JPS6332172Y2 - - Google Patents

Description

[Detailed description of the invention] This invention mainly relates to an inspection work vehicle used for inspecting and repairing cracks on the outer surface of tower pillars of cable-stayed bridges, loosening of bolts at cable attachment parts, occurrence of rust, etc. relates to an inspection work vehicle that is capable of inspecting and repairing the entire external surface of the tower column.

The pillars of conventional cable-stayed bridges have a simple shape and are not very large, so a gondola-type work vehicle, which is commonly used for cleaning building windows, is suspended using wire ropes so that it can be raised and lowered. It was possible to carry out inspection and repair work on the above-mentioned work vehicle.

However, recent cable-stayed bridges have large spans, are used in combination with railway bridges and road bridges, and are built in harsh natural environments with strong currents and strong winds, so they are
As shown in the figure, the shape of the tower pillar 1 has become complicated, and the height of the main tower is 150 m, and the width of the second part of the railway bridge is 30 m.
It has become so large that it can reach up to 3 is a road bridge, 4 is a cable, 5 is a middle haunch, 6 is a lower haunch, and 7 is an inspection step.

When inspecting or repairing a tower pillar that has become complicated and large as described above using a conventional gondola-type work vehicle, it is necessary to A guide rail is placed all the way to the bottom of the tower.
It is necessary to raise the work vehicle along the guide rail. However, because the work vehicle is small, it is not possible to inspect or repair the entire outer surface of the tower column unless it is sequentially moved to other locations and worked in the vertical direction. Therefore, it takes a lot of time to transfer the work vehicle to another guide rail, it takes a huge amount of work time to inspect and repair the entire outer surface of the tower pillar 1, and the tower pillar has a sloped part. However, on this slope, there are problems such as changes in the posture of the work vehicle, causing a sense of uneasiness, and danger in windy conditions.

Therefore, recently, as an alternative to the conventional gondola-type work vehicle, inspections can be carried out safely and efficiently.
There is a strong desire for a large inspection work vehicle that can perform repair work, and various types of work vehicles are being considered to meet this demand. An example of this is as shown in the outline in FIG. The sliding floor 11 located on the front and rear sides of the tower column 1 (on the bridge axis direction side) is installed at right angles to the bridge axis in order to retract the slide floor 11 located on the front and rear sides of the tower column 1 to a position where it does not interfere with the cable 4. The slide floor 11 is assembled horizontally so as to be slidable in the direction (arrow x direction).
The structure is equipped with another sliding floor 12 that can be slid forward and backward to accommodate changes in the size of the column 1, making it convenient for inspection and repair work on the front and rear surfaces of the column 1. Things are being thought of.

With this configuration, even if the work vehicle main body 10 moves, the guide rail 8 can be sandwiched between the guide rollers 9, so there is little vertical movement of the floor surface and there is a sense of stability, and the floor surface can be held horizontally. It has the advantage of providing a sense of stability and ensuring work safety. However, there is a problem in that it is impossible to inspect or repair the inside of the tower pillar 1, that is, the inside in the direction perpendicular to the bridge axis.

The present invention aims to provide an inspection work vehicle that can perform inspection and repair work over the entire outer surface of a tower column without an operator.

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

As shown in FIGS. 4 to 8, two rails 13, upper and lower, spirally surround the tower pillar 1.
14 are arranged as a set, and the rails 13 and 14 are connected to a plurality of rail frames 15 and 1 fixed to the outside of the column 1.
6, and at the installation position of the cable 4, the cables 13 and 14 are made to pass between the upper and lower cables 4 so that an inspection work vehicle can pass between the cables 4 without any trouble, and the Rails 13 and 14 are laid on the protruding portion of the horizontal girder so that the inspection vehicle will not collide with the protruding portion.

Among the set of rails, the upper rail 13 is the sixth rail.
As shown in the figure, it is fixedly supported on a rail frame 15, and a rack 17 is carved along the entire length on the outer surface of the upper rail 13, and a pinion 18 that meshes with the rack 17 and the upper surface of the upper rail 13 are formed. A working vehicle main body 21 having guide rollers 19, 20 on the upper part that can roll along the inner surface is engaged with the upper rail 13 via the guide rollers 19, 20, and the pinion 18 is engaged with the rack 17. , the pinion 18 is rotated by the drive of a motor 22 with a reducer installed at the top of the work vehicle body 21, so that the work vehicle body 21 can run along the upper rail 13; , the lower rail 14 is fixedly supported on the lower surface of the rail frame 16 as shown in FIG. It is attached to the lower part of the main body 21, and when the pinion 18 rotates, guide rollers 19 and 20 are engaged with the upper rail 13, and guide rollers 23, 24, and 25 are engaged with the lower rail 14, and the work vehicle is rotated. The main body 21 is configured to be able to move in a spiral manner.

The work vehicle main body 21 is provided with a work scaffold 26 protruding from the tower pillar 1 side, and a guide rail 27 is formed vertically on the back side.
An elevating frame 29 is attached to the guide rail 27 via guide rollers 28 so as to be movable up and down.
Rack 3 carved on the outer surface of the guide rail 27
0, the pinion 3 provided at the top of the elevating frame 29
1 are engaged with each other, and the pinion 31 is rotated by a motor 32 with a reduction gear, so that the elevating frame 29 can be moved up and down along the guide rail 27. Further, a work scaffold 33 is attached to the lower end of the elevating frame 29 and extends toward the tower pillar 1 side. 34 is a stopper for determining the lower limit position when the elevating frame 29 is lowered; 35, 3;
Reference numeral 6 denotes a monitor television camera installed on the work vehicle body 21 and the lifting frame 29 so as to monitor the work situation at the work place, and 37 represents a ladder attached to the work vehicle body 21.

With the above configuration, when performing work such as inspection and repair of the tower pillar 1 using this work vehicle, for example,
The work vehicle is raised to the top of the tower and then descended from the top to perform the necessary work.

When lowering the working vehicle, the motor 22 with a speed reducer is driven to rotate the pinion 18 in a direction that allows the vehicle to move downward. As a result, the working vehicle main body 21 travels at a slow speed due to the meshing of the pinion 18 and the rack 17, which are rotated at a reduced speed. The work vehicle main body 21 has guide rollers 19, 20 and 2 on the upper rail 13 and the lower rail 14.
3, 24, and 25, there is little shaking when traveling along the rails 13, 14, giving a sense of stability.

Inspection and repair of the tower column 1 are performed using the work scaffold 26 of the work vehicle main body 21, or the elevating frame 29 is moved to the pinion 31 by a motor 32 with a reducer.
The work is carried out by rotating the work platform 33 to raise and lower it appropriately. At this time, since the elevating frame 29 can be lowered to the stopper 34 position, the work platform 33 can be lowered from the solid line position to the chain line position in FIG. 6, thereby expanding the work range.

When passing through the position of the cable 4, the elevator frame 29 is pulled upwardly as shown in FIG. 4 so as not to interfere with the cable 4.

In the present invention, monitor television cameras 35 and 36 are installed on the work vehicle body 21 and the lifting frame 29, so painting robots, bolt tightening robots, etc. are used for high-altitude work, and workers are safe on the ground. It is possible to perform inspection and repair work on the tower pillar 1 by remote control from a suitable location. This allows unmanned inspections and repair work to be carried out safely and accurately without relying on the operator's vision.

However, the present invention is not limited to the above-mentioned embodiments; for example, it can be easily applied to other tower pillars, piers, chimneys, etc. other than the tower pillars of cable-stayed bridges, and other features of the present invention can be realized. Of course, various changes may be made without departing from the gist.

As described above, according to the inspection work vehicle of the present invention, the rails are arranged in a spiral pattern from the top of the tower column to the bottom, avoiding cables that may become obstacles, and the work vehicle body is guided on the rails. In addition to being supported via rollers, the rack provided on the rail is engaged with a pinion provided on the work vehicle body so that the work vehicle body can freely travel, and the work vehicle body is equipped with an elevating frame that can be raised and lowered freely. This allows inspection, repair, etc. to be carried out while going around the tower pillars, allowing work to be carried out on the entire outer surface of the tower pillars.
In addition, since the work vehicle itself is equipped with an elevating frame, work over a wide range can be performed safely.Furthermore, by installing a monitor TV camera on the work vehicle body or elevating frame, robots can This enables workers to perform work remotely from a safe location such as on the ground.
Unmanned work can be realized and work can be done more safely.

[Brief explanation of the drawing]

Figure 1 is a front view of a recent cable-stayed bridge pilaster, Figure 2 is a view taken along the A-A arrow in Figure 1, and Figure 3 is a recent view of the tower pillar in Figure 1 that has been considered for work. 4 is a side view of the working vehicle of the present invention, FIG. 5 is a plan view of FIG. 4, FIG. 6 is an enlarged view of section B in FIG. 4, and FIG. 7 is a side view of the working vehicle of the present invention. The front view of the figure, and FIG. 8 is a plan view taken from direction C in FIG. 6. 1... Tower pillar, 2... Railway bridge, 3... Road bridge, 4... Cable, 13... Upper rail, 14... Lower rail, 1
5, 16...Rail frame, 17...Rack, 18...Pinion, 21...Working vehicle body, 22...Motor with reducer, 26...Working scaffold, 27...Guide rail, 29
...Lifting frame, 30...Rack, 31...Pinion, 32...Motor with reducer, 33...Working scaffold, 3
5,36...Monitor TV camera.

Claims (1)

[Scope of utility model registration request] A rail is installed in a spiral shape on the outside of the tower pillar so as to wrap around the tower pillar, and the work vehicle main body having a guide roller that rolls along the rail is supported by the rail via the guide roller, and A pinion that meshes with the provided rack is provided on the work vehicle body, a driving device for the pinion is provided on the work vehicle body, and an elevating frame with a work scaffold is supported on the work vehicle body so as to be freely raised and lowered. A vehicle for inspecting tower pillars.