Surface treatment system

Abstract

To perform surface treatment of a treatment object surface, which is positioned on a lower surface side of a structure, with good efficiency.SOLUTION: A surface treatment system, which injects an injection material toward a treatment object surface positioned on a lower surface of a structure, comprises: a surface treatment device comprising a nozzle head in which an injection nozzle for injecting the injection material is inserted into a base end opening part, and a tip opening part is so located as to face the treatment object surface; and a mobile device which moves the nozzle head along the treatment object surface. The mobile device includes: a guide member which is located along the treatment object surface; a trolley which travels along the guide member while hanging the nozzle head; and a feeding stand which moves the guide member along the treatment object surface and in a direction orthogonal to an extension direction of the guide member.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 surface to be treated set on the underside of a structure, and is equipped with a surface treatment device having a nozzle head into which an injection nozzle for spraying the jet of material is inserted and whose tip opening is positioned opposite the surface to be treated, and a moving device that moves the nozzle head along the surface to be treated, the moving device including a guide member that is positioned along the surface to be treated, a trolley that runs along the guide member while suspending the nozzle head, and a slide table that moves the guide member along the surface to be treated in a direction perpendicular to the extension direction of the guide member.

[0009] The surface treatment system of the present invention is characterized in that the surface to be treated is set on the underside of the lower flange of a steel main girder, the guide member is arranged to extend in the width direction of the steel main girder, and the slide table is arranged on the upper surface of the lower flange.

[0010] The surface treatment system of the present invention is characterized in that the slide table is arranged on one side of the web of the steel main girder, and supports one end of the guide member with the slide table, and a clamping member that clamps the lower flange is arranged on the other side of the web, and supports the other end of the guide member with the clamping member.

[0011] The surface treatment system of the present invention is characterized in that the surface treatment device is a blast device.

[0012] According to the surface treatment system of the present invention, an operator can uniformly spray the spray material over the entire surface to be treated, which is set on the underside of a structure, by repeatedly moving the nozzle head along the guide member via the trolley and moving the slide table to move the guide member in a direction perpendicular to the extension direction of the guide member.

[0013] This allows workers to perform work with more consistent precision than when they hold the nozzle head in their hands, ensuring a high-quality finished surface on the surface to be treated. In addition, workers can operate the moving device next to the structure, eliminating the need to go under the structure to work, greatly improving the working environment.

[0014] If such a surface treatment system is used for blasting the underside of the lower flange of the steel girder in bridge repainting work, workers can work in a seated position beside 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, it is sufficient for one worker to be stationed on one side of the web of the steel girder, which also reduces the number of workers required. Effect of the Invention

[0015] According to the present invention, since a moving device is provided that moves the nozzle head of the surface treatment device along the surface to be treated, efficient surface treatment is possible even when the surface to be treated is located on the underside of a structure. [Brief description of the drawings]

[0016] [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. 1 is a front view of a surface treatment system according to the present invention. [Diagram 3] FIG. 2 is a side view of the slide side of the surface treatment system of the present invention. [Figure 4] FIG. 2 is a side view showing a clamping member side of the surface treatment system of the present invention. [Diagram 5] FIG. 2 is a diagram showing a surface treatment device supported by a moving device of the surface treatment system of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The present invention is a system suitable for spraying an injection material upward against a treatment target surface set on the underside of a structure. Although there are no limitations on the structure on which the treatment target surface is set, the injection material, the type of surface treatment device, etc., 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 5.

[0018] <<Surface treatment system>> As shown in Figures 1 to 4, the surface treatment system 100 is installed on the lower flange 210 of a steel main girder 200 on which the treatment target surface F is set, and is composed of a blasting device 60 as shown in Figure 5 and a moving device 10 that supports the blasting device 60 in a suspended state so that it can be moved.

[0019] <<Blast Device>> As shown in Figure 5, the blasting device 60 is a device that sprays abrasive material M toward a surface F to be treated, thereby causing the abrasive material M to collide with foreign matter on the surface F to be treated and remove it, and is equipped with a blast hose 70, a nozzle head 80, and a suction hose 90.

[0020] The blast hose 70 supplies the abrasive M to be transported together with compressed air to an injection nozzle 71 attached to the tip, and the tip of the injection nozzle 71 is inserted into a base end opening 81 of a nozzle head 80. The base end of the blast hose 70 is connected to a pressurized tank (not shown) in which the abrasive M is stored.

[0021] The nozzle head 80 is, for example, a cone-shaped case with a tip opening 82 facing the surface to be treated F in the direction in which the abrasive material M is sprayed from the spray nozzle 71, and a collection section 83 is provided near the tip opening 82 for collecting the abrasive material M sprayed from the spray nozzle 71 and dust S including foreign matter peeled off and removed from the surface to be treated F by the abrasive material M.

[0022] Further, a sealing material 84 is provided at the tip opening 82 facing the surface to be treated F to close the gap with the surface to be treated F. The sealing material 84 is, for example, a brush, and prevents the abrasive material M sprayed from the spray nozzle 71 and dust S such as foreign matter removed by the abrasive material M from leaking out.

[0023] One end of the suction hose 90 is connected to the collection unit 83, and the other end is connected to a dust collector (not shown). By operating this dust collector, the above-mentioned dust S generated inside the nozzle head 80 can be sucked and collected from the suction hose 90 connected to the collection unit 83.

[0024] <<Movement Device>> The moving device 10 is a device used to move the blasting device 60 having the above-mentioned configuration along the surface F to be treated, and as shown in Figure 2, it is equipped with a guide member 20, a slide table 30, a clamping member 40, and a trolley 50.

[0025] <Guide parts> The guide member 20 is disposed so as to extend in the width direction of the lower flange 210, spaced apart from the surface F to be treated. As shown in Fig. 1, the guide member 20 has a shape in which an open groove 21 extending in the axial direction is provided on the side of a cylindrical elongated member, and the guide member 20 is disposed so that the open groove 21 faces downward. The guide member 20 may be made of a steel material such as a C-channel.

[0026] A pair of guide members 20 having such a shape are arranged in parallel with a gap therebetween, as shown in Fig. 3. The gap between them is slightly larger than the outer diameter of the tip opening 82 of the nozzle head 80 provided in the blasting device 60. As shown in Fig. 2, one end of each of these two guide members 20 is supported via a feed table 30 on one side of the lower flange 210 sandwiching the web 220. The other end is supported via a clamping member 40 on the other side of the lower flange 210 sandwiching the web 220.

[0027] <Slide table> 2, the slide table 30 includes a connecting fitting 31 and a caster 33 equipped with wheels 32. The connecting fitting 31 has a cross section formed in a substantially Z-shape, with a lower flat plate 312 connected to the guide member 20 and an upper flat plate 311 connected to the caster 33 equipped with wheels 32.

[0028] 3, the connecting fitting 31 having such a cross-sectional shape extends in the axial direction of the steel main girder 200 and has a length capable of connecting the ends of a pair of guide members 20. The wheels 32 are arranged on the upper surface of the lower flange 210 in a direction that allows them to run in the axial direction of the steel main girder 200. This allows the pair of guide members 20 to simultaneously move in the axial direction of the steel main girder 200 while maintaining the separation distance therebetween.

[0029] 3 shows an example in which two casters 33 each having wheels 32 are provided on the feed base 30, but any number of casters may be used as long as the pair of guide members 20 can be moved stably. The structure of the feed base 30 is not limited in any way as long as the pair of guide members 20 can be moved in the axial direction of the steel main girder 200 while maintaining the separation between them.

[0030] ≪Holding member≫ The clamping member 40 is a device that fixes the pair of guide members 20 to the lower flange 210 of the steel main girder 200, and includes a clamp 41 and a connecting plate 42 as shown in FIG.

[0031] Clamp 41 has a so-called C-clamp structure, and with door stop rubber 411 abutting the underside of lower flange 210 inserted into arm portion 413, bolt 412 is tightened and its tip abuts on the upper surface of lower flange 210 to clamp lower flange 210. In addition, arm portion 413 of clamp 41 has connecting plate 42 integrally provided at its lower end, and connected to guide member 20.

[0032] As shown in Fig. 4, these connecting plates 42 and the arm portion 413 of the clamp 41 have a length sufficient to connect the ends of a pair of guide members 20 together in the axial direction of the steel main girder 200. Note that Fig. 4 shows an example in which two combinations of door stop rubber 411 and bolt 412 are provided in the longitudinal direction of the arm portion 413, but any number is acceptable as long as the pair of guide members 20 can be stably fixed.

[0033] The clamping member 40 may be any means capable of removably fixing the pair of guide members 20 to the lower flange 210 of the steel main girder 200. A trolley 50 is provided on the pair of guide members 20 supported on the lower flange 210 of the steel main girder 200 via the clamping member 40 and the slide table 30.

[0034] <Trolley> As shown in FIGS. 2 and 4, the trolley 50 is a moving body that moves along a pair of guide members 20 while supporting the nozzle head 80 of the blasting device 60 in an upward position, and includes a hoist 51 and a base body 52.

[0035] As shown in the enlarged portion of Fig. 4, a total of four hoist wheels 51 are provided, two for each guide member 20, with their lower ends hanging down from the open groove 21 of the guide member 20. A frame body 52 is provided at the lower ends of these hoist wheels 51. The frame body 52 is made up of a metal fitting having a U-shape in plan view, which is made up of two faces parallel to the guide members 20 and one face perpendicular to the two faces.

[0036] 2 and 4, each of the two faces parallel to the guide member 20 is provided with a connection portion 521 at its upper portion for connecting to the hoist 51. Moreover, a gripping metal fitting 522 for gripping the nozzle head 80 of the blasting device 60 is provided on the inside of one face perpendicular to these two faces, as shown in Fig. 5. The gripping metal fitting 522 may have any shape, and in Fig. 5, a clamp metal fitting is used.

[0037] In this manner, the nozzle head 80 of the blasting device 60 is held by the holding fitting 522 in an upward position with the tip opening 82 facing the surface F to be treated, and is thus suspended from the trolley 50. The nozzle head 80 is arranged so that the dust S collection section 83 to which the suction hose 90 is attached faces the opening of the stand main body 52, which is U-shaped in plan view (so that it extends in the width direction of the lower flange 210).

[0038] <<Surface treatment method using a surface treatment system>> The procedure for blasting the treatment target surface F set on the lower surface of the lower flange 210 of the steel main girder 200 using the above-mentioned surface treatment system 100 is as follows.

[0039] First, as shown in Fig. 2, a pair of guide members 20 are arranged with a gap between them on the lower surface side of the lower flange 210 of the steel main girder 200 via the feed table 30 and the clamping member 40. Simultaneously or before or after this, as shown in Fig. 5, the nozzle head 80 of the blasting device 60 is suspended from the trolley 50 arranged on the guide members 20 with the tip opening 82 facing the surface F to be treated.

[0040] Next, the pair of guide members 20 are fixed to the lower flange 210 by the clamping member 40, and the sealing material 84 of the nozzle head 80 is brought into contact with the surface F to be treated. Thereafter, as shown in Fig. 1, the operator manually moves the trolley 50 along the guide members 20 from one end side to the other end side (width direction) of the lower flange 210 while spraying the abrasive material M from the spray nozzle 71. As a result, the surface F to be treated is linearly ground in the width direction of the lower flange 210 along the trajectory of the movement of the nozzle head 80.

[0041] When the trolley 50 (or nozzle head 80) reaches the other end, the injection of the abrasive material M is interrupted, and the clamping member 40 is released to release the pair of guide members 20 and the lower flange 210. Next, the pair of guide members 20 are moved a predetermined amount in the axial direction of the steel main girder 200 via the slide table 30. The amount of movement is preferably the same length as the aperture of the injection nozzle 71, for example.

[0042] After moving the pair of guide members 20, the pair of guide members 20 are fixed to the lower flange 210 by the clamping member 40, and the trolley 50 is moved from the other end side of the lower flange 210 to one end side (width direction) following the above procedure while spraying the abrasive material M, thereby performing the grinding operation.

[0043] In this manner, the operation of moving the nozzle head 80 in the width direction of the lower flange 210 along the guide member 20 via the trolley 50 and the operation of moving the guide member 20 in the axial direction of the steel main girder 200 (a direction perpendicular to the extending direction of the guide member 20) via the feed table 30 are repeated. This allows the abrasive material M to be sprayed uniformly over the entire treatment target surface F set on the underside of the lower flange 210, thereby performing blast processing.

[0044] These operations can be performed by operating the moving device 10 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 to perform the operations. For example, if the gap is narrow, the worker can perform the grinding operations 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.

[0045] Also, it is sufficient for one worker to be stationed on the other side of the web 220 of the steel main girder 200 (the side where the clamping member 40 is installed), which makes it possible to reduce the number of workers. Furthermore, compared to when a worker works by holding the nozzle head 80 in his / her hand, the grinding work can be performed with stable accuracy, so that a high-quality finished surface can be ensured on the processing target surface F.

[0046] 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.

[0047] For example, a measuring device capable of measuring the amount of movement may be provided on the feed table 30 that moves in the axial direction of the steel main girder 200. In this way, the amount of movement of the feed table 30 can be set to the same length as the aperture of the injection nozzle 71, making it possible to ensure a uniform and highly accurate finish on the treatment target surface F.

[0048] In the present embodiment, the trolley 50 moving along the guide member 20 is manually operated by an operator. However, this is not limited to this, and for example, a traction device using a wire or the like may be attached, or a motor or the like may be mounted to make the trolley 50 self-propelled.

[0049] Furthermore, the gripping metal fitting 522 of the nozzle head 80 as shown in FIG. 5 may be configured so that its height position can be adjusted relative to the base body 52 of the trolley 50 so that the sealing material 84 of the nozzle head 80 reliably contacts the surface F to be treated.

[0050] In addition, in this embodiment, the slide 30 is provided only on one side of the web 220 of the steel main girder 200, but a slide 30 may also be provided on the other side. [Explanation of symbols]

[0051] 100 Surface Treatment System 10. Mobile Devices 20 Guide member 21 Opening groove 30 Slide 31 Connecting fittings 32 wheels 33 Caster 40 Clamping member 41 Clamp 411 Doorstop rubber 412 Volts 413 Arm part 42 Connecting plate 50 Trolley 51 Hoist 52 Stand body 521 Connection 522 Grip fittings 60 Blasting equipment (surface treatment equipment) 70 Blast Hose 71 Injection Nozzle 80 Nozzle Head 81 Proximal opening 82 Tip opening 83 Collection Department 84 Sealing material 90 Suction hose 200 Steel main girder 210 Lower flange 220 Web M Abrasive (jet) S dust F Processing surface

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 surface treatment device including a nozzle head having a base end opening into which an injection nozzle for injecting the injection material is inserted and a tip end opening of which is disposed opposite the treatment target surface; a moving device that moves the nozzle head along the processing target surface, The moving device is A guide member disposed along the processing target surface; a trolley that travels along the guide member while suspending the nozzle head; a slide table that moves the guide member along the surface to be treated in a direction perpendicular to an extension direction of the guide member.

2. 2. The surface treatment system according to claim 1, The processing target surface is set to the lower surface of the lower flange of the steel main girder, The guide member is arranged to extend in the width direction of the steel main girder, The surface treatment system, characterized in that the slide is disposed on an upper surface of the lower flange.

3. 3. The surface treatment system according to claim 2, The slide is disposed on one side of the web of the steel main girder, and supports one end of the guide member with the slide. A surface treatment system characterized in that a clamping member for clamping the lower flange is disposed on the other side of the web, and the other end side of the guide member is supported by the clamping member.

4. 2. The surface treatment system according to claim 1, The surface treatment system, wherein the surface treatment device is a blast device.

Images