JPH0129925B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bridge inspection vehicle for long bridges, and more particularly to an inspection vehicle that runs on the underside and side surfaces of bridges and is capable of maintenance control not only on the outside of the bridge but also on the inside of the bridge.

In general, it is common knowledge that long bridges such as crossing bridges are equipped with bridge inspection vehicles for inspecting the condition of the bridge, painting the bridge, and repairing the structure (hereinafter referred to as maintenance work). .

Conventionally, there are bridge inspection vehicles such as those shown in FIGS. 1 and 2, for example.

Figure 1 shows an example of the Kanmon Bridge in Japan, where a roadway 2 is formed on the top of the bridge 1, and a bridge inspection vehicle 3 runs in the longitudinal direction of the bridge along a track 4 laid on the underside of the bridge 1. Mounted as possible.

Maintenance work on the bridge 1 is then performed from above the bridge inspection vehicle 3.

However, with this type of bridge inspection vehicle 3, bridge inspection vehicle 1
There was an inconvenience that maintenance work could only be carried out on the underside of the bridge, and the inside of the bridge could not be reached.

Therefore, maintenance work will be carried out on the interior and sides of Bridge 1 using temporary scaffolding.
There was a problem in that the work efficiency was significantly reduced and there was a danger to the workers in strong winds.

In Fig. 2, a roadway 2 is formed inside the bridge 1.The roadway 2 is used to carry out internal maintenance work of the bridge 1 with a road inspection vehicle 5. The inspection vehicle 3 similar to that shown in FIG. 1 is used.

With this, bridge 1 during maintenance work
However, since it is necessary to arrange for a road inspection vehicle 5, it has the disadvantage that it is not responsive, is troublesome, and is expensive.

This invention was made by focusing on these conventional problems, and includes an inspection vehicle that can travel on the underside and side surfaces of bridges, and a telescoping boom that can tilt and swivel and has a work cage at the tip. It is an object of the present invention to provide a bridge inspection vehicle that is movable in the height direction of the bridge via a lifter in the section, thereby exhibiting excellent workability and economic efficiency.

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 3, a long bridge 12 connecting lands 11A and 11B across a strait 10 has been constructed, and a bridge inspection vehicle 14 for performing maintenance work on a bridge 13 of this long bridge 12 is installed at a bridge tower section 15. ,15
A predetermined number (four in the figure) are installed at the inspection vehicle mooring positions provided on the bridge abutments 16, 16.

As shown in FIGS. 4 to 6, this bridge inspection vehicle 14 consists of side inspection vehicles 17, 17 disposed on both sides of the bridge 13 and a bottom inspection vehicle 18 disposed on the lower surface of the bridge 13. It consists of three inspection vehicles.

The side inspection vehicle 17 has a main body portion 17A formed in a substantially columnar shape, and its upper and lower portions protrude slightly from the upper and lower surfaces of the bridge 13, respectively.

Rails (tracks) 20A, 2 are installed on the top and side surfaces of the bridge 13 via running wheels 19A, 19B provided on the top and bottom sides of the main body 17A.
It is suspended so that it can run (self-propelled) in the longitudinal direction of the long bridge 12 along 0B.

In other words, the running wheels 19A provided at the top are drive wheels with built-in hydraulic motors, and the running wheels 19B provided at the bottom are so-called anti-sway wheels.

On the other hand, the main body 18A of the bottom inspection vehicle 18 is formed in the shape of a road box that is long in the width direction of the bridge 13, and both ends of the bottom inspection vehicle 18 are inserted into the lower part of the side inspection vehicle 17 to be freely connected. Similarly, the long span bridge 1
It is suspended so that it can run in the longitudinal direction of 2.

This lower inspection vehicle 18 is replaced by the side inspection vehicle 17.
The bridge 13 is connected by a ramp 22, which will be described later, so that workers transferred from the side inspection vehicle 17 can perform maintenance work on the lower surface of the bridge 13 from above the lower surface inspection vehicle 18.

The ramp 22 is further extended along the main body 17A of the side inspection vehicle 17 to the top, with a plurality of landings 22A arranged at predetermined intervals along the way.

Therefore, a worker or the like can easily board the side inspection vehicle 17 from the top surface (road) of the bridge 13 using a simple connecting bridge (not shown), and the worker or the like who has boarded the vehicle can easily access the landing 22A. via bridge 1
Maintenance work on the side part 3 can be performed.

The side inspection vehicle 17 is further provided with a retractable telescopic boom 23 for internal maintenance work of the bridge 13.

This telescopic boom 23 has a boom cylinder 2
The base end of 3A is the main body 17A of the side inspection vehicle 17.
As shown in FIG. 7, a bracket 25 protruding from a lifter 24, which is housed movably in the height direction of the bridge 13, is rotated horizontally via a cylinder 26 built into the bracket 25. A work cage 27 is provided at the tip of a boom 23B that is freely (swivelably) connected with a pin A and that extends and contracts with respect to the boom cylinder 23A.

Further, as shown in FIG. 8, the bracket 25 has a base end that is freely rotatable vertically via a cylinder 28 inside the lifter 24, and is attached to a pin B.
be combined.

Therefore, as the bracket 25 rotates, the telescopic boom 23 integrally connected thereto also rotates (tilts) in the vertical direction.

At this time, the work cage 27 attached to the tip of the telescopic boom 23 is always held horizontally by a hydraulic cylinder or the like according to the above-mentioned tilting operation.

And, while the telescopic boom 23 is in operation,
Through its own telescopic operation, the above-mentioned turning and tilting operations, and the vertical movement of the lifter 24, which will be described later,
The work cage 2 is installed over a predetermined area inside the bridge 13.
7 is set so that it can reach you.

On the other hand, when storing, after fixing the lifter 24 at a predetermined position above, the boom 23B is retracted and rotated, and then tilted via the bracket 25, so that the lifter 24 is folded short along the main body 17A. , are aligned in the traveling direction of the side inspection vehicle 17 as shown in FIG.

As shown in FIGS. 7 and 8, the lifter 24 is moved through guide rollers 30 located at the center of both sides and provided two above and below, and guide rollers 31 similarly provided at the four corners of both sides. , guide rails 32, 3 with the main body 17A of the side inspection vehicle 17 provided on the side wall.
3 in the height direction (vertical direction) of the bridge 13.

Then, the one guide roller 30 rotates in the direction in which the telescopic boom 23 is tilted, and the other guide roller 30 rotates in the direction in which the telescopic boom 23 is tilted.
1 rotates in the turning direction, and each of the guide rails 3
It is adapted to roll over predetermined parts 2 and 33.

Therefore, the vertical and horizontal tilting loads that the lifter 24 receives when the telescopic boom 23 is tilted and rotated are transmitted through the guide rollers 30 in the vertical direction and through the guide rollers 31 in the horizontal direction. This allows the main body portion 17A to effectively support it.

The lifter 24 may be moved up and down by being pulled by a winch installed at the top of the main body 17A of the side inspection vehicle 17, or by providing a pinion on the lifter 24 side and a rack on the main body 17A side to raise and lower it. Also good.

Further, in the figure, 34 is a roadway formed on the top of the bridge 13, and 35 is a track laid inside the bridge 13, on which trains and the like run.

Because of this configuration, when performing maintenance work such as inspecting the condition of the bridge 13 of the long bridge 12, a worker first gets on the bridge inspection vehicle 14 (side inspection vehicle 17) at the aforementioned bridge inspection vehicle mooring position, The inspection vehicle 14 is moved to a predetermined position.

At this time, there are two side inspection vehicles 17 and bottom inspection vehicle 1.
8 run together, but even if there is a slight misalignment between the two side inspection vehicles 17, the bottom inspection vehicle 18 is freely connected to the side inspection vehicle 17, so the running condition is stable. is obtained.

Furthermore, since the telescopic boom 23 and the work cage 27 are stored as described above, running resistance is low and stable running is possible.

After stopping the inspection vehicle 14 at a predetermined position, the ramp 22 (landing 22) of the side inspection vehicle 17 is
A) Maintenance work is performed on both sides and the bottom of the bridge 13 from scaffolds etc. set up on the bottom inspection vehicle 18.

On the other hand, inside the bridge 13, a telescopic boom 2 is attached to the side inspection vehicle 17 via a lifter 24.
3 as appropriate to extend the work cage 27 to a predetermined position. Of course, at this time, about two workers are inside the work cage 27.

As described above, this telescopic boom 23 is capable of extending and contracting the boom 23B as needed, and also pivoting and tilting using the connection points (pins) A and B with the lifter 24 as fulcrums via the cylinders 26 and 28. Furthermore, since the lifter 24 itself is vertically movable, the work cage 27 can be moved to any desired position while avoiding obstacles.

Therefore, by cooperating the two telescoping booms 23 from both of the two side inspection vehicles 17, it is possible to carry out comprehensive maintenance work inside the bridge 13.

When the maintenance work on the outside of the bridge 13 is completed in this way, the telescopic boom 23 is folded and aligned in the running direction of each side inspection vehicle 17 as described above, and then the bridge inspection vehicle 14 is driven. After moving the inspection vehicle to the mooring position of the bridge tower section 15 or the bridge abutment section 16 and unloading the workers, the inspection vehicle may be moored using a predetermined mooring means.

Since the telescopic boom 23 is attached to the side inspection vehicle main body 17A in this way, there is no need to arrange for a road surface inspection vehicle 5 for high-altitude work as in the conventional example, and maintenance work can be quickly performed and work costs can be reduced. Less is needed. Furthermore, there is the advantage that work can be carried out safely because there is no need to work at high places using scaffolding or the like.

Next, FIGS. 9 and 10 show another embodiment of the present invention.

This is because the columnar main body 17A of the side inspection vehicle 17 in the previous embodiment is connected to two parallel masts 36.
This is an example in which a ramp 22 is attached to one mast 36A, and a cylindrical lifter 24 is fitted to the other mast 36B so as to be movable up and down.

The telescopic boom 23 is only tiltably connected to the lifter 24 via the cylinder 28, and the telescopic boom 23 is rotated by rotation of the lifter 24 in the circumferential direction.

That is, the lifter 24 is divided into upper and lower parts, and the upper lifter 24B is rotated with respect to the lower lifter 24A by a predetermined means (rack and pinion).

This also provides the same effects as the previous embodiment.

As explained above, according to the present invention, an inspection vehicle capable of traveling on the underside and side surfaces of a bridge is equipped with a telescopic boom that can tilt and swivel and has a work cage at its tip. Since it is installed so that it can be moved in the horizontal direction, maintenance work can be carried out over the entire surface of the bridge, both inside and outside, which significantly improves work efficiency. It also eliminates the need for a road inspection vehicle, making it highly responsive and economical. effective.

[Brief explanation of drawings]

Figures 1 and 2 are sectional views of a long bridge equipped with a conventional inspection vehicle, Figure 3 is a side view of a long bridge equipped with an inspection vehicle of the present invention, and Figure 4 is an enlarged longitudinal sectional front view thereof. , FIGS. 5 and 6 are plane and side views of the inspection vehicle, FIGS. 7 and 8 are cross-sectional plane and longitudinal side views of the lifter, and FIGS. 9 and 10 are views of other embodiments of the present invention. FIG. 3 is a front view and a side view of main parts showing an example. 13...Bridge, 17...Side inspection vehicle, 18...
Lower surface inspection vehicle, 20A, 20B, 20C... Rail, 19A, 19B, 19C... Traveling wheel, 12
...Long bridge, 32, 33...Guidance rail, 24...
... Lifter, 27 ... Work cage, 23 ... Telescopic boom.

Claims (1)

[Claims] 1 Column-shaped side inspection vehicles that run suspended from rails laid along both sides of the upper part of the bridge are placed on both sides of the bridge, and a roughly box-shaped bottom inspection vehicle that runs suspended from rails laid along the bottom of the bridge. The inspection vehicle is disposed on the underside, and both ends of the underside inspection vehicle are freely connected to each of the above-mentioned side inspection vehicles, while at least one of the side inspection vehicles is provided with a lifter movable in the height direction of the bridge via a guide member. A bridge inspection vehicle for long bridges, characterized in that a telescopic boom having a work cage at the tip thereof is attached to the lifter so as to be rotatable and tiltable.