JP2001172920A - Work scaffolding for existing bridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tentatively installed work scaffolding that is used when maintaining and inspecting a pedestrian overpass or a passengers' overpass, does not require any traffic regulation above and below a bridge, can be safely erected or eliminated, and has improved working efficiency. SOLUTION: A work scaffolding 10 is detachably gear-locked to the side part of a bridge body, and is composed of a number of gear-lock iron goods 20 with a roller support for receiving a horizontal rod, and a number of unit work benches that are extended and suspended at the side outside of the bridge body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a working scaffold of an existing bridge temporarily installed for inspection, maintenance and repair of a road bridge, a railway bridge and the like.

[0002]

2. Description of the Related Art Bridges with a large height above ground, such as mountain roads and the Honshu-Shikoku Bridge, and bridges that are erected on water such as rivers and the sea are permanently used for maintenance, inspection, painting, and repair work. A scaffold / work table that can move under the bridge over the entire span is provided as equipment.

In recent years, peeling and falling of concrete has become a problem due to partial deterioration of concrete structures.
Particularly, in the case of an overpass or an overpass that crosses an expressway or a bullet train, the influence of the debris on the traveling vehicle is significant, and it is necessary to inspect and repair the vehicle in advance to eliminate concerns.

[0004] However, providing permanent work scaffolds on these relatively small bridges leads to increased costs, and it is economically difficult to install them over all bridges. Therefore, to carry out periodic inspections and to carry out early repairs and maintenance as needed, temporarily build a work scaffold or use an aerial work vehicle or the like Visual inspection is being carried out from the bridge. Construction of such work scaffolds, installation of aerial work vehicles, etc. are performed when the traffic volume of the target overpass or overpass is small and traffic can be easily stopped or vehicle regulation can be performed, or under roads and tracks under bridges There is no problem under conditions such as there is no obstacle to the regulation, but there is a problem under heavy traffic.

[0005]

SUMMARY OF THE INVENTION The present invention solves such a problem, and it is not necessary to stop traffic of an overpass or an overpass or restrict traffic of vehicles, and furthermore, to restrict traffic such as an expressway under the bridge. It is an object of the present invention to provide a temporary work scaffold that can be safely removed and has good workability without requiring regulation of train and train operation.

[0006]

According to the present invention, there is provided a locking portion which is detachably locked on a side of a bridge body, and a horizontal bar along a bridge shaft is movable in a bridge axis direction on a laterally outer portion of the bridge body. A number of locking hardware provided with a support portion for supporting the locking hardware, a number of unit worktables having a horizontal bar supported by the supporting portion of the locking hardware, and extending and suspended from the lateral outside of the bridge body, A working scaffold for an existing bridge, comprising a connecting member for connecting the unit working tables to each other. Since there is a railing on the side of the bridge body, an inverted U-shaped locking metal which is put on the railing from above can be detachably locked. A large number of the locking hardware are sequentially locked on the railing of the bridge body. The locking hardware has a horizontal bar support for suspending the horizontal bar of the unit work table outside the side surface of the bridge body, and the unit work table is movably hung along the side surface of the bridge body. The unit workbench has a horizontal bar mounted on the upper part, and a work scaffold plate is mounted on a frame suspended from the horizontal bar. A scaffold is formed on the side of the bridge.

Further, on the work scaffold, the unit work table is extended and suspended on both sides of the bridge body, and rails are respectively suspended from the lower ends of both work tables in parallel with the bridge axis, and both ends are hung on the rail. A work scaffold characterized by being suspended from a suspended work table that moves in the bridge axis direction below the bridge body. This scaffold is suitable because the entire lower surface of the bridge can be inspected and repaired.

[0008] The work scaffold of the present invention is erected as follows. First, the metal fittings are locked from the end of the bridge body which does not hinder normal vehicle traffic to the railing of the bridge body. 1 to be the scaffold tip
The tip of the horizontal bar of the unit work table is fitted to the support of the latch hardware, the work table is advanced and supported, and then the next latch hardware at the advanced position from the unit work table is removed. The first unit workbench is engaged with the rear end of the horizontal bar of the first unit workbench, and the front end of the horizontal bar of the second unit workbench is fitted and supported forward. The locking of the locking hardware at the forward position and the forward connection of the unit worktable are repeated. In this way, a temporary repair scaffold can be erected. When the inspection and repair are completed, the scaffold can be dismantled and removed by reversing the above method. ADVANTAGE OF THE INVENTION According to this invention, assembling and disassembly of a work scaffolding becomes possible while ensuring the traffic of the bridge up and down, which is suitable.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. The present invention is an example in which an inspection and repair of an overpass 100 built on an expressway 105 as shown in FIG. 8 is performed. Overpass 10
0, the locking hardware 20 is locked to the rail 101 from one end,
The unit work table 30 is suspended from the unit work table 30, the locking of the locking hardware 20, the suspension of the unit work table 30, the forward movement,
The connection of the unit worktables was repeated, and the work scaffold 10 was erected. For vehicles traveling at high speed on a highway 105, falling objects (such as concrete pieces) can have serious consequences, and the work platform 10 is completely protected by seats.

FIG. 1 is a front view of a working scaffold 10 of an embodiment.
FIG. 2 is a side view. The work scaffold 10 includes a lock hardware 20, a unit work table 30, and a connecting member 50. FIG. 3 shows an example of the locking hardware 20. The locking hardware 20 has an inverted U-shaped locking portion including a back plate 21, a top plate 22, and a support plate 23. The locking portion can be freely disengaged by covering the railing from above. Bracket 2 on the outer surface of support plate 23
4 and 26, receiving rollers 25 and 27
Is provided. In FIG. 3, the receiving rollers 25 and 27 are configured such that a horizontal bar is inserted between each pair of rollers. The two pairs of receiving rollers 25 and 27 are provided to support the horizontal force and the vertical force of the suspended object (unit work table) by supporting two horizontal bars. The structure, arrangement, and the like of the receiving roller are not limited to the above, but may be any as long as the suspended object is supported movably in the bridge axis direction and securely held.

The unit work table 30 is a suspended object having horizontal bars 38, 39 at the upper end of the side frame 31.
2, a lower frame 34 and a reaction frame 35, and a reaction force roller 37 is provided at the tip of the reaction frame 35 to abut on the lower surface of the slab 103 of the bridge body 100. In addition, a side protection sheet 33 and a scaffold plate 36 are provided to protect falling objects and the like from falling.

FIG. 4 is a side view of the unit workbench 30. On the horizontal bars 38, 39 of the unit work table 30, connection insertions 41, 42 and connection receiving ports 43, 44 are formed, and the horizontal bars 38, 39 of the adjacent unit work table 30 are formed.
39 can be fitted and connected.

FIG. 5 is a side view of the connecting member 50. The connecting member 50 has a function of sealing the gap between the connected unit working tables 30 and locking the horizontal bar from coming out. Locking pieces 52 and 53 are attached to the side of the main body 51 of the connecting member 50.
Are locked by connecting member locking portions 45 and 46 provided on both sides of the unit work table 30 to connect the unit work tables 30 to each other.

As shown in FIG. 1 and FIG. 2, a plurality of locking hardwares 20 are locked on the rail 101, and the locking hardware 20 is fitted between opposed rollers (supporting portions) having a guide structure. The horizontal bars 38, 39 are supported. FIG. 2 shows a state in which a plurality of unit worktables 30 are connected via a connecting member 50. The horizontal bars 38 and 39 of the adjacent unit work tables 30 are fitted and connected to each other, and the adjacent unit work tables 30 are connected to each other via a connecting member 50.

Since the locking hardware 20 is small and lightweight, it can be easily engaged and disengaged from the rail 101 with human power. Further, the unit work table 30 suspended from this is made of an L-shaped aluminum alloy having a unit length of 1.5 m and made of a lightweight,
Protective sheet 3 for catching falling objects such as concrete pieces
3. The scaffold plate 36 is stuck. The support portion of the locking hardware 20 supports the horizontal bar between the opposing rollers having a guide structure so as to be horizontally movable. The horizontal bars 38 and 39 of the unit work table 30 are inserted and fitted into the support portion between the rollers from the side and supported. Receiving rollers 25, 27 of this locking hardware 20
Serves as both a support for the unit work table 30 and a travel guide.

FIGS. 6 and 7 are views of a suspension worktable 60 which is suitable when the inspection and repair of the lower surface of the bridge body is required. FIG. 6 is a front view, and the suspension work table 60 is provided at the lower end of the unit work table 30 suspended on both sides of the bridge.
And hang it. The suspension worktable 60 is configured to be able to move back and forth in the bridge axis direction by rails 47 and rollers 62 of the suspension device. FIG. 7 is a side view of the suspension worktable 60. It comprises a rail 47 suspended from the lower end of the unit worktable 30, and two rollers 62 that hold and suspend the rail 47.

FIG. 8 is a side view and an assembly explanatory view of the work scaffold 10 assembled on the overpass to be inspected. The order in which the scaffold is assembled without violating the limit of the traveling road surface indicated by the traveling limit line 107 of the highway 105 is shown.

First, a work yard is prepared on a road shoulder on the side end of the bridge body 100 outside the traveling road, and the required number of unit work tables 30, connecting members 50, and locking hardware 20 required for the length of the bridge body 100 are transported. And then bring it in. Next, 2
It locks to the individual column 101. Since the locking hardware 20 is lightweight, it may be manually locked using a ladder or the like. Subsequently, the first unit workbench 30 is lifted using a high-altitude work vehicle or a small truck crane if the work yard has room. If you can't afford it, you can do it manually. The horizontal bars 38, 39 of the unit worktable 30 are laterally located between the guide rollers of the locking hardware 20 locked to the rail 101.
Is fitted and advanced. Next, the subsequent unit work table 30 is connected via the lifting connection member 50. Thereafter, a worker is boarded on the unit worktable 30 at the tip, the third locking hardware 20 is suspended on the high rail 101, and the connection of the unit worktable 30, the locking of the locking hardware 20, and the forward movement are repeated. A temporary scaffold 10 having a predetermined length is erected. In this case, if it is possible to temporarily use the overpass 100, the unit workbench 30 and the connecting member 50 may be suspended from the bridge.

If the reverse process of the assembling method described in the description of FIG. 8 is performed, the scaffold can be dismantled and removed without invading the travel limit line 107 as in the assembling.

FIG. 9 is a side view of a scaffold provided with a suspending work table 60. Although the suspension work table 60 slightly violates the running limit, it is necessary to provide a traffic restriction section 65 in advance.

In the above embodiments of the present invention, an example of a bridge over an expressway has been described. However, the present invention is not limited to this. For example, on a railway such as a bullet train, a structure such as a normal road bridge is used. It is possible to appropriately change the unit work table or the locking hardware having a shape according to the type.

FIG. 10 shows a pier 1 of a bridge body 100 such as a highway.
04 shows an example of the work scaffold 10 for performing inspection and repair.
FIG. 11 is a view taken in the direction of arrows AA. Pier 1
The locking hardware 20 is locked on both side surfaces of the locking member 04. For example, a connecting hardware for connecting the left and right locking hardware 20 may be provided on the upper surface of the pier 104, and the left and right locking hardware 20 may be connected to the connecting hardware. As shown in FIG. 10, the unit workbench 30 and the connecting member 5
0 is lifted up as shown by an arrow 56 and suspended on the latch hardware 20 while being sequentially connected in the same procedure as shown in FIG. In this way, the work scaffold 10 of the existing bridge of the present invention is provided.
Can also be applied to inspection and repair of the pier 104.

[0023]

According to the present invention, in the case of inspection and repair of an existing overpass or overpass constructed on a route where traffic regulation or operation regulation is difficult, such as a highway or a railway, the bridge can be used on a railing of a bridge body. A plurality of latches that are detachably latched, and a plurality of worktables that are supported by a horizontal bar that fits into the guide structure of the latches and that are extended and suspended outside the bridge body are united and provided. Therefore, inspection and repair of the bridge can be performed without traffic regulation. Further, the workbench is extended and suspended on both sides of the bridge body, and rails are suspended at the lower ends of both worktables in parallel with the bridge body,
It is preferable to provide a suspension work table which is suspended at both ends of the rail and moves the lower surface of the bridge body back and forth so that the entire lower surface of the bridge body can be inspected and repaired.

Further, this work scaffold locks a metal fitting having a guide structure from the end of the bridge body that does not hinder the traffic of the vehicle to the railing of the bridge body, and the level of the first work table serving as the end of the scaffold. The tip of the rod is fitted into the guide structure of the locking hardware, the work table is advanced and supported, and then the next locking hardware at the advanced position is locked with the hand of an operator from the work table, The tip of the second workbench horizontal bar is fitted to the rear end of the workbench and supported forward, and the locking of the forward position locking hardware and the connecting forward movement of the unitized workbench are repeated. When completed, the above-described method can be reversed to dismantle and remove the scaffold, and it is possible to assemble and disassemble the work scaffold while securing the traffic of the upper and lower bridges. Furthermore, due to the partial deterioration of the bridge body, it is possible to check the concrete peeling and dropping in advance and repair it without installing permanent equipment. Not only does regulation become unnecessary, but there is no need to stop traffic or vehicles, and the effect of improving convenience and safety is enormous.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment.

FIG. 2 is a side view of the embodiment.

FIG. 3 is a perspective view of a locking hardware.

FIG. 4 is a side view of the working table of the embodiment.

FIG. 5 is a side view of the connection tool of the working table of the embodiment.

FIG. 6 is a front view of another embodiment.

FIG. 7 is a side view of another embodiment.

FIG. 8 is an explanatory diagram of use of the embodiment.

FIG. 9 is an explanatory diagram of use of the embodiment.

FIG. 10 is an explanatory diagram of an application example of the present invention.

FIG. 11 is a view taken in the direction of arrows AA in FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Working scaffolding 20 Locking metal 21 Back plate 22 Top plate 23 Support plate 24 Bracket 25 Receiving roller 26 Bracket 27 Receiving roller 30 Unit work table 31 Side frame 32 Reinforcement material 33 Protective sheet 34 Lower frame 35 Reaction frame 36 Scaffolding plate 37 Reaction force roller 38, 39 Horizontal bar 41, 42 Horizontal bar connecting portion 43, 44 Horizontal bar connection socket 45, 46 Connecting member locking portion 47 Rail 50 Connecting member 51 Connecting member main body 52, 53 Locking piece 60 Suspended work table 61 Frame 62 Suspension Roller 65 Traffic Restriction Cross Section 100 Bridge 101 Railing 102 Protective Wall 103 Slab 104 Pier 105 Expressway 106 Bridge End 107 Running Limit Line

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takashi Kaneko 3-4-1 Marunouchi, Chiyoda-ku, Tokyo F.S. Ltd. F-term (reference) 2D059 EE02 EE10 GG39

Claims (2)

[Claims] A bridge is provided with a locking portion which is detachably locked on a side portion of the bridge body, and a support portion is provided on an outer side portion of the bridge body to support a horizontal bar along a bridge shaft so as to be movable in a bridge axis direction. A number of locking hardware, a plurality of unit working tables which are provided with horizontal bars supported by the supporting portions of the locking hardware, and are extended from the side of the bridge body and suspended therefrom, and the unit working tables are interconnected. A working scaffold for an existing bridge, comprising: 2. The unit work table is extended and suspended on both sides of a bridge body, and rails are respectively suspended from both lower ends of the work tables in parallel with a bridge axis, and both ends are suspended by the rails. The work scaffold for an existing bridge according to claim 1, wherein a suspended work table that moves downward in the direction of the bridge axis is suspended.