Maintenance method and maintenance device

Abstract

To provide a maintenance method and a maintenance device that can make it possible to effectively prevent deterioration of a structure.SOLUTION: A maintenance device according to the present invention comprises a camera 13 that photographs a coated film C to detect a deteriorated state of the coated film C, a spray nozzle 12 that imparts a material of the coated film C to the coated film C for repairing the deteriorated state of the coated film C on the basis of a detection result of the camera 13, and a first drone 14 capable of loading the camera 13 and the spray nozzle 12 and flying. By photographing the coated film C while making the first drone 14 fly and detecting the deteriorated state of the coated film C, the deteriorated state of the coated film C is repaired on the basis of the detection result of the detection step.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a maintenance method and a maintenance device that are applied to the maintenance of protective films for protecting structures such as bridges and roads. [Background technology]

[0002] BACKGROUND ART Conventionally, in order to protect structures such as bridges and roads, a protective film is applied to the surface of the structure.

[0003] For example, Patent Document 1 discloses a method of painting steel bridges in which, in the repainting and repair of steel bridges, a more weather-resistant paint is applied to both ends of the steel bridge where the degree of deterioration is more severe than other parts, thereby averaging out the deterioration balance of the entire steel bridge, extending the repainting repair cycle, and reducing maintenance costs.

[0004] Furthermore, Patent Document 2 discloses a defect detection method for detecting cracks or defects such as chipped or peeled coatings in a structure having a coating film on its surface. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-144285 [Patent Document 2] Japanese Patent Application Publication No. 2019-45398 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the former painting method involves repainting after the paint film has peeled off, and therefore cannot effectively prevent deterioration of the steel bridge.

[0007] The latter method is a method for detecting defects in a structure under paint without removing the paint, and since the defect is detected after it has occurred in the structure, it cannot effectively prevent deterioration of the structure.

[0008] The present invention has been made in light of the above circumstances, and its object is to provide a maintenance method and maintenance device that, rather than targeting the structure itself as in the past, detects the deterioration state of a protective film that protects the structure, and repairs the deterioration state of that protective film, thereby effectively preventing deterioration of the structure. [Means for solving the problem]

[0009] In order to solve the above problems, the maintenance method of the present invention is a maintenance method for a protective film formed on the surface of a structure to protect the structure, and is characterized by comprising a detection step of photographing the protective film to detect the deterioration state of the protective film, and a repair step of repairing the deterioration state of the protective film based on the detection results of this detection step.

[0010] In addition, the maintenance device of the present invention is a maintenance device that maintains a protective film formed on the surface of a structure to protect the structure, and is characterized by comprising: a detection means that photographs the protective film and detects the deterioration state of the protective film; a raw material application means that applies protective film raw material to the protective film to repair the deterioration state of the protective film based on the detection result of the detection means; and a first flight means that is capable of flying while carrying the detection means and the raw material application means. [Effects of the Invention]

[0011] According to the maintenance method and maintenance device of the present invention, rather than targeting the structure itself as in the past, deterioration of the structure can be effectively prevented by detecting the deterioration state of the protective film that protects the structure and repairing the deterioration state of the protective film. [Brief explanation of the drawings]

[0012] The drawings illustrate particular embodiments of the present invention, including essential features of the invention as well as alternative and preferred embodiments. [Figure 1] 1 is a perspective view showing a maintenance device according to a first embodiment of the present invention. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. 6 is a front view showing a maintenance device according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] First Embodiment A first embodiment of the present invention will be described below with reference to the drawings.

[0014] In FIG. 1, reference numeral 1 denotes a bridge (structure) such as a girder bridge made of reinforced concrete.

[0015] The bridge 1 comprises a plurality of piers 2 arranged at intervals and deck slabs 3 supported by the piers 2.

[0016] The floorboard 3 is formed to be long and has an upper surface 4 and a lower surface 5 .

[0017] On the upper surface 4 of this floor board 3, a roadway portion 6 is formed in the center in the width direction along the longitudinal direction.

[0018] In addition, a sidewalk section 7 is provided on each side of the roadway section 6.

[0019] Furthermore, a protective fence 8 is provided on the outside of each sidewalk section 7.

[0020] A coating film (protective film) C for protecting the bridge 1 is formed on the underside of the bridge 1 configured in this manner.

[0021] This coating film C is moisture permeable, stretchable, water impermeable, stain resistant, visible (colored), adhesive, and is, for example, Aizole EX (trade name, manufactured by Aizole Technica Co., Ltd.).

[0022] This coating film C has moisture permeability, so that it can release moisture inside the concrete of the bridge 1 to the outside, and can maintain adhesion or integrity without causing peeling of the coating film C.

[0023] Furthermore, because the coating film C has elasticity, it can follow the expansion and contraction of the concrete of the bridge 1 due to temperature, and can maintain adhesion or integrity without peeling off.

[0024] Furthermore, since the coating film C is impermeable, the amount of water that can penetrate is zero, and if the coating film C is not deteriorated and is in a sound state, it will not cause deterioration of the concrete and reinforcing bars inside the bridge 1.

[0025] Furthermore, this coating film C has antifouling properties and visibility (colored), so that it is difficult for dirt to adhere to it, and image analysis can be performed more easily.

[0026] Furthermore, this coating film C has adhesive properties, so that it can maintain its adhesive strength if there is no abnormality in the coating film C. For example, in the case of Aizole EX (trade name), it has an adhesive strength of 1.8 N / mm 2 is.

[0027] Meanwhile, in FIG. 1, reference numeral 11 denotes a maintenance device according to the present invention for performing maintenance on the coating film C of the bridge 1 on which the coating film C is formed in this manner.

[0028] This maintenance device 11 is equipped with a spray nozzle (raw material application means) 12 that sprays and applies (applies) the raw material of the coating film C to the coating film C, a camera (detection means) 13 that photographs the coating film C and detects the deterioration state of the coating film C, and a first drone (first flying means) 14 that is capable of flying while carrying the spray nozzle 12 and the camera 13.

[0029] Furthermore, the maintenance device 11 is provided with a carriage (moving means) 15 that can move on the upper surface 4 of the bridge 1, and can be moved along the length of the bridge 1 when performing maintenance on the bridge 1.

[0030] The carriage 15 is equipped with a supply means 16 for selectively supplying the raw material of the protective film C and water to the injection nozzle 12.

[0031] The supply means 16 includes a raw material storage tank 17 for storing raw materials, a water storage tank 18 for storing water, and a pump 19 for selectively pumping these.

[0032] In addition, the pump 19 and the spray nozzle 12 are connected by a flexible hose 20, and the raw material or water selectively pumped from the pump 19 mounted on the cart 15 is guided via the hose 20 to the spray nozzle 12 mounted on the first drone 14.

[0033] The hose 20 is supported by a support means 21 so as to be movably guided, and the load of the hose 20 is thereby borne by the support means 21.

[0034] That is, the support means 21 comprises a flexible rope (cord-like member) 22 arranged along the planned flight path of the first drone 14, and a plurality of rings (hanging members) 23 made of, for example, SUS that are movably attached to the rope 22 and hang the hose 20.

[0035] The rings 23 are connected to the hose 20 at predetermined intervals, thereby guiding the hose 20 along the rope 22.

[0036] The base end of this rope 22 is connected to a support means 21 fixed to the carriage 15 .

[0037] This support means 21 has a vertical section 24 erected on the trolley 15 and a horizontal section 25 that extends from the top of this vertical section 24 beyond the protective fence 8 and out from the pier 2, and the base end of the rope 22 is connected to the tip of this horizontal section 25.

[0038] The hose 20 is configured to be supported by the ring 23 so as to be movable on the vertical portion 24 and the horizontal portion 25 as well.

[0039] That is, the hose 20 is guided upward from the pump 19 along the vertical section 24, then guided horizontally along the horizontal section 25, then guided downward by the rope 22, and then guided below the bridge 1.

[0040] The rope 22 is tensioned by a second drone (second flying means) 26.

[0041] That is, the tip of the rope 22 is connected to the second drone (second flying means) 26 using an insulating pin or the like, and the second drone 26 flies from one side (the bogie 15 side) of the bridge 1 along the underside and lands on top of the protective fence 8 on the other side, thereby being stretched along the underside of the bridge 1.

[0042] The second drone 26 is equipped with an electromagnet 27, and when the protective fence 8 is made of steel, the second drone 26 lands on the protective fence 8 and electricity is applied to the electromagnet 27, thereby fixing the tip of the rope 22 to the protective fence 8.

[0043] If the protective fence 8 is not made of steel, a magnetized member may be attached to the protective fence 8 or the tip of the rope 22 may be directly connected to the protective fence 8.

[0044] Next, a maintenance method according to the present invention will be described.

[0045] First, the carriage 15 is set at a predetermined position on the bridge 1.

[0046] Next, the second drone 26 is guided along the width of the bridge 1, i.e., along the planned repair area of ​​the coating C, from the side of the bogie 15 of the bridge 1, passing under the bridge 1 to the opposite side of the bogie 15 of the bridge 1, and is then landed on the protective fence 8.

[0047] Next, the electromagnet 27 of the second drone 26 is energized to fix the second drone 26 to the protective fence 8.

[0048] This allows the rope 22 to be stretched under the bridge 1 along the width direction of the bridge 1 (i.e., along the planned flight path of the first drone 14).

[0049] Next, when the first drone 14 is flown, the hose 20 moves while being guided by the rope 22, as also shown in Figures 2 and 3 .

[0050] Therefore, the load of the hose 20 is borne by the rope 22, thereby reducing the load borne by the first drone 14.

[0051] Next, while flying the first drone 14, the pump 19 is operated to spray water from the spray nozzle 12 to clean the underside 5 of the bridge 1.

[0052] Next, while flying the first drone 14, the camera 13 photographs the coating C formed on the underside 5 of the bridge 1, and deteriorated portions of the coating C are detected.

[0053] Next, while flying the first drone 14, the pump 19 is operated to spray the raw material of the coating film C from the spray nozzle 12 to apply a top coat to the deteriorated portion of the coating film C, thereby repairing the deteriorated portion of the coating film C.

[0054] That is, the repair involves repairing the protective film C partially depending on the deterioration state of the protective film C. However, in rare cases, non-destructive testing may be conducted as necessary to determine the need for localized bridge repairs, and such repairs may be carried out.

[0055] This repair is carried out while simultaneously taking pictures with a camera 13 to detect deteriorated parts. The data detected by the camera 13 may be temporarily recorded, and repairs may be carried out based on this recorded data.

[0056] Next, the first drone 14 and the second drone 26 are returned to the side of the cart 15.

[0057] This allows the coating film C of the bridge 1 to be repaired at a constant width along the width direction of the bridge 1.

[0058] Next, the carriage 15 is moved in the lengthwise direction of the bridge 1, and repair work is carried out on the next planned repair portion of the coating film C.

[0059] According to the above configuration, repair work on the coating film C is carried out before the protective function of the coating film C for the bridge 1 is impaired, that is, repair work on the coating film C is carried out regardless of deterioration of the bridge 1, so that the coating film C is repaired before the bridge 1 deteriorates.

[0060] Therefore, deterioration of the bridge 1 can be prevented as long as the coating film C does not deteriorate, so deterioration of the bridge 1 can be prevented more effectively than in the conventional case where deterioration of the bridge 1 is detected and then the coating film C is repaired.

[0061] Furthermore, the optimum re-coating period is determined for each structure based on the remaining film thickness, and a top coat is applied periodically over the entire surface while the protective film still remains.

[0062] In any case, by first applying coating C to Bridge 1 while it is in a sound state, not only can repair costs be reduced, but the labor and time required for image analysis using a drone-mounted camera and non-destructive testing can be significantly reduced.

[0063] Furthermore, it is possible to add some maintenance devices depending on the condition of the structure, etc.

[0064] For example, in order to reduce the weight of the battery mounted on the first drone 14, it is possible to mount a generator on the cart 15, add equipment (supports) similar to the support means 21, rope 22, ring 23, second drone 26, and electromagnet 27, and support the electric cable connecting the first drone 14 and the generator movably in the same way as the hose 20.

[0065] Second Embodiment A second embodiment of the present invention will be described below with reference to the drawings.

[0066] In the second embodiment, as shown in FIG. 4, the maintenance device 11 does not use the rope 22 and the ring 23.

[0067] In addition, the configuration uses multiple first drones 14.

[0068] Even with this configuration, the same maintenance method as in the first embodiment can be implemented.

[0069] The repair work is repeated at predetermined intervals.

[0070] In addition, the repair work involves applying a coating of the raw material of the coating film C to the coating film C to restore the coating film C to its original state as much as possible.

[0071] Furthermore, in detecting the deterioration state of the coating film C, the deterioration state can be detected more easily by using a coating film C that is visible, for example, colored.

[0072] Furthermore, in the above-described embodiment, the first drone 14 is equipped with the camera 13 and the jet nozzle 12 to perform maintenance work, but the present invention may also employ work using an aerial work vehicle or a hanging rope.

[0073] Furthermore, although the jet nozzle 12 and the camera 13 are mounted on one first drone 14, they may be mounted separately on two first drones 14, or may be mounted on one first drone interchangeably.

[0074] Furthermore, the structure is not limited to a concrete structure, but may be a steel structure, a wooden structure, a resin structure, or the like.

[0075] The disclosure of the present invention described above can be summarized at least as follows.

[0076] In other words, the maintenance method of the present invention is a maintenance method for a protective film formed on the surface of a structure to protect the structure, and is characterized by comprising a detection step of photographing the protective film to detect the deterioration state of the protective film, and a repair step of repairing the deterioration state of the protective film based on the detection results of this detection step.

[0077] In addition, the maintenance device of the present invention is a maintenance device that maintains a protective film formed on the surface of a structure to protect the structure, and is characterized by comprising: a detection means that photographs the protective film and detects the deterioration state of the protective film; a raw material application means that applies protective film raw material to the protective film to repair the deterioration state of the protective film based on the detection result of the detection means; and a first flight means that is capable of flying while carrying the detection means and the raw material application means.

[0078] The present invention can include at least the following embodiments, which can be adopted separately or in combination with each other.

[0079] (1) The protective film is formed from a moisture-permeable coating film.

[0080] (2) The protective film is formed from a coating film having elasticity.

[0081] (3) The protective film is formed from a water-impermeable coating film.

[0082] (4) The protective film is formed of a coating film that is stain-resistant and has good visibility.

[0083] (5) The protective film is formed of an adhesive coating film.

[0084] (6) The repairing step includes a step of partially repairing the protective film depending on the deterioration state of the protective film.

[0085] (7) The repair process includes a process of repairing the protective film before the structure deteriorates.

[0086] (8) The repair process includes a process of repairing the protective film regardless of deterioration of the structure.

[0087] (9) The detection process and repair process include a process of repeating the process at predetermined intervals.

[0088] (10) The repair process includes a process of applying a coating of the protective film material to the protective film to restore the protective film to its original state.

[0089] (11) The detecting step includes a step of flying a first flying means equipped with a detecting means for detecting the deterioration state of the protective film to perform the detection.

[0090] (12) The repairing step includes a step of repairing the protective film by flying a first flying means equipped with a raw material supplying means for supplying the raw material of the protective film to the protective film.

[0091] (13) The repairing step includes a step of repairing the protective film while detecting its deterioration by performing the repairing step simultaneously with the detecting step.

[0092] (14) Further, the apparatus includes a moving means capable of moving on the structure, a supplying means mounted on the moving means for supplying the raw material of the protective film to the raw material supplying means, and a flexible hose for guiding the raw material from the supplying means to the raw material supplying means.

[0093] (15) Further, a support means for movably supporting the hose is provided.

[0094] (16) The support means includes a rope-like member arranged along the planned flight path of the first flight means, and a suspending member movably attached to the rope-like member for suspending the hose.

[0095] (17) The robot further includes a support member that connects the base end of the rope-like member to the moving means, and a second flying means that connects the tip end of the rope-like member and is capable of flying.

[0096] (18) The second flight means includes an electromagnet for fixing the second flight means. [Explanation of symbols]

[0097] 1 Structure (Bridge) C Protective film (coating film) 11 Maintenance equipment 12 Raw material supplying means (spray nozzle) 13 Detection means (camera) 14 First flight means (first drone) 15 Transportation (cart) 16 Means of supply 20 hose 21 Support means 22 Rope 23 Hanging member (link) 26 Second flight means (second drone) 27 Electromagnet

Claims

1. A maintenance method for a protective film formed on a surface of a structure to protect the structure, comprising the steps of: a detection step of detecting a deterioration state of the protective film; a repairing step of repairing the deteriorated state of the protective film based on the detection result of the detection step; A maintenance method comprising the steps of:

2. 2. The maintenance method according to claim 1, wherein the protective film is formed of a coating film having moisture permeability.

3. 2. The maintenance method according to claim 1, wherein the protective film is formed of a coating film having elasticity.

4. 2. The maintenance method according to claim 1, wherein the protective film is formed of a coating film having water impermeability.

5. 2. The maintenance method according to claim 1, wherein the protective film is formed of a coating film having antifouling properties and visibility.

6. 2. The maintenance method according to claim 1, wherein the protective film is formed of a coating film having adhesive properties.

7. 2. The maintenance method according to claim 1, wherein the repairing step includes a step of partially repairing the protective film depending on a deterioration state of the protective film.

8. 2. The maintenance method according to claim 1, wherein the repair step includes a step of repairing the protective film before deterioration of the structure.

9. 2. The maintenance method according to claim 1, wherein the repair step includes a step of repairing the protective film regardless of deterioration of the structure.

10. 2. The maintenance method according to claim 1, further comprising a step of repeatedly performing said detection step and said repair step at predetermined intervals.

11. 2. The maintenance method according to claim 1, wherein the repair step includes a step of applying a coating of a material for the protective film on the protective film to return the protective film to its initial state.

12. 2. The maintenance method according to claim 1, wherein the detection step includes a step of flying a first flying means equipped with a detection means for detecting the deterioration state of the protective film to detect the deterioration state.

13. 2. The maintenance method according to claim 1, wherein the repair step includes a step of repairing the protective film by flying a first flying means equipped with a raw material supplying means for supplying raw material of the protective film to the protective film.

14. 2. The maintenance method according to claim 1, wherein the repair step includes a step of repairing the protective film while detecting deterioration of the protective film by performing the repair step simultaneously with the detection step.

15. A maintenance device for maintaining a protective film formed on a surface of a structure in order to protect the structure, comprising: a detection means for detecting a deterioration state of the protective film by photographing the protective film; a raw material supplying means for supplying a raw material of the protective film to the protective film in order to repair a deteriorated state of the protective film based on a detection result of the detection means; A first flight means capable of flying while carrying the detection means and the raw material supply means; A maintenance device comprising:

16. A moving means capable of moving on the structure; a supply means mounted on the moving means for supplying a raw material of the protective film to the raw material supplying means; a flexible hose for guiding the raw material from the supply means to the raw material application means; 16. The maintenance device according to claim 15, further comprising:

17. The maintenance device according to claim 16, further comprising a support means for movably supporting the hose.

18. The maintenance device according to claim 17, characterized in that the support means comprises a rope-like member arranged along the planned flight path of the first flight means, and a hanging member movably attached to the rope-like member and suspending the hose.

19. A maintenance device as described in claim 18, characterized in that it comprises a support member that connects the base end side of the rope-like member to the moving means, and a second flying means that is capable of flying by connecting the tip side of the rope-like member.

20. 20. The maintenance device according to claim 19, wherein the second flying means includes an electromagnet for fixing the second flying means.

21. The maintenance device as described in claim 16, characterized in that it comprises a generator mounted on the moving means, a power cable for supplying power from the moving means to the first flying means, and a support device for movably supporting the power cable.

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