JP3772678B2 - Method of preventing fume leakage in sealed chamber using hoist device - Google Patents

Description

[0001]
[Industrial application fields]
In the present invention, when carrying a load in a sealed room provided in a building, a wire suspended from a hoist device attached to the outside of the sealed room and a narrow gap in the ceiling of the sealed room through which the hook passes are leaked to the outside. A method for reducing fume is provided.
[0002]
Conventionally, when performing hot dip galvanizing, etc., fume (white) is used in the alkaline aqueous solution used in the degreasing process and the hydrochloric acid and sulfuric acid aqueous solutions used in the pickling process, and in the water washing, galvanizing process and cooling process performed after each process. Including smoke and water vapor). Since these fumes lead to air pollution, the entire space used for the hot dip galvanizing process is covered with a sealed room (sealed room) so that it does not leak to the outside. This is done using a hoist attached to the ceiling. However, the hoist has a high rate of corrosion and deterioration due to the fumes remaining in the sealed chamber, and the hoist has to be replaced in a short period of time.
[0003]
As one means for solving this problem, a clearance is provided in the ceiling of the sealed room, the hoist is installed on the ceiling of the building that covers the sealed room, and wires and hooks hanging from the hoist are connected to the sealed room from the elongated gap provided in the ceiling of the sealed room. The method used for moving between each processing step is used. However, in the conventional hoist structure, in order to improve the operability of the wires and hooks, the wire ends of the two wires hanging from the hoist are arranged across a wide range of drums for winding the wires. In this state, as shown in FIG. 1, regardless of the direction of travel of the hoist, the working range of the wire is widened, and the width of the gap provided in the ceiling of the sealed chamber is also widened. Then, it becomes difficult to fill the gap with a seal or the like. Therefore, there is a problem that the amount of fumes that pass through the gap is large, the fumes come into contact with the hoist disposed at the upper portion of the gap, and the hoist is easily corroded.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of such problems of the prior art, and transports heavy objects in a sealed chamber through wires and hooks that hang from a hoist device into a gap provided in the ceiling of the sealed chamber. In such a case, a method for reducing fumes leaking from a gap provided in the ceiling of the sealed chamber is provided.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a loop formed by a wire hanging from a hoist device and a wire winding drum are arranged in parallel, and a rotation axis direction of the loop formed by the wire and the wire winding drum is parallel to the traveling direction. A wire-like lid is attached to the wire hanging down from the hoist device, and the lid passes along the gap provided in the ceiling of the sealed chamber. Move with hoist device.
[0006]
A gap is provided in the ceiling of the sealed room provided in the building, and a fume leakage prevention sheet having high elasticity such as rubber or a vinyl chloride sheet is attached to the gap. This fume leakage prevention sheet is normally in a state of covering the ceiling space of the sealed chamber so as not to leak fume, but only the part touching the ship-like lid attached to the wire is elastically deformed. It does not interfere with the movement of the ship-shaped lid. Since the ship-shaped lid attached to the hoist wire is elastically deformed while pushing the fume leakage prevention sheet covering the sealed space ceiling space as the hoist moves, the shape of the ship-shaped lid is preferably streamlined.
[0007]
In addition, since a gas scrubber is attached to the sealed chamber and sucks the gas inside the sealed chamber, the internal pressure of the sealed chamber becomes negative and it is difficult for fumes to escape from the gap.
[Action]
[0008]
The present invention uses a hoist device in which the direction of the axis of rotation of the wire take-up drum and the loop formed by the wire are arranged in parallel and in parallel with the direction of travel of the hoist. Even when the wire is moved up and down, the wire does not swing left and right with respect to the rotation axis direction of the drum. Therefore, the width of the gap provided in the ceiling of the sealed chamber can be reduced, and the absolute amount of fumes leaking from the gap can also be reduced. In addition, since the amount of fume that touches the hoist is reduced, the deterioration rate of the hoist is reduced.
[0009]
In addition, when a fume leakage prevention sheet that is rich in elasticity is installed so as to close the gap provided in the ceiling of the sealed chamber, and the hoist moves along the gap of the ceiling of the sealed chamber, a lid that passes through both wires hanging down from the hoist is provided. Since the fume leakage prevention sheet is pushed forward, the amount of fume that leaks from the gap provided in the ceiling of the sealed chamber is very small.
[0010]
In addition, since the gas inside the sealed chamber is sucked with a gas scrubber or the like, the indoor pressure becomes negative, and it is difficult for fumes to come out of the room through a small gap.
[0011]
The lid that passes through both wires hanging down from the hoist has a streamlined shape like a ship, so that the wire and the fume leakage prevention sheet are not entangled and can be moved smoothly.
【Example】
[0012]
Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a front view of a conventional hoist, and FIG. 2 is a side view thereof. The wire 1 hanging from the hoist has a structure in which one end of a wire end 2 is wound up by a wire take-up drum 3 and the other end of the wire 1 is attached to a part of the hoist across the drum 3. In this method, the attachment width of the wire is large. Further, the movement of the wire in the drum direction is large due to the winding of the wire winding drum. Therefore, it is necessary to widen the gap provided in the ceiling of the sealed chamber, and as a result, the amount of fumes flowing out increases.
[0013]
FIG. 3 is a front view of a hoist used in the present invention, and FIG. 4 is a side view thereof. The wire 1 that hangs down from the hoist is wound on one side of the wire end 2 by the wire winding drum 3, and the other wire end 2 does not straddle the wire winding drum 3, and the side of the hoist in the same direction as the winding side of the wire The structure is attached to the portion 4. That is, the loop formed by the wire and the rotation axis direction of the wire winding drum are arranged in parallel. Furthermore, the loop formed by the wire and the winding drum of the wire are arranged in parallel with the traveling direction of the hoist device. Therefore, there is almost no attachment width of the wire, and even when the hook 6 attached to the tip of the wire is moved up and down, the wire 1 does not swing left and right with respect to the rotation axis direction of the drum. Therefore, the width of the gap provided in the ceiling of the sealed chamber can be reduced, and the absolute amount of fumes leaking from the gap can also be reduced.
[0014]
FIG. 5 shows a gap C along a hoist rail B provided on the ceiling A of the closed chamber, and a state diagram of the hoist device G in which the wire portion is passed through the gap C. Moreover, the attachment state of the fume leakage prevention sheet | seat D and the airtight chamber ceiling A is shown in FIG. A fume leakage prevention sheet D that constantly blocks fume leakage is attached to the gap C of the sealed room ceiling A. The fume leakage preventing sheet D uses a material such as rubber or vinyl chloride that easily elastically deforms.
[0015]
The ship-shaped lid 5 attached to the wire 1 suspended from the hoist device in FIG. 5 moves so as to slide on the gap C in the ceiling of the sealed chamber as the hoist moves. At this time, the ship-shaped lid 5 moves while pushing the fume leakage prevention sheet D attached to the gap C between the ceilings of the sealed chamber.
[0016]
FIG. 7 shows a top view of the contact portion where the ship-shaped lid 5 comes into contact with the movement of the fume leakage prevention sheet D and the hoist, FIG. 8 shows a side view thereof, and FIG. 9 shows a front view thereof. As shown in the figure, the fume leakage prevention sheet D is turned up or raised only by the portion where the ship-shaped lid 5 hits as the hoist moves. Since the ship-like lid 5 attached to the wire 1 suspended from the hoist device thus moves by pushing the fume leakage prevention sheet D, the movement of the hoist becomes smooth and the wire 1 is entangled with the fume leakage prevention sheet D. To prevent. In addition, it has the function of preventing fumes from leaking through the gaps in the ceiling of the sealed room.
[0017]
Since the gas scrubber is attached to the sealed chamber E, and the gas in the sealed chamber is sucked by the gas scrubber, the internal pressure of the sealed chamber E becomes negative, and it is difficult for fumes to go out of the room through a small gap. .
【The invention's effect】
The present invention has the following effects by performing the procedure described above.
[0018]
When carrying a heavy object in the closed room with a hoist directly above the ceiling of the closed room provided in the building, the direction of the wire take-up drum and the loop formed by the wire are arranged in parallel. Since the hoist device arranged in parallel with the direction of travel is used, the work can be performed in a narrow and narrow range. Therefore, the width of the gap provided in the ceiling of the sealed chamber can be reduced and the width covered by the fume leakage prevention sheet can be reduced. In addition, since the ship-shaped lid attached through the wire hanging from the hoist pushes the fume leakage prevention sheet attached so as to close the gap on the top of the sealed chamber, the fume leakage prevention sheet and the wire do not get tangled, and the ship Since the lid is in close contact with the fume leakage prevention sheet, it prevents fume from leaking outside the sealed chamber.
[0019]
Further, since the gas is sucked by the gas scrubber inside the sealed chamber, the indoor pressure becomes a negative pressure, and it is difficult for the fumes to come out of the room through a small gap.
[Brief description of the drawings]
FIG. 1 is a front view of a conventional hoist device.
FIG. 2 is a side view of a conventional hoist device.
FIG. 3 is a front view of a hoist device used in the present invention.
FIG. 4 is a side view of a hoist device used in the present invention.
FIG. 5 is a state diagram in which a hoist device is attached to the ceiling of the closed room and the upper ceiling of the closed room provided in the building.
FIG. 6 is a view showing a state in which the fume leakage prevention sheet and the sealed chamber ceiling are attached.
FIG. 7 is a top view showing a state of a contact portion between a lid on a ship attached to a wire suspended by a hoist and a fume leakage preventing sheet provided on a ceiling of a sealed chamber.
FIG. 8 is a side view showing a state of a contact portion between a lid on a ship attached to a wire suspended by a hoist and a fume leakage preventing sheet provided on a ceiling of a sealed chamber.
FIG. 9 is a front view showing a state of a contact portion between a lid on a ship attached to a wire suspended by a hoist and a fume leakage preventing sheet provided on a ceiling of a sealed chamber.
[Explanation of symbols]
A Sealed room ceiling B Hoist rail C Sealed room ceiling gap D Fume leakage prevention sheet E Sealed room F Building G Hoist device 1 Wire 2 Wire end 3 Drum 4 Hoist side 5 Ship-shaped lid 6 Hook

Claims (1)

When using a hoist device to transport heavy objects in a closed room provided in the building,
A hoist device and a rail on which the hoist device travels are attached to the upper ceiling of the building,
The hoist device has a wire winding drum and a wire, one wire end is attached to the winding drum, and the other wire end is attached to the hoist body frame, and is attached to the wire and body frame hanging around the drum. Using a hoist device in which the loop formed by the wire end and the rotation axis direction of the drum are arranged in parallel, and the rotation axis direction of the loop formed by the wire and the drum is arranged in parallel to the traveling direction of the hoist device;
A gas scrubber is installed in the sealed chamber to make the internal pressure of the sealed chamber negative.
A slender gap is provided along the rail on which the hoist device runs on the ceiling of the sealed chamber, and a fume leakage prevention sheet that is rich in elasticity is attached so as to close this elongated gap,
A ship-shaped lid is passed through the two wires hanging down from the hoist body, and the loop formed by the wire enters the sealed chamber through a gap provided in the ceiling of the sealed chamber, and a hook is attached to the tip of the loop formed by the wire. Having
The ship-shaped lid passed through the wire with the movement of the hoist device moves along the gap in the ceiling of the sealed chamber,
A method for preventing fume leakage in a sealed chamber using a hoist device characterized by

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