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 surface treatment device which has a nozzle head provided with a jetting nozzle which is inserted in a base end opening part and jets the jetted material, and having a tip end opening part arranged opposite to the surface to be treated; and a nozzle head support device for supporting the nozzle head. The nozzle head support device includes: a pillar arranged in a periphery of the surface to be treated; an arm mechanism which has an arm main body of which a base end is connected to the pillar and rotates around the pillar, and includes a rotation shaft parallel to the pillar and arranged on a joint of a link; and a nozzle head mounting member which is connected to a tip end of the arm mechanism and on which the nozzle head is mounted.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 spray material toward a treatment target surface set on the underside of a structure, and comprises: a surface treatment device having a nozzle head into which an injection nozzle for spraying the spray material is inserted and whose tip opening is positioned opposite the treatment target surface; and a nozzle head support device that supports the nozzle head, wherein the nozzle head support device includes a support pillar provided in the vicinity of the treatment target surface, an arm mechanism having an arm body whose base end is connected to the support pillar and rotates around the support pillar, and which has a rotation axis parallel to the support pillar at a link joint, and a nozzle head mounting member connected to the tip of the arm mechanism and on which the nozzle head is mounted.

[0009] The surface treatment system of the present invention is characterized in that the arm body is a multi-joint arm.

[0010] The surface treatment system of the present invention is characterized in that the nozzle head mounting member is provided with an operating handle.

[0011] The surface treatment system of the present invention is characterized in that it comprises a spacing member that is arranged to surround the tip opening of the nozzle head and has a plurality of protruding members whose tips abut the surface to be treated.

[0012] The surface treatment system of the present invention is characterized in that a sliding member is provided at the tip of the protruding member.

[0013] The surface treatment system of the present invention is characterized in that the surface treatment device is a blast device.

[0014] According to the surface treatment system of the present invention, an operator can operate the nozzle head support device that supports the nozzle head to move the nozzle head along the treatment target surface set on the underside of the structure and spray the spray material. In this way, the operator can perform the work without holding the surface treatment device in his / her hands. This reduces the weight burden on the operator and improves work efficiency.

[0015] In addition, by providing a spacing member, the surface to be treated set on the underside of the structure and the tip opening of the nozzle head can be kept parallel and at a constant distance, so the spray material can be sprayed evenly toward the surface to be treated. This allows work to be carried out with more stable accuracy than when an operator works by holding the nozzle head in his or her hand.

[0016] Furthermore, if an operating handle is attached to the nozzle head mounting member, the worker can operate the nozzle head support device beside the structure, eliminating the need to go under the structure to work, greatly improving the working environment. It also makes it easier to move the nozzle head to small areas such as corners of the surface to be treated where processing is likely to be left unfinished, ensuring a high-quality finished surface on the surface to be treated.

[0017] If this type of surface treatment system is used when blasting the underside of the lower flange of the steel girder in bridge repainting work, etc., and the gap between the underside of the lower flange and the suspended scaffolding is narrow, workers can carry out the work while sitting beside the steel girder. This can significantly improve work efficiency and contribute to shortening the construction period as a result of the increased work efficiency. Effect of the Invention

[0018] According to the present invention, the nozzle head of the surface treatment device can be moved along the surface to be treated while being supported by the nozzle head support device, making it possible to efficiently treat the surface 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 a blasting device of the surface treatment system of the present invention. [Diagram 3] FIG. 2 is a diagram showing a nozzle head support device of the surface treatment system of the present invention. [Figure 4] FIG. 2 is a diagram showing a nozzle head mounting member of the surface treatment system of the present invention. [Diagram 5] FIG. 2 shows a spacing member of the surface treatment system of the present invention. [Figure 6] 11A and 11B are diagrams showing another example of the arm body of the surface treatment system of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] 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 6.

[0021] <<Surface treatment system>> As shown in Figure 1, the surface treatment system 100 is installed adjacent to the lower flange 310 of a steel main girder 300 on which the treatment target surface F is set, and is composed of a blasting device 200 and a nozzle head support device 20 that supports it movably in an upward position.

[0022] <<Blast Device>> As shown in FIG. 2, the blasting device 200 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.

[0023] 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.

[0024] The nozzle head 80 is made of, for example, a cone-shaped case having a tip opening 82 facing the surface to be treated F in the direction in which the abrasive M is sprayed from the spray nozzle 71. Near the tip opening 82, a collection section 83 is provided for collecting the abrasive M sprayed from the spray nozzle 71 and dust D including foreign matter peeled off and removed from the surface to be treated F by the abrasive M.

[0025] 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 D such as foreign matter removed by the abrasive material M from leaking out.

[0026] 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 D generated inside the nozzle head 80 can be sucked and collected from the suction hose 90 connected to the collection unit 83.

[0027] <<Nozzle head support device>> The nozzle head support device 20 is a device used when moving the blast device 200 having the above-mentioned configuration along the surface F to be treated, and as shown in FIG. 1, is equipped with a support pillar 30, an arm mechanism 40, a nozzle head mounting member 50, and a spacing retaining member 60.

[0028] ≪Strut≫ The support 30 is a member to which the base end of the arm mechanism 40 described later is connected, and is made of a pillar material arranged approximately perpendicular to the surface to be treated F. As long as it can be installed near the surface to be treated F, it may be arranged in a free-standing manner or may be erected via the building 10 of the suspended scaffolding S.

[0029] 1 illustrates a case in which a pillar 30 is fixed to a site 10 of a suspended scaffolding S via a fixing device 11. The base end side of an arm mechanism 40 is rotatably connected to the pillar 30 supported by the site 10 in this manner.

[0030] <Arm> As shown in FIG. 3, the arm mechanism 40 includes an arm body 41, a pillar side connector 42 provided on the base end side of the arm body 41, and a nozzle side connector 43 provided on the tip side.

[0031] The pillar side connector 42 is a member that connects the base end side of the arm body 41 to the upper part of the pillar 30, and connects the arm body 41 so as to be rotatable around the pillar 30. This allows the arm body 41 to rotate around the pillar 30 in a direction parallel to the surface F to be processed.

[0032] The nozzle side connector 43 is a member that connects the tip side of the arm body 41 to the nozzle head mounting member 50 described later, and includes a rotating shaft 431 and a coupling 432. The rotating shaft 431 is installed at one lateral end of the coupling 432, and a connection portion with the nozzle head mounting member 50 is secured at the other end. The rotating shaft 431 is rotatably provided at the tip side of the arm body 41 so as to be parallel to the support 30 when the arm mechanism 40 is connected to the support 30. As a result, the coupling 432 of the nozzle side connector 43 rotates together with the rotating shaft 431 at the tip side of the arm body 41 in a direction parallel to the surface F to be processed.

[0033] The arm body 41 is not limited in any way as long as the rotation shaft 41c provided in the joint 41b of the link 41a can be arranged parallel to the support 30 when the arm mechanism 40 is connected to the support 30, but a multi-joint arm having a plurality of these is preferable. Also, when a heavy object is connected to the nozzle side connector 43 provided on the tip side of the arm body 41, a mechanical spring type or gas type (gas spring type) structure that can stably support the object and smoothly operate the arm body 41 is preferably built into the multi-joint arm.

[0034] An example of such an arm is the "Assist Arm (ZeroG)" by Ekso Corporation of the United States. A nozzle head mounting member 50 is connected to a nozzle side connector 43 provided on the tip side of such an arm body 41.

[0035] <Nozzle head mounting parts> As shown in FIGS. 4(a) and 4(b), the nozzle head mounting member 50 includes an arm side connector 51, a nozzle head side connector 52, and an operating handle 53.

[0036] The arm side connector 51 is a member connected to the coupling 432 provided on the nozzle side connector 43 of the arm mechanism 40 described with reference to Fig. 3, and the nozzle head side connector 52 is a member to which the nozzle head 80 of the blasting device 200 is attached. The nozzle head side connector 52 is formed in a cylindrical shape such as a hollow truncated cone shape, and the nozzle head 80 described with reference to Fig. 2 is inserted into it with the tip opening 82 facing upward.

[0037] The nozzle head mounting member 50 having such an arm side connector 51 and nozzle head side connector 52 may have any shape as long as it can hold the tip opening 82 of the nozzle head 80 in a position perpendicular to the rotation axis 431 of the nozzle side connector 43 when connected to the coupling 432 of the nozzle side connector 43 as shown in Figure 1.

[0038] As a result, the nozzle head 80 rotates together with the rotation shaft 431 of the nozzle side connector 43 via the coupling device 432 of the nozzle side connector 43 and the nozzle head mounting member 50, while maintaining a state in which the tip opening 82 is parallel to the surface to be treated F. An operation handle 53 is provided on the nozzle head side connector 52 of the nozzle head mounting member 50 having such a configuration.

[0039] 4, the operating handle 53 is made of a long rod, and its base end is connected to the outer surface of the nozzle head side connector 52 via a universal joint 54. This allows an operator to push and pull the operating handle 53, thereby moving the tip opening 82 of the nozzle head 80 along the surface F to be treated, without having to hold the nozzle head 80 in his / her hand.

[0040] <Spacing member> As shown in Figures 1 and 5, the spacing member 60 is a member that maintains a constant and parallel distance between the tip opening 82 of the nozzle head 80 mounted on the nozzle head mounting member 50 and the surface F to be treated, and comprises a truncated cone-shaped cylindrical holder 61 and four protruding members 62 arranged at equal intervals around the circumference of the cylindrical holder 61.

[0041] The protruding member 62 is a member that protrudes in the axial direction of the cylindrical holder 61, and is set so that, when the nozzle head 80 is inserted into the cylindrical holder 61, its tip is positioned approximately lower than the tip of the sealant 84 provided on the nozzle head 80. This allows the sealant 84 to be reliably abutted against the surface F to be treated when the tip of the protruding member 62 is brought into contact with the surface F to be treated.

[0042] In addition, a sliding member 621 is provided at the tip of the protruding member 62. Providing the sliding member 621 makes it possible to smoothly move the nozzle head 80 while the protruding member 62 is in contact with the surface F to be treated. In the present embodiment, a rolling element is used as the sliding member 621, but the present invention is not limited to this, and for example, a low-friction sliding plate that has been treated with a fluororesin may be used.

[0043] <<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 310 of the steel main girder 300 using the above-mentioned surface treatment system 100 is as follows.

[0044] ≪Preparation process≫ First, as shown in Fig. 1, a support 30 is installed near a surface F to be treated, using a building site 10, in a position approximately perpendicular to the surface F to be treated. The support 30 does not necessarily have to be supported by the building site 10, and may be supported anywhere as long as it can be installed in a stable state.

[0045] On the other hand, the nozzle head mounting member 50 is mounted on the nozzle head 80 of the blasting device 200, and the spacing member 60 is also mounted. After this, the arm side connector 51 of the nozzle head mounting member 50 is connected to the coupling 432 provided on the nozzle side connector 43 of the arm mechanism 40.

[0046] Next, the tip opening 82 of the nozzle head 80 is opposed to the surface F to be treated, and the tip of the protruding member 62 provided on the spacing member 60 is adjusted to a height position at which it presses against the surface F to be treated. The height position may be adjusted using the joint 41b of the arm body 41.

[0047] Alternatively, the height may be adjusted by adjusting the attachment position of the post side connector 42 relative to the post 30, or by adjusting the attachment position of the nozzle head mounting member 50 relative to the coupling 432 provided on the nozzle side connector 43. In this way, the tip of the protruding member 62 provided on the spacing member 60 is brought into contact with the surface F to be treated, the tip opening 82 of the nozzle head 80 is disposed parallel to the surface F to be treated, and the sealant 84 is brought into contact with the surface F to be treated.

[0048] <Surface treatment process> 2, the nozzle head 80 is manually moved by the operator while the abrasive material M is being sprayed from the spray nozzle 71. When the operator holds the operating handle 53 in his / her hand and pushes and pulls it, the nozzle head 80 can be moved to a position desired by the operator through a combination of the rotational movement of the arm mechanism 40 relative to the support 30, the bending and extending movement of the arm main body 41, and the rotational movement of the nozzle head mounting member 50 relative to the rotation shaft 431 of the nozzle side connector 43 provided on the arm mechanism 40, as shown in FIG.

[0049] 5, since the protruding member 62 of the spacing member 60 has the sliding member 621 at its tip, the nozzle head 80 moves smoothly along the processing target surface F. In this way, the grinding operation is performed on the processing target surface F along the trajectory of the movement of the nozzle head 80.

[0050] The range in which the grinding operation can be performed is determined by the size and shape of the arm body 41. Therefore, when there are multiple areas on the surface to be treated F where the grinding operation is to be performed using the surface treatment system 100, the surface treatment system 100 is moved to an appropriate position as appropriate, and the preparation process and surface treatment process are repeated.

[0051] In this way, the worker can perform the work without holding the nozzle head 80 in his / her hands, which reduces the weight burden and improves work efficiency. In addition, the nozzle head 80 can be freely moved by the operator, which makes it easy to move the nozzle head 80 to small parts such as corners of the surface F to be treated where processing is likely to be left unfinished, ensuring a high-quality finished surface on the surface F to be treated.

[0052] Furthermore, the spacing member 60 constantly maintains the surface to be treated F and the tip opening 82 of the nozzle head 80 parallel to each other and at a constant distance, so that the abrasive material M can be uniformly sprayed onto the surface to be treated F. This allows the work to be performed with more stable precision than when an operator holds the nozzle head 80 in his or her hand, ensuring a high-quality finished surface on the surface to be treated F.

[0053] These operations can be performed by operating the operating handle 53 beside the steel main girder 300, so the worker does not need to enter the gap between the lower flange 310 and the suspended scaffolding S to perform the operations. For example, if this gap is narrow, the worker can perform the grinding operations while sitting beside the steel main girder 300, which not only improves the working environment but also improves work efficiency, thereby contributing to shortening the construction period.

[0054] 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.

[0055] 5, in this embodiment, the spacing member 60 provided on the nozzle head 80 is composed of a cylindrical holder 61 and a protruding member 62. However, the cylindrical holder 61 may be omitted and the protruding member 62 may be fixed directly to the outer circumferential surface of the nozzle head 80. Alternatively, the spacing member 60 and the nozzle head mounting member 50 may be integrally configured.

[0056] Also, as long as the arm body 41 has a configuration that allows the nozzle head 80 to move freely within a plane perpendicular to the support 30 (within a plane parallel to the surface F to be processed), various arms can be used, such as a horizontal articulated arm as shown in Fig. 6. Accordingly, the support side connector 42 provided on the base end side of the arm body 41 and the nozzle side connector 43 provided on the tip side may also be appropriately changed in accordance with the shape of the arm body 41.

[0057] Furthermore, a mirror may be provided on the nozzle-head side connector 52 of the nozzle-head mounting member 50. In this way, a worker can check the position of the nozzle head 80 and the state of the treatment target surface F through the mirror while operating the nozzle head support device 20 beside the steel main girder 300. [Explanation of symbols]

[0058] 10 Building site 11 Fixtures 20 Nozzle head support device 30 pillars 40 Arm mechanism 41 Arm body 41a Link 41b Joint 41c Rotating shaft 42 Pillar side connector 43 Nozzle side connector 431 Rotating Axis 432 Connector 50 Nozzle head mounting member 51 Arm side connector 52 Nozzle head side connector 53 Operating handle 54 Universal joint 60 Spacing member 61 Cylindrical Holder 62 Protruding member 621 Sliding material 70 Blast Hose 71 Injection Nozzle 80 Nozzle Head 81 Proximal opening 82 Tip opening 83 Collection Department 84 Sealing material 90 Suction hose 100 Surface Treatment System 200 Surface treatment equipment (blasting equipment) 300 Steel main girder 310 Lower flange 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 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 nozzle head support device for supporting the nozzle head, The nozzle head support device includes: A support provided near the surface to be treated; an arm mechanism having an arm body having a base end connected to the support pillar and rotatable around the support pillar, the arm body having a rotation axis parallel to the support pillar at a joint of a link; a nozzle head mounting member connected to a tip of the arm mechanism and on which the nozzle head is mounted.

2. 2. The surface treatment system according to claim 1, The surface treatment system according to claim 1, wherein the arm body is a multi-joint arm.

3. 2. The surface treatment system according to claim 1, The surface treatment system according to claim 1, wherein the nozzle head mounting member is provided with an operating handle.

4. 2. The surface treatment system according to claim 1, A surface treatment system comprising a spacing member that is arranged to surround a tip opening of the nozzle head and has a plurality of protruding members whose tips abut the surface to be treated.

5. The surface treatment system according to claim 4, A surface treatment system characterized in that a sliding material is provided at the tip of the protruding member.

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

Images