JP2023038567A - Repair method and repair device for welded part of steel plate deck - Google Patents

Abstract

To provide a repair method and a repair device for a welded part of a steel plate deck that can inspect and repair striking-through of a welded part in a trough rib without making a person enter the trough rib.SOLUTION: A self-running-type inspection device mounted with a camera 26 is made to run, along a longitudinal direction of a trough rib 3, in the trough rib 3, and an image of a welded part in the trough rib 3 photographed with the camera 26 of the inspection device is outputted to an external monitor, so as to measure a position of striking-through of the welded part confirmed by the monitor, and a self-running-type scraping-off device 20 is moved to the position of the striking-through, so that the scraping-off device 20 scrapes off a weld bead 4a having the striking-through caused.SELECTED DRAWING: Figure 13

Description

The present invention relates to a steel deck weld repair method and apparatus for repairing weld strike-through in a trough rib welded to a steel deck of a bridge.

Conventionally, as deck slabs used in bridges, steel deck slabs formed by welding steel trough ribs for reinforcement to the underside of flat deck plates made of steel plates are known (see, for example, Patent Document 1). .

The trough rib is formed in a substantially U shape and joined to the steel plate of the deck plate by fillet welding. When welding, a groove is formed on the joint end face of the trough rib, and welding is performed along the longitudinal direction of the trough rib from the outside of the trough rib.

JP 2008-307561 A

However, when fillet welding is performed from the outside of the trough rib, melt-through may occur in the weld. In such a case, the weld bead that strikes through remains inside the trough rib. Or it was not possible to visually confirm from the outside after welding.

On the other hand, in recent years, steel floor slabs, in which the inside of the trough rib is ventilated by an air drying system without providing partition walls, have begun to spread. Since the interior of such a steel deck trough rib is not sealed with partition walls, it is possible to inspect the entire interior of the trough rib from an opening at one end in the longitudinal direction. However, since the opening of the trough rib is not large enough for a person to enter and has a long overall length (for example, 25 m), it is difficult to manually inspect and repair the weld in the trough rib.

The present invention has been made in view of the above problems, and an object thereof is to provide a steel floor slab capable of inspecting and repairing strike-through of a welded portion in a trough rib without a person entering the trough rib. The object of the present invention is to provide a method and apparatus for repairing welded portions.

In order to achieve the above object, the present invention provides a steel deck weld zone repair method for inspecting and repairing strike-through of welds in trough ribs welded to a steel deck deck plate. The mold inspection device is run in the trough rib along the longitudinal direction of the trough rib, and the image of the welded part in the trough rib imaged by the camera is output to an external monitor, and the strike through of the welded part confirmed by the monitor is output. In addition to measuring the position of the portion, a self-propelled scraping device is moved to the position of the strike-through portion, and the strike-through weld bead is scraped off by the scraping device.

Further, in order to achieve the above object, the present invention provides a steel deck welded portion repairing apparatus for inspecting and repairing strike-through of welded portions in trough ribs welded to a deck plate of a steel deck plate, which is equipped with a camera. , a self-propelled inspection device that travels in the trough rib along the longitudinal direction of the trough rib, a monitor that is arranged outside the trough rib and outputs an image of the welded part in the trough rib captured by the camera, and confirmation by the monitor a position measuring means for measuring the position of the strike-through portion of the welded portion; ing.

As a result, the presence or absence of a weld bead that has penetrated into the trough rib is inspected by the inspection device, and the weld bead that has penetrated into the trough rib is scraped off by the scraper. It becomes possible to inspect and repair omissions.

According to the present invention, it is possible to inspect and repair weld strike-through in a trough rib without a person entering the trough rib. And repair can be efficiently performed at a factory or an existing bridge, and the quality and durability of the steel floor slab can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS Partial perspective view of a steel floor slab showing one embodiment of the present invention Partial perspective view of steel floor slab facing upward Main part front view of steel deck Main part front sectional view of steel floor slab Top view of inspection equipment Block diagram of inspection equipment Top view of scraping device Top view of rotary blade Enlarged side view of main part of rotary blade Block diagram of scraping device Plan view showing the operation of the inspection device Diagram showing monitor screen Plan view showing the operation of the scraping device Front cross-sectional view of the main part showing the welding bead cutting process Front cross-sectional view of the main part showing the welding bead cutting process Front cross-sectional view of the main part showing the welding bead cutting process Principal part front sectional drawing which shows other embodiment of the scraping-off apparatus

1 to 1 show an embodiment of the present invention, showing a weld repair method for inspecting and repairing strike-through of a weld in a trough rib of a steel deck and an apparatus used therefor.

A steel deck 1 shown in the figure has a flat deck plate 2 made of a steel plate, and a plurality of reinforcing trough ribs 3 are welded to the lower surface of the deck plate 2 . The trough rib 3 is made of a steel material formed in a substantially U-shape, and is welded to the deck plate 2 in a factory or the like with the steel deck 1 turned upside down as shown in FIGS. 2 and 3 . At that time, a groove is formed on the joining end surface of the trough rib 3 and the trough rib 3 is welded along the longitudinal direction from the outside.

When fillet welding is performed from the outside of the trough rib 3 , the welded portion 4 may cause melt-through inside the trough rib 3 . In such a case, a weld bead 4a that strikes through remains inside the trough rib 3 as shown in FIG.

The repairing apparatus of this embodiment includes a self-propelled inspection device 10 for inspecting the presence or absence of a weld bead 4a that penetrates into the trough rib 3, and a self-propelled scraping device 20 that scrapes off the weld bead 4a in the trough rib 3. It consists of

The inspection apparatus 10 includes an apparatus main body 11 that can enter into the trough rib 3, a traveling device 12 that makes the device main body 11 travel, an operation unit 13 that remotely operates the traveling device 12, and a camera 14 mounted on the device main body 11. , a monitor 15 for outputting an image of the camera 14, and a measuring tool 16 as a position measuring means for measuring the position of the apparatus main body 11. FIG.

The travel device 12 includes a drive mechanism, a steering mechanism, a battery, and the like (not shown), and drives wheels 11a attached to the device main body 11 to cause the device main body 11 to travel.

The operating unit 13 is connected wirelessly or by wire to the traveling device 12 so that the operator can operate the traveling device 12 such as forward movement, backward movement, and steering of the device body 11 .

The camera 14 is a well-known high-definition camera that captures an image in front of the device main body 11 and has a function of recording the captured image.

The monitor 15 is connected to the camera 14 wirelessly or by wire, and is arranged together with the operation unit 13 on the operator side.

The measuring tool 16 consists of a belt-like measure used for a well-known tape measure, one end of which is connected to the rear end of the device main body 11 and the other end side is arranged outside the trough rib 3 .

The scraping device 20 includes a device main body 21 that can enter into the trough rib 3 , a traveling device 22 that makes the device main body 21 travel, a holding device 23 that can hold the device main body 21 within the trough rib 3 , and a strike-through inside the trough rib 3 . A cutting machine 24 for scraping the weld bead 4a, an operation unit 25 for remotely controlling the traveling device 22, the holding device 23 and the cutting machine 24, a camera 26 mounted on the cutting machine 24, and a monitor that outputs the image of the camera 26 27.

The travel device 22 includes a drive mechanism, a steering mechanism, a battery, and the like (not shown), and drives wheels 21a attached to the device main body 21 to cause the device main body 21 to travel.

The holding device 23 has a pair of holding portions 23a provided on both side surfaces of the device main body 21, and each holding portion 23a is provided movably in the width direction of the device main body 21 by a driving mechanism such as a cylinder (not shown). ing. Each holding portion 23a is provided with a guide roller 23b that contacts the inner surface of the trough rib 3. As shown in FIG.

The cutting machine 24 includes an arm 24a rotatably provided on the apparatus main body 21, a cutting head 24b provided at the tip of the arm 24a, and a rotary blade 24c attached to the cutting head 24b. The cutting head 24b is moved to the cutting position, and the object to be cut is cut off by the rotary blade 24c. As shown in FIG. 8, the rotating blades 24c are provided at four positions in the circumferential direction around a rotating shaft 24d at regular intervals, and are rotated horizontally around the rotating shaft 24d by a driving mechanism such as a motor (not shown). ing. 9, the rotary blade 24c is formed so that the blade edge angle .theta. A guide portion 24e that abuts on the inner surface of the trough rib 3 is provided above the rotary blade 24c. there is

The operation unit 25 is connected wirelessly or by wire to the traveling device 22, the holding device 23 and the cutting machine 24, and operates the traveling device 12 such as advancing, retreating, and steering the device main body 21, and holding such as movement of each holding portion 23a. An operator operates the device 23 and the cutting machine 24 such as rotation of the arm 24a and rotation of the rotary blade 24c.

The camera 26 consists of a well-known high-definition camera, and is designed to capture an image of the cutting position of the cutting machine 24 .

The monitor 27 is connected to the camera 26 wirelessly or by wire, and is arranged together with the operation unit 25 on the operator's side.

Hereinafter, the inspection process by the inspection device 10 and the scraping process by the scraping device 20 will be described for the method of repairing the welded portion according to the present embodiment.

First, in the inspection process, the apparatus main body 11 of the inspection apparatus 10 is arranged at one end side of the trough rib 3 and is moved toward the other end side of the trough rib 3 as shown in FIG. At this time, the camera 14 is used to image the front of the device main body 11 while driving, and the image is output to the monitor 15 and recorded as a moving image in a storage device (not shown). As shown in FIG. 12, the inner surfaces of the deck plate 2 and the trough rib 3 are displayed on the screen 15a of the monitor 15, and the operator moves the apparatus body 11 while watching the image on the monitor 15. Further, the measuring tool 16 is drawn out into the trough rib 3 together with the traveling device main body 11 .

Here, when the operator confirms from the image on the monitor 15 that the weld bead 4a that strikes through the trough rib 3 is generated at the boundary portion between the deck plate 2 and the trough rib 3, the apparatus main body 11 is located at the position of the weld bead 4a. is stopped, and the position of the weld bead 4a is measured by the measuring tool 16. In this case, as shown in FIG. 11, the distance L from the apparatus body 11 to one end of the trough rib 3 is measured by reading the scale of the measuring tool 16, and the measured distance is recorded as the position of the weld bead 4a.

Next, in the scraping step, the device main body 21 of the scraping device 20 is arranged at one end side of the trough rib 3, and the device main body 21 is moved toward the other end side of the trough rib 3 to the position of the weld bead 4a. . At that time, since the measured distance L from one end of the trough rib 3 to the weld bead 4a is recorded in the inspection process, the device body 21 is moved to the position of the weld bead 4a based on the distance L. Also, the position and state of the weld bead 4a are confirmed by the video recorded by the camera 14. FIG. After the device main body 21 is moved to the cutting position as shown in FIG. 13, each holding portion 23a of the holding device 23 is moved outward in the width direction to abut against the inner surface of the trough rib 3, thereby 21 is held so as not to move in the width direction. At this time, each holding portion 23a of the device main body 21 is in contact with the inner surface of the trough rib 3 via the guide roller 23b, so that the device main body 21 can move in the front-rear direction (longitudinal direction of the trough rib 3). is held in

Subsequently, the weld bead 4 a is scraped off by the cutter 24 of the scraper 20 . That is, as shown in FIG. 14, the arm 24a moves the cutting head 24b to the cutting position, and as shown in FIG. 15, the rotary blade 24c is pressed against the weld bead 4a and rotated to cut the weld bead 4a. At this time, the welding bead 4a is cut along the boundary portion between the deck plate 2 and the trough rib 3 while moving the device body 21 in the front-rear direction by the traveling device 22 . In addition, since the cutting edge angle θ of the rotary blade 24c is equal to the angle formed by the inner surface of the trough rib 3 and the deck plate 2, the weld bead 4a is cut so as to be flush with the inner surface of the trough rib 3. Since the guide portion 24e abuts against the inner surface of the trough rib 3 during cutting, the movement of the cutting edge of the rotary blade 24c is restricted at the inner surface position of the trough rib 3. As shown in FIG. In such a cutting operation, the cutting location is displayed on the monitor 27 by the camera 26, and the operator operates the cutting machine 24 and the travel device 22 while viewing the image to perform the cutting operation. By scraping off the weld bead 4a in this manner, the strike-through portion on the inner surface of the trough rib 3 is repaired so as to be flush with the other portions as shown in FIG.

As described above, according to the present embodiment, the self-propelled inspection device 10 equipped with the camera 14 is caused to travel in the trough rib 3 along the longitudinal direction of the trough rib 3, and the trough rib imaged by the camera of the inspection device 10 is detected. Output the image of the welded part in 3 to the external monitor 15, measure the position of the strike-through of the welded part confirmed by the monitor 15, move the self-propelled scraping device 20 to the position of the strike-through, Since the strike-through weld bead 4a is scraped off by the scraper 20, the strike-through of the welded part in the trough rib 3 can be inspected and repaired without a person entering the trough rib 3. - 特許庁As a result, it is possible to efficiently inspect and repair weld strike-through in the trough rib 3, which does not have a partition wall inside, at a factory or an existing bridge, and improve the quality and durability of the steel floor slab. .

A measuring tool 16 having one end connected to the main body 11 of the inspection apparatus 10 is used to measure the distance L from a predetermined position (one end) in the longitudinal direction of the trough rib 3 to the main body 11 of the welding part. Since the position of the strike-through portion is measured, the position of the strike-through portion can be easily measured without using a complicated structure.

Further, since the holding device 23 is provided for holding the device main body 21 of the scraping device 20 within the trough rib 3 by contacting the inner surface of the trough rib 3, the device main body 21 can be held within the trough rib 3 during cutting. You can work stably.

In addition, since the scraping device 20 has a rotary blade 24c having a cutting edge angle .theta. can be cut, and the weld bead 4a that has penetrated can be almost completely removed.

Furthermore, a guide portion 24e is provided in the vicinity of the rotary blade 24c to contact the inner surface of the trough rib 3, and the guide portion 24e is brought into contact with the inner surface of the trough rib 3 during cutting. Since the position is regulated, excessive cutting by the rotary blade 24c can be prevented, and the strike-through weld bead 4a can be accurately cut.

In the above-described embodiment, the strike-through weld bead 4a is scraped off by cutting it with the rotary blade 24c. As in the embodiment, a grinder 28 is used, and a spherical grindstone 28a provided at the tip of the grinder 28 is rotated and pressed against the weld bead 4a, thereby grinding and scraping off the strike-through weld bead 4a. good.

Further, the above-described embodiment is an example of the present invention, and the configurations of the inspection device 10 and the scraping device 20 are not limited to those described in the above-described embodiment.

DESCRIPTION OF SYMBOLS 1... Steel deck 2... Deck plate 3... Trough rib 4... Welding part 4a... Welding bead 10... Inspection apparatus 11... Apparatus main body 12... Traveling apparatus 13... Operation part 14... Camera 15 DESCRIPTION OF SYMBOLS -- Monitor 20 -- Scraping device 21 -- Apparatus main body 22 -- Traveling device 23 -- Holding device 24 -- Cutting machine 25 -- Operation part 26 -- Camera, 27 -- Monitor, 28 -- Grinder.

Claims (8)

In a steel deck weld repair method for inspecting and repairing strike-through of a weld in a trough rib welded to a steel deck deck plate,
A self-propelled inspection device equipped with a camera is run in the trough rib along the longitudinal direction of the trough rib,
outputting an image of the welded part in the trough rib imaged by the camera to an external monitor;
In addition to measuring the position of the strike-through part of the weld confirmed by the monitor,
A method for repairing a welded portion of a steel floor slab, characterized by moving a self-propelled scraping device to the position of the strike-through portion and scraping off the strike-through weld bead by the scraping device. A measuring device having one end connected to the inspection device is used to measure the distance from a predetermined position in the longitudinal direction of the trough rib to the inspection device, thereby measuring the position of the strike-through portion of the weld. The method for repairing a welded portion of a steel floor slab according to claim 1. 3. The method of repairing a welded portion of a steel floor slab according to claim 1, wherein the scraping device is held in the trough rib by a holding device that abuts on the inner surface of the trough rib, and the weld bead is scraped off by the scraping device. 4. The method of repairing a welded portion of a steel floor slab according to claim 1, 2 or 3, wherein said weld bead is scraped off using a rotary blade having a cutting edge angle equal to the angle formed between said inner surface of said trough rib and said deck plate. . In a steel deck weld zone repair device for inspecting and repairing strike-through of welds in trough ribs welded to a steel deck deck plate,
A self-propelled inspection device equipped with a camera and traveling in the trough rib along the longitudinal direction of the trough rib;
a monitor that is arranged outside the trough rib and outputs an image of the welded part in the trough rib that is captured by the camera;
a position measuring means for measuring the position of the strike-through portion of the weld confirmed by the monitor;
and a self-propelled scraping device that moves to the position of the strike-through portion measured by the position measuring means and scrapes off the strike-through weld bead. The position measuring means comprises a measuring tool having one end connected to an inspection device, and measures the position of the strike-through portion of the weld by measuring the distance from a predetermined position in the longitudinal direction of the trough rib to the inspection device with the measuring tool. The apparatus for repairing a welded portion of a steel floor slab according to claim 5, characterized in that: 7. The apparatus for repairing a welded portion of a steel floor slab according to claim 5, further comprising a holding device that holds the scraping device within the trough rib by coming into contact with the inner surface of the trough rib. 8. The apparatus for repairing a welded portion of a steel floor slab according to claim 5, 6 or 7, wherein the scraping device has a rotary blade having a cutting edge angle equal to the angle formed by the inner surface of the trough rib and the deck plate.

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