JP2012007306A - Positioning member and removal method of asbestos-containing spray material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a positioning member capable of surely performing desired positioning to an object and a removal method of an asbestos-containing spray material capable of improving work efficiency.SOLUTION: A positioning member 5 is for performing positioning at a desired interval to an object. In the positioning member 5, a plurality of rectangular meshes 51 are formed within a plane, and one mesh is formed in a square shape comprising a linear body 52 having an equal spring constant.

Description

  The present invention relates to a positioning member and a method for removing an asbestos-containing spray material.

  Conventionally, asbestos-containing spray materials such as sprayed asbestos materials and asbestos-containing spray rock wool are removed by roughing with tools such as keren rods, and then, for example, residual deposits mainly composed of cement components using a brush etc. The work to peel off and polish. 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 was difficult to use an asbestos removal device for the base material coated with an asbestos-containing spray 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.

  In order to solve such a problem, the inventor of the present application has already invented a technique for injecting and dissolving a chemical solution (acidic solution) into an asbestos-containing spray material and allowing the asbestos-containing spray material to fall naturally. Yes. However, if the chemical solution is not evenly injected into the asbestos-containing spray material, there is a risk that the asbestos-containing spray material will not fall completely spontaneously. In such a case, the chemical solution must be injected again, and the work efficiency There was a limit to improvement.

  Then, this invention is made | formed in view of the said situation, The removal of the positioning member which can perform desired positioning reliably with respect to a target object, and the asbestos containing spraying material which can improve work efficiency A method is provided.

  In order to solve the above problems, the invention described in claim 1 is a positioning member for positioning at a desired interval with respect to an object, and a plurality of rectangular meshes are formed in a plane. One mesh is formed in a square shape composed of linear bodies having an equal spring constant.

  According to the invention described in claim 1, since each side constituting the square mesh is constituted by a linear body having an equal spring constant, the end of the positioning member is applied with an equal tension. By simply holding it, it is possible to create a state that is substantially the same as the state in which the object is inked. That is, since the center points of the meshes and the intersections of the sides are arranged at equal intervals, desired positioning can be reliably performed on the target object.

  Invention of Claim 2 is the removal method of the asbestos containing spraying material sprayed on the surface of the base material, Comprising: The process of arrange | positioning the positioning member of Claim 1 on the surface of the said asbestos containing spraying material A step of holding the end portion of the positioning member in a state where a uniform tension is applied; and a predetermined position indicated by the positioning member as a chemical solution injection portion, and the asbestos-containing spray disposed in the chemical solution injection portion And a step of injecting an acidic liquid into the material.

  According to the invention described in claim 2, the asbestos-containing spray is obtained by holding the end portion of the positioning member on the surface of the asbestos-containing spray material sprayed on the surface of the base material in a state where an equal tension is applied. It is possible to create a state that is almost the same as the state of marking the attachment material. Then, the central point of the mesh, the intersection of each side, etc. can be used as the chemical solution injection part, and the acidic solution can be injected into the chemical solution injection part at substantially equal intervals by injecting the acidic solution into the chemical solution injection part. it can. Therefore, the asbestos-containing spraying material is dissolved by the acidic liquid, and all asbestos-containing spraying materials can be easily dropped naturally from the surface of the base material, so that the work efficiency of asbestos removal can be improved.

  The invention described in claim 3 is characterized in that the acidic liquid is injected in the vicinity of an adhesive surface between the asbestos-containing spray material and the base material.

  According to the invention described in claim 3, the asbestos-containing spray material is decomposed by the acid liquid at the contact surface with the base material by injecting the acidic liquid in the vicinity of the bonding surface between the base material and the asbestos-containing spray material. The asbestos-containing spray material can be peeled off from the base material, and can be dropped naturally. In other words, it is possible to remove the asbestos-containing spraying material in a state with almost no residue on the base material by injecting an acidic liquid in the vicinity of the adhesive surface between the base material and the asbestos-containing spraying material, A conventional removal robot equipped with a large removal device and a manipulator is not required, and a laborious work such as polishing after roughing with a keren rod is also unnecessary. Therefore, the work efficiency of asbestos removal can be improved.

  The invention described in claim 4 is characterized in that the acidic liquid is injected into the asbestos-containing spray material using a hand-held injection tool.

  According to the invention described in claim 4, the asbestos-containing spray material is applied to the base material by a simple operation of injecting the acidic liquid into the asbestos-containing spray material using a hand-held small and lightweight injection tool. On the other hand, it can be removed with almost no residue left. Therefore, even in a narrow work space, the removal work can be performed easily and in a short time by human power, and the work efficiency of asbestos removal can be improved.

According to the positioning member of the present invention, since each side constituting the square mesh is configured by a linear body having an equal spring constant, the end of the positioning member is held in a state where a uniform tension is applied. With this, it is possible to create a state that is substantially the same as the state in which the object is marked. That is, since the center points of the meshes and the intersections of the sides are arranged at equal intervals, desired positioning can be reliably performed on the target object.
Moreover, according to the removal method of the asbestos containing spraying material of this invention, the edge part of a positioning member is hold | maintained in the state which applied the equal tension | tensile_strength to the surface of the asbestos containing spraying material sprayed on the surface of the base material. As a result, it is possible to create a state that is substantially the same as the state of inking the asbestos-containing spray material. Then, the central point of the mesh, the intersection of each side, etc. can be used as the chemical solution injection part, and the acidic solution can be injected into the chemical solution injection part at substantially equal intervals by injecting the acidic solution into the chemical solution injection part. it can. Therefore, the asbestos-containing spraying material is dissolved by the acidic liquid, and all asbestos-containing spraying materials can be easily dropped naturally from the surface of the base material, so that the work efficiency of asbestos removal can be improved.

It is a figure for demonstrating schematic structure of the removal method of the asbestos containing spraying material in embodiment of this invention. It is an enlarged view of the syringe in embodiment of this invention. It is a figure which shows the front-end | tip part of the injection needle in embodiment of this invention. It is a top view of the positioning member in the embodiment of the present invention. It is a figure (1) which shows the removal work state of the spraying material in embodiment of this invention. It is figure (2) which shows the removal operation state of the spraying material in embodiment of this invention, and is a top view which shows the state by which the positioning member was distribute | arranged to the surface of the spraying material.

Next, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the method for removing asbestos-containing spray material of the present embodiment is applied to the surface of a base material 1 composed of a reinforced concrete slab 1A such as a building or an H-shaped steel material 1B that supports the slab 1A from below. The present invention is applied to construction for removing the coated asbestos-containing spray material (hereinafter simply referred to as “spray material”) 2. The base material 1 is in a state where the lower surface 1a of the slab 1A is sprayed together with the H-type steel material 1B by the spray material 2 having a spray thickness of about 25 to 60 mm, for example.

  Examples of the spray material 2 containing asbestos include a spray asbestos material and an asbestos-containing spray rock wool. And the intensity | strength of the spraying material 2 is a material intensity | strength of the grade which can normally insert the injection needle 42 of the syringe 4 mentioned later.

  The spraying material 2 is removed by injecting the acidic liquid 3 in the vicinity of the adhesive surface T between the spraying material 2 and the base material 1 using a hand-held syringe 4 (injection tool). In this method, the acid solution 3 is reacted and dissolved, dropped naturally while being peeled, and the sprayed material 2 that has dropped is removed.

  Examples of the acidic liquid 3 injected in the vicinity of the bonding 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 the spraying material 2 and dissolving it, and is used for separating the base material 1 by peeling off the base material 1 by being injected in the vicinity of the adhesive surface T. Depending on the conditions such as the material of the spray material 2, the thickness of the spray material 2 and the material of the base material 1, the PH value is adjusted to any value of about 1 to 4, for example.

  As shown in FIG. 2, the syringe 4 for injecting the acidic liquid 3 into the adhesive surface T is capable of sucking and storing an appropriate amount of the acidic liquid 3, and is a well-known handheld device including a main body 41 and an injection needle 42. The one of the form is adopted.

  As shown in FIG. 3, the injection needle 42 in the syringe 4 is formed with a lateral hole 42b in which the needle hole of the distal end portion 42a is opened sideways. That is, since the needle hole of the injection needle 42 is opened sideways, when the injection needle 42 is inserted into the spraying material 2, the spraying material 2 enters the needle hole to cause clogging, and the injection of the acidic liquid 3 is performed. It has a structure that can prevent problems such as obstruction.

  Subsequently, FIG. 4 is a plan view of a positioning member used in the present embodiment. As shown in FIG. 4, the positioning member 5 is a member formed of, for example, elastic rubber and the like, and is a member for positioning at a desired interval with respect to the spray material (target object) 2. A plurality of meshes 51 are formed in the plane. One mesh 51 is formed in a square shape formed by linear bodies 52 each having a spring constant k. That is, one mesh 51 is composed of a square composed of linear bodies 52 each having an equal spring constant. In addition, the connection part of the adjacent linear bodies 52 and 52 is called the contact 53.

Next, a specific method for removing the spray material 2 will be described.
First, as shown in FIG. 5, for example, a scattering inhibitor 6 such as ASTECTOR S (registered trademark) is sprayed on the surface 2 a of the spray material 2 to be removed.

  Subsequently, as shown in FIGS. 5 and 6, the positioning member 5 is arranged on the surface 2 a of the spray material 2, the peripheral portion of the positioning member 5 is pulled with a predetermined force, and each linear body 52 of the positioning member 5 is drawn. Is held under a desired tension. By pulling the peripheral edge of the positioning member 5 with a substantially equal force, each linear body 52 of the mesh 51 is also pulled with a substantially equal force, and the mesh 51 is held in a square state in which the length L of each side is substantially equal. The

  Subsequently, the syringe 4 that has sucked the acidic solution 3 is used, and the tip 42a (lateral hole 42b) of the injection needle 42 is inserted so as to be at a desired injection position (near the adhesive surface T), and the acidic solution 3 is injected. To do. The injection by the syringe 4 is performed manually. Since the positioning member 5 is disposed on the surface 2a of the spray material 2 at this time, for example, by setting the position of the contact 53 of the positioning member 5 as the injection position of the acidic liquid 3, the acidic liquid 3 is blown. It will inject | pour uniformly with a substantially equal space | interval with respect to the attachment material 2. FIG. Note that the center point of the mesh 51 may be set as the injection position of the acidic liquid 3. Further, in places where the shape of the base material 1 such as the high-strength bolt portion 1C or the H-shaped steel material 1B is complicated, the number of injection locations is increased compared to the location where the shape is flat, and the injection interval is reduced and concentrated. By injecting into the base material, the acidic liquid 3 may be permeated over the entire adhesive surface of the part, and the spray material 2 may be peeled off from the base material 1. At this time, another positioning member may be arranged on a surface (vertical surface or the like) different from the flat portion (bonding surface T1 between the slab 1A and the spray material 2) for positioning.

  Here, the symbol R1 indicates the first injection region in the flat portion (bonding surface T1 between the slab 1A and the spray material 2), and the symbol R2 indicates the first complicated shape portion (the high-strength bolt portion 1C and the spray material). 2 indicates the second injection region in the adhesive surface T2), and the symbol R3 indicates the third injection region in the second complicated shape portion (adhesion surface T3 between the H-shaped steel 1B and the spray material 2). . As shown in FIG. 5, in the present embodiment, in the first injection region (flat portion) R1, the acidic liquid 3 is injected into the contact point 53 of the positioning member 5, and the first complicated shape portion R2 and the second complicated portion R2 are injected. The simple shape portion R3 is configured to inject the acidic liquid 3 into a plurality of locations in one mesh 51 of the positioning member 5.

  By injecting the acidic liquid 3 in a desired position in a balanced manner in this way, the spraying material 2 is decomposed and dissolved by the acid on the adhesive surface T with the base material 1, whereby the spraying material 2 becomes the base material 1. , And then falls naturally, and the removal work of the spray material 2 is completed. The positioning member 5 may be removed after injecting the acidic liquid 3 into the spray material 2. The surface 1a (contact surface with the spraying material 2) of the base material 1 at this time is a state in which the spraying material 2 hardly peels and remains because the spraying material 2 is peeled off due to dissolution. It becomes. The dropped spray material 2 can be removed by a desired collecting means. Here, in this embodiment, since the scattering inhibitor 6 is sprayed on the surface 2a of the spraying material 2 in advance, the asbestos scattering that occurs when the spraying material 2 peels and falls can be suppressed.

  According to such a removal method, after positioning with the positioning member 5, the acidic liquid 3 can be evenly injected into the spraying material 2 by a simple operation of injecting the acidic liquid 3. 2 can be removed with substantially no adhesion remaining on the substrate 1. That is, a conventional removal robot equipped with a large removal device and a manipulator is not required, and a troublesome work such as polishing after roughing with a keren rod is also unnecessary. Therefore, even in a narrow work space, the removal work can be performed easily and in a short time by human power. Moreover, even if it is a case where the base material 1 is comprised from complicated shapes, such as the H-type steel material 1B and the high strength volt | bolt 1C as above-mentioned, it removes in the state with almost no adhesion of the spraying material 2. Can do.

  As described above, in the method for removing an asbestos-containing spray material according to the present embodiment, the spray material 2 and the base material 1 are combined with the base material 1 by a simple and trouble-free operation such as injecting the acidic liquid 3 using the handheld syringe 4. It can be dissolved and peeled off at the contact surface T, and even if the base material 1 has a complicated shape, it can be reliably removed with almost no adhesion remaining, and the working time can be reduced. . In addition, since a large removal device or the like is not used, the removal work can be performed even in a narrow work space.

  And according to the removal method of the asbestos containing spraying material by this embodiment, the positioning member 5 is used, and this positioning member 5 is a linear body in which each side which comprises the square mesh 51 has an equal spring constant. 52, the positioning member 5 is held in a state where the peripheral edge (end portion) of the positioning member 5 is applied with an equal tension, so that the state substantially the same as the state where the ink is applied to the spraying material 2 is obtained. Can be easily produced. That is, since the contact points 53 that are the intersections of the center points and the sides of the meshes 51 are arranged at equal intervals, it is possible to reliably perform desired positioning with respect to the spray material 2. By using this positioning member 5, the acidic liquid 3 can be injected into the spray material 2 at substantially equal intervals. Therefore, the spraying material 2 is dissolved by the acidic liquid 3, and all the spraying materials 2 can be naturally dropped from the surface of the base material 1 and the work efficiency of asbestos removal can be improved.

  The present invention is not limited to the above-described embodiment, and includes various modifications made to the above-described embodiment without departing from the spirit of the present invention. That is, the specific structure and configuration described in the embodiment are merely examples, and can be changed as appropriate.

  For example, in the present embodiment, the syringe 4 is used, but the present invention is not limited to this. For example, the injection device is a piston-like injection device having a needle hole for injection, and the injection device supplies the acidic liquid 3. The thing of the structure connected with the front-end | tip part of the hose connected to the container to accommodate may be sufficient. In short, it is only necessary to use an injection device that is lightweight and compact that can be held by hand, can be easily carried even in a narrow work space, and can be easily handled in the work space at the injection site. . When a syringe is used, it may be a syringe having a hole in the direction of the normal needle axis as well as the needle hole positioned laterally as in this embodiment.

Moreover, the kind of acidic liquid 3, injection amount, injection | pouring position, injection | pouring space | interval, etc. depend on conditions, such as the property of the asbestos containing spraying material 2, the thickness dimension of the spraying material 2, and the material of a base material as mentioned above. It can be set accordingly. The injection position and injection interval of the acidic liquid 3 can be set by adjusting the tensile force of the positioning member 5.
Furthermore, the positioning member of the present embodiment can be widely used not only for removing the spray material 2 described above, but also for positioning the target object at substantially equal intervals in a plane.

  DESCRIPTION OF SYMBOLS 1 ... Base material 2 ... Spraying material (object, asbestos containing spraying material) 3 ... Acidic solution 4 ... Syringe (injection tool) 5 ... Positioning member 51 ... Mesh 52 ... Linear body T ... Adhesive surface

Claims (4)

A positioning member for positioning at a desired interval with respect to an object,
A plurality of rectangular meshes are formed in the plane,
One said mesh is formed in the square shape comprised by the linear body which has an equal spring constant, The positioning member characterized by the above-mentioned. A method for removing asbestos-containing spray material sprayed on the surface of a substrate,
Disposing the positioning member according to claim 1 on the surface of the asbestos-containing spray material;
Holding the end of the positioning member in a state of applying an equal tension;
And a step of injecting an acidic solution into the asbestos-containing spray material disposed in the chemical solution injection portion, with a predetermined position indicated by the positioning member as a chemical solution injection portion. Material removal method.   The method for removing an asbestos-containing spray material according to claim 2, wherein the acidic liquid is injected in the vicinity of an adhesive surface between the asbestos-containing spray material and the base material.   The said acidic liquid is inject | poured into the said asbestos containing spraying material using the injection tool which can be hand-held, The removal method of the asbestos containing spraying material of Claim 2 or 3 characterized by the above-mentioned.

Images