Abstract: A mask includes a filter portion that is formed of an air-permeable sheet material and covers at least a nose and a mouth in wearing; a substantially annular face-contacting body that is joined to the filter portion, and is in contact with at least a vicinity of the nose and a vicinity of the mouth on a face in wearing; and a hook string to be hooked around either a head or an ear so that the filter portion and the face-contacting body are worn to the face. Here, a protrusion portion is arranged at least at a part of the face-contacting body to be in contact with at least a vicinity of the nose on the face in wearing to the face and press the filter portion to form a three-dimensional shape allowing the filter portion to conform to unevenness of the face.

Abstract: The present invention aims to provide a sheet of microfiber assembly having a high filtering performance suitable as an oil-mist filter. A sheet of microfiber assembly 2 comprises microfibers 1 each having a fiber diameter of 3,000 nm or less and is formed of a mixture of water-insoluble but alcohol-soluble acetalized polyvinyl alcohol resin and water-insoluble but alcohol-soluble fluorine resin.

Abstract: There is provided a mask provided with a latch that can maintain a latched state of fastening cords and suppress offsetting when the mask is worn. A latch of a mask is in the form of an oblong thin sheet, and includes a first latching part for disengageably latching one fastening cord of the mask and a second latching part positioned on the second end edge side of the first latching part, having an insertion through hole for inserting the other fastening cord of the mask in advance. The first latching part has a guide channel extending from the first lateral edge and a first latching hole connected to the guide channel, and the second latching part has a second latching hole communicating with the insertion through hole, and having an outer shape smaller than that, and the first latching hole and the second latching hole are directed in directions opposed to one another in a lateral direction.

Abstract: The local air cleaning apparatus 1 causes a cleaned uniform air flow blown out from an air flow opening face 23 to collide with an air collision face W to flow outside an open region, so as to cause cleanliness to be higher inside a guide 3 and inside the open region than other regions. Additionally, the apparatus 1 includes at least one of a device for measuring pressures inside the guide 3 and inside a push hood 2, a device for measuring the cleanliness inside the guide 3 or of the open region, and a device for measuring a gap area between the guide 3 and the air collision face W, and, to ensure the cleanliness from a result of the measurement, controls such that a flow velocity of the cleaned uniform air flow blown out from the air flow opening face 23 can be decelerated or accelerated.

Abstract: An air blowing device adapted to be used in such a manner that at least two of the devices are horizontally and/or vertically aligned with each other, thereby to obtain a uniform flow of air in the downstream direction from device to device. An air-permeable front surface (11f) is formed to the blowing device (1) at the downstream side of a rectifier mechanism, and side surface sections (11a) which extend in the upstream direction of the device (1) are formed at both edges of the air-permeable front surface (11f). First ventilation holes (70a) are distributed at the air-permeable front surface (11f), and second ventilation holes (70b) are distributed at the side surface sections (11a).

Abstract: A local air cleaning apparatus (1) is provided with a push hood (2) having an air flow opening face (23) for blowing out a cleaned uniform air flow and a guide (3) provided on a side of the push hood (2) having the air flow opening face (23), the guide (3) extending from the side thereof having the air flow opening face (23) toward a downstream side of the uniform air flow to form an opening face (31) at a downstream end portion thereof. The push hood (2) is arranged such that the uniform air flow blown out from the air flow opening face (23) passes through the inside of the guide (3) and then collides with an air collision face (W) on a downstream side of the opening face (31). The opening face (31) of the guide (3) is spaced apart from and opposed to the air collision face (W) to form an open region between the opening face (3) and the air collision face (W).

Abstract: A local air cleaning apparatus (1) is provided with push hoods (2, 3) having an air flow opening face (23) for blowing out a cleaned uniform air flow and a pair of guides (4, 5) provided on sides of the push hoods (2, 3) having the air flow opening faces (23), the guides (4, 5) extending from the sides thereof having the air flow opening faces (23) toward downstream sides of the uniform air flows to form opening faces (41, 51) at downstream-side end portions of the guides. The push hoods (2, 3) are arranged such that the respective air flow opening faces (23) are opposed to each other. The opening faces (41, 51) of the guides (4, 5), are spaced apart from and opposed to each other to form an open region between the opening faces (41, 51) of the respective guides (4, 5).

Abstract: A respiratory protection device in which a plurality of filter units are provided. A respiratory protection device includes a plurality of filter units. Air flow paths that extend to the facepiece are provided in respective filter units. An inhalation port leading in the facepiece is provided at a portion where the air flow paths merge. The inhalation port can be temporarily closed by using an inspection valve included in the fit checker.

Abstract: A respiratory protection device is provided that allows the wearers of a facepiece to smoothly have a conversation with each other. A respiratory protection device includes a facepiece. The protection device also includes a voice amplifier that includes a microphone and a speaker therein, a detection unit that directly or indirectly detects the inner pressure of the facepiece, a power source unit, and a control unit. The control unit controls so as to place the voice amplifier in an operational state or a non-operational state, based on a result of comparison of information from the detection unit with a determination reference in the control unit.

Abstract: Provided is a local clean zone forming apparatus which has an excellent operability and can provide an excellent clean air space without restricting the installation location or the purpose of an operation. In the local clean zone forming apparatus, a pair of push hoods having air blowing surfaces between which an airflow alignment mechanism is formed to form uniform airflows, are disposed so that the uniform airflows discharged from the push hoods are opposite to and collide with each other in a positional relationship wherein the air blowing surfaces are parallel to each other, and the centers of the air blowing surfaces are not directly opposite to each other; and the uniform airflows are obliquely discharged at an angle with respect to the air blowing surfaces.

Abstract: An air blowing device adapted to be used in such a manner that at least two of the devices are horizontally and/or vertically aligned with each other, thereby to obtain a uniform flow of air in the downstream direction from device to device. An air-permeable front surface (11f) is formed to the blowing device (1) at the downstream side of a rectifier mechanism, and side surface sections (11a) which extend in the upstream direction of the device (1) are formed at both edges of the air-permeable front surface (11f). First ventilation holes (70a) are distributed at the air-permeable front surface (11f), and second ventilation holes (70b) are distributed at the side surface sections (11a).

Abstract: Provided is a voice transmitter in a simple structure that can be manufactured at a low cost, and can make speech uttered by a wearer clearly hearable at the outside. In a voice transmitter unit that transmits the speech uttered by the wearer to the outside, a voice transmitter body of the voice transmitter unit includes: a diaphragm member able to transmit the speech from one side to the other side; and a holding member to hold at least a part of the diaphragm member, wherein the diaphragm member is formed of a heat-shrinkable material, and the diaphragm member is heated to be shrunk while the diaphragm member is held by the holding member, thereby holding the diaphragm member by the holding member while substantially an entire surface of the diaphragm member is tensed.

Abstract: A purified air discharge device includes a push hood (2) having an air flow discharge surface (23) discharging a uniform purified air flow. The push hood (2) is provided with a lateral air discharger (28) for creating a purified air flow that collides against a surrounding wall that is formed as the push hood (2) is installed and that is situated close along the circumferential direction of the air flow discharge surface (23) of the push hood (2).

Abstract: An air cleaning apparatus capable of predicting a breakthrough time of a filtering portion is provided. Regarding a mask 1 as one example of the air cleaning apparatus, data on concentration of the poisonous gas element with which in ambient air (40) is contaminated on the upstream side of a filtering portion (3), a flow rate of the air (40) passing through the filtering portion (3), a temperature of the air (40), and relative humidity of the air (40) are input to an arithmetic processing unit (25). A breakthrough-time prediction formula in which the concentration, the flow rate, the temperature, and the relative humidity are provided as variables is programmed in the arithmetic processing unit (25), and the breakthrough time of the filtering portion (3) is calculated through the prediction formula, based on the data on the concentration and the like.

Abstract: Provided is a voice transmitter in a simple structure that can be manufactured at a low cost, and can make speech uttered by a wearer clearly hearable at the outside. In a voice transmitter unit that transmits the speech uttered by the wearer to the outside, a voice transmitter body of the voice transmitter unit includes: a diaphragm member able to transmit the speech from one side to the other side; and a holding member to hold at least a part of the diaphragm member, wherein the diaphragm member is formed of a heat-shrinkable material, and the diaphragm member is heated to be shrunk while the diaphragm member is held by the holding member, thereby holding the diaphragm member by the holding member while substantially an entire surface of the diaphragm member is tensed.

Abstract: A protective garment enabling a wearer of the protective garment to clearly hear external sounds and thereby ensuring the safety of the wearer's work. The protective garment includes: a protective garment main body covering at least the head of a wearer; ear film members formed with a thickness allowing hearing of external sounds; and a maintaining member maintaining the ear film members in contact with the wearer's ears or in proximity to the wearer's ears within a predetermined distance. Since the ear film members are provided and maintained in contact with the wearer's ears or in proximity to the wearer's ears within a predetermined distance, the wearer can clearly hear external sounds.

Abstract: A supply valve for supplying air to a wearer of an air respirator is attached to a facepiece and includes an inflow port for medium-pressure air (S1), a supply port for the medium-pressure air (S1) with respect to the facepiece, and a diaphragm. The supply valve includes a cylindrical housing and a slider that is reciprocally slidable on the inner peripheral surface of the housing in an axial direction thereof. The housing includes a pilot valve seat urged toward a pilot valve on an outer side of the one end portion in the axial direction and a main valve seat on an inner side of an opposite end portion in the axial direction. The inflow port is formed between the one end portion and the opposite end portion. The slider includes the pilot valve contactable with the pilot valve seat and a main valve urged toward the main valve seat.

Abstract: The purified air discharge device comprises a push hood (2) comprising an air flow discharge surface (23) discharging a uniform purified air flow. The push hood (2) is provided with a lateral air discharger (28) for creating a purified air flow that collides against a surrounding wall that is formed as the push hood (2) is installed and that is situated close along the circumferential direction of the air flow discharge surface (23) of the push hood (2).

Abstract: A local air cleaning apparatus (1) is provided with a push hood (2) having an air flow opening face (23) for blowing out a cleaned uniform air flow and a guide (3) provided on a side of the push hood (2) having the air flow opening face (23), the guide (3) extending from the side thereof having the air flow opening face (23) toward a downstream side of the uniform air flow to form an opening face (31) at a downstream end portion thereof. The push hood (2) is arranged such that the uniform air flow blown out from the air flow opening face (23) passes through the inside of the guide (3) and then collides with an air collision face (W) on a downstream side of the opening face (31). The opening face (31) of the guide (3) is spaced apart from and opposed to the air collision face (W) to form an open region between the opening face (3) and the air collision face (W).