JPH0447751B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a bridge maintenance device for inspecting the underside of a bridge body, removing rust, repainting, etc. This invention relates to bridge maintenance equipment.

[Technical background of the invention and its problems] Steel bridges on expressways and the like need to be inspected and repaired for peeling of paint, rust, etc. on the underside of the bridge body.

Traditionally, when maintaining a bridge, scaffolding is erected on the underside of the bridge body, but the work of erecting and removing the scaffolding is difficult. For this purpose, running rails are attached to both sides of the bridge body along the longitudinal direction of the bridge body, and a front and rear running frame is provided so as to be movable along the running rail by spanning the front and rear running rails. A bridge maintenance device has been proposed in which a traversing pedestal is provided that can freely traverse along the traversing pedestal, and a work platform that can be raised and lowered is provided on the traversing pedestal. In this device, the work platform can be moved all over the underside of the bridge body by moving the front and rear traveling trestles in the longitudinal direction and moving the traversing trestle in the lateral direction to perform repair and inspection. It can only travel on the underside, and when moving to the next span, it is necessary to move the equipment using a crane or the like.

However, the method of moving from a bridge using a crane, etc. involves road traffic closures and regulations, and there are lighting poles and information board mounting pillars on the side of the road, so it is necessary to suspend the bridge from the road and move it to the next span. There are also problems such as the inability to use cranes on railway bridges.

[Object of the Invention] An object of the present invention is to provide a bridge maintenance device that can freely climb over bridge piers.

[Summary of the Invention] The present invention includes front and rear running rails attached to both sides of a bridge body, a front and rear running frame that is detachably spanned between the front and rear rails, and is movable in the front and rear directions along the rails. , a bridge maintenance device comprising a transverse pedestal movably provided along the longitudinally traveling pedestal, and a work platform provided on the transverse pedestal so as to be movable up and down; The device is characterized in that a U-shaped cross-over frame with legs is provided, and on the other hand, a plurality of telescopic legs are provided on the front and back traveling base, and wheels for traveling on the cross-over base are provided at the tips of the legs, and one After completing the maintenance of the span, raise the legs of the front and rear travel platforms, remove the front and rear travel platforms from the front and rear travel rails, and use the wheels at the tips of the legs to travel on the overpass platform to move to the next span. This is what I did.

[Embodiments of the Invention] Hereinafter, a preferred embodiment of the bridge maintenance device according to the present invention will be described based on the accompanying drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a bridge body supported on bridge piers 2, which is composed of a floor plate 3 serving as a road and a support girder 4 that supports the floor plate 3.

On both sides of this support girder 4, that is, on the side surfaces of the main girder 4a with a box-shaped cross section, face plates 5 with an I-shaped cross section are provided.
is provided in advance, and this face plate 5
Front and rear running rails 7 are suspended along both sides of the bridge body 1 via a rail suspension device 6.

As shown in FIGS. 4 and 5, this rail suspension device 6 includes a face plate gripping mechanism 8 that grips the face plate 5, a rail gripping mechanism 9 that grips the front and rear running rails 7, and both gripping mechanisms 8, 9. It consists of a vertical adjustment mechanism 10 that is connected to each other and adjusts the height of the front and rear running rails 7, and a left and right adjustment mechanism 11 that is attached to the face plate 5 and adjusts the gripping position of the face plate gripping mechanism 8.

The face plate gripping mechanism 8 has lever members 13 pin-coupled to both sides of the support member 12, a gripping portion 14 at the tip of the lever member 13 that engages with the face plate 5, and a lever member 13 between the lever members 13. A locking member 15 is provided to allow the lever members 13 to be opened and removed from the face plate 5 and to secure the lever members 13 together.

The rail gripping mechanism 9 includes a support member 16 and four lever members 17 pin-coupled to the support member 16.
The lever member 17 has a roller 18 at its lower end for suspending the front and rear traveling rail 7. In addition, the lever member 17 is connected to the front and rear traveling rails 7.
A locking pin 19 is provided for removing the roller 18 from the roller.

The left/right adjustment mechanism 11 is composed of a screw jack, and is connected to the gripping part 13 of the face plate gripping mechanism 8 so that the gripping part 13 can be attached to the face plate 5.
to adjust the left and right positions of the front and rear traveling rails 7.

The vertical adjustment mechanism 10 consists of a nut with a right-hand thread and a left-hand thread, and adjusts the height position of the front and rear traveling rail 7 by rotating the nut.

When suspending the front and rear running rails 7 using the rail suspension device 6, if the face plate 5 is pre-installed on the main girder 4a as described above, it will be installed as described above, but if the face plate 5 is not installed, As shown in the main girder 4a on the right side of FIG. 3, an L-shaped metal fitting 20 is attached to the main girder 4a, and the front and rear running rails 7 are suspended using this metal fitting 20. In this case, the face plate gripping mechanism 8 on the upper part of the rail suspension device 6 is removed, and the vertical adjustment mechanism 10 is attached to the metal fitting 20.

As shown in FIG. 5, the front and rear running rails 7 can be sequentially connected in the longitudinal direction by flanges 21. A front and rear traveling frame 23 is movably spanned over the front and rear traveling rail 7 via a front and rear traveling frame suspension device 22.
This front and rear traveling frame suspension device 22 is shown in FIGS. 4 and 5.
As shown in the figure, a roller 25 that engages with the running rail 7 is provided at the upper inner side of the support plate 24 provided so as to sandwich the front and rear running rail 7, and a roller 25 that engages with the running rail 7 is provided at the lower part of the support plate 24.
Upper rail 2 for traversing provided on the front and rear traveling frame 23
The upper roller 25 allows the front and rear traveling frame 23 to move freely along the front and rear travel rail 7, and the lower roller 27
The front and rear traveling frame 23 is supported movably along its length. This front and rear traveling frame suspension device 2
2 has a longitudinal drive device 28 for moving the longitudinal traveling frame 23 along the longitudinal running rail 7, and a traversing drive device 29 for moving the longitudinal traveling frame 23 in its length direction.

The front-rear travel drive device 28 includes a rack 30 attached to the lower surface of the front-rear travel rail 7 and a pinion 31 that is supported between the support plate 24 and meshes with the rack 30.
and an electric motor 32 that rotates the pinion 31. The traverse drive device 29 includes a rack 33 provided on the upper surface of the traverse upper rail 26 of the front-rear travel frame 23, a pinion 34 that meshes with the rack 33, and an electric motor 36 that rotates the pinion 34 via a gear device 35. It consists of

In addition, the front and rear traveling frame suspension device 22 has an upper roller 25
It is configured such that it can be removed from the front and rear running rails 7 as appropriate by pulling out the shaft and removing the upper rollers 25.

A lower rail 37 for traverse is provided at the lower part of the front and rear traveling frame 23, and as shown in FIGS. 2 and 8, a traverse mount 38 is provided so as to be able to freely traverse along this lower rail 37. In other words, the transverse mount 3
A roller 40 that engages with and slides on the lower rail 37 is supported on the lower rail 37 via a support 39. Further, on the traversing pedestal 38, a traversing pedestal driving device 41 for causing the traversing pedestal 38 to traverse is provided. This traversing frame drive device 41 is composed of a rack 42 provided on the lower rail 37, a pinion 43 that meshes with the rack 42, and an electric motor 45 that rotates the pinion 43 via a gear device 44.

Transverse mounts 3 on both sides of the front-rear travel mount 23 in the front-rear direction
A workbench 47 is provided on the platform 8 via a lifting device 46. As shown in FIG. 8, this elevating device 46 has a plurality of cylindrical bodies 48 fitted one after another, a lifting winch 49 is provided on the side of the cylindrical body 48, and a wire wound around the winch 49 is attached to the cylindrical body 48. By winding the wire with a winch 49, the cylindrical body 48 is expanded or contracted in a telescopic shape, and the work table 47 above it is raised and lowered.

A rail assembly crane 50 for attaching or detaching the front and rear traveling rails 7 to the side surface of the bridge body 1 is provided on one side of the workbench 47. This crane 50 includes a boom 52 that is pin-coupled to a rotary workbench 51 that is rotatably provided on a workbench 47.
(inverted Y-shape), an electric screw cylinder 53 installed on the rotating workbench 51 to raise and lower the boom 52, and a wire 5 installed at the tip of the boom 52.
4 and a hoist 55 for suspending the front and rear traveling rails 7. Rotating workbench 51
By turning the turning handle 56, the gear device 57 is rotated and the rotating workbench 51 is rotated. Further, wheels 58 for rotational movement are provided on the lower surface of the rotating workbench 51, and the outer circumference thereof is covered by a lifting prevention guide 59 provided on the workbench 47.
This prevents it from lifting. A handrail 60 is provided on the rotating workbench 51. Also workbench 4
7 is provided with a sliding work floor 61 that can be freely stored. A handrail 62 that can be removed and attached is provided on the sliding work floor 61.

On the other hand, as shown in FIGS. 1 to 3, a U-shaped crossing frame 62 is provided on the outer periphery of the pier 2. This cross-over frame 62 is fixed by a support frame 63 and a bracket 64 attached to the upper part of the pier 2 so as to cross each other.

On the other hand, the front and rear traveling frame 23 is provided with a plurality of legs 65 (four in the figure) that can be raised and lowered, and wheels 66 are provided at the tips of the legs 65. Further, as shown in FIGS. 6 and 7, the legs 65 are provided with worm jacks 67 that extend and contract the length of the legs when standing up.
The legs 65 are extended and contracted by operating the handle 68. 7th when handstand with legs 65
As shown by the two-dot chain line in the figure, it is stored on the side of the front and rear traveling frame 23 and fixed with a storage fitting 69. In addition, when standing up, the fixing metal fitting 7 protrudes from the bottom of the front and rear traveling frame 23 to maintain its standing position.
Fixed at 0.

A travel path 71 is formed in the upper part of the overpass frame 62 and extends across the front and rear of the pier 2, and edges 72 are formed on both sides of the path to prevent the wheels 66 from slipping off.

Next, the operation of the present invention will be explained.

When performing maintenance on one span of the bridge body 1, the suspension device 2
2 is run by its front-rear travel drive device 28 to move the front-rear travel pedestal 23 in the front-rear direction,
A transverse mount 38 is placed along the front and rear traveling mount 23,
Maintenance is performed by moving the bridge body 1 to an appropriate position on the lower surface of the bridge body 1 while moving the work platform 47 up and down with the lifting device 46 and moving the work table 47 up and down with the lifting device 46. Maintenance is carried out by placing a worker, an inspection robot, a rust removal robot, a painting robot, etc. on the rotating workbench 51 and performing manual operation, remote control, automatic operation, etc.

In this case, an assembly crane 50 provided on a workbench 47 via a rotary workbench 51 suspends the front-rear travel rail 7 in the front-rear travel direction, and the travel rail 7 is attached using a rail suspension device 6. Similarly, the crane 50 is used to remove the traveling rail 7.

When the maintenance of one span of the bridge body 1 is completed, as shown in FIG.
When the front and rear traveling frame 23 is located on the traveling path 71 of the passing frame 62, the leg 65 is erected at that position as shown in FIGS. 6 and 7. Fix the legs 65.

Next, when the worm jack 67 is driven by the handle 68 and the legs 65 are slightly extended, the load of the front and rear traveling frame 23, etc. is received by the wheels 66 via the legs 65. At this time, the roller 2 of the front and rear traveling platform suspension device 22
5 is in a floating state from the front and rear running rails 7, and in this state, the front and rear running frame suspension device 22 is removed from the front and rear running rails 7.

After removing the traveling frame suspension device 22, by operating the worm jack 67 and retracting the legs 65, the traveling frame suspension device 2 is retracted as shown by the two-dot chain line in FIG.
The upper surface of 2 is lowered to the lower part of the front and rear running rails 7.
In this state, by moving the front and rear traveling pedestals 23, etc. along the overpassing pedestal 65 as shown by the two-dot chain line in FIG. You will have to go around the perimeter and get over it.

After getting over the bridge, the worm jack 67 is operated to attach the front and rear traveling frame suspension device 22 to the front and rear traveling rail 7 again, the legs 65 are turned upside down and stored in the front and rear traveling frame 23, and maintenance of the bridge body 1 is performed.

In this case, the front and rear running rails 7 are connected to the crane 5.
It will be hoisted up at 0 and move forward while adding rails 7 in the running direction. Moreover, if the front and rear running rails 7 are housed in the front and rear running frame 23 by the length of one span, the installation and removal operations thereof will be facilitated. Furthermore, the crane 50 is operated by raising and lowering the boom 52 using the cylinder 53, and by using the hoist 55.
The front and rear traveling rails 7 can be moved up and down, the rotating workbench 51 can be turned, or the traversing drive device 2 can be
By moving the front and rear running frame 23 laterally at 9, the suspended front and rear running rail 7 can be guided to a predetermined position. Further, when attaching the front and rear running rail 7 to the face plate 5 using the rail suspension device 6, the sliding work floor 61 is extended from the work table 47. Furthermore, if the overpass frame 62 is also assembled using the crane 50 or the like, it becomes possible to sequentially travel over several spans simply by first attaching it to the bridge body 1 using a ground crane.

[Effects of the Invention] As is clear from the above detailed description, the present invention exhibits the following excellent effects.

(1) On the outer circumference of the pier, there is a U with crotches at the front and back of the pier.
A cross-over frame is provided in the shape of a letter, and the other front and rear traveling frame is provided with legs that can be raised and lowered, and wheels are provided at the ends of the legs.The legs are erected and the wheels at the ends are used to run on the cross-over frame. can be moved to the next span. Therefore, once it is attached to the bridge body, work can be performed continuously over several spans without being affected by the conditions on the bridge or on the ground.

(2) Since the bridge body can be maintained while freely climbing over the piers, there is no need for the troublesome and dangerous work of installing maintenance scaffolds and equipment for each span using inputs or cranes, which was required in the past. There will be no need to restrict or temporarily stop road traffic due to construction.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the bridge maintenance device of the present invention, Fig. 2 is a side view of Fig. 1, Fig. 3 is a cross-sectional view taken along the - line of Fig. FIG. 5 is a side view of FIG. 4, FIG. 6 is a diagram showing details of the front and rear traveling frames and the passing frame in the bridge maintenance device of the present invention, and FIG. 7 is an enlarged view of main parts of the bridge maintenance device. FIG. 8 is an enlarged view of the main part of FIG. 2. In the figure, 1 is the bridge body, 2 is the bridge pier, 6 is the rail suspension device, 7 is the front and rear running rail, 22 is the front and rear running mount suspension device, 23 is the front and rear running trestle, 38 is the transverse mount,
46 is a lifting device, 47 is a workbench, 62 is a climbing frame, 65 is a leg, and 66 is a wheel.

Claims (1)

[Claims] 1. Front and rear running rails attached to both sides of the bridge body, a front and rear running frame that is removably spanned between the front and rear running rails and can be moved in the front and back direction along the rails, and In a bridge maintenance device equipped with a movably installed transverse pedestal and a work platform that can be raised and lowered on the traversed pedestal, a U-shaped overpass is installed on the outer periphery of the pier, with legs at the front and rear of the pier. A bridge maintenance device comprising: a pedestal; a plurality of telescopic legs are provided on the back and forth traveling pedestal; and wheels for traveling on the crossing pedestal are provided at the tips of the legs.