JPH0481001B2 - - Google Patents

Description

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

[Conventional technology]

Tower pillars of suspension bridges, cable-stayed bridges, etc. are regularly inspected for cracks in welded areas, missing bolts in bolted joints, and repaired by repainting.

Such inspections and repairs can be carried out by the administrator using observation means such as binoculars, by temporarily erecting inspection scaffolding on the tower pillars, and directly inspecting and repairing them, or by suspending the gondola from the top of the tower. The current method is to raise and lower the gondola for inspection and repair.

[Problem that the invention seeks to solve]

However, in the conventional method where 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 carried out.

In addition, the conventional method of temporarily installing scaffolding on tower pillars requires a large amount of equipment for large bridges, and in some locations, there are problems such as the need for long-term traffic restrictions and other problems. Temporary construction of scaffolding was difficult, and there were also problems in that it was dangerous for workers to climb on it.

Furthermore, in the conventional case where the gondola is suspended from the top of the tower, the cable installed in the middle of the tower becomes an obstacle, and the surface of the tower pillar from which the gondola is suspended is limited, resulting in a narrow inspection range. It has points. Furthermore, this gondola has the problem of being unstable at high places due to the influence of wind.

[Means for solving problems]

This invention provides a strip winder installed at the top of a column of a bridge such as a suspension bridge or a cable-stayed bridge, and a track laid along the outer surface of the column. In a bridge inspection device consisting of an inspection vehicle that travels while suspended from and a slide frame that is mounted so as to be movable back and forth and left and right on a horizontal plane, and a depressed portion that is depressed downward and becomes low is formed at both left and right ends of the traveling frame, and the upper surface of the depressed portion of the traveling frame is provided with the A slide frame is mounted on the upper surface of the depressed portion of the traveling frame, and the slide frame is mounted on the upper surface of the depressed portion of the traveling frame so as to be movable back and forth in the front and rear directions, and the front and rear slide portions forming the lower part of the slide frame and the upper surface of the front and rear slide portions are connected to each other. The tower is mounted on the side of the tower so that it can move back and forth in the left and right directions towards the tower, and is fixed to the left and right slide parts that form the upper part of the slide frame, and to the upper side of the depressed part of the traveling frame on the upper surface of the front and rear slide parts. , a left and right extension part forming an upper part of the slide frame together with the left and right slide parts, the upper surface of the traveling frame, the upper surface of the left and right sliding part, and the upper surface of the left and right extension part are formed on the same plane, and the upper surface of the traveling frame Sides at both left and right ends, sides on the traveling frame side and left and right sliding part side of the left and right extension parts, and sides on the left and right extension part side of the left and right sliding parts,
Handrails are fixed to all sides except for each side.

[Effect]

The strip winder raises and lowers the inspection vehicle via the strip, and transports the inspection vehicle to an appropriate inspection position.

The running frame in the inspection vehicle runs along the track of the tower pillar, and the slide frames at both ends of the running frame move forward, backward, left and right on a horizontal plane, and follow the side surface of the tower pillar so as to be close to the side surface. perform an action.

Further, if there is an obstacle such as a cable on the tower pillar, the slide frame moves to avoid the obstacle.

The moving operation of the slide frame to avoid the obstacle is performed by moving the front and rear slide sections back over both left and right ends of the traveling frame. At this time,
When the front and rear slide portions retreat, the left and right slide portions and left and right extensions on the front and rear slide portions move back together with the front and rear slide portions. This is the right slide frame shown in FIG. 2b.
As a result, the slide frame is separated from the side surface of the column, so that the traveling frame can be moved up and down even if cables or the like are present on the side surface of the column. The same applies to the left slide frame.

In addition, when the left and right sliding parts of the slide frame move toward or away from the side surfaces of the tower column, the front and rear slide parts that form the lower part of the slide frame do not move, and the left and right slide parts above the front and rear slide parts do not move. Only the sliding part moves in the said direction to change the distance to the column side. This allows work to be done at a distance that corresponds to the width of the column and the content of the work. The left and right slide portions in FIG. 2b show the state in which the left and right slide portions are close to the tower column at this time.
Of course, the same applies to the left and right sliding portions on the right side.

Further, in the present invention, both left and right end portions of the traveling frame fall downward to form a depressed portion, and a slide frame is mounted on the upper surface of this depressed portion, and the upper surfaces of the left and right slide portions forming the upper surface of this slide frame. Since the upper surfaces of the left and right extensions are both on the same plane as the upper surface of the traveling frame, workers can walk on the same plane when moving between the traveling frame and the slide frame, making it safer. You can move around and focus your attention elsewhere.

Furthermore, the arrangement of the handrails in this invention is such that when the slide frame retreats, the entire circumference of the upper surface of the traveling frame is automatically surrounded by the handrail, and when the slide frame moves forward, the upper surfaces of both the traveling frame and the slide frame are automatically surrounded by the handrail. Since the handrails are continuous with the handrails and the entire outer periphery thereof is surrounded by the handrails, the handrails are always surrounded by the handrails and safety can be ensured without the need for removing or reinstalling the handrails.

〔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 3 is usually installed on a beam 2 that is constructed at a predetermined level of two tower pillars 1, 1 that are erected. . Moreover, a plurality of cables 4 to 4 are stretched between the upper parts of the tower columns 1 and 1 and the side edges of the bridge body 3 so that the bridge body 3 does not bend in the span.

In addition, these cables 4 to 4 are attached to the side surface 1 of the tower column 1 facing the bridge axis direction, as shown in FIG.
The connection is fixed at 6 and 16.

The cables 4 to 4 in the tower pillar 1 are not fixed, and two guide rails 5, 5 made of H-beam steel are installed above and below on the surface 1a facing the outside of the bridge (hereinafter referred to as the outside surface). They are fixedly installed in parallel in the direction.

A wire winding machine 6 is mounted on the top of the column 1, and wire ropes 7, 7 of a length reaching the lower end of the column 1 are wound around it.

These wire ropes 7, 7 are connected to one inspection vehicle 8.
By winding both wire ropes 7, 7 synchronously, the inspection vehicle 8 is raised.

As shown in FIG. 2, the inspection vehicle 8 is composed of a running frame 8a and slide frames 8b, which are attached to both ends of the running frame 8a so as to be movable in the front, back, left and right directions on a horizontal plane. ing.

The running frame 8a is provided with wheels 9, 9 that run on guide rails 5, 5 provided on the tower pillar 1 without deviating from the guide rails 5, 5, and the wire ropes 7,
7, this traveling frame 8a travels while maintaining stability. Note that even when the wire ropes 7, 7 are unwound, the descending operation is still performed while maintaining stability.

As shown in FIGS. 3 and 4, the slide frames 8b and 8b are provided with a front and rear slide portion 10 so as to be movable in a direction perpendicular to the longitudinal direction of the traveling frame 8a. The front-rear sliding portion 10 has a groove 10a for running the roller 11, whose reciprocating motion is regulated along a predetermined trajectory by guide rollers 11 to 11 mounted on the running frame 8a.

A rack plate 12 is integrally provided on this front-rear slide section 10 along the direction of movement thereof. Further, a driving device 1 is provided on the traveling frame 8a.
3 is provided to rotationally drive a gear 14 meshing with the rack plate 12.

Furthermore, left and right slide parts 15 that slide in a direction perpendicular to the operating direction of the front and rear slide parts 10 are provided on the upper surface of the front and rear slide parts 10 in the slide frame 8b. Reference numeral 16 shown in FIG. 3 is a drive device 16 that manually drives the handle 17 to rotate, and transmits rotation to a screw rod 19 that is screwed into a guide nut 18 fixed to the upper surface of the front and rear slide section 10.

Further, on the upper surface of the front-rear slide section 10, a guide rod 2 is provided in the same direction as the screw rod 19, that is, in a direction perpendicular to the operating direction of the front-rear slide section 10.
0, and a slider (not shown) that is slidably fitted onto the guide rod 20 is fixed to the lower part of the left and right slide portions 15.

Both ends of the traveling frame 8a are depressed portions (see FIG. 3) that are depressed downward.
The front and back slide portion 10 is placed on the upper surface of this depressed portion.
is listed. On the upper surface of this front-rear sliding portion 10, a left-right extension portion 22 is provided above the depressed portion.
(see Fig. 2) is fixed, and the left and right slide parts 15 are installed on the upper surface of the front and rear slide parts 10 at the side positions of the tower pillar 1 so as to be movable forward and backward with respect to the side faces of the tower pillar 1 as described above. ing.

In this way, the upper surfaces of the front and rear slide portions 10 and the left and right extension portions 22, which form the upper surface of the slide frame 8b, are at the same height as the upper surface of the traveling frame 8a, so that all movement of the worker is on the same plane. Become.

In FIG. 2, handrails are fixed to the edges of the traveling frame 8b, the left and right extensions 22, and the left and right sliding parts 15, which are indicated by double lines.

Next, the operation of the slide frame 8b will be explained based on FIG. 2. In the slide frame 8b on the left side of the tower pillar 1 in FIG. It is in a state where it has moved to the right as it approaches (therefore, the front and rear slide parts 10 below the left and right slide parts 15
is appearing. ). In addition, in the slide frame on the right side of the tower pillar 1, the top of the end of the traveling frame 8b is
The front and rear slide parts 10 are in a retreated state with the left and right slide parts 15 and the left and right extension parts 22 mounted thereon.

In this way, the left and right sides of the slide frame 8b may perform different movements or may perform the same movement, but when the slide frame is in the forward movement state as shown in FIG. 1, the top surface of both slide frames 8b and the top surface of the traveling frame 8a are not separated by a handrail, and the entire periphery of the top surface is surrounded by a handrail. Even in the state on the left side of FIG. 2b, where the left and right slide parts 15 approach the tower pillar 1, the top surface of the traveling frame 8a and the top surface of the slide frame 8b are not separated by the handrail, and their outer peripheries are surrounded by the handrail. There is. Furthermore, in the state on the right side of FIG.
Since the ends without handrails are blocked by the handrails of the left and right slide parts 15 of the slide frame, the workers are not working when the whole is being raised and lowered, so they cannot stand on this traveling frame 8a. If so, safety will be ensured. Therefore, even if the width of the column 1 changes depending on the location, an appropriate relative position to the side surfaces 1b, 1b can be secured by the movement of the left and right sliding parts 15 of these slide frames 8b, 8b. is possible.

In addition, this inspection vehicle 8 ascends and inspects the cables 4 to 4.
4, move the front and rear slide parts 10 to escape from this cable 4, and move the inspection vehicle 8 without causing any obstruction.
, and in the position shown in FIG. 5 and FIG.
1b, the cable 4
Enables inspection and repair work near the connection.

If such an operation is performed for each cable 4, the inspection vehicle 8 can be lifted and moved near the top of the tower.

Although one embodiment to which the present invention is applied has been described above, the present invention is not limited thereto, and 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 15 upside down.

Further, the guide rails 5 and wire ropes 7 laid on the tower column 1 may be singular or plural, and may be changed as appropriate depending on the structure, weight, etc. of the inspection vehicle.

Furthermore, in this bridge inspection apparatus, it is also possible for a worker riding on the inspection vehicle 8 to remotely control the wire winding machine 6.

〔Effect of the invention〕

As is clear from the above description, in this invention, the inspection vehicle is constructed of a running frame and a slide frame, and since this slide frame is movable back and forth and left and right, suspension bridges, cable-stayed bridges, etc. This has the effect of allowing inspection and repair work to be carried out over a wide area on three sides of the tower pillar.

Furthermore, since the inspection vehicles can surround three sides of the tower column in a U-shape, it is effective in preventing shaking caused by wind and ensuring the safety of workers.

Furthermore, the operation of the slide frame has the effect that when there are obstacles such as cables on the tower pillar, the inspection vehicle can be raised and lowered while avoiding them.

Furthermore, in the present invention, both left and right end portions of the traveling frame fall downward to form a depressed portion, and a slide frame is mounted on the upper surface of this depressed portion, and the upper surfaces of the left and right slide portions forming the upper surface of this slide frame. Since the upper surfaces of the left and right extensions are both on the same plane as the upper surface of the traveling frame, workers can walk on the same plane when moving between the traveling frame and the slide frame, making it safer. and can be moved to
You can concentrate your attention elsewhere.

Furthermore, the arrangement of the handrails in this invention is such that when the slide frame retreats, the entire circumference of the upper surface of the traveling frame is automatically surrounded by the handrail, and when the slide frame moves forward, the upper surfaces of both the traveling frame and the slide frame are surrounded by the handrail. Because they are automatically continuous and their entire periphery is surrounded by handrails,
Another advantage is that safety can be ensured by always being surrounded by handrails without having to remove or reinstall them.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a bridge inspection device to which the present invention is applied, FIG. 2 is an explanatory diagram showing the operation of the inspection vehicle,
Figure 3 is a side view showing the connecting part of the running frame and slide frame of the inspection vehicle, Figure 4 is a perspective view of the inspection vehicle, and Figures 5 and 6 are the inspection vehicle at the cable connection part of the tower column. It is an explanatory diagram showing a state. 1... Tower pillar, 2... Bridge body, 5... Guide rail, 6...
Wire winding machine, 7...wire, 8...inspection vehicle, 8a...
Traveling frame, 8b...slide frame.

Claims (1)

[Scope of Claims] 1. A strip winder installed at the top of a tower pillar of a bridge such as a suspension bridge or a cable-stayed bridge, and a track laid along the outer surface of the tower pillar. In this bridge inspection device, the inspection vehicle is connected to a running frame that runs along the track along the front of the tower column, and a running frame that runs along the front side of the tower column at both ends of the running frame. and a slide frame that is mounted so as to be movable back and forth and left and right on a horizontal plane, and a depressed portion that is depressed downward and becomes low is formed at both left and right ends of the traveling frame, and a depressed portion of the depressed portion of the traveling frame is formed. The slide frame is mounted on an upper surface, and the slide frame is mounted on the upper surface of the depressed portion of the traveling frame so as to be movable forward and backward, and the front and rear slide portions forming the lower part of the slide frame and the front and rear slides a left and right slide part which is mounted on the side surface of the tower pillar on the top surface of the tower so as to be movable in the left and right direction towards the tower pillar and forms the upper part of the slide frame; and a position above the depressed part of the traveling frame on the top surface of the front and rear slide part. a left and right extension part that is fixed to the left and right slide parts and forms an upper part of the slide frame together with the left and right slide parts; the top surface of the traveling frame, the top surface of the left and right slide parts, and the top surface of the left and right extension part are formed on the same plane; the left and right sides of the running frame; the sides of the left and right extensions on the running frame side and the left and right slide parts; and the sides of the left and right slide parts on the left and right extension parts;
A bridge inspection device characterized in that handrails are fixed to all sides except each side of the bridge.