JPH0246914Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a filter holder that is attached to a dust mask worn by workers at various work sites where a large amount of dust is generated.

Conventional dust masks are generally configured to purify the inhaled air by passing coarse and fine dust through the same filter housed in a filter housing. When used in a location, it has the drawbacks of being easily clogged with dust from the overfill material, increasing air intake resistance, requiring frequent filter replacement, and high filter consumption, making it uneconomical.

This invention uses the principle of inertial collision to remove relatively coarse dust contained in the intake air by providing an impactor that rapidly changes the flow direction of the intake air inside the outside air intake port of the filter housing. To provide a filter holder for a dust mask, which can collect on the impactor surface or the inner surface of the holder before reaching the filter, extend the service life of the filter, and keep the rise in intake resistance of the dust mask low. It is something.

An embodiment of the present invention will be described below based on FIGS. 1 to 3 of the drawings. 1 is a dust mask; 2 is a dust mask;
1 is a pair of filter holders that are attached to both sides of a dust mask 1. As shown in the second figure, a threaded groove 5 is provided on the outer surface of a circular filter holder body 4 having a ventilation hole 3 at the bottom. In the groove 5, the main body 4
A screw groove 7 provided on the inner surface of the cap 6 covering the opening of the cap 6 is screwed into the cap 6, and an annular intake port 8 is provided in the center of the cap 6. The inertial collision is made of a sticky synthetic resin such as or other sticky material and has a sticky dust collision surface 9 that is formed into a shape that rapidly changes the direction of the air flow taken in through the intake port 8. A plate, that is, an impactor 10 is removably attached to the screw portion 11, and the inner surface of the cap 6 has a
An adhesive surface 12 is provided with an adhesive sticker pasted or an adhesive is applied, and a filter 1 is provided inside the main body 4.
It is made up of 3.

Next, another embodiment of the present invention will be described based on FIGS. 4 and 5. Reference numeral 14 is formed in a bent shape so that it can be attached in series from the center to both sides of the dust mask. As shown in the fourth figure, a filter housing main body 16 having a vent hole 15 at the bottom is connected to a cap 17 that can be opened and closed to cover the opening of the main body 16. A plurality of air intake ports 18 consisting of elongated holes are provided, and the inside of each air intake port 18 is made of adhesive synthetic resin such as acrylic acid ester resin or other sticky material to prevent air taken in from the air intake ports 18. An inertial impact plate, that is, an impactor 20, which is formed into a shape that rapidly changes the flow direction and has an adhesive dust impact surface 19, is provided, and an adhesive sticker is pasted or an adhesive is applied to the inner surface of the cap 17. A coated adhesive surface 21 is provided, and a filter 22 is spread inside the main body 16. Note that the intake port 18 may be formed into a horizontally elongated hole.

When the filter housing 2 or the switch 14 according to each of the above embodiments is attached to a dust mask and the wearer of the dust mask inhales outside air containing dust, immediately after the inhaled air flows into the device from the intake port 8 or 18, Although the inflow direction is rapidly changed by the impactor 10 or 20, relatively coarse dust among the dust contained in the intake air is separated from the intake air by the principle of inertial collision, and the dust collides with the dust collision surface. 9 or 19 and the adhesive surface 12 or 21 and are removed by collision, and the fine dust remaining in the intake air flows with the intake air,
Dust is removed by filter 13 or 22.

In each of the above embodiments, an example was shown in which the impactor was molded from a material with adhesiveness, but it was also molded from a non-adhesive material, and an adhesive sticker was pasted on the dust collision surface.
Alternatively, adhesive may be applied. Furthermore, in each of the above embodiments, the adhesive surface is provided on both the inner surface of the filter housing on the outside air intake port side and the dust collision surface of the impactor, but it is also possible to provide the adhesive surface on either one of them. be. Furthermore, an uneven surface may be formed on the inner surface of the filter housing on the outside air intake side in a portion facing the dust collision surface of the impactor to make it easier for dust to adhere. Further, the shape of the filter housing and the suction port may be formed into a shape other than those of the above-mentioned embodiments.

Since the present invention is constructed as described above, relatively coarse dust contained in the intake air is generated by the inertial collision principle before reaching the dust impact surface of the impactor or the outside air intake of the filter housing. Since only the fine dust collected on the inner surface of the mouth side is removed by the filter, the service life of the filter can be extended.
Even when used in a place with high dust concentration, the filter does not need to be replaced frequently, the consumption of the filter is reduced, it is economical, and the increase in intake resistance is low, making it easier to breathe. In addition, the filter storage container
If the device is composed of a main body and a lid, there is an advantage that the lid can be removed and dust adhering to the dust collision surface of the impactor or the inner surface of the lid can be removed by cleaning or wiping, and the impactor can be used repeatedly.

[Brief explanation of the drawing]

Figure 1 is a front view showing an example of a dust mask, Figure 2 is a front view showing an example of a dust mask.
The figure is a sectional view showing one embodiment of the filter storage device attached to the dust mask, FIG. 3 is a front view of the same embodiment, FIG. 4 is a sectional view showing another embodiment of the filter storage device, and FIG. The figure is a partially cutaway front view of the same embodiment. 1... Dust mask, 2... Filter storage container, 4
...Filter storage body, 6...Cap, 8...
...Intake port, 9...Dust collision surface, 10...Impactor, 12...Adhesive surface, 13...Filter, 14...
... Filter storage container, 16 ... Filter storage container main body, 17 ... Cap, 18 ... Cap, 19
...Dust impact surface, 20...Impactor, 21...
Adhesive surface, 22...filter.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a filter housing to be attached to a dust mask, an impactor is provided inside the outside air inlet to rapidly change the flow direction of the intake air, and an impactor is provided on the outside air inlet side of the filter housing. A dust mask filter storage device comprising an adhesive surface on both or one of the inner surface and the dust collision surface of the impactor. (2) The dust mask filter storage device according to claim 1 of the utility model registration claim, in which the impactor is detachably attached. (3) The dust mask filter storage device according to claim 1 or 2, wherein the impactor is molded from an adhesive material such as acrylic ester resin. (4) The dustproofing device according to any one of claims 1 to 3 of the utility model registration claim, which is obtained by pasting an adhesive seal or applying an adhesive to the inner surface of the outside air inlet side of the filter housing. Filter storage container for masks. (5) The dust mask filter storage device according to any one of claims 1 to 4 of the utility model registration claim, wherein the outside air intake port is formed in an annular shape. (6) The dust mask filter storage device according to any one of claims 1 to 5 of the utility model registration claim, wherein the outside air inlet has a horizontally elongated or vertically elongated hole.