JPH02279807A - Operation car for bridge girder - Google Patents

Abstract

PURPOSE:To reduce the number of operation cars to cut down costs required for arrangement by providing a boom with a work bench turning under bridge girders to an operation car body travelling in the direction of bridge axis among the bridge girders, and making inspection and repairement of both sides of the bridge girders. CONSTITUTION:An operation car body 1 travelling along a guide rail 5 is suspended among bridge girders 2, 3 and 4 arranged in parallel through rollers 6. After that, an expansion boom 9 is placed on a swivel base 7 provided to the central part of a floor of the operation car body 1, and a work bench basket 14 is placed to the end of the boom through a link 11 and ups and downs cylinders 12 and 13. The basket 14 is turned and held to the outsides of the bridge girders 2 and 4 by a controlling gear 15, an inspection and repairement of both sides of them is made and, at the same time, the boom 9 is turned to the insides of the bridge girders 2 and 4 to pass a bridge pier 20 without interfering with a bridge pier bearing 21. According to the constitution, the number of operation cars is reduced, and costs for arrangement can be cut down.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement of a bridge girder work vehicle that runs along a bridge girder for inspecting and repairing the girder of a long bridge.

(Conventional technology) Bridge girder work vehicles used for inspecting and repairing girders of long bridges are, for example, installed along the bridge girders and suspended from the idle rails via a plurality of rollers. It runs along the side of the bridge girder guided by rollers.

(Problem to be solved by the invention) In this case, when trying to cover both sides of the bridge girder with one work vehicle, the work vehicle connects the work platforms facing both sides of the bridge girder with a connecting member passing under the bridge girder. Although it becomes a structure,
In this structure, the connecting members interfere with the support of the bridge girder at the pier, making it impossible to pass through the pier, and therefore it was necessary to provide a working vehicle for each span.

Furthermore, since such work vehicles are always exposed on the sides of the bridge girder even when not in use, there is a problem in that they tend to spoil the appearance of the bridge.

SUMMARY OF THE INVENTION In order to solve the above problems, it is an object of the present invention to provide a bridge girder work vehicle that can pass through bridge piers and is not exposed to the outside of the bridge girder when not in use.

(Means for Achieving the Object) The present invention supports a working vehicle main body between the girders of a plurality of bridge girders arranged in parallel so that it can travel in the bridge axis direction, and a boom that swings below the bridge girder is used for this work. It is installed in the vehicle body, and a workbench is supported at the tip of this boom.

(Function) By rotating the boom attached to the work vehicle body in the transverse direction of the bridge girder, the work platform is supported on the outside of the bridge girder, and the work vehicle body and work platform can work on both sides of the bridge girder. During work, by swinging the boom forward or backward of the work vehicle body, the work platform is stored between the girders and is not exposed to the outside of the bridge girder. Furthermore, by driving the work vehicle body in the direction of the bridge axis in this state, the work vehicle can freely move beyond the bridge piers and across the entire span of the bridge.

(Example) Embodiments of the present invention are shown in FIGS. 1 and 2.

In Figure 1, 1 is 111 m2 and 3 long bridges in parallel.
This is the main body of the work vehicle, which is placed one by one between the and 4 girders.

Bridge girders 2.3 and 4 are connected to piers 20 via bearings 21, respectively.
The work vehicle body 1 is supported by these bridge girders 2.3 and 4.
It is suspended from the idle rail 5 via a plurality of rollers 6, and travels along the guide rail 5 by driving a traveling device (not shown).

As shown in FIG. 2, a swivel base 7 that rotates in the horizontal direction is provided in the floor rP of the work vehicle body 1.
A base end of a telescoping boom 9 is rotatably supported in a vertical direction by a bracket 8 which is provided to protrude downward. The swivel base 7 is rotated by the drive of an actuator provided in the work vehicle main body 1, and the boom 9 is extended and contracted by the drive of another 7 actuators installed inside.

Also, a luffing cylinder 1 for driving the boom 9 up and down.
0 is interposed between the base of the boom 9 and the bracket 8.

A basket 14 serving as a workbench is supported at the tip of the boom 9 via a link 11 and undulation cylinders 12 and 13.

The link 11 is the part near the tip of the boom 9 and the basket 1
Each hinge is connected to the lower side of 4.

The undulation cylinder 12 is interposed between the tip of the boom 9 and the intermediate portion of the link 11, and supports the link 11 at an arbitrary elevation angle with respect to the boom 9. Further, the undulating cylinder 13 is interposed between the intermediate part of the link 11 and the bottom part of the basket 14,
Support the iskerat 14 at an arbitrary elevation angle relative to the link 11.

In addition, the basket 14 is provided with the following functions: driving the luffing cylinders 10, 12 and 13, driving each of the seven cutter units that rotate the swivel base 7 and extending and retracting the boom 9, and driving the traveling device of the work vehicle body 1. An operating device 15 is provided for control by an operator in the basket 14.

Explain the effects to the dog.

As shown in FIG. 2, the work vehicle retracts the boom 9 in the direction of the bridge axis and supports the basketball throat 14 in front or behind the work vehicle body 1. It is stored between 3 and 4. Therefore, the stored work vehicles will not be exposed outside the bridge. Furthermore, no idle rails 5 are provided on the outside of the bridge girders 2 and 4. Therefore, there is no risk that these facilities will detract from the beauty of the bridge.

On the other hand, when using the work vehicle to inspect or repair the bridge girders 2 to 4, an operator riding in the basket 14 uses the operating device ll! 15 to first extend and drive the luffing cylinder 10 from the storage position, and rotate the boom 9 downward. In addition, when the undulation cylinder 10 is driven to extend or contract, the undulation cylinders 12 and 13 are driven together to keep the basket 14 horizontal at all times.

Next, the swivel platform 7 is rotated 90 degrees so that the boom 9 crosses below the bridge girder 2 (4), and the basketball
) After the boom 9 is extended until it reaches the opposite side of the boom 9, the undulating cylinder 10 is retracted and the boom 9 is rotated to the horizontal position.

In this way, the work vehicle becomes ready for work as shown in FIG. To inspect and repair the bridge girder 2 (4), the operator drives the traveling device via the operating device 15, and the work vehicle body 1
and the basket 14 while running in the direction of the bridge axis.

By the way, when the work vehicle approaches the pier 20, the boom 9
Due to interference with the support 21, the work vehicle cannot move forward any further. In that case, the basket 14 is held in front or behind the work vehicle main body 1 by rotating the boom 9 downward and rotating the swivel base 7 by 90 degrees, and then returning the boom 9 to the horizontal position. Thereby, the work vehicle passes through the pier 20 without interfering with the support 21. After passing, the basket 14 is set to the working position again and inspection and repair work on the bridge girder 2 (4) is resumed.

Furthermore, after the work is completed, the basket 14 is stored in the position shown in FIG. 2 in the reverse order from when the work was started.

Incidentally, α inspection and repair of the bridge girder 3 are performed from the work vehicle bodies 1 on both sides of the bridge girder 3.

(Effects of the Invention) As described above, the present invention includes a work vehicle main body that runs in the bridge axis direction between the girders of a plurality of parallel bridge girders, and a boom with a work platform at the tip that is perpendicular to the work vehicle main body. Since it is supported freely to rotate in the horizontal direction, inspection and repair of both sides of the bridge girder can be carried out by holding the work platform outside the bridge girder via the boom that crosses below the bridge girder, and the boom can also be rotated to the inside of the bridge girder. As a result, bridge piers can also be passed through. Therefore, inspection and repair of bridge girders can be carried out over the entire span using a small number of work vehicles.
The cost required for deploying work vehicles can be significantly reduced.

Additionally, when no work is being done, the entire work vehicle can be stored between the girders by rotating the boom, which has a significant effect on maintaining the beauty of the bridge.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a long bridge showing an embodiment of the present invention, and FIG. 2 is a side view of a working vehicle in a stored state. 1... Work vehicle body, 2.3.4... Bridge girder, 5...
〃Idrail, 6...Roller, 7...Swivel base, 9.
...Boom, 10.12,13...Luffing cylinder, 1
1... Link, 14... Basket, 15... Operating device.

Claims (1)

[Claims] The work vehicle body is supported between the girders of a plurality of bridge girders arranged in parallel so that it can run in the bridge axis direction, and the work vehicle body is equipped with a boom that swings below the bridge girders, and a work platform is attached to the tip of the boom. A bridge girder work vehicle characterized by supporting.