JPH0472943B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bridge maintenance device for steel bridges, etc., and particularly to a bridge maintenance device that can be easily attached to a bridge.

[Conventional technology] Regarding the current state of bridge maintenance, in recent years equipment for both inspection and painting repair has begun to appear for newly built large steel bridges, but most existing bridges do not have these equipments. few.

This bridge maintenance equipment is used, for example, to perform periodic inspections of bridges, to inspect bridges after earthquakes or typhoons, or to repair and repaint bridges.

[Problems to be Solved by the Invention] Conventionally, this bridge maintenance device does not cause any problems when installed together with the construction of a new bridge, but various problems occur when the maintenance device is installed on an existing bridge.

In other words, conventionally, various types of maintenance have been performed by running a truck crane on the roadway of a bridge, hoisting a work scaffold with the truck crane, and moving the work scaffold along the underside of the bridge body. , Truck cranes occupy the roadway of the bridge, which obstructs road traffic for a long time, which is not compatible with current traffic conditions.

In addition, work scaffolds have been suspended using bridge girders, or work scaffolds have been assembled from the ground below towards the bridge body, but these methods require a long time to set up the scaffolding and are difficult to install at high places. Special work is required and work safety is a problem.

The present invention was made in consideration of the above circumstances, and
To provide a bridge maintenance device that can be easily attached to a bridge and can maintain the entire bottom of a bridge body between piers.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a maintenance device for the bottom of a bridge supported between piers, in which a fixing hardware is attached to one of the piers, and the bottom of the bridge is A working arm located nearby and having a free end extending horizontally along the bottom of the bridge body at least as far as the local piers is rotatably provided on the fixed hardware. It is divided into three parts in the direction, and each divided arm is connected to each other so as to be able to rotate horizontally.

[Function] According to the above configuration, the bridge can be installed by simply attaching the fixing hardware, which is the base end of the working arm, to the bridge body, and each divided arm can be rotated horizontally to bend or extend as appropriate. This allows maintenance to be carried out over almost the entire area near the bottom of the bridge body between the piers.

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

FIG. 1 shows a perspective view of the bridge maintenance device of the present invention attached to a bridge body, and in the figure,
1 is composed of a bridge body, a floor plate 2, and girders 3 such as beams that support the floor plate 2, and the girders 3 are supported by piers 4 provided at appropriate intervals to form a bridge. Working arm 5 on this pier 4
will be provided.

This working arm 5 has a fixed hardware 6 at its base end.
is fixed to the pier 4 by welding or bolting,
The free end portion of the other end is formed to have a length extending to the other pier 4, as shown in FIGS. 2 and 3. Further, the working arm 5 from the base end to the free end is divided into three arms 7, 8, and 9 as shown. The first arm 7 is horizontally pivotally connected to the fixed hardware 6 by a rotating hinge 10, and a second arm 8 is horizontally pivotally connected to the tip of the first arm 7 by a rotating hinge 11. A third arm 9 is connected to the tip of the third arm 9 by a rotation hinge 12 so as to be horizontally pivotable.

Although not shown, a robot for automatically painting the tip of the third arm 9 or the second arm 8 and the first arm 7 as appropriate, or an inspection vehicle or a workbench for inspecting the paint is installed. It is being

The work arm 5 is installed by, for example, suspending the work arm 5 from the bridge body 1 using a crane or the like (not shown) with each arm 7, 8, and 9 bent and contracted as shown in FIG. The hardware 6 is attached to the pier 4 by bolting or welding. In this case, as shown in FIG. 1, it is preferable to attach a mounting bracket 13 to the pier 4 in advance for attaching the fixed hardware 6 thereto.

Also, when attaching the work arm 5 to the pier 4,
It may also be installed by lifting it up from the ground surface of the pier 4 with a crane or the like.

Also, instead of attaching the entire working arm 5 on the bridge body 1 or from the ground, only the fixed hardware 6 is attached to the pier 4, and the first arm 7 is attached to the attached fixed hardware 6, and the second arm 8 and the third arm are attached in sequence. Arm 9
You may also assemble the

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

When performing maintenance on the lower surface of the bridge body 1 on the proximal end side of the fixed hardware 6 side of the working arm 5, each arm 7, 8, and 9 is turned and bent as shown in FIG. Perform appropriate maintenance in this state. Thereafter, maintenance of the lower surface of the bridge body 1 on the other pier 4 side is performed by appropriately rotating and extending each of the arms 7, 8, and 9.

By horizontally pivoting each of the arms 7, 8, and 9 as described above, maintenance can be performed on the entire lower surface of the bridge body 1 between the four piers, that is, in one span.

Next, when performing maintenance on the bridge body 1 in another span, the entire working arm 5 or, as appropriate, is removed from the third arm 9 and attached to the next pier 4, and maintenance is performed on the bridge body 1 in that span. . In this case, by attaching the working arms 5 to the front and back sides of one pier 4 to which the working arms 5 are attached, maintenance of two spans can be performed without moving the working arms 5 much.

In addition, the work arm 5 is always installed without being removed, and by folding each arm 7, 8, and 9 and storing them along the surface of the pier 4, the work arm 5 can be easily installed when not in use. It does not become sticky, and when used, it can be stretched and maintenance can be performed immediately.

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

(1) The base end of the working arm is attached to the pier, and the other end is the free end, so the installation time to the pier is shortened.
It does not obstruct traffic on the bridge during installation.

(2) By dividing the working arm into three arms and connecting each arm so that they can rotate horizontally, maintenance can be performed on the entire underside of the bridge body.

(3) Since there is only a working arm, the transportation load can be kept to a minimum and lightweight, and there is less load on the bridge after installation.

(4) A painting robot, inspection robot, etc. is mounted on each divided arm, and full automation is possible by rotating with a rotating hinge and controlling the robot remotely.

(5) Each arm is bendable and pivotable, making it easy to move on the underside of the bridge body.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the bridge maintenance device according to the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a front view of Fig. 2, and Fig. 4 is a bridge of the present invention. FIG. 3 is a diagram showing a state in which the work arm of the maintenance device is folded. In the figure, 1 is the bridge body, 4 is the bridge pier, 5 is the work arm,
Reference numeral 6 represents a fixed metal fitting at the base end, and 7, 8, and 9 represent arms.

Claims (1)

[Claims] 1. In a maintenance device for the bottom of a bridge body supported between piers, fixing hardware to one of the piers,
A working arm is provided near the bottom of the bridge body, and the fixed hardware is rotatably provided with a working arm whose free end extends horizontally along the bottom of the bridge body to at least the other pier. A bridge maintenance device characterized in that it is divided into three parts in the longitudinal direction, and each divided arm is connected to each other so as to be horizontally swingable.