JP2019099973A - Dustproof mask - Google Patents

Abstract

To provide a dustproof mask for enhancing fitting feeling and cost performance as well as reducing a degree of leakage (leak-rate) of ambient air, by enhancing fitting property with respect to a face surface.SOLUTION: A dustproof mask comprises: a mask body 10 formed by swelling into a cup shape except for a peripheral edge part; and a face seal part 20 in which a peripheral edge of its outer peripheral edge part is fixed to a part of a peripheral edge of the peripheral edge part of the mask body 10 and its inner peripheral edge part projects inward. and is characterized in that the dustproof mask has: a pair of first projection parts 11a, 11b projecting respectively radially from an end part of a side surface upper part side of the peripheral edge part of the mask body 10; a pair of second projection parts 12a, 12b projecting respectively radially from an end part of a side surface lower part side of the peripheral edge part of the mask body 10; and ruled line parts 13a-13d consisting of recessed grooves recessed from a surface of the face seal part 20 side of the pair of second projection parts 12a, 12b at borders between the peripheral edge part of the mask body 10 and the pair of second projection parts 12a,12b.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a dustproof mask.

  As for the dustproof mask, the standard of the dustproof mask is set based on the provisions of Article 42 of the Occupational Safety and Health Act (Law 57 of 1972). According to this standard, there are two types of dust masks: replaceable dust masks and disposable dust masks. Among these, the disposable dust respirator (mask) has an integrated filter material and face, and a lace. When the wearer wears a mask, dust is filtered by the filter material, and the wearer can inhale clean air. Also, exhaled breath can be discharged into the open air.

  When the wearer wears a mask, the gap between the face and the mask is eliminated to improve adhesion to the face, thereby reducing leakage of external air and also feeling of wearing (also referred to as "fitness"). It is desirable that the cost be excellent. In general, the mask improves the adhesion to the face by adjusting the tension of the strap to reduce the degree of leakage of the outside air (leak rate) when worn. However, this method has a problem in that the pressure applied to the contact surface of the face and the mask is increased, and the wearer feels discomfort such as pain and itching.

  Therefore, in Patent Document 1, a filter portion formed in a substantially hemispherical shape so as to cover the nose portion and the mouth portion, an opening is formed in a portion extending from the entire outer edge of the filter portion to the center and located in the nose portion and the mouth portion. There has been proposed a mask consisting of a face-faced cushion. Since this mask has a three-dimensional shaped face-to-face cushion along the relief of the face, it improves fit by eliminating pressure bias on the contact surface between the face and the mask and enhancing the adhesion to the face. To improve.

  However, in the mask described in Patent Document 1, it is necessary to provide a plurality of undulations in the filter portion in accordance with the three-dimensional face-contact cushion along the undulations of the face. As a result, complicated processes for welding the filter portion and the face-to-face cushion are required, which requires high-level manufacturing equipment, resulting in high cost.

  In addition, Patent Document 2 proposes a disposable dustproof mask which has a flexible portion in the main body, not in a three-dimensional shape, and brings the main body and the face into close contact with each other. The mask described in Patent Document 2 improves the adhesion to the face and the wearing feeling by providing an expandable bent portion all around the lower peripheral edge of the shape-retaining filter in the mask face body.

  However, the mask described in Patent Document 2 uses a non-woven fabric made of a synthetic resin fiber having a predetermined hardness as a folded portion of the shape retention filter. For this reason, the shape-retaining filter can not have the flexibility to be in intimate contact with the complex relief of the face, and a problem remains in the adhesion of the mask.

Patent No. 4845861 Patent No. 5313220

  The present invention has been proposed in view of the above situation, and by improving the adhesion to the face, the degree of leakage of the outside air (leakage rate) is reduced, and a dustproof mask excellent in fit and cost characteristics Intended to provide.

  In the first aspect of the dustproof mask according to the present invention, the peripheral edge of the outer peripheral edge portion is fixed to a part of the peripheral edge of the mask main body formed by swelling in a cup shape excluding the peripheral edge portion A dustproof mask comprising a face seal portion having an inner peripheral edge projecting inward, and radially projecting outward from the upper end of the side surface upper side of the peripheral edge portion of the mask body One set of first protrusions, one set of second protrusions projecting radially outward from the lower end of the side edge of the peripheral edge of the mask body, the peripheral edge of the mask body, and A dustproof mask characterized by having a ruled line portion comprising a concave groove recessed from a face on the face seal portion side of the one set of second protrusions at the boundary with the second protrusion of the set. is there.

  According to a second aspect of the dustproof mask of the present invention, the mask body, the set of first protrusions, and the set of second protrusions are integrally formed of a sheet material. The dustproof mask according to the first aspect is characterized in that

  In the third aspect of the dustproof mask according to the present invention, in the face seal portion, the periphery of the outer peripheral edge is fixed to the entire periphery of the peripheral edge of the mask main body, and the inner peripheral edge protrudes inward The dustproof mask according to the first or second aspect is characterized in that the opening is formed to surround an area corresponding to the nose and the mouth.

  In a fourth aspect of the dustproof mask according to the present invention, the face seal portion is a set of third set radially outward from the periphery of the outer peripheral edge portion corresponding to the set of first protrusions. And a pair of fourth protrusions projecting radially outward from the peripheral edge of the outer peripheral edge corresponding to the set of second protrusions, wherein the set of third protrusions is provided. The periphery of the periphery of the portion is fixed to the periphery of the periphery of the set of first protrusions, and the periphery of the edge of the set of fourth protrusions is the periphery of the set of second protrusions The dustproof mask according to any one of the first to third aspects is characterized in that it is fixed to the periphery of the part.

  In a fifth aspect of the dustproof mask according to the present invention, the face seal portion, the one set of third projecting portions, and the one set of fourth projecting portions are integrally molded from a sheet material made of a foamed elastic body. It is in the dustproof mask of the 4th mode characterized by being.

  In a sixth aspect of the dustproof mask according to the present invention, the ruled line portions are formed of two concave grooves which are separated from each other and are recessed from the face seal portion side of the pair of second protrusions. The dustproof mask according to any one of the first to fifth aspects is characterized in that

  A seventh aspect of the dustproof mask according to the present invention comprises a pair of straps each having two fixed ends, one of the pair of straps being attached to the pair of first protrusions. The dustproof system according to any one of the first to sixth aspects, characterized in that two fixed ends are respectively fixed, and the other is fixed to the one set of second projections respectively by two fixed ends. It is in the mask.

  ADVANTAGE OF THE INVENTION According to this invention, while improving the degree (leakage rate) of the leak of external air by improving the adhesiveness to a face, the dustproof mask excellent in a feeling of fitting and cost property can be provided.

It is a front view of a dustproof mask. It is a schematic side view of a dustproof mask. It is a back view of a dustproof mask. (A) is an AA 'line sectional view of the 1st projection of Drawing 1, and (b) is a BB' line sectional view of the 2nd projection. (A) is the perspective view which showed the state before bending one set of 2nd protrusion part of a dustproof mask, (b) is the perspective view which showed the state which was bend | folded. It is the figure which showed the state which bend | folded the 2nd protrusion part of the BB 'sectional view taken on the line of FIG.4 (b). (A) is an enlarged photograph of the 1st projection of a photograph at the time of wear of a dustproof mask, (b) is an enlarged photograph of the 2nd projection. It is a figure showing each manufacturing process of a dustproof mask. (A) is a back view of an ultrasonic horn mold, (b) is a front view of the dustproof mask before fixation of a lacing. It is a front view of the dustproof mask of other embodiment. It is a front view of the dustproof mask of other embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the following description shows one aspect of the present invention, and can be arbitrarily changed within the scope of the present invention. The same reference numerals in the drawings indicate the same members, and the description thereof is appropriately omitted. The components shown in the drawings, that is, the shapes, sizes, thicknesses, relative positional relationships, and the like of the respective parts may be exaggerated when describing the present invention.

(Dustproof mask)
FIG. 1 is a front view of the dustproof mask, FIG. 2 is a schematic side view of the dustproof mask, and FIG. 3 is a back view of the dustproof mask. In FIG. 4, (a) is a cross-sectional view taken along line A-A ′ of one first protrusion in FIG. 1, and (b) is a cross-sectional view taken along line B-B ′ of one second protrusion.

  As illustrated, the dustproof mask 1 according to the embodiment of the present invention is provided at different positions of the mask body 10, the face seal 20 fixed to the face contact surface side of the mask body 10, and the peripheral portion of the mask body 10. And a set of straps 30 secured to each other. The dustproof mask 1 is of the overhead type (head-mounted type).

  The mask main body 10 is formed by bulging (projecting) in a cup shape (whip shape) except for the peripheral portion so as to cover the mouth and nose of the wearer's face. The shape of the mask body 10 is not particularly limited as long as it can secure a space to the extent that it does not hinder the wearer's intake of intake and discharge of exhalation. If the internal volume of the mask body 10 is too large, ventilation of the space of the mask body 10 will be poor, and the carbon dioxide concentration will rise, and the wearer will feel awkwardness, so it has an appropriate size Is preferred. Such a mask main body 10 has, for example, a hemispherical shape, a semi-elliptic spherical shape, a shape such as a trapezoidal shape on the side surface, and a shape obtained by appropriately deforming them, etc. It may be any shape that can be covered.

  In addition, the mask body 10 has a pair of first protrusions 11a and 11b that project radially outward from the upper end of the side edge of the peripheral edge, and the end of the lower side edge of the peripheral edge. A pair of second protrusions 12a and 12b are provided so as to protrude radially outward respectively. In the present embodiment, the mask body 10, the pair of first protrusions 11a and 11b, and the pair of second protrusions 12a and 12b are integrally formed of a sheet material described later. Further, the end on the side upper side of the peripheral portion of the mask main body 10 is the end on which the peripheral portion of the mask main body 10 corresponds to the cheekbone of the face, and the end on the side lower side of the peripheral portion of the mask main 10 Is an end corresponding to the lower cheek of the peripheral portion of the face of the mask 10. Further, both ends (two fixed ends) of one set of straps 30 are fixed to the non-face-contacting surfaces of one set of the first protrusions 11a and 11b and one set of the second protrusions 12a and 12b. ing. The pair of first protrusions 11a and 11b and the pair of second protrusions 12a and 12b are for attaching a pair of straps 30, respectively.

  One set of the first protrusions 11a and 11b is integrally extended with the peripheral portion of the mask main body 10 and extended outward, and there is no crease or the like at the boundary with the peripheral portion, and it is outward It protrudes. Further, when the dustproof mask 1 is worn, the positions of the apexes of the pair of first protrusions 11a and 11b are arranged closer to the ear than the position of the apexes of the cheekbones of the wearer's face. As a result, the pair of first protrusions 11a and 11b can wrap around the cheekbones while preventing the skin from directly hitting the thin cheekbones. That is, the dustproof mask 1 forms a cheekbone holding structure that wraps the cheekbone with the entire first projection 11a, 11b when worn. With this cheekbone holding structure, the face seal portion 20 in a region in contact with the nose and cheekbones at the time of wearing is partially elastically deformed to apply an appropriate pressure, and the dustproof mask 1 can be closely attached to the face.

  One set of the second protrusions 12a and 12b is integrally extended with the peripheral portion of the mask body 10 and extends outward, and a crease (a ruled line portion 13a to be described later) is formed at the boundary with the peripheral portion. 13 d) are provided and project outwards. Further, when the dustproof mask 1 is worn, the positions of the apexes of the pair of second protrusions 12a and 12b are disposed below the lower ear (lower cheek) of the wearer's ear. When an external force (in the present embodiment, the tension of the strap 30) is applied to one pair of second protrusions 12a and 12b, the second protrusions 12a and 12b are bent by the ruled line portions 13a to 13d provided at the boundary with the peripheral portion of the mask main body 10. That is, the dustproof mask 1 forms a bent structure in which the ruled line portions 13a to 13d provided at the boundary between the mask body 10 and the pair of second protrusions 12a and 12b are naturally bent by an external force. With such a bending structure, the pair of second protrusions 12a and 12b bends when worn, and the dustproof mask 1 is brought into close contact with the face without elastically deforming the face seal portion 20 in the area in contact with the cheeks and jaws. it can. In particular, the skin of the cheek is soft, and if the face seal 20 which is in contact with the cheek region is elastically deformed, a gap is formed between the face and the face, so at least the area contacting the cheek, especially the cheek and chin It is preferable that the face seal portion 20 in a region in contact with the portion is not elastically deformed. In the present embodiment, since the dustproof mask 1 has a bent structure, an appropriate pressure can be applied to the face and the dustproof mask 1 can be adhered.

  In a front view of the dustproof mask 1, the shape of the pair of first protrusions 11a and 11b and the pair of second protrusions 12a and 12b is a triangular pyramid (peak shape) with the corners of the apex dropped, It is not limited to this shape as long as a space for securing each end of one set of straps 30 is secured and the wearer of the dustproof mask 1 is not given discomfort such as pain and itching. For example, it may be rectangular, circular, semicircular, etc., or may be a combination of these shapes. For example, a keyhole having a rectangular longitudinal end has a circular shape. It is also good.

  Ruled line portions 13a to 13d are provided at boundaries between the peripheral portion of the mask body 10 and the pair of second protrusions 12a and 12b. Two ruled line portions 13a and 13b are provided separately from each other on the second protrusion 12a side, and two ruled line portions 13c and 13d are provided separately from each other on the second protrusion 12b side. There is. Here, the ruled line portions 13 a to 13 d are straight folds provided such that the pair of second protrusions 12 a and 12 b is bent by the tension of the lace 30 when the dustproof mask 1 is worn. Although details will be described later, the ruled line portions 13a to 13d are simultaneously formed when the mask main body 10 and the face seal portion 20 are ultrasonically welded by pressing a mold from the face contact surface side of the face seal portion 20. Ru. The ruled line portions 13 a to 13 d are folds protruding in the expansion direction of the mask body 10.

  The ruled line portions 13a to 13d may be installed on the peripheral edge portion which is not the bulging portion of the mask main body 10. For example, the installation position may be set according to the size of the face of the wearer. The shape of the ruled line portions 13a to 13d is not limited to a linear shape as long as it functions as a fold of the pair of second protrusions 12a and 12b, and may be, for example, a dotted line or a chain line.

  Furthermore, the number of the ruled line portions 13a to 13d is not limited to the configuration provided with two each in one set of second protrusions 12a and 12b, as long as it functions as a fold of one set of second protrusions 12a and 12b. For example, one or three or more may be provided. In the present embodiment, in order to easily bend the pair of second protrusions 12a and 12b, two pairs of the second protrusions 12a and 12b are provided.

  Although details will be described later, the protrusions 21c and 21d of the face seal portion 20 are respectively fixed to the face contact surface side of the pair of second protrusions 12a and 12b, and the pair of second protrusions 12a, 12b has a predetermined thickness. By having such a thickness, for example, when bending it at a single angle of 90 ° with respect to the horizontal plane of the dustproof mask 1, it is possible to bend it at one time, and one set of the second protrusions 12a and 12b (outside) Misalignment occurs in the folding position on the side of the projecting portions 21c and 21d (inside), and they mutually buffer and become difficult to bend. Therefore, in the present embodiment, two ruled line portions 13a and 13b are provided in the second protrusion 12a, and two ruled line portions 13c and 13d are provided in the second protrusion 12b. Thereby, when bending 90 degrees with respect to the horizontal surface of the dustproof mask 1, for example, the second protrusion 12a may be bent 45 degrees with respect to the horizontal surface of the dustproof mask 1 with the ruled line 13a and further 45 degrees with the ruled line 13c. Yes (see Figure 6). Although not shown, the second protrusion 12b can be bent in the same manner as the second protrusion 12a. As described above, when the dustproof mask 1 is bent at a predetermined angle with respect to the horizontal plane, the width of the folding position on the side of the projecting portions 21c and 21d which becomes a valley portion when divided into two halves of a predetermined angle. Can be reduced, and buffering between the protrusions 21c and 21d and the pair of second protrusions 12a and 12b can be avoided.

  The material of the mask main body 10 is not particularly limited as long as it can be taken in and discharged from the wearer and can function as a filter unit that enables filtering of the breath and the inspiratory flow. For example, it is composed of a shape-retaining sheet material 100 (see FIG. 8A) for retaining the shape of the mask body 10 and a filter material 110 (see FIG. 8B) for providing the mask body 10 with a filter function. As a sheet material having good breathability can be applied. Examples of such a sheet material include, in addition to fibrous nonwoven fabrics containing thermoplastic synthetic fibers (heat fusible fibers), woven fabrics, apertured plastic films, laminate sheets thereof, etc., gauze, cotton cloth, etc. be able to. In particular, a breathable fibrous nonwoven fabric sheet containing heat fusible fibers, such as meltblown (MB) fibrous nonwoven fabric, spunbond (SB) fibrous nonwoven fabric, laminated (SMS) fibrous nonwoven fabric, air through (thermal bond) fibrous nonwoven fabric, etc. It is preferable to use what was formed from the sheet material which consists of various well-known fiber nonwoven fabrics of this. The sheet material may contain fine particles having a deodorizing effect such as activated carbon, and an intermediate sheet containing an antibacterial agent, a fragrance and the like may be interposed between the sheet materials.

  The face seal portion 20 is disposed on the face contact surface side of the mask body 10 and is in close contact with the face when the dustproof mask 1 is worn, and can be elastically deformed according to the unevenness of at least the nose and cheekbones. And have adequate flexibility. The shape of the face seal portion 20 may be appropriately changed in accordance with the shape of the bottom surface (face contact surface) of the mask main body 10. In the present embodiment, since the mask main body 10 is provided with the pair of first protrusions 11a and 11b and the pair of second protrusions 12a and 12b, the peripheral portion of the face seal portion 20 is formed according to its shape. Protrusions 21 a to 21 d are provided so as to project radially outward from the respective end portions on the side surface upper side and the side surface lower side. In the present embodiment, the face seal portion 20 and the protruding portions 21a to 21d are integrally formed of a sheet material described later. The protrusions 21a and 21b correspond to a pair of first protrusions 11a and 11b, and the protrusions 21c and 21d correspond to a pair of second protrusions 12a and 12b.

  Further, the face seal portion 20 has an opening 22 formed so that the inner peripheral edge portion protrudes inward and the region corresponding to the nose portion and the mouth portion is surrounded. As a result, the nose and the mouth of the wearer can be inserted through the opening 22 to bring the mask body 10 into close contact with the face, thereby preventing dust from invading from the outside. In the present embodiment, the face seal portion 20 is configured to be in contact with the part corresponding to the nose and the mouth of the wearer except for the opening 22. However, dust does not enter the wearer and dust is invaded from the outside. If it can prevent, it will not be limited to the composition. For example, the peripheral edge of the outer peripheral edge of the face seal portion 20 may be fixed to a part of the peripheral edge of the mask main body 10, and the inner peripheral edge may protrude inward. Such a configuration is such that a gap between the mask body 10 and the face is easily formed and dust infiltration from the outside is large, for example, the face seal portion 20 is in contact with at least a portion corresponding to the nose of the wearer. . In this case, a portion corresponding to the nose portion of the mask body 10 may be reinforced using a reinforcing tool such as a nose wire (nose pad), as necessary.

  In the present embodiment, the peripheral edge of the outer peripheral edge of the face seal portion 20 is fixed to the entire periphery of the peripheral edge of the mask main body 10 while extending integrally with the peripheral edge of the mask main body 10 The peripheral edge of the outer peripheral edge portion of the face seal portion 20 is not fixed to the region corresponding to the pair of first protrusions 11a and 11b and the pair of second protrusions 12a and 12b. This is because the peripheries of the pair of first protrusions 11a and 11b and the pair of second protrusions 12a and 12b and the periphery of the outer periphery of the protrusions 21a to 21d are fixed. Further, at the boundary between the peripheral portion of the face seal portion 20 and the protrusions 21a to 21d, two concave grooves are provided. These concave grooves are creased portions 13a to 13d that are recessed when the mask main body 10 and the face seal portion 20 are ultrasonically welded by pressing a mold from the face contact surface side of the face seal portion 20. .

  Here, the method of fixing the mask body 10 to the face seal portion 20 and the method of fixing the pair of first protrusions 11a and 11b and the pair of second protrusions 12a and 12b to the protrusions 21a to 21d are as follows. Generally, welding, sewing, adhesive, etc. by heat, ultrasonic waves, etc. are applied, but in the present embodiment, both are fixed by ultrasonic welding. By applying ultrasonic welding, adhesion between the mask main body 10 and the face seal portion 20, and one set of first protrusions 11a and 11b, one set of second protrusions 12a and 12b, and protrusions 21a to 21d In addition to these fixations, the formation of the ruled line portions 13a to 13d can be performed in one step. As a result, the number of steps in the manufacturing process can be reduced without using advanced manufacturing equipment, and significant cost reduction can be realized.

  When the mask main body 10 and the face seal portion 20 are fixed by ultrasonic welding, and one set of first protrusions 11a and 11b and one set of second protrusions 12a and 12b are fixed to the protrusions 21a to 21d. A plurality of welding marks 14 are formed all around the periphery of the peripheral portion. Further, together with the welding mark 14, a set of welding marks is formed on the boundary between the peripheral portion of the mask body 10 and the pair of second protrusions 12a and 12b. The one set of welding marks form the ruled line portions 13a to 13d. In ultrasonic welding, since a mold is pressed from the face contact surface side of the face seal portion 20, weld marks corresponding to the weld marks 14 and the ruled line portions 13a to 13d are formed on the face contact surface of the face seal portion 20, These are all concave grooves. On the other hand, welding marks corresponding to welding marks 14 and ruled line portions 13a to 13d are formed on the face non-contacting surface of mask body 10, all of which are convex grooves, and these are thin convex grooves having a visible degree It is.

  In addition, ultrasonic welding can not be applied when the three-dimensional shaped face-to-face cushion along the contour of the face is used as in the disposable dustproof mask described in Patent Document 1. Since the ultrasonic welding machine that performs ultrasonic welding uses an ultrasonic transducer, the vibration of ultrasonic waves can not be efficiently transmitted unless it is on a flat surface, and welding with the filter portion is difficult. Therefore, ultrasonic welding is unsuitable for welding between the three-dimensional shaped face-contact cushion and the filter portion described in Patent Document 1.

  The material of the face seal portion 20 is not particularly limited as long as it can be elastically deformed according to the unevenness of at least the nose and cheek bones and has appropriate flexibility. For example, a sheet material having a laminated structure of a foamed elastic body layer and a fiber non-woven fabric layer joined to one surface of the foamed elastic body layer can be applied. As such a sheet material, for example, a foam elastic layer formed of a foamed elastic body having a predetermined elastic recovery property such as urethane foam or polyethylene foam, and a fiber formed of a fiber non-woven fabric containing thermoplastic synthetic fibers The sheet material etc. which fixed the nonwoven fabric layer mutually via an adhesive agent, etc. can be mentioned. In the present embodiment, if leakage of outside air can be prevented without putting a burden on the wearer, the above-mentioned sheet material is applied to at least the area in contact with the nose and cheek bones, and different sheet materials to other areas. May be applied.

  In this embodiment, the sheet material in which the foam elastic body layer of a closed cell is provided in the face non-contact surface side (inner layer) and the fiber non-woven fabric layer is provided in the face contact surface side (outer layer) is applied. By providing the fiber non-woven fabric layer on the face-contacting surface side, the feel is improved, and the face seal portion 20 is excellent in quick drying and reduced in stickiness to the skin. Further, by providing the foamed elastic layer on the non-face-contacting surface side, the foamed elastic layer is elastically deformed in accordance with the unevenness of the nose and cheek bones of the wearer, and the face seal 20 fits on the face and the outside As well as preventing the dust from entering from the side, even when the tension of one set of the straps 30 is small, the wearing feeling (wearing feeling) is not impaired. In this case, one set of straps 30 does not bend, and the dustproof mask 1 is fixed at a predetermined position on the face and has a tension that does not slip off. In addition, since the foamed elastic layer is a closed cell and has no air permeability, the air does not leak even if the fibrous nonwoven fabric layer has air permeability. In addition, the face seal part 20 may be formed only from the foam elastic body layer of a closed cell as needed.

  One set of straps 30 is preferably elastically stretchable, and is formed of a known elastic material such as a non-woven fabric, a woven fabric, a plastic film, a rubber strap or the like. As such an elastic material, for example, round rubber having a circular cross section or plain rubber having a rectangular cross section can be used. In the present embodiment, both ends of one of the straps 30 of one pair of straps 30 are fixed to the surfaces of the pair of first protrusions 11a and 11b, respectively, and formed in an annular shape without a free end. It can be hung on the top or back of the person. On the other hand, both ends of the other strap 30 of one pair of straps 30 are respectively fixed to the surfaces of the one pair of second protrusions 12a and 12b and formed in an annular shape without a free end, and the neck of the wearer It can be hung on the

  There is no particular limitation on the method of fixing one set of straps 30. For example, welding by heat, ultrasonic waves, etc., sewing, an adhesive or the like may be applied. In this embodiment, both ends of one set of straps 30 are ultrasonically welded to the non-face-contact surface side of one set of the first protrusions 11a and 11b and one set of the second protrusions 12a and 12b, respectively. Sound wave welding was applied and fixed. Therefore, welding marks 15 are respectively formed on the face non-contact parts at both ends of one set of the straps 30 and the face contact surfaces of the protrusions 21 a to 21 d of the corresponding face seal part 20. Since ultrasonic welding presses the mold from the non-face-contacting surface side of the mask main body 10, welding marks 15 (concave grooves) are formed on the non-face-contacting surfaces of both ends of one set of straps 30, The welding marks 15 on the face contact surfaces 21a to 21d are thin convex grooves that are visible.

  In this embodiment, an ultrasonic horn mold (not shown) is formed with an ultrasonic weld (not shown) in which the weld marks 14 and 15 have a rectangular shape when viewed from the front of the non-face contact surface of the mask body 10. The ultrasonic welding of the mask main body 10 and the face seal portion and the ultrasonic welding of one set of straps 30 are performed using the above, but the present invention is not limited thereto. For example, using ultrasonic horn molds (not shown) having different shapes from those described above and ultrasonic welds (not shown), the shapes of weld marks 14 and 15 may be circular, elliptical, polygonal, etc. It may be provided in the shape which combined the shape. Alternatively, when ultrasonic welding of one set of straps 30 is performed, knurling or the like may be performed to form welding marks 14 and 15. Although not shown, for example, a known length adjustment mechanism such as a buckle may be used to adjust the length of one set of straps 30.

(How to wear a dustproof mask)
Next, a method of wearing the dustproof mask 1 of the present embodiment will be described.
In FIG. 5, (a) is a perspective view showing a state before bending a pair of second protrusions of the dustproof mask, and (b) is a perspective view showing a bent state. FIG. 6 is a view showing a state in which one second protrusion of the cross-sectional view along the line B-B 'of FIG. 4B is bent.

  First, the dustproof mask 1 is held in one hand, and the strap 30 on the jaw side is adjusted to an appropriate length over the neck. At this time, as shown in FIG. 5A, the pair of first protrusions 11a and 11b of the dustproof mask 1 and the pair of second protrusions 12a and 12b are not bent. Next, the nose portion and the mouth portion are inserted through the opening 22 of the face seal portion 20 and the dustproof mask 1 is pressed against the face to adjust the tension of the chin strap 30 applied to the neck and also dustproof with one hand. While holding down the mask 1, the strap 30 on the nose side is extended to the top of the head with the other hand, and the tension of the strap 30 on the nose side is adjusted to fix the dustproof mask 1 so as not to come off the face. At this time, although the pair of first protrusions 11a and 11b of the dustproof mask 1 is not bent, as shown in FIG. 5 (b) and FIG. Since the second protrusions 12a and 12b are bent by the ruled line portions 13a to 13d, the dustproof mask 1 can be brought into close contact with the face.

  Here, the dustproof mask 1 is worn on the mannequin M, and the wearing condition will be described. At this time, the dustproof mask 1 adjusts the length of one set of straps 30 and is fixed at a predetermined position on the face.

  In FIG. 7, (a) is an enlarged photograph of one of the first protrusions in the photograph when the dustproof mask is worn, and (b) is an enlarged photograph of one of the second protrusions. As shown in FIG. 7A, the dustproof mask 1 has a cheekbone holding structure that wraps the cheekbone with the entire pair of first protrusions 11a and 11b (one first protrusion 11b is not shown) when worn. Since the face seal part 20 of the nose part and the cheek bone part is elastically deformed in part, an appropriate pressure is applied around the nose part and the cheek bone part, and the dustproof mask 1 can be closely attached to the face. .

  Further, as shown in FIG. 7 (b), the dustproof mask 1 has a pair of second protrusions 12a and 12b (one second protrusion 12b is not shown) facing outward from the side lower portion of the peripheral edge. (B) form a bent structure in which ruled line portions 13a to 13d are provided at the boundary with one set of second protrusions 12a and 12b, so that one set of second protrusions 12a and 12b naturally The dustproof mask 1 can be brought into close contact with the face without bending and deforming the face seal portions 20 of the cheeks and the jaws.

  The dustproof mask 1 has a pair of first projections 11a and 11b and a pair of first projections 11a and 11b by the cheekbone holding structure of one pair of first projections 11a and 11b and the bending structure of one pair of second projections 12a and 12b. The formation of distortion between the second protrusion 12a and 12b and the area of the area corresponding to the chin from the cheek of the face seal 20 is suppressed, and the stimulation by pressing the face of the face seal 20 is greatly reduced. Can be reduced.

  Then, after wearing the dustproof mask 1, the adhesion to the face is checked. Specifically, it is confirmed by a method (qualitative method; measuring a leak rate) using a known apparatus for confirming the goodness or badness of the adhesiveness, or a fit check. Here, the method of using the well-known apparatus which confirms the quality of adhesiveness is a method as described in the below-mentioned test example 1, for example. Further, the fit check is a method in which the dustproof mask 1 is covered with both hands and breathed out, and the wearer confirms leakage of air from the gap between the dustproof mask 1 and the face. If it can be confirmed that there is no air leakage by this method, it is judged that the adhesion of the dustproof mask 1 is good. On the other hand, when there is an air leak, the position of the dustproof mask 1 and the tension of one set of laces 30 are adjusted. In the present embodiment, as described above, since the formation of necking and distortion of the dustproof mask 1 is suppressed, the adhesion of the dustproof mask 1 is good.

(Method of manufacturing a dustproof mask)
Next, the manufacturing method of the dustproof mask 1 of this embodiment is demonstrated.
In FIG. 8, (a) to (e) are diagrams showing each manufacturing process of the dustproof mask. In FIG. 9, (a) is a back view of the ultrasonic horn mold, and (b) is a front view of the dustproof mask before the fastening of the strap.

  First, as shown in FIG. 8A, as a sheet material having good air permeability, the shape-retaining sheet material 100 for holding the shape of the mask main body 10 is pressed with a heated press die 200 to form a cup shape It shape | molded to the type | mold) and obtained the shape-retaining cup part 101.

  Next, as shown in FIG. 8 (b), the filter material 110 for providing the filter function is pushed into the mask main body 10 into the obtained shape-retaining cup portion 101, and the welding portion 211 of the welding device 210 is used. The shape holding cup portion 101 and the pressed filter material 110 were welded to obtain a mask cup material 120. In addition, welding marks 121 were formed at four places (two places omitted in the drawing) of the bottom of the mask cup material 120.

  Next, as shown in FIG. 8C, a sheet material 130 having a laminated structure of a foamed elastic layer (not shown) and a fibrous nonwoven fabric layer (not shown) joined to one surface of the foamed elastic layer. After cutting out (not shown), the sheet material 130 was cut using a cutting device 220 having a cutting blade 221 having a predetermined shape to form an opening 131, and a face seal material 132 was obtained.

  Next, as shown in FIG. 8 (d), the obtained face seal material 132 is positioned and placed on the obtained mask cup material 120, and the welding portion 231 of the welding device 230 is used to face the face The sealing material 132 and the mask cup material 120 were welded and temporarily fixed to obtain a mask precursor 140. In addition, welding marks 141 were formed at two places on the surface portion of the mask precursor 140.

  Next, as shown in FIG. 8 (e), the obtained mask precursor 140 is placed on the anvil 241 (receiving jig) of the ultrasonic welding machine 240 (ultrasonic welder) to transmit ultrasonic waves not shown. The face seal material 132 of the mask precursor 140 and the mask cup material 120 were ultrasonically welded using an ultrasonic horn die 242 of an ultrasonic transducer connected to the machine. A welding mark 142 due to the ultrasonic welding part 243 of the ultrasonic horn die 242 was formed on the surface portion inward of the welding mark 141 of the ultrasonically welded mask precursor 140.

  Here, as shown in FIG. 9A, an ultrasonic welding portion 243 is formed on the bottom surface of the ultrasonic horn mold 242 of the ultrasonic welding machine 240. The ultrasonic welding part 243 can not transmit the vibration of the ultrasonic wave if the surface of the member to be ultrasonically welded has unevenness, and is suitable for welding a flat member having no unevenness on the surface. Since the welding part of the face seal material 132 and the mask cup material 120 of the mask precursor 140 of the present embodiment is a flat surface, the ultrasonic welding machine 240 can be applied.

  Further, a in FIG. 9A indicates a cut portion (hereinafter referred to as “cut portion a”) of the obtained mask precursor 140, and this cut portion a represents the outline of the dustproof mask 1. ing. The ultrasonic welding part 243 is on the cutting part a of the mask precursor 140, and is a rectangular first welding part arranged radially from the cutting part a toward the periphery of the bottom surface of the ultrasonic horn mold 242. Rectangular second welds 245 and a second weld 245 corresponding to a region corresponding to the boundary between the dustproof mask 1 and the pair of second protrusions 12a and 12b and arranged along the periphery of the cut portion a. 3 and a welded portion 246. The second welded portion 245 and the third welded portion 246 are disposed apart from each other. The welding mark 142 formed by the first welding portion 244 is the welding mark 14 shown in FIG. Moreover, the 2nd welding part 245 and the 3rd welding part 246 turn into the ruled line parts 13a-13d shown in FIG.

  Next, when the mask precursor 140 is cut using a cutting device (not shown) having a cutting blade having a shape matched to the cutting portion a, the dustproof mask precursor 150 shown in FIG. 9B is obtained. The dustproof mask precursor 150 is one before welding a pair of straps 30 and has a shape that matches the cut portion a in a front view. In addition, b in the figure has shown the position (Hereafter, it is called "the braid attachment position b.") Which welds the both ends of 1 set of lacings 30 mentioned later.

  Next, with respect to the obtained dustproof mask precursor 150, both ends of one set of straps 30 are positioned at the braid attachment position b shown in FIG. 9 (b) and welded by an ultrasonic welder (not shown). The dustproof mask 1 is obtained by fixing it.

  The invention will now be described in more detail with reference to the following examples.

(Example)
In the example, the dustproof mask 1 (see FIGS. 1 to 3) of the first embodiment was produced by the procedure shown below. In the examples, the method of manufacturing the dustproof mask 1 according to the second embodiment (see FIGS. 8A to 8E and FIGS. 9A and 9B) is referred to.

  First, a polypropylene-based spunbonded non-woven fabric (PPSB non-woven fabric) and a polyethylene terephthalate non-woven fabric (PET non-woven fabric) are laminated, pressed with a heated press die 200, and molded into a cup shape (wedge shape) Obtained part 101. Next, the filter material 110 in which a polypropylene-based meltblown nonwoven fabric (PPMB nonwoven fabric) and a PPSB nonwoven fabric are laminated is pushed into the obtained shape-retaining cup portion 101, and the shape-retaining cup portion 101 is The pressed-in filter material 110 was welded at four points to obtain a mask cup material 120. Then, a sheet material 130 in which a polypropylene-based spunlace non-woven fabric is attached to a polyethylene-based foamed elastic body layer is cut out to form an opening 131, and a face sealing material 132 is obtained. The obtained face seal material 132 was positioned and placed on the mask cup material 120, and the outer edge was pre-welded at two points to obtain a mask precursor 140. Next, the face seal material 132 of the mask precursor 140 and the mask cup material 120 were welded using an ultrasonic welder 240. At this time, welding marks 142 formed by the ultrasonic welding portion 243 of the ultrasonic horn die 242 of the ultrasonic welding machine 240 were formed on the peripheral portion of the mask precursor 140. Next, after a peripheral portion of the mask precursor 140 is cut using a cutting device (not shown) having a cutting blade having a shape conforming to the cutting portion a to obtain a dustproof mask precursor 150, a dustproof mask precursor 150 The two ends of one set of straps 30 were ultrasonically welded to the braid attachment position b, to obtain a dustproof mask 1.

(Comparative example)
In the comparative example, one pair of first protrusions 11a and 11b and one pair of second protrusions 12a and 12b of the dustproof mask 1 (hereinafter referred to as "the mask of the embodiment") manufactured in the embodiment are bent. It fixed so that there was no, and the dustproof mask (henceforth "the mask of a comparative example") was produced.

(Test Example 1: Measurement of leak rate)
The leak rate of both was measured using the mask of the example and the dustproof mask of the comparative example. In Test Example 1, the calculation of the leakage rate specified in Article 7, Section 3, Item 2 of the dustproof mask standard established based on the provisions of Article 42 of the Occupational Safety and Health Act (Law No. 57 of 1972) Based on the method, one person was selected from each face division shown in Table 1 below, and a total of 10 persons were taken as subjects a to j.

  For measurement of the leak rate, a ROKEN-type mask fitting tester (manufactured by Shibata Scientific Co., Ltd., type MT-05) was used as a measuring machine. The subjects a to j shown in the above Table 1 breathed while wearing the masks of the example and the mask of the comparative example. At this time, air dust particles of 0.3 μm to 0.5 μm were used as target particles, and the leak rate was measured by the ratio of the number of observed outer and inner masks, and the results are shown in Table 2 below.

  When outside air (outside of each mask) containing target particles passes through the filter portion (mask body 10) of each mask, the target particles are efficiently filtered in the filter portion. When the target particles are filtered, the target particles in each mask are measured less than the target particles outside each mask (atmosphere) by the measuring device, and the leakage rate becomes smaller. On the other hand, when external air leaks from the gap between each mask and the face, target particles are not filtered, so the target particles in each mask increase and the leak rate becomes large. Therefore, the smaller (or higher) the leak rate, the higher (or lower) the adhesion between each mask and the face. In addition, the said measuring device used following formula (1), when calculating the leak rate of each mask.

Leak rate (%) = (Ni / No) × 100 (1)
(In the formula, Ni is the number of target particles in each mask, and No is the number of target particles outside each mask.)

  As shown in Table 2 above, the leak rate of all the subjects a to j was reduced compared to the mask of the comparative example. That is, it was revealed that the mask of the example enhances the adhesion between the mask and the face when worn as compared to the mask of the comparative example.

(Test example 2: sensory test)
When subjects a to j shown in the above Table 1 wear the masks of the example and the mask of the comparative example, a hearing survey as to whether or not they feel a sense of oppression such as discomfort or pain and a feeling of leakage The results are shown in Table 3 below.

  As shown in Table 3 above, 9 out of 10 subjects felt a sense of oppression or leak when wearing the mask of the comparative example. It was suggested that this result was correlated with the measurement results of the leak rate shown in Table 2 above. In particular, no subject felt a sense of leakage on the cheek when wearing the mask of the example, while seven subjects experienced a sense of leakage on the cheek when wearing the mask of the comparative example. From this result, it was suggested that the effect by forming the cheekbone part holding structure in the mask of the example. That is, in the mask of Example 1, the face seal portion 20 of the nose portion and the cheek bone portion is elastically deformed to apply appropriate pressure around the nose portion and the cheek bone portion, so that the mask can be closely attached to the face. It seems that there were few subjects who felt a sense of leakage.

  In addition, while one subject felt a sense of leakage in the jaw when wearing the mask of the example, three subjects experienced a sense of leakage in the jaw when wearing the mask of the comparative example. . From this result, it was suggested that the effect of forming the bent structure in the mask of the example was obtained. That is, in the mask of Example 1, the pair of second protrusions 12a and 12b is naturally bent, and the mask is brought into close contact with the face without elastically deforming the face seal portion 20 of the wearer's cheeks and jaws. It is considered that there were few subjects who could feel the leak in their jaws.

  Furthermore, since the subject who felt a sense of oppression (suffered discomfort) at the time of wearing each mask was more in the comparative example compared with the example, the relief of the oppression is the cheekbone of the example. It was suggested that it was an effect by forming a part holding structure and the above-mentioned bending structure. That is, the mask of Example 1 can adjust the pressure on the face by the face seal part 20 by causing elastic deformation of the face seal part 20 according to the part of the face, and the subject who felt a feeling of pressure It is thought that there was little

(Other embodiments)
The dustproof mask of the present invention is not limited to the above configuration as long as a cheekbone holding structure and a bent structure are formed, and can be appropriately designed as needed. Hereinafter, other embodiments of the dustproof mask of the present invention will be described.

  In FIG. 10, (a) and (b) are front views of the dustproof mask of another embodiment. The dustproof mask 1A shown in (a) of FIG. 10 has the same configuration as the dustproof mask 1 of the first embodiment except that one set of fasteners 30A is provided to one set of straps 30A. It is a thing. When wearing the dustproof mask 1A, while holding the mask body 10A of the dustproof mask 1A with the nose and jaws covered, the strap 30A on the nose side is on the top of the head and the strap 30A on the jaw side Around the neck, one set of fasteners 40A enables adjustment of the length of one set of laces 30A. According to the dustproof mask 1A, since one set of straps 30A is not put on the ear, the burden on the ears is reduced and discomfort such as itching and pain by one set of straps 30A is reduced. Can. In addition, since one set of fasteners 40A is an adjuster, the length of one set of straps 30A can be easily adjusted, and the dustproof mask 1A can be fixed at a predetermined position on the face. The dustproof mask 1A may have a configuration in which one fixing tool 40A is provided to any one of a pair of straps 30A.

  Further, the dustproof mask 1B shown in (b) of FIG. 10 is a side hook type in which the fixing tool 50B is provided to one of the one strap 30B of one pair of straps 30B. It has the same configuration as the dustproof mask 1. When wearing the dustproof mask 1B, while holding the mask body 10B of the dustproof mask 1B in a state of covering the nose and the jaws, one set of laces 30B is put on the back of the head to fix one lace 30B. The other strap 30B is hooked and fixed to the hook portion 51B of 50B, and the adjuster portion 52B of the fixture 50B enables adjustment of the length of the one strap 30B. According to the dustproof mask 1B, since it is not necessary to put one set of straps 30B on the ear, it is possible to reduce the burden and discomfort on the ears, and the length of one strap 30B can be obtained by the fixing device 50B. And the dustproof mask 1B can be fixed at a predetermined position on the face. The dustproof mask 1B may have a configuration in which one set of fixing tools 50B is provided to one set of straps 30B.

  In FIG. 11, (a)-(c) are front views of the dustproof mask of other embodiment. In addition, in FIG. 11A, for convenience of explanation, a part of one set of straps 30C is omitted. The dustproof mask 1C shown in (a) of FIG. 11 has the same structure as the dustproof mask 1 of the first embodiment except that the exhaust valve 60C is provided in the mask main body 10C, and is shown in (b) The dustproof mask 1D has the same configuration as the dustproof mask 1A except that the mask body 10D is provided with the exhaust valve 60D, and the dustproof mask 1E shown in (c) has an exhaust valve on the mask body 10E. It has the same configuration as the dustproof mask 1B except that 60E is provided.

  Since the exhaust valves 60C to 60E are closed when inhaling and the exhaust valves 60C to 60E are opened when exhaling these dust masks 1C to 1E, the exhalation and moisture in the dust masks 1C to 1E are exhausted and the inflow of external air is suppressed be able to. The dust masks 1C to 1E, as exhaust valves 60C to 60E, close a valve (not shown) at the time of intake to prevent inhalation of outside air, and at the time of exhalation, the valve opens to prevent retention of exhalation in the dust masks 1C to 1E and discharge moisture. Although the one-way valve which has the following structure was applied, it is not limited to this structure. For example, a valve having a configuration in which the exhaust valve is opened with the center as a fulcrum and the exhalation is discharged concentrically, or a configuration in which the exhaust valve is opened with one fulcrum and the exhalation is discharged to increase one discharge May be In addition, the number and the position at the time of providing exhaust valve 60C-60E in dustproof masks 1C-1E are not specifically limited, According to need, it may design suitably.

  In the present invention, fine dust such as pollen, yellow sand, exhaust gas of car; very fine scattered particle substance having a particle size of 2.5 μm or less called PM 2.5; fine particle such as harmful substance which adversely affects human body It is useful as a dustproof mask, especially as a disposable dustproof mask, used not only in welding sites, polishing / cutting workplaces, construction sites for crushing work, research facilities, etc. but also in daily life as defense measures against substances etc.

1, 1A, 1B, 1C, 1D, 1E Dustproof masks 10, 10A, 10B, 10C, 10D, 10E, mask bodies 11a, 11b first protrusions 12a, 12b second protrusions 13a, 13b, 13c, 13d 14, 15, 121, 141, 142 weld marks 20 face seal parts 21a, 21b, 21c, 21d protrusions 22, 131 openings 30, 30A, 30B, 30C cords 40A, 50B fixing members 51B hook parts 52B adjuster parts 60C , 60D, 60E exhaust valve 100 shape holding sheet material 101 shape holding cup portion 110 filter material 120 mask cup material 130 sheet material 132 face seal material 140 mask precursor 150 dust mask precursor 200 press mold 210, 230 welding apparatus 211, 231 welds 220 Sectional device 221 the cutting blade 240 ultrasonic welder 241 anvil 242 ultrasonic horn mold 243 ultrasonic weld 244 first weld portion 245 second weld portion 246 third welded portion M manikin a cutting section b braid mounting position

Claims (7)

A mask main body formed by bulging in a cup shape excluding the peripheral portion;
A dustproof mask comprising: a face seal portion in which the peripheral edge of the outer peripheral edge is fixed to a part of the peripheral edge of the peripheral portion of the mask body and the inner peripheral edge protrudes inward;
A pair of first protrusions which respectively protrude radially outward from an end portion on the side surface upper side of the peripheral portion of the mask body;
A pair of second protrusions which respectively protrude radially outward from an end of the side surface lower side of the peripheral portion of the mask body;
A ruled line portion formed of a recessed groove recessed from a surface on the face seal portion side of the pair of second protrusions at a boundary between the peripheral portion of the mask main body and the pair of second protrusions; A dustproof mask characterized by having.   2. The dustproof mask according to claim 1, wherein the mask body, the set of first protrusions, and the set of second protrusions are integrally formed of a sheet material.   In the face seal portion, the periphery of the outer periphery is fixed to the entire periphery of the periphery of the periphery of the mask body, and the inner periphery protrudes inward to surround the region corresponding to the nose and the mouth The dustproof mask according to claim 1 or 2, wherein an opening is formed. The face seal portion includes a set of third protrusions which respectively protrude radially outward from the peripheral edge of the outer peripheral edge corresponding to the set of first protrusions, and the set of second protrusions. And a set of fourth projections respectively projecting radially outward from the periphery of the corresponding outer peripheral edge,
The peripheral edge of the peripheral portion of the one set of third protrusions is fixed to the peripheral edge of the peripheral portion of the one pair of first protrusions, and the peripheral edge of the peripheral portion of the one set of fourth protrusions is the one pair The dustproof mask according to any one of claims 1 to 3, wherein the dustproof mask is fixed to a peripheral edge of a peripheral edge portion of the second projecting portion.   The face seal portion, the one set of third projecting portions, and the one set of fourth projecting portions are integrally formed of a sheet material made of a foamed elastic body. Dustproof mask described in.   6. The apparatus according to claim 1, wherein the ruled line portion comprises two recessed grooves which are separated from each other and are provided from the surface on the face seal portion side of the pair of second protrusions. The dustproof mask according to any one of the preceding claims. Equipped with a pair of straps each having two fixed ends,
One of the pair of straps has two fixed ends fixed to the first set of the first set, and the other has two fixed ends fixed to the second set of the pair. The dustproof mask according to any one of claims 1 to 6, characterized in that: