JP6397232B2 - Hazardous substance-containing paint removal system - Google Patents

Description

  The present invention relates to a harmful substance-containing coating material removal system for removing a coating material containing harmful substances (asbestos, heavy metals, PCBs, etc.) coated on a wall surface of a building or a steel part of a workpiece.

  Asbestos (asbestos) is excellent in nonflammability, fire resistance, heat insulation and sound absorption. In the past, asbestos has been used as a heat insulation and sound absorption material on the ceiling, walls, floors, pillars and beams of buildings. It was used by spraying as a paint or by adding it to a paint or a base preparation. However, in recent years, it has been pointed out that asbestos is harmful and adversely affects human health, and it is an urgent task to remove paints and building materials containing asbestos. Hereinafter, a harmful substance-containing coating material containing a harmful substance such as asbestos is also simply referred to as a coating material.

  In addition, although the harmful substance contained in a coating material etc. is asbestos in this example, there exist heavy metals, such as lead, PCB (polychlorinated biphenyl) other than asbestos.

  By the way, when dismantling the building, if the dismantling work is performed with the asbestos-containing coating material attached to the wall surface or the like, the asbestos scatters in the air and adversely affects the human body. Moreover, regarding the workpiece, heavy metal such as PCB and lead may be scattered when the coating film is removed during bridge maintenance. Therefore, before dismantling, a coating material such as a wall surface is removed by grinding with a disc grinder (also simply referred to as a grinder) used by a person.

  At this time, in order to prevent the asbestos dust contained in the ground coating material from scattering in the air, a space such as a vinyl sheet is opened to cover the front of the wall surface to form a closed space. In this closed space, the paint is removed with a grinder. After this removal, the vacuum cleaner sucks the coating material dust containing asbestos scattered during grinding.

  As a technique for removing this type of coating material, there is an apparatus described in Patent Document 1.

JP 2009-13751 A

  By the way, as described above, even if a closed space is formed so as to cover the wall surface and the coating material such as the wall surface is removed, the coating material dust containing asbestos adheres to the clothes, body, etc. of the worker. Therefore, a security room with an air shower is provided outside the enclosed space. When a worker leaves the enclosed space, he / she must take an air shower in the security room to remove the paint material adhering to clothes and body. The security room is generally a first room for undressing work clothes to which the operator's coating material dust has adhered, a second chamber for removing paint material dust adhering to the body by blowing an air shower after undressing, and its removal It is comprised from the 3rd chamber where an operator wears clothes later.

  However, when removing the coating material from the wall surface or the like as described above, even if the removal surface of the coating material is wide, it is necessary to cover the removal surface with a sheet to form a closed space. Furthermore, it is necessary to install a security room as described above in which paint dust adhering to the clothes, body, etc. of workers is dropped with an air shower.

  Thus, even if the removal surface of the coating material is wide, it is necessary to construct a closed space with a sheet, and in addition to this, it is necessary to install a security room, which takes time and effort. As a result, there has been a problem that the operation cost for removing the coating material containing harmful substances such as asbestos is increased.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a harmful substance-containing coating material removal system capable of removing a coating material containing a harmful substance from a wall surface or the like at a low cost. .

As a means for solving the above-mentioned problems, the invention according to claim 1 is a harmful substance-containing coating material removal system for removing a coating material that is painted on a surface of a building and contains a harmful substance, the painting material A suction part in which a grinding part for grinding and removing is accommodated in the case so as to be exposed from the opening of the case, and one end of a suction hose is joined to the outer surface of the case through a through hole communicating with the case A grinder, a vacuum device that performs suction from the other end of the suction hose, and is interposed in the middle of the suction hose between the suction grinder and the vacuum device, and is ground by the suction grinder and dust bag for dust collection painting material dust to be sucked is accommodated, a dust collector to which the dust collecting bag alert when becomes full, is interposed in the middle of the suction hose, the collection ChiriSo Collected by HEPA filter coating material dust which has passed through the, the HEPA filter, the HEPA filter system to alert upon a full and become trapped impossible state trapped paint material dust, the dust collecting apparatus and confining only the HEPA filter device in the inner space, the outer surface forming the interior space, a storage room fastener is attached to manipulate the slit communicating with the longitudinal and transverse directions openably, the dust collection bag An interlocking function for stopping a suction glider when the HEPA filter becomes full or when the HEPA filter becomes incapable of collecting , and the vacuum device is disposed outside the storage chamber. and said that you are.

  According to this configuration, the coating material is ground by the grinding portion in the case while the inside of the case is sucked from the opening of the tip end of the suction hose by the suction force of the vacuum device. For this reason, the coating material dust separated by grinding can be sucked by the suction hose and sent to the dust collector and the HEPA filter device without being scattered outside the case. Since the coating material dust is collected and collected by the dust collector and the HEPA filter device, the bag filter and the HEPA filter must be replaced. At this time, since the exchange is performed in the closed space of the storage room, even a small amount of the coating material dust does not scatter in the room or the like. As a result, when the coating material is ground, the coating material dust does not scatter in the space and adhere to the operator's clothes or body.

  Therefore, unlike the conventional case, when removing the coating material, even if the removal surface of the coating material is wide, a construction work of covering all with a sheet to form a closed space becomes unnecessary. In addition, since the coating material dust does not adhere to the clothes and body of the worker, it is not necessary to install a security room for dropping the coating material dust with an air shower. Thus, since no time is required, the coating material containing harmful substances can be removed at low cost.

  The invention according to claim 2 further comprises a negative pressure device that holds the intake chamber at a negative pressure by performing intake air in the storage chamber and discharging the intake air to the outside of the storage chamber. The harmful substance-containing coating material removal system according to claim 1.

  According to this configuration, since the negative pressure device sucks the inside of the storage chamber and maintains the negative pressure, even if the coating material dust is slightly scattered when the bag filter or the HEPA filter is replaced, the scattered coating material is scattered. Dust is inhaled. For this reason, the interior space of the storage chamber can be kept clean so that even a small amount of coating material dust does not float. Thereby, it is possible to prevent the coating material dust from adhering to the clothes or body of the operator in the storage room when the filter is replaced.

  ADVANTAGE OF THE INVENTION According to this invention, the harmful material containing coating material removal system which can remove the coating material containing a hazardous material from a wall surface etc. at low cost can be provided.

It is sectional drawing which shows the structure of the harmful substance containing coating material removal system which concerns on embodiment of this invention. It is sectional drawing which shows the structure of a suction type grinder. It is a perspective view which shows the state in which the bag receiver tank and the HEPA filter apparatus were accommodated in the storage chamber. It is a 1st perspective view for demonstrating the procedure which assembles the frame of a storage chamber. It is a 2nd perspective view for demonstrating the procedure which assembles the frame of a storage chamber. It is sectional drawing which shows the structure which added the negative pressure apparatus to the harmful substance containing coating material removal system which concerns on this embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
<Configuration of Embodiment>
FIG. 1 is a cross-sectional view showing a configuration of a harmful substance-containing coating material removal system according to an embodiment of the present invention.
A harmful substance-containing coating material removal system (also simply referred to as a system) 10 shown in FIG. 1 removes a harmful substance-containing coating material (also simply referred to as a coating material) 3 painted on a wall surface 2 of a room 1 of a building. Is. Regardless of the wall surface 2, the coating material 3 may also be painted on the exposed surfaces such as the floor 5, ceiling, and pillar. However, in this embodiment, the case where the wall surface 2 of the room 1 is painted will be described as an example, but the present invention can be similarly applied to an outer wall of a building. In the present embodiment, the harmful substance is assumed to be asbestos, but there are other heavy metals such as lead, PCB, and the like.

  The system 10 includes a suction grinder 20 used by the operator 4, a bug receiver tank (dust collector) 30, a HEPA filter (High Efficiency Particulate Air Filter) device 40, a vacuum device 50, and a vacuum device 50. The power supply 60 and the storage chamber 70 are provided.

  The bug receiver tank 30 and the HEPA filter device 40 are arranged on the floor 5 of the room 1 and are further housed in an airtight (or also hermetically sealed) space in the room 1 by the storage room 70. The vacuum device 50 and the power source 60 are disposed outside the room.

  The suction grinder 20 and the bag receiver tank 30 are connected by a suction hose 80a, the HEPA filter device 40 and the bag receiver tank 30 are connected by a suction hose 80b, and the HEPA filter device 40 and the vacuum device 50 are connected by a suction hose 80c. Has been. With this connection, air containing dust and the like is sucked from the opening of the suction hose 80a by the suction force of the vacuum device 50.

  As shown in FIG. 2, the suction grinder 20 includes a main body 21 in which a motor (not shown) is incorporated, and a disk having a central portion connected to the tip of a motor shaft 22 protruding from the main body 21. A grinder portion 24 having a cylindrical grinding portion 23 and a bowl-like (concave) case 25 are combined. This combination structure will be described. The grinder portion 24 and the case 25 are fixed by inserting the outer peripheral surface on the distal end side of the main body portion 21 through a through hole formed in the center portion of the case 25. Further, the grinder portion 24 and the case 25 are combined in a state where the grinding surface 23 a of the grinding portion 23 connected to the tip of the shaft 22 protruding from the inserted main body portion 21 is exposed from the opening 25 a of the case 25. ing. The grinding part 23 is rotated by the rotational force of the motor. The grinding part 23 is formed of a hard material having many irregularities on the surface of a grinding wheel or the like in a disk shape or the like.

  Further, a brush 26 is fixed to a peripheral end around the opening 25a of the case 25 in a state of protruding a predetermined length. A through hole 25c that passes through the wall of the outer surface 25b and communicates with the inside and a tip opening (one end) of the suction hose 80a are joined to the outer surface 25b of the case 25 in a communicating state. The case 25 is made of a material that is not easily damaged, such as a metal material or a reinforced resin material. The suction hoses 80a to 80c are formed of a flexible material. Further, instead of the brush 26, a porous flexible material such as a sponge that allows air to pass but does not allow coating material dust to pass therethrough may be used. The coating material dust is dust containing the powder of the coating material 3 that is separated when the coating material 3 is ground by the suction grinder 20.

  The suction-type grinder 20 having such a configuration performs grinding as follows. That is, the operator 4 grips the main body 21 to activate the motor, and presses the brush 26 of the case 25 of the grinding unit 23 that rotates by this activation against the coating material 3 on the wall surface 2. Furthermore, when the operator 4 crushes the brush 26 to deform it, and presses the grinding part 23 against the coating material 3, the grinding surface 23a grinds and removes the coating material 3. At the same time, the removed coating material dust is sucked from the tip opening of the suction hose 80a by the suction of the vacuum device 50 shown in FIG. 1, and passes through the suction hoses 80a, 80b, 80c, and the bag receiver tank 30 and the HEPA. It is collected by the filter device 40. At this time, since the space between the case 25 and the wall surface 2 is closed by the brush 26, air enters the case 25 from the outside of the case 25 through the brush 26. This air flow makes it easy for the coating material dust to be sucked into the suction hose 80 a, and the coating material dust does not come out of the case 25.

  The bag receiver tank 30 has a bag filter (not shown) for collecting dust mounted therein. The bag filter collects dust by passing air containing paint material dust through a filter cloth (not shown), and collects the paint material dust collected by hitting air from the back side of the filter cloth (not shown). )). When the dust bag is filled with the dust of the coating material, suction by the vacuum device 50 is stopped, the mouth of the dust bag is closed, pulled out from the receiver tank, and replaced with a new dust bag. In some cases, replacing the dust bag is replacing the bag filter.

  The fact that the dust bag of the bag filter is full is notified to the worker 4 or other workers by an alarm device such as a buzzer and a lamp (not shown) attached to the bag receiver tank 30. In addition, even if the bag receiver tank 30 and the suction grinder 20 are electrically connected and have an interlock function that automatically stops the suction grinder 20 when the dust bag is full. Good.

  The HEPA filter device 40 incorporates a HEPA filter (not shown) in a detachable manner. The HEPA filter is a filter having a dust collection rate of 99.97% or more when smoking is allowed to pass through the filter once using cigarette smoke (0.3 μm particles) as test dust according to JIS standards. In this HEPA filter, fine coating material dust contained in the air discharged through the suction hose 80b without being collected by the bag receiver tank 30 can be captured almost completely. For this reason, there is almost no coating material dust contained in the exhaust of the HEPA filter device 40.

  The air that flows into the HEPA filter device 40 via the suction hose 80b is air from which most of the coating material dust has already been removed by passing through the bag receiver tank 30 in the previous stage. For this reason, an excessive burden is not applied to the HEPA filter device 40, and the lifetime is significantly increased.

When the HEPA filter is filled with the collected coating material dust and cannot be collected, an alarm device such as a buzzer and a lamp (not shown) attached to the HEPA filter device 40 or other work is performed. To inform the person. It is assumed that the state where it cannot be collected includes clogging. In addition, the HEPA filter device 40 and the suction grinder 20 are electrically connected, and when the HEPA filter becomes incapable of collecting , an interlock function is provided so that the suction grinder 20 automatically stops. You may have.
Hereinafter, the replacement of the bag filter or the HEPA filter is also referred to as filter replacement.

  The vacuum device 50 performs a suction operation by supplying power from a power source 60, and includes a roots blower (a positive displacement blower) (not shown), an electric motor, and an exhaust silencer connected to an exhaust pipe of the roots blower in a casing. Configured.

  The roots blower is actuated by driving the electric motor, and a suction force is generated at the suction port via the intake pipe of the roots blower. The generated suction force is transmitted to the suction hose 80a through the suction hoses 80c and 80b through the HEPA filter device 40 and the bag receiver tank 30, and the coating material dust is sucked from the tip opening of the suction hose 80a. ing. At this time, the exhaust sound of the Roots blower is reduced by the exhaust silencer.

  In addition, since the suction by the Roots blower has a high vacuum pressure, it is possible to efficiently perform the suction of the coating material dust and the long distance suction. For this reason, the vacuum apparatus 50 can be installed outside the work space (the room 1).

  The storage chamber 70 encloses the bag receiver tank 30 and the HEPA filter device 40 in a sealed manner. This is because when the dust collection bag of the bug receiver tank 30 is full of paint material dust, when it is replaced with a new dust collection bag, or the HEPA filter of the HEPA filter device 40 cannot collect the paint material dust. This is to prevent the coating material dust from scattering into the hollow of the room 1 when the state is reached. The sealed state is a state that can be regarded as almost sealed even if it is not completely sealed. This concept is the same for the airtight state.

  As shown in FIG. 3, the storage chamber 70 includes a lower sheet 71, a rectangular parallelepiped frame 72 placed on the upper surface of the lower sheet 71, and an upper sheet 73 that covers the upper surface and side surfaces of the frame 72. Has been.

  The lower sheet 71 is a single sheet laid on the floor, and is a resin sheet such as made of vinyl, polyethylene, or polypropylene.

  The skeleton 72 has a rectangular parallelepiped structure in which a plurality of straight pipes made of resin, lightweight metal, or the like are connected in the vertical direction and the horizontal direction by pipe joints. As shown in FIG. 4, the skeleton 72 is placed on the upper surface of the lower sheet 71. The lower sheet 71 has an area larger than the bottom surface of the skeleton 72, and the outer peripheral edge thereof is bent upward as indicated by an arrow Y1. The bent portion covers the lower part of the side surface of the skeleton 72 as shown in FIG. In the lower sheet 71, as shown in FIG. 4, a through hole 71a through which the suction hose 80a (see FIG. 3) is inserted and a through hole 71b through which the suction hose 80c (see FIG. 3) is inserted are bent. Are formed at substantially opposite positions.

  The upper sheet 73 is a sheet that covers the upper surface and side surfaces of the frame 72 and is made of the same material as the lower sheet 71. In the case of the present embodiment, as shown in FIG. 4, the upper sheet 73 covers the most part of the upper surface and side surfaces of the skeleton 72 by covering the skeleton 72 from above. In addition, one flat sheet may be covered from above the framework 72, and the upper surface and side surfaces thereof may be covered and fixed with a tape or the like, and this may be used as the upper sheet 73.

  As shown in FIG. 3, the lower edge portion of the upper sheet 73 and the upper edge portion of the lower sheet 71 are bonded to each other with an adhesive tape 75 from the inside of the skeleton 72. Thus, the bug receiver tank 30 and the HEPA filter device 40 are installed in the internal space (also referred to as a closed space) of the rectangular parallelepiped storage chamber 70 in which the skeleton 72 is covered with the lower sheet 71 and the upper sheet 73. .

  On one side surface of the rectangular parallelepiped storage chamber 70, an entrance 73a through which an operator enters and exits for filter replacement is formed. The entrance / exit 73a is formed by attaching an L-shaped linear fastener (chuck) 74 in the following manner to a portion of the upper sheet 73 on one side surface of the storage chamber 70 as follows. That is, a slit is formed by extending in a straight line in the vertical direction at a portion near one side (for example, the left side) of one side surface, and extending from the lower end of the vertical slit in a straight line to the right side. Is formed. Further, an L-shaped line fastener 74 for opening and closing the upper sheet 73 along the slits is attached to the vertical and horizontal slits.

  The L-shaped line fastener 74 is normally closed, but is opened into an L-shape when an operator enters the storage chamber 70 by filter replacement or the like. Thereby, the entrance / exit 73a opens. On the contrary, when the wire fastener 74 is closed in an L shape, the entrance / exit 73a is closed.

  Next, a procedure for assembling the storage chamber 70 will be described. First, as shown in FIG. 4, the lower sheet 71 is spread and spread on the floor surface, and a rectangular parallelepiped frame 72 is constructed on the upper surface of the lower sheet 71. Alternatively, a separately constructed frame 72 may be placed on the upper surface of the lower sheet 71. Thereafter, both the bug receiver tank 30 and the HEPA filter device 40 are installed on the lower sheet 71 inside the framework 72, and both are connected by the suction hose 80b.

  Next, the outer peripheral edge portion of the lower sheet 71 is bent upward as indicated by an arrow Y1 to cover the lower portions of the four side surfaces of the skeleton 72 as shown in FIG. Next, as shown in FIG. 4, the upper sheet 73 is covered from above the framework 72, and the upper sheet 73 is covered with the upper sheet 73 as shown in FIG. 5. Further, the lower edge portion of the upper sheet 73 and the upper edge portion of the lower sheet 71 are bonded together with the adhesive tape 75 from the inside of the framework 72.

  Thereafter, a suction hose 80a is inserted into a through hole 71a provided in a portion (lower side surface) where the lower sheet 71 is bent upward, and connected to the bug receiver tank 30 as shown in FIG. Further, the suction hose 80c is inserted into the through hole 71b opened in the side surface facing the through hole 71a of the lower sheet 71 shown in FIG. 5 and connected to the HEPA filter device 40 as shown in FIG. As a result, the bag receiver tank 30 and the HEPA filter device 40 are stored in the storage chamber 70 in a sealed state.

  In addition, it is preferable that the opening diameter of each through-hole 71a, 71b is a dimension that eliminates the gap when the suction hoses 80a, 80c are inserted. Moreover, it is preferable to reinforce the surrounding portions of the through holes 71a and 71b with a reinforcing material such as an annular seal (not shown) so as not to be broken by inserting the suction hoses 80a and 80c.

<Operation of Embodiment>
Next, an operation procedure for removing the harmful substance-containing coating material 3 painted on the wall surface 2 of the room 1 shown in FIG. 1 by the above-described harmful substance-containing coating material removal system 10 will be described.
First, as described above with reference to FIG. 1, the worker (which may be either the worker 4 for grinding or another worker) assembles the storage chamber 70 in the room 1 and sets the bag receiver tank. 30 and the HEPA filter device 40 are stored in the storage chamber 70 in a sealed manner.

  Next, the operator turns on the power supply 60 to activate the vacuum device 50. Thus, suction is started from the opening of the suction hose 80a attached to the suction grinder 20 by the suction force of the vacuum device 50.

  Next, the operator 4 has the main body 21 of the suction grinder 20 in front of the wall surface 2 and starts the motor. As a result, the grinding part 23 rotates, so that the operator 4 presses the brush 26 of the case 25 against the coating material 3 on the wall surface 2 and further presses the grinding part 23 against the coating material 3. As a result, the grinding surface 23a starts to grind and remove the coating material 3.

  The coating material dust removed by the grinding is sucked from the tip opening of the suction hose 80a. The sucked coating material dust first flows into the bag receiver tank 30 through the suction hose 80a. The inflowing coating material dust is collected by the bag filter in the bag receiver tank 30.

  At this time, fine coating material dust that has passed through the bag filter flows into the HEPA filter device 40 through the suction hose 80b. The fine paint material dust that has flowed in is captured almost completely by the HEPA filter device 40. For this reason, there is almost no coating material dust contained in the exhaust to the suction hose 80c of the HEPA filter device 40. Therefore, the component that flows into the vacuum device 50 through the suction hose 80c is substantially only air.

  It is assumed that the dust collection bag is full in the bug receiver tank 30 while the coating material 3 is being ground. This is reported to the worker by, for example, the alarm described above. In this case, the worker 4 stops the grinding work of the coating material 3 and replaces the dust bag. This replacement may be performed by another worker.

  When exchanging the dust bag, the operator 4 opens the L-shaped wire fastener 74 of the storage chamber 70 shown in FIG. 3 and enters the storage chamber 70 through the opened entrance 73a. Close the doorway 73a. Next, the operator 4 closes and seals the mouth of the filled dust bag with a string, a fastener or the like, pulls it out from the bug receiver tank 30, and sets a new dust bag. Thereafter, the operator 4 opens the line fastener 74 to carry out the sealed dust bag from the entrance 73a, and then closes the line fastener 74. Then, the worker 4 stores the carried dust collection bag in a predetermined place.

  On the other hand, it is assumed that the HEPA filter of the HEPA filter device 40 becomes unable to collect the coating material dust while the coating material 3 is being ground. This is reported to the worker by, for example, the alarm described above. In this case, the worker 4 stops the grinding work of the coating material 3 and replaces the HEPA filter of the HEPA filter device 40. This replacement may also be performed by another operator.

  When replacing the HEPA filter, the operator enters the storage chamber 70 in the same manner as when the above-described dust bag is full. Next, the operator takes out the HEPA filter that has become uncollectable from the HEPA filter device 40 and sets a new HEPA filter. Then, the operator 4 opens the wire fastener 74 and seals the HEPA filter that has become uncollectable from the entrance 73a in a bag, and then closes the wire fastener 74 to make it uncollectable. Store the HEPA filter in place.

  After performing such filter replacement, the operator 4 resumes the removal work of the coating material 3. Also, if the dust collection bag is not full or the HEPA filter cannot be collected until the removal work of the coating material 3 is completed, the filter is replaced after the removal work is completed.

<Effect of embodiment>
As described above, the harmful substance-containing coating material removal system 10 according to the present embodiment is applied to a surface such as the wall surface 2 of a building and removes the coating material 3 containing a harmful substance.
A feature of the system 10 of the present embodiment is that it includes a suction grinder 20, a vacuum device 50, a bag receiver tank 30 as a dust collector, a HEPA filter device 40, and a storage chamber 70. .

  The suction grinder 20 is accommodated in the case 25 so that the grinding part 23 for grinding and removing the coating material 3 is exposed from the opening of the case 25, and a through hole 25 c that communicates with the outer surface 25 b of the case 25 into the case 25. One end (tip opening) of the suction hoses 80a to 80c is joined via the.

  The vacuum device 50 performs suction from the other ends of the suction hoses 80a to 80c.

  The receiver tank 30 is interposed in the middle of the suction hoses 80a to 80c between the suction grinder 20 and the vacuum device 50, and collects coating material dust that is ground by the suction grinder 20 and sucked by the suction hoses 80a to 80c. The bag filter to be collected is housed.

  The HEPA filter device 40 is interposed in the middle of the suction hoses 80a to 80c, and is configured to collect the coating material dust that has passed through the bag filter.

  The storage chamber 70 seals the bag receiver tank 30 and the HEPA filter device 40 in an internal space, and opens and closes slits communicating in the vertical and horizontal directions on the outer surface (side surface of the storage chamber 70) forming the internal space. An L-shaped line fastener 74 is attached as a freely operated fastener.

  According to this configuration, when the worker 4 removes the coating material 3 on the wall surface 2 with the suction type grinder 20, the suction force of the vacuum device 50 sucks the inside of the case 25 from the front end opening of the suction hose 80a. The coating material 3 is ground by the grinding part 23 in 25. For this reason, the coating material dust separated by grinding can be sucked by the suction hose 80a and sent to the bag receiver tank 30 and the HEPA filter device 40 without being scattered outside the case 25.

  In the bug receiver tank 30, the coating material dust that has been sent is collected in a bag filter, and the fine coating material dust that could not be collected here is collected almost completely by the HEPA filter device 40. At this time, the filter needs to be replaced when the bag collection bag of the bag filter is full or when the HEPA filter is unable to be collected.

  When this replacement is performed by an operator, the line fastener 74 of the storage chamber 70 is opened to enter the internal space, and then the line fastener 74 is closed to seal the internal space. In this state, the filter is replaced. After this replacement, the wire fastener 74 is opened, and the replaced dust collection bag and HEPA filter are carried out from the storage chamber 70. Thereafter, the line fastener 74 is closed to make the internal space of the storage chamber 70 hermetically sealed.

  For this reason, at the time of filter replacement, the coating material dust does not scatter in a space such as the room 1 where the coating material 3 is ground. Since the coating material dust does not scatter in the space for grinding in this way, the coating material dust does not scatter in the space and adhere to the clothes, body, etc. of the operator 4 during grinding as in the prior art.

  As a result, when removing the coating material 3 from the wall surface 2 or the like as in the prior art, even if the removal surface is wide, it is not necessary to cover the removal surface with a sheet to form a closed space. In addition, since the coating material dust does not adhere to the clothes and body of the worker, it is not necessary to install a security room for dropping the coating material dust with an air shower.

  In the system 10 of this embodiment, it is not necessary to install a security room, and it is not necessary to cover the removal surface of the coating material 3 with a sheet to form a closed space. For this reason, the work cost for removing the coating material 3 containing a harmful substance can be made cheaper than the conventional system. In other words, there is an effect that the coating material 3 containing harmful substances can be removed from the wall surface 2 or the like at a low cost.

<Modification of Embodiment>
In the system 10 described above, as shown in FIG. 6, the negative pressure device 100 may be additionally arranged in the storage chamber 70.

  The negative pressure device 100 performs intake as indicated by an arrow Y2 in the closed space of the storage chamber 70 and exhausts the intake air to the outside of the storage chamber 70, thereby holding the closed space of the storage chamber 70 at a negative pressure. To do. The negative pressure device 100 is disposed in the storage chamber 70, and one end of the exhaust hose 101 is connected to an exhaust port provided at a position facing an intake port (not shown) of the negative pressure device 100. The other end of the hose 101 passes through the storage chamber 70 and is placed on the floor 5 outside the storage chamber 70.

  According to this configuration, air in the storage chamber 70 is sucked from the suction port of the negative pressure device 100. The sucked air is exhausted from the exhaust port of the negative pressure device 100 to the outside of the storage chamber 70 through the exhaust hose 101. By the intake and exhaust operations, the inside of the storage chamber 70 is held at a negative pressure. The negative pressure device 100 may be configured to remove dust with a filter or the like when performing intake and exhaust.

  By holding the inside of the storage chamber 70 at a negative pressure with the negative pressure device 100 as described above, the following operational effects can be obtained. That is, as described above, when the operator replaces the filter in the closed space of the storage chamber 70, it is assumed that the coating material dust is slightly scattered. At this time, since the storage chamber 70 has a negative pressure, air does not move to the outside of the storage chamber 70. For this reason, the coating material dust slightly scattered does not leak out of the storage chamber 70. Therefore, the closed space of the storage chamber 70 can be kept clean so that even a small amount of coating material dust does not float.

  Thereby, it is possible to prevent the coating material dust from adhering to the clothes or body of the operator in the storage chamber 70 when the filter is replaced.

  In addition, the specific configuration can be appropriately changed without departing from the gist of the present invention. For example, the negative pressure device 100 may be installed outside the storage chamber 70, and only an intake port having a specific function may penetrate the side surface of the storage chamber 70 and communicate with the internal space. Also in this case, air in the storage chamber 70 is sucked from the suction port of the negative pressure device 100, and the sucked air is exhausted to the outside of the storage chamber 70. As shown in FIG. 3, this configuration has an advantage that the negative pressure device 100 can be added later even after the bag receiver tank 30 and the HEPA filter device 40 are stored in the storage chamber 70.

  In addition to the suction operation from the suction hose 80b and the discharge operation from the suction hose 80c, the HEPA filter device 40 further has a specific function of sucking ambient air through the HEPA filter and exhausting it to the vacuum device 50. You may prepare. However, in the specific function, the air sucked from the suction hose 80b does not go to the exhaust port.

  The HEPA filter device 40 further provided with a specific function sucks ambient air through the HEPA filter in addition to the suction from the suction hose 80b. In this case, as described above, after the operator replaces the filter in the internal space of the storage chamber 70, another worker activates the vacuum device 50. As a result, the HEPA filter device 40 sucks air in the storage chamber 70 in addition to suction from the suction hose 80b, so even if a very small amount of coating material dust is scattered in the closed space when the filter is replaced, The coating material dust is sucked by the HEPA filter device 40. Also by this, the interior space of the storage chamber 70 can be kept clean so that the coating material dust does not float even a little, and the coating material dust can be prevented from adhering to the clothes or body of the operator.

  Furthermore, the storage chamber 70 shown in FIGS. 3 to 5 may have a structure in which the lower sheet 71 is not provided, the upper sheet 73 covers only the upper surface and side surfaces of the skeleton 72, and the bottom surface is opened. In this case, through holes 71 a and 71 b (see FIG. 5) for inserting the suction hoses 80 a and 80 c are formed on the opposite side surfaces of the upper sheet 73. Hereinafter, in order to distinguish the storage chamber whose bottom surface is opened from the storage chamber 70 described above, a description will be given with reference numeral 70A.

  When the storage chamber 70A is used, first, the storage chamber 70A is created by covering the frame 72 with the upper sheet 73. Next, as shown in FIG. 5, both the bug receiver tank 30 and the HEPA filter device 40 are installed on the floor surface, and both are connected by the suction hose 80b.

  Next, the storage chamber 70A is covered from above both, the suction hose 80a is inserted into the through hole 71a, and the suction hose 80c is inserted into the through hole 71b. As shown in FIG. 3, the bug receiver tank 30 and the HEPA filter device 40 are inserted. Is placed in the internal space of the storage chamber 70A. The storage chamber 70 </ b> A in this state is substantially sealed because the bottom side of the four side surfaces is in contact with the floor 5 (see FIG. 1), although the bottom surface is open.

  In addition, instead of the through holes 71a and 71b, cross-shaped slits that intersect vertically and horizontally may be formed on the opposite side surface of the upper sheet 73. In the case of this slit, after inserting the suction hoses 80a and 80c, the gap may be closed with tape.

10 Hazardous Substance-Containing Coating Material Removal System 20 Suction Grinder 30 Bag Receiver Tank (Dust Collector)
40 HEPA filter device 50 Vacuum device 60 Power supply 70 Storage chamber 80a-80c Suction hose 100 Negative pressure device 101 Exhaust hose

Claims (2)

A hazardous material-containing paint removal system that removes paint that contains paint and is applied to the surface of a building.
A grinding part for grinding and removing the coating material is accommodated in the case so as to be exposed from the opening of the case, and one end of the suction hose is joined to the outer surface of the case through a through hole communicating with the case. A suction grinder,
A vacuum device for performing suction from the other end of the suction hose;
A dust collection bag for collecting the coating material dust collected by the suction type grinder and sucked by the suction hose is accommodated in the middle of the suction hose between the suction type grinder and the vacuum device , A dust collector that issues an alarm when the dust bag is full ;
When the coating material dust that is interposed in the middle of the suction hose and passes through the dust collecting device is collected by the HEPA filter, and the HEPA filter becomes full with the collected coating material dust, and becomes unable to be collected. A HEPA filter device that issues a warning to
A storage chamber in which only the dust collector and the HEPA filter device are confined in an internal space, and an outer surface forming the internal space is provided with a fastener for opening and closing a slit communicating in the vertical and horizontal directions ;
An interlock function that stops the suction glider when the dust bag is full or when the HEPA filter is in the non-capturing state ,
The vacuum device is disposed outside the storage chamber, and is a harmful substance-containing coating material removal system. 2. The harmful device according to claim 1, further comprising a negative pressure device that holds the storage chamber at a negative pressure by performing intake air in the storage chamber and discharging the intake air to the outside of the storage chamber. Substance-containing paint removal system.

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