JPH051322B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a bridge inspection and repair work device used for inspecting and repairing tower pillars of suspension bridges, cable-stayed bridges, etc.

[Conventional technology] Tower pillars of suspension bridges and cable-stayed bridges are periodically inspected for cracks in welded parts and bolts in bolted joints.
Repairs such as repainting are being carried out.

In the past, bridge managers conducted inspections using observation means such as binoculars. In addition, a method was used in which scaffolding for inspection was temporarily erected on the tower pillar to directly inspect and repair the tower, and another method was to suspend a gondola from the top of the tower and raise and lower the gondola to inspect and repair.

[Problem that the invention seeks to solve]

However, in the conventional method in which the administrator visually inspects the tower, it is difficult to detect rust, corrosion, etc. under the paint on the tower pillars, and there is a problem in that proper inspection cannot be performed.

In addition, the conventional method of temporarily installing scaffolding on tower pillars requires a large amount of equipment in the case of large bridges, and in some locations, there are problems such as long-term traffic control measures, etc. It was difficult to temporarily erect scaffolding up to the site, and there was a problem that it was dangerous for workers to climb up.

Furthermore, in the conventional example in which the gondola is suspended from the top of the tower, there is a problem in that the gondola cannot follow the sloped surface such as the reinforced part of the tower pillar, making inspection and repair impossible. In addition, this gondola is susceptible to the effects of wind at high places, and inspections of welded parts, etc., must be performed by engineers who are not familiar with working at high places, which poses a major safety problem.

[Means for solving problems]

This invention provides a strip winding machine installed at the top of a tower pillar 1 of a bridge such as a suspension bridge or a cable-stayed bridge in which tower pillars 1 on both sides in the width direction of a bridge body 8 are connected by a beam portion 3b. 2, and a track 4 laid along the vertical direction of the inner surface 3a of the reinforcing material 3 provided inside the column 1 integrally with the column 1. A working device for inspection and repair consisting of a working vehicle 5 that is suspended and travels, the working vehicle 5 being
A running frame 5a that runs on the track 4, and a running frame 5a that is attached to both left and right sides of the running frame 5a so as to be movable back and forth and left and right on a horizontal plane, and separately laid along the vertical direction on the column surface on the side of the reinforcing material 3. and each slide frame 5b that runs so as not to deviate from the track 6 that is set.
A and both slide frames 5b enable the traveling frame 5a to follow the three sides of the reinforcing member 3, and furthermore, the traveling frame 5a is separably connected into two parts between the two slide frames 5b, and can be separated as it moves up and down. so that the beam portion 3b can be avoided by
It constitutes work equipment for inspection and repair of bridges.

[Effect]

A strip winder 2 provided at the top of the column 1 raises and lowers a working vehicle 5 suspended from the strip 9 by winding up and lowering the strip 9. At this time, work vehicle 5
The running frame 5a that constitutes the tower runs on a track 4 laid along the inner surface 3a of the reinforcing member 3, and the slide frame 5b runs on a track 6 laid on the tower column 1 so as not to deviate from it. . and,
As the slide frame 5b moves up and down, it moves back and forth and left and right with respect to the traveling frame 5a on a horizontal plane according to changes in the cross-sectional shape, dimensions, etc. of the reinforcing member 3, and follows changes in the dimensions, etc. Therefore, even if the cross-sectional dimensions of the reinforcing material 3 change in the vertical direction, the work vehicle 5 always protects the reinforcing material 3 from three sides.
The reinforcing material 3 is surrounded by the reinforcing material 3 while maintaining a certain distance therebetween, and the reinforcing material 3 can be completely inspected and repaired.

Furthermore, since the traveling frame 5a is separably connected in two parts between both slide frames 5b, it can be separated as it moves up and down. The connecting beam portions 3b can be raised and lowered while being avoided by the separation. Therefore, the beam portion 3b can be moved vertically, and inspection and repair can be performed efficiently with one working vehicle 5.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in the drawings will be described in detail below.

In the figure, 1 is a tower pillar of a cable-stayed bridge, and a bridge body 8 is usually installed on a beam 7 that is constructed at a predetermined level of two tower pillars 1, 1 that are erected. . Also,
A substantially H-shaped reinforcing member 3 is provided at the top of the tower pillars 1, 1 by connecting the opposing surfaces, and acts on both tower pillars 1, 1 in the bridge axis direction and in the direction perpendicular to the bridge axis. This adds strength against external forces.

Note that the thickness of this reinforcing material 3 is usually smaller than the width dimension of the tower pillar 1 in the bridge axis direction, and its cross-sectional shape in the horizontal plane is trapezoidal, as shown in FIGS. 5 and 6. The height h gradually increases from the lower end toward the beam portion 3b. FIG. 5 shows a cross section of the reinforcing material 3 and the tower column at a lower position than in FIG. 6. Further, the height h gradually decreases upwardly above the beam portion 3b.

On the inner surface 3a of the reinforcing material 3, two tracks 4, 4 made of H steel are laid down above and below the surface. Further, on the surface of the tower column 1 facing the bridge body 8 side on both sides of this reinforcing material 3, another track 6,
6 is installed.

A strip winder 2 for winding strips 9, such as wire ropes and chains, is mounted on the top of the column 1.

These strips 9, 9 are connected to one working vehicle 5, and when both strips 9, 9 are wound synchronously, the working vehicle 5 is raised.

The work vehicle 5 is composed of a traveling frame 5a and slide frames 5b, which are attached to both ends of the traveling frame 5a so as to be movable in front, rear, left and right directions on a horizontal plane.

Wheels 10, 10 that run on the tracks 4, 4 are mounted on the running frame 5a, and the tracks 6, 6 are mounted on the ends of the slide frames 5b, 5b closer to the column 1. Wheel parts 11, 11 are provided that run so as not to run off, and when lifted by the strips 9, 9, this work vehicle 5
Drive while maintaining stability. Note that even when the strips 9, 9 are rewound, the descending operation is still performed while maintaining stability.

Further, the traveling frame 5a is provided with a locking tool 1 so that the traveling frame 5a can be separated between both ends thereof, particularly at the center.
2 and 12, and the work vehicle 5
When it rises and reaches the beam part 3b of the reinforcing member 3, the locking tools 12, 12 are released and the divided running frame 5a is moved to the slide frame 5.
By letting it escape to the b side, it becomes possible for the working vehicle 5 to pass and rise through the beam portion 3b. In this case, especially
A track 13 made of H steel rails is separately laid on both sides of the reinforcing member 3 in the vertical direction of the beam portion 3b, and a slide frame 5 is mounted on this track 13.
Wheels 14, which are separately mounted on the shafts of b, are adapted to run, and in particular, the wheels 14 are designed in such a manner that they do not deviate from the track 13 when running.

Therefore, the work vehicle 5, which has been separated into two parts, can stably ascend both sides of the reinforcing material 3 by the strips 9, 9 that are wound synchronously, and inspection and repair work can be performed on both sides. Become. After the work vehicle 5 which has been separated into two passes through the beam portion 3b and ascends, the traveling frame 5a is reconnected and fixed with the locking tools 12, 12, and work on the inner surface 3a and both side surfaces of the reinforcing member 3 is carried out. becomes possible. Furthermore, a handrail 14 that surrounds the floor is provided on the top surface of the work vehicle 5 to ensure the safety of the worker. The handrail 14 is configured to move in accordance with the movements of the travel frame 5a and slide frame 5b.

Below, the traveling frame 5a and the slide frame 5
The operating mechanism of b will be explained.

As shown in FIG. 4, two slide rails 15, 15 parallel to the longitudinal direction are provided on the lower surface of the traveling frame 5a, and are slidably locked to these slide rails 15, 15. Sliding member 1
6 and 16 are integrally provided on the left and right slide portions 17. Further, a front and rear slide section 18 is fitted into the left and right slide section 17.
The slide rod 19 provided on the left and right slide portions 17
The guide tube 20 is inserted into the guide tube 20 provided on the inner surface of the guide tube 20 to regulate the sliding direction of the front-rear slide section 18.

In addition, the left and right slide parts 17 and the front and rear slide parts 1
Reference numeral 8 is for driving rack plates (not shown) provided in each sliding direction by rotating gears (not shown) meshing with the rack plates (not shown).
The operation is performed by driving handles 20a, 20b, 20c, and 20d provided at appropriate locations on the slide frame 5b.

Note that FIGS. 5 and 6 show the running frame 5a.
This shows the state of the slide frames 5b, 5b.

FIG. 5 shows a state where the work vehicle 5 is located near the lower end or the upper end of the reinforcing member 3, and since the height _h1 of the trapezoid in the horizontal section of the reinforcing member 3 is short, the slide frame 5b, 5b are running frames 5a
In contrast, it is retreating in the direction opposite to the tower pillar 1.

Further, FIG. 6 shows the state of the work vehicle 5 near the beam portion 3b where the height _h2 has become longer, and the slide frames 5b, 5b are oriented toward the column 1 with respect to the traveling frame 5a. The vehicle moves forward, and the distance between the slide frames 5b and 5b becomes longer. In this way, by moving the slide frames 5b, 5b according to the condition of the reinforcing material 3, the work vehicle 5 surrounds the three sides of the reinforcing material 3, making it possible to inspect and repair the part. .

Although one embodiment to which the present invention is applied has been described above, various design changes can be made in accordance with the gist of the configuration of the present invention. Of course, it is also possible to configure the portion 18 upside down.

Further, it is possible to use an electric motor to drive the slide frame 5b with respect to the traveling frame 5a, and furthermore, the movement of the slide frame 5b can be performed using a position detector, a control device, etc., which improves the work efficiency. Of course, it is also possible to make the process smoother.

〔Effect of the invention〕

As is clear from the above explanation, by attaching the slide frame so that it can move back and forth and left and right in the horizontal plane with respect to the traveling frame, it is possible to follow large cross-sectional changes in the horizontal plane of the reinforcing material on which the tower columns are installed. Therefore, this work vehicle can surround the reinforcing material on three sides and inspect and repair the entire area of the reinforcing material and the reinforcing material of the column.

In addition, the work vehicle has rails provided on the reinforcing material and
The rails installed on the tower pillars have the effect of allowing safe and smooth ascending and descending without being affected by external forces such as wind.

Furthermore, according to the invention, the traveling frame is
Since the two slide frames are separably connected to each other, they can be separated as they move up and down. Therefore, the beams that connect the pillars on both sides of the bridge body in the width direction can be connected to each other in the slide frame. Separation allows you to move up and down while avoiding it. Therefore, it is possible to move the beam portion between the upper and lower sides, and there is a unique effect that inspection and repair can be carried out efficiently with one working vehicle.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment to which the present invention is applied, FIG. 2 is a perspective view of the same working vehicle, FIG. 3 is a plan view of the same, and FIG. 5 and 6, which are cross-sectional views showing the slide mechanism, are explanatory views showing the state of the work vehicle at different positions of the reinforcing member. 1... Tower pillar, 2... Strip winder, 3... Reinforcement material, 4... Track, 5... Working vehicle, 6... Track.

Claims (1)

[Claims] 1. A strip winder 2 installed at the top of the tower pillar 1 of a bridge such as a suspension bridge or a cable-stayed bridge in which tower pillars 1 on both sides in the width direction of the bridge body 8 are connected by a beam portion 3b.
Then, the track 4 laid along the vertical direction of the inner surface 3a of the reinforcing material 3, which is provided inside the column 1 integrally with the column 1, is moved by the strip of the strip winder 2. This is a work device for inspection and repair consisting of a suspended working vehicle 5, and a traveling frame 5a traveling on the track 4, and a horizontal plane on both left and right sides of this traveling frame 5a. Each slide frame 5 is mounted so as to be movable in the front, rear, left and right directions, and runs without deviating from a track 6 that is separately laid along the vertical direction on the surface of the column column on the side of the reinforcing member 3.
b, so that the running frame 5a and both slide frames 5b can follow the three sides of the reinforcing member 3, and the running frame 5a is separably coupled into two parts between both slide frames 5b. A work device for inspecting and repairing a bridge, characterized in that the work device is configured such that it can be separated and avoided the beam portion 3b as it moves up and down.