JPH0437902B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a bridge maintenance device for inspecting and repairing the underside of bridge bodies such as steel bridges, and in particular, it can be easily installed on existing bridges and This invention relates to a bridge maintenance device that can move along a bridge body.

[Prior Art] Bridges come in various shapes, but steel bridges require anti-rust treatment. In addition, since it is a welded structure and vehicles such as cars are constantly running on top of it, it is constantly subjected to dynamic loads, so it is necessary to inspect it for fatigue failure.

In this way, steel bridges are required to undergo various inspections for safety management purposes, but in many cases, the upper surface of the bridge is the road, and if inspections of the lower surface of the bridge body are carried out on the bridge body, it may impede traffic. There's a problem. Therefore, maintenance work such as inspections is mainly carried out using work scaffolds erected on the underside of the bridge body.

[Problems to be Solved by the Invention] Conventionally, when scaffolding was erected on the underside of the bridge body, an inspection vehicle such as an outrigger was run on the bridge body, the work scaffold was suspended from the inspection vehicle, and the boom, etc. Scaffolding is placed on the underside of the bridge body for maintenance, but it occupies the road surface for a long time and has the problem of interfering with traffic.

In addition, maintenance work has also been carried out by suspending work scaffolds from the bridge body using chains, etc., but in this case, work must be done at height, which poses safety issues, and the work scaffolds must be attached to the entire surface of the bridge body for one span. In addition, it takes a long time to install and remove the scaffolding, which is problematic, and the scaffolding material has a large number of parts and tends to be expensive.

[Object of the invention] The present invention has been made in consideration of the above circumstances, and
To provide a bridge maintenance device that can be easily attached to the lower surface of a bridge body and can be moved along the lower surface of the bridge body to perform maintenance on the entire surface.

[Summary of the Invention] In order to achieve the above object, the present invention includes a pair of moving rails arranged along longitudinal parallel girders on the lower surface of a bridge body, and a pair of moving rails provided at the front and rear ends of the moving rails. A rail clamp device that releasably suspends a moving rail on a vertical girder, a working girder that is movably spanned along the moving rail and is provided to be movable up and down with respect to the moving rail, and the working girder. A clamp device for a working girder is detachably suspended from the longitudinal girder, and one side is connected to the moving rail and the other side is connected to the working girder side, and the clamping device is connected to the working girder along the moving rail or to the working girder. It is equipped with a moving cylinder means for moving the moving rail, and maintenance of the entire span of the bridge body can be performed by moving this working girder relative to the moving rail, and when installed on the bridge, it is equipped with a moving cylinder means for moving the moving rail. After the work girder is suspended from the bridge using a special suspension vehicle or a retsu car, the clamp device can be attached to the vertical girder on the underside of the bridge body. This means that there is almost no obstruction to traffic.

[Embodiment] A preferred embodiment of the bridge maintenance device according to the present invention will be described below with reference to the accompanying drawings.

In Figures 1 and 2, 1 is a bridge body such as a steel bridge, which has a floor plate 2 on its upper part, and the floor plate 2 on its lower part.
It has vertical beams 3 such as I-beams that support the. The longitudinal beams 3 are provided along the length direction of the bridge body 1, and are arranged in parallel at appropriate intervals in the width direction. The longitudinal girders 3 facing each other in the width direction of the lower surface of the bridge body 1, for example, the outer longitudinal girder 3 on the right side as shown in FIG.
A pair of parallel moving rails 4 are arranged along the longitudinal beams 3a and 3b, respectively, and a longitudinal beam 3b spaced one distance from the longitudinal beam 3a. This moving rail 4 is
A rail clamp device 6 is provided at the front and rear ends of the rail suspension beam 5 via a rail suspension beam 5, and the movable rail 4 is detachably suspended from the vertical beams 3a and 3b by the clamp device 6.

A working girder 8 is provided on the movable rail 4 and is movable along the movable rail 4 and can be raised and lowered by an extendable hanger 7.

As shown in FIG. 4, support fittings 10 for supporting rollers 9 sliding on the movable rail 4 are provided at the upper end of the telescopic hanger 7 so as to be located on both sides of the movable rail 4. A suspension beam 11 is provided, on which a clamping device 12 for a working girder is provided.

The work girder clamp device 12 and the rail clamp device 6 consist of inverted L-shaped clamp fittings 1 that are slidably provided on clamp fitting pressers 13 provided along the suspension beams 5 and 11, respectively.
4 is moved in the direction of clamping or separating from the flange part 15 of the vertical beam 3a (or 3b), so that it can be clamped and engaged with the flange part 15 or can be separated from the flange part 15.

The moving rail 4 freely moves between the upper end of the telescopic hanger 7 of the work girder 8, the supporting metal fittings 10 provided on both sides of the upper end of the telescopic hanger 7, and the working suspension beam 11 provided on the supporting metal fittings 10. It is provided so that it can slide, and as shown in FIG. 3, support fittings 10a,
A cylinder portion 19 of a moving cylinder means 18 such as a hydraulic cylinder is attached between the moving cylinder means 10b, and the tip of a rod portion 20 of the moving cylinder means 18 is attached to the moving rail 4. This moving cylinder means 18 is for moving the telescopic hanger 7 (work girder 8) relative to the movable rail 4, or the movable rail 4 relative to the telescopic hanger 7, for example, as shown in FIG. , if the telescopic hanger 7 (working girder 8) is located at the left end of the moving rail 4, the rod portion 20 of the moving cylinder means 18 is in the maximum extension state, and when it is retracted, it will move along the moving rail 4. The telescopic hanger 7 or the movable rail 4 moves, and the telescopic hanger 7 relatively moves to the right end of the movable rail 4.

The working girder 8 is provided so as to be able to rise and fall freely by expanding and contracting the extendable hanger 7, and is provided to extend in the width direction of the bridge body 1. An auxiliary work girder 21 is slidably housed with respect to the work girder 8 so as to be freely retractable from one end of the work girder 8, that is, from the end side of the bridge body 1 on the substantially central side (right end) as shown in FIG. The end of the auxiliary working girder 21 can extend below the bridge body 1 on the right side in the figure. A work platform 22 that can be raised and lowered is provided on the auxiliary work girder 21 so as to be movable along the auxiliary work girder 21. That is, a traveling rail 23 is provided on the auxiliary work girder 21, and a work platform 22 is provided on a trolley 24 that travels along the traveling rail 23. This workbench 22 can be raised up to the side of the longitudinal girder 3 as shown in FIG.
It is configured to be able to move up and down along the bridge body 1 and cross the width direction of the bridge body 1. Further, an insertion hole 25 is provided at the rear end of the auxiliary working girder 21 for inserting a suspension rod of a suspension vehicle to be described later.

Next, the operation of the present invention will be explained.

As shown in FIG. 1, it is assumed that a moving rail 4 is suspended by a rail clamping device 6 along longitudinal beams 3a and 3b of a bridge body 1. In this case, maintenance of the bridge body 1 in the width direction of the working girder 8 can be carried out by expanding and contracting the auxiliary working girder 21 of the working girder 8 with respect to the working girder 8, and moving the working platform 22 up and down as appropriate.

Next, the case of moving the working girder 8 will be explained based on FIGS. 5 to 7.

During normal maintenance, both the rail clamp device 6 of the moving rail 4 and the work girder clamp device 12 of the work girder 8 are connected to the flange portions 15 of the longitudinal girders 3a and 3b.
However, when moving the working girder 8 with respect to the moving rail 4, release the working girder clamp device 12 at the upper end of the telescopic hanger 7 and release it from the flange portions 15 of the vertical girders 3a and 3b. state. In this state, by appropriately expanding and contracting the rod portion 20 of the movable cylinder means 18, the roller 9 supported by the support fitting 10 at the upper end of the telescopic hanger 7 is moved.
slides along the moving rail 4, and the working girder 8 runs back and forth with respect to the moving rail 4 as shown in FIG. is held and maintained on the workbench 22 as described above.

Next, as shown in FIG. 6, when the work girder 8 has finished moving to the end of the moving rail 4 in the running direction, the work girder clamp device 12 at the upper end of the telescopic hanger 7
The flange portions 15 of the longitudinal beams 3a and 3b are held in a sandwiched state, and the rail clamp devices 6 at the front and rear ends of the moving rail 4 are separated from the flange portions 15 to be in a free state. If the rod portion 20 of the moving cylinder means 18 is retracted in this state, the moving rail 4 will move forward in the traveling direction as shown in FIG. After the moving rail 4 is moved, the flange portion 15 is clamped by the rail clamping devices 6 at the front and rear ends of the moving rail 4, and the working girder 8 is moved onto the moving rail in the same manner as described above with the working girder clamping device 12 of the working girder 8 free. move along.

In this way, it becomes possible to appropriately move the working girder 8 along the bridge body 1 and perform maintenance on the entire surface of the bridge body 1.

In this case, instead of a worker being placed on the workbench 22, a painting robot or an inspection robot may be placed on the workbench 22 to automatically carry out the process by remote control.

Next, the case where the bridge maintenance device of the present invention is attached to the lower surface of the bridge body 1 will be explained with reference to FIGS. 8 to 12.

As shown in Figure 8, long body truck 3
The work girder 8 and the like are placed on the bridge body 1 and transported to a predetermined location on the bridge body 1. In this case, the auxiliary work girder 21 is the work girder 8.
The telescopic hanger 7 and the workbench 22 are also kept in a retracted state. Behind this truck 30, a special suspension vehicle 31 for suspending the working girder 8 and the like is also moved to a predetermined location on the bridge body 1 at the same time.

Next, as shown in FIG. 9, the suspension rod 32 of the suspension vehicle 31 is erected, and the working girder 8 is lifted from the upper end of the rod 32 with the wire 33.
After unloading the load from 0, make the suspension rod 32 vertical as shown in Fig. 10, and in that state,
When the rod 32 is rotated 90 degrees after inserting the lower end of the rod 32 into the insertion hole 25 provided in the auxiliary working beam 21, the auxiliary working beam 21 is automatically locked onto the rod 32. In this state, the telescopic hanger 7 of the work girder 8 is in an extended state.

Next, as shown in FIGS. 11 and 12, the suspension rods 32 lift the working girder 8, and at the same time, the suspension rods 32 are swiveled to the outside of the bridge body 1, and then the working girder 8 is lifted from the side. is lowered along the bridge body 1 to below the bridge body 1. After that, as shown in FIG. 12, the suspension rods 32 are turned 90 degrees to align the working girder 8 along the width direction of the lower surface of the bridge body 1, and then the rail clamping device 6 and the working girder clamping device 12 are used to vertically Flange portions 15 of girders 3a and 3b
The movable rail 4 and the working girder 8 are held together by the longitudinal girder 3.
It is suspended from a and 3b.

After that, the lock can be released by moving the suspension rod 32 downward, and then by rotating it 90 degrees and moving it downward, the rod 32 will automatically come out of the insertion hole 25 of the auxiliary work girder 21, and the rod 32 will be removed again. When the work girder 8 is moved upward, the installation of the working girder 8 is completed.

The installation work by the suspension vehicle 31 only takes a very short time, and the traffic is only interrupted when the work girder 8 is installed, and the traffic is not obstructed as a whole.

It goes without saying that in addition to attaching the working girder 8 to the bridge body 1 using this special suspension vehicle 31, it is also possible to attach it using a normal tow truck.

[Effects of the Invention] As is clear from the detailed description above, the present invention exhibits the following excellent effects.

(1) Install a rail clamp device on the moving rail,
In addition, by providing a work girder clamp device that is movable along the moving rail, the rail clamp device and the work girder clamp device can be appropriately engaged and disengaged from the longitudinal girder.
The work girder can be moved along the bridge body, allowing maintenance to be performed on the entire underside of the bridge body.

(2) Maintenance work will be carried out along the underside of the bridge body, so traffic on the bridge will not be obstructed during maintenance work.

(3) Since it is mainly composed of working girders, moving rails, etc., its weight is small, and the transportation load can be kept to a light and minimal size.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the bridge maintenance device of the present invention, and shows a front view as seen from a cross section of the bridge body, and a second embodiment of the bridge maintenance device of the present invention.
The figure is a side view of Fig. 1, Fig. 3 is an enlarged view of the main part of Fig. 2, Fig. 4 is a view taken along the - line in Fig. 3, and Fig. 5 is a side view of Fig. 1.
Figures 6 and 7 are diagrams illustrating the running states of the moving rail and the working girder in the bridge maintenance device of the present invention, Figures 8, 9, 10, and 1, respectively.
Figure 1 is a diagram explaining the installation state when the bridge maintenance device of the present invention is installed on a bridge body, respectively.
The figure is a side view of FIG. 11. In the figure, 1 is the bridge body, 3 is the longitudinal girder, 4 is the moving rail,
6 is a rail clamp device, 8 is a work girder, and 12 is a work girder clamp device.

Claims (1)

[Claims] 1 A pair of moving rails arranged along longitudinal parallel girders on the lower surface of the bridge body, and rail clamps provided at the front and rear ends of the moving rails to releasably suspend the moving rails from the longitudinal girders. a device, a working girder which is movably spanned along the moving rail and is provided to be able to rise and fall with respect to the moving rail, and a working girder clamp device which suspends the working girder in a detachable manner from the longitudinal girder. and a moving cylinder means connected on one side to the moving rail and on the other side to the working girder side for moving the moving rail along or relative to the moving rail. Characteristic bridge maintenance equipment.