JP4379202B2 - Work apparatus and method for inspection and repair of steel structures - Google Patents

Description

  The present invention relates to an apparatus and a method for efficiently performing inspection and repair work on a lower surface of a steel structure such as a bridge.

  Steel structures such as bridges do not need to be inspected and repaired frequently, but they have problems such as rust and corrosion. It is necessary to carry out the above work at regular intervals. Since the work interval is long in this way, it is desirable that the equipment used for inspection and repair work should not be installed permanently, but should be installed when the work is performed. This is because if the work equipment is left installed, the equipment may break down due to rust or corrosion and become unusable. Therefore, there is a need for a technique that can quickly install or remove the equipment when performing inspection and repair work.

  On the other hand, for example, when inspecting and repairing a bridge as shown in FIG. 6, when carrying out the work on the upper surface, workers and equipment can easily move on the upper surface. The work is not easy.

  Patent Document 1 discloses a side work frame suspended on rails provided on the upper surface of a bridge and a lower work table horizontally mounted on the frame as a work vehicle for inspection and repair of a bridge. It is a large and permanently installed device.

Patent Document 2 discloses a bridge work vehicle, but this device is a device that moves under a bridge by hanging on a lower flange of the bridge, and is installed permanently using a part of the bridge. It is a device.
JP-A-61-225410 Japanese Patent Laid-Open No. 08-013421

  The technique of hanging from a bridge as in Patent Document 1 or using the lower flange of the bridge as in Patent Document 2 is a device that is large in scale and laborious to install, and is permanently installed as it is. Therefore, there is a problem with the durability of the device itself.

  When the height of steel structures such as bridges to be inspected and repaired is not so high, for example, when they are several meters or tens of meters from land or sea, work equipment should be approached from below the steel structures such as bridges. It may be possible to install it on a steel structure such as a bridge and perform inspection and repair work using the equipment. If the efficiency of this installation work can be improved, it will be effective for inspection and repair work with a frequency of once every several years. However, conventionally, no technology has been developed that can quickly and efficiently implement the equipment in such a case.

  The present invention has been made to solve such problems. The inspection of a steel structure that can improve the efficiency of inspection and repair work by improving the efficiency of installation of equipment on the lower surface of the steel structure. It is an object to provide a repair work device and method.

  In order to achieve the above object, the present invention has the following configuration.

According to the first aspect of the present invention, a traveling rail installed on the lower surface of the steel structure by sequentially connecting a plurality of rail members, and an operation that can be suspended along the traveling rail and travel along the traveling rail. A vehicle body, and a crane provided on the steel structure for lifting or hanging the work vehicle body,
The work vehicle main body includes a rail member place, a rail member transport unit, and a lifter for raising the rail member transported from the rail member place to the position of the traveling rail by the rail member transport unit to a connection position. With
The work vehicle main body is lifted by the crane, the rail member is installed on the lower surface of the steel structure, the work vehicle main body is suspended from the installed rail member, and the rail member conveying means and the lifter A work for inspection and repair of a steel structure characterized in that the work vehicle body can travel along the traveling rail composed of a plurality of the rail members which are transported from a rail member place to a predetermined position and sequentially connected. Device.

  According to a second aspect of the present invention, a crane is provided in a steel structure, a plurality of rail members are mounted on a work vehicle main body provided with rail member conveying means and a lifter, the work vehicle main body is lifted by the crane, and the rail A member is installed on the lower surface of the steel structure, the work vehicle main body is suspended from the installed rail member, and the rail member mounted on the work vehicle main body is predetermined by the rail member conveying means and the lifter. The work vehicle main body is moved forward so as to be suspended by the connected rail member, and the plurality of the plurality of the sequentially installed devices are thus connected. An inspection and repair method for a steel structure, wherein the work vehicle main body travels along a traveling rail made of a rail member to perform inspection and repair.

  According to the present invention, the work vehicle main body can be efficiently installed on the lower surface of a steel structure such as a bridge, and while using the work vehicle main body as a scaffold, installation of the traveling rail, movement of the work vehicle main body, and Inspection and repair work can be done, and after the work is completed, the rail and work vehicle body can be easily removed, so there is no need to worry about rust, corrosion, or failure as with a permanently installed device. Therefore, it is possible to obtain an apparatus and a method which are most suitable for a work with a frequency of about once, and provide a useful effect.

  Next, an embodiment of the present invention will be described with reference to the drawings.

  1 to 5 are drawings according to an embodiment of the present invention, FIG. 1 is a plan view of a work vehicle body, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. FIG. 4 is a front view showing a wheel mechanism for suspending a work vehicle main body from a traveling rail, and FIG. 5 is a side view thereof.

  As shown in the drawings, an inspection / repair work device 1 according to the present invention includes a work vehicle main body 2, a traveling rail 3 installed on the lower surface of a steel structure 14, and a crane 4 stored in the steel structure 14. It has.

  The work vehicle main body 2 includes a rectangular floor portion 5 and a frame body 6 provided around and above the floor portion 5. The floor 5 is provided with a rail member place 7 on its upper surface, and a plurality of rail members 3 a constituting the traveling rail 3 are mounted on the rail member place 7. The work vehicle main body 2 is provided with suspension portions 8 and 8 at a predetermined interval. The distance between the suspension parts 8 and 8 is the same as the distance between the traveling rails 3 and 3 installed on the lower surface of the steel structure 14. Two suspension mechanisms 8 are provided with two wheel mechanisms 9, and the work vehicle main body 2 is suspended from the traveling rail 3 via the wheel mechanism 9 and the suspension portion 8. The wheel mechanism 9 is driven by using the engine generator 10 as a drive source, and the work vehicle main body 2 can travel along the traveling rail 3.

  A lifter 13 is provided on the suspension part 8. The lifter 13 can mount the rail member 3 a, lift the loaded rail member 3 a, and can move the lifted rail member 3 a in the longitudinal direction of the traveling rail 3 and project to the tip of the existing traveling rail 3. Thus, the traveling rail 3 can be extended.

  In the work vehicle main body 2, a hoist rail 11 is installed in a horizontal direction perpendicular to the longitudinal direction of the traveling rail 3 at a predetermined height from the floor 5. The hoist rail 11 is provided with an electric motor hoist 12 capable of gripping the rail member 3 a, and the hoist 12 can travel along the hoist rail 11.

  The crane 4 is stored in the steel structure 14. The steel structure 14 is provided with an opening 17 from which the wire of the crane 4 enters and exits. The crane 4 has a function of lifting the work vehicle main body 2 to approach the lower surface of the steel structure 14.

  Next, an embodiment of the present invention will be described.

  6 to 11 are drawings according to an embodiment of the present invention, FIG. 6 is a side view showing the whole steel structure to be inspected and repaired, and FIG. 7 is a plan view showing the whole steel structure. 8 is a side view for explaining the work process, FIG. 9 is a cross-sectional view of FIG. 8, FIG. 10 is a side view showing the next process, and FIG. 11 is a side view showing the next process.

  In this embodiment, the traveling rail 3 and the work vehicle main body 2 are installed on the lower surface of the steel structure 14 shown in FIG. 6, and inspection and repair are performed. The steel structure 14 includes leg portions 15 at four locations in the longitudinal direction. As shown in FIGS. 6 and 7, the lower surface of the steel structure 14 is divided into two sections in the width direction between the leg portions 15, 15, and the traveling rail 3 of the steel structure 14 is divided into each section. Two are installed along the longitudinal direction, the work vehicle body 2 is suspended from the installed traveling rail 3 and traveled, and the lower surface of the steel structure 14 is inspected and repaired. The crane 4 is stored in advance in all sections. That is, in this steel structure 14, six cranes 4 are stored in six sections.

  As the work process, first, as shown in FIGS. 8 and 9, the work ship 16 on which the work vehicle body 2 is placed is brought close to the water surface 18 below the steel structure 14 to perform inspection and repair work. That is, the work boat 16 is positioned in one of the above-described sections. At this time, in the suspension part 8 of the work vehicle main body 2, the rail member 3 a is fitted in the wheel mechanism 9 in advance. Therefore, by attaching the rail member 3a to the lower surface of the steel structure 14, the work vehicle main body 2 is suspended from the rail member 3a (which is a part of the traveling rail 3) installed. In addition, a plurality of rail members 3 a are mounted in advance on the rail member place 7 provided on the floor portion 5 of the work vehicle main body 2.

  Next, the crane 4 is operated to lift the work vehicle main body 2 and bring the work vehicle main body 2 closer to the lower surface of the steel structure 14. And the rail member 3a currently fitted in the wheel mechanism 9 of the suspension part 8 is installed in the lower surface of the steel structure 14 by a predetermined method, for example, bolting. The installation direction of the rail member 3 a is the longitudinal direction of the steel structure 14. As a result, the work vehicle body 2 is suspended from the traveling rail 3 by the wheel mechanism 9 and the suspension portion 8. When the work vehicle main body 2 is suspended in this manner, inspection and repair work at this position are performed by an operator. The installation of the rail member 3a and the suspension work of the work vehicle body 2 and the inspection and repair work of the lower surface of the steel structure 14 may be performed simultaneously by different workers. Parallel work is easily possible.

  Next, as shown in FIG. 10, in the work vehicle main body 2, the hoist 12 grips the rail member 3 a of the rail member place 7, and the hoist rail 11 travels to carry the rail member 3 a to the suspension portions 8 on both sides. Furthermore, the rail member 3a that has arrived at the suspension portion 8 is placed on the lifter 13, the loaded rail member 3a is lifted, the lifted rail member 3a is moved in the longitudinal direction of the traveling rail 3, and is projected to the tip of the existing traveling rail 3, Installed to extend the traveling rail 3. 8 and 9, the engine mechanism 10 drives the wheel mechanism 9 to move the work vehicle main body 2 along the traveling rail 3 including the new rail member 3 a installed. In this way, the inspection, repair work in one section is completed by repeating the movement, inspection, and repair work of the work vehicle main body 2 as shown in FIG.

  The method described above is a method in which the work vehicle main body 2 is repeatedly moved, inspected, and repaired. However, the travel rail 3 is first installed for the entire length, and then the work vehicle main body 2 is moved. The inspection and repair work can be performed continuously by repeatedly stopping.

  The work in one section is as described above. However, as shown in FIGS. 6 and 7, when there are six sections to be worked on, when the work in one section is completed, the reverse of the above is performed. The traveling rail 3 is removed by the procedure described above, the work vehicle main body 2 is suspended by the crane 4 and placed on the work ship 16, carried to another section by the work ship 16, and the above steps are performed again. If this is repeated 6 times, the work for 6 sections is completed. If a plurality of sets of such inspection and repair work devices 1, that is, the work vehicle main body 2, the traveling rail 3, and the crane 4 are prepared, for example, six sets are prepared as shown in FIG. If completed, the work is completed at a speed six times that of the above embodiment.

  Furthermore, after the work vehicle body 2 and the traveling rail 3 are removed and removed, the work vehicle main body 2 and the traveling rail 3 can be used for inspection and repair work of another steel structure.

  However, the crane 4 is not removed, but the opening 17 is closed and stored in the steel structure 14. Thereby, since the crane 4 can be stored in a sealed state, it can be used again after the next time, for example, 10 years later.

  In the above-described embodiment, the example in which the work vehicle main body 2 is approached from the surface of the water to the lower surface of the steel structure 14 is shown, but it is needless to say that the work vehicle body 2 may be approached from the land or the like.

The top view of the work vehicle body concerning one embodiment of the present invention. Sectional drawing which follows the AA line of FIG. Sectional drawing which follows the BB line of FIG. The front view of the C section of FIG. 3 which shows the wheel mechanism which suspends the work vehicle main body which concerns on one Embodiment of this invention to a traveling rail. The side view of the C section of FIG. 3 which shows the wheel mechanism which suspends the work vehicle main body which concerns on one Embodiment of this invention to a traveling rail. Side view of steel structure according to one embodiment of the present invention The top view of the steel structure which concerns on one Example of this invention The side view explaining the work process which concerns on one Example of this invention Cross-sectional view of FIG. The side view explaining the work process which concerns on one Example of this invention The side view explaining the work process which concerns on one Example of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work apparatus for inspection and repair 2 Work vehicle main body 3 Traveling rail 3a Rail member 4 Crane 5 Floor part 6 Frame body 7 Rail member place 8 Suspension part 9 Wheel mechanism 10 Engine motor 11 Hoist rail 12 Electric motor hoist 13 Lifter 14 Steel structure 15 leg 16 work boat 17 opening 18 water surface

Claims (2)

A traveling rail installed on the lower surface of the steel structure by sequentially connecting a plurality of rail members, a work vehicle body suspended from the travel rail and capable of traveling along the travel rail, and the work vehicle body A crane provided on the steel structure for lifting or hanging,
The work vehicle main body includes a rail member place, a rail member transport unit, and a lifter for raising the rail member transported from the rail member place to the position of the traveling rail by the rail member transport unit to a connection position. With
The work vehicle main body is lifted by the crane, the rail member is installed on the lower surface of the steel structure, the work vehicle main body is suspended from the installed rail member, and the rail member conveying means and the lifter A work for inspection and repair of a steel structure characterized in that the work vehicle body can travel along the traveling rail composed of a plurality of the rail members which are transported from a rail member place to a predetermined position and sequentially connected. apparatus.   A crane is provided in the steel structure, a plurality of rail members are mounted on a work vehicle main body provided with rail member conveying means and a lifter, the work vehicle main body is lifted by the crane, and the rail member is placed on the lower surface of the steel structure. The work vehicle main body is suspended from the installed rail member, and the rail member mounted on the work vehicle main body is already installed by the rail member conveying means and the lifter to a predetermined position. The work vehicle body is moved forward so as to be connected to the rail member and suspended from the connected rail member, and along the traveling rail composed of the plurality of rail members sequentially installed in this manner. A method for inspecting and repairing a steel structure, wherein the main body of the work vehicle is run for inspection and repair.

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