JPS61122367A - Bridge maintenance apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

[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, various inspections are required for safety management on steel bridges, but in many cases the upper surface is the road.
If inspection of the underside of the bridge body is performed on the bridge body, it may obstruct traffic and pose 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 constructing scaffolding 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. Work 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 is carried out at height, which poses a safety problem, and the work scaffolds must be attached to the entire surface of the bridge body for one span. In addition, the installation and removal of scaffolding materials is problematic because it takes a long time, and the scaffolding materials have many parts and tend to be expensive.

[Objective of the Invention 1] The present invention has been made in consideration of the above circumstances, and provides 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 fence body to perform maintenance on the entire surface. The purpose is to provide

Large [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 clamping device for releasably suspending the movable rail on the longitudinal girder;
A working girder which is movably spanned along the moving rail and which is movable up and down with respect to the moving rail, and a working girder crane 1 which releasably suspends the working girder from the longitudinal girder.
and a moving cylinder means connected on one side to the moving rail and on the other hand to said working girder side for moving the working girder along or relative to the moving rail. By moving this work girder relative to the movable rail, maintenance can be performed on the entire span of the bridge body, and when it is installed on a bridge, the movable rail and work girder can be suspended from the bridge using a dedicated suspension vehicle, tow truck, etc. After being lowered, the clamp device can be easily attached to the longitudinal girder on the underside of the bridge body, so it can be installed in a short time and hardly obstructs traffic on the bridge.

[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 FIGS. 1 and 2, reference numeral 1 denotes a bridge body such as a steel bridge, which has a floor plate 2 on its upper part and a longitudinal girder 3 such as an I-beam that supports the floor plate 2 on its lower part. 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. This moving rail 4 is provided with a rail clamping device 6 via a rail suspension beam 5 at its front and rear ends, and the moving rail 4 is detachably suspended from the vertical beams 3a and 3b by this clamping 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 1o for supporting rollers 9 sliding on the moving rail 4 are provided at the upper end of the extendable hanger 7 so as to be located on both sides of the moving 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 dovetail-shaped clamp fittings 14 which are slidably provided on clamp fitting pressers 13 provided along the suspension beams 5 and 11, respectively, and which are opposed to each other. is the longitudinal girder 3a (or 3k))
By moving in the direction of clamping or moving away from the flange part 15, it can be brought into clamping engagement with the flange part 15, or can be separated from the flange part 15.

The moving rail 4 includes the upper end of the telescopic hanger 7 of the work girder 8, and support fittings 10 provided on both sides of the upper end of the telescopic hanger 7.
It is provided so that it can freely slide between the working suspension beam 11 provided on the support metal fitting 10, and as shown in FIG. 3, the front and rear telescopic hangers 7a, 7b1. : Provided support fitting 10a.

A cylinder portion 19 of a movable cylinder means 18 such as a hydraulic cylinder is attached between the movable cylinder means 10b, and the tip of a rod portion 20 of the movable cylinder means 18 is attached to the movable rail 4. This moving cylinder means 18 is for moving the telescopic hanger 7 (working method 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 method 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 contracted, 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 mechanism 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. As shown in FIG. 1, an auxiliary work method 21 can freely appear and retract from one end of the work method 8, that is, from the end side of the bridge body 1 at approximately the center side (right end).
The end of the auxiliary working girder 21 can extend below the bridge body 1 on the right side as seen in the figure. A work table 22 that can be raised and lowered is provided on the auxiliary work 21 so as to be movable along the auxiliary work 21. That is, a running rail 23 is provided on the auxiliary work 21, and the cart 2 runs along the running rail 23.
A workbench 22 is provided on the table 4. As shown in FIG. 1, this workbench 22 can rise to the side of the longitudinal girder 3, and can freely move along the auxiliary workpiece 21 even when the auxiliary workpiece 21 is housed in the workpiece 8. It can be raised and lowered, and the bridge body 1
It is configured so that it can be traversed in the width direction. In addition, an insertion hole 25 is provided at the rear end of the auxiliary work device 21 for inserting a suspension rod of a suspension vehicle to be described later.

Next, the present invention will be explained in detail.

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, auxiliary work technique 21 of work technique 8
The workbench 22 is expanded and contracted relative to the workbench 8, and the workbench 22 is adjusted accordingly.
Maintenance of the fence body 1 in the width direction can be performed by moving and raising and lowering the fence body 1 in the working technique 8.

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

During normal maintenance, the rail clamp device 6 of the movable rail 4 and the work girder clamp device 12 of the work technique 8 are both in a state where they clamp the flange portions 15 of the longitudinal girders 3a and 3b, but when they are not working on the movable rail 4. When moving the pipe 8, the working girder clamp device 12 at the upper end of the telescopic hanger 7 is released to free it from the flange portions 15 of the vertical girders 3a, 3b. In this state, by appropriately expanding and contracting the rod portion 20 of the moving cylinder means 18, the roller 9 supported by the support fitting 10 at the upper end of the extendable hanger 7 slides along the moving rail 4, as shown in FIG. The working tool 8 runs back and forth with respect to the moving rail 4, stops at an appropriate position, clamps the flange portion 15 with its working girder clamp device 12, and performs maintenance on the work bench 22 as described above.

Next, as shown in FIG. 6, when the workpiece 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 is used to clamp the flanges of the longitudinal girders 3a and 3b. 15 in a sandwiched state, move the moving rail 4
The rail clamp device 6 at the front and rear ends of the flange portion 1
Move it away from 5 to make it free. If the rod portion 20 of the moving cylinder means 18 is contracted in this state, the moving rail 4 will move forward in the running direction as shown in FIG. After the movement of the moving rail 4, 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 method 8 is moved to the moving rail 4 in the same manner as described above, with the working girder clamp device 12 of the working method 8 free. move it along.

In this way, it becomes possible to perform maintenance on the entire surface of the bridge body 1 by appropriately moving the work tool 8 along 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, and the process may be performed automatically 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 FIG. 8, the work girder 8 and the like are placed on a long body truck 30 and transported to a predetermined location on the bridge body 1. In this case, the auxiliary work girder 21 is housed in the work girder 8, and the extendable hanger 7 and the work platform 22 are also kept in a retracted state. At the rear of this truck 30, a dedicated 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 3 of the suspension-only vehicle 31 is
2 and connect the wire 33 from the upper end of the rod 32.
After unloading the work girder 8 from the hoisting truck 30, the suspension rod 32 is made vertical as shown in FIG. When the rod 32 is rotated 90 degrees, the auxiliary work girder 21 is automatically locked to the rod 32. In this state, the telescopic hanger 71 of the work girder 8
Yai I! 8ti yo■2゜.

Next, as shown in FIGS. 11 and 12, this suspension rod 3
2, lift the working girder 8 and at the same time swing its suspension rod 32 to the outside of the bridge body 1. From the side, lift the working girder 8 along the bridge body 1 to below the bridge body 1. unload. Thereafter, as shown in FIG.
After turning the working girder 8 so that it follows the width direction of the lower surface of the bridge body 1, the rail clamping device 6 and the working girder clamping device 12 clamp the flange portions 15 of the longitudinal girders 3a and 3b and move them. The rail 4 and the working girder 8 are the vertical girder 3a.

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 then the rod 32 If you move it upward, the working girder 8
installation is completed.

This installation by the suspension vehicle 31 requires only 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.

In addition to attaching the working girder 8 to the bridge body 1 using this special suspension vehicle 31, it is of course possible to attach the working girder 8 to the bridge body 1 using an ordinary 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 movable rail, the rail clamp device and the work girder clamp device can be appropriately engaged and disengaged from the longitudinal girder, and the work girder can be moved along the bridge body. The work girder can be moved by moving the bridge, and maintenance can be performed on the entire underside of the bridge body.

(2) Maintenance work is carried out along the underside of the bridge body, so maintenance work part 8! Do not obstruct traffic on the beam.

(3) Since it is mainly composed of working girders, moving rails, etc., there is less heavy surroundings and the amount of cargo to be transported can be kept to a minimum.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the bridge maintenance device of the present invention; Fig. 2 is a front view seen from a cross section of the fence body, Fig. 2 is a side view of Fig. 1, and Fig. 3 is an enlarged view of the main part of Fig. 2. 4 is a view taken along the line IV-rV in FIG. 3, and FIGS. 5, 6, and 7 are diagrams illustrating the running states of the moving rail and the working girder, respectively, in the bridge maintenance device of the present invention. , Figure 8, Figure 9, Figure 10
Figures 11 and 11 are diagrams for explaining the mounting state when the bridge maintenance device of the present invention is attached to a bridge body, respectively, and Fig. 12 is a side view of Fig. 11. In the figure, 1 is a bridge body, 3 is a longitudinal girder, 4 is a moving rail, 6 is a rail clamp device, 8 is a work girder, and 12 is a work girder clamp device. Patent applicant Nobuo Kinutani Director-General, Kanto Regional Construction Bureau, Ministry of Construction Patent attorney representing Ishikawajima-Harima Heavy Industries Co., Ltd. Figure 1 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 8

Claims (1)

[Claims] A pair of moving rails arranged along parallel longitudinal girders on the lower surface of the bridge body, and a rail clamp device provided at the front and rear ends of the moving rails to releasably suspend the moving rails from the longitudinal girders. a working girder which is movably spanned along the moving rail and which is movable up and down with respect to the moving rail; and a working girder clamp device which releasably suspends the working girder from the vertical girder. , characterized in that it comprises a moving cylinder means, one of which is connected to the moving rail and the other of which is connected to the working girder side, for moving the moving rail along or relative to the moving rail. Bridge maintenance equipment.