JPH0111785Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a bridge maintenance device, and is particularly concerned with rusting of steel materials, peeling of paint, or concrete slabs on the lower surface of road bridges or elevated roads. This invention relates to a bridge maintenance device that can inspect and repair cracks, etc.

[Prior art]

BACKGROUND ART Conventionally, this type of bridge maintenance apparatus is 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. 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 gondola or work scaffold installed on 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 invention]

The purpose of this invention is that even if there are obstacles such as bridge piers,
A bridge maintenance device with a simple structure that can be installed on the flange of the main girder of a road bridge or elevated road to easily inspect and repair the entire underside of the bridge, and does not obstruct traffic on the bridge. It is about providing.

[Structure of the idea]

In order to achieve such an objective, the present invention provides a plurality of work platforms that are removably attached to the flange of the main girder on the underside of the bridge via clamping devices, each of which is provided with a boom capable of horizontal rotation and elevation. The booms are rotatably connected in a vertical plane via a connecting means.

〔Example〕

Hereinafter, one embodiment of the bridge maintenance device according to the present invention will be described based on the drawings.

In Figures 1 to 4, 1 and 1' are workbenches, and these workbenches 1 and 1' are used by workers to carry out inspections and repairs, or to carry cameras, lights, automatic painting machines, etc. It is equipped with a system that allows maintenance to be carried out unattended. Each workbench 1, 1' has a clamping device 4,
4' are provided, and these clamping devices 4,
Each of the work platforms 1, 1' is attached to a flange portion 3a formed at the lower end of the main girder 3 on the lower surface of the bridge 2 via 4'. In addition, each workbench 1,
Horizontal turning tables 5 and 5' are provided at the bottom of each work table 1' so as to be horizontally rotatable, and a turning drive device 6 is provided between each work table 1 and 1' and the horizontal turning table 5 and 5'. , 6' are provided. Connecting members 7, 7' are fixed to the lower surface of each horizontal swivel table 5, 5', respectively. These connecting members 7,
Booms 9, 9' are connected to the booms 9, 9' through horizontal shafts 8, 8', respectively, and cylinders are provided between the intermediate portions of the booms 9, 9' and the connecting members 7, 7'. By means of devices 10, 10' each boom 9,
9' is adapted to rotate around each horizontal axis 8, 8'. Furthermore, each boom 9,
The tips of the booms 9' are connected to each other via a horizontal shaft 11, and a cylinder device 12 provided between the intermediate portion of the boom 9 and the tip of the boom 9' allows the cylinder to move around the horizontal axis 11. The booms 9, 9' are designed to rotate.

The clamp device 4 is fixed via two mounting members 13 erected on the workbench 1, and a support frame 14 is mounted to the upper end of the mounting members 13. Further, a pair of clamp arms 15 and 16 are arranged on the upper surface of the support frame 14 with their hook portions 15a and 16a facing each other, and each clamp arm 15 and 16 has a
It is supported by a pair of guide rails 17, 17 and a slider 18 so as to be slidable in the left-right direction in FIG. These clamp arms 15,1
Screws 19 and 20 are screwed into each of the screws 6, and the screw threads of the screws 19 and 20 are installed in opposite directions. And each screw 19, 2
0 is a rotating shaft 21a, 2 protruding from both ends of a rotational drive mechanism 21 composed of a motor and a speed reducer.
1b via joints 22 and 23, respectively, and the distance between the clamp arms 15 and 16 can be expanded or contracted by operating the rotational drive mechanism 21.

As shown in FIG. 6, the swing drive device 6 includes:
A motor 24 is installed on the workbench 1, and a gear 25 is attached to the rotating shaft 24a of the motor 24.
is configured to mesh with a gear 26 attached to the outer periphery of the horizontal swivel table 5. By driving the motor 24, the horizontal swivel base 5 is rotated horizontally with respect to the workbench 1. Note that the clamp device 4' and the swing drive device 6' have the same configuration as the clamp device 4 and the swing drive device 6, respectively, so a description thereof will be omitted. Also, 27
is a pier of the bridge 2, 28 is a deck supported by the main girder 3, 29 is a crane for suspending the bridge maintenance device X according to the present invention, and 30 is the work platform 1 or 1' of the bridge maintenance device X. It is a support stand to keep it fixed.

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

First, when installing the bridge maintenance device X according to the present invention on the bridge 2, as shown in FIG. Alternatively, by using the support platform 30 installed below the bridge 2, the clamping device 4 of each work platform 1, 1',
4' is attached to the flange portion 3a of the main girder 3. To explain this procedure for the case where the clamp device 4 is attached, the suspension section 29a of the crane 29 or the support base 3 is attached in advance.
0 is formed into a flange shape like the main girder 3, and the rotation drive mechanism 21' is actuated to the hanging parts 29a or the mounting parts 30a to attach the clamp arms 15', 16'. The clamping device 4' of the workbench 1' is attached by expanding and contracting the clamping device 4'. Next, the workbench 1 is rotated by the swing drive device 6, and the support frame 14 of the clamp device 4 is rotated.
are perpendicular to the length direction of the main girder 3, and the rotational drive mechanism 21 is operated to rotate the clamp arms 15,
16 is widened to be larger than the width of the flange portion 3a of the main girder 3. Then, by driving the cylinder devices 10, 10', 12 and moving the booms 9, 9', the clamp device 4 is moved to the main girder 3.
The clamp arms 15 and 16 are positioned below the flange portion 3a, and the clamp arms 15 and 16 are positioned on both outer sides of the flange portion 3a. Subsequently, the rotation drive mechanism 21 is operated to reduce the distance between the clamp arms 15 and 16, and the hook portions 15 of the clamp arms 15 and 16 are
The flange portion 3a is fitted into the inside of the flange portion 3a and 16a. Furthermore, the rotation drive mechanism 21' of the clamping device 4' is operated to widen the gap between the clamp arms 15' and 16', and the clamping device 4' is attached to the hanging part 29a of the crane 29 or the support base 30. Part 30
Release from a. In this way, the bridge maintenance device X is firmly attached to the main girder 3.

When inspecting or repairing the lower surface of the bridge 2, one of the clamp devices 4, 4' is fixed to the main girder 3, and the swing drive devices 6, 6', cylinder devices 10, 10', 12, the booms 9 and 9' are rotated, and the work platform 1 or 1' that is not fixed to the main girder 3 is moved while being prevented from tilting, and the bridge 2 is moved. All you have to do is perform maintenance on the bottom part. Then, with one of the clamp devices 4 and 4' fixed to the main girder 3, the work platform 1 or 1' that is not fixed to the main girder 3 is moved to complete maintenance to the extent that it can be inspected and repaired. Then, move the fixed position of the bridge maintenance device X. This moving work is
Now, assuming that the clamp device that is not fixed to the main girder 3 is the clamp device 4, first move the clamp device 4 to a predetermined position on the main girder 3 (the position where you want to fix the clamp device 4), and then drive the The device 6 and the rotation drive mechanism 21 are operated to fix the clamp device 4 to the main girder 3 as described above. Next, the clamp arms 15', 16' of the clamp device 4', which have been fixed to the main girder 3, are separated from the flange portion 3a of the main girder 3 by the rotation drive mechanism 21', and the rotation drive devices 6, 6 ' and by driving the cylinder devices 10, 10', 12,
The work platform 1' is moved by turning and rotating the booms 9, 9'. By repeating this operation, the entire lower surface of the bridge 2 is covered, especially the flange portion 3a.
The lower surface of the floor slab 28 between the bridges, the pier 27, etc. can be easily inspected and repaired.

When the bridge maintenance device X moves to a location where the bridge pier 27 is located, the cylinder device 1
0, 10', and 12, the unfixed work platform 1' is lowered to a height that allows it to pass between the inverted U-shaped piers 27. Next, the swing drive device 6 is activated to swing the workbench 1' around the workbench 1 and pass between the piers 27.
move it to the other side. And the swing drive device 6, 6'
By driving the cylinder devices 10, 10', and 12 and operating the rotary drive mechanism 21', the workbench 1' is clamped to the flange portion 3a of the main girder 3 on the opposite side of the pier 27. continue,
Release the clamp on the workbench 1 and move the workbench 1 through the bridge piers 27 to the workbench 1' side. In this way, the bridge maintenance device X according to the present invention can continue maintenance beyond the bridge pier 27.

In this embodiment, the horizontal shaft 11 is used as a means for connecting the tips of the booms 9 and 9'.
However, the tips of the booms 9, 9' are rotatably connected to each other via one or more booms to further increase the degree of freedom, and the work platforms 1, 1' can be The movement may be made smoother. Moreover, if these booms are configured to be extendable and retractable, they can more easily pass between the bridges 27. Further, the power supply device for driving the electric system or hydraulic system of the bridge maintenance device X according to the present invention may be installed above or below the bridge 2, and depending on the case, the
It may be installed above. Furthermore, 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, as shown in FIG. 7, vertical lines 31 and 3 passing through the horizontal axes 8 and 8' are formed on the connecting members 7 and 7'.
Another horizontal shaft 32 and 32' is provided on 1';
Vertical distance between horizontal axes 8 and 32 and horizontal axes 8' and 3
Another boom 33 and 33' having the same length as the booms 9 and 9' is connected to the horizontal shafts 32 and 32', and the other ends are connected to the horizontal shaft 3.
5, and the horizontal axes 11 and 35 are connected by a connecting member 36 such that the vertical distance between them is equal to the vertical distance between the horizontal axes 8 and 32 and 8' and 32', thereby forming a so-called parallelogram. By configuring a link, the postures of the two work platforms 1 and 1' are always parallel to each other, so even if a failure of the cylinder device 10 or 10' occurs, one of the work platforms will be tilted and will not be able to work. You can also make sure that it does not cause any problems. In this case, the cylinder device 12 in FIG.
There is no need to provide it.

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

[Effect of idea]

(1) Multiple work platforms are removably installed on the flange of the main girder on the underside of the bridge, so once they are attached to the main girder, they can be moved to inspect and repair the entire underside of the bridge.

(2) The structure is simple because the booms are installed on multiple work platforms so that they can rotate horizontally and vertically, and the arms are connected to each other via connecting means so that they can rotate freely in the vertical plane. , and if there are obstacles such as piers, maintenance can be continued by passing between the piers, improving work efficiency.

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

[Brief explanation of the drawing]

Figures 1 to 6 show an embodiment of the present invention, with Figure 1 being a sectional view showing the state in which the bridge maintenance device according to the present invention is attached to a bridge, and Figure 2 showing the state during maintenance. A sectional view, FIG. 3 is a side view showing the state of passing between the piers, FIG. 4 is a front view of the clamping device, and FIG. 5 is taken along V-V in FIG. 4.
Linear view, Figure 6 is a side view of the swing drive device, Figure 7 is a side view of the swing drive device.
The figure shows another embodiment of the present invention, and is a sectional view showing the state during maintenance. 1, 1'...Workbench, 2...Bridge, 3...Main girder,
4, 4'...clamp device, 9,9'...boom,
11...Horizontal axis, X...Bridge maintenance device,
3a...flange part.

Claims (1)

[Scope of utility model registration request] Multiple work platforms are removably installed on the flange of the main girder on the underside of the bridge via clamping devices.
A bridge maintenance device characterized in that each boom is provided so as to be horizontally rotatable and vertically movable, and the booms are connected to each other via a connecting means so as to be rotatable in a vertical plane.