JPH0620544Y2 - Dust mask filter- - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a filter of a dust mask worn in dusts or when spraying chemicals.

[Prior art]

The filter of the dust mask conventionally used has a relatively thin filter box having a small-diameter air inlet and an air outlet on the front surface and the back surface, respectively, and is provided between the air inlet and the air outlet. The one provided with a plate-shaped filter element is often used.

[Problems to be solved by the invention]

Since the conventional filter box described above has a small air intake and air outlet, the intake amount of air is limited and the person who wears the dust mask often fails to wear it because the air cannot be sufficiently ingested. When the user wears the above and performs the above-mentioned work in a dusty place or the work of spraying chemicals, only the vicinity of the air intake of the filter element becomes clogged in a short time due to the above-mentioned floating dust and chemicals, and cannot be used. Particularly when the solution is sprayed, the solution permeates the filter element and reaches the air outlet of the filter box to lose the function of the dustproof mask.

Therefore, these conventional dust masks are uneconomical in that many filter elements are prepared for use, and they are replaced every time they become soiled, and the cost of the filter elements, which are handled many times, is bulky. Since a large filter box is localized, it obstructs the field of view of workers and often wears a mask while working, although a mask is required.

[Means for solving problems]

The present invention was devised to solve the above-mentioned problems, that is, a space (1
Clearance on the outer circumference of the filtration bag (1) having a _1), mantle (2) filtration bag inlet air downwardly open (2 ₁₎ and filtration bag to (1) and (1)
In the filter body (3) covered with the filter bag (1) so as to have (6), the space (1 ₁ ) of the filter body (3) communicates with the outside of the filter body (3), and the dust mask (5) Install a ventilation pipe (4) that connects to the intake of the filter
It is provided in (3).

[Action]

When the filter of the present invention is installed on a dustproof mask and worn by an operator, the filter is vertically long and the uppermost part thereof is connected to the mask, which does not obstruct the view and does not hinder the work.

Since this filter is a hollow filter bag (1), its surface area is extremely large and the intake of air is extremely large, which facilitates breathing during work.

Further, since this filter can be freely deformed, the filter body (3) is freely deformed even if it takes an unreasonable posture during the work, which does not hinder the work of the operator.

When a person wearing a dust mask with the filter body (3) inside the atomized body of dust or chemicals works, the intake air is taken from the air intake (2 ₁ ) below the filter body (3). Filter bag with intake of
Air passes through the gap (6) between the (1) and the outer jacket (2) and spreads over the entire inner surface of the outer jacket (2), where the air passes from the outside to the inside of the filter bag (1) to collect dust or dust. Only the clean air from which the fine particles of the chemical solution are separated reaches the worker from the inside of the filter bag (1) through the ventilation pipe (4).

As described above, since the surface area of the filter bag (1) of the present invention is much larger than that of the conventional filter, the filtration amount of air becomes large and the worker can easily breathe.

The filter bag (1) is located inside the filter body (3) and is located at the lower inlet (2 ₁ ).
Fine particles of dust are sucked in as air is sucked in from the gap
It goes through the (6) and reaches the entire surface of the filter bag (1),
This distribution is dense near the air inlet (2 ₁ ) of the filter bag (1) and rough inside the filter body (3), and the filter bag (1) has an air inlet (2
₁ ) Since the clogging gradually progresses from the vicinity to the inner depth, the filter bag (1) has a long life which requires a considerably long time before it becomes unusable.

Since the outer jacket (2) is wrapped around the filter bag (1), even if fine dust in the air comes into contact with the outer jacket (2), it does not penetrate the outer jacket (2) and the peripheral surface slides down and falls downward. Prevents unnecessary contamination of the filter bag (1).

The filter bag (1) maintains its hollow shape without changing its body shape even when adhering dust, especially liquid, so that it does not cause a drastic decrease in its filtering ability and maintains its filtering ability.

Since the ventilation pipe (4) connected to the mask (5) is far away from the air intake (2 ₁ ) of the filter body (3), the air passing through the ventilation pipe (4) is a sufficiently filtered clean air. is there.

〔Example〕

 An embodiment of the present invention will be described with reference to the accompanying drawings.

(1) is 3 mm thick and 250 mm wide,
A hollow vertical filter bag made by stacking two filter cloths with a width of 150 mm and joining the peripheral parts. The filter bag (1) is provided with a support frame (1 ₂ ) provided inside it to create a space ( 1 ₁₎ in which filtration bag (1) inflated to a hollow by was allowed Yes. The filter bag (1) is not limited to the embodiment, but the size, shape, material, configuration, etc. can be freely selected.

In addition to the embodiment in which the filter bag (1) is inflated in a hollow shape to have a space (1 ₁ ) in the bag, a support frame (1 ₂ ) may be incorporated in the filter material, and the filter material itself is deformed. Even if it is difficult to do, the point is that the filter bag (1) is deformed and the space inside the bag (1 ₁ )
It is sufficient if the volume of the above does not decrease.

In this regard, in this embodiment, since the filter bag (1) is supported from the inside of the bag by the support frame (1 ₂ ), strong support is possible and the filter bag (1) does not reduce the volume even if a large amount of air is sucked. (2) is a piece of cloth such as polyethylene film that can block foreign matter, and is a bag-shaped mantle with an opening in the lower part, and the filter bag (1) is placed from the outside of the filter bag (1) to cover the filter bag (1). It is wrapped.

The mantle (2) is not limited to the above embodiment,
The material may be a plastic film or sheet other than polyethylene, as long as it can block foreign substances such as dust particles.

(7) is located between the filter bag (1) and the jacket (2) that encloses the filter bag (1), and there is always a gap (2) between the filter bag (1) and the jacket (2) so that the filter bag (1) and the jacket (2) do not contact each other and deteriorate the air flow. 6) is a plastic separating member provided between the filter bag (1) and the outer jacket (2) so that the separating member (7) is a basket in the embodiment. Not limited to a filter bag (1) and cloak (2)
The present invention is not limited to the embodiment as long as a gap (6) through which air can flow can be provided.

The filter bag (1) containing the support frame (1 ₂ ) is covered with the isolation member (7), and the outer cover (2) is further covered thereover to form the lower opening as the air intake (2 ₁ ). obtained by constituting the filter body (3), the ventilation tube made of plastic in the upper part of the filter body (3) to the intake air inlet (2 ₁₎ from the best distant position or filter body (3) and (4) It is provided so as to project from the inside of the filter bag (1) toward the outside of the jacket (2) so that the air in the filter bag (1) is sucked to the outside of the filter body (3).

The ventilation pipe (4) is detachably connected to the intake of the dust mask (5).

[Effect of device]

As described above, the present invention has a large capacity for purifying the air to be sucked in as a filter bag (1) with a large surface area, so that it has a very large capacity for cleaning polluted air. It is possible to sufficiently supply clean air to the worker, and the air can be purified surely to obtain extremely clean air.

Furthermore, since the above filter bag (1) is covered with the outer jacket (2) and the lower part is the filter body (3) with the air intake (2 ₁ ),
Dust that adheres to the filter bag when it is not covered with the jacket (2) is covered with the jacket (2) .The jacket (2) prevents the dust from adhering and prevents the filter bag (1) from becoming dirty. Reduce and extend life.

It is especially effective for spraying chemicals in agricultural work, and when the mist of the chemicals in the air adheres to the outer cover (2) of the filter body (3), the fine particles of the chemicals that make up the mist gather and become large particles (2). It does not flow down and do not contaminate the filter bag (1).

Then, the contamination of the filter bag (1) of the filter body (3) starts from the portion near the air intake (2 ₁ ) and the filter bag (1) becomes clogged with the filter bag (1).
The air suction part of (1) gradually moves to the upper part of the filter bag (1) and finally the whole surface of the filter bag (1) becomes clogged and unusable. Since it can be replaced by a new one, this life is extremely long, and the embodiment can be used for about 8.2 times longer than the conventional one. Therefore, when performing control work in a wide field or forest, it is possible to save the labor of replacing the filtration element as in the conventional case, and the worker can concentrate on spraying the chemicals with confidence.

In addition, since the filter bag (1) has a large air intake area, even if the filtration capacity is increased to slightly reduce the flow of air, the air can be sufficiently sucked in and there is no problem in the breathing of the wearer, and clean air with little pollution is sufficient. It is a device that has the feature of being able to supply a large amount.

[Brief description of drawings]

Drawing is a figure showing an example of the present invention, Fig. 1 is a partially cutaway front view, Fig. 2 is a bottom view, Fig. 3 is a sectional view taken along the line II-II, and Fig. 4 is a schematic view of the present invention. [Fig. 3] is a diagram in which the filter body of the present invention is installed in a dust mask. 1: Filtration bag, _{1 1:} space, _{1 2:} Support 2: jacket, _{2 1:} an air inlet 3: filter body, 4: vent pipe 5: dust mask, 6: Clearance, 7: isolating member

Claims (7)

[Scope of utility model registration request] _1. A filter bag (1) having a space (1 ₁ ) inflated in a hollow shape and having a space (1 ₁ ) having a large internal volume, which is open at the lower side to serve as an air intake (2 ₁ ) ) Cloak (2) above the filter bag
(1) and the filter body (3) having a gap (6) so as to cover the filter bag (1), the space (1 ₁ ) of the filter body (3) communicates with the outside of the filter body (3), A filter for a dust mask, characterized in that a ventilation pipe (4) is provided in the filter body (3) so as to be connected to the intake of the dust mask (5). 2. The filter for a dust mask according to claim 1, wherein the filter bag (1) is freely deformable. 3. A utility model registration request, characterized in that the filter bag (1) is configured to support a space (1 ₁ ) in the filter bag (1) by being supported by a support frame (1 ₂ ). The filter for a dust mask according to item 1 above. 4. The utility model registration claim 1 characterized in that the gap (6) is provided with a separating member (7) between the filter bag (1) and the jacket (2). Filter for the dust mask described. 5. The filter for a dust mask according to claim 1, wherein the mantle (2) is capable of blocking dust and the like. 6. A utility model registration claim characterized in that the ventilation pipe (4) is fixed at a position as far as possible from the air intake (2 ₁ ) of the filter body (3). The filter for a dust mask according to item 1. 7. The filter for a dust mask according to claim 1, wherein the filter bag (1) is vertically long.