JP2001087305A - Hume removing apparatus attached to shading surface for welding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive apparatus reducing the load of a worker and enabling free welding work in order to efficiently remove hume generated at a time of welding and simple in constitution. SOLUTION: All of a suction hose 14 protruded toward the vicinity of a welding place, the fan 12 with a motor connected to the rear end of the hose 14, for example, the discharge hose 18 provided on the discharge side of the fan and having a discharge port opened to the air formed to the opening end part 19 positioned above the face of a worker thereof, a feed means like a battery and a switch are supported by a shading surface l for welding equipped with a support means like a handle 4 and shading glass 3. Since the hume discharged upwardly from the opening end part 19 becoming the discharge port above the face of the worker is sucked by a dust collector having a canopy-shaped hood 26 provided above the working spot to be treated, the hume does not drift about the mouth of the worker from the welding place 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fume removing device integrally attached to a protective light-shielding surface (protective mask) used for welding work.

[0002]

2. Description of the Related Art In a welding operation such as electric welding or gas welding, a strong light beam or a spark is generated from a welded portion having a high temperature. A so-called "light-shielding surface" made of an opaque heat-resistant material has a shape so that it can cover your face and part of your head, or you can cover your face by putting it on your head. It has been widely used in the past. Since the worker needs to monitor the welding spot, this light-shielding surface is provided with a window fitted with translucent light-shielding glass that absorbs or reflects most of the light and protects the worker's eyes. The operator performs the welding operation while seeing the welding location through the light-shielding glass. In this way, the light-shielding surface can reliably shield harmful sparks and intense light rays and protect workers.

[0003] However, during the welding operation, not only sparks and intense light rays but also a mixture of harmful gases and fine particles called "fume" is generated. If fumes are inhaled into the human body by breathing, it may be harmful to the health.Therefore, when performing welding work outdoors with good ventilation, or when performing indoors, generally do not spread the fumes from the work site indoors. Connect a large canopy (hood) -shaped hood covering the top of the work site to a dust collector consisting of a suction-type blower, etc. connected to it, and use the canopy to remove air and fumes around the work site by the negative pressure generated by the blower. While collecting and sucking up, harmful gas components and fine particles contained in the fume are filtered and separated and removed,
Releases only purified air into the atmosphere. In some cases, a large amount of clean air is mixed with fumes to release almost detoxified air into the atmosphere.

[0004] Such a dust collector including a canopy-type hood and a stationary blower or the like forms a flow of air that rises upward from a work site by a suction force of a strong blower, thereby removing fumes rising from a welding location. Since the removal is carried by the flow of air, the average fume concentration in the air at the entire work site can be reduced to a level that does not cause any problem. It is difficult to sufficiently reduce the concentration of fume flowing from the welding point to the worker's mouth because
The possibility remains that workers will inhale fumes.

[0005] As a method for more reliably protecting a welding worker against this problem, there is a method using a so-called "push-pull type dust collector". In this method, clean air is blown out from the ceiling side of the indoor work site toward the floor surface to form a downward air flow, and air containing fumes is suctioned near the work site floor surface to the outside. A powerful, co-operating system that discharges air and detoxifies it, creating a top-to-bottom air flow in the work site space, both in the ceiling space and the floor space of the work site. Equipment must be large-scale due to the need to provide a ventilation system. Furthermore, since the dust collecting equipment provided under the floor is generally expensive, there is a problem that the equipment cost is extremely increased by this method.

Therefore, Japanese Patent Laid-Open Publication No. 11-4 / 1999 discloses a fume removing apparatus capable of efficiently removing fume by sucking out fume only from a space near a welding point.
No. 7184. This is an inner diameter of 20mm connected to the suction side of a fume collector (dust collector)
The front and rear flexible hoses are held by the worker themselves or attached to the light-shielding surface attached to the head, and the flexible hose is supported close to the welding point by protruding the tip of the flexible hose forward. Then, the fume is sucked into the dust collector from the vicinity of the welding point, thereby preventing the fume from flowing to the mouth of the worker and being sucked.

However, there are also problems with this improved prior art. That is, the proximal end of the flexible hose attached to the light-shielding surface so as to protrude from the light-shielding surface toward the vicinity of the welding point is connected to another flexible hose connected thereto or to itself. Is connected to a dust collector consisting of a separately provided large blower and its driving means, etc., by a flexible hose that is continuous as an extension of the light source. Then, the flexible hose connected to the dust collector is dragged and moved. In this case, if the connecting flexible hose is not long, the light shielding surface can be freely moved to perform the welding operation, so that the connecting flexible hose needs to have a very long length.

Therefore, the light-shielding surface, which is originally light and can be freely moved by the operator as the welding operation proceeds,
Dragging the long flexible hose for connection makes it heavy and inconvenient to handle, and the restraint on the hose limits the range of movement of the light-shielding surface, making it difficult to perform welding work. Not only cannot be used, but also the weight, tension, bending force, and the like of the hose impose a burden on an operator supporting the light-shielding surface, thereby increasing the operator's fatigue.

[0009]

SUMMARY OF THE INVENTION The present invention addresses the above-mentioned problems in the prior art, and reliably removes fumes generated from welding spots by relatively simple and inexpensive means. In addition to preventing the worker from inhaling the fume, there is no large weight, tension, bending force, etc. acting on the fume removing means at that time, so that they do not burden the operator. ,Also,
It is an object of the present invention to provide an improved apparatus for removing fume that can be attached to a light-shielding surface for welding without hindering a free welding operation.

[0010]

SUMMARY OF THE INVENTION In the fume removing apparatus of the present invention, a light shielding for welding is provided which has its own supporting means and a light shielding glass having the same structure as a light shielding surface which has been widely used in the past. Surface, the suction-side passage protruding from the front surface toward the vicinity of the welding point, the motor-equipped fan that connects the suction side to the rear end, and the discharge side of the motor-equipped fan more than the worker's face. The discharge port that opens upward and the power supply means such as a battery or a power supply line for the motor-equipped fan, and the switch means for intermittently supplying electric power and controlling the drive of the motor-equipped fan are all supported. It has a configuration. In this case, the discharge port can be formed as an end opening of a discharge-side passage connected to the discharge side of the motor-equipped fan. Further, it is desirable that at least one of the passage on the suction side and the passage on the discharge side is a flexible hose that can freely bend and expand and contract and maintain the deformed shape. Furthermore,
It is desirable that a heat-resistant filter such as a wire mesh is provided in the passage on the suction side of the motor-equipped fan.

[0011]

Since the fume removing device of the present invention has the above-described configuration, in the welding operation, the worker moves the light-shielding surface toward the welding point, so that the tip of the suction-side passage is automatically moved. Since it approaches a suitable place slightly above the welding point, it is driven by turning on the switch means to supply power to the motor-equipped fan, and the fume rising from the welding point is efficiently sucked from the tip of the suction side passage, and this passage and the motor While flowing through the fan, the face of the worker is bypassed, and fumes are discharged from the discharge port located above the face of the worker into the air above.

When a dust collector or the like having a canopy-type hood is provided at the upper part of the work site as is usually done, fumes are sucked into the hood and detoxified. Even when a dust collector having a canopy-type hood is not provided, as in the case of an outdoor workplace, the fumes rising from the welding location are high in temperature and light, so they are discharged upward from the discharge port and do not flow downward. There is no danger of drifting to the worker's mouth and being sucked.

When the passage on the suction side is a flexible hose which is free to bend and expand and contract and can maintain the deformed shape, the distal end of the passage on the suction side is easily welded. Positioning can be performed at an optimum position near the location. A discharge-side passage is connected to the discharge side of the motor-equipped fan, a discharge port is formed as an end opening thereof, and the discharge-side passage is a flexible hose, which is similarly bent. If the deformation and expansion and contraction are free and the deformed shape can be maintained, the discharge port on the downstream side of the discharge side passage is easily positioned at the optimum position and direction above the worker. Therefore, it is possible to reliably prevent the fumes discharged from the opening end from descending and being sucked into the worker, and when a dust collector having a canopy-type hood is provided, the discharge port is connected to the hood. Can be reliably directed in the direction of.

Further, if a heat-resistant filter is provided upstream of the motor-equipped fan, sparks generated at the welding location can be reliably prevented from being sucked into the motor-equipped fan and damaging the fan. Can be protected.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing a specific embodiment of the present invention, it is described in Japanese Unexamined Patent Publication No. 11-47184, which is one of the aforementioned prior arts directly targeted for improvement by the present invention. The described system will be described in detail with reference to FIG. Welding light-shielding surface 1 that the operator holds by hand (or attached to the head) and supports
Is made of a light-weight, heat-resistant opaque material like a normal light-shielding surface, and a light-shielding glass (lens) 3 is fitted into a window opened at the approximate center of the front surface 2, and as shown in FIG. If you have a handle (grip rod) 4 at the bottom as support means
Is attached. Side of front 2 (or top 5)
Has a proximal end 7 of a relatively short flexible hose 6 attached by a U-shaped fixture 8 so that the distal end 9 of the hose 6 is supported so as to protrude forward from the front surface 2. ing. A suction portion 10 that expands in a trumpet shape for collecting fume is attached to the distal end portion 9.

Although not shown in FIG. 4, a detachable joint is provided at the base end 7 of the flexible hose 6, and a flexible joint having an inner diameter of about 20 mm connected thereto is provided. A long hose 11 with a hole extends rearward (or sideward), and a distal end on the downstream side of the hose 11 is connected to an intake port of a fume collector (not shown) having a roots blower installed separately from the light shielding surface 1. ing. The flexible hose 6 and the long flexible hose 11 connected thereto can be configured as a series from the beginning without interposing a joint between them.

Since the conventional fume removing apparatus shown in FIG. 4 is configured as described above, when the operator moves the handle 4 of the light shielding surface 1 by hand during welding work,
The long flexible hose 11 will be dragged and moved with it. However, since the fume collector (not shown) connected to the downstream end of the long hose 11 does not normally move, the operator needs not only the weight of the light shielding surface 1 including the relatively short flexible hose 6 but also the Since the large weight of the long flexible hose 11 and the tension and bending force acting on the hose 11 are burdened at the same time, the worker cannot not only move the light shielding surface 1 freely and lightly, but also
Fatigue will increase.

To solve this problem, there is provided a fume removing apparatus according to the present invention. In the preferred embodiment of the present invention shown in FIGS. 1 to 3, a light-shielding glass 3 on a front surface 2 and a light-shielding glass 3 on a side portion of a light-shielding surface 1 having a handle 4 below the light-shielding glass 3 as in the prior art. A small, cylindrical motor-equipped fan 1 at a position where
2 is attached with a U-shaped fixture 13 and a screw or the like. Connected to the suction side of the fan 12 is a flexible light and short hose 14 that can freely expand, contract, and bend and maintain a deformed shape unless external force is applied. The front end 15 protruding forward from the front surface 2 of the vehicle has a suction portion 16 which expands as shown in FIG.
Is attached. In order to prevent the motor-equipped fan 12 from being damaged when a spark or the like is sucked from the welding point via the flexible hose 14 on the suction side, the fan 1
It is desirable to interpose a filter 17 made of a fine mesh or the like on the suction side 2 or the suction portion 16 of FIG.

In the illustrated embodiment, a short flexible hose 18 that can expand and contract and bend is attached generally upward to the discharge side of the motor-equipped fan 12. The length of the flexible hose 18 on the discharge side may be shorter than the flexible hose 14 on the suction side. The flexible hose 18 on the discharge side is
Since the downstream end portion 19 may be opened slightly in the air as a discharge port facing upward slightly above the upper surface 5 of the light-shielding surface 1, like the flexible hose 11 in the conventional example shown in FIG. There is no need to make it longer. Therefore, even when the flexible hose 18 on the discharge side is provided as in the illustrated embodiment, the weight can be reduced. The open end 19 of the flexible hose 18 on the discharge side is a free end that opens in the air above the light-shielding surface 1 and is not connected anywhere. Does not work at all.

Fan 12 with motor and flexible hose 1
The battery case 20 is provided at an appropriate position inside (or outside) the light-shielding surface 1 so as to balance the weight of the battery case 20 with the battery case 20.
Contains a battery 21 for driving a motor, such as a dry battery or a secondary battery that can be repeatedly charged and discharged. Also,
A switch 22 is attached to the handle 4 so that the switch 22 is naturally turned on when the operator grips the handle. Of course, it is needless to say that it may be a normal ON-OFF switch. The battery 21 and the motor of the fan 12 are electrically connected via a switch 22 by a conductive wire (not shown).

Since the embodiment of the fume removing apparatus of the present invention shown in FIGS. 1 to 3 is constructed as described above, the operator can use the hand 4 to hold the light-shielding surface 1 with one hand in the welding operation.
And turning on the switch 22, the motor-equipped fan 12 is driven. As a result, air is sucked from the expanding suction portion 16 provided at the distal end portion 15 of the flexible hose 14 on the suction side, and the flexible hose 1 on the discharge side is sucked.
8 and is discharged upward from an end opening (discharge port) 19 on the downstream side.

Therefore, as illustrated in FIG.
Adjust the shape of the flexible hose 14 on the suction side, which protrudes forward from the head, and adjust the shape of the welding rod (or welding torch) held in the hand.
When the suction part 16 of the flexible hose 14 on the suction side is located at a position of about 50 to 100 mm above the welding part 24 at the tip of 23, fume generated from the welding part 24 is efficiently sucked into the suction part 16, It flows through the inside of the discharge side flexible hose 18 so as to bypass the light-shielding surface 1 and the worker's face inside the light-shielding surface 1 without diffusing to the periphery of the welded portion 24, and rises above the worker's face. It is discharged upward from the open end 19 of the flexible hose 18 on a certain discharge side. Since the hot fume is light and rises as it is, the danger of the operator inhaling the fume is reliably avoided. As a result of positioning the suction part 16 of the suction side hose 14 near the welding point 24, the motor-equipped fan 12
However, since fumes are efficiently removed, the motor-equipped fan 12 and the battery 21 can be made small and lightweight.

In the illustrated embodiment, a motor-equipped fan 12 is mounted on one side of the light-shielding surface 1 and a discharge-side flexible hose 18 is connected downstream thereof.
The opening end 19 serves as a discharge port to the air, but as another embodiment of the present invention not shown, the position of the motor-equipped fan 12 is set higher than in the example shown in FIG.
The discharge port of the motor-equipped fan 12 may be directly opened upward in the air while the flexible hose 18 on the discharge side is omitted while being attached to the upper surface 5 of the device. Thereby, the entire configuration can be further simplified.

Although not an essential component of the present invention, as shown in FIG. 5, a canopy-type hood 26 and a suction-type electric blower 27 connected thereto are provided above a normal indoor work site 25. And that's duct 2
8 and is connected to a dust collector (not shown) through which the electric blower 27 is operated to constantly suck up the air at the work site 25, so that the opening of the flexible hose 18 on the discharge side attached to the light shielding surface 1 is opened. By directing the end 19 in that direction at the lower part of the hood 26, the fumes discharged from the open end 19 rise and are surely sucked into the hood 26. Therefore, fumes do not diffuse into the air at the work site 25 and drift.

In the illustrated embodiment, the battery 21 is mounted on the battery case 20 on the light-shielding surface 1 and the motor-driven fan 12 is driven by the battery 21. However, the battery 21 is driven by an external power supply instead of the battery 21. Is also good. This saves the time of replacing or charging the battery 21,
The motorized fan 12 can be relatively powerful. However, in this case, a long power cord (not shown) is pulled out from the light shielding surface 1. The power cord may be thin, light and flexibly bent, and may be a flexible long hose 11 in the conventional example shown in FIG. Since the power cord is heavy and heavy and does not generate a large tension or bending force, there is no danger that the power cord will burden the operator, hinder the movement of the light shielding surface 1 and hinder the free welding operation.

[0026]

According to the present invention, fumes generated from a welded portion are reliably removed by a simple and inexpensive removal device attached to a light-shielding surface to completely prevent a worker from inhaling the fumes. Can be. In addition, since a large weight, tension, bending force, and the like are not generated by the fume removing device and burden on the operator, welding work can be freely performed even on a large-sized one. Thereby, there is no need to provide expensive equipment such as a push-pull type dust collector.

[Brief description of the drawings]

FIG. 1 is a front view illustrating an embodiment of a fume removing apparatus of the present invention.

FIG. 2 is a plan view of the device shown in FIG.

FIG. 3 is a side view of the device shown in FIG. 1;

FIG. 4 is a perspective view showing a conventional example.

FIG. 5 is a side view showing an embodiment of the present invention including the apparatus of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Light-shielding surface 3 ... Light-shielding glass 4 ... Handle 6 ... Flexible hose 11 ... Long flexible hose 12 ... Fan with motor 14 ... Flexible hose on suction side 16 ... Expanding suction part 17 ... Filter 18: Flexible hose on the discharge side 19: Open end on the downstream side (discharge port) 21: Battery 22: Switch 24: Welding point 26: Canopy-shaped hood 27: Electric blower

Claims (5)

[Claims] 1. A light-shielding surface which is made of a heat-resistant opaque material and has a shape covering at least the face of a welding worker, and has a light-shielding glass on its own support means and a front surface, and a welding portion from the light-shielding surface. A suction-side passage supported by the light-shielding surface so as to protrude toward the vicinity of the motor; a motor-equipped fan connected downstream of the suction-side passage and supported by the light-shielding surface; A discharge port that opens the discharge side of the fan with a fan upward above the face of the worker, power supply means connected to the fan with a motor, and switch means for controlling the drive of the fan with a motor. A fume removing device attached to a light-shielding surface for welding, comprising: 2. The suction-side passage according to claim 1, wherein the suction-side passage is formed of a flexible hose that can be freely bent and maintain its shape so that the end can be freely positioned. Fume removal equipment. 3. The discharge port according to claim 1, wherein the discharge port is formed as an open end of a discharge-side passage connected to the discharge side of the motor-equipped fan and supported by the light-shielding surface. A fume removing device characterized by the above-mentioned. 4. The discharge passage according to claim 3, wherein the discharge-side passage is formed of a flexible hose that can be freely bent and maintain its shape to freely position the open end. Fume removal device characterized. 5. The method according to claim 1, wherein
A fume removing apparatus, wherein a heat-resistant filter is provided upstream of the motor-equipped fan.