JP2002030409A - Automatic thermal-spraying apparatus and method for forming complexed film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic thermal-spraying apparatus by which the thermal-spraying can be applied onto the thermal-spraying surface having an optional inclining angle at a site. SOLUTION: A thermal-spraying gun 1 is supported to a frame 2 so as to be freely reciprocated in a traversing direction and the frame 2 is shifted in the pitch direction along the rails 3a, 3b composed of a simple tube for scaffold. Rollers 71, 73 are rollingly moved just above the rails 3a, 3b by adjusting and fixing an angle around the pitch direction of casters 4, 6 for shifting the frame 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an automatic spraying apparatus for spraying steel structures such as bridges and tanks, and a method for forming a composite coating.

[0002]

2. Description of the Related Art Generally, in the thermal spraying process, in order to obtain a coating performance such as adhesion strength and thermal sprayed film thickness as required,
It is necessary to perform spraying accurately at a predetermined spraying distance, spray gun moving speed, overlapping width, spraying angle and transition time. In particular, more accurate thermal spraying is required for forming a composite coating such as a laminated coating or a mixed coating using a plurality of types of thermal spray materials.

[0003] In a factory, accurate thermal spraying is performed using an installed articulated robot. However, large structures such as bridges and tanks require thermal spraying on site, so that thermal spraying may be performed manually. In many cases, there is a possibility that the required coating quality cannot be obtained. In addition, manual spraying involves heavy labor and danger due to a requirement to complete the spraying operation within a predetermined time after blasting, dust fumes, noise, electromagnetic waves, generated ozone, and the like.

On the other hand, Japanese Utility Model Laid-Open Publication No. 4-25272 discloses a portable automatic spraying apparatus for on-site work as shown in FIG. This automatic thermal spraying apparatus includes a frame 104 moving along a rail 103 attached to a wall 101 or a floor 102, and a thermal spray gun 105 running along the frame 104.
Is automatically sprayed.

[0005]

However, such an automatic spraying apparatus has a problem of spraying a surface having an arbitrary inclination. Also, in the spraying in the factory, the problem that the sprayed film thickness tends to be non-uniform when shifting from the preceding spraying line to the next spraying line, or it is difficult to freely adjust the ratio of each sprayed material of the mixed coating. There is a problem that.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic spraying apparatus for spraying a surface having an arbitrary slope on site, an automatic spraying apparatus capable of making a sprayed film thickness uniform, and a method for forming a composite coating. I do.

[0007]

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a method for mounting a frame for supporting a spraying gun on a ceiling, a floor, or any inclined plane using rails assembled on site in a pitch direction orthogonal to a traverse direction. The present invention provides an automatic spraying device that can be arranged in parallel to the surface. In this automatic spraying apparatus, a spray gun is reciprocated in a traverse direction along a frame while spraying a spray material on a surface to be sprayed, and spraying is performed while moving the frame along a rail.

Here, the traverse direction refers to the direction in which the spray gun reciprocates along the frame, and the pitch direction refers to the length direction of the rail orthogonal to the traverse direction.

In the present invention, at both ends of the frame in the traverse direction, casters each comprising a roller capable of rolling on a rail and a bracket rotatably supporting the roller around the roller axis are arranged. Is rotatably supported around a roller axis and an axis perpendicular to the traverse direction with respect to the frame, and can be fixed at a predetermined angle. In addition, the rollers are located directly above the rails, so that the rollers can be prevented from slipping off the rails.

By the way, a temporary scaffold for performing blasting or the like is often installed as a pretreatment at the thermal spraying construction site. It is necessary to remove this temporary scaffold so that it does not hinder the installation of rails and the use of automatic spraying equipment at the time of thermal spraying, but if a single pipe for scaffolding is attached to the temporary scaffold and it is a rail for running automatic spraying equipment, Removal of the temporary scaffolding and installation of the rail support can be omitted, thereby reducing the working time and cost. In addition, the single pipe for scaffolds is used for temporary scaffolds, and materials can be easily obtained and attached to the temporary scaffolds.

When the rails are assembled on site, some installation errors cannot be avoided, and there is a risk that one of the casters will rise off the rails and become unstable due to uneven rail height. Therefore, if two casters are arranged on one side in the traverse direction of the frame and one caster is arranged on the other side,
Even if the rail height is not uniform, the casters are supported at three points on the same plane, so that the casters can be prevented from floating.

When the rollers of the two casters on one side are hourglass rollers, lateral displacement of the frame with respect to the rail and rotation of the entire frame around the vertical direction can be prevented. The hourglass roller itself easily follows the rotation around the vertical direction, and does not derail even if the rail is slightly curved. On the other hand, if the roller of one caster on the other side is a flat roller,
Horizontal installation errors of the rails can be absorbed.

When the surface to be sprayed is a curved surface, the rails must be curved in order to run the frame at a constant distance from the curved surface. If the rail is curved,
The two hourglass rollers running along this rail must be arranged at an angle along the curved rail. Therefore, if the caster bracket with a drum-shaped roller can be swung around an axis parallel to the traverse direction and can be fixed at a predetermined angle in accordance with the curvature of the rail, the direction of the drum-shaped roller can be changed. Can be adjusted to the direction of

When the casters provided at both ends of the frame in the traverse direction are positioned just above the rails and sprayed on the ceiling or overhang, the two rails may hinder the setting of the frame in some cases. . On the other hand, when spraying on a floor or an inclined surface, casters and rails hinder the spraying, so that the entire length of the frame cannot be used effectively.

Therefore, at least one of the casters at both ends in the traverse direction of the frame is connected to the frame via a caster supporting member, and the caster supporting member, the frame and the caster are rotatably and predeterminedly fixed. It can be fixed at an angle. By doing so, the caster support material is arranged in the non-spray direction, and at least one caster can be arranged at a position away from the frame in the non-spray direction, and when spraying on the ceiling or overhang, the rail and The space between the surface to be sprayed can be widened and the frame can be easily set. In addition, when spraying on a floor or an inclined surface, casters and rails do not hinder the spraying.

When the surface to be sprayed is substantially vertical, the frame is also in a vertical state, so that it is difficult to stably support the frame. In this case, when an additional member with a roller for vertically supporting the frame in the non-spraying direction on one side (floor side) of the frame is attached, the L-shaped structure is constituted by the additional member and the frame, thereby stabilizing the frame. I can support it. If this additional member can be swung around the roller axis of the caster and an axis perpendicular to the traverse direction and can be fixed at a predetermined angle with respect to the frame, the installation error of the two rails installed on the floor side is absorbed. To make the frame parallel to the surface to be sprayed.

At this time, if a truss structure is provided by providing a frame supporting member for connecting the additional member and the frame, the frame can be reliably prevented from overturning. By making the additional member detachable, when the surface to be sprayed is other than a substantially vertical surface, it can be removed so as not to be in the way.

By the way, irrespective of the on-site spraying and the factory spraying, the spray gun reciprocating in the traverse direction moves in the pitch direction, and the sprayed film thickness becomes nonuniform when shifting from the preceding spraying line to the next spraying line. Easy to be. For example, when the spray gun moves in the pitch direction when it reaches the upper or lower limit in the traverse direction, and when the gun moves back in the traverse direction after the movement in the pitch direction stops, the upper or lower limit is set by the amount sprayed when moving in the pitch direction. Becomes thicker. In particular, when the moving speed in the pitch direction is lower than the moving speed in the traverse direction, the unevenness of the sprayed film thickness becomes remarkable. The thermal spraying line refers to a thermal sprayed film thickness formed by moving the thermal spraying gun from the lower limit to the upper limit or from the upper limit to the lower limit in the traverse direction.

When the spray gun reaches the upper or lower limit in the traverse direction, the spray gun is moved in the pitch direction by the same distance as the width of the effective pattern, and is instantaneously folded back in the traverse direction. Only the thickness can be prevented from increasing. Note that the effective pattern is a portion of the sprayed wire where a predetermined sprayed film thickness is secured.

However, until the transfer of the spray wire is completed, the forward and backward paths of the spray gun overlap, and the sprayed film thickness increases. Further, since the spray gun travels on the return path before the transfer of the spray line is completed, the sprayed film thickness near the starting point of the next spray line becomes thin. That is, the thickness of the sprayed film increases near the end point of the spray line, and decreases near the start point.

Therefore, spraying is performed using two spraying guns arranged side by side in the pitch direction, and a uniform sprayed film thickness is obtained by blowing the thick and thin portions of each sprayed film. If the distance between the spraying centers of the spraying guns is the same as the width of the effective spraying pattern, the forward path of the preceding spraying gun and the backward path of the succeeding spraying gun overlap in the pitch direction. And the thin part overlap.

Further, when different spraying materials are supplied to the preceding spraying gun and the succeeding spraying gun in the pitch direction, different spraying materials are laminated on the first and second layers, and the advantages of each spraying material are utilized. Thus, it is possible to form a laminated coating as a composite coating that compensates for the disadvantages.

By simultaneously spraying dissimilar metals to the same position on the surface to be sprayed from two spray guns that can reciprocate in the traverse direction, a mixed film in which dissimilar metals are mixed can be formed. The mixed coating makes use of the advantages of the respective thermal sprayed materials to make up for the disadvantages similarly to the laminated coating. The formation of the mixed coating can be performed by supplying two types of thermal spraying materials to one thermal spraying gun. However, if two thermal spraying guns are used, the ratio of each thermal spraying material can be freely adjusted.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of the automatic spraying apparatus of the present invention with an additional member attached, FIG. 2 is a front view, and FIG.
4 is a sectional view taken along line BB, and FIG. 5 is a sectional view taken along line CC.

This automatic spraying apparatus comprises a frame 2 for supporting a spray gun 1, a first caster 4 moving along a rail 3a, and a second caster moving along a rail 3b when the surface 5 to be sprayed is vertical. 6, an additional member 7 for connecting the second caster 6 and the frame 2, an additional member 7 and the frame 2
, A frame support member 8 for preventing the frame 2 from overturning, a third caster 9 used when the sprayed surface 5 is not vertical, and a caster support member 10 for connecting the third caster 9 and the frame 2. And

The frame 2 has two traversers 11 arranged side by side in the pitch direction (P) and supporting the spraying gun 1 reciprocally in the traverse direction (T), and one side of the two traversers 11 in the traverse direction. Frame lower member 12 for connecting
And a frame upper member 13 connecting the other sides of the two traversers 11 to form a rectangular frame.

Each traverser 11 is made of aluminum having a substantially rectangular cross section, and is sandwiched by a traverse slider 14 back and forth so as to be slidable in the traverse direction.
Between the traversers 11, a gun table 15 having both edges bent in the other direction is disposed, and the bent piece and the traverse slider 14 are fixed. A gun holder 16 is attached to the gun table 15 via a projection 17 so as to be rotatable around the traverse direction.

The spray gun 1 reciprocating in the traverse direction is provided outside one traverser 11 near one side and the other side.
Limit switches 18 and 19 are provided for detecting the arrival at the lower and upper limits. The tip of each of the limit switches 18 and 19 is protruded from the front surface of the traverser 11, and when it comes into contact with a switch 20 provided on the traverse slider 14, its arrival is detected.

In the vicinity of the center of the traverser 11, a spool support frame 21 having a U-shaped fieldend structure is provided so as to sandwich the outer sides of the two traversers 11 in the pitch direction at both ends. ing. On the rear side of the spool support frame 21, a spool support member 22 formed of a U-shaped plate is provided so as to connect the upper and lower members of the spool support frame 21, and the spool 23 is supported on the front and back of the upper and lower corners. ing.

The thermal spray gun 1 sprays a thermal spray material such as zinc or aluminum onto the surface 5 to be sprayed, and is held by a gun holder 16. The spray material is wire 2
The wire 4 is wound around a spool 23 and supplied to the spray gun 1 through a wire tube 25. The wire tube 25 is composed of a wire tube support plate 26 that connects the upper and lower members of the spool support frame 21 and a flexible rubber-like elastic body whose both ends are supported by the spray gun 1, and moves the spray gun 1 in the traverse direction. The length can be followed.

The frame lower member 12 is made of aluminum having a box-shaped cross section, and has, at both ends thereof, first casters 4a and 4b each comprising a drum-shaped roller 71 and a bracket 72;
A caster retractable support 27 for connecting to the frame 2 is provided. The caster retractable support member 27 is rotatable around an axis and is capable of adjusting and fixing the angle of the bracket 72, and is swingable around an axis parallel to the traverse direction and can be adjusted and fixed at a predetermined angle. The pivoting portion 29 is adjusted to adjust the angle around the pitch direction of the bracket 72, and the pivoting portion 29 is adjusted to adjust the angle of the bracket 72 with respect to the pitch direction. Have been to be.

One of the hourglass rollers 71a has a pitch drive motor 30 for rotating the hourglass roller 71a.
Are connected to move the frame 2 in the pitch direction along the rail 3a. The other hourglass roller 7
1b is adapted to roll along the rail 3a as the frame 2 moves.

The frame lower member 12 and one of the traversers 1
An aluminum overhanging material 31 is formed at the intersection of the traverse drive motor table 32 and the traverser 11 at the intersection of the lower frame member 12 and the other traverser 11. The additional members 7 are formed on the non-sprayed side and can be detachably attached to their tips.

The additional member 7 is made of aluminum formed in a U-shape from an additional member main body 33 and two cantilever members 34, and the tip of the cantilever member 34 has an overhang 31 and a traverse drive motor table 32. It is attached and detached. This additional member 7
Supports the second caster 6 composed of the flat roller 73 and the bracket 74, and the frame 2 is stably supported by the second caster 6 and the first casters 4a and 4b. The flat roller 73
Rolls on the rail 3b as the frame 2 moves.

An attachment / detachment portion 35 between the frame 2 and the additional member 7
Is the overhang material 31 and the traverse drive motor table 3
2, a concave ring 36 formed at the distal end, a convex ring 37 formed at the distal end of the cantilever 34, a pin 38, and a rotation preventing member 39. When the concave ring 36 and the convex ring 37 are engaged with each other, and the pin 38 is inserted from the side with the rotation preventing member 39 interposed therebetween, the additional member 7 is inserted into the frame 2.
The mounting angle can be adjusted.

Here, the rotation preventing device will be described. 6 is a perspective view of the rotation preventing device, FIG. 7 is a perspective view of parts of the rotation preventing device, and FIG. 8 is a sectional view of the rotation preventing device attached to the ring and the pin. As shown in FIG.
Outer ring 40, inner ring 41 and nut 42
And a ring spring 43. FIG. 7 shows a state in which some outer rings 40 have been removed so that the inside can be seen.

The outer ring 40 is formed by dividing a ring having a tapered inside into four parts, and has a groove 44 on the outer periphery in which a ring spring 43 is disposed so as to surround and fix the inner ring 41. . The inner ring 41 is formed by forming a slit 45 in the axial direction on a ring tapered on the outside, and a nut 42 is screwed on the outside on one side in the axial direction. The taper of the outer ring 40 and the taper of the inner ring 41 have the same gradient so that when they are assembled, they become cylindrical.

The outer ring 40 and the nut 42 are formed with engaging portions 46 and 47 for engaging with each other. When the nut 42 is rotated, the outer ring 40 moves in the axial direction with respect to the inner ring 41. . At this time, the outer ring 40 is pushed outward by the taper,
The inner ring 41 is pushed inward and narrowed.

When the rotation preventing member 39 is interposed between the concave ring 36 and the convex ring 37 and the pin 38, the concave ring 36 and the pin 38 are fixed, and the convex ring 37 and the pin 38 are fixed. Therefore, the rotation of the concave ring 36 and the convex ring 37 via the pin 38 can be prevented.

The cantilever 34 of the additional member 7 is connected to the traverser 11 by the frame supporting member 8 to form a truss structure composed of the frame 2, the additional member 7 and the frame supporting member 8, and prevents only the frame 2 from overturning. I do. The connection position between the cantilever 34 and the frame support member 8 can be adjusted according to the mounting angle of the additional member 7. As a method, a flange 4 for closing a part of the opening is provided on the surface of the cantilever 34.
8 is formed, and the connector 50 attached to the frame support member 8 is slid along the groove 49.

More specifically, as shown in FIG.
The head 52 of the bolt 51 is inserted from the end face of the connector 4, and the connector 50 is fixed with the bolt 51 and the nut 53. When the nut 53 is loosened, the connection position can be slid. The cross-sectional shape of FIG. 9 increases the rigidity of each surface of the member, so that the thickness of each surface can be reduced to reduce the weight of the member.
Also used for.

The upper frame member 13 is connected to the lower frame member 12.
It is a rectangular box made of aluminum with an open side,
At the center of the non-sprayed side, a caster support member 10 that supports the third caster 9 including the flat roller 75 and the bracket 76 is provided. The angle of the bracket 76 with respect to the caster support member 10 can be adjusted and fixed, and the angle of the caster support member 10 with respect to the frame upper member 13 can be adjusted and fixed. The bracket 76
The means for preventing the rotation of the caster support 10 and the caster support 10 and the means for preventing the rotation of the caster support 10 and the frame upper member 13 are the same as the means for preventing the rotation of the additional member 7 and the frame 2. It is.

A total of four shafts 54 are arranged inside the lower frame member 12, between the inside of the bracket 31 and the outer wall of the traverse drive motor table 32, and inside the upper frame member 13. . This shaft 54
Has two pulleys 55 each, and supports two chains 56 for reciprocating the thermal spray gun 1 in the traverse direction.

The traverse drive motor table 57 is provided with a traverse drive motor 57 for rotating the shaft 54a via a belt 58 and a pulley 59 provided on the shaft 54a. Chain 56 and gun table 15
When the shaft 54a rotates and the chain 56 rotates, the gun table 15 moves in the traverse direction. The line on the non-sprayed side of the chain 56 has a grooved aluminum chain support 6.
0 is disposed, and the chain 56 is located inside the chain 56 to prevent lateral vibration of the chain 56.

Next, a method for setting the automatic spraying apparatus will be described. First, the case where the sprayed surface 5 is almost vertical will be described. In this case, the rail 3a on which the drum-shaped roller 71 rolls and the rail 3b on which the flat roller 73 rolls are set at substantially the same height, and are arranged parallel to the surface 5 to be sprayed. For the rail 3, a single pipe for scaffolding is used, and is disposed on a horizontal member of a single pipe scaffold or on a single pipe for scaffolding 61 which is horizontally arranged at a predetermined height on a frame scaffold and perpendicular to the sprayed surface 5. . As shown in FIG. 10, when a well-known clamp 77 used for assembling a single pipe scaffold is welded to the bottom of the rail 3 and used for attaching to a horizontal member or a single pipe 61 for a scaffold, the clamp 77 becomes a roller 7.
It does not hinder the rolling of 1,73.

Then, the extension member 31 and the concave ring 36 at the tip of the traverse drive motor table 32 engage with the convex ring 37 at the tip of the cantilever 34, and the additional member 7 is attached to the frame 2. At this time, the rotation preventing device 3
The nut 42 is made rotatable without being strongly tightened.

One end of the frame supporting member 8 is connected to the traverser 1
1 and the other end of the frame support member 10
To connect the additional member 7 and the frame 2. The connection between the frame support member 8 and the cantilever 34 utilizes a bolt 51 into which a head 52 has been inserted from the end face of the cantilever 34.

The drum-shaped roller 71 and the flat roller 73 are aligned with the rail 3, and the connection position between the frame support member 8 and the cantilever 34 is slid along the cantilever 34 so that the frame 2 is parallel to the surface 5 to be sprayed. Adjust so that At this time, the angle of the bracket 72 of the first caster 4 is adjusted by rotating the shaft rotating portion 28 of the caster retractable support 27 so that the hourglass roller 71 rolls directly above the rail 3a. .

The nut 53 is tightened to prevent the connecting member 50 from sliding, and the nut 42 of the rotation preventing member 39 is tightened to prevent the additional member 7 from rotating. The rail is 3c,
When it is bent as in 3d, the swinging portion 29 of the caster retractable support 27 is adjusted so that the direction of the bracket 72 matches the direction of the rail 3c.

Next, a method of setting the automatic spraying apparatus when the surface to be sprayed 5 is not vertical will be described. FIG. 11 is a layout view of the automatic spraying apparatus when the surface to be sprayed is a floor, and FIG.
Is a layout view of the automatic spraying device when the sprayed surface is an inclined surface, FIG. 13 is a layout diagram of the automatic spraying device when the sprayed surface is an overhang surface, and FIG. 14 is an automatic layout when the sprayed surface is a ceiling surface. It is an arrangement view of a thermal spraying device.

In these cases, the third caster 9 is used in place of the second caster 6 by removing the additional member 7. For the rail 3, a single pipe for a scaffold with a clamp 77 welded to the bottom is used, and a single pipe bracket 68 attached to the single pipe scaffold 63.
Or on a horizontal member of the single pipe scaffold 63. In addition, rail 3
Is set using a guide scale.
For example, as shown in FIG. 15, when the single pipe scaffold 63 is assembled on the frame scaffold 62 and the rails 3 are arranged when the sprayed surface 5 is the ceiling surface, as shown in FIG. The height and the position of the rail 3 are set using the guide scale 64.

The guide scale 64 is made of a wooden plate indicating an area occupied by the automatic thermal spraying device, and is used to check in advance whether or not there is an obstacle when operating the automatic thermal spraying device. A projecting plate 65 indicating the spraying range and the distance from the surface to be sprayed is brought into contact with the surface 5 to be sprayed, and a point 6 indicating the position of the rail
The height and the plane position of 6a and 66b are measured using the swing-down 67, and the rail 3 is installed.

When setting the automatic thermal spraying apparatus, the angles of the first and fourth casters 4 and 9 around the pitch direction are adjusted so that the rollers 71 and 75 roll just above the rail 3. The caster support member 10 is rotatable with respect to the frame 2, and its angle is adjusted so as to avoid obstacles, thereby preventing the caster support member 10 from rotating. The operation method of the automatic spraying device is the same as that in the case where the surface to be sprayed is vertical.

According to the above configuration, the rail can be installed using the single pipe for the scaffold, which is easy to obtain and assemble the material. Then, when either the second caster 6 or the third caster 9 is selected and the angles of the casters 6, 9 are adjusted, thermal spraying can be performed on the surface to be sprayed having an arbitrary inclination angle. In addition, even when the rail is bent according to the surface to be sprayed, the direction of the caster 6 can be matched with the direction of the rail, so that derailment can be prevented.

Next, the operation of the spray gun 1 will be described. When this automatic spraying device is operated, the spraying gun 1a,
Two wires 24 are respectively supplied to 1b, and are moved in the traverse direction and the pitch direction while spraying by generating an arc to spray over the entire surface 5 to be sprayed.

FIG. 17 shows the operation of one thermal spray gun 1.
When the traverse drive motor 57 is driven, the spray gun 1
Moves from the lower limit start position (S) in the traverse direction to reach the upper limit. When the limit switch 19 detects the arrival, the movement in the traverse direction stops, and the pitch drive motor 30 operates to move the entire automatic spraying apparatus by a predetermined distance (P) in the pitch direction. After a short period of time has elapsed since the spray gun 1 reached the upper limit and moved by P1 in the pitch direction, the traverse drive motor 57 is reversed and the spray gun 1 is turned back in the opposite direction. This operation is repeated between the upper limit and the lower limit. The movement of the spray gun 1 includes movement only in the traverse direction (T1), movement only in the pitch direction (P1), and simultaneous movement (T1).
2, P2).

FIG. 18 shows an effective pattern sprayed by one spray gun. Assuming that the moving distance (P) in the pitch direction is equal to the width of the effective pattern, in the range (T1) in which the moving direction is only in the traverse direction, there is a gap between the effective pattern (A) due to the forward movement of the spray gun and the effective pattern (B) due to the backward movement. Sprayed uniformly without line. However, in the simultaneously moving range (T2, P2), the effective pattern (A) due to the forward path of the thermal spray gun and the effective pattern (B) due to the backward path overlap and the part (C) where the thermal spray coating becomes thick, and the effective pattern is formed. Instead, a portion (D) where the thermal spray coating becomes thin appears.

Therefore, when the distance between the spraying centers of the two spray guns is made equal to the width of the effective pattern and the movements of the two spray guns are overlapped, as shown in FIG. And the movement of the next thermal spray gun indicated by the broken line overlap, resulting in a vertically symmetrical movement.

The effective pattern at this time is, as shown in FIG. 20, a portion where the thermal spray coating by the preceding thermal spray gun is thick (C
1) and the part where the thermal spray coating by the next thermal spray gun is thin (D
2) overlaps, and a portion (D1) where the spray coating from the preceding spray gun is thin overlaps with a portion (C2) where the spray coating from the next spray gun is thick to form a uniform spray coating. In the figure, A1 is an effective pattern of the preceding spray gun on the outward path, B1 is an effective pattern of the preceding spray gun on the return path, A2 is an effective pattern of the next spray gun on the outward path,
B2 indicates an effective pattern due to the return path of the next spraying gun.

By supplying different thermal spray materials to the two thermal spray guns, a laminated coating can be formed. For example, when zinc is supplied to the preceding thermal spray gun and aluminum is supplied to the next thermal spray gun, a laminated film of zinc is formed on the lower layer and aluminum is formed on the upper layer. Corrosion of aluminum is suppressed. Further, the lower layer of zinc is protected by the upper layer of aluminum which is hard and not easily scratched, and oxidation of zinc can be prevented.

Further, when the thermal spray centers of the two thermal spray guns are aligned at the same position, a mixed coating can be formed. This mixed coating exhibits the same properties as a multilayer coating, and can achieve a higher anticorrosion effect. By forming a mixed coating with two spray guns, the ratio of each spray material can be freely selected.

[0062]

As is clear from the above description, according to the present invention, since the automatic spraying can be performed on the surface to be sprayed at an arbitrary angle, the quality can be improved as compared with the manual spraying. In addition, since the single pipe for the scaffold is used as a rail, the construction period of the rail can be shortened and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of an automatic spraying apparatus of the present invention with an additional member attached.

FIG. 2 is a front view of the automatic spraying apparatus.

FIG. 3 is a cross-sectional view of the automatic spraying apparatus taken along line AA.

FIG. 4 is a sectional view of the automatic thermal spraying apparatus taken along line BB.

FIG. 5 is a cross-sectional view of the automatic spraying apparatus taken along the line CC.

FIG. 6 is a perspective view of a rotation preventing device.

FIG. 7 is a perspective view of parts of the rotation preventing device.

FIG. 8 is a cross-sectional view of a rotation preventing device attached to a ring and a pin.

FIG. 9 is a cross-sectional view of a cantilever showing a connection method with a frame support member.

10A is a cross-sectional view of a rail mounting portion, and FIG. 10B is a cross-sectional view taken along line DD.

FIG. 11 is a layout view of the automatic spraying apparatus when the surface to be sprayed is a floor surface.

FIG. 12 is a layout view of the automatic spraying apparatus when the surface to be sprayed is an inclined surface.

FIG. 13 is a layout view of the automatic spraying apparatus when the surface to be sprayed is an overhanging surface.

FIG. 14 is a layout view of the automatic spraying apparatus when the surface to be sprayed is a ceiling surface.

FIG. 15 is a layout diagram of rails when a sprayed surface is a ceiling surface.

FIG. 16 is a diagram showing a setting method of a rail position when a sprayed surface is a ceiling surface.

FIG. 17 is a view for explaining the operation of one thermal spray gun;

FIG. 18 is a view showing an effective pattern sprayed by one spray gun;

FIG. 19 is a diagram illustrating the operation of two thermal spray guns.

FIG. 20 is a view showing an effective pattern sprayed by two spray guns;

FIG. 21 is a perspective view of a conventional automatic spraying apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thermal spray gun 2 Frame 3 Rail 4 First caster 6 Second caster 7 Additional member 8 Frame support member 9 Third caster 10 Caster support

Claims (12)

[Claims] 1. A frame for supporting a spraying gun in a reciprocating manner in a traverse direction, and casters disposed at both ends in the traverse direction of the frame, wherein the casters are arranged in a pitch direction orthogonal to the traverse direction. And a bracket that rotatably supports the roller about the roller axis, and the bracket is attached to the frame to position the roller directly above the rail. An automatic thermal spraying device which is supported swingably around a roller axis and an axis perpendicular to the traverse direction and can be fixed at a predetermined angle. 2. The automatic spraying apparatus according to claim 1, wherein the rail is a scaffolding single tube attached to a single tube scaffold. 3. The automatic thermal spraying apparatus according to claim 1, wherein two casters are arranged in the pitch direction on one side in the traverse direction of the frame and one caster is arranged on the other side in the traverse direction. 4. Among the casters arranged on both sides in the traverse direction of the frame, the rollers of the casters on one side are:
2. A drum-shaped roller that can roll along the first rail, and a roller of the other caster is a flat roller that can roll along the second rail and absorb rail installation errors. 4. The automatic thermal spraying device according to 2 or 3. 5. A caster provided with the hourglass roller, a bracket of which is swingable about an axis parallel to a traverse direction, and is adjustable and fixed at a predetermined angle in accordance with a curvature of the rail. 4. The automatic spraying apparatus according to 4. 6. At least one of the casters at both ends of the frame in the traverse direction is connected to the frame via a caster supporting member, and the caster supporting member is rotatable to the frame and the caster at a predetermined angle, respectively. The automatic thermal spraying device according to any one of claims 1 to 5, wherein the automatic thermal spraying device is connected so as to be able to be fixed. 7. The automatic thermal spraying device according to claim 1, wherein an additional member with a roller for vertically supporting the frame is detachably attached in a non-spraying direction on one side of the frame. 8. The automatic apparatus according to claim 7, wherein the additional member is supported on the frame so as to be swingable about a roller axis of a caster and an axis perpendicular to the traverse direction, and can be fixed at a predetermined angle. Thermal spray equipment. 9. The automatic thermal spraying device according to claim 7, wherein a truss structure is formed by connecting the additional member and a frame, and a frame supporting member for preventing the frame from overturning is provided. 10. Two spray guns arranged side by side in the pitch direction, reciprocable in the traverse direction and capable of instantaneously turning back, for spraying and spraying, and the spray gun reaches the upper or lower limit in the traverse direction. A means for moving the spray gun in the pitch direction by the same distance as the effective spraying pattern at times, so that the thick and thin portions sprayed by each spray gun are overlapped so that the sprayed film thickness is uniform. To
An automatic spraying apparatus in which the distance between the spraying center of the preceding spraying gun and the spraying center of the succeeding spraying gun in the pitch direction is the same as the width of the effective spraying pattern. 11. A thermal spraying method for forming a laminated coating by supplying different thermal spraying materials to a preceding thermal spray gun and a subsequent thermal spray gun in the pitch direction of the automatic thermal spraying apparatus according to claim 10. 12. A thermal spraying method for simultaneously spraying dissimilar metals to the same position on a surface to be sprayed from two thermal spray guns that can reciprocate in a traverse direction to form a mixed coating.