Surface treatment system

Abstract

To perform efficient surface treatment on a surface to be treated which is positioned on a lower surface side of a structure.SOLUTION: A surface treatment system jets jetted material to a surface to be treated which is set on a lower surface of a structure. The system includes: a jetting nozzle which jets the jetted material; a scattering prevention housing in which the jetting nozzle is inserted; and a travelling device on which the scattering prevention housing is mounted. In the scattering prevention housing, an upper end opening part, which faces to the surface to be treated, is arranged on an upper surface, and the jetting nozzle is arranged on an inner side of a side surface and in an inclined posture to a diagonally upward direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a surface treatment system that sprays a spray material onto a surface to be treated. [Background technology]

[0002] For example, in construction work for painting the walls of structures, abrasion work is carried out to remove foreign matter from the walls. There are various methods for the abrasion work, but generally, a blasting machine is used to abrade the surface to be treated.

[0003] As disclosed in Patent Document 1, the blasting device comprises a cup-shaped case whose opening is pressed against the surface to be treated, a nozzle inside the case that sprays abrasive material toward the surface to be treated, and a nozzle head with a collection port for sucking in the sprayed abrasive material and dust generated by the collision of the abrasive material with the surface to be treated. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-172295 A Summary of the Invention [Problem to be solved by the invention]

[0005] Grinding work using a blasting device such as that described in Patent Document 1 is performed by a worker holding the nozzle head in his hand and moving it while pressing it against the surface to be treated. For example, in bridge repainting work, a worker will perform the above-mentioned grinding work on the entire surface of a steel main girder while standing on a suspended scaffold.

[0006] For this reason, when grinding the underside of the lower flange of the steel girder, if the gap between the scaffolding and the lower flange of the steel girder is narrow, the worker has to perform the grinding work in a position where he or she is lying down on the scaffolding. In such a position, not only does the work progress poorly, but it is also easy for unevenness to occur, making it difficult to ensure the quality of the finished product. In addition, there is a risk that the abrasive sprayed toward the surface to be treated will leak from the nozzle head and fall on the worker, creating problems in the working environment.

[0007] The present invention has been made in consideration of the above problems, and a main object of the present invention is to efficiently perform surface treatment on a treatment target surface located on the lower surface side of a structure. [Means for solving the problem]

[0008] In order to achieve this objective, the surface treatment system of the present invention is a surface treatment system that sprays a jet of material toward a treatment target surface set on the underside of a structure, and comprises a spray nozzle that sprays the jet of material, a splash-proof housing into which the spray nozzle is inserted, and a running device on which the splash-proof housing is mounted, and is characterized in that the splash-proof housing has an upper end opening on its upper surface that faces the treatment target surface, and the spray nozzle is arranged on the inside of the side surface in an inclined position facing diagonally upward.

[0009] The surface treatment system of the present invention is characterized in that the traveling device is provided with a lifting device for lifting and lowering the shatterproof housing, and the traveling device is provided with a moving mechanism for moving the shatterproof housing in a direction perpendicular to the lifting direction.

[0010] The surface treatment system of the present invention is characterized in that a recovery port for recovering the sprayed material is provided at the bottom of the splash-proof housing.

[0011] The surface treatment system of the present invention is characterized in that the shatterproof housing is provided with a swing mechanism for supporting the injection nozzle so that the injection nozzle can swing within a plane parallel to the upper end opening of the shatterproof housing.

[0012] The surface treatment system of the present invention is characterized in that the shatterproof housing is configured so that its shape in a plan view can be freely expanded or contracted.

[0013] The surface treatment system of the present invention is characterized in that the ejected material is an abrasive.

[0014] According to the surface treatment system of the present invention, an operator can evenly spray the spray material onto the entire surface to be treated, which is set on the underside of a structure, by facing the upper end opening of the splash prevention housing to the surface to be treated and moving it using the traveling device. This eliminates the need for the operator to hold a spray nozzle or the like in his / her hands, and allows the operator to perform the work with more stable accuracy than when the operator holds the nozzle in his / her hands as in the past, ensuring a high-quality finished surface on the surface to be treated.

[0015] In addition, the worker does not need to go under the structure, which improves the work environment and reduces the weight burden on the worker, improving work efficiency. Furthermore, if a moving mechanism is provided on the traveling device to move the shatterproof housing in a direction perpendicular to the lifting direction, the worker can move only the shatterproof housing without moving the traveling device, further improving work efficiency.

[0016] In addition, by providing a swing mechanism that swingably supports the spray nozzle within a plane parallel to the upper end opening of the scattering prevention housing, the traveling device can be moved in a direction perpendicular to the swing direction to spray the spray material toward a wide range of the treatment surface in one run. In addition, by making the scattering prevention housing expandable and contractible, the size of the space inside the scattering prevention housing into which the abrasive is sprayed can be adjusted, further improving workability.

[0017] If such a surface treatment system is used when blasting the underside of the lower flange of the steel girder during bridge repainting work, workers can work near the steel girder even when the gap between the underside of the lower flange and the suspended scaffolding is narrow. This significantly improves work efficiency and contributes to shortening the construction period. In addition, only one worker needs to be stationed near the steel girder, which also reduces the number of workers required. Effect of the Invention

[0018] According to the present invention, there is provided a shatterproof housing with the spray nozzle arranged at an inclined position facing diagonally upward on the inside of the side, and a running device on which the shatterproof housing is mounted, thereby making it possible to efficiently perform surface treatment even when the surface to be treated is located on the underside of a structure. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a diagram showing a state in which a grinding operation is carried out using the surface treatment system of the present invention. [Diagram 2] FIG. 2 is a diagram showing details of the surface treatment system of the present invention. [Diagram 3] FIG. 1 is a plan view of a surface treatment system of the present invention. [Figure 4] FIG. 11 is a diagram showing another embodiment (oscillating) of the injection nozzle of the present invention. [Diagram 5] 13A-13D show other embodiments of the shatterproof housing of the present invention (scaled and reduced). [Figure 6] 13A-13C are side views of another embodiment of the shatterproof housing of the present invention (scaled and contracted). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] The present invention is a system suitable for spraying a spray material obliquely upwards onto a treatment target surface set on the underside of a structure. Although there is no limitation on the structure on which the treatment target surface is set or the type of spray material, in this embodiment, the case of performing blast processing on a treatment target surface set on the underside of the lower flange of a steel main girder is taken as an example, and the details of the surface treatment system will be described with reference to Figs. 1 to 6.

[0021] <<Surface treatment system>> As shown in Figure 1, the surface treatment system 100 is positioned below the lower flange 210 of the steel main girder 200 on which the treatment target surface F is set, and is equipped with an injection nozzle 10, a suction hose 20, a splash prevention housing 30, a moving mechanism 40, and a running device 50.

[0022] <<Running gear>> The traveling device 50 includes a traveling means 60, a lifting device 70, and a support plate 80. The support plate 80 is made of a frame material formed in a rectangular shape in plan view with an opening in the center, and the shatterproof housing 30 is movably placed on the upper surface via a moving mechanism 40 (described later), and the lifting device 70 is connected to the lower surface.

[0023] The lifting device 70 may be any device that has an expandable mechanism capable of lifting the support plate 80. In this embodiment, a pantograph jack is used, and the traveling means 60 is attached to the underside thereof.

[0024] 2, the traveling means 60 is provided with a steering handle 63 on casters 62 equipped with wheels 61, making it easy to change direction while traveling. In addition, although details are omitted, it is advisable to provide a brake function. The traveling means 60 is not limited to the above configuration, and for example, a mecanum wheel or omni-crawler capable of moving in all directions may be used.

[0025] ≪≪Moving mechanism≫≫ 2 and 3, the movement mechanism 40 includes a pair of first rails 41 extending in the short-side direction of a rectangular support plate 80 in a plan view, and a first frame 42 that moves along the pair of first rails. The first frame 42 includes a frame plate 421 and a caster 423 with wheels 422, as shown in FIG.

[0026] The movement mechanism 40 also includes a pair of second rails 43 and a second frame 44 that moves along the second rails 43. The pair of second rails 43 are formed on a frame plate 421 of the first frame 42 and extend in a direction perpendicular to the first rails 41. The second frame 44 has a frame plate 441 and casters 443 equipped with wheels 442 attached to the underside thereof.

[0027] A pair of fixing metal fittings 444 for the shatterproof housing 30 are provided on the upper surface of the frame plate 441. The shatterproof housing 30 is installed on the frame plate 441 of the second frame 44 via the fixing metal fittings 444. The frame plate 421 of the first frame 42 and the frame plate 441 of the second frame 44 each have an opening in the center.

[0028] With the running device 50 and the moving mechanism 40 configured as described above, the height position of the shatterproof housing 30 relative to the running means 60 can be adjusted by operating the lifting device 70. Also, the shatterproof housing 30 can be moved by running the running device 50 on the suspended scaffolding S. Furthermore, the shatterproof housing 30 can also be moved in a direction perpendicular to the lifting direction within the surface of the support board 80 via the moving mechanism 40 without running the running device 50.

[0029] <<Splash-proof housing, spray nozzle and suction hose>> As shown in Figs. 2 and 3, the shatterproof housing 30 is formed in a shape in which a rectangular parallelepiped upper case body 31 and a truncated pyramidal lower case body 32 are combined together.

[0030] The upper box 31 is formed in a cylindrical shape with top and bottom openings, and a blast hose 11 with a jet nozzle 10 attached to its tip is connected to the side, and a seal member 311 is attached to the periphery of the upper opening 31a. The seal member 311 is, for example, a brush, and prevents the abrasive M jetted from the jet nozzle 10 and dust D such as foreign matter removed by the abrasive M from leaking out.

[0031] The blast hose 11, which has the injection nozzle 10 attached to its tip, is provided so as to penetrate the side surface of the upper box body 31, and is arranged so that the injection nozzle 10 is inclined inside the side surface facing diagonally upward. This causes the injected abrasive material M to be injected at an angle toward the treatment target surface F facing the upper end opening 31a. The blast hose 11 supplies the abrasive material M transported together with compressed air to the injection nozzle 10 attached to its tip, and its base end is connected to a pressurized tank (not shown) in which the abrasive material M is stored.

[0032] 2 and 3, the upper end of the lower box 32 is connected to the upper box 31, and the inside functions as a collection space 321 that collects dust D. The dust D includes the abrasive M sprayed from the spray nozzle 10 and foreign matter peeled off and removed from the treatment target surface F by the abrasive M. The lower box 32 may have any shape as long as the collection space 321 formed therein can be formed into a funnel shape.

[0033] The tip of a suction hose 20 is connected to the bottom of the lower housing 32 so as to communicate with this recovery space 321. The suction hose 20 collects dust D accumulated in the recovery space 321, and has a base end connected to a dust collector (not shown). Thus, by operating the dust collector, the dust D accumulated in the recovery space 321 can be sucked and collected by the suction hose 20.

[0034] <<Surface treatment method using a surface treatment system>> A method of performing blast processing on the treatment target surface F provided on the lower flange 210 of the steel main girder 200 using the surface treatment system 100 having the above-mentioned configuration is, for example, as follows.

[0035] 1, the surface treatment system 100 is moved on the suspended scaffold S so that the upper end opening 31a of the shatterproof housing 30 faces the surface F to be treated. Next, the lifting device 70 is operated to adjust the height position of the shatterproof housing 30 so that the seal member 311 abuts against the surface F to be treated. Furthermore, if necessary, the movement mechanism 40 is used to align the upper end opening 31a of the shatterproof housing 30 with the surface F to be treated.

[0036] For alignment, for example, an operator manually pushes and pulls the shatterproof housing 30. This causes the first frame 42 and the second frame 44 of the moving mechanism 40 to move along the first rail 41 and the second rail 43 perpendicular to the first rail 41, as described with reference to Fig. 2. Therefore, the shatterproof housing 30 can be moved on the support plate 80 of the traveling device 50 without moving the traveling device 50.

[0037] 1, the abrasive M supplied through the blast hose 11 is sprayed from the spray nozzle 10. The abrasive M is sprayed obliquely upward and collides with the surface F to be treated. Then, the abrasive M falls into the recovery space 321 as dust D together with foreign matter peeled off and removed from the surface F to be treated, and is sucked and collected by the suction hose 20.

[0038] When the surface F to be treated is narrow, the worker performs these operations while appropriately moving the shatterproof housing 30 on the support plate 80 of the traveling device 50 using the moving mechanism 40, similar to the above-mentioned alignment procedure. On the other hand, when the surface F to be treated is wide, the operations are performed while the surface treatment system 100 travels on the suspended scaffold S using the traveling device 50. In this way, the abrasive M can be sprayed uniformly over the entire surface F to be treated set on the lower surface of the lower flange 210, thereby performing blast processing.

[0039] These grinding operations can be performed by operating the surface treatment system 100 beside the steel main girder 200, so the worker does not need to enter the gap between the lower flange 210 and the suspended scaffolding S to perform the work. For example, if this gap is narrow, the worker can perform the grinding work in a seated position beside the steel main girder 200, improving the working environment. In addition, the work efficiency is improved, which contributes to shortening the construction period.

[0040] Also, it is possible to reduce manpower since only one worker is required to be stationed beside the steel main girder 200 at all times. Furthermore, compared to the conventional technology in which a worker works by holding a nozzle head equipped with the jet nozzle 10 in his / her hand, grinding work can be performed with stable accuracy, so that a high-quality finished surface can be ensured on the surface F to be treated.

[0041] The surface treatment system 100 of the present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention.

[0042] <<Injection nozzle swing mechanism>> 1 to 3, the position of the spray nozzle 10 located on the inside of the side surface of the shatterproof housing 30 is fixed. However, this is not limited to this, and the spray nozzle 10 may be provided so as to be freely swingable within a plane parallel to the upper end opening 31a of the shatterproof housing 30.

[0043] Any mechanism may be used to swing the injection nozzle 10, but an example of such a mechanism is a swing mechanism 90 as shown in Fig. 4. The swing mechanism 90 includes, for example, a hose attachment 91, a rotating shaft 92, a bearing 93, and a swing handle 94.

[0044] The hose attachment 91 is a cylindrical member installed to enclose the blast hose 11, and has a rotating shaft 92 attached to its outer circumferential surface, which protrudes radially. The rotating shaft 92 extends in the lifting direction of the lifting device 70 (i.e., in a direction perpendicular to the upper end opening 31a of the splash-prevention housing 30).

[0045] A bearing 93 supporting the rotating shaft 92 is provided on the outer surface of the splash prevention housing 30, near the through hole through which the blast hose 11 passes. The swing handle 94 is a hose attachment 91, and is rotatably installed around a shaft 941 attached in parallel to the rotating shaft 92.

[0046] This allows the operator to push and pull the swing handle 94 beside the lower flange 210 to swing the spray nozzle 10 in a plane parallel to the upper end opening 31a of the shatterproof housing 30. Therefore, for example, by spraying the abrasive M from the spray nozzle 10 while moving the traveling device 50 in a direction perpendicular to the swinging direction of the spray nozzle 10, the abrasive M can be sprayed toward a wide range of the treatment target surface F in one run.

[0047] <<Expansion / contraction mechanism for shatterproof housing>> Furthermore, the shatterproof housing 30 may be configured to be expandable and contractable in one direction in plan view, as shown in Figs.

[0048] Specifically, as shown in the plan view of Fig. 5, for example, the upper box body 31 is composed of a fixed member 33, a pair of slide members 34, and a connector 35 that connects them together. The fixed member 33 is composed of a pair of side walls 331 and a bottom 332 that connects the lower ends of the side walls 331. The bottom 332 is connected to the lower box body 32, which is formed into a truncated pyramid shape, with a hole provided in the approximate center. In addition, a seal member 311 is connected to the upper inside portion of the pair of side walls 331.

[0049] The pair of slide members 34 are disposed on either side of the fixed member 33, and are composed of side walls 341 that are U-shaped in plan view and a bottom plate 342 that closes the lower ends of the side walls 341. The size of the slide members 34 is such that the inner surface of the side walls 341 fits along the outer surface of the side walls 331 of the fixed member 33, and the upper surface of the bottom plate 342 can slide along the lower surface of the bottom 332 of the fixed member 33. A seal member 311 is connected to the upper portion of the outer surface of the U-shaped side walls 341.

[0050] 6(a), the connector 35 is composed of a plurality of bolts 351 and a connecting hardware 352. The plurality of bolts 351 are provided at the same height on the outer surface of the side wall 331 of the fixed member 33 and on the outer surface of the side wall 341 of the sliding member 34. The connecting hardware 352 is provided with a plurality of insertion holes at intervals, through which the bolts 351 can be inserted.

[0051] The shatterproof housing 30 having the above configuration can be assembled by placing a pair of slide members 34 on either side of the fixed member 33, inserting a plurality of bolts 351 attached to the outer surfaces of the slide members 34 into insertion holes of the connecting hardware 352, and tightening nuts. During this assembly, as shown in Figures 6(a) and (b), by sliding the pair of slide members 34 relative to the fixed member 33, it is possible to expand or contract the shape in plan view in one direction.

[0052] In this way, for example, the size of the space in the shatterproof housing 30 into which the abrasive M is sprayed can be adjusted according to the width of the lower flange 210 on which the surface to be treated F is set. These may be used in conjunction with the swing mechanism 90 of the spray nozzle 10 described above. When used in conjunction, it is advisable to match the swing direction of the spray nozzle 10 with the direction in which the shatterproof housing 30 expands and contracts in a plan view.

[0053] In this embodiment, the shatterproof housing 30 is expanded and contracted in one direction in plan view, but it may also be configured to be expandable and contractable in a direction perpendicular to the one direction. [Explanation of symbols]

[0054] 100 Surface Treatment System 10. Injection nozzle 11 Blast Hose 20 Suction hose 30 Shatterproof housing 31 Upper box 31a Top opening 311 Sealing material 32 Lower box 321 Recovery Space 33 Fixing member 331 Side wall 332 Bottom 34 Slide member 341 Side wall 342 Bottom plate 35 Connectors 351 Volts 352 Connecting hardware 40 Moving mechanism 41 First Rail 42 First Mount 421 Frame plate 422 wheels 423 Caster 43 Second Rail 44 Second Mount 441 Frame plate 442 wheels 443 Caster 50 Running gear 60 Means of transportation 70 Lifting device 80 Support board 90 Swing Mechanism 91 Hose fitting 92 Rotational Axis 93 Bearings 94 Swing Handle 200 Steel main girder 210 Lower flange 220 Web M Abrasive (jet) D Dust F Processing surface S Suspended scaffolding

Claims

1. A surface treatment system that sprays a spray material toward a treatment target surface set on a lower surface of a structure, A spray nozzle for spraying the spray object; a splash-proof housing into which the injection nozzle is inserted; a running device on which the shatterproof housing is mounted; The shatterproof housing comprises: An upper end opening facing the processing target surface is provided on the upper surface, A surface treatment system, characterized in that the injection nozzle is disposed on the inside of a side surface in an inclined position facing diagonally upward.

2. 2. The surface treatment system according to claim 1, a lifting device for lifting the shatterproof housing is provided on the traveling device; A surface treatment system comprising: a moving mechanism disposed on the traveling device for moving the shatterproof housing in a direction perpendicular to a lifting direction.

3. 2. The surface treatment system according to claim 1, A surface treatment system characterized in that a recovery port for recovering the sprayed material is provided at the bottom of the splash-proof housing.

4. 2. The surface treatment system according to claim 1, a surface treatment system including a swing mechanism provided in the splash-proof housing for swingably supporting the injection nozzle within a plane parallel to the upper end opening of the splash-proof housing;

5. 2. The surface treatment system according to claim 1, A surface treatment system, characterized in that the shatterproof housing is configured so that its planar shape can be freely expanded or contracted.

6. 2. The surface treatment system according to claim 1, A surface treatment system characterized in that the ejected material is an abrasive material.

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