JP6482142B2 - Coating material peeling device - Google Patents

Description

  The present invention relates to a coating material peeling apparatus for peeling a coating material such as asbestos coated on a wall surface of a structure, for example, a concrete structure.

  Conventionally, as this type of coating material peeling apparatus, for example, a coating film peeling apparatus (1) described in Patent Document 1 is known. The coating film peeling apparatus (1) covers a sander blade (2) that peels a coating film while rotating, a disk sander (3) that is rotatably mounted with a sander blade (2), and a sander blade (2). Thus, a dust collecting cover (4) attached to the disc sander (3) and a dust collector (5) connected to the dust collecting cover (4) are provided. The sander blade (2) is composed of a disk-shaped substrate (41) and four chips (42) fixed to the peripheral edge of the surface of the substrate (41). A mounting hole (44) for mounting the sander blade (2) to the disc sander (3) is formed in the center of the substrate (41). In addition, six circular openings (through openings) (47), which are positioned around the mounting hole (44) and guide the grinding powder ground by the sander blade (2) to the dust collecting cover (4) side, are circumferential. Are formed at an equal pitch. The dust collecting cover (4) includes a cover main body (21) made of a transparent resin and the like, and a brush body (22) planted on the peripheral edge of the surface of the cover main body (21).

JP 2000-202777 A

However, in the above-described conventional coating film peeling apparatus (1), the ground grinding powder leaks to the outside through the gap of the brush body (22). May be harmed. In order to prevent this, if a cover without a gap is provided instead of the brush body (22), the suction amount of the dust collector (5) is reduced because the amount of outside air sucked is reduced. . Furthermore, if a cover without a gap is provided instead of the brush body (22), the inside of the dust collection cover (4) is depressurized, and the cover is adsorbed to the painted surface, so that the peeling work efficiency is reduced. New problems also arise.
That is, the conventional coating film peeling apparatus (1) has a total of 3 to prevent the grinding powder from leaking to the outside of the apparatus, to prevent the suction force from decreasing, and to prevent the cover from adsorbing to the painted surface. One purpose cannot be established.

  Accordingly, the present invention was created to solve the above-mentioned problems, and the peeled coating material is difficult to leak to the outside of the apparatus, and the suction force can be increased. An object of the present invention is to realize a coating material peeling apparatus that can prevent adsorption to the coating material.

(Invention according to Claim 1)
In order to achieve the above-mentioned object, in the invention according to claim 1 of the present application,
A coating material peeling device (2) for peeling a coating material applied to a structure and discharging the peeled coating material to a suction device (40),
A casing (2d) that can be held with one hand;
A disc-shaped rotating body (2n) which is provided at the front end of the casing (2d) and whose peripheral edge (2n1) of the lower surface rotates in parallel to the coating surface (B) coated with the coating material;
A recess (25) formed from the periphery (2n1) to the rotation center (P) of the rotating body (2n);
A plurality of windows (2p) formed in the rotating body (2n) along the rotation direction (F1) of the rotating body (2n);
A plurality of polishing members (30, 31) provided on the lower surface of the rotating body (2n) for polishing and removing the coating material;
A substantially disc-shaped first cover (2a1) covering the upper surface of the rotating body (2n);
A second cover (2a2) that is formed integrally with the first cover (2a1) and covers the outer peripheral surface of the rotating body (2n);
A substantially cylindrical third cover (22) supported by the first cover (2a1) and covering the outer peripheral surface of the second cover (2a2);
A plurality of support members (2f) for supporting the third cover (22) at a plurality of locations via the elastic member (2h) so as to be movable up and down on the first cover (2a1);
An air motor (2w) provided inside the casing (2d) for rotating the rotating body (2n);
When the rotating body (2n) is viewed from the lower surface, the rotating body (2n) is provided on the lower surface of the first cover (2a1) so as to be exposed from any of the plurality of windows (2p). Water (W) is supplied to the space (K) formed between the lower surface and the upper surface of the rotating body (2n), and a plurality of windows (2p) are opened at any time when the rotating body is rotating or stopped. A water supply port (2j) capable of supplying water (W) to the recess (25) via
Of the first cover (2a1), the first cover (2a1) is formed so as to penetrate the portion near the rear end of the coating material peeling device (2) and communicates with the space (K), and rotates from the water supply port (2j). The water (W) supplied to the lower surface of the body (2n) and the coating material peeled off from the painted surface (B) by the plurality of polishing members (30, 31) when the rotating body (2n) rotates are mixed. Discharge port (2v) for discharging the muddy water (M) to the suction device (40),
A gap formed along the outer peripheral surface of the second cover (2a2) between the outer peripheral surface of the second cover (2a2) and the inner peripheral surface of the third cover (22), and a suction device ( A first gap (23) for taking in outside air (A) when 40) is activated;
It is formed between the outer peripheral surface of the rotating body (2n) and the inner peripheral surface of the second cover (2a2), and is taken into the first gap (23) when the suction device (40) is operated. A second gap (26) for guiding outside air (A) to space (K);
One end is connected to the discharge port (2v), and includes a discharge pipe (2c) disposed on the upper surface of the first cover (2a1),
The lower end edge (2a4) of the second cover (2a2) is located at a position higher than the lower surfaces (30a, 31a) of the plurality of polishing members (30, 31),
The lower end edge (22c) of the third cover (22) has a plurality of polishing members (30) by the elastic force of the elastic member (2h) when the lower end edge (22c) is not pressed against the coating surface (B). , 31) is located below the lower surfaces (30a, 31a), and the lower edge (22c) is pressed against the painted surface (B) against the elastic force of the elastic member (2h). Sometimes it is configured to be able to rise to the same position as the lower surfaces (30a, 31a) of the plurality of polishing members (30, 31),
The discharge port (2v) is formed in a substantially elliptical shape having a short axis (b) extending in the front-rear direction of the coating material peeling apparatus (2) and a long axis (a) intersecting the short axis (b). And
Further, the center (P1) of the first cover (2a1) and the rotation center (P) of the rotating body (2n) exist on the same axis, and the center of the water supply port (2j) and the first cover (2a1) The angle (θ) formed by the line (L1) connecting the center (P1) and the line (L2) connecting the center of the discharge port (2v) and the center (P1) of the first cover (2a1). ) Is 180 degrees or more and less than 360 degrees when measured in the rotation direction (F1) of the rotating body (2n),
Furthermore, it has the technical means that it is comprised so that the casing (2d) can be held with one hand and the coating material can be peeled off.
Note that “supply” in the “water supply port for supplying water” includes a supply mode of jetting water, and does not mean the strength of jetting.

(Invention according to Claim 2)
In the invention which concerns on Claim 2, in the coating material peeling apparatus (1) of Claim 1,
A first planar portion (2a3) in which a part of the peripheral surface of the second cover (2a2) is formed in a planar shape;
A part of the peripheral surface of the third cover (22) is formed in a planar shape, and includes a second plane part (22b) parallel to the first plane part (2a3),
Among the plurality of polishing members (30, 31), a part of the polishing surface (30b) of the predetermined number of polishing members (30) protrudes outward from the outer periphery of the rotating body (2n),
Technically, the outer periphery of the rotating body (2n) is exposed from the gap (23a) formed between the first and second plane portions (2a3, 22b) in the first gap (23). Have means.

(Invention according to claim 3)
In the invention which concerns on Claim 3, in the coating material peeling apparatus (1) of Claim 1 or Claim 2,
The water supply port (2j) sprays water (W) through any one of the plurality of windows (2p) when the rotating body (2n) is rotating or stopped, and the polishing member (30.31). ) Has a technical means of having a function of cleaning the portion (G) from which the coating material has been removed.

(Invention of Claim 4)
In the invention according to claim 4, in the coating material peeling device (2) according to any one of claims 1 to 3, the suction device (40) is activated in the first cover (2a1). There is a technical means that an intake hole (2a5) for taking outside air (A) into the space (K) is sometimes formed.

(Invention according to claim 5)
In the invention which concerns on Claim 5, in the coating material peeling apparatus (1) of any one of Claim 1 thru | or 4,
The technical means is provided with a water amount adjusting device (21) for adjusting the amount of water supplied from the water supply port (2j).

(Invention of Claim 6)
In the invention which concerns on Claim 6, In the coating material peeling apparatus (1) of any one of Claim 1 thru | or 5,
On the outer peripheral surface of the third cover (22), there is a technical means that a soft fourth cover (24) covering the outer peripheral surface is detachably attached.

(Invention of Claim 7)
In the invention according to claim 7, in the coating material peeling apparatus (1) according to any one of claims 1 to 6,
In a state where the lower end edge (22c) of the third cover (22) is in contact with the painted surface (B), it is between the lower end edge (2a4) of the second cover (2a2) and the painted surface. Is formed with a third gap (S),
The first and third gaps (23, S) are 0.8 mm or more and 1.2 mm or less, respectively, and the height (H) of the inner peripheral surface of the second cover is 20 mm or more and 30 mm or less. It is characterized by being.

  In addition, the code | symbol in each said parenthesis shows the correspondence with the specific means as described in embodiment mentioned later.

(Effect of the invention according to claim 1)
(1) The coating material peeling apparatus of the invention which concerns on Claim 1 is provided with the substantially cylindrical 3rd cover which covers the outer peripheral surface of a 2nd cover. And the lower end edge of the third cover is located below the lower surfaces of the plurality of polishing members by the elastic force of the elastic member when the lower end edge is not pressed against the paint surface, and When the lower end edge is pressed against the coating surface against the elastic force of the elastic member, it is configured to be able to rise to the same position as the lower surfaces of the plurality of polishing members.
In other words, the lower edge of the third cover rises to the same position as the lower surfaces of the plurality of polishing members when the coating material is being peeled off. It is difficult to leak outward from the third cover.

  Further, since the third cover is supported by the first cover at a plurality of locations via the elastic member so as to be movable up and down, the rotating body is in the direction of the rotation axis when the coating material is being peeled off. Even when it moves up and down, the state where the lower edge of the third cover is in contact with the painted surface is maintained, so it is difficult to form a gap between the painted surface and the lower edge of the third cover. The peeled coating material is unlikely to leak outward from the third cover.

Further, when the lower edge of the third cover is not pressed against the paint surface, the third cover is positioned below the lower surfaces of the plurality of polishing members due to the elastic force of the elastic member. When the rotating body is lifted from the painted surface during the operation, the lower end edge of the third cover can be brought into contact with the painted surface.
That is, even when the rotating body is lifted from the painted surface, the peeled coating material is unlikely to leak outward from the third cover.

Furthermore, the water supply port provided in the coating material peeling apparatus of the invention according to claim 1 is provided on the lower surface of the first cover in a state where it can be exposed from any of the plurality of windows when the rotating body is viewed from the lower surface. Water is supplied to a space formed between the lower surface of the first cover and the upper surface of the rotating body, and the lower surface of the rotating body is passed through a plurality of windows at any time when the rotating body is rotating or stopped. It is possible to supply water to the recesses.
That is, since the water supplied from the water supply port can wet the surface from which the coating material has been peeled off, scattering of the peeled coating material can be suppressed. Moreover, the water supplied from the water supply port and the peeled coating material can be mixed to form a mud.
Furthermore, since polishing is performed while supplying water, the peeled powdery coating material does not remain on the surface from which the coating material has been removed (hereinafter referred to as the removal surface) or in the apparatus.

  Therefore, if the coating material peeling apparatus of the invention according to claim 1 is carried out, the polished coating material becomes powdery and is scattered into the air during the polishing operation, or the powdery coating material remaining on the removal surface is present. Since it does not float in the air, there is no risk that the operator may injure health by sucking the powdery coating material.

(2) Moreover, the coating material peeling apparatus of the invention which concerns on Claim 1 is penetrated and formed in the location near the rear end of the said coating material peeling apparatus among the 1st covers, and the discharge port connected with the space is provided. Prepare. Furthermore, it is a gap formed along the outer peripheral surface of the second cover between the outer peripheral surface of the second cover and the inner peripheral surface of the third cover, and takes in outside air when the suction device is operated. Formed between the outer peripheral surface of the rotating body and the inner peripheral surface of the second cover, and the outside air taken into the first clearance when the suction device is operated into the space. A second gap for guiding.
That is, when the suction device is activated, the outside air can be guided to the space through the first and second gaps, so that the air flow from the space to the suction device through the discharge port is improved. Can be increased.
(3) Moreover, since the space communicates with the outside of the apparatus due to the first and second gaps, the interior of the space is not extremely depressurized, so the second cover is not attracted to the painted surface, and the peeling work efficiency Can also be increased.
(4) Furthermore, when the suction device is activated, the gap between the second cover and the third cover is in an optimum negative pressure state, so that a large amount of outside air can be introduced into the space. Can be prevented from being discharged to the outside by the rotational force of the internal rotating body.

(5) Furthermore, the discharge port of the coating material peeling apparatus according to the first aspect of the present invention is formed through the portion of the first cover near the rear end of the coating material peeling apparatus. It is formed in a substantially elliptical shape having a short axis extending in the front-rear direction of the apparatus and a long axis intersecting with the short axis. In addition, the center of the first cover and the rotation center of the rotating body exist on the same axis, a line connecting the center of the water supply port and the center of the first cover, the short axis and the long axis of the discharge port The angle formed by the line connecting the intersection of the first cover and the center of the first cover is 180 degrees or more and less than 360 degrees when measured in the rotation direction of the rotating body.
That is, even when working in a posture in which the front end of the coating material peeling device is directed upward and the rear end is directed downward with respect to a vertical painted surface, the coating material that has been separated from the water supplied from the water supply port Can be efficiently discharged from the discharge port to the suction device.

(6) Furthermore, since the frictional heat of each polishing member can be lowered by the water supplied from the water supply port to the lower surface of the rotating body, the coating material melted by the frictional heat adheres to the polishing member, and the polishing ability decreases. Can be suppressed.
(7) Furthermore, since each polishing member can be cooled by the water supplied from the water supply port to the painted surface, the life of each polishing member can be extended.
(8) Furthermore, since the foreign material such as the coating material and concrete particles entering the inside of the polishing flaw can be washed away by the water supplied from the water supply port to the lower surface of the rotating body, Since there is no material left, the worker can work safely without fear of harming his health. In addition, there is no risk of adverse effects such as uneven coating when new coating is performed.
(9) Furthermore, since the coating material can be peeled by holding the casing with one hand, the workability when the coating material is peeled off can be improved, and the work load can be improved. Can also be reduced.
(10) Furthermore, since the rotating body is rotated by the air motor, there is no risk of electric shock due to water entering the apparatus during work unlike the apparatus having a structure in which the rotating body is rotated by the electric motor.

(Effect of the invention according to claim 2)
In the coating material peeling apparatus of the invention according to claim 2, a part of the peripheral surface of the second cover is formed in a planar shape, and a part of the peripheral surface of the third cover is planar. And a second plane part parallel to the first plane part. Further, among the plurality of polishing members, a part of the polishing surface of a predetermined number of polishing members protrudes outward from the outer periphery of the rotating body. Further, between the first and second flat portions of the gap formed along the outer peripheral surface of the second cover between the outer peripheral surface of the second cover and the inner peripheral surface of the third cover. The outer periphery of the rotating body is exposed from the formed gap.
That is, the outer periphery of the rotating body is exposed from the gap formed between the first and second flat portions, and the coating material is peeled off by the polishing surface of the polishing member protruding outward from the outer periphery. can do.
Therefore, when there are convex portions or corner portions on the painted surface, the outer periphery of the rotating body exposed from the gap is applied to the convex portions or corner portions, so that the convex portions or corner portions are coated. The applied coating material can be peeled off.

(Effect of the invention according to claim 3)
The water supply port provided in the coating material peeling apparatus of the invention according to claim 3 sprays water through any of the plurality of windows at any time when the rotating body is rotating or stopped, and is applied by the polishing member. It has a function of cleaning the part from which the material is removed.
Therefore, it is possible to immediately wash the part from which the coating material has been removed, whether during the coating material peeling work or when the work is finished, and separately remove it by connecting a hose to a water source. Since it is not necessary to clean the surface, it is possible to increase the cleaning work efficiency of the removal surface. In addition, since there is no risk of the operator sucking the polished coating material, it is safe and the polished coating material does not scatter, so there is no need for curing to isolate the place where the coating material is peeled off. It is.
In addition, foreign materials such as coating materials and concrete grains that have entered the inside of the polishing scratches can be washed away, which may cause adverse effects such as uneven coating when new coating is applied to the surface from which the coating material has been peeled off. There is no.

(Effect of the invention according to claim 4)
The first cover provided in the coating material peeling apparatus of the invention according to claim 4 is formed with a suction hole through which the outside air is taken into the space when the suction device is operated. Since the air flow can be further improved by increasing the amount of air to reach the apparatus, the suction force can be further increased.

(Effect of the invention according to claim 5)
Since the coating material peeling apparatus of the invention which concerns on Claim 5 is equipped with the water amount adjusting device which adjusts the amount of water supplied to the lower surface of a rotary body from a water supply port, it goes to a water source whenever it needs to adjust the amount of water, and water amount is reduced. Since there is no need to adjust, the efficiency of adjusting the amount of water can be increased.
In addition, when the coating material is peeled off, water can be saved by reducing the amount of water. Further, when performing the cleaning operation on the removal surface, the cleaning operation efficiency can be increased by increasing the amount of water.

(Effect of the invention according to claim 6)
Since the soft 4th cover which covers the outer peripheral surface is detachably attached to the outer peripheral surface of the 3rd cover with which the coating material peeling apparatus of the invention which concerns on Claim 6 is equipped, the peeling operation | work of a coating material is carried out. Since the vibration generated when performing can be absorbed by the fourth cover, the burden on the operator can be reduced.
Moreover, since the fourth cover is soft, there is no possibility of damaging the structure even when the outer peripheral surface of the fourth cover collides with the structure.
Furthermore, since the fourth cover is soft, it has excellent adhesion to the painted surface of the coating material, so even if there are minute irregularities on the painted surface, the irregularities and the fourth cover Therefore, it is possible to reliably prevent the peeled coating material from scattering from the inside of the apparatus.

(Effect of the invention according to claim 7)
In the invention which concerns on Claim 7, in the state which the lower end of the 3rd cover contact | abutted to the coating surface, the 3rd clearance gap is formed between the 2nd cover and the coating surface, and the 1st and 3rd Since the gaps are 0.8 mm or more and 1.2 mm or less, respectively, the outside air can be efficiently guided to the space through the first and third gaps when the suction device is operated.
Therefore, the air flow from the space to the suction device through the discharge port can be further improved, so that the suction force can be further increased.
In addition, since the negative pressure in the space does not become excessively high when the suction device is activated, there is no possibility that the coating material peeling device will be adsorbed on the coating surface and the coating material peeling operation will be difficult. That is, by setting the first and third gaps to be 0.8 mm or more and 1.2 mm or less, respectively, when performing the coating material peeling operation, the coating material peeling device does not adsorb to the coating surface, and The suction force of the peeled coating material can be increased.
Further, since the height of the inner peripheral surface of the second cover is not less than 20 mm and not more than 30 mm, a sufficient volume in the space can be secured while increasing the suction efficiency, so that the coating material circulating in the space is the first It is also possible to prevent leakage from the gap between the two.

It is a top view of the coating material peeling apparatus which concerns on embodiment of this invention. It is a front view of the coating material peeling apparatus shown in FIG. It is a bottom view of the coating material peeling apparatus shown in FIG. It is a bottom view which shows the state which removed the rotary body from the coating material peeling apparatus shown in FIG. It is a longitudinal cross-sectional view around the rotary body of the coating material peeling apparatus shown in FIG. It is an enlarged view of the rotary body shown in FIG. (A) is an enlarged side view of the polishing member 31, (b) is an enlarged front view, (c) is an enlarged plan view, (d) is an enlarged side view of the polishing member 30, (e) is an enlarged front view, (f) ) Is an enlarged plan view. It is explanatory drawing which shows typically the structure of a peeling coating material collection | recovery system. It is explanatory drawing which shows typically a mode that a coating material peeling apparatus peels the coating material coated on the coating surface. It is explanatory drawing which shows typically the other structure of a peeling coating material collection | recovery system. It is explanatory drawing which shows the state which took out the peeling coating material container from the filtration tank.

[Structure of coating material peeling device]
The structure of the coating material peeling apparatus according to the embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a plan view of a coating material peeling apparatus according to this embodiment. FIG. 2 is a front view of the coating material peeling apparatus shown in FIG. FIG. 3 is a bottom view of the coating material peeling apparatus shown in FIG. 4 is a bottom view showing a state in which a rotating body is removed from the coating material peeling apparatus shown in FIG. FIG. 5 is a longitudinal sectional view around the rotating body of the coating material peeling apparatus shown in FIG. 6 is an enlarged view of the rotating body shown in FIG. 7 (a) is an enlarged side view of the polishing member 31, (b) is an enlarged front view, (c) is an enlarged plan view, (d) is an enlarged side view of the polishing member 30, and (e) is an enlarged front view, (F) is an enlarged plan view. FIG. 8 is an explanatory diagram schematically showing the configuration of the release coating material recovery system.
In the following description, the powdery coating material and concrete powder peeled off from the painted surface by each polishing member are referred to as peeling powder.

  As shown in FIGS. 1 to 3, the coating material peeling apparatus 2 includes a cylindrical casing 2d that can be held with one hand, and an air motor 2w (FIG. 2) is provided inside the casing 2d. It has been. A connector 2t for connecting an air supply hose 20 connected to the compressor 18 (FIG. 8) is provided at the rear end of the casing 2d. A valve (not shown) for switching between supply and shutoff of compressed air supplied from the compressor 18 via the connector 2t is built in between the connector 2t and the casing 2d. Between the connector 2t and the casing 2d, a cylindrical switch 2e for operating the start and stop of the air motor 2w is rotatably provided by opening and closing the valve.

  As shown in FIG. 2, a gear mechanism 2x connected to the air motor 2w is provided inside the front end of the casing 2d. A disc-shaped rotating body 2n (FIG. 6) connected to the gear mechanism 2x is rotatably attached to the lower front end of the casing 2d by a rotating shaft 2q. When the air motor 2w is driven, the rotating shaft 2q rotates through the gear mechanism 2x, and the rotating body 2n rotates.

  As shown in FIGS. 1 to 5, the upper surface of the rotating body 2n is covered with a metal first cover 2a1. As shown in FIG. 4, the first cover 2a1 is formed in a substantially disc shape. Air intake holes 2a5 are formed through the plurality of locations of the first cover 2a1. Each intake hole 2a5 is used for taking outside air A into a space K (FIG. 5) formed between the lower surface of the first cover 2a1 and the rotating body 2n when the suction device 40 (FIG. 8) is operated. Is. A substantially cylindrical rising portion (not shown) that rises from the upper surface of the first cover 2a1 is integrally formed at a portion surrounding the center of the first cover 2a1 in a circular shape. It encloses the periphery of the lower front end of the casing 2d. Further, as shown in FIGS. 1 and 2, a pair of bands 2k (only one band 2k is shown in the figure) is wound on the peripheral surface of the rising portion. Both ends are fastened by bolts and nuts 2m.

  The outer peripheral surface of the rotating body 2n is covered with a second cover 2a2 made of metal and having a substantially cylindrical shape. As shown in FIG. 5, the second cover 2a2 has a ring-shaped lower end edge 2a4 that hangs downward from the outer peripheral edge of the first cover 2a1, and is integrated with the first cover 2a1. Is formed. As shown in FIGS. 1 to 4, a part of the periphery of the first cover 2a1 is formed in a straight line, and the second cover 2a2 hanging downward from a part of the periphery formed in the straight line. The peripheral surface is a first planar portion 2a3 formed in a planar shape. Although not shown in each figure, when the 1st plane part 2a3 is seen from the front, a horizontally long rectangle is exhibited. In FIG. 1, the rotating body 2n appearing in FIG. 3 is omitted in order to make the first plan view 2a3 easier to see.

The outer peripheral surface of the second cover 2 a 2 is covered with a third cover 22. The 3rd cover 22 is formed in the substantially cylindrical shape, and the 2nd plane part 22b formed in planar shape is provided in a part of the surrounding surface. Although not shown in each figure, when the 2nd plane part 22b is seen from the front, a horizontally long rectangle is exhibited. The second flat surface portion 22b is parallel to the first flat surface portion 2a3 of the second cover 2a2. A first gap 23 is formed along the outer peripheral surface of the second cover 2 a 2 between the outer peripheral surface of the second cover 2 a 2 and the inner peripheral surface of the third cover 22. A part of the first gap 23 is a gap 23a formed between the first plane part 2a3 and the second plane part 22b. As shown in FIG. 3, the outer periphery of the rotating body 2n is exposed from the gap 23a. That is, the outer periphery of the rotating body 2n is exposed from the gap 23a, and the coating material on the coating surface B can be peeled off by each polishing surface 30b of each polishing member 30 protruding outward from the outer periphery. Therefore, in the case where there are convex portions or corner portions on the painted surface B, and the outer periphery of the rotating body 2n exposed from the gap 23a is applied to the convex portions or corner portions, the convex portions, corner portions, etc. The coating material painted on can be peeled off.
Further, the first gap 23 and the gap 23a are formed in a space K (FIG. 5) formed between the lower surface of the first cover 2a1 and the rotating body 2n when the suction device 40 (FIG. 8) is operated. This is for taking in outside air A.
In addition, a second gap 26 is formed between the outer peripheral surface of the rotating body 2n and the inner peripheral surface of the first cover 2a1. The second gap 26 guides the outside air A taken in by the first gap 23 to a space K (FIG. 5) formed between the lower surface of the first cover 2a1 and the upper surface of the rotating body 2n. belongs to. Furthermore, as shown in FIG. 5, in the state where the lower end edge 22c of the third cover 22 is in contact with the coating surface B, the second cover 2a2 is provided between the lower end edge 2a4 and the coating surface B with the second A third gap S communicating with the gap 26 is formed. The third gap S is also for guiding the outside air A to the space K, like the second gap 26.

  The third cover 22 is supported on the upper surface of the first cover 2a1 by support members 2f provided at a plurality of locations. Each support member 2f includes a substantially L-shaped metal fitting 2f1, a bolt 2g, a nut 2g1 (FIG. 4), and a compression coil spring 2h (FIG. 2). 2, each bolt 2g is inserted through a compression coil spring 2h, and the compression coil spring 2h is interposed between the lower surface of the head of the bolt 2g and the upper surface of the metal fitting 2f1. ing. When the coating material peeling device 2 is not pressed against the coating surface B, the bolt 2g protrudes from the upper surface of the first cover 2a1 by the free length of the compression coil spring 2h.

  Further, a soft fourth cover 24 covering the outer peripheral surface is wound around the outer peripheral surface of the third cover 22 so as to be detachable. In this embodiment, the fourth cover 24 is made of rubber and has flexibility. A hook-and-loop fastener 22 a is attached to the outer peripheral surface of the third cover 22, and a hook-and-loop fastener 24 a is also attached to the inner peripheral surface of the fourth cover 24. That is, the fourth cover 24 maintains a state where the outer peripheral surface of the third cover 22 is covered by attaching the hook-and-loop fastener 24 a to the hook-and-loop fastener 22 a of the third cover 22. The fourth cover 24 can be easily removed from the third cover 22 by picking the tip and pulling the fourth cover 24 in the direction opposite to the winding direction.

  As shown in FIG. 4, a water supply port 2j for supplying (injecting) water is provided on the lower surface of the first cover 2a1. The water supply port 2j communicates with a water amount adjusting device 21 (FIG. 2) that adjusts the water amount, and a water supply tube 2b is connected to the water amount adjusting device 21. Further, the water amount adjusting device 21 is rotatably attached with a water amount adjusting lever 21a for adjusting the water amount. By adjusting the amount of rotation of the water amount adjusting lever 21a, water W is supplied (injected) from the water supply port 2j, the amount of water supplied (injected) is adjusted, and supply (injection) is stopped.

  Further, as shown in FIG. 4, the lower surface of the first cover 2 a 1 has a discharge port for discharging muddy water M (FIG. 5) in which the peeled release powder and water supplied from the water supply port 2 j are mixed. 2v is formed through. The discharge port 2v is formed in a substantially elliptical shape having a short axis b extending in the front-rear direction of the coating material peeling apparatus 2 and a long axis a intersecting the short axis b. The center P1 of the first cover 2a1 and the rotation center P (FIG. 6) of the rotating body 2n are coaxial. An angle formed by a line L1 connecting the center of the water supply port 2j and the center P1 of the first cover 2a1, and a line L2 connecting the intersection of the short axis b and the long axis a and the center P1 of the first cover 2a1. θ is 180 degrees or more and less than 360 degrees when measured in the rotation direction (F1) of the rotating body 2n. In this embodiment, the angle θ is about 250 degrees.

(Experiment 1)
The inventor of the present application conducted an experiment to examine the influence of the positional relationship between the water supply port 2j and the discharge port 2v on the discharge efficiency of the muddy water M. In this experiment, as shown in FIG. 9, the coating material peeling apparatus 2 is placed on the vertical painting surface B of the concrete structure in a vertical posture with the front end upward and the lower end downward. It was peeled off. Moreover, the rotation speed of the rotary body 2n and the amount of water per unit time injected from the water supply port 2j were made constant. The discharge port 2v has a circular shape with a diameter of about 25 mm.
As a result of this experiment, when m is the discharge amount per unit time of the muddy water M when the angle θ is 60 degrees, the discharge amount increases to about 1.2 m when the angle θ is 120 degrees, and the angle θ is 180 degrees. The amount of emissions increased to about 1.3m when the temperature reached. Further, the discharge amount increased to about 1.5 m when the angle θ was 240 degrees. That is, it was found that the discharge amount of the muddy water M increases as the angle θ increases, and that when the angle θ is 240 degrees, the discharge efficiency is improved by about 50% compared to when the angle θ is 60 degrees.

  Although the angle θ can be larger than about 250 degrees in the present embodiment, the angle θ is about 250 because it is restricted by the arrangement space of the discharge pipe 2c connected to the discharge port 2v and the water amount adjusting device 21. The degree was desirable. Further, when the peeling operation is performed with the coating material peeling device 2 in a vertical posture with the front end on the upper side and the lower end on the lower side with respect to the coating surface B, the muddy water M in which the peeled powder and water W are mixed is Since it falls downward (toward the rear end direction of the coating material peeling device 2) due to gravity, by forming the discharge port 2v near the rear end of the coating material peeling device 2 in the first cover 2a1, It was estimated that the recovery efficiency would improve. Further, since the discharge pipe 2c has a straight pipe shape, it is desirable to arrange the discharge pipe 2c along the casing 2d so that the discharge pipe 2c does not interfere with the peeling operation. For these reasons, as shown in FIG. 4, the discharge port 2v is formed near the rear end of the coating material peeling apparatus 2 and near one end of the discharge pipe 2c in the first cover 2a1.

(Experiment 2)
The inventor of the present application conducted an experiment to examine the influence of the shape of the discharge port 2v on the discharge efficiency of the muddy water M. In this experiment, the center of the discharge port 2v is fixed by setting the aforementioned angle θ to about 250 degrees, a circular discharge port having the same diameter as the short axis b of the discharge port 2v, and a long axis shown in FIG. Comparison was made with an elliptical outlet 2v having a and a short axis b. The diameter of the circular outlet is about 25 mm. The major axis a of the elliptical outlet 2v is about 50 mm, and the minor axis b is about 25 mm. As a result, when the discharge amount in the case of the circular discharge port is n, the discharge amount at the elliptical discharge port 2v is about 2.0n. It was estimated that this was because the discharge area per unit time increased because the elliptical opening area of the discharge port was larger.
The area of the circular discharge port is 625 m ² , the area of the elliptical discharge port 2v is about 980 m ² , and the area of the elliptical discharge port 2v is about 1.6 times the area of the circular discharge port. is there. The discharge efficiency was better than the comparison of the areas. The long axis a of the discharge port 2v was along the direction F3 (FIG. 4) in which the muddy water M flows, and the discharge pipe 2c was inside the discharge port 2v. The wall 2v1 communicating with the pipe has a shape obtained by obliquely cutting the cylinder, and the resistance of the muddy water M flowing into the discharge port 2v is reduced, resulting in a synergistic effect and an increase in discharge per unit time. It was estimated that this had an effect.

(Experiment 3)
Furthermore, the inventor of the present application conducted an experiment to examine the influence of the first gap 23 and the third gap S on the suction efficiency of the peeled powder.
This experiment was performed by connecting the discharge pipe 2c of the coating material peeling apparatus 2 to a suction apparatus 40 (FIG. 8) described later. The suction air volume of the suction device 40 during the experiment is 61 L / sec, and the degree of vacuum is 23 kPa. At first, the first gap 23 and the third gap S are set to 5.0 mm, the coating material on the coating surface B is peeled off, and the mass of the peeling powder sucked by the suction device 40 for 10 minutes is set. Measured. Thereafter, the same experiment was performed while decreasing the first gap 23 and the third gap S in units of 0.1 mm. As a result, when the first gap 23 and the third gap S are each 0.7 mm or less, the lower end edge 2a4 of the second cover 2a2 is attracted to the coating surface B, and the coating material is peeled off. Became difficult. Moreover, when the 1st clearance gap 23 and the 3rd clearance gap S each became 1.3 mm or more, the suction efficiency fell extremely and the mass of the attracted | sucked peeling powder decreased extremely.
Therefore, the inventor of the present application sets the first gap 23 and the third gap S to 0.8 mm or more and 1.2 mm or less from the above experimental results, so that the lower end edge 2a4 of the second cover 2a2 is It was concluded that it was not adsorbed on the coating surface B and the suction efficiency of the release powder could be increased.

(Experiment 4)
Furthermore, the inventor of the present application conducted an experiment to examine the influence of the height H of the inner peripheral surface of the second cover 2a2 on the amount of exfoliated powder leaking from the space K to the outside.
This experiment was performed by connecting the discharge pipe 2c of the coating material peeling apparatus 2 to a suction apparatus 40 (FIG. 8) described later, as in the experiment 3 described above. The suction air volume of the suction device 40 during the experiment is 61 L / sec, and the degree of vacuum is 23 kPa. At first, the height H was set to 15 mm, and every time the height H was increased by 1 mm, the peeling powder leaking from the space K to the outside was observed. As a result, when the height H was 15 mm to 19 mm, the peeling powder leaked from the space K to the outside. This was presumed to be caused by the release powder that circulated in the space K and could not reach the discharge port 2v leaked to the outside because the volume of the space K was small. And when the height H exceeded 30 mm, the suction efficiency began to decrease. This is presumed to be caused by an increase in the volume of the space K that is the suction target of the suction device 40.
Therefore, the inventor of the present application, based on the above experimental results, sets the height H of the inner peripheral surface of the second cover 2a2 to 20 mm or more and 30 mm or less, so that the peeling powder does not leak out from the space K, It was concluded that the suction efficiency could not be lowered.

(Structure of rotating body)
As shown in FIG. 6, a plurality of polishing members 30 and 31 are attached to the lower surface of the rotating body 2n. The polishing members 30 and 31 are attached along the rotation direction F1 of the rotating body 2n, that is, along the rotation locus. A part of the plurality of polishing members 31 is attached to the lower surface near the outer periphery of the rotating body 2n at predetermined intervals, and the other part is attached to the lower surface near the rotation center P at predetermined intervals. ing. The plurality of polishing members 30 are attached at predetermined intervals along the outer peripheral edge of the rotating body 2n. In the following description, a surface facing downward from the lower surface of the rotating body 2n, that is, a surface facing the coating surface B is defined as a flat surface.
As shown in FIGS. 7A to 7C, the polishing member 31 is formed in a thin and substantially plate shape, a rectangular flat surface 31a, a pair of substantially wedge-shaped side surfaces 31c and 31c, and a horizontally long polishing. And a surface 31b. The polishing surface 31b for polishing and peeling the coating material is an inclined surface (tapered surface) with respect to the lower surface of the rotating body 2n. As shown in FIG. 31b is attached to the rotation direction F1 (so as to intersect the rotation locus).

  As shown in FIGS. 7D to 7F, the polishing member 30 is formed in a horizontally long and narrow rectangular parallelepiped plate shape, a horizontally long rectangular plane 30a and a pair of horizontally long rectangular side surfaces 30c, 30c and a horizontally long polishing surface 30b. The polishing surface 30b for polishing and peeling the coating material is formed perpendicular to the lower surface of the rotating body 2n. As shown in FIG. 6, each polishing member 30 rotates the polishing surface 30b in the rotation direction. Each is attached toward F1 (so as to intersect the rotation trajectory). Each polishing member 30 has a part of the polishing surface 30b protruding outward from the outer periphery of the rotating body 2n. As shown in FIG. 5, the periphery 2n1 of the rotating body 2n is the same height as the lower end edge 2a4 of the second cover 2a2, and the lower surface of each polishing member 31 protrudes downward from the lower end edge 2a4. Although not shown in the figure, the lower surface of each polishing member 30 also protrudes downward from the lower edge 2a4. Each of the polishing members 30 and 31 is formed of a material in which a plurality of diamond particles are fixed to a metal binder (metal bond), and the plurality of diamond particles are formed on the polishing surfaces 30b and 30b of the polishing members 30 and 31, respectively. Each is exposed from 31b. The particle sizes of the binder and the diamond grains can be selected depending on the type of the coating material so that the coating material to be peeled can be efficiently peeled off.

  As shown in FIG. 6, a plurality of windows 2p formed through the front and back surfaces of the rotating body 2n are formed along the rotation direction F1 (rotation locus) of the rotating body 2n. In this embodiment, a total of nine windows 2p are formed through. As shown in FIG. 5, the rotating body 2n is formed in a skirt shape, and has a recess 25 formed from the peripheral edge 2n1 to the rotation center P. Each window 2p is formed so as to penetrate through the inner peripheral wall of the recess 25, and is formed in a substantially elliptical shape having a long axis along the radius of the rotating body 2n. Further, a water supply port 2j is provided above the rotating body 2n. The water supply port 2j is arranged on the rotation locus of each window 2p when the rotating body 2n rotates. When each window 2p passes below the water supply port 2j, the water supply port 2j is exposed from the passing window 2p. . In FIG. 6, the water supply port 2j is exposed from the window 2p which exists just under the water supply port 2j among the stopped rotating bodies 2n.

  When the rotating body 2n is rotating, when the window 2p passes below the water supply port 2j, that is, when the water supply port 2j is exposed from the window 2p, the water W injected from the water supply port 2j (FIG. 5). ) Is supplied to the recess 25 (FIG. 5) through the window 2p, wets the release powder As floating in the recess 25, and wets (wet) the surface on which the coating material has been polished. To prevent the device from splashing outside. Further, when the portion where the window 2p is not formed passes under the water supply port 2j, the water W injected from the water supply port 2j is injected onto the upper surface of the rotating body 2n, and the injected water W is It changes into a mist shape by the upper surface of the rotating rotating body 2n, is supplied to the space K, moistens the peeling powder As floating in the space K, and prevents the peeling powder As from scattering outside the apparatus. Further, the water sprayed from the water supply port 2j cools the polishing members 30 and 31, and extends the life of the polishing members 30 and 31.

As shown in FIG. 1, a detent piece 2y is provided at the upper front of the casing 2d, and a push button 2z is provided under the detent piece 2y. When the front end of the rotation stop piece 2y is pushed downward, the push button 2z is pushed down, the lock of the rotary shaft 2q (FIG. 3) on which the rotary body 2n is pivoted is released, and the rotary body 2n can be replaced.
In this embodiment, the rotating body 2n is made of metal having a diameter of about 90 to 100 mm, and rotates clockwise (counterclockwise when viewed from the bottom as shown in FIG. 6). Moreover, the rotation speed at the time of no load is 13,600 rotations / minute. Moreover, the pressure of the compressed air supplied is 0.6 MPa.

[Configuration of release coating material recovery system]
Next, the configuration of the release coating material collection system will be described with reference to the drawings. FIG. 8 is an explanatory diagram schematically showing the configuration of the release coating material recovery system.

  The release coating material recovery system 1 includes a coating material peeling device 2, a water supply pump 3 that supplies water W to the coating material peeling device 2, a compressor 18 that supplies compressed air to the coating material peeling device 2, and a coating material peeling device. And a suction device 40 for sucking the muddy water M discharged from 2. The water supply tube 2b of the coating material peeling apparatus 2 is connected to a water supply pump 3, and the water supply pump 3 receives water taken from a water supply source 4 such as a water supply or a water tank at the work site through the water supply tube 2b. To supply. Moreover, the feed water pump 3 can vary the pressure of the feed water from 0.3 MPa to 100 MPa. In addition, an anti-scattering agent such as a polymer for preventing the release powder from scattering can be added to a water tank (not shown) provided in the water supply pump 3. The connector 2 t of the coating material peeling device 2 and the compressor 18 are connected by an air supply hose 20, and the compressor 18 supplies compressed air to the coating material peeling device 2 through the air supply hose 20. The discharge pipe 2 c of the coating material peeling apparatus 2 is connected to the suction device 40 by the mud water discharge hose 6, and the mud water M discharged from the discharge pipe 2 c is sucked by the suction device 40 through the mud water discharge hose 6. Inside the suction device 40 is provided a collection bag 41 that separates water from the muddy water M and collects only the peeled powder As. The suction device 40 has a weight that can be carried by a person, and a lid that can be opened and closed is provided on an upper surface thereof. The collection bag 41 is detachably attached to the inside of the suction device 40, and can be taken in and out by opening the lid. The collection bag 41 has the ability to filter dust of 0.3 μm or less, and further, the collection bag 41 has a highly water-absorbing resin (for example, a cross-linked product of acrylic acid polymer partial sodium salt) as a coagulant. ) Is stored in advance, so that when it is connected to the coating material peeling apparatus 2, the release powder containing moisture is solidified. Accordingly, since no water remains in the collection bag 41 and only the peeled powder remains, the collection bag 41 may be treated as industrial waste as it is, so that the work efficiency of removing the peeled powder can be increased.

[Operation and action of coating material peeling device]
Next, the operation and action of the coating material peeling apparatus 2 will be described with reference to the drawings. FIG. 9 is an explanatory view schematically showing how the coating material peeling device peels the coating material coated on the painted surface.

Here, a concrete wall surface will be described as an example of the structure, and an operation of peeling a coating material painted on the wall surface will be described as an example. In FIG. 9, the painted surface B of the concrete wall contained asbestos or asbestos, such as sprayed asbestos, asbestos-containing sprayed rock wool, asbestos-containing heat insulating material, asbestos-containing fireproof covering material, asbestos-containing heat insulating material. The coating material is painted.
First, it is desirable to increase the work efficiency by applying a coating film softener (peeling agent) to the painted surface B before the peeling operation and preparing the coating material to be easily peeled off. And the water supply pump 3, the compressor 18, and the suction device 40 are each started. Subsequently, when the water amount adjustment lever 21 a (FIGS. 1 and 2) provided in the coating material peeling device 2 is rotated in the opening direction, the water W supplied from the water supply pump 3 through the water supply tube 2 b passes through the water amount adjustment device 21. It is injected from the water supply port 2j (FIG. 5). Subsequently, when the switch 2e (FIGS. 1 and 2) provided in the coating material peeling apparatus 2 is rotated, the air motor 2w (FIG. 2) is driven by the compressed air supplied from the compressor 18, and the rotating body 2n is moved at high speed. Rotate.

When the operator presses the lower end edge 22c of the third cover 22 and the lower end edge 24b of the fourth cover 24 against the coating surface B (FIG. 9), the third cover 22 and the fourth cover 24 are respectively As shown in FIG. 5, the lower end edge 22c of the third cover 22, the lower end edge 24b of the fourth cover 24, and the rotating body 2n are polished. The lower surfaces of the members 30 and 31 are at the same position. On the other hand, the lower end edge 2a4 of the second cover 2a2 is in a state of floating from the coating surface B, and the first gap 23 and the space K are in communication with each other. And the coating material of the coating surface B is grind | polished and peeled by each grinding | polishing member 30 and 31 of the rotating body 2n to rotate. In addition, the ground concrete on the painted surface B is also slightly scraped off to form a release powder As.
When the operator moves the coating material peeling apparatus 2 while pressing it against the coating surface B, the coating material is polished and peeled along the movement path. In FIG. 9, symbol G indicates a portion where the coating material is polished and removed by the coating material peeling apparatus 2, that is, a removed surface.

As shown in FIG. 5, a part of the water W sprayed from the water supply port 2j is sprayed onto the paint surface B through each window 2p of the rotating rotator 2n to wet (wet) the paint surface B. As a result, since the wet painted surface B can be polished, the peeling powder As peeled from the painted surface B by this polishing becomes wet, without leaking and floating outside the apparatus, The inside of the recess 25 of the rotating body 2n is convected. Therefore, there is no possibility that the peeling powder As floats in the air and the worker inhales it to harm health.
Furthermore, the polished surface can be cleaned with the water W sprayed from the water supply port 2j. Further, even when the rotating body 2n is stopped, if the water supply port 2j is exposed from any one of the windows 2p and the water amount adjusting lever 21a is operated so that the water amount is large, the water is injected from the water supply port 2j. The polished surface can be cleaned with water.
Therefore, it is not necessary to perform a troublesome work of connecting the hose to the water source and cleaning the polished surface, so that the cleaning work efficiency can be improved.
Further, during the peeling operation, water can be saved by adjusting the water supply pressure of the water supply pump 3 to about 0.3 MPa and suppressing the amount of water injected from the water supply port 2j. Further, when cleaning the removal surface G, the cleaning efficiency can be improved by adjusting the water supply pressure to 50 to 100 MPa and increasing the amount of water ejected from the water supply port 2j.
Since the space K is in a negative pressure state by the suction force of the suction device 40, the peeling powder As that convects the inside of the recess 25 is sucked into the space K through the windows 2p. The other part of the water W injected from the water supply port 2j is injected into a portion of the upper surface of the rotating body 2n where the window 2p is not formed, and is changed into a mist by the rotating body 2n rotating at high speed. Supplied to K. For this reason, water W is further added to the peeling powder As sucked into the space K, and the muddy water M is changed.

  Further, since the first gap 23 and each intake hole 2a5 and the space K are in communication with each other, the outside air A is taken into the space K through the first gap 23 and each intake hole 2a5 by the operation of the suction device 40. . The outside air A taken into the space K is discharged to the suction device 40 through the discharge port 2v. In other words, when the suction device 40 is operated, the outside air A is circulated such that the outside air A is taken into the space K through the first gap 23 and each intake hole 2a5 and is discharged to the suction device 40 through the discharge port 2v. Thereby, the space K is in an appropriate negative pressure state, and the suction efficiency of the suction device 40 is improved. In addition, since the space K is not in a vacuum state or a state close thereto, that is, an extremely negative pressure state, the lower end edge 22c of the third cover 22 and the lower end edge 24b of the fourth cover 24 are attracted to the coating surface B. There is no risk that workability will be reduced.

The muddy water M in the space K is discharged from the discharge port 2v and sucked into the suction device 40 through the muddy water discharge hose 6. Then, the sucked muddy water M is collected in the collection bag 41, the moisture exudes from the collection bag 41, and only the peeling powder As remains in the collection bag 41. That is, the collection bag 41 in which the peeling powder As is accumulated can be disposed as industrial waste.
Furthermore, since each polishing member 30 and 31 is cooled by the water W injected from the water supply port 2j, durability of each polishing member 30 and 31 can be improved.
According to the experiment of the present inventor, when polishing is performed while supplying water W to each of the polishing members 30 and 31 and cooling, compared to the case of polishing without supplying water to each of the polishing members 30 and 31, The life of each of the polishing members 30, 31 is increased by 20%.
Moreover, the weight of the coating material peeling apparatus 2 is about 1.8 kg, and is a weight that can be easily operated with one hand.

Further, the third cover 22 and the fourth cover 24 are configured to be movable up and down by the elastic force of each compression coil spring 2h. When the coating material peeling device 2 is pressed against the coating surface B, the compression coil spring 2h When moving away from the coating surface B against the elastic force, the return to the position before the movement by the restoring force of each compression coil spring 2h.
For this reason, even if the rotating body 2n moves up and down in a direction perpendicular to the coating surface B during the coating material peeling operation, the third cover 22 and the fourth cover 24 are moved relative to the coating surface B. Therefore, the peeled coating material or the like is hardly scattered from the gap between the third cover 22 and the fourth cover 24 and the coating surface B.
In this embodiment, the fourth cover 24 is made of rubber and has flexibility, so that vibration transmitted to the worker by the peeling work can be reduced.
And since the 4th cover 24 is soft, even if it is a case where it collides with the concrete wall surface of the 4th cover 24, there is no possibility of damaging a concrete wall surface.

[Other configuration of release coating material recovery system]
Next, another configuration of the release coating material recovery system will be described with reference to the drawings. FIG. 10 is an explanatory view schematically showing another configuration of the release coating material recovery system.

  The release coating material recovery system 50 includes a water supply pump 3, water supply tubes 2 b and 2 b, a compressor 18, air supply hoses 20 and 20, muddy water discharge hoses 6 and 6, a filtration tank 7, a bottom plate 9, and a peeling. A coating material container 8, a suction hose 12, a decompression device 13, a drainage hose 14, a drainage device 15, a drainage hose 16, a filtration device 17, and a neutralization device 19 are provided. In addition, in FIG. 10, although the two coating material peeling apparatuses 2 are shown, in order to raise the efficiency of the coating material peeling operation | work, the case where the coating material peeling apparatuses 2 of 3 units | sets, 4 units | sets, or more are used. is there.

The water supply pump 3 takes in water supplied from a water supply source 4 such as a water supply at a work site, and supplies the taken-in water to each coating material peeling device 2 through each water supply tube 2b. In this embodiment, the water supply pump 3 supplies 50 to 1,000 cm ³ of water per minute to one coating material peeling apparatus 2. Further, the compressor 18 supplies the compressed air to each coating material peeling apparatus 2 via the air supply hose 20.

  A bottom plate 9 is disposed at the bottom of the sealed filtration tank 7, and a release coating material container 8 is placed on the top surface of the bottom plate 9. The release coating material container 8 is disposed in the outlet direction of each muddy water discharge hose 6. The release coating material container 8 is formed of a material for filtering dust such as release coating material and concrete particles contained in the muddy water sent from each mud drain hose 6, and accumulates the filtered dust. However, it is formed in a shape to accommodate.

The filtration tank 7 is connected via a suction hose 12 to a decompression device 13 that draws air inside the filtration tank 7 to bring it into a negative pressure state. Thus, when the inside of the filtration tank 7 is in a negative pressure state, the inside of the space K (FIG. 5) of the coating material peeling device 2 is in a negative pressure state via the muddy water discharge hose 6, and the discharge port 2 v The muddy water M is sucked up and discharged to the filtration tank 7 through the muddy water discharge hose 6.
Further, a drainage device 15 for draining water that has been leached from the release coating material container 8 and stored in the filtration bath 7 from the filtration bath 7 to the filtration device 17 is connected to the filtration bath 7 via a drainage hose 14. Yes. The drainage device 15 maintains a lower water level in the filtration tank 7 of the water exuded from the release coating material container 8 than in the bottom plate 9 in a state where each coating material peeling device 2 and the decompression device 13 are operating. To work.

  A filtration device 17 is connected to the drainage side of the drainage device 15 via a drainage hose 16, and a neutralization device 19 is connected to the drainage side of the filtration device 17. The filtering device 17 filters the water drained from the draining device 15 and discharges the filtered water to the neutralizing device 19. The neutralization device 19 includes a neutralization treatment tank 19a and a carbon dioxide gas cylinder 19b.

(Filtration tank)
Next, the structure of the filtration tank 7 will be described with reference to FIG. FIG. 11 is an explanatory view showing a state where the release coating material container 8 is taken out from the filtration tank 7.

  The filtration tank 7 is formed in a rectangular parallelepiped box shape. In the top plate 7a of the filtration tank 7, connection ports 7f and 7f for connecting outlets of the respective muddy water discharge hoses 6 (FIG. 10) are formed. The top plate 7a is formed with a connection port 7g for connecting the inlet of the suction hose 12 (FIG. 10). A bottom plate 9 for placing the release coating material container 8 is provided on the bottom 7 b of the filtration tank 7. The bottom plate 9 includes a frame-like member 9a and a mesh-like member 9c arranged on the upper surface of the frame-like member 9a, and the release coating material container 8 is placed on the mesh-like member 9c. . The four pieces of the frame-shaped member 9a are formed with notches 9b for water passage. Two locking members 7i for fixing the release coating material container 8 are fixed to the side plates 7d and 7e. The illustration of the locking member 7i fixed to the side plate 7e is omitted.

  Further, the side plate 7c of the filtration tank 7 is formed with a drain port 7h for connecting the inlet of the drain hose 14 (FIG. 10). The drain port 7h is for draining the water stored in the filtration tank 7, and is formed at a position close to the bottom portion 7b and lower than the height of the bottom plate 9. The top plate 7 a is configured to be openable and closable so that the release coating material container 8 placed on the bottom plate 9 can be taken out from the filtration tank 7. The filtration tank 7 is placed on the loading platform of a vehicle such as a truck and carried to the work site.

(Release coating material container)
The release coating material container 8 is formed in a bag shape from synthetic resin fibers. In this embodiment, the release coating material container 8 is formed in a rectangular parallelepiped shape whose upper surface is open. Each surface of the release coating material container 8 is formed in a mesh shape and has water permeability. That is, it is formed so that the muddy water exudes from the mesh portion, and the dust 10 such as the release coating material is filtered and accumulated. In this way, the dust 10 such as the coating material contained in the muddy water sent from each coating material peeling apparatus 2 is filtered by the peeling coating material container 8.

  The release coating material container 8 includes a main body 8a, four fixing belts 8b, and two lifting belts 8d. Two fixing belts 8b are respectively attached to a pair of opposite side surfaces of the main body 8a, and a circle for locking to the locking member 7i of the filtration tank 7 is attached to the tip of each fixing belt 8b. Each of the annular locking portions 8c is formed. When the release coating material container 8 is placed on the bottom plate 9 of the filtration tank 7, the locking part 8 c of each fixing belt 8 b is locked to the corresponding locking member 7 i, so that the inside of the filtration tank 7. Fixed to. That is, by fixing the release coating material container 8 at four points, there is no possibility that the release coating material container 8 is inclined or falls due to the weight of the accumulated dust 10.

One lifting belt 8d is attached to each of a pair of opposite side surfaces of the main body 8a, and both ends are formed in an arc shape fixed to the main body 8a. When the garbage 10 accumulated in the release coating material container 8 reaches a predetermined amount, a lifting device such as a crane or a forklift is used to lift the release coating material container 8 using a lifting belt 8d, and a filtration tank 7 to the outside.
In this embodiment, the release coating material container 8 is formed by weaving polypropylene or polyethylene fibers among what are commonly called flexible containers (registered trademark of National Marine Plastics Co., Ltd., abbreviation for flexible container bag). It is excellent in water permeability, light weight and high strength, and has a capacity of 1000 liters.

(Pressure reduction device)
The decompression device 13 shown in FIG. 5 sucks air inside the filtration tank 7 and evacuates the inside of the filtration tank 7, whereby each space of each coating material peeling device 2 is connected via the muddy water discharge hoses 6 and 6. This is a device for generating a negative pressure in K. In this embodiment, a vacuum collector is used as the decompression device 13.

(Drainage device)
The drainage device 15 shown in FIG. 5 is a device for draining water stored in the bottom of the filtration tank 7 to the filtration device 17. Since the release coating material container 8 is placed on the bottom plate 9 of the filtration tank 7, when the water level stored in the filtration tank 7 becomes higher than the bottom plate 9, the release coating material container 8 is submerged. The drainage of the garbage 10 becomes insufficient. Furthermore, if the dust 10 contains moisture, the weight of the release coating material container 8 increases, so that a large amount of power is required to lift the release coating material container 8. For this reason, the drainage device 15 operates so that the water level in the filtration tank 7 can be maintained at a level lower than the height of the bottom plate 9.

On the other hand, since the filtration tank 7 is evacuated by the decompression device 13, the drainage device 15 needs to be able to overcome the vacuum pressure and discharge water.
Accordingly, the inventors of the present application have repeated trial and error using various pumps, and as a result, have found that a grout pump for sending raw materials such as concrete and mortar to a work place at a construction site is suitable. That is, by connecting the raw material injection side of the grout pump to the filtration tank 7 and connecting the raw material discharge side to the filtration device 17, the inside of the filtration tank 7 was stored in the filtration tank 7 while maintaining the target vacuum pressure. The water was successfully drained to the filter device 17.
Grout pumps have a structure in which the tube is crushed by a rotor and the liquid material in the tube is directly squeezed out. It is because it can send out to. For this reason, by using a grout pump as the drainage device 15, water stored in the filtration tank 7 can be drained even if the inside of the filtration tank 7 has a vacuum pressure of −93 kPa or less. Moreover, since there is no valve structure in the grout pump, there is no possibility that the release coating material or concrete pieces mixed in the water stored in the filtration tank 7 will clog the valve and cannot be drained. Further, unlike other drainage pumps having a valve structure, the grout pump is not in communication with the outside air, so that the vacuum pressure inside the filtration tank 7 can be maintained, so that the water level of the filtration tank 7 is kept constant. And the negative pressure in the space K of the coating material peeling apparatus 2 can be kept constant.

(Water treatment equipment)
The water treatment device composed of the filtration device 17 and the neutralization device 19 is a device for treating the water drained from the drainage device 15 and changing it into water that conforms to environmental standards. The muddy water sent from each coating material peeling device 2 to the filtration tank 7 is filtered with a release coating material container 8 to remove a certain amount of release coating material and debris 10 such as concrete particles. Impurities such as fine release coating materials and concrete grains that have passed through the mesh of the body 8 are mixed with water that has exuded from the release coating material container 8. Moreover, since the muddy water containing concrete grains and the like is alkaline with a pH of 9 or more, the water stored at the bottom of the filtration tank 7 does not meet the standard that can be discharged into the natural environment, that is, the environmental standard.

Therefore, the filtration device 17 filters the water drained from the drainage device 15 and discharges the filtered water to the neutralization device 19. In this embodiment, the filtration device 17 includes a filtration container having a 100 μm mesh filtration filter, a filtration container having a 50 μm mesh filtration filter, and a filtration container having a 0.2 μm mesh filtration filter. For example, a polypropylene thread wound type impurity filtration filter can be used as each filtration filter.
The water drained from the drainage device 15 sequentially passes through the filtration containers, and impurities such as coating materials such as asbestos and concrete grains exceeding 0.2 μm that could not be filtered in the filtration tank 7 are filtered. That is, muddy water containing a coating material such as asbestos can be filtered below the detection limit value.
Moreover, the neutralization processing tank 19a stirs the water discharged | emitted from the filtration apparatus 17, and neutralizes water with the carbon dioxide gas inject | poured from the carbon dioxide gas cylinder 19b. The neutralization treatment tank 19a includes a pH detector, a pH indicator, and a pH recorder. The neutralization tank 19a drains the water discharged from the filtration device 17 after neutralizing the water to an environmental standard pH of 5.8 to 8.6.

[Usage of Release Coating Material Recovery System 50]
Next, the usage method of the peeling coating material collection | recovery system 50 is demonstrated with reference to figures. In addition, description is abbreviate | omitted about the same part as the peeling coating material collection | recovery system 1 mentioned above.
The release coating material collection system 50 shown in FIG. 10 is disposed in the vicinity of the work site, and the water supply pump 3 is connected to a water supply source 4 such as a water supply or a water storage tank at the work site. The water supply pump 3, the compressor 18, the decompression device 13, the drainage device 15 and the neutralization device 19 are driven. When the water supply pump 3 is driven, water taken from the water supply source 4 is supplied to each coating material peeling device 2 via each water supply tube 2b. Further, when the decompression device 13 is driven, the air in the filtration tank 7 is sucked through the suction hose 12, the inside of the filtration tank 7 is in a vacuum state, and each coating material peeling device 2 is passed through the muddy water discharge hose 6. The inside of the space K (FIG. 5) is in a negative pressure state.

  The muddy water M is discharged from the discharge pipe 2 c to the filtration tank 7 through the muddy water discharge hose 6. The muddy water discharged into the filtration tank 7 is discharged into the release coating material container 8, and the dust 10 such as the release coating material and concrete particles contained in the muddy water is filtered by the release coating material container 8, and the dust 10 The filtered water exudes from the mesh of the release coating material container 8 and falls to the bottom 7 b of the filtration tank 7. Here, since the release coating material container 8 is placed on the mesh member 9c provided on the upper surface of the bottom plate 9, the water oozed from the bottom of the release coating material container 8 causes the mesh member 9c to flow. It passes and falls to the bottom 7b.

Since the drain port 7h is formed at a position close to the bottom portion 7b and lower than the height of the bottom plate 9, the water stored in the bottom portion 7b is drained by the suction force of the drainage device 15 to the drain port 7h. Drained from.
Here, even if the inside of the filtration tank 7 reaches a predetermined vacuum pressure, the drainage device 15 can drain the water stored in the filtration tank 7 because the suction force is high enough to overcome the vacuum pressure. The filtration tank 7 is not filled with water oozed from the release coating material container 8.
Therefore, it is not necessary to interrupt the peeling operation and replace the filtration tank 7 every time the filtration tank 7 is filled with stored water.
That is, the coating material peeling operation can be performed continuously regardless of the amount of water used by each coating material peeling device 2, so that the coating material peeling operation efficiency can be increased.

Furthermore, since the water level of the water exuded from the release coating material container 8 is maintained at a lower level than the bottom plate 9 on which the release coating material container 8 is placed, the release coating material container 8 is used in the filtration tank 7. There is no risk of being immersed in water stored in the water. Further, since the release coating material container 8 is placed on the mesh member 9c provided on the upper surface of the bottom plate 9, the waste 10 accumulated in the release coating material container 8 is drained. Can do.
Therefore, since the waste 10 accumulated in the release coating material container 8 can be drained efficiently, the weight of the release coating material container 8 in which the dust 10 is accumulated can be reduced. The labor required to take out the container 8 from the filtration tank 7 can be reduced.

  The water drained by the drainage device 15 is sent to the filtration device 17 and sequentially passes through a 100 μm mesh filtration filter, a 50 μm mesh filtration filter, and a 0.2 μm mesh filtration filter, and finally exceeds 0.2 μm. Impurities are filtered and discharged to the neutralization tank 19a. Alkaline water exceeding pH 8 stored in the neutralization tank 19a is neutralized to pH 5.8 to 8.6 by carbon dioxide injected from the carbon dioxide cylinder 19b. And it confirms that the numerical value of the pH indicator with which the neutralization processing tank 19a was equipped is a numerical value suitable for an environmental standard, the drain cock of the neutralization processing tank 19a is opened, the drain groove of a work site, etc. Through the natural environment.

And the peeling operation | work of a coating material by the coating material peeling apparatus 2 continues, and when the garbage 10 accumulate | stored in the peeling coating material container 8 becomes full, a peeling operation | work is interrupted. Subsequently, the top plate 7a (FIG. 7) of the filtration tank 7 is opened, and the release coating material container 8 is lifted and loaded on a loading platform such as a truck using a work vehicle such as a crane or a forklift. The loaded release coating material container 8 can be disposed of as industrial waste as it is, or the waste 10 inside can be discarded and reused. Therefore, the efficiency of the coating material peeling operation and the recovered coating material recovery operation can be increased.
Subsequently, when the coating material is peeled off, a new release coating material container 8 having an empty content is placed on the bottom plate 9, and the locking portions 8c of the fixing belts 8b are connected to the side plates 7d and 7e. Lock to each locking member 7i. Then, the top plate 7a is closed, and the coating material peeling operation is restarted by the above-described operation procedure.

[Effect of the embodiment]
(1) If the coating material peeling apparatus 2 of embodiment mentioned above is implemented, the lower end edge 22c of the 3rd cover 22 will each plane 30a of each polishing member 30 and 31 when the coating material peeling operation | work is performed. , 31a, the release powder As released from the coating surface B by the polishing members 30, 31 hardly leaks outward from the third cover 22.

  Further, since the third cover 22 is supported by the first cover 2a1 at a plurality of locations via the compression coil spring 2h so as to be movable up and down, the rotating body 2n is not removed when the coating material is being peeled off. Even when it moves up and down in the direction of the rotation axis, the lower end edge 22c of the third cover 22 is maintained in contact with the painted surface B, so that the painted surface B and the lower end edge 22c of the third cover 22 are maintained. Is difficult to form between the first cover 22 and the release powder As, the third cover 22 hardly leaks outward.

Furthermore, when the lower end edge 22c of the third cover 22 is not pressed against the coating surface B, the flat surface 30a, 31a of each polishing member 30, 31 is caused by the elastic force of the compression coil spring 2h. Since the rotary body 2n is lifted from the coating surface B during the peeling operation, the lower end edge 22c of the third cover 22 can be brought into contact with the coating surface B.
That is, even when the rotating body 2 n is lifted from the coating surface B, the peeling powder As is difficult to leak outward from the third cover 22.

Furthermore, the water supply port 2j is provided on the lower surface of the first cover 2a1 so as to be exposed from any of the plurality of windows 2p when the rotating body 2n is viewed from the lower surface, and supplies water to the space K. At the same time, water is supplied to the recess 25 on the lower surface of the rotating body 2n through the plurality of windows 2p.
That is, the water W supplied from the water supply port 2j and the release powder As can be mixed to form a mud.
Moreover, since the polishing is performed while supplying the water W, the peeling powder As does not remain on the removal surface or inside the apparatus.

  Therefore, if the coating material peeling apparatus 2 is implemented, the peeling powder As does not scatter into the air during the polishing operation or the peeling powder As remaining on the removal surface does not float in the air. There is no danger of inhalation and health.

(2) Moreover, the coating material peeling apparatus 2 of embodiment mentioned above is penetrated and formed in the location near the rear end of the coating material peeling apparatus 2 among 1st covers 2a1, and the discharge port connected with the space K 2v is provided. Furthermore, a gap formed along the outer peripheral surface of the second cover 2a2 between the outer peripheral surface of the second cover 2a2 and the inner peripheral surface of the third cover 22, and when the suction device 40 is activated. Is formed between the first gap 23 for taking in the outside air A and the outer peripheral surface of the rotating body 2n and the inner peripheral surface of the second cover 2a2, and the first device when the suction device 40 is activated. And a second gap 26 for guiding the outside air A taken into the gap 23 to the space K.
That is, since the outside air A can be guided to the space K through the first gap 23 and the second gap 26 when the suction device 40 is operated, the air from the space K to the suction device 40 through the discharge port 2v. Since the flow of is improved, the suction force can be increased.
(3) Moreover, since the space communicates with the outside of the apparatus due to the first and second gaps, the interior of the space is not extremely depressurized, so the second cover is not attracted to the painted surface, and the peeling work efficiency Can also be increased.

(4) Furthermore, the discharge port 2v of the coating material peeling device 2 is formed through the first cover 2a1 at a location near the rear end of the coating material peeling device 2, and the front and rear direction of the coating material peeling device 2 Is formed in a substantially elliptical shape having a short axis b extending in a straight line and a long axis a intersecting with the short axis b. Further, the center P1 of the first cover 2a1 and the rotation center P of the rotating body 2n exist on the same axis, and a line L1 connecting the center of the water supply port 2j and the center P1 of the first cover 2a1; The angle θ formed by the line L2 connecting the intersection of the short axis b and the long axis a of the discharge port 2v and the center P1 of the first cover 2a1 is 180 degrees or more when measured in the rotation direction F1 of the rotating body 2n. It is less than 360 degrees.
That is, even when working in a posture in which the front end of the coating material peeling device 2 is directed upward and the rear end is directed downward with respect to the vertical coating surface B, water supplied from the water supply port 2j and the peeling powder As Can be efficiently discharged from the discharge port 2v to the suction device 40.

(5) Furthermore, since the frictional heat of each of the polishing members 30 and 31 can be lowered by the water W supplied from the water supply port 2j to the lower surface of the rotating body 2n, the coating material melted by the frictional heat is removed from the polishing member 30 and 31. It can suppress that it adheres to 31 and polishing capability falls.
(6) Furthermore, since each polishing member 30 and 31 can be cooled by the water W supplied to the coating surface B from the water supply port 2j, the lifetime of each polishing member 30 and 31 can also be extended.
(7) Furthermore, the water W supplied from the water supply port 2j to the lower surface of the rotating body 2n can wash away foreign materials such as coating materials and concrete particles that have entered the inside of the polishing flaw, so that new coating is performed. There is no risk of adverse effects such as uneven paint sometimes.
(8) Furthermore, since the casing 2d can be held with one hand so that the coating material can be peeled off, the workability when the coating material is peeled off can be improved. The burden can be reduced.
(9) Furthermore, since the rotating body 2n is rotated by the air motor 2w, there is a risk of electric shock due to water entering the apparatus during work, such as an apparatus having a structure in which the rotating body is rotated by the electric motor. Absent.

(10) Furthermore, the coating material peeling apparatus 2 includes a first flat surface portion 2a3 in which a part of the peripheral surface of the second cover 2a2 is formed in a planar shape, and a part of the peripheral surface of the third cover 22 It is formed in a planar shape, and includes a second plane part 22b parallel to the first plane part 2a3. In addition, among the plurality of polishing members 30 and 31, a part of each polishing surface 30b of each polishing member 30 protrudes outward from the outer periphery of the rotating body 2n. Further, in the gap 23 formed along the outer peripheral surface of the second cover 2a2 between the outer peripheral surface of the second cover 2a2 and the inner peripheral surface of the third cover 22, the first flat surface portion 2a3 and The outer periphery of the rotating body 2n is exposed from the gap 23a formed between the second flat portions 22b.
That is, the outer periphery of the rotating body 2n is exposed from the gap 23a formed between the first flat surface portion 2a3 and the second flat surface portion 22b, and each polishing member 30 that protrudes outward from the outer periphery. The coating material on the painted surface B can be peeled off by the surface 30b.
Therefore, in the case where there are convex portions or corner portions on the painted surface B, and the outer periphery of the rotating body 2n exposed from the gap 23a is applied to the convex portions or corner portions, the convex portions, corner portions, etc. The coating material painted on can be peeled off.

(11) Further, the water supply port 2j provided in the coating material peeling apparatus 2 sprays water W through any of the plurality of windows 2p, regardless of whether the rotating body 2n is rotating or stopped, and the polishing member 30 and 31 have a function of cleaning the portion from which the coating material has been removed.
Therefore, when the paint stripping operation is completed, the part from which the paint has been removed can be cleaned immediately, and it is not necessary to connect the hose to a water source and clean the removal surface separately. The surface cleaning work efficiency can be increased, and since there is no abrasive powder and it does not scatter, it is not necessary to isolate and cure the work site.
In addition, foreign materials such as coating materials and concrete grains that have entered the inside of the polishing scratches can be washed away, which may cause adverse effects such as uneven coating when new coating is applied to the surface from which the coating material has been peeled off. There is no.

(12) Further, since the first cover 2a1 provided in the coating material peeling device 2 is formed with a suction hole 2a5 through which the outside air A is taken into the space K when the suction device 40 is operated, the space K Since the air flow from the first through the outlet 2v to the suction device 40 can be further improved, the suction force can be further increased.
(13) Furthermore, since the coating material peeling apparatus 2 includes the water amount adjusting device 21 that adjusts the amount of water supplied from the water supply port 2j to the lower surface of the rotating body 2n, every time it is necessary to adjust the amount of water, the coating material peeling device 2 goes to the water source. Since there is no need to adjust the amount of water, the efficiency of adjusting the amount of water can be increased.
In addition, when the coating material is peeled off, water can be saved by reducing the amount of water. Further, when performing the cleaning operation on the removal surface, the cleaning operation efficiency can be increased by increasing the amount of water.

(14) Further, since the soft fourth cover 24 covering the outer peripheral surface is detachably attached to the outer peripheral surface of the third cover 22 provided in the coating material peeling apparatus 2, the peeling operation of the coating material is performed. Since the fourth cover 24 can absorb the vibration generated when performing the operation, the burden on the operator can be reduced.
And since the 4th cover 24 is soft, even if it is a case where the outer peripheral surface of the 4th cover 24 collides with a structure, there is no possibility of damaging a structure.

(15) Furthermore, in a state where the lower end edge 22c of the third cover 22 is in contact with the painted surface B, a third gap S is formed between the second cover 2a2 and the painted surface B, and the first cover And the third gaps 23, S are 0.8 mm or more and 1.2 mm or less, respectively, so that when the suction device 40 is operated, the outside air A is brought into the space K through the first and third gaps 23, S. It can guide efficiently.
Therefore, since the air flow from the space K to the suction device 40 through the discharge port 2v can be further improved, the suction force can be further increased.
Moreover, since the negative pressure in the space K does not become excessively high when the suction device 40 is activated, the coating material peeling device 2 may be adsorbed on the coating surface B, and it may be difficult to perform the coating material peeling operation. Nor. That is, by setting the first and third gaps 23 and S to 0.8 mm or more and 1.2 mm or less, respectively, the coating material peeling device 2 is attracted to the coating surface B when the coating material is peeled off. In addition, the suction force of the peeled coating material can be increased.
Furthermore, since the height H of the inner peripheral surface of the second cover 2a2 is not less than 20 mm and not more than 30 mm, a sufficient volume in the space K can be ensured while increasing the suction efficiency, so that the space K is circulated. It is also possible to prevent the release powder As from leaking from the second gap 26 and the like.

(16) The coating material peeling apparatus 2 and the peeling coating material collection system 1 are all used in a wet state, and the peeling powder As does not scatter during the coating material peeling operation, and dust remains on the removal surface G of the coating material peeling operation. In this state, the coating material can be peeled off.
That is, since the peeling powder As does not scatter in the work environment during the coating material peeling work, there is no possibility that the operator's health is harmed, and the peeling work can be performed safely.
And since it is not necessary to perform the isolation curing for preventing scattering of peeling powder | flour As, work cost can also be reduced.

(17) Furthermore, the collected material collected by the suction device 40 can be separated into solid matter and moisture composed of the peeling powder As in a vacuum state inside the collection bag 41 provided in the suction device 40. Since the solid matter is in a wet state, when the collection bag 41 is taken out from the suction device 40, it is not scattered outside, and the collection bag 41 is accommodated in another bag and sealed in a double bag state. Can be processed.
Furthermore, the water containing asbestos remaining inside the suction device 40 can be filtered and neutralized to a detection limit value or less using the filtration device 17 and the neutralization device 19 and discharged into the natural environment.

1 .... release coating material recovery system, 2 .... coating material peeling device, 2a1 ... first cover,
2a2 ... second cover, 2a3 ... first plane part, 2a4 ... lower edge,
2a5 .. intake hole, 2c .. discharge pipe, 2d .. casing, 2f .. support member,
2h · · · compression coil spring (elastic member), 2j · · water inlet, 2n · · rotating body,
2n1 ·· Rim, 2p ·· Window, 2v ·· Discharge port, 2w ·· Air motor,
21..Water amount adjusting device, 21a..Water amount adjusting lever, 22..Third cover,
22b ··· second plane portion, 22c ·· lower edge, 23 ··· first gap,
24 .. 4th cover, 25 .. Recess, 26 .. 2nd gap,
30, 31 ... Polishing member, 30b, 31b ... Polishing surface, 40 ... Suction device,
A ·· Outside air, B ·· Painted surface, F1 ·· Rotation direction, G ·· Removed surface,
K ・ ・ Space, L1, L2 ・ ・ Line, M ・ ・ Muddy water, P ・ ・ Rotation center, P1 ・ ・ Center,
W ... water, a ... long axis, b ... short axis, θ ... angle.

Claims (7)

A coating material peeling device that peels the coating material applied to the structure and discharges the peeled coating material to a suction device,
A casing that can be held with one hand,
A disc-shaped rotating body that is provided at the front end of the casing, and whose peripheral edge of the lower surface rotates in parallel with the coating surface on which the coating material is coated;
A recess formed from the peripheral edge to the rotation center of the rotating body;
A plurality of windows formed in the rotating body along a rotating direction of the rotating body;
A plurality of polishing members provided on the lower surface of the rotating body for polishing and removing the coating material;
A substantially disc-shaped first cover covering the upper surface of the rotating body;
A second cover having a substantially cylindrical shape that is formed integrally with the first cover and covers an outer peripheral surface of the rotating body;
A substantially cylindrical third cover supported by the first cover and covering an outer peripheral surface of the second cover;
A plurality of support members for supporting the third cover on the first cover at a plurality of locations via an elastic member so as to be movable up and down;
An air motor provided inside the casing for rotating the rotating body;
When the rotating body is viewed from the lower surface, the rotating body is provided on the lower surface of the first cover so as to be exposed from any of the plurality of windows, and the lower surface of the first cover, the upper surface of the rotating body, A water supply port capable of supplying water to the recess through the plurality of windows at any time during rotation and stop of the rotating body,
Of the first cover, water that is formed penetrating at a location near the rear end of the coating material peeling apparatus and that communicates with the space and is supplied from the water supply port to the lower surface of the rotating body. And a discharge port for discharging muddy water mixed with the coating material peeled off from the painted surface by the plurality of polishing members when the rotating body rotates, to the suction device;
A gap formed between the outer peripheral surface of the second cover and the inner peripheral surface of the third cover along the outer peripheral surface of the second cover, and the outside air when the suction device is activated A first gap for taking in,
It is formed between the outer peripheral surface of the rotating body and the inner peripheral surface of the second cover, and guides the outside air taken into the first gap to the space when the suction device is operated. The second gap of
One end is connected to the discharge port, and a discharge pipe disposed on the upper surface of the first cover,
The lower end edge of the second cover is located at a position higher than each lower surface of the plurality of polishing members,
The lower end edge of the third cover is positioned below the lower surfaces of the plurality of polishing members by the elastic force of the elastic member when the lower end edge is not pressed against the paint surface, and When the lower edge is pressed against the coating surface against the elastic force of the elastic member, the lower edge is configured to be able to rise to the same position as the lower surfaces of the plurality of polishing members,
The discharge port is formed in a substantially elliptical shape having a short axis extending in the front-rear direction of the coating material peeling device and a long axis intersecting the short axis,
Further, the center of the first cover and the center of rotation of the rotating body exist on the same axis, a line connecting the center of the water supply port and the center of the first cover, The angle formed by the line connecting the intersection of the short axis and the long axis and the center of the first cover is 180 degrees or more and less than 360 degrees when measured in the rotation direction of the rotating body,
Further, the coating material peeling apparatus is configured so that the coating material can be peeled by holding the casing with one hand. A first planar portion in which a part of the peripheral surface of the second cover is formed in a planar shape;
A part of the peripheral surface of the third cover is formed in a planar shape, and includes a second plane part parallel to the first plane part,
Among the plurality of polishing members, a part of the polishing surface of a predetermined number of polishing members protrudes outward from the outer periphery of the rotating body,
2. The coating material peeling according to claim 1, wherein an outer periphery of the rotating body is exposed from a gap formed between the first and second flat portions in the first gap. apparatus.   The water supply port sprays water through any of the plurality of windows and cleans the portion from which the coating material has been removed by the polishing member, regardless of whether the rotating body is rotating or stopped. It has a function, The coating material peeling apparatus of Claim 1 or Claim 2 characterized by the above-mentioned.   The intake hole for taking in outside air into the space when the suction device is operated is formed in the first cover so as to penetrate therethrough. The coating material peeling apparatus of description.   The coating material peeling apparatus according to any one of claims 1 to 4, further comprising a water amount adjusting device that adjusts the amount of water supplied from the water supply port.   The soft fourth cover covering the outer peripheral surface is detachably attached to the outer peripheral surface of the third cover, according to any one of claims 1 to 5. Coating material peeling device. In a state where the lower end edge of the third cover is in contact with the painted surface, a third gap is formed between the lower end edge of the second cover and the painted surface,
The first and third gaps are 0.8 mm or more and 1.2 mm or less, respectively, and the height of the inner peripheral surface of the second cover is 20 mm or more and 30 mm or less. The coating material peeling apparatus of any one of Claims 1 thru | or 6.

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