JPH09152397A - Dust-proof mask fixing device in tester for dust-proof mask performance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the adhesion between a dust-proof mask measuring holder and a dust-proof mask for high measurement accuracy by covering the dust- proof mask measuring holder with a contact type holder and providing air feeding and discharging ports between the measuring holder and the contact type holder. SOLUTION: The surface of a dust-proof measuring holder 4 is covered with a contact type holder 8 made of flexible rubber film that is the same in shape as the holder 4. The holder is expanded and adhered tightly to the inner part of a dust-proof mask fitted on the holder 4 by the holders 4 and 8 by using air feeding and discharging ports 9 and 10. Namely, the holder 8 is adhered to its periphery and the inner circumferential surface holder 4 in a test air suction port 7 for the holder 4, and when an air is supplied from the ports 9 and 10, the entire part excluding the adhered part is expanded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust-proof mask fixing apparatus for a dust-proof mask performance test apparatus, wherein a test dust-proof mask can be brought into close contact with a dust-proof mask measurement holder in the dust-proof mask performance test apparatus.

[0002]

2. Description of the Related Art Generally, a method for testing the performance of a dust mask is described in J.
It is stipulated in IS, and based on this, the national examination standard is set. In this case, when the wearer of the dust mask actually uses the dust mask, it is necessary to check the adhesion state of the mounting surface, the operation state of the valve of the dust mask, the efficiency of the filter material of the dust mask, etc. Comprehensive evaluation of dust masks is available as a test and a fit test.

[0003] In these devices, a worker wears a dust mask, measures the number of particles inside and outside the dust mask, and obtains a particle leakage rate from the measured value. Since there are many types of dust masks, the degree of adhesion between the human face and the dust mask is not uniform. Therefore, in order to make the evaluation as objective as possible, instead of a human face, create a dust mask measurement holder that simulates the human face with iron, aluminum, plastic, etc., and attach a dust mask to this holder to prevent particle leakage. Often the rate is measured.

[0004]

However, even in the above-mentioned conventional holder for measuring a dust mask, since there are many types of dust masks, if the types are different, the dust mask does not adhere to the holder for measuring the dust mask. In order to prevent air leakage between the two, a dedicated dust-proof mask measuring holder must be prepared for each type of dust-proof mask, which is practically uneconomical. Also, the smoothness of the surface of the dust mask measurement holder is often a problem in the nature of the test. Even a slight rough surface on the dust mask measurement holder may affect the measured value. As described above, the adhesion between the dust-proof mask measurement holder and the dust-proof mask is narrow due to the variety of dust-proof masks, and has been the most important problem to be solved.

[0005]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems, has a simple structure, can widely cope with various kinds of dust masks, and has a high degree of adhesion with the dust masks. In order to obtain a dust-proof mask fixing device in a dust-proof mask performance test device with improved measurement accuracy, the dust mask measurement holder in the dust-proof mask performance test device is covered with a face contact holder made of an elastic rubber film. Further, an air supply / exhaust port for supplying / exhausting air is provided between the dust-proof mask measurement holder and the face body close-contact holder.

When air is supplied between the dust-proof mask measuring holder and the face-piece contact holder having such a configuration to expand the face-piece contact holder, the portion of the dust-proof mask that contacts the human surface has a complicated curved surface. Nevertheless, the degree of adhesion between the face-piece contact holder and the dust mask is increased, and the accuracy of the measured values in the performance test of the dust mask is dramatically improved.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In the dust mask fixing apparatus in the dust mask performance testing apparatus of the present invention, the dust mask measuring holder in the dust mask performance testing apparatus is covered with a face contact holder made of an elastic rubber film.
Further, an air supply / exhaust port for supplying / exhausting air is provided between the dust-proof mask measurement holder and the face body close-contact holder. In this case, in order to increase the degree of adhesion between the dust-proof mask measurement holder and the face-piece contact holder and the dust-proof mask,
It is preferable that the dust-proof mask measurement holder and the face contact holder are formed in a substantially semi-elliptical spherical shape, and a protruding portion that models the nose of the human face is provided on a portion corresponding to one of the human faces on the long side. . Further, in order to further increase the degree of adhesion between the face mask contact holder and the dust mask, it is preferable that the face mask contact holder covered by the dust mask mask holder has the same shape as the surface of the dust mask mask holder. further,
The air supply / exhaust port may be provided anywhere as long as air is supplied / exhausted between the dust-proof mask measurement holder and the face-piece contact holder, but the curved surface with the dust-proof mask when the face-piece contact holder expands can be used. In order to ensure the close contact between the parts and further enhance the degree of close contact between the two parts, it is preferable to provide the dust-proof mask measuring holder on both sides of the raised part and on the part corresponding to the chin on the human surface.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a dust-proof mask fixing device in a dust-proof mask performance test apparatus according to the present invention will be described below with reference to the attached drawings. FIG. 1 is an explanatory view of the entire dust mask performance test apparatus, FIG. 2 is an enlarged explanatory view of a part of FIG. 1, FIG.
2B is a plan view and a cross-sectional view of the dust mask fixing device.
A ventilation tube 12 of a holder substrate 5 on which a dust-proof mask measuring holder 4 is mounted is hermetically fitted into a mixer 3 provided at the center of the table 2 of the dust-proof mask performance test apparatus main body 1. The holder 4 for measuring the dust mask is a flat egg-shaped substantially elliptical sphere, and a protruding portion 6 is formed on one of the long sides of the holder corresponding to the nose of the human face. At the center, a test air suction port 7 communicating with a ventilation tube 12 vertically provided at the center of the holder substrate 5 is formed, and a portion corresponding to both sides of the ridge 6 and a jaw of a human surface. Are provided with air supply / exhaust ports 9 and 10 for supplying / exhausting air between the dust-proof mask measurement holder 4 and a face body contact holder 8 described later.

[0009] On the surface of the dust mask measuring holder 4,
A face body close-contact holder 8 made of an elastic rubber thin film is coated in the same shape as the surface of the dust-proof mask measurement holder 4, and the dust-proof mask measurement holder 4 and the face body close-contact holder 8 are connected through the air supply / exhaust ports 9 and 10. When air is supplied in between, the face-sheet contact holder 8 expands and comes into close contact with the part of the dust-proof mask 11 attached to the dust-proof mask measurement holder 4 via the face-sheet contact holder 8 in contact with the human surface. Is configured. That is, the holder 8 for holding the dust mask is located between the periphery of the holder 8 and the inner circumferential surface of the test air suction port 7 of the holder 4 for measuring the dust mask.
When air is supplied from the air supply / exhaust ports 9 and 10, the entire surface excluding the bonded portion expands.

The mixer 3 is connected to a pump 14 through a branch pipe 13.
Is connected to one side of the branch pipe 13 and the valve 15
And a flow meter 17 having a display unit 16, and a three-way solenoid valve 18 for switching between air and outside air in the mixer 3 and a particle counter 1 on the other side of the branch pipe 13.
9 are interposed. The particle counter 19 is C
It is connected to an I / O board 21 which is a data capturing unit connected to the PU 20, and this I / O board 21
It is connected to a judgment display 23 provided on a panel 22 of the dustproof mask performance test apparatus main body 1. The I / O board 21 is connected to a differential pressure gauge 24 for measuring the differential pressure inside the mixer 3, and the air supply / exhaust ports 9 and 10 are connected to a mini pump 27 via a three-way solenoid valve 26 provided with a timer 25. ing. In the figure, reference numeral 28 denotes a start switch attached to the panel 22 of the dust mask performance test apparatus main body 1, and 29 denotes a filter of the dust mask 11.

When using the dust mask fixing device in the dust mask performance testing apparatus thus constructed, for example, a description will be given of a case where a performance test is performed to determine whether the dust mask currently in use is continuously suitable for use. . First, mixer 3
The cylinder 12 of the holder substrate 5 is air-tightly fitted in the holder substrate 5 and the portion corresponding to the nose of the dust mask 11 to be tested is placed on the dust mask measuring holder 4 via the face-body contact holder 8. When the dust mask 11 is lightly pressed and then the start switch 28 is pressed, the pump 14 is driven and suction from the test air suction port 7 is started. The amount of air suction by the pump 14 is adjusted by the valve 15 while checking the display section 16 of the flow meter 17.

Then, the mini-pump 27 is started, and air is supplied between the dust-proof mask measuring holder 4 and the face-sheet contact holder 8 from the air supply / exhaust ports 9 and 10 via the three-way solenoid valve 26. Dust mask 11
Expands according to the shape of the dust-proof mask 11 inside the inside, so that the joint with the dust-proof mask 11 is brought into close contact. The degree of expansion of the face contact holder 8 is determined by a timer 25 and a three-way solenoid valve 26.
Is adjusted by When the suction of air from the test air suction port 7 is started, the filter 29 of the dustproof mask 11 is
The air having passed through the air reaches the particle counter 19 via the three-way solenoid valve 18, and the particle counter 19 measures dust particles in the air.

After measurement of the air that has passed through the filter 29 of the dust mask 11 has been performed for a predetermined time, the three-way solenoid valve 18 is switched, air in the air is sucked, and dust particles in the air are measured by the particle counter 19. As described above, the numerical values of the dust particles in both air measured by the particle counter 19 are transmitted through the I / O board 21 to the CP.
The calculation process is performed by U20, and the determination display 23 displays the result of the propriety of the continuous use of the dustproof mask 11.

[0014]

The present invention is embodied in the form described above and has the following effects. The dust-proof mask measurement holder is covered with a flat body contact holder made of a stretchable rubber film, so that when air is supplied between the two, the part of the dust-proof mask that contacts the human surface has a complicated curved surface. Nevertheless, even if the holder for measuring the dust mask and the protective mask have a rough surface in contact with the human surface, the face mask holder is in close contact with the dust mask. Air leakage between the holder and the dust mask can be easily prevented, the accuracy of the measured value of the dust mask performance of the dust mask can be improved, and a wide variety of dust mask shapes can be widely used, which is economically practical.

The holder for measuring the dust mask and the holder for contacting the face body are formed in a substantially semi-elliptical sphere, and a protruding portion obtained by molding the nose of the human face is formed on the long side of the holder corresponding to the nose of the human face. Is provided, and the face body close-contact holder covered with the dust mask measurement holder is the same shape as the dust mask measurement holder, and the air supply and exhaust ports are on both sides of the raised portion in the dust mask measurement holder and By being provided in the part corresponding to the chin on the human face,
When air is supplied between the holder for measuring the dust mask and the holder, the intricate curved surface of the dust mask is ensured when the holder is expanded, and the degree of adhesion between the mask and the holder is increased. Is further enhanced,
This has the effect of further improving the performance test accuracy of the dust mask.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of an entire dustproof mask performance test apparatus.

FIG. 2 is a detailed explanatory view showing an embodiment of a main part of a dust mask performance testing apparatus.

FIG. FIG. 2 is a plan view showing an embodiment of a holder for measuring a dustproof mask and a holder in close contact with a face body attached to a holder substrate. Is a. It is a center cross-sectional view of FIG.

[Explanation of symbols]

 4 Dustproof mask measurement holder 6 Raised part 8 Face body close-contact holder 9, 10 Air supply / exhaust port

Claims (4)

[Claims] 1. A dust mask measuring holder (4) in a dust mask performance testing apparatus is covered with a face mask contact holder (8) made of an elastic rubber film, and the dust mask measuring holder (4) and the face mask are in close contact with each other. Air supply / exhaust ports (9) (10) for supplying / exhausting air to / from the holder (8)
Dust mask fixing device in a dust mask performance test device with a hole. 2. A dust-proof mask measuring holder (4) having a substantially semi-elliptical spherical shape, and a protruding part (model) of the human face nose is formed on a portion corresponding to one human face nose on a long side thereof. The dust mask fixing apparatus in the dust mask performance test apparatus according to claim 1, further comprising (6). 3. The holder for covering a face body, which is covered with the holder for measuring dust masks, has the same shape as the surface of the holder for measuring dust masks.
A dust mask fixing apparatus in the dust mask performance test apparatus according to any one of the above. 4. An air supply / exhaust port (9) (10) is provided on both sides of a raised portion (6) and a portion corresponding to a jaw of a human surface in a dust mask measuring holder (4). A dust mask fixing device in the dust mask performance testing device according to claim 3.