JPH0722919B2 - Method and apparatus for cutting / peeling substrate surface coating film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> Tanks, various containers, heat exchangers, etc. are lined with resin or the like on the surface of a substrate such as a metal plate for the purpose of preventing corrosion and preventing product contamination. When the coating film is applied, it is often necessary to partially peel the coating film for repairing the substrate or its coating film or inspecting the substrate later.

The present invention is a substrate for efficiently peeling a coating film on another arbitrary portion (hereinafter referred to as a peeled portion) without damaging the substrate surface and a coating film portion (hereinafter referred to as a non-peeled portion) that should be left without peeling. The present invention relates to a method and apparatus for partially peeling a covering film.

<Prior Art> Conventionally, in the case of the above-described partial peeling operation of the coating film, the coating film is cut along a boundary line between the peeling portion and the non-peeling portion of the coating film with a grinder, and then the peeling portion is removed. The coating film was heated with a burner or the like to melt the adhesive that adheres the coating film to the substrate, and then the coating film was peeled off with a knife or the like, or the entire peeled portion was scraped off with a grinder or sandblast.

<Problems to be Solved by the Invention> However, when a grinder, a sandblaster, or the like is used, not only the coating film but also the substrate surface is easily scratched, and the dust generated causes the working environment to be extremely deteriorated. On the other hand, when the peeled part is heated with a burner, etc., not only peeling easily occurs in the non-peeled part due to overheating near the boundary line with the non-peeled part, but also fire and explosion may occur in the oil tank etc. It is easy to cause the generation of other gas. On the contrary, if the heating is insufficient, the peeling of the peeled portion becomes insufficient. As described above, these conventional methods are very difficult to manage the work, and often require peeling leftover parts to be repaired, which not only increases the construction period and construction cost, but is also unfavorable for safety management. .

Incidentally, as a method for peeling off the coating film, the conventional method is used in Japanese Patent Publication No.
The one disclosed in Japanese Patent Publication can be seen. This is to separate the vinyl chloride coating of a vinyl chloride coated wire from the core wire that is the base material.First, a high-speed fluid jet is applied to the surface of the coating material to form a damaged portion here, and then the damaged portion is A low velocity, large volume fluid jet is applied to tear the coating from the damaged portion and peel it from the substrate. It is possible to apply such a method to so-called partial peeling, which is the object of the present invention, but in that case, the coating film portion (non-peeling portion) remaining without being peeled is also greatly damaged, and the damaged portion is repaired. Without it, it is impossible to use the non-peeling part as it is.

That is, the conventional method discloses a method of roughly peeling the coating film from the base material, but the end surface treatment of the non-peeling portion resulting from tearing the peeling portion from the non-peeling portion is not performed at all, and Even with the peeling means, since the coating film is damaged once and the damaged portion is torn by the next large-capacity low-speed fluid jet, the peeling work is complicated and the workability is poor. It is a thing. Therefore, such a conventional method is not suitable for an accurate partial peeling method.

In order to solve the above-mentioned problems of the conventional method or apparatus, the present invention effectively utilizes the impact force of high-pressure fluid jet, and allows any portion of the coating film to be left on the substrate surface or the coating film portion (non-peeling portion) to be left. The present invention provides a method and an apparatus for safely and efficiently peeling a) without damaging it.

<Means for Solving the Problems> Therefore, in the method of the present invention, at least one cutting high pressure is applied obliquely from the upper position toward the cutting boundary line between the peeled portion and the non-peeled portion of the coating film on the substrate surface. A cutting operation is performed by ejecting a fluid jet while moving along the cutting boundary line to form a substantially tapered cutting boundary surface over the front and back surfaces of the non-peeling portion on the end surface of the non-peeling portion of the coating film. A method of performing a peeling operation of a peeling portion, wherein the direction of the jet flow of the cutting high-pressure fluid is within a plane that includes the cutting boundary line and forms a predetermined acute angle from the substrate surface of the non-peeling portion. In addition, the method of cutting / peeling the substrate surface coating film, which was held in a state of facing rearward with respect to the cutting operation proceeding direction, was used.
Thereby, the cut surface of the non-peeling portion is smoothly formed. Next, for the unnecessary peeling portion, the high-pressure fluid jet for peeling is rotated around the rotation center axis and is jetted to the peeling portion from an obliquely upper position while moving in parallel to the substrate surface. As a result, the coating film is stripped in a strip shape according to the trajectory of the fluid jet.

Further, in the apparatus of the present invention, in order to carry out the above method, a cutting high-pressure fluid jet is jetted from an obliquely upper position toward the cutting boundary line between the peeled portion and the non-peeled portion of the coating film on the substrate surface. And a cutting injection nozzle for ejecting at least one high-pressure fluid jet for cutting the coating film, which forms a substantially tapered cutting boundary surface across the front and back surfaces of the non-peeling portion on the end surface of the non-peeling portion of the coating film. A high-pressure fluid jet for peeling is sprayed from the obliquely upper position to the peeling portion while rotating around the central axis of rotation toward the cutting device and the portion of the cut coating film to be peeled off, and the peeling portion is peeled off. A peeling device, and a supporting device that freely supports the cutting device and the peeling device,
Equipped with. The jet flow direction of the cutting jet nozzle is in a plane that includes the cutting boundary line and forms a predetermined acute angle from the substrate surface of the non-peeling portion, and faces rearward with respect to the transport direction of the cutting device. Keep it in the state.

<Operation> According to the above-described present invention, the high-pressure cutting fluid is moved along the cutting boundary line by the supporting device, and the coating film is cut along the cutting boundary line in a slope shape. By this cutting operation, the boundary cutting surface of the non-peeling portion becomes a slope such that the non-peeling portion becomes a lower layer of the peeling portion, and the thickness is gradually reduced to form a tapered surface reaching the substrate surface. Therefore, the cut portion of the non-peeling portion is not damaged and is not peeled off from the substrate surface. Further, there is no damage on the substrate surface when the coating film is cut.

The cutting work, when moving the cutting high-pressure fluid along the cutting boundary line, the cutting high-pressure fluid from the front obliquely forward to the rear with respect to the cutting work progressing direction, to pass on the cutting boundary line, for this, The peeling region never reaches the non-peeling portion because the cutting boundary surface is blocked. Therefore, the non-peeling part is surely left on the substrate without damage. In the peeling work, a high-pressure fluid jet for peeling is jetted from the obliquely upper position to the peeling portion while drawing a circle around the rotation center axis, and this is moved in parallel. Then, in the peeling portion, the high-pressure fluid jet obliquely enters the peeling portion from an obliquely upper position, and then digs into between the peeling portion and the metal plate to peel the peeling portion. Then, the separation high-pressure fluid jet is combined with the cutting operation of the cutting high-pressure fluid jet to perform a simple one-step process of drawing a swirl pattern and separating the region outside the swirl circle while moving parallel to the metal plate. The band-shaped range of a wide area occupied by the trajectory of the high-pressure fluid jet that draws a swirling flow can be separated at once, and the process can be shortened. At this time, even if the locus of the swirling pattern of the high-pressure fluid jet for separation does not continue in a strict sense in a strip shape,
Since the high-pressure fluid jet peels off the coating film with a certain width, no peeling residue occurs.

<Examples> Examples of the present invention will be described below with reference to the drawings.

FIG. 1 shows an outline of the present invention. In a tank for storing petroleum products such as heavy oil, a metal film 1 such as an iron plate serving as a substrate is coated with a coating film 2 such as a resin coating and a resin lining.
The surface of the metal plate 1 (bottom plate, side plate) is protected.

By the way, it is necessary to partially peel off the coating film 2 in order to repair the metal plate 1 or inspect the metal plate 1.

In such a case, a cutting boundary line 3 is drawn on the surface of the portion (peeling portion) 2A of the coating film 2 to be peeled off, or a registration is made, and the peeling portion 2A is removed by the method according to the present invention. And cut and peel off.

Here, the cut portion of the non-peeling portion 2B must not be peeled from the surface of the metal plate 1 and the cutting boundary surface 4 must not be damaged.

Therefore, for example, a self-propelled support device 5 is made to run on the tank bottom plate, and at least one high-pressure fluid injection nozzle (hereinafter referred to as a cutting injection nozzle) 6 for cutting a coating film, which is provided on the support device 5, At least one coating film peeling high-pressure fluid jet nozzle (hereinafter referred to as peeling jet nozzle) 7
By the above, the coating film 2 is cut and peeled by satisfying the above requirement.

The cutting jet nozzle 6 sets the direction of the jet flow so as to include the cutting boundary line and be within a plane without a predetermined acute angle from the surface of the metal plate in the non-peeling portion. Thereby, a linear high-pressure fluid jet 8 such as a high-pressure water jet is jetted at high speed from above the non-separated portion 2B toward the cutting boundary line 3 with the surface of the metal plate 1 at a predetermined angle θ, for example, 60 ° or less, preferably about 30 °. Then, the coating film 2 is cut along the cutting boundary line 3. The cutting jet nozzle 6 is guided by the supporting device 5 to cause the high-pressure fluid jet 8 to travel along the cutting boundary line 3 to form the cutting boundary surface 4 of the non-peeling portion 2B, and at the same time, to form the cutting boundary surface 2A. The part is peeled from the surface of the metal plate 1.

The cutting jet nozzle 6 is inclined so as to jet the high-pressure fluid jet 8 from the front to the rear in the cutting operation proceeding direction.
As a result, when the high-pressure jet separates the separation area, the cutting between the non-separation area and the separation area has already been completed at the rear of the cutting work progress direction, so the high-pressure jet separates the cut separation area. Even if it tries to sneak into the non-peeling area further, the cutting boundary surface blocks and does not allow it. Therefore, the non-peeling portion can be surely left on the metal plate without damage.

On the contrary, when the cutting jet nozzle 6 is inclined so as to jet the high-pressure fluid jet 8 from the rear to the front in the cutting operation proceeding direction, the high-pressure jet precedes the separation in the separation region on the side not yet cut. As a result, the high-pressure jet flows into the non-separation area via the bottom of the cutting boundary line that is not yet cut, simultaneously with the separation of the separation area, and separates the non-separation portion of the area that is not yet cut. It is easy to do.

The pressure of the high-pressure fluid jet 8 for cutting the coating film, for example, the high-pressure water jet, is preferably at least 1,000 kg / cm ² or more at the nozzle base. For example, the metal plate 1 is an iron plate and the surface thereof is coated with FRP with a thickness of about 2 mm. In this case, about 2,000 kg / cm ² is desirable. However, in general, the strength of the base material of the metal plate 1, unevenness,
The pressure of the high-pressure fluid jet 8 is selected depending on the strength and thickness of the coating film 2.

The cutting boundary surface 4 of the non-peeling portion 2B cut in this way becomes a tapered inclined surface that gradually reduces the thickness and reaches the surface of the metal plate 1, and forms a state in which the peeling portion 2A overlaps the upper layer of the non-peeling portion 2B. To do. The high-pressure fluid jet for cutting hits the surface of the metal plate 1 and bounces back toward the rear peeling portion 2A, so that the tip edge of the cutting edge remains reliably on the surface of the metal plate 1 and is not peeled off, while the peeling portion 2A side is for cutting. Partly largely separated by the high-pressure fluid jet. The surface of the metal plate 1 is not damaged during the cutting and peeling process of the coating film 2.

In the case of the present embodiment, the stripping jet nozzle 7 has four jet holes 7a at the tip and is rotatable about the respective rotation center axes C, as shown in FIGS. 1 and 2. Has become. The high-pressure fluid jets (high-pressure water jets) 8 ejected from the respective injection holes 7a are radially radiated in a conical direction with respect to the rotation center axis C, that is, directed from the obliquely upper position toward the separation portion and away from the rotation center axis C. . Therefore, when the cutting jet nozzle 6 and the rotating peeling jet nozzle 7 are moved parallel to the metal plate along the cutting boundary line 3 by the supporting device 5, as shown in FIG. 3, the non-peeling portion 2B has an inclined cutting boundary. On the other hand, while the surface 4 is formed, after the high-pressure fluid jet 8 is obliquely incident on the peeling portion 2A from the obliquely upper position, the peeling portion 2A is also squeezed between the peeling portion 2A and the metal plate 1 to remove the peeling portion 2A. Peel off. Then, the peeling high-pressure fluid jet 8 moves in parallel with the metal plate 1 while drawing a swirl pattern and stripping the outer region of the swirling circle in combination with the work of cutting the coating film 2 of the cutting high-pressure fluid jet. By simply performing the operation, the coating film having a large area corresponding to the strip-shaped locus of the high-pressure fluid jet is peeled off from the surface of the metal plate 1, thereby shortening the process. At this time, even if the locus of the swirling pattern of the high-pressure fluid jet for peeling is not continuous in a strip shape in a strict sense, the high-pressure fluid jet 8 peels off the coating film with a certain width, so that no peeling residue occurs. Needless to say here, if the number of the injection holes 7a formed in one peeling jet nozzle is plural, the peeling effect is further enhanced, and the number of the peeling jet nozzles is The high-pressure fluid jet for use enters the metal surface obliquely from the obliquely upper position and performs a swirling motion, so it can be reduced compared with the case of a fixed nozzle. It is not a flow rate.

Cutting of the coating film 2 on the tank side wall 1a surface and the bottom wall corner surface
Peeling can also be performed by setting the inclination angles of the cutting jet nozzle 6 and the peeling jet nozzle 7 with respect to the surface of the metal plate as shown in FIG. 4 in exactly the same manner as described above. This setting is performed by simply translating or rotating the supporting portions of both injection nozzles 6 and 7 by 90 °. However, in the corners, the cutting jet nozzles 6 are arranged on both side edges of the coating film of the peeled portion 2A in FIG. 1, but when the work is hindered by the side wall of the tank, one of the cutting jet nozzles 6 is used. You can remove it. In FIG. 4, a solid line shows an example of cutting / peeling work of the coating film 2 on the tank side wall 1a, and a broken line shows an example of cutting / peeling work of a corner portion of the tank bottom wall.

It is clear that the cutting and peeling of the metal plate surface coating film on the tank side wall 1a or the like or the spherical tank and the like may be performed in the same manner as in the case of the substantially flat metal plate.

Next, details of the first embodiment whose schematic configuration is shown in FIG. 1 will be described.

As shown in FIG. 5, a cutting / peeling device 30 for a metal plate surface coating film according to the present invention includes a support device 5 capable of self-propelling an inner bottom wall plate of a tank 31 for heavy oil or the like. Set up outside,
By driving the air motor with the air pressure supplied from the air compressor 32 via the air hose 33, the vehicle is self-propelled. The air pressure also actuates the rotary drive actuator 9 of the stripping jet nozzle 7.

The high-pressure water for cutting / peeling the coating film is pressurized from the water tank 34 by the pressure unit 35 and is cut / peeled by the water hose 36.
While being supplied to 30, the wastewater in the tank 31 is guided to a wastewater treatment device 39 by a drainage pump 37 via a drainage hose 38, and after separating the coating film peeled off here and water, To release.

The support device 5 includes an air hose as shown in FIGS.
It has an air motor 41 connected to 33, and the air motor 41 rotationally drives the wheels 43 via a winding medium such as a chain 42 and a speed reducer to make the supporting device 5 self-propelled. Forward / backward movement and stop of the support device 5 are performed by operating a switching valve device 44 interposed in the air hose 33. 45 is a pressure regulating valve.

The cutting jet nozzle 6 and the stripping jet nozzle 7 are branched from the water hose 36 via the switching valve device 46.
b is connected to inject or stop injection of high-pressure water. Each of the peeling injection nozzles 7 has a rotary drive actuator 9 at the upper end thereof, and when the air pressure supplied from the air hose 33a is introduced into the actuator 9, the peeling injection nozzle 7 can rotate about its axis.

In the supporting device 5, the switching valve device 44, the pressure control valve 45, the switching valve device 46 and the supporting plate 52 are fixed via frames 47 to 49 fixed to the main body 50, and the supporting plate 52 has a nozzle mounting plate 53. Are fixed by a bolt-nut device 55 so that they can be freely attached and detached and the mounting position can be changed. Further, the supporting device 5 has a guide roller 51 on the side.
As shown in FIG. 12, the guide roller 51 guides the travel of the support device 5 along the inner wall of the tank 31.

Next, the mounting structure of the injection nozzles 6 and 7 will be described with reference to FIGS. 9 to 13. In FIG. 9, a supporting plate 52 fixedly attached to the frame 49 constitutes a front plate of the supporting device 5, and
The nozzle mounting bracket 54 and the nozzle mounting plate 53 are fastened together at the bottom of the 52 by a bolt-nut device 55. Two brackets 56a, 56 protruding from the nozzle mounting bracket 54
A screw 57 is rotatably supported on b, and a nozzle support block 58 screwed to the screw 57 by the rotation of the screw 57 is perpendicular to the axial direction of the screw 57, that is, the cutting / peeling work progress direction of the support device 5. Go to and lock nut 59
The position of the nozzle support block 58 is fixed by locking the rotation of the screw 57 by.

The nozzle support arm 61 is rotatably supported by the end wall of the nozzle support block 58, and as shown in FIG.
It has a nozzle angle setting plate 62 and a nozzle support arm 61.
After setting an appropriate angle, the bolt 63 is inserted into the arch-shaped long hole 62a formed in the nozzle angle setting plate 62 and is tightly fixed to the nozzle support block 58, so that the nozzle support arm 61 is at the predetermined angle θ position. Fixedly supported by. The cutting injection nozzle 6 is axially slidably supported by the tip boss of the nozzle support arm 61, and its axial position, that is, the distance from the coating film 2 of the metal plate 1 of the tank is specified by the lock bolt 64. . The cutting injection nozzle 6 is not peeled off from the obliquely upper side toward the rear side with respect to the cutting operation proceeding direction of the supporting device 5 (FIG. 9D).
Is set to be inclined toward the peeled portion 2A.

Therefore, if the injection hole of the cutting jet nozzle 6 is aligned with the cutting boundary line 3, the high-pressure water jet 8 for cutting is jetted by this.
Can be formed into an inclined surface whose thickness is gradually reduced without damaging the cutting boundary surface 4. The inclination angle θ of the cutting jet nozzle 6 and the distance from the coating film 2 are determined by the type of the metal plate base material,
The value is appropriately selected depending on the unevenness and the material and thickness of the coating film 2.

The cutting jet nozzle 7 is mounted on the nozzle mounting plate 53 as shown in FIGS. 11 and 12. That is, on the upper part of the nozzle mounting plate 53, the brackets 71 and 72 provided so as to vertically project in parallel are provided with screws extending in the vertical direction corresponding to a plurality (four in this embodiment) of the peeling injection nozzles 7. The 73 is rotatably supported, and the rotation of the screw 73 is locked by tightening the lock nut 74. A nozzle holder 75 is screwed onto the screw 73 and moves up and down by the rotation of the screw 73. The lock nut 76 locks the nozzle holder 75 with respect to the screw 73. The nozzle holder 75 holds the rotary drive actuator 9 of the peeling jet nozzle 7. With this configuration, the height of the nozzle holder 75 is adjusted by rotating the screw 73,
The distance between the stripping jet nozzle 7 provided at the lower end of the rotary drive actuator 9 and the coating film 2 on the surface of the metal plate is set to an optimum value. An air pressure control valve is provided in the air hose 33a for supplying air pressure to the rotary drive actuator 9, but it is not shown.

As described above, the inclination angle and the distance from the coating film of the cutting jet nozzle 6 are set, and the distance from the coating film 2 of the peeling jet nozzle 7 is set, and as shown in FIG. The coating film 2 on the surface of the metal plate 1 at the bottom of the tank having a predetermined value is peeled off. That is, the cutting jet nozzle 6 forms an inclined cutting boundary surface on the non-peeling portion 2B and cuts the boundary portion of the peeling portion 2A, and the peeling jet nozzle 7 peels the peeled portion 2A from the surface of the metal plate. Of. Then, if the supporting device 5 is self-propelled for a predetermined distance, the coating film can be peeled off in a desired area.

Here, by making the supporting device 5 self-propelled,
The operator does not need an excessive amount of labor even for long-time work. In particular, the self-propelled mechanism is driven by a fluid motor as in this embodiment, so that the traveling speed can be easily and steplessly adjusted, and since the internal combustion engine or the electric motor is not used, it can be used even in a flammable or explosive gas atmosphere. Further, if the fluid used is the same as the high-pressure fluid for cutting and peeling,
It is also possible to consolidate the supply power sources into one.

As a modification, the high-pressure water sprayed from the spray nozzles 6 and 7 and the cut / peeled coating film scraps can be taken out of the tank 31 by providing a waste collection device 80 as shown in FIG. it can. That is, the waste collection device 80 is supported by the nozzle mounting plate 53, and the splash cover 8 that surrounds each of the injection nozzles 6 and 7.
A skirt 82 made of rubber or the like is attached to the lower edge of 1 to prevent high-pressure water from splashing around. Then, the drain hose 38 connected to the drain pump 37 provided outside the tank 31 is inserted into the splash cover 81 through the lower gap, and water and coating film waste are sucked, and water is separated in the drain treatment device 39. Drain afterwards.

The cutting and peeling work of the coating film on the corner of the bottom wall of the tank 31 is performed as shown in FIGS. 14 and 15. That is, the bracket 54 'that opposes and interferes with the side wall of the tank 31 is removed from the bolt-nut device 55, and only the bracket 54 on the side far from the side wall is left on the nozzle mounting plate 53. In other words, this means that the cutting injection nozzle 6 on the side closer to the tank side wall 1a is removed from the support device 5, and the bottom wall corner of the tank 31 is easily removed by the peeling injection nozzle 7 as shown in FIG. The coating film 2 can be peeled off. At this time, needless to say, the guide roller 51 may be removed, or the position of the guide roller 51 may be movable inward.

The side wall 1a of the tank 13 is cut and peeled off, especially on the surface of the lower corner, as shown in FIGS. 16 and 17. That is, the support plate 52
Bolt holes 85 and 8 are provided in the lower part and corresponding parts of the nozzle mounting plate 53, respectively.
6 is drilled, the nozzle mounting plate 53 is tilted 90 ° to align these bolt holes 85 and 86, and the bolt-nut device 5
Wear 5. Therefore, the nozzle mounting plate 5
3 is laid down at a right angle, and in this state the lower nozzle mounting bracket is removed and the upper nozzle mounting plate 53 is left. As a result, as shown in FIG. 17, the peeling jet nozzle 7 from which the lower cutting jet nozzle 6 is removed is made substantially horizontal and is made to face the side wall 1a at a substantially right angle. Side wall in this way
The coating film 2 of 1a can be cut and peeled off similarly to the case of the bottom wall.

Needless to say, the number of the ejection nozzles 7 can be appropriately increased or decreased depending on the work because the peeling ejection nozzles 7 can be attached and detached.

<Effects of the Invention> As described above, according to the present invention, the following effects are brought about.

That is, A. Boundary line separation of the coating film peeling is performed by the impact force of the high-pressure fluid jet over the front and back surfaces of the coating film, a. The coating film is completely cut and the surface of the substrate is prevented from being damaged. Moreover, it is not necessary to carry out a base treatment at the time of recoating.

b. Since no fire is used for heating, there is no danger of flame or explosion, nor is there a risk of producing toxic gas.

c. Since we do not use grinders or sandblasts,
Does not generate dust and does not deteriorate the working environment.

d. Since the same type of high-pressure fluid jet can be used for cutting the boundary line and peeling of the coating film peeling, the simultaneous work of cutting and peeling can be efficiently performed by one device and one operator.

B. The high-pressure fluid jet for cutting the coating film is placed at a specific angle on the cutting boundary line of the peeling portion, that is, in a plane that forms a predetermined acute angle from the substrate surface of the non-peeling portion and behind the cutting work proceeding direction. By keeping it facing and spraying diagonally, there is no risk of peeling or other damage to the non-peeling part.

b. The cutting boundary surface of the non-peeling part has a smooth finish with an inclination.

c. Therefore, the recoating work of the peeled part can be performed smoothly without damaging the non-peeled part.

d. By separating the jetting direction of the high-pressure fluid jet for cutting the coating film to the rear side with respect to the advancing direction of the peeling work, the peeling of the non-peeling portion can be more completely prevented.

C. The cutting boundary surface of the non-peeling part is formed without damage, and the peeling part is further peeled by the peeling work. A. The high-pressure fluid jet for peeling adheres to the metal plate of the non-peeling part along with the peeling work. Even if an attempt is made to invade the surface, the cutting boundary surface is formed in a taper shape, so that the high-pressure fluid jet for separation cannot easily slip into the lower surface of the non-separation portion, and therefore the separation work can be performed safely only on the separation portion. be able to.

D. In the peeling work, the peeling high-pressure fluid jet is inclined toward the peeling portion in a direction away from the obliquely upper position with respect to the rotation center axis, and the peeling high-pressure fluid jet is circularly moved around the rotation center axis and the substrate is moved. Since spraying is performed on the peeling portion while moving parallel to the surface, a. The coating film is continuously and stripped in the region corresponding to the locus of the circular motion and horizontal motion of the peeling high-pressure fluid without any peeling residue of the coating film. It is possible to peel off the coating film.

b. The conventional two-step peeling work of first damaging the coating film and then peeling the coating film is unnecessary, and a wide range of strip-shaped peeling is possible with a simple work. Therefore, the construction period and construction cost can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view for explaining the main part showing an outline of one embodiment of the present invention, FIG. 2 is a front end view of a peeling injection nozzle, and FIG. 3 is a sectional view taken by the embodiment apparatus shown in FIG. FIG. 4 is a plan view showing the state of the peeled coating film on the surface of the metal plate, and FIG. 4 shows cutting and peeling work of the coating film on the tank side wall and the even wall by using the apparatus of the embodiment shown in FIG. 1 or its modification. FIG. 5 is a sectional view for explanation, FIG. 5 is an overall system diagram showing an arrangement example of the embodiment apparatus shown in FIG. 1, FIG. 6 is a side view of the embodiment apparatus shown in FIG. 1, and FIG. FIG. 8 is a plan view, FIG. 8 is a front view of the same as above, FIG. 9 is an enlarged cross-sectional view taken along the line XIV-XIV of FIG.
XV-XV arrow view of the figure, FIG. 11 is a front view showing the support mechanism of the peeling injection nozzle, FIG. 12 is a side view of the same, FIG. 13 is a schematic explanatory view showing the attachment state of the splash cover, Fig. 14 is a front view showing the mounting relationship of the support plate, the nozzle mounting plate and the nozzle mounting bracket when the coating film peeling work near the corners of the bottom wall of the tank is performed, and Fig. 15 is the same as that of Fig. 8 for performing the same work. FIG. 16 is a front view showing an operating state of the cutting / peeling device, FIG. 16 is a front view showing a mounting relation of a support plate, a nozzle mounting plate, and a nozzle mounting bracket when performing a coating film peeling work on a tank side wall,
FIG. 17 is a front view showing an operation state of the cutting / peeling device shown in FIG. 8 showing the same work. 1 ... Metal plate, 2 ... Coating film, 3 ... Cutting boundary line, 4 ...
... Cutting interface, 5 ... Support device, 6 ... Cutting jet nozzle, 7 ... Stripping jet nozzle, 8 ... High-pressure fluid jet, 30
...... Cutting / peeling device, 31 …… Tank, 41 …… Air motor, 43 …… Wheels, 47,48,49 …… Frame, 50 …… Main body,
52 …… Support plate, 53 …… Nozzle mounting plate, 54 …… Nozzle mounting bracket, 57,73 …… Screw, 58 …… Nozzle support block, 61 …… Nozzle support arm, 62 …… Nozzle angle setting plate, 62a ...... Long hole, 71,72 …… Bracket, 75 …… Nozzle holder, 80 …… Waste collection device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Yanashita 103 Oguchi-dori, Kanagawa-ku, Yokohama, Kanagawa Prefecture (72) Inventor Minoru Iijima 418-1, Kingasaku, Matsudo-shi, Chiba Inventor Hideyuki Nozaki Edogawa, Tokyo Kasai 5-11-25 (72) Inventor Takehiko Takao 32-5 Sakaemachi, Itabashi-ku, Tokyo (72) Inventor The Gerard F Wallace United States 98032 (Seattle) South Kent Avenue 21246-68 (56) References Special Kai 61-230900 (JP, A) JP 51-38067 (JP, B2)

Claims (10)

[Claims] 1. At least one cutting high-pressure fluid jet is moved along the cutting boundary line from an obliquely upper position toward the cutting boundary line between the peeled portion and the non-peeled portion of the coating film on the substrate surface. While spraying, a cutting operation is performed by forming a substantially tapered cutting boundary surface over the front and back surfaces of the non-peeling portion on the end surface of the non-peeling portion of the coating film, and then performing a peeling operation of the peeling portion. There, the jet direction of the cutting high-pressure fluid, including the cutting boundary line, in a plane forming a predetermined acute angle from the metal plate surface of the non-peeling portion, and in a state of facing the rear with respect to the cutting operation progress direction In the peeling operation, at least one high-pressure fluid jet for peeling is circularly moved around the rotation center axis and is parallelly moved on the substrate surface, and is jetted to the peeling portion while inclining from an obliquely upper position. A method for cutting / peeling a substrate surface coating film, characterized by: 2. The separation high-pressure fluid jet is directed so as to incline in a direction away from a central axis of rotation from an obliquely upper position toward the separation portion. The method for cutting / peeling a substrate surface coating film according to. 3. The substrate surface according to claim 1, wherein the separating high-pressure fluid jet is a plurality of jets offset by an equal distance with respect to the rotation center axis. Method of cutting and peeling coating film. 4. The cutting operation is performed by moving the high-pressure cutting fluid jet on the cutting boundary line while maintaining an angle of about 60 degrees or less with the surface of the substrate.
Cutting of the substrate surface coating film according to any one of item 3
Peeling method. 5. A non-peeling coating film is produced by jetting a high-pressure cutting fluid jet from an obliquely upper position toward a cutting boundary line between a peeling portion and a non-peeling portion of the coating film on the substrate surface. A cutting device provided with a cutting injection nozzle for forming a substantially tapered cutting boundary surface on the partial end surface extending over the front and back surfaces of the non-peeling portion, and at least one high-pressure peeling while circularly moving toward the peeling portion of the coating film. A peeling device including a jet nozzle for peeling, which jets a fluid jet from the obliquely upper position to the peeling portion and peels the peeling portion, and a supporting device which freely supports the cutting device and the peeling device, The direction of the jet flow of the cutting jet nozzle is in a plane that includes the cutting boundary line and forms a predetermined acute angle from the surface of the metal plate of the non-peeling portion, and faces rearward with respect to the transport direction of the cutting device. That I kept it in a state A cutting and peeling device for the characteristic substrate surface coating film. 6. A peeling injection nozzle is provided with at least one injection hole around a rotation center axis, and the direction of the injection hole is a direction from an obliquely upper position toward the separation portion and away from the rotation center axis. The device for cutting / peeling a substrate surface coating film according to claim 5, wherein the device is inclined. 7. The substrate surface coating film according to claim 5, wherein the cutting device includes a positioning device for setting a distance and an angle of the cutting jet nozzle with respect to the substrate surface. Cutting / peeling device. 8. The supporting device is a device for moving both the cutting device and the peeling device in parallel to the surface of the substrate along the cutting boundary line, according to any one of claims 5 to 7. The device for cutting / peeling a substrate surface coating film as described in 1. 9. The cutting / peeling device for a substrate surface coating film according to claim 5, wherein the supporting device includes a self-propelled device. 10. The support device according to claim 5, wherein the support device includes a sucking device that covers the high-pressure fluid jet regions of the cutting device and the peeling device and sucks the fluid on the surface of the substrate. Substrate surface coating film cutting / peeling device.