JP3235516U - Small amount of water dust scattering prevention device using the exhaust of the air breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small amount of water dust scattering prevention device using an exhaust of an air breaker, which prevents dust scattering without impairing workability during a chipping work by an air breaker. SOLUTION: A cylinder cover 2a equipped with a water injection port 2b is attached around an exhaust hole 1f of an air breaker, and fog is generated in the cylinder in conjunction with a striking operation, and at the same time, it is opened only in one direction by the exhaust pressure. Workability is improved by spraying mist around the chisel from the spray port 2d at the tip of the cylinder to form an air curtain C containing mist M, and appropriately moistening the fishing object and crushed pieces with a small amount of water W. Prevents dust from scattering without damaging it. [Selection diagram] Fig. 3

Description

The present invention relates to measures to prevent dust scattering during fishing work such as concrete, mortar, bricks, rocks, etc., which are carried out by using a handheld air breaker in the construction industry, demolition industry, and other industries.

Two typical measures to prevent dust scattering in chipping work are a dry measure that forcibly collects suspended particles with a dust collector and a wet measure that uses water to moisten the dust and prevent it from scattering.
In the case of dry measures, the structure of pneumatic tools including air breakers requires that compressed air, which is the power source, be discharged from the aircraft at the same time as it is activated, and this exhaust disturbs the atmosphere and diffuses suspended particles over a wider area. Therefore, it is difficult to use the dry type as an effective dust prevention measure only for air type tools.
Therefore, in general, wet measures have been established in which a watering specialist is assigned and the watering nozzle of the water hose is used to sprinkle water on the chisel of the air breaker operated by the fishing worker to suppress dust.

Japanese Unexamined Patent Publication No. 7-164352 Jitsuzensho 60-165177 Jitsuzensho 61-075983 Gazette

In the conventional wet dust scattering prevention measures by watering, labor costs that are not originally necessary such as a watering specialist are incurred, and all the dust constantly emitted from the tip of the chisel of the air breaker at the time of crushing is linearly injected by the watering nozzle. Or it was difficult to completely capture with a group of coarse water droplets.
In addition, there is a problem of poor workability, such as the wasteful injection of a large amount of water, which causes the surface to be hung to be submerged and the recovery of debris covered with sludge becomes difficult.
In order to solve these problems, various ideas have been made in the prior art, but all of them have shapes and functions that do not meet the purpose of the present invention, "preventing the scattering of dust without impairing the original workability of the air breaker". Met.
For example, as in Patent Document 1 and Patent Document 2, if the tip of the chisel is covered, dust can be suppressed, but the chipping worker cannot see the tip of the chisel, and workability is sacrificed. There is.
Further, Patent Document 3 is close to ideal in that the tip of the chisel can be visually recognized, but a new branch air pipe is provided and a plurality of protrusion parts such as a spray gun nozzle are provided in the spraying portion, which increases the weight of the main body and the protrusion parts. Workers' exhaustion due to annoyance is easy to imagine, and the original workability is sacrificed in that it cannot be easily attached and detached.
When considering it as a device to be attached to a vibrating tool used in the harsh work environment of chipping work, it is required to develop a more realistic and convenient device, and the number of parts and protrusions are required from the viewpoint of workability and durability. Keeping it to a minimum was an important issue.

By installing a cylinder cover with a water injection hose attached around the exhaust hole of the air breaker, fog is generated in the cylinder as it operates, and fog is discharged from the tip of the cylinder opened only in one direction by the exhaust pressure of the operation. By spraying around the chisel, a small amount of water will moderately moisten the object to be suspended and debris, and a small amount of water using the exhaust of the air breaker, which is characterized by preventing the scattering of dust without impairing workability. We devised a dust scattering prevention device.
The present invention does not require a new air pipe or mist blowing nozzle, it uses exhaust to generate mist and sprays mist in conjunction with the striking operation, which sets it apart from the prior art as the originality of the present invention. It is a point to draw.

The idea eliminates the need for a watering specialist, allows the fishing operator to easily see the tip of the chisel, and puts the body on the back of the device without protrusions, enabling the same work as when no measures are taken. As for the dust scattering prevention effect, the exhaust including the mist sprayed around the chisel acts as a conical air curtain, and while containing the dust, it is made into an appropriate moist state and dropped in the vicinity, and the amount of water is small. It does not become so submerged that the suspended surface is submerged, and it can be expected to have effects such as significantly improving workability compared to the conventional wet dust scattering prevention measures by watering.

It is a front view which shows the dust scattering prevention apparatus of one Embodiment of this invention. It is a left side view and the bottom view which shows the dust scattering prevention apparatus of one Embodiment of this invention. It is a figure which shows the mechanism and the operation state of the spraying of the apparatus cylinder part in this invention.

In the present invention, a cylindrical cover is attached so as to cover the exhaust hole and the body of the air breaker. The upper part of the cylindrical cover is tightened with a fixing band to make it airtight, and the lower part is left open as a spray port. A water injection port penetrating into the cylinder is provided on the side surface of the cylindrical cover and a portion corresponding to the exhaust hole position, and a water amount adjusting valve is provided at the tip of a hose connected to the water injection port. The water supply to these is directly connected to the water supply or pumped, and is of the natural drop type or negative pressure water absorption type, preferably fresh water, but the water injection port does not have a nozzle and has a particle size of about 0.5 mm. Since impurities are allowed, the supernatant water generated in the sludge treatment process can be reused. In winter and cold regions, warm water is used as a measure against freezing of the air breaker.
With the above configuration, a "small amount of water dust scattering prevention device using the exhaust of the air breaker (hereinafter referred to as the device)" is used, and when compressed air is sent to the air breaker equipped with the device and the device is in a standby state, the amount of water is adjusted by the water amount adjustment valve. Is adjusted so that an appropriate amount of water droplets are dropped into the device cylinder.
Along with the striking operation by the operation lever, the water droplets in the cylinder are agitated by the exhaust of compressed air to instantly generate mist, and the mist is sprayed around the chisel from the spray port opened around the tip of the cylinder by the exhaust pressure of the operation. Therefore, a conical, high-humidity air curtain is formed to contain the dust emitted from the tip of the chisel, and at the same time, the dust and debris are appropriately moistened and dropped to prevent the dust from scattering without impairing workability. Enables.

Hereinafter, an embodiment will be described with reference to the accompanying drawings. 1 is an air breaker. In this embodiment, any manufacturer can be used as long as it has a shape similar to that shown in the figure. However, there are three types commonly known as No. 30 (No. 35), No. 20, and No. 15, and since the diameter and length of the body are different for each, three types of standards are required for production.
Although there is a model with a different shape from the one shown in the figure, if it is an air type breaker with exhaust, it is the same as the operating principle of the present invention, and in that case, only the implementation shape is changed.
2 is the "small amount of water dust scattering prevention device (hereinafter referred to as the device) using the exhaust gas of the air breaker" of the present invention. Emphasis is placed on convenience, and the number of assembled parts is only one except for the fixture 3, and the cylindrical cover 2a is non-plastic and elastic, but it does not easily deform or even if it is temporarily deformed, it returns to its original shape. As a material, a water amount adjusting valve 2c is connected to the water injection port 2b on the side surface of the cylindrical cover 2a via a hose. Since the water injection port 2b itself does not need a spray function and does not have a nozzle, even if muddy water is used for the water W, there is little trouble of dust clogging like a fog nozzle.

For mounting, the device 2 is inserted from the lower part of the air breaker 1 , inserted to the extent that the horizontal heights of the exhaust hole 1f and the water injection port 2b are aligned, and the upper part is tightened with the fixture 3. In this embodiment, the fixture 3 uses bolts and nuts to tighten the metal fittings divided into semicircles, but depending on the material of the cylindrical cover 2a, a one-touch band can also be used, and in this case, no tool is required for mounting. Further, the chisel holder 1d is completely exposed, and the chisel 1c can be replaced while the device 2 is attached.

Hereinafter, the mechanism will be described with reference to FIG. 3 in addition to FIG. 1 and FIG. 2 of the attached drawings. Compressed air A is sent to the air pipe 1a of the air breaker 1 equipped with the device 2 to put it in a standby state, and the cap is opened while adjusting the amount of water W blocked by the water amount adjusting valve 2c, and the inside of the device 2 cylinder. To drip an appropriate amount of water droplet W.
When the blow by the operating lever 1b is started, the water droplet W in the cylinder is agitated by the exhaust E of the compressed air A to instantly generate the mist M, and the mist M is chiseled from the spray port 2d opened to the circumference of the cylinder tip by the exhaust pressure. By spraying around 1c, an air curtain C containing mist is formed in a conical shape to contain the dust emitted from the tip of the chisel 1c, and at the same time, the dust and debris are moistened to the extent that they do not float in the mist M and dropped. .. As a result, the fishing worker H can secure the same workability as when no measures are taken, and can prevent the scattering of dust without flooding.

1 Air breaker body 1a Air piping 1b Operation lever 1c Chisel 1d Chisel holder 1e Handle 1f Exhaust hole
2 Small amount of water using the exhaust of the air breaker Dust scattering prevention device main body 2a Cylindrical cover 2b Water injection port 2c Water amount adjustment valve 2d Spray port 3 Fixture A Compressed air W Water (including water droplets)
E Exhaust M Fog C Air curtain containing fog H is a fishing worker

Claims (1)

A cylinder cover equipped with a water injection port is attached around the exhaust hole of the air breaker, and fog is generated in the cylinder in conjunction with the striking operation, and at the same time, fog is discharged from the tip of the cylinder opened only in one direction by the exhaust pressure. An air curtain containing spray mist is formed around the chisel, and a small amount of water is used to moderately moisten the object to be suspended and debris, thereby preventing dust from scattering without impairing workability. A small amount of water dust scattering prevention device that uses the exhaust of an air breaker.

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