JPH0380925B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a bridge maintenance device, and is particularly used to repair rust on steel materials, peeling of paint, cracks on concrete slabs, etc. on the lower surface of road bridges or elevated roads. Regarding bridge maintenance equipment that can inspect and repair bridges.

Conventional technology Conventionally, this type of bridge maintenance equipment has been known to inspect the underside of a bridge while an inspection table moves along a rail installed on the underside of the bridge in the longitudinal direction of the bridge. There is. However, this bridge maintenance device cannot be moved across piers, has a complicated structure, and is difficult to remove, so it has the disadvantage that one device must be installed in advance between each pier.

In addition, an arm is extended below the side of the bridge from a vehicle stopped on the road on the bridge, and inspection is carried out using a work dragon or work scaffold attached to this arm.
Bridge maintenance equipment that performs repairs is known, but this equipment requires vehicles to stop on the road above the bridge, which obstructs traffic and prevents detours from being taken, such as on expressways. has many problems.

Furthermore, a bridge maintenance device is being considered in which a base is provided on the bridge railing, an arm is extended from this base to the lower side of the bridge, and maintenance is performed on a workbench installed on this arm. Because of its weak strength, it is actually not possible to install the above-mentioned device as is on existing railings, and it requires significant reinforcement. There is a problem in that the device cannot be installed in the location where it is provided.

The present invention has been devised in view of the above-mentioned problems and to effectively solve them.

Purpose of the invention The purpose of the present invention is to
To provide a bridge maintenance device with a simple structure that can be attached to a flange part of a bridge girder and can easily perform maintenance such as inspection and repair over the entire lower surface of the bridge, and does not obstruct traffic on the bridge.

Structure of the Invention In order to achieve the above object, the present invention provides a plurality of workbenches having a clamping device that can be freely fitted and removed from a flange portion of a bridge girder, each of which is provided with a rotatable arm, and the other end of each of the arms is They are connected to each other so that they can rotate freely.

Embodiments Hereinafter, a bridge maintenance device according to the present invention will be explained based on the drawings.

Figures 1 to 3 show an embodiment of the present invention. In the figures, reference numerals 1 and 1' are workbenches, and these workbenches 1 and 1' are used for inspection and repair by workers riding on them. They can also be equipped with cameras, lights, automatic painting machines, etc. to perform maintenance unattended. And each workbench 1,
1' is provided with clamp devices 4, 4', which are removably fitted onto a flange portion 3a formed at the lower end of the bridge girder 3 of the bridge 2, respectively. Also,
Vertical shafts 5 provided at the bottom of each workbench 1, 1',
5' is provided with a pair of arms 6, 6', which are rotatable, respectively, and between these vertical shafts 5, 5' and the arms 6, 6', there is a rotating shaft consisting of a motor and gears. A drive (not shown) is provided. The other ends of each arm 6, 6' are connected to each other via a vertical shaft 6a', and are turned by a turning drive device (not shown) consisting of a motor and gears.

The elevating mechanism 7 of the clamp device 4 is fixed to the workbench 1, and is made of a cylinder or the like. A telescopic mechanism 8 such as a cylinder is attached to the upper end of the elevating mechanism 7, and the telescopic mechanism 8 is moved up and down by the elevating mechanism 7. At the tips of the rods 8a, 8b of the telescoping mechanism 8, there are rotatable clamp arms 9a, 9b.
is attached, and this clamp arm 9a,
9b is adapted to move in the left and right direction in FIG.
The cylinders 11a and 11b provided between the hooks 10a and 10b at the tip of the holder allow the holder to rotate in a vertical plane. Further, on the lower inner surface of the hooks 10a, 10b of the clamp arms 9a, 9b, movers 12a, 1 movable in the vertical direction are provided.
2b is provided, and each movable element 12a, 12b
is raised by a movable element drive device (not shown) such as a cylinder to sandwich the flange portion 3a of the bridge girder 3 between each hook 10a, 10b. Note that the clamp device 4' has the same configuration as the clamp device 4, so a description thereof will be omitted. Also, 1
3 is a pier of the bridge 2, and 14 is a deck slab supported by the bridge girder 3.

Next, the operation of the bridge maintenance device configured as described above will be explained.

First, when installing the bridge maintenance device according to the present invention on the bridge 2, the bridge maintenance device is lowered along the side surface of the bridge 2, and at least one of the clamp devices 4, 4' of each workbench 1, 1' is One end is attached to the flange portion 3a of the bridge girder 3. To explain this procedure when installing the clamp device 4, the clamp device 4 is attached to the bridge girder 3 that you want to install.
After moving the bridge maintenance device so that it is below the flange portion 3a of do. and,
The cylinders 11a and 11b are driven to vertically erect the clamp arms 9a and 9b, and the lifting mechanism 7
, the clamp arms 9a and 9b are attached to the bridge girder 3.
The telescopic mechanism 8 is raised until it reaches both outside sides of the lower flange portion 3a. Next, the telescopic mechanism 8 is driven to retract the rods 8a, 8b, and the hooks 10a, 10b of the clamp arms 9a, 9b are fitted into the flange portions 3a, and then the movers 12a, 12b are moved.
by raising the flange portion 3a to the hooks 10a,
10b and the movers 12a, 12b. In this way, the bridge maintenance device is firmly attached to the bridge girder 3.

In addition, when inspecting or repairing the lower surface of the bridge 2, one of the clamp devices 4 and 4' should be connected to the bridge girder.
The arms 6 and 6' are rotated by driving the swing drive device while the bridge girder 3 is fixed to the bridge girder 3.
Maintenance such as inspection and repair of the lower surface of the bridge 2 can be performed by moving the workbench 1 or 1' that is not fixed to the bridge. Then, with one of the clamp devices 4 and 4' fixed to the bridge girder 3,
When the workbench 1 or 1' that is not fixed to the bridge girder 3 is moved to complete maintenance within the scope of inspection and repair, the fixed position of the bridge maintenance device is moved. In this moving operation, assuming that the clamp device that is not currently fixed to the bridge girder 3 is the clamp device 4, the clamp device 4 is first moved to a predetermined position on the bridge girder 3 (the position where the clamp device 4 is desired to be fixed). Next, the cylinder 11a,
11b to vertically raise the clamp arms 9a, 9b, and at the same time drive the elevating mechanism 7 to raise the telescopic mechanism 8 until the clamp arms 9a, 9b are on both outsides of the lower flange portion 3a of the bridge girder 3. let Then, by driving the telescopic mechanism 8, the rod 8
a, 8b, and after fitting the hooks 10a, 10b of the clamp arms 9a, 9b into the flange portion 3a, the movers 12a, 12b are raised,
The clamp device 4 is fixed to the bridge girder 3 by inserting the flange portion 3a between the hooks 10a, 10b and the movers 12a, 12b. Next, until now, bridge girder 3
Mover 12 of clamp device 4' which was fixed to
a, 12b and hooks 10a, 10b.
After releasing the flange portion 3a which was clamped between the movable elements 12a and 12b, the expansion mechanism 8' is driven to extend the rods 8a and 8b, and the clamp arm 9a' is removed from the flange portion 3a of the bridge girder 3. , 9b'. Then, after driving the lifting device 7' to lower the clamp arms 9a' and 9b' and completely separating the clamp device 4' from the bridge girder 3, the swing drive device is driven to lower the clamp arms 9a' and 9b'. , 6' are rotated to move the workbench 1'. By repeating this operation, maintenance such as inspection and repair can be performed on the entire lower surface of the bridge 2.

When using this device to jump over bridge piers, follow the steps below. (See Figure 4) Release the clamp on workbench B and rotate it 90 degrees around workbench A.

Workbench B is moved horizontally to the other side of the pier 13.

Place work platform B on the nearest bridge girder 3 on the other side of the pier 13.
Clamp to the flange portion 3a of.

Release the clamp on workbench A and move it to the outside of bridge 2.

The work platform A is moved horizontally along the bridge 2 to the other side of the pier 13.

After rotating 90 degrees from workbench A to workbench B, it is clamped to the flange portion 3a of the bridge girder 3.

In this embodiment, it is desirable that at least one of the two clamp devices 4, 4' be provided with an interlock mechanism to prevent it from coming off due to erroneous operation during maintenance work. Further, in this embodiment, two workbenches 1 and 1' are provided, but only one workbench may be used, and the position thereof is not limited to only the ends of the arms 6 and 6'. Furthermore, instead of the workbenches 1, 1', only inspection equipment such as cameras and lights may be installed and remotely operated.

As explained above, according to the present invention, the following excellent effects are exhibited.

Effects of the Invention (1) By attaching and detaching a plurality of clamp devices to the flange portion of the bridge girder, inspection and repair can be carried out over the entire lower surface of the bridge, regardless of obstacles such as bridge piers.

(2) Since it is attached to the flange of the bridge girder, it will not obstruct traffic on the bridge.

(3) Since the arms are rotatably attached to multiple clamp devices and the arms are rotatably connected, the structure is simple, and once installed on the bridge girder, it can be moved and inspected. Workability improves because it can be repaired.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of the present invention, in which Figure 1 is a perspective view of a bridge seen diagonally from below, Figure 2 is a sectional view, Figure 3 is a front view of the clamp device, FIG. 4 is an explanatory diagram showing the procedure when the device according to the present invention jumps over a bridge pier. 1, 1', A, B...Workbench, 3...Bridge girder, 3a...
Flange part, 4, 4'...clamp device, 6, 6'...
arm.

Claims (1)

[Claims] 1. A bridge characterized in that a plurality of work platforms each having a clamp device that can be freely fitted and removed from a flange portion of a bridge girder is provided with an arm that is rotatable, and the other ends of the arms are rotatably connected to each other. maintenance equipment.