JPH0412999Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a dust and gas mask with a blower used when working in a hazardous dust or gas environment.

Conventional technology Conventionally, in order to reduce the ventilation resistance of the filter,
Some devices have a filter, blower, and battery integrated into one, which is carried on the waist, and is connected to the facepiece through an air pipe. This type of product has the advantage of increasing overperformance, but because the main components are gathered in one place, the external shape is bulky and hinders work, and the weight increases, which puts a heavy burden on the lower back that supports it. There were drawbacks such as the air pipes getting wrapped around the body during work, which was bothersome. There is also a type that has a blower connected directly to the facepiece, but this type has drawbacks such as narrowing the field of view and being heavy, which can be a hindrance to work.

Summary of the invention In this invention, a motor accommodating part is provided in the center of the inner air passage in the male threaded part of the rear end of the blower unit casing that is screwed into the intake port of the face piece, thereby shortening the front and rear length of the blower unit casing as much as possible. In addition to reducing weight and expanding the field of view of the facepiece, the airflow passage narrowed by housing the motor accelerates airflow and improves motor cooling efficiency.
By making the motor smaller, lighter, and more durable, we also made the entire blower unit smaller and lighter to prevent air leakage from the mask face contact area and reduce the burden of mask adhesion. It has been done.

Embodiment of the invention This invention will be explained below with reference to the drawings as an example of its implementation. Reference numeral 1 denotes a blower unit, and a casing 2 made of synthetic resin is formed hollow so that the inside communicates with the front and rear ends. The rear end is screwed into the female threaded port 5 to which the absorption canister 4 equipped with the high-performance filter 3 is screwed, the male threaded portion 8 is screwed into the female threaded port 18 of the intake port 17 of the face piece 16, and the middle part is screwed into the female threaded port 5. Each of the fan housing chambers 6 is partitioned from the female threaded port 5 at the front end by a partition wall plate 10 that opens around an intake port 9 of a required diameter.
This fan accommodation chamber 6 accommodates a multi-blade fan 11 having a required number of vanes 11b erected at required intervals on a base portion 11a, and a motor 13 to which the multi-blade fan 11 is attached is connected to a rear end male The device is installed in the motor housing chamber 7 within the ventilation passage 12 formed by drawing the inside of the threaded portion 8, and the ventilation port 15 is opened at the rear end surface. The motor 13 is connected to a power cord 14
It is connected to an external power supply (not shown) and is supplied with power. As an external power source, a unit containing a rechargeable battery, dry cell batteries, DC converter, etc. is carried.

Effects of the invention This invention is configured as described above, and the face piece 16
Since the blower unit 1 is directly connected to the face piece 16, the clean air passed through the filter 3 installed on the front side is blown directly to the face piece 16. Since the motor 13 is installed in the motor housing chamber 7 configured in the ventilation passage 12 inside the male threaded portion 8 at the rear end, the front and rear length of the blower unit 1 can be shortened and the size can be reduced. Therefore, it is possible to improve the biggest drawback of the conventional mask with a blower, which is the narrow field of view, which impairs the basic performance of the mask.In addition, the air passage 12 in the casing is narrowed and the amount of air hitting the motor 13 is increased, improving cooling efficiency. This contributes to making the motor 13 smaller and lighter, as well as contributing to longer life. Furthermore, by shortening the front and rear length of the blower unit 1 and downsizing the motor 13, the overall weight of the blower unit 1 has been reduced, reducing the burden on the mask device on the worker and eliminating air leakage from the mask fitting. , the band can be tightened loosely, making work easier. It can also be used in a gas environment by replacing the absorption canister.

From the above, this devised dustproof and toxic mask with a blower consumes less power, ensures a good field of vision,
This is highly effective in allowing you to work comfortably without feeling the burden of the mask device.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is an external view, FIG. 2 is a vertical side view of the main parts, and FIG. 3 is an exploded sectional view. 1...Blower unit, 2...Casing,
3...High performance filter, 4...Absorption canister, 5...
Female screw port, 6...Fan accommodation chamber, 7...Motor accommodation chamber, 8...Male thread part, 9...Intake port, 10...
...Division wall plate, 11...Multi-blade fan, 11a...Base part, 11b...Blade plate, 12...Blower passage, 13
... Motor, 14 ... Cord, 15 ... Air outlet, 16 ... Facepiece, 17 ... Intake port, 18 ... Female screw port.

Claims (1)

[Scope of utility model registration request] This is a dust and gas mask with a blower that is connected directly to an absorption canister with a built-in filter, a blower unit, and a face piece, in which the blower unit includes a casing, a multi-blade fan built in the casing, and a facepiece. The casing has a front end formed into a female threaded opening that is screwed together with the absorption canister, and a suction opening of a required diameter in the center of the casing. A fan storage chamber is separated from the front end by a separator plate, and the rear end is formed into a male threaded part that screws into the air intake port of the facepiece, and the front and rear ends have a structure in which the front and rear ends are connected in a hollow manner as a whole. It is a thing,
The multi-blade fan consists of a fan base directly connected to the motor, and a required number of vanes erected on the fan base at a required interval, and the motor is connected to a male thread at the rear end of the casing. A dust/gas mask with a blower, characterized in that the blower is installed in a motor housing chamber that is formed in a ventilation passageway on the inside of the section and moved toward the rear along the centerline of the ventilation passageway.