JP5757067B2 - Removing asbestos-containing material - Google Patents

Description

  The present invention relates to a method for removing an asbestos-containing material sprayed on the surface of a substrate.

  Conventionally, asbestos-containing materials such as sprayed asbestos materials and asbestos-containing sprayed rock wool are removed by roughing with a tool such as a keren rod, and then, for example, brushes are used to scrape residual deposits mainly composed of cement components. The work is done by dropping and polishing. Further, as a removal method with improved work efficiency compared with the case of human power, a method using a removal device or the like is disclosed in Patent Documents 1 and 2, for example.

Patent Document 1 is provided with a brush and a scraper that are appropriately driven in a bucket provided at the tip of a manipulator, and the brush and scraper are operated and peeled in the state in which the opening of the bucket is pressed against the asbestos surface. It describes an apparatus for processing by dropping asbestos into a bucket as it is and transferring it from the bucket to a processing container or the like.
In Patent Document 2, a cut brush (peeling means) for peeling the asbestos-containing material, an inner hood that surrounds the peeling means, an outer hood that surrounds the inner hood, and a treatment tank for removing the asbestos-containing material from the inner hood. An asbestos removing device having a suction means for sucking into the air is disclosed.

JP-A-8-199832 JP 2008-253857 A

However, the conventional asbestos removal method has the following problems.
That is, in the asbestos removal method using the asbestos removal apparatus as shown in Patent Documents 1 and 2, the work space where the apparatus cannot be installed is a narrow place, or a complicated shape such as an H-shaped steel material is used. It has been difficult to use an asbestos removal device for the base material coated with an asbestos-containing material. For this reason, under conditions where it is difficult to apply such a removal apparatus, there is a current situation in which it is necessary to rely on a removal method by human power, and there is a problem that it takes time and work.

  The present invention has been made in view of the above-mentioned problems, and it is possible to reduce the work time by simple work, and to ensure the asbestos-containing material even when the narrow work space and the base material shape are complicated. It aims at providing the removal method of the asbestos containing material which can be removed.

In order to achieve the above object, the method for removing an asbestos-containing material according to the present invention is a method for removing an asbestos-containing material coated on the surface of a substrate, and the asbestos-containing material is provided with a cut that reaches the substrate. The method includes a step and a step of injecting from the surface of the asbestos-containing material into the cut using a pressure injection gun capable of injecting the acidic liquid , and applying the pressure to infiltrate the acidic liquid .

  In the present invention, after providing a break in the asbestos-containing material, by injecting and penetrating the acidic liquid into the asbestos-containing material, the cement and organic matter of the asbestos-containing material are decomposed and dissolved by a chemical reaction with an acid. The block-shaped asbestos-containing material partitioned by the cuts can be peeled off from the substrate and allowed to fall naturally. That is, by making a cut in the asbestos-containing material, there is no continuity in the planar direction of the asbestos-containing material coated on the base material, it becomes a block shape partitioned into a certain size (region), between adjacent blocks The holding power is also lost. Therefore, it is possible to reliably drop the acid liquid by penetrating the adhesion surface in each block.

  In this way, it is possible to remove the asbestos-containing material with almost no residue remaining on the base material by a simple operation such as providing a cut, and further equipped with a conventional large removal device and manipulator. The removal robot becomes unnecessary, and the troublesome work such as polishing after roughing with a keren rod becomes unnecessary. Therefore, even in a narrow work space, the removal work can be easily performed in a short time by human power. Moreover, for example, even when the base material is formed of a complicated shape such as an H-shaped steel material or a bolt, the removal can be performed in a state where there is almost no residue of asbestos-containing material.

According to the method of removing the asbestos-containing material of the present invention, adhesion between the base material containing asbestos material by simple work without hassle such injecting an acid solution using, for example, injection jig after providing cuts on the asbestos-containing material It can be dissolved and peeled on the surface, and even if the base material has a complicated shape, it can be reliably removed with almost no residue remaining, and the working time can be reduced. In addition, since a large removal device or the like is not used, the removal operation can be performed even in a narrow work space.

It is a figure for demonstrating schematic structure of the removal method of the asbestos containing material by the 1st Embodiment of this invention. It is a figure which shows the state of the cut | interruption formed in asbestos containing material, Comprising: It is the figure which looked at the surface of asbestos containing material. It is an enlarged view of the syringe shown in FIG. It is a figure which shows the front-end | tip part of the injection needle shown in FIG. It is a figure for demonstrating schematic structure of the removal method of the asbestos containing material by 2nd Embodiment. It is a side view which shows schematic structure of the injection gun by a 1st modification. It is a figure which shows schematic structure of the injection scraper by a 2nd modification. It is a side view of the injection scraper shown in FIG. It is a figure which shows the structure of the syringe by a 3rd modification. It is a figure which shows the shape of the other pouring opening of a 3rd modification. It is a figure which shows the shape of the other injection needle of a 3rd modification. It is a figure which shows schematic structure of the comb injection tool by a 4th modification. It is a figure which shows the other comb-shaped injection tool of a 4th modification. It is a figure which shows schematic structure of the double nail type injection tool by a 5th modification. It is a sectional side view which shows schematic structure of the inflatable injection tool by a 6th modification, Comprising: (a) is a figure which shows the state before injection | pouring, (b) is a figure which shows the state after injection | pouring. FIG. 16 is a front view of the inflatable injection device shown in FIG. 15. It is a figure which shows schematic structure of the hollow drill type injection tool by a 7th modification. It is a sectional side view which shows schematic structure of the capsule type injection device by the 8th modification. It is a figure which shows the construction state by the capsule type injection tool shown in FIG. It is side sectional drawing which shows the other cap of an 8th modification. It is a figure which shows schematic structure of the T-bar shaped injection tool by a 9th modification. (A), (b) is a figure which shows the construction state by the T-bar shaped injection tool shown in FIG. It is a figure which shows schematic structure of the robot arm by a 10th modification. It is the figure which provided the protection sheet | seat on the robot arm shown in FIG.

  Hereinafter, the removal method of the asbestos containing material by embodiment of this invention is demonstrated based on drawing.

(First embodiment)
As shown in FIG. 1, the asbestos-containing material removal method according to the first embodiment is applied to the surface 1a of a base material 1 made of a reinforced concrete slab such as a building or an H-shaped steel material that supports the slab from below. This is applied to construction for removing the coated asbestos-containing material 2. The base material 1 is constructed by spraying, for example, an asbestos-containing material 2 having a spray thickness of about 25 to 60 mm. Examples of the asbestos-containing material 2 include sprayed asbestos material and asbestos-containing sprayed rock wool.

  The asbestos-containing material 2 is removed by providing the asbestos-containing material 2 with a mesh-like cut K1 shown in FIG. 2 reaching the base material 1, and then using a hand-held syringe 10 (injection jig) shown in FIG. The injection needle 102 of the syringe 10 is inserted from the cut K1, and the acidic liquid 3 is injected in the vicinity of the adhesion surface T of the asbestos-containing material 2 with the base material 1, whereby the asbestos-containing material 2 is poured into the acidic liquid 3 It is a method of removing the asbestos-containing material 2 that has fallen and let it fall naturally while being reacted and dissolved.

  Here, examples of the acidic liquid 3 injected near the adhesion surface T include mineral acids such as hydrochloric acid, and organic acid aqueous solutions such as acetic acid and citric acid. The acidic liquid 3 has an action of reacting with and dissolving the asbestos-containing material 2 and is used for separating the base material 1 by peeling off the base material 1 by being injected in the vicinity of the adhesion surface T. Yes, depending on conditions such as the material of the asbestos-containing material 2, its spraying thickness dimension, and the material of the base material 1, for example, the PH value is adjusted to about 1 to 4 for use.

The cut K1 formed in the asbestos-containing material 2 is constructed using, for example, a cutting tool (not shown) such as an electric saw, and the gap (mesh gap D shown in FIG. 2) of the cut K1 is, for example, about 50 to 1000 mm. Is set. This mesh interval D is appropriately set according to the spraying thickness dimension and strength of the asbestos-containing material 2 and is a block-like asbestos-containing material in a region partitioned by the cut K1 by the penetration of the acidic liquid 3 injected into the adhesion surface T. 2 (symbol 2A shown in FIGS. 1 and 2) is preferably large enough to allow natural fall.
In FIG. 2, the mesh interval D is equal. However, the mesh interval D is not limited to this. For example, the surface of the asbestos-containing material 2 at a location where a bolt or steel material is provided has a complicated shape. Thus, the mesh interval D can be made smaller than usual.

A syringe 10 shown in FIG. 3 for injecting the acidic liquid 3 into the adhesion surface T includes a main body 101 capable of sucking an appropriate amount of the acidic liquid 3 and an injection needle 102 capable of piercing the asbestos-containing material 2. A well-known form that can be held by hand can be used.
As shown in FIG. 4, the injection needle 102 has a length dimension that is at least larger than the coating thickness dimension of the asbestos-containing material 2 on the base material 1, and a spout 103 that forms a lateral hole is formed at the distal end portion 102 a. Is provided. That is, since the needle hole of the injection needle 102 is opened sideways, when the injection needle 102 is inserted into the asbestos-containing material 2, the asbestos-containing material 2 enters the spout 103 and causes clogging, and the injection of the acidic liquid 3 It is designed to prevent problems such as obstruction.

Next, the method for removing the asbestos-containing material 2 and the action of the asbestos-containing material 2 during construction will be described more specifically.
First, as shown in FIG. 1, a scattering inhibitor (not shown) such as ASTECTOR S (registered trademark) is sprayed on the surface 2 a of the asbestos-containing material 2 to be removed. Thereafter, as shown in FIG. 2, a cut K1 is provided at an appropriate mesh interval D. In the state where the cut line K1 is merely provided, the blocks of the individual partitioned areas 2A are attached to the base material 1, and the blocks are not in a state of spontaneous fall.

  Subsequently, as shown in FIG. 1, the syringe 10 in which the acidic liquid 3 has been sucked is used so that the distal end portion 102a (the spout 103) of the injection needle 102 is at an appropriate injection position (near the attachment surface T). The acidic liquid 3 is injected into the adhesion surface T at the back of the cut K1.

By injecting the acidic liquid 3 onto the adhesion surface T, the cement and organic matter in the adhesion portion on the base material 1 side of the asbestos-containing material 2 are decomposed and dissolved by a chemical reaction with an acid. As a result, the block-shaped asbestos-containing material 2A partitioned by the cut K1 is peeled off from the base material 1 and spontaneously falls.
Further, by providing the cut K1, the continuity in the planar direction of the asbestos-containing material 2 to be coated on the base material 1 is lost, and it becomes a block shape partitioned into a certain size (region), so that adjacent blocks are held. Power is also lost. For this reason, the acidic liquid 3 is allowed to permeate the adhering surface T of each block-shaped asbestos-containing material 2A, so that reliable fall is possible.

In addition, since the asbestos-containing material 2 has peeled off the surface 1a of the base material 1 on which the asbestos-containing material 2 has dropped (the adhesion surface T with the asbestos-containing material 2), the residual deposits of the asbestos-containing material 2 are present. Almost no state remains.
Further, the dropped asbestos-containing material 2 can be removed by an appropriate recovery means. Here, in this Embodiment, since the scattering inhibitor is sprayed in advance on the surface 2a of the asbestos-containing material 2, the asbestos scattering that occurs when the asbestos-containing material 2 peels and falls can be suppressed.

  Furthermore, by inserting the spout 103 of the injection beam 102 of the syringe 10 to a position that easily reaches the base material 1 and injecting the acidic liquid 3 from the spout 103, the base material 1 and the asbestos-containing material 2 The acidic liquid 3 can be reliably permeated into the adhesion surface T.

  According to such a removing method, it is possible to remove the asbestos-containing material 2 from the base material 1 in a state where there is substantially no adhesion remaining by a simple operation of forming the cut K1 and an injection operation. Such a large removal device and a removal robot equipped with a manipulator are not required, and a troublesome operation such as polishing after roughing with a keren rod is also unnecessary. Therefore, even in a narrow work space, the removal work can be easily performed in a short time by human power.

  In addition, although it has set as the method of injecting the acidic liquid 3 by inserting the injection needle 102 of the syringe 10 into the mesh-shaped cut | interruption K1, the insertion position of the injection needle 102, ie, injection | pouring position, is not limited to this. For example, as shown in FIG. 2, the acid liquid 3 is injected into the adhesion surface T at this position (central portion P0) by being inserted into the substantially central portion P0 of the block-shaped asbestos-containing material 2A partitioned by the cut K1. It doesn't matter. In this case, since the acidic liquid 3 injected into the adhesion surface T spreads uniformly around the substantially central portion P0, the block-shaped asbestos-containing material 2 can be more reliably peeled and dropped.

  As described above, in the method for removing asbestos-containing material according to the first embodiment, the asbestos-containing material 2 is provided with the cut K1 and then injected with the acidic liquid 3 using the syringe 10 without the hassle-free work. The asbestos-containing material 2 can be dissolved and peeled off at the adhesion surface T with the base material, and even if the base material 1 has a complicated shape, it can be reliably removed with almost no residue remaining, The working time can be reduced. In addition, since a large removal device or the like is not used, the removal operation can be performed even in a narrow work space.

  Next, other embodiments and modifications of the asbestos-containing material removal method of the present invention will be described with reference to the accompanying drawings. However, the same or similar members and parts as those in the first embodiment described above are used. The same reference numerals are used to omit the description, and a configuration different from the first embodiment will be described.

(Second Embodiment)
As shown in FIG. 5, the asbestos-containing material removal method according to the second embodiment is provided with a cut K <b> 1 that reaches the base material 1 in the asbestos-containing material 2, and uses a pressure injection gun 11 (injection jig). In this method, the asbestos-containing material 2 is infiltrated with the acidic liquid 3 by applying pressure from its surface 2a. That is, the second embodiment is different from the first embodiment, which is a method of injecting the acidic liquid 3 directly onto the adhesion surface T between the base material 1 and the asbestos-containing material 2.
The base material 1 according to the second embodiment is a steel material of H-section steel, and the asbestos-containing material 2 is coated on the surface 1a by spraying or the like.
Further, since the cut K1 is constructed with a predetermined mesh interval by an electric saw or the like, as in the first embodiment described above, detailed description thereof is omitted here.

The pressure injection gun 11 is a hand-held gun type, has a lever type injection operation unit 111 and an injection nozzle 112 provided at the tip, and is connected to the acidic liquid supply unit 12 and is connected to the acidic liquid. The pressurized acidic liquid 3 is supplied from the supply unit 12.
The acidic liquid supply unit 12 includes a chemical tank 13 that stores the acidic liquid 3, a liquid feeding pipe 14 that connects the chemical tank 13 and the pressurized spray gun 11, and a pressure feeding interposed in the middle of the liquid feeding pipe 14. A pump 15 and a reservoir 16 provided downstream of the pressure feed pump 15 for delivering the acidic liquid 3 at a set pressure.

The acidic liquid 3 in the chemical tank 13 is pressurized by the pressure pump 15 and is sent to the pressure injection gun 11 at the injection pressure set by the reservoir 16. The injection pressure at this time is a pressure that allows pressure to penetrate from the surface 2a of the asbestos-containing material 2 by injection, and is, for example, 5 to 1000 kgf / cm ² .
The pressure feed pump 15 is provided with an appropriate mechanism for preventing the pressure from being increased to a predetermined pressure or higher, and the liquid feed tube 14 is made of a material that can withstand the predetermined pressure.

The pressurized spray gun 11 has its spray nozzle 112 brought into contact with the surface 2a of the asbestos-containing material 2 with the cut K1, or at a slightly spaced position, the spray operation unit 111 is pushed and pressurized. The liquid 3 can be injected and the acidic liquid 3 can be pressure-infiltrated into the asbestos-containing material 2. At this time, the pressurized acidic liquid 3 sprayed from the pressure spray gun 11 is sprayed continuously or intermittently.
In addition, at the time of construction, it is possible to prevent scattering during injection by pressurization by moistening the surface 2a of the asbestos-containing material 2 in advance with a wetting agent before performing the injection by the pressure injection gun 11. It is.

In the method for removing asbestos-containing material according to the second embodiment, the acidic liquid 3 that permeates into the asbestos-containing material 2 from the pressurized spray gun 11 reaches the surface 1a (attachment surface T) of the base 1, and further It spreads to the periphery along the adhesion surface T. Thus, by allowing the acidic liquid 3 to permeate the adhesion surface T, the cement and the organic matter in the adhesion portion on the base material 1 side of the asbestos-containing material 2 are decomposed and dissolved by a chemical reaction with an acid. As a result, the block-shaped asbestos-containing material 2 partitioned by the cut K1 is peeled off from the base material 1 and spontaneously falls.
In the second embodiment, there is no work for inserting the injection needle 102 of the syringe 10 (see FIG. 1) into the asbestos-containing material 2 as in the first embodiment, and the injection at the time of insertion is performed. Since there is no breakage of the needle 102, work efficiency can be improved.

  The injection position by the pressure injection gun 11 may be any position as long as it is the surface 2a of the asbestos-containing material 2. However, the cut K1 that has been constructed extends from the surface 2a of the asbestos-containing material 2 to the surface 1a ( Since it communicates to the adhesion surface T), the acidic liquid 3 is sprayed from the pressurized spray gun 11 toward the cut K1, so that the entire adhesion surface T can be more reliably permeated.

Next, the first modification to the tenth modification will be specifically described.
In addition, the following 1st modification-10th modification are the modifications of 1st Embodiment mentioned above, Comprising: When the acidic liquid 3 is inject | poured into the adhesion surface T from an injection jig using the cut K1. And from the surface 2a of the asbestos-containing material 2 without using the cut K1 (for example, including the substantially central portion P0 of the block-shaped asbestos-containing material 2A partitioned by the cut K1 of the first embodiment described above). One of the cases where the injection jig is inserted and injected is illustrated, but either case is possible.

(First modification)
In the first modification, the asbestos-containing material 2 is removed using a caulking gun type injection gun 17 (injection jig) shown in FIG. 6 instead of the syringe 10 (see FIG. 1) of the first embodiment described above. Is.
That is, the injection gun 17 includes a cylindrical chemical liquid filling portion 171 filled with the acidic liquid 3, an injection drill 172 having a flow path (not shown) communicating with the tip of the chemical liquid filling portion 171, and the chemical liquid filling portion 171. An injection operation grip 173 for supporting the rotation and injecting the acidic liquid 3 in the chemical liquid filling part 171 from the tip opening 172a of the injection drill 172, and a rear end 171a side of the chemical liquid filling part 171 are provided. And a rotation lever 174 for rotating the chemical solution filling unit 171 having the manual operation. The rotation lever 174 is detachably provided on the rear end 171a side of the chemical solution filling portion 171. When the rotation lever 174 is engaged with the rear end 171a side, the chemical solution filling portion 171 and the injection drill 172 are rotated with the rotation of the rotation lever 174. May be configured to rotate.

  In the first modified example, the injection drill 172 is caused to enter the central portion P0 of the block of the asbestos-containing material 2 defined by the cut K1 shown in FIG. 2 by rotation, and the drill tip opening 172a is formed on the base material 1 (attachment surface T). ) Is reached, the injection operation grip 173 can be pushed to inject the acidic liquid 3 in the chemical liquid filling part 171 toward the adhesion surface T. Alternatively, a method of inserting the injection drill 172 of the injection gun 17 directly into the cut K1 and injecting the acidic liquid 3 onto the adhesion surface T may be used.

(Second modification)
7 and FIG. 8, the asbestos-containing material 2 is replaced by using a scraper-shaped injection scraper 18 (injection jig) instead of the syringe 10 (see FIG. 1) of the first embodiment described above. To be removed.
That is, the jet scraper 18 is provided with a flow path 182 for the acidic liquid 3 inside the scraper body 181 having a gripping portion 181 a and a blade 181 b, and the flow path 182 passes through the liquid feed pipe 14 to the chemical tank 13. It is connected. A pressure feed pump 15 is provided between the injection scraper 18 and the chemical tank 13. A valve opening / closing button 183 is provided on the grip portion 181 a of the scraper body 181. The flow path 182 is branched into a plurality of flow paths from the gripping portion 181a by the blade 181b, and each is connected to the opening 181c at the blade tip.

  In the second modification, the blade 181b of the injection scraper 18 is inserted into the linear cut K1 shown in FIG. 2 until it reaches the base material 1, and the pressure pump 15 is driven by pressing the valve opening / closing button 183, whereby the chemical tank 13 The acidic liquid 3 in the inside can be passed through the flow path 182 in the scraper main body 181 via the liquid feeding pipe 14, and the acidic liquid 3 can be injected toward the adhesion surface T from the opening 181 c at the blade tip.

(Third Modification)
The third modification shown in FIGS. 9 to 11 is obtained by replacing the configuration of the injection needle 102 of the syringe 10 (see FIG. 4) of the first embodiment described above.
The injection needle 104 of the syringe 10 shown in FIG. 9 has a configuration including spouts 105, 105,... Accordingly, there is an advantage that the acidic liquid 3 can be injected into a wider range, and even if any of the spouts 105 is clogged, it can be injected from the other spouts 105.

  Further, as shown in FIG. 10, as the shape of the spout 105, a taper 105 a that gradually decreases in diameter from the outer peripheral surface to the inner peripheral surface of the injection needle 104 is formed, and such a taper 105 a is provided. Thus, clogging of the spout 105 can be suppressed.

  Further, the injection needle 106 shown in FIG. 11 has a large outer diameter of the needle tip 106a, and the diameter of the injection port 107A provided in the needle tip 106a portion is larger than that of the injection port 107B of the needle shaft portion 106b. Thus, more acidic liquid 3 can be injected on the adhesion surface T.

(Fourth modification)
In the fourth modified example, the asbestos-containing material 2 is replaced by using the comb-shaped injection tools 19 and 20 (injection jigs) shown in FIGS. 12 and 13 instead of the syringe 10 (see FIG. 1) of the first embodiment described above. In the second modified example described above, the injection scraper 18 (see FIG. 7) is replaced with a comb-shaped injection tool 19. The chemical tank 13, the liquid feed pipe 14, and the pressure feed pump 15 shown in FIG.

A comb-shaped injection device 19 shown in FIG. 12 has a comb-shaped portion 192 having a plurality of needles 191 each having an injection opening 191 a at the tip thereof fixed to the grip portion 193, and the liquid feed tube 14 is provided inside the grip portion 193. A connected channel (not shown) is provided. The plurality of needles 191 has a plurality of different length dimensions. The difference in length of the needles 191 is, for example, about 30 to 50 mm.
In this comb-shaped injection tool 19, after inserting the comb-shaped portion 192 into the cut K1 shown in FIG. 2 until reaching the surface 1a of the base material 1 in the same manner as the second modification described above, The acidic liquid 3 can be injected toward the adhesion surface T. At this time, since the length of the needle 191 is different and the position of the injection opening 191a is different, injection into a wide range is possible.

  Moreover, it is also possible to make circular cross-section like the comb injection tool 20 shown in FIG. In this case, the needle 201 (201A) located at the center of the cross section has the longest dimension, and is configured to gradually shorten toward the outer periphery in the radial direction, whereby the block of the asbestos-containing material 2 partitioned by the cut K1. The acidic liquid 3 can be injected from each needle 201 when the needle 201A inserted from the surface 2a and located at the center of the cross section reaches the base material 1.

(5th modification)
In the fifth modification shown in FIG. 14, the asbestos-containing material 2 is removed using a double nail-shaped injection tool 21 (injection jig) instead of the syringe 10 (see FIG. 1) of the first embodiment described above. Is. FIG. 14 is a diagram showing a work procedure at the time of injection, and shows all work states for each procedure for easy understanding.
The double nail-shaped injection tool 21 shown in FIG. 14 includes an axial core portion 211 and a bottomed cylindrical outer tube 212 into which the axial core portion 211 can be inserted. An injection opening 213 is provided at the center of the bottom 212 a of the outer tube 212 and at the tip of the outer tube 212. The shaft core portion 211 and the outer tube 212 are each made of a member such as metal or hard resin. A protruding portion 211a that engages with the injection opening 213 of the outer tube 212 is provided at the tip of the shaft core portion 211. When the double nail-shaped injection tool 21 is driven into the asbestos-containing material 2 and inserted, By engaging the protrusion 211a with the opening 213, the injection opening 213 can be held without being crushed or clogged.

In the double nail injection device 21 of the fifth modified example, when the acidic liquid 3 is injected into the asbestos-containing material 2, first, the shaft core portion 211 is inserted into the outer tube 212 and the shaft core portion 211 is then inserted. The end 211 b is driven with a hammer 214 and inserted into the asbestos-containing material 2. When the injection opening 213 at the tip of the outer tube 212 reaches the base material 1, the driving is stopped, and the shaft portion 211 is pulled out from the outer tube 212 while leaving the outer tube 212 in the asbestos-containing material 2 as it is. Thereby, the protrusion 212a engaged with the injection opening 213 is also extracted together with the shaft core 211, and the injection opening 213 communicates with the hollow portion of the outer tube 212. Next, the acidic liquid 3 is injected from the injection opening 213 toward the attachment surface T by supplying the acidic liquid 3 to the hollow portion of the outer tube 212 by an appropriate method (not shown).
In addition, by providing a notch (not shown) extending radially around the injection opening 213 at the tip of the outer tube 212, the acidic liquid 3 ejected from the injection opening 213 can be diffused in the radial direction.

(Sixth Modification)
In the sixth modification shown in FIGS. 15 and 16, the asbestos-containing material 2 is removed by using an inflatable injector 22 (injection jig) instead of the syringe 10 (see FIG. 1) of the first embodiment described above. To do.
That is, the inflatable injection device 22 includes a flat plate 221 provided with a flow path 220 for the acidic liquid 3 and a plurality of injection needles provided on the one surface 221a of the plate 221 with a predetermined interval and communicating with the flow path 220. 222 and an expansion / contraction member 223 provided over the entire surface of the other surface 221b of the plate 221. A spout (not shown) is provided at the tip of the injection needle 222. The inflatable injection device 22 is provided with a chemical tank 13, a liquid feed pipe 14, and a pressure feed pump 15 shown in FIG. 12 similar to those of the above-described fourth modified example. The flow path 220 is connected.

Next, a method for injecting the acidic liquid 3 using the inflatable injector 22 according to the sixth modification will be described.
As shown to Fig.15 (a), the base material 1 with which the asbestos containing material 2 is coat | covered is H-section steel, and the existing wall 4 is provided in this at predetermined intervals. In this case, the web 1b of the H-shaped steel of the base material 1 and the plate 221 are parallel to each other, and the inflatable injector 22 is placed with the injection needle 222 facing the asbestos-containing material 2 of the web 1b. Deploy. At this time, the expansion member 223 in a reduced state and the existing wall 4 are in a state of facing each other with a predetermined interval.

  Then, as shown in FIG. 15B, when air or the like is supplied to the expansion member 223 by an expansion means (not shown), the expansion member 223 comes into contact with the existing wall 4 and this existing wall 4 is made a reaction force. The plurality of injection needles 222 together with the plate 221 are press-fitted into the asbestos-containing material 2. As a result, when the tips of the plurality of injection needles 222 reach the substrate 1 (web 1b), the acid solution 3 is supplied to the flow path 220 and the acid solution 3 is injected from the tip of the injection needle 222 onto the adhesion surface T. can do.

(Seventh Modification)
In the seventh modified example, the asbestos-containing material 2 is removed using a hollow drill type injection tool 23 (injection jig) shown in FIG. 17 instead of the syringe 10 (see FIG. 1) of the first embodiment described above. It is.
That is, the hollow drill type injector 23 includes a hollow drill 231, a hollow drill bit 232 attached to the tip of the hollow drill 231, a ball plunger 233 provided at the tip of the hollow drill bit 232, a hollow drill 231, a hollow And an injection pipe 234 for the acidic liquid 3 provided in communication with the respective hollow portions of the drill bit 232 and the ball plunger 233. In a normal state, that is, in a state where the tip 233a of the ball plunger 233 is not pressed, the acidic liquid 3 in the injection pipe 234 is prevented from flowing out.
In the present hollow drill injection tool 23, the asbestos-containing material 2 is drilled until the substrate 1 is reached by rotating the hollow drill 231 and the hollow drill bit 232. When the ball plunger 233 reaches the substrate 1 and the tip 233a is pressed, the acidic liquid 3 is injected from the tip 233a toward the adhesion surface T (see FIG. 1).

(Eighth modification)
In the eighth modification, the asbestos-containing material 2 is removed using a capsule-type injection tool 24 (injection jig) shown in FIG. 18 instead of the syringe 10 (see FIG. 1) of the first embodiment described above. is there.
In other words, the capsule injection device 24 is a needle-shaped acidic liquid capsule having a needle-shaped opener at the tip of a cylindrical container body 241 that stores the acidic liquid 3 in a pressurized state. That is, a recess 241 a is formed at the tip of the container body 241, and the partition 241 b on the bottom of the recess 241 a, that is, the tip of the container body 241 is provided. A needle 243 provided integrally with the cap 242 is fitted in the recess 241a. The cap 242 is provided with a flow path 244 that communicates from the cap tip 242a to the partition wall 241b along the central axis of the container body 241 in a state of being engaged with the recess 241a. And the blade edge | tip part 243a of the needle 243 is arrange | positioned toward the partition 241b.

As shown in FIG. 19, when the capsule injection device 24 is driven into the asbestos-containing material 2 by a driving means using compressed air or the like, the capsule tip reaches the surface 1a of the substrate 1 and stops at that position. To do. At this time, the cap 242 is pressed toward the container main body 241 side. At this time, the blade edge portion 243a of the needle 243 integrated with the cap 242 breaks through the partition wall 241b of the container main body 241, and the container main body 241 is opened. The Specifically, the cap 242 stops at a position where the rear end 242b (the end on the container main body 241 side) abuts on the front end surface 241c of the container main body 241.
As a result, the acidic liquid 3 that has been press-fitted into the container body 241 is ejected from the cap tip 242 a through the flow path 244, and the acidic liquid 3 adheres to the adhesion surface T between the asbestos-containing material 2 and the substrate 1. Will penetrate and spread around.

  The shape of the flow path 244 in the cap 242 is limited to that along the central axis as shown in FIG. 18, that is, the outlet of the acidic liquid 3 downstream of the flow path 244 is the cap tip 242a. There is no. For example, as shown in FIG. 20, the cap 242 may be provided with a jet port 242 b for the acidic liquid 3 on the side surface.

(Ninth Modification)
The ninth modification shown in FIG. 21 removes the asbestos-containing material 2 by using a T-bar-shaped injection tool 25 (injection jig) instead of the syringe 10 (see FIG. 1) of the first embodiment described above. In the second modified example described above, the injection scraper 18 (see FIG. 7) is replaced with a T-bar injection tool 25. Since the chemical tank 13, the liquid feed pipe 14, and the pressure feed pump 15 shown in FIG. 21 have the same configuration as that of the second modified example, detailed description thereof is omitted here.
That is, the T bar-shaped injection tool 25 includes a drill body 251 and a T bar 252 that is rotatably attached to the drill body 251. The T bar 252 includes a rotating shaft 253 and a tip bar 254 having a plurality of openings 254 a that extend at the tip of the rotating shaft 253 in a direction orthogonal to the rotating shaft direction and eject the acidic liquid 3.

  As shown in FIG. 21 and FIG. 22 (a), the asbestos-containing material removal method using the T-bar-shaped injection tool 25 is such that the tip bar 254 of the T-bar 252 is placed on the surface 1a of the substrate 1 in accordance with the cut K1. After the insertion until reaching, the acidic liquid 3 is sprayed toward the adhesion surface T from the opening 254a of the tip bar 254. At this time, as shown in FIG. 22B, it is possible to inject the acidic liquid 3 while rotating the tip bar 254 along the attachment surface T together with the rotating shaft 253, thereby effectively and over a wide range. The acidic liquid 3 can be injected into the water.

(10th modification)
In the tenth modification shown in FIG. 23, the asbestos-containing material 2 is removed by a robot arm 26 having an injection jig 261 at the tip.
The injection jig 261 of the robot arm 26 is provided with a six-axis force / torque sensor 262 so that compliance control can be performed.
In addition, as shown in FIG. 24, the robot arm 26 may be provided with a protective sheet 27 that covers all of the portions except the injection jig 261.

As mentioned above, although embodiment of the removal method of the asbestos containing material by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the present embodiment, the cut K1 provided in the asbestos-containing material 2 has a mesh shape, but the present invention is not limited thereto, and may be a parallel or grid cut.
In addition, the type, the injection amount, the injection position, the injection interval, etc. of the acidic liquid 3 are appropriately determined according to the conditions such as the material of the asbestos-containing material, the thickness dimension of the spraying material, the material of the base material, etc. Can be set.

1 base material 1a surface 1a
2 Asbestos-containing material 2a Surface 3 Acidic solution 10 Syringe (injection jig)
DESCRIPTION OF SYMBOLS 11 Pressure injection gun 13 Chemical tank 14 Liquid feed pipe 15 Pressure feed pump 17 Injection gun (injection jig)
18 Injection scraper (injection jig)
19, 20 Comb type injection tool (injection jig)
21 Double nail injection tool (injection jig)
22 Inflatable injector (injection jig)
23 Hollow drill type injection tool (injection jig)
24 Capsule type injection device (injection jig)
25 T-bar shaped injection tool (injection jig)
26 Robot arm 27 Protection sheet K1 Cut T Adhering surface

Claims (1)

A method for removing an asbestos-containing material coated on the surface of a substrate,
Providing a break that reaches the base material in the asbestos-containing material;
Using a pressure injection gun capable of injecting acidic liquid, injecting from the surface of the asbestos-containing material into the cut, and applying pressure to infiltrate the acidic liquid;
A method for removing asbestos-containing material, comprising: