JPH0418584Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a filter storage device that is attached to dust masks, gas masks, etc. worn by workers at various work sites where a lot of dust is generated. It is.

[Conventional technology]

Conventionally, this kind of filter storage device has a filter 35 in a container body 34 which has an intake port 32 and a ventilation hole 33 communicating with the inside of the mask facepiece, as shown in the first diagram.
It is often used to store things.

In addition, the national standards for dust masks stipulate that a structural requirement is that the mask wearer himself/herself be able to easily inspect the adhesion between his/her face and the mask facepiece at any time.

[Problems that the idea solves]

In the conventional dust mask filter storage container mentioned above,
Since all the dust 36 contained in the sucked air is collected by the filter 35, there is a drawback that the service life of the filter is short.

As a device for solving this drawback, there is a device described in Japanese Utility Model Publication No. 2-46914.

This idea is based on the principle of inertial collision, i.e., if a collision plate, so-called impactor, which rapidly changes the flow of air intake is installed immediately after the outside air intake, the proportion of dust collected by this impactor will be reduced by the amount that passes through the outside air intake. The relatively coarse particles contained in the intake air are The service life of the filter is extended by collecting the dust on the inner surface of the filter housing on the outside air intake side or on the adhesive surface provided on the dust collision surface of the impactor before it reaches the filter.

When carrying out the above-mentioned inspection on the dust mask equipped with the filter housing according to the above invention, for example, one of the filter housings 2 and 3 installed on both the left and right sides of the mask face piece 1 as shown in the second figure. A special rubber cap 5 is fitted into the circular or annular outside air intake port 4 provided in the filter storage container 2 of the filter storage device 2, and a dedicated rubber pipe 7 is fitted into the circular or annular outside air intake port 6 provided in the other filter storage device 3. , the mask wearer 8 breathes while temporarily blocking the tip of the dedicated rubber pipe 7 with his or her thumb, and examines whether exhaled or inhaled air leaks from between the face of the mask wearer 8 and the mask facepiece;
A method similar to the conventional method for inspecting the adhesion of the mask face piece 1 must be adopted.

However, in this testing method, the mask wearer must always carry a dedicated rubber cap 5 and rubber pipe 7, but it is often the case that the mask wearer forgets to carry the mask or loses it. Also, when trying to fit the rubber cap 5 and rubber pipe 7 while wearing the mask face piece 1, the outside air inlets 4 and 6 of each filter storage container 2 and 3
There are various drawbacks, such as not being able to see it or being difficult to see it, so you have to try to fit it by hand, making it difficult to fit it.

Although these drawbacks can be overcome by wearing a mask as described in Japanese Patent Application Laid-Open No. 75568/1983, this mask has the following drawbacks.

That is, after the outside air passes through the filter layer, it is sucked into the mask facepiece through the suction pipe, so the dust contained in the outside air, from fine particles to relatively coarse particles, slips and is captured by the filter layer. As a result, the service life of the filter medium is shortened accordingly, the amount of filter medium consumed increases, and the effort required to replace the filter medium increases.

This invention utilizes an impactor that rapidly changes the flow direction of intake air inside the outside air intake port of the filter housing, and uses the principle of inertial collision to remove relatively coarse dust contained in the intake air. In the filter storage for dust masks, the dust can be collected on the impactor surface and the inner surface of the storage container before reaching the limit, thereby extending the service life of the filter.
It is an object of the present invention to provide a filter storage device for a dust mask that allows a mask wearer to easily inspect the adhesion of a mask face piece whenever necessary.

[Means to solve the problem]

In order to achieve the above object, the present invention provides an outside air inlet in the front part of the body that is attached to the mask facepiece of a dust mask, and an outside air inlet in the bottom part of the body that communicates with the inside of the mask facepiece. Provide ventilation holes,
In the filter housing which houses the filter, a sliding rod that slides in and out of the container is inserted into the front part of the container near the bottom of the container, and the sliding rod is inserted into the container. The insertion end is provided with an impactor that abruptly changes the flow direction of the intake air from the outside air intake port in front of the filter, and that moves the outside air intake port between a closed position and an open position. It is characterized by being configured by being fixed.

Embodiments of the present invention will be described below based on FIGS. 3 to 8 of the drawings. Reference numeral 9 denotes a mask facepiece of a dust mask, 10 denotes an exhaust hole attached to the lower side of the mask facepiece 9, and 11 and 12 denote the mask facepiece 9. Filter storage units installed on both the left and right sides of the mask, 13 is the mask wearer 14
is a rubber cord used when wearing the mask facepiece 9.

The filter storage containers 11 and 12 have a case body 15 having a ventilation hole communicating with the inside of the mask face piece 9 at the bottom, a filter 16 provided near the bottom inside the case body 15, and a filter 16 that is screwed into the inner wall of the case body 15. It is a case lid with two long and short sections on the front part.
A case lid body 18 has an outside air intake port group 17 formed by a plurality of small intake ports each having a plurality of elongated holes arranged in a radial direction. An impactor 19 that rapidly changes the flow direction in front of the filter 16 is slidably inserted into the through hole 20 provided in the center of the front part of the case lid 18 and inserted into the case body 15. A sliding rod 21 whose end is fixed to the center of the impactor 19, and an end of the sliding rod 21 that protrudes outside the case lid 18,
When the impactor 19 moves to the position where the outside air intake port group 17 is opened, the impactor knob 22 that is received by the outer edge of the through hole 20 and the sliding rod 2
1, which are provided on both sides close to the impactor knob 22, and when the impactor 19 moves to the position where the outside air intake port group 17 is closed, the air passes through the notches 23 and 24 cut from both sides of the through hole 20. Then, the impactor knob 22 is used to move the sliding rod 2.
When turning 1, projections 25 and 26 engage with the outer edge of the through hole 20 to lock the impactor 19, and are interposed between the impactor 19 and the case lid 18.
It also includes a spring 27 that constantly urges the impactor 19 to a position where it opens the outside air intake port group 17.

In order to improve the airtightness between the case lid 18 and the impactor 19, a raised portion 28 is provided on the periphery of the impactor 19, and a raised portion 28 is provided on the portion of the case lid 18 that faces the raised portion 28. A recessed portion 29 is provided in which the holder is fitted.

The surface of the impactor 19 and the filter housing 11,
An adhesive surface may be provided on both or one of the inner surfaces on the side of the 12 outside air intake port groups 17 to further enhance the dust collection effect.

Next, to explain how to use the dust mask filter housing constructed as described above, normally, as shown in the fourth figure, the impactor 19 is opened by the elasticity of the spring 27, and the outside air inlet group 17 is opened. When the group 17 and the impactor 19 are moved to a position where the required distance is secured, and dust-containing air 30 is sucked through the outside air intake port group 17 as shown in FIG. Due to the principle of inertial collision between the outside air intake port group 17 and the impactor 19, coarse dust 31 is collected on the surface of the impactor 19 and the inner surfaces of the containers 11 and 12 before reaching the filter 16. On the surface, the air is collected while being deposited in a pattern corresponding to each intake port of the outside air intake port group 17, as shown in FIG. 8, thereby extending the service life of the filter 16.

In addition, when inspecting the adhesion of the mask face piece 9,
The mask wearer 14 himself/herself grasps the impactor knob 22, rotates the sliding rod 21 to a position where the protrusions 25, 26 face the notches 23, 24, and then pulls it out against the elasticity of the spring 27. Subsequently, the protrusions 25 and 26 are rotated so as to be displaced from the cut holes 23 and 24 and engaged with the outer edge of the through hole 20. Then, the impactor 19 is locked in a position that closes the outside air intake port group 17, as shown in FIG. When the mask wearer 14 breathes in this state,
The adhesion of the mask facepiece 9 can be inspected.

After the inspection is completed, if the sliding rod 21 is rotated by the impactor knob 22 to a position where the protrusions 25 and 26 face the cut holes 23 and 24, the elasticity of the spring 27 acts to return the sliding rod 21 to its original position. , the outside air intake port group 17 is opened, and the mask can be used as a dust mask.

The present invention is not limited to the above-described embodiments, and the design may be modified as appropriate, such as by changing the impactor moving mechanism to various structures, or changing the shape and number of individual intake ports in the outside air intake port group. . The present invention may also be configured as a filter storage container for gas masks, dust-proof and gas masks, etc.

[Effect of idea]

Since the present invention is configured as described above, the impactor provided in the filter housing can be used to open and close the outside air intake port group, and this impactor can be operated so as to close the outside air intake port group. This makes it possible to inspect the adhesion of the mask facepiece, eliminating the inconvenience of carrying a dedicated rubber cap and rubber pipe for inspection as in the past, and opening/closing the outside air inlet group using a sliding rod. Since this can be easily done by sliding, the mask wearer can easily inspect the adhesion between the face and the mask face piece at any time while wearing the mask. Moreover, by using the principle of inertial collision using an impactor that rapidly changes the flow direction of intake air inside the outside air intake port of the filter housing, relatively coarse dust contained in the intake air is collected before it reaches the filter. However, it is possible to provide a filter storage container for a dust mask, which has the advantage of extending the service life of the filter, thereby reducing the consumption amount of the filter, and reducing the time and effort required to replace the filter. can.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional dust mask filter storage device, Figure 2 is a diagram showing a conventional example of adhesion inspection of dust masks, and Figures 3 to 8 are diagrams showing an embodiment of the present invention. Figure 3 shows the state in which the adhesion of the dust mask is being inspected, Figure 4 is a cross-sectional view of the filter housing, and Figure 5 shows the outside air inlet group of the filter housing being closed by the impactor. Figure 6 is a plan view of the filter housing with a part cut away, and Figure 7 is a diagram showing the state in which dust-containing air is sucked into the dust mask filter housing through the outside air intake port group. FIG. 8 is a diagram showing a state in which dust particles are collected on the surface of the impactor. 9...Mask face piece, 11, 12... Filter housing, 17... Outside air intake port group, 19... Impactor, 20... Sliding rod.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The front part of the body attached to the mask facepiece of a dust mask is provided with an outside air intake port, and the bottom of the case is provided with a ventilation hole that communicates with the inside of the mask facepiece. A filter storage device is provided near the bottom of the container body and stores a filter therein.
A sliding rod that slides in and out of the container body is inserted into the front part of the container body, and the insertion end of this sliding rod into the container body is connected so that the flow direction of the intake air from the outside air intake port is in front of the filter. A filter storage device for a dust mask, comprising a fixed impactor that moves the external air intake port between a closed position and an open position, the impactor being configured to rapidly change the direction of the outside air intake port. (2) The filter for a dust mask according to claim 1 of the utility model registration claim, wherein a spring is interposed between the filter housing and the impactor to constantly bias the impactor to a position where it opens the outside air intake port. storage container. (3) A notch hole is provided in the through hole through which the sliding rod is inserted into the filter housing, and when the impactor moves to the position where the outside air intake port is closed, the above-mentioned notch hole is provided in the sliding rod. Utility model registration claims 1 or 2, wherein a protrusion is provided that engages with the outer edge of the through hole and locks the impactor when the sliding rod is rotated after passing through the hole and moving through the hole. Filter storage container for the dust mask listed. (4) A raised part is provided on the periphery of the impactor,
Any one of claims 1 to 3 of claims 1 to 3, wherein a part of the body of the filter storage container that faces the raised part is provided with a recess into which the raised part is fitted. Filter storage container for the dust mask listed. (5) The dustproofing according to any one of claims 1 to 4 of the utility model registration claim, wherein an adhesive surface is provided on both or one of the surface of the impactor and the inner surface of the group of outside air intake ports of the filter housing. Filter storage container for masks.