2] 1 is an exploded perspective view of a partition device according to an embodiment of the present invention. [Figure 3]FIG. 10 is an exploded perspective view of a partition device according to another embodiment of the present invention. [Figure 4] An explanatory diagram of a partition body which is an example of an object to which a filter device according to another embodiment of the present invention is to be attached, where (a) is a front view and an enlarged partial front view of the partition body, and (b) is an enlarged cross-sectional view taken along the arrow AA of (a). [Figure 5] 1A is a front view and an enlarged partial front view of the partition body, and FIG. 1B is an enlarged cross-sectional view taken along line BB in FIG. 1A. [Figure 6] 10A and 10B are explanatory diagrams of two examples of a partition body of a partition device according to another embodiment of the present invention, in which (a) is a front view of the partition body according to one example, (b) is an enlarged cross-sectional view taken along the CC line in (a), (d) is a front view of the partition body according to another example, and (d) is an enlarged cross-sectional view taken along the DD line in (c). DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. First, the basic configuration of the filter device 10, 10A (see FIGS. 1 and 6) according to the embodiment will be described.

[0013] The filter device 10, 10A comprises a ventilation filter 11 with a bacterial filtration rate of 50% or more that can be removably attached to a light-transmitting partition body 21, and an attachment part 12 for attaching the ventilation filter 11 to the partition body 21.

[0014] 1, the ventilation filter 11 is configured by sandwiching a second filter material 11b between a first filter material 11a made of a mesh material made of synthetic resin and a third filter material 11c made of the same type of mesh material as the first filter material 11a. The mesh material is a flexible sheet-like material in which fibers are regularly arranged.

[0015] The ventilation filter 11 is used by attaching it to ventilation openings 22A, 22B of a partition body 21 that is installed on a table as a droplet prevention measure in restaurants, conference rooms, etc., a partition body 21 at a counter for face-to-face business in a bank or public transport facility, or a partition body 21 in a visiting room in a detention center or prison (see Figure 2). Note that ventilation openings 22A, 22B include those for making calls and those for the transfer of money or goods.

[0016] 1 to 5, the partition body 21 is made of a hard resin material such as a substantially rectangular transparent acrylic plate. The ventilation filter 11 is made of a transparent or translucent flexible sheet material made of synthetic resin. As will be described later, the partition body 21 also includes a vinyl curtain that can be easily attached by hanging at various face-to-face service counters.

[0017] The first filter material 11a and the third filter material 11c of the ventilation filter 11 are configured to be mesh materials that are thicker and stronger than the second filter material 11b. Nylon is used as the raw material for the first filter material 11a and the third filter material 11c, and nylon is also used as the raw material for the second filter material 11b.

[0018] A nanofiber thin film formed by electrospinning is preferably used as the second filter material 11b of the ventilation filter 11. According to this manufacturing method, the second filter material 11b can be formed by layering fibers having a smaller diameter than the fiber diameters used in the first filter material 11a and the third filter material 11c on the upper surface of the first filter material 11a as a base material.

[0019] The second filter material 11b formed by this manufacturing method has a thread diameter of 1000 nanometers or less. Therefore, it is breathable while blocking most bacteria and viruses. Furthermore, a third filter material 11c is superimposed on the second filter material 11b on the side opposite the first filter material 11a, and the exposed surface of the second filter material 11b is covered and protected by the third filter material 11c. The first filter material 11a and the third filter material 11c are joined by PET (polyethylene terephthalate) with their outer edges aligned. As mentioned above, the bacterial filtration rate of this breathable filter 11 is preferably 50% or higher.

[0020] According to the above-described manufacturing method, second filter material 11b having a thickness of 100 μm or less can be formed on first filter material 11a. In other words, by configuring ventilation filter 11 in which such extremely thin second filter material 11b is protected from both sides by first filter material 11a and third filter material 11c, the ventilation filter 11 becomes easier to handle and can be used as a filter device 10 for partition device 20.

[0021] Furthermore, when the ventilation filter 11 is attached to the partition body 21 for use, it is desirable that the total light transmittance be 10% or more and the haze value be 90% or less so as not to obstruct the view. The ventilation filter 11 is desirably made of a material that does not dissolve when wiped clean with alcohol for sterilization. Specifically, polypropylene is preferred as the material for the second filter material 11b of the ventilation filter 11. It is also desirable that the first filter material 11a and the third filter material 11c be made of the same type of insoluble material.

[0022] The ventilation filter 11 is a filter that is circular in plan view and made of the thin film sheet material described above. Mounting portion 12 is provided to stabilize the shape of this flexible ventilation filter 11 and to easily attach it to the partition body 21. In this way, the filter device 10 is configured to include the ventilation filter 11 and the mounting portion 12. The ventilation filter 11 is formed so that its area in plan view is larger than the opening area of ​​the ventilation holes 22A and 22B.

[0023] In this embodiment, the mounting portion 12 comprises a ring-shaped first frame portion 12a-1 and a second frame portion 12a-2 that sandwich the outer peripheral edge of the ventilation filter 11 from their opposing side surfaces, and a double-sided tape 12b attached to the side of the second frame portion 12a-2 opposite the first frame portion 12a-1 side. The first frame portion 12a-1 and the second frame portion 12a-2 are formed to the same diameter and are overlapped so that their centers coincide. The double-sided tape 12b is attached to the entire periphery of the side surface of the second frame portion 12a-2. It is desirable to use a self-adhesive polymer, such as an acrylic polymer, for the double-sided tape 12b.

[0024] The first frame 12a-1 and the second frame 12a-2 are intended to stabilize the shape of the flexible ventilation filter 11 and make it easier to handle. For this reason, it is desirable that the first frame 12a-1 and the second frame 12a-2 have higher rigidity than the ventilation filter 11, and it is desirable to use frames made of, for example, a transparent hard synthetic resin.

[0025] The two frame portions 12a-1 and 12a-2 are fixed to each other so that the ventilation filter 11 is sandwiched between them in a taut state. The fixing material for fixing the two frame portions 12a-1 and 12a-2 may be double-sided tape (not shown) or a hot melt adhesive (not shown). A hot melt adhesive containing vinyl acetate as a main component is preferable. The ventilation filter 11 may also be fixed to the two frame portions 12a-1 and 12a-2 by ultrasonic welding. However, fixing the ventilation filter 11 to the two frame portions 12a-1 and 12a-2 by hot melt adhesive is preferable from the standpoint of appearance because it does not leave welding marks or the like on the resin frame portions 12a-1 and 12a-2, compared to fixing by ultrasonic welding.

[0026] On the other hand, examples of the partition body 21 to which the filter device 10 shown in FIG. 1 is attached include those shown in FIGS.

[0027] Each of these partition bodies 21 is made of a substantially rectangular acrylic plate. In the example of Fig. 2, partition body 21 has a circular opening above the center as a vent 22A for calls. In addition, partition body 21 has a vent (voice hole) 22A made up of a group of small holes in a substantially circular shape above the center as shown in Fig. 3. The ventilation filters 11 (filter devices 10) are attached so as to cover these vents 22A.

[0028] In addition, a pair of left and right cut grooves 25 are provided on the lower part (bottom edge) of partition main body 21. Separate foot plates 26a are inserted into these cut grooves 25 to form legs 26. By placing these pair of legs 26 on a placement surface, partition main body 21 can be made to stand upright in a substantially vertical position, and can be used by placing it on a table in a restaurant or conference room.

[0029] The partition body 21 in Figure 2 also has a notched, horizontally elongated opening (vent) 22B formed in the center of the bottom edge. This horizontally elongated opening 22B is used for the exchange of money or goods during face-to-face business. This vent 22B can also be used to attach another filter device 10A (see Figure 6) that matches the shape of this opening. The other filter device 10A will be described later in the explanation of Figure 6.

[0030] The partition device 20 described above allows ventilation between the two spaces separated by the partition body 21, while the ventilation filter 11 prevents the flow of fine particles, droplets, bacteria, viruses, pollen, PM2.5, etc. between the two spaces.

[0031] The circular ventilation hole 22A that the partition body 21 already has may be the speech hole 22A shown in Fig. 2 or a voice vent 22A. For example, a partition body 21 having a circular opening as the ventilation hole 22A may be manufactured, and a filter device 10 may be attached to the opening to form a new partition device 20. Alternatively, an existing partition body 21 having a voice vent 22A may be modified to a new partition device 20 by attaching a filter device 10 to the voice vent 22A so as to cover the voice vent 22A. Furthermore, the portion of the existing partition body 21 where the voice vent 22A would be located may be hollowed out to form a circular opening, and a filter device 10 may be attached thereto.

[0032] The filter device 10 described above includes the double-sided tape 12b as the mounting portion 12, so that the filter device 10 can be easily attached to the ventilation opening 22A of the partition body 21.

[0033] Furthermore, the filter device 10 may be fitted into the circular vent 22A rather than being attached to the surface of the partition body 21 using the double-sided tape 12b. In this case, the double-sided tape 12b is not required as the mounting part 12, and the frame parts 12a-1 and 12a-2 can be used as the mounting part 12 to be fitted into the vent 22A.

[0034] 2 and 3 is an acrylic plate, but it may be made of a soft material such as a vinyl curtain. In that case, the partition device 20 can be formed by opening a vent hole 22A in the vinyl curtain and attaching the filter device 10 to the vent hole 22A.

[0035] Also, a portion of the vinyl curtain may be replaced with a ventilation filter 11. For example, the ventilation filter 11 (filter device 10) may be disposed in the middle of two vinyl curtain materials. For example, if they are arranged side by side, attachment portions 12 made of double-sided tape 12b may be provided on the left and right sides of the ventilation filter 11 so that it can be connected to the adjacent vinyl curtain. Note that the frame portions 12a-1 and 12a-2 that stabilize the shape of the ventilation filter 11 do not need to be used.

[0036] The above describes an example in which frame portions 12a-1, 12a-2 and double-sided tape 12b are attached to the edge of ventilation filter 11 as mounting portion 12, but frame portions 12a-1, 12a-2 may be fixed to partition body 21 without using double-sided tape 12b, or mounting portion 12 made up of the edge of ventilation filter 11 may be fixed directly to partition body 21 without using frame portions 12a-1, 12a-2. Fixing methods in this case include ultrasonic welding and hot melt adhesion.

[0037] Furthermore, the filter device 10, which has the mounting portion 12 having the frame portions 12a-1 and 12a-2 on the ventilation filter 11, may be fixed to the partition body 21 by a structural fixing method without using adhesive or double-sided tape 12b. For example, as shown in Figures 4 and 5, mounting receiving portions 23A and 23B that receive and support the mounting portion 12 of the filter device 10 may be added to the partition body 21.

[0038] Specifically, the partition body 21 in FIG. 4 has a circular vent 22A, and a step 23Aa is formed on the inner peripheral end surface of the vent 22A. The filter device 10 is configured to fit or fit loosely into the step 23Aa. Three register marks 23Ab are provided at equal intervals along the circumference on the outer periphery of the step 23Aa of the partition body 21. These register marks 23Ab are configured to sandwich and fix the frame portions 12a-1 and 12a-2 of the filter device 10 between the partition body 21 (step portions 23Aa) and the register marks 23Ab. The register marks 23Ab are attached to the partition body 21 so as to be rotatable around an attachment shaft 23Ac.

[0039] In other words, in the example of FIG. 4, the step portion 23Aa and the registration mark 23Ab are added to the partition body 21, thereby forming the attachment receiving portion 23 for attaching the filter device 10.

[0040] 5 has a circular vent 22A. A half-ring-shaped receiving groove member 23Ba is fixed to the partition body 21 on the substantially semicircular arc-shaped peripheral edge of the lower half of one side of the vent 22A so as to form a space (groove) between the partition body 21 and the vent 22A. This space serves as receiving groove 23Bb into which the frame portions 12a-1 and 12a-2 of the filter device 10 can be fitted or loosely fitted.

[0041] In short, in the example of Figure 5, by adding a receiving groove member 23Ba to the partition body 21, a receiving groove 23Bb for receiving the filter device 10 is formed, and thus an attachment receiving portion 23B for attaching the filter device 10 is formed.

[0042] As in the above two examples, mounting receiving portions 23A and 23B are added to the partition main body 21, so the filter device 10 can be removably attached to the partition main body 21 without being fixed to it with double-sided tape 12b or adhesive.

[0043] Furthermore, when the filter device 10 is attached, it is desirable that the frame portions 12a-1, 12a-2 (mounting portion 12) are fitted into the mounting receiving portion 23B so that no gaps are created in the mounting portions of the frame portions 12a-1, 12a-2 through which droplets or fine particles can flow.

[0044] Furthermore, in order to minimize gaps in the above two examples, it is desirable to make the frame portions 12a-1 and 12a-2 cushioned (for example, rubber) or to attach a cushioning material to the surfaces of the frame portions 12a-1 and 12a-2, thereby maintaining a tight fit between the partition body 21 and the frame portions 12a-1 and 12a-2. In particular, in the example of Fig. 5, it is desirable to tightly fit the partition body 21 and the frame portions 12a-1 and 12a-2 so that no gaps are formed in the upper half of the ventilation opening 22A.

[0045] Next, the manner in which the filter device 10A is attached to and detached from the horizontally elongated opening 22B of the partition body 21 shown in Figure 2 will be explained with reference to Figures 6(a) and (b) which are a first example and Figures 6(c) and (d) which are a second example.

[0046] In the first example, a horizontally elongated filter device 10A is attached to a partition body 21 by sliding it laterally. The filter device 10A has a ventilation filter 11 and a frame portion (not shown in this figure) serving as an attachment portion 12 provided on its edge portion (four sides). Above the horizontally elongated opening 22B of the partition body 21, there is provided an attachment receiving portion 23C consisting of a slide groove portion 23Ca having a receiving groove 23Cb that opens downward. Both ends of the receiving groove 23Cb are open as insertion ports.

[0047] When using this partition device 20 for face-to-face business, the filter device 10 is slid in the direction of the outlined arrow in FIG. 6(a) to open or close the horizontally elongated opening 22B.

[0048] In the second example, a horizontally elongated filter device 10 is attached to the partition body 21 by sliding it vertically. The filter device 10 has a ventilation filter 11 and a frame portion (not shown in this figure) attached to its edge portion (four sides). On the left and right outer sides of the horizontally elongated opening 22B of the partition body 21, there are provided attachment receiving portions 23C consisting of slide groove portions 23Ca having receiving grooves 23Cb opening to face each other. At least the upper ends of the receiving grooves 23Cb are open as insertion openings.

[0049] The partition device 20 in Figures 6(c) and (d) has a groove 25 (leg 26), and although the leg 26 prevents the filter device 10 from sliding sideways, it is equipped with an attachment receiving portion 23C that allows the filter device 10 to be attached by sliding it up and down, making it easy to open and close.

[0050] In this way, even if partition body 21 has ventilation opening 22B for the transfer of money or goods, filter device 10A can easily open and close ventilation opening 22B. Therefore, by frequently opening and closing ventilation opening 22B, it is possible to prevent ventilation opening 22B from remaining open for a long time, thereby reducing the flow of droplets and fine particles between both sides of partition body 21.

[0051] Furthermore, the material used for the first filter material 11a and the third filter material 11c of the ventilation filter 11 is not limited to a mesh material, and may be a nonwoven fabric having a structure in which thread-like substances made of resin are irregularly entangled. Furthermore, the first filter material 11a and the third filter material 11c do not have to be made of the same material; one may be made of a mesh material and the other of a nonwoven fabric.

[0052] Furthermore, the material used for the second filter material 11b of the ventilation filter 11 is not limited to nanofibers and may be other materials, such as mesh materials or nonwoven fabrics. The second filter material 11b may be made of multiple thin film sheets stacked together to achieve a bacterial filtration rate of 50% or more. Because the ventilation filter 11 is attached to the light-transmitting partition body 21, it is desirable that the ventilation filter 11 attached to that surface also be light-transmitting so as not to obstruct the field of view, but this is not a limitation. For example, an opaque nonwoven fabric such as that used in sanitary masks may be used as the ventilation filter 11. The ventilation filter 11 may be designed to have a bacterial filtration rate of more than 50%, for example, a bacterial filtration rate of 99% or more.

[0053] In this embodiment, the ventilation filter 11 has a three-layer structure in which the first filter material 11a and the third filter material 11c are arranged on both sides of the second filter material 11b, but the ventilation filter 11 may be composed of one or more layers of the second filter material 11b without using the first filter material 11a or the third filter material 11c.

[0054] The second filter material 11b is mainly made of synthetic polymer materials, such as PA (polyamide: PA6, PA66, PA46, etc.), PS (polystyrene), PC (polycarbonate), PMMA (polymethyl methacrylate), PU (polyurethane), PVC (polyvinyl chloride), PVB (polyvinyl butyral), PVDF (polyvinylidene fluoride), PVA (polyvinyl alcohol), PVP (polyvinylpyrrolidone), PET (polyethylene terephthalate), PEO (polyethylene oxide), PLA (polylactic acid), PGA (polyglycolic acid), PCL (polycaprolactone), PEG (polyethylene glycol), etc. Possible materials include at least one of the following: cellulose acetate (PEVA), PLGA (polylactic acid-co-glycolic acid copolymer), PEVA (vinyl acetate-ethylene copolymer), PEVOH, PBI (polybenzimidazole), PAN (polyacrylonitrile), PEN (polyethylene naphthalate), PBT (polybutylene terephthalate), PE (polyethylene), PP (polypropylene), PB (polybutylene), PI (polyimide), collagen, chitosan, silk, cellulose, and cellulose acetate. Therefore, the second filter material 11b may be a combination of multiple materials.

[0055] In the above, an acrylic plate or a vinyl curtain has been described as an example of the partition body 21, but the entire body may be mesh-like, in which case the filter devices 10, 10A may be attached so as to overlap the entire partition body 21. In this case, the attachment portion 12 made of double-sided tape 12b may be provided on the edge of the ventilation filter 11.

[0056] The filter devices 10, 10A and the partition device 20 according to the embodiment described above are merely examples, and it goes without saying that they can be appropriately modified to various examples other than those shown in the drawings.

[0057] For example, the mounting portion 12 is not limited to being made of synthetic resin, and may be made of wood or metal. The partition device 20 may be installed on the floor. The partition body 21 may be fixed to a frame without providing the legs 26, and may be used as a partition board for face-to-face business counters in banks, public transportation facilities (ticket issuing services), government offices, etc.

[0058] Furthermore, the above-described filter devices 10, 10A and partition device 20 can also be used for various face-to-face operations other than those described above, such as cashier operations at supermarkets and in-cab operations. [Explanation of symbols]

[0059] 10, 10A filter device 11 Ventilation filter 11a First filter material 11b Second filter material 11c Third filter material 12 Mounting part 12a-1 1st frame part (frame part) 12a-2 Second frame part (frame part) 12b double-sided tape 20 Partition device 21 Partition body 22A Ventilation hole (communication hole, voice hole) 22B Ventilation hole (horizontal opening) 23A Mounting part 23Aa Step 23Ab Dragonfly 23B Mounting part 23Ba Receiving groove material 23Bb receiving groove 23C Mounting part 23Ca slide groove 23Cb receiving groove 25 kerf 26 Legs 26a Footboard

Claims

1. a ventilation filter with a bacterial filtration rate of 50% or more that can be detachably attached to the light-transmitting partition body; an attachment portion for attaching the ventilation filter to the partition body; Equipped with The ventilation filter has a layered structure in which a second filter material is sandwiched between a first filter material made of a mesh material made of a synthetic resin and a third filter material made of the same type of mesh material as the first filter material, A filter device characterized in that the fibers used in the second filter have a smaller fiber diameter than the fibers used in the first filter and the third filter.

2. In claim 1, A filter device characterized in that the mounting portion is provided on the edge of the ventilation filter, has higher rigidity than the ventilation filter, and has a side frame portion of the ventilation filter to stabilize the shape of the ventilation filter.

3. In claim 1 or 2, The filter device is characterized in that the ventilation filter has a total light transmittance of 10% or more and a haze value of 90% or less.

4. In any one of claims 1 to 3, The filter device is characterized in that the ventilation filter is made of a material that is insoluble in alcohols.

5. In any one of claims 1 to 4, A filter device characterized in that the mounting portion is equipped with double-sided tape for attaching to the partition body.

6. In any one of claims 1 to 5, A filter device, wherein the first filter and the third filter are made of a mesh material stronger than that of the second filter.

7. A light-transmitting partition body, A partition device comprising the filter device according to any one of claims 1 to 6.

8. In claim 7, A partition device characterized by comprising an attachment receiving portion that receives the attachment portion and allows the filter device to be attached and detached.

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