JPH0532522B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a bridge inspection and repair device used for inspection and repair work on relatively large bridges.

[Prior art]

Traditionally, when inspecting and repairing a bridge, if the area under the bridge cannot be used, a special inspection vehicle is suspended from the bridge, but in this case, it is necessary to partially or completely block off traffic on the bridge. There were problems such as that the inspection scope was restricted. Furthermore, when erecting suspended scaffolding on the bridge, there were problems in that temporary scaffolding and removal of the scaffolding was difficult, the construction period was long, and costs increased.

JP-A-59-130904 and JP-A-59-134206 have been proposed as inventions relating to a bridge inspection and repair device that constitutes a scaffold movably supported on the underside of a main girder of a bridge. However, these devices have the following practical problems.

That is, the lower flanges that constitute the main girder of a bridge girder rarely have a constant width, and the width varies depending on the location depending on the load situation and the planar shape of the bridge. In the joint part, the joint plates are stacked and fixed with rivets or bolts, so the thickness also changes. Further, a stiffener is provided on the side surface of the main girder web so as to be perpendicular to the surface of the web, and the lower end of the stiffener is welded to the lower flange.

Therefore, it is difficult to run the wheels of the known bridge inspection and repair device on the upper surface of the lower flange. Furthermore, in order to solve this problem, it was necessary for the device to separately provide a dedicated rail on the lower surface of the lower flange of the bridge. Furthermore, there may be obstacles on this lower flange, over which it is often difficult to drive. In ordinary bridges, a dedicated rail is rarely provided on the lower surface of the lower flange, so it is difficult to use the above device.

On the other hand, if the area under the bridge can be used, a special inspection vehicle is used from under the bridge, but in this case as well, there are the same problems as when using a dedicated inspection vehicle from above the bridge. When setting up scaffolding under a bridge, there are the same problems as when setting up suspended scaffolding, as well as the problem of having to block off traffic under the bridge.

JP-A-59-134206 proposes a bridge inspection device that moves the bogie frame, but this device uses an inspection vehicle that runs on the bridge in the longitudinal direction of the bridge to move the bogie frame. A suspension device is used in the width direction. This device is an inspection device for wide bridges with many girders, and when inspecting a bridge, it is necessary to close one side of the diagonal line, and it can be moved back and forth using the lower flange. It's not something you do.

[Purpose of the invention]

The present invention has been made in order to solve the problems of conventional bridge inspection and repair work as described above, and is intended to prevent bridges that do not have inspection and repair equipment from being blocked by traffic on or under the bridge. It can be inspected and repaired safely and efficiently without being interrupted.
Moreover, it is an object of the present invention to provide a bridge inspection and repair device that is easy to attach and detach and has low equipment cost.

In particular, the present invention was developed for inspection of bridges that do not have rails for dedicated bridge inspection vehicles, and
This type is suspended from the lower surface of the lower flange of the main girder and moves sequentially along it, making it easy to apply to bridge inspections even on bridges where there are obstacles in the way of wheels running on the lower flange. Another purpose is to provide a repair device.

[Structure of the invention]

To achieve the above object, the present invention includes a plurality of holders disposed directly below a plurality of main girders arranged in parallel constituting a bridge, in the longitudinal direction of the main girders, and a plurality of holders arranged in the longitudinal direction of the main girders; It consists of a truck frame supported movably in intersecting directions, and the holding body has a hollow part provided in the longitudinal direction, an opening opening in a straight line above the hollow part, and a hollow part inside the hollow part. two shafts fixed to the inserted connecting member at intervals and protruding from the opening; a shaft on the holding body with one end fixed in the vicinity of the opening; a first holding device provided on the shaft; and a second holding device provided on the shaft, the holding device being engaged with and supported on the upper surface of the lower flange of the bridge. a pantograph-type link mechanism that expands and contracts in the width direction of the lower flange a link whose lower end is pivotally supported by the shaft and whose upper part is swingably supported; and a connecting member provided with the shaft. and a drive device that moves the holding body in the longitudinal direction, and the first holding device and the second holding device are operated alternately to grip the lower flange with either holding device, and the drive device is operated. The present invention proposes a bridge inspection and repair device configured to move the holding body intermittently along the lower flange, and further move the bogie frame in a direction intersecting the holding body.

That is, in the present invention, a cart on which a worker rides is suspended and supported from a lower flange of a main girder extending in the longitudinal direction of a bridge. A holder is suspended from a plurality of lower flanges arranged in parallel, and the bogie frame is supported between the holders so as to be able to move laterally.

This holding body has a first holding device consisting of a pantograph-type link mechanism fixed on the holding body, and a second holding device of a similar configuration that moves in the longitudinal direction with respect to the holding body. have. These holding devices are adapted to grip or release the lower flange of the main girder provided at the lower part of the bridge.

Then, by alternately operating the gripping device provided on the first holding device and the gripping device provided on the second holding device, and moving the second holding device back and forth with respect to the holding body. The system gradually moves the bogie relative to the bridge.

Therefore, according to the bridge inspection and repair device according to the present invention, it is possible to safely move the holder supporting the bogie frame with respect to the lower flange of the main girder constituting the bridge gradually, as if moving an inchworm. This is possible.

〔Example〕

Hereinafter, an embodiment of the bridge inspection and repair apparatus according to the present invention will be described with reference to FIGS. 1 to 10.

Figure 1 is a front view of bridge inspection and repair equipment A, Figure 2 is a view taken along arrow A-A in Figure 1, and Figure 3 is B-- in Figure 1.
It is a view from arrow B.

The bridge inspection and repair device A is provided movably along the axial direction (longitudinal direction) of the bridge R, and is mounted on a trolley 1.
A holding body 3 to which a bogie frame 2 is attached, and this holding body 3
a first holding device 4 provided fixed thereon;
A second holding device 5 is configured to approach and move away from the holding device 4 by a drive device.

As shown in FIGS. 4 to 7, the holding body 3 has a hollow portion 6 in the longitudinal direction of the center and a hollow portion 6.
"Guiding part" consisting of an opening 7 that opens above the
is formed, and the wheels 8 provided in the through holes opened at both ends of the holding body 3 move the bogie frame 2 to the fifth position.
It is attached so that it can move in the direction L-L' in the figure.

In the hollow part 6 there is a rack 9 and a wheel 10.
A connecting member 11 is housed therein, and shafts 12 and 12' constituting a second holding device, which will be described later, are fixed to both ends of the connecting member 11, and a rack 9 and a gear 13 meshing with the rack 9 are fixed to both ends of the connecting member 11. It is moved in the direction of arrow D-D' in FIG. 5 by a drive device M that rotates it by a power device (not shown). Therefore, by driving the connecting member 11 back and forth by the drive device M, the second holding device 5 is moved back and forth with respect to the holding body 3.

Both the first holding device 4 and the second holding device 5 are configured as a set of two, and the upper parts of the first holding device 4 and the second holding device 5 are as shown in FIG. A gripping device 16 employing a pantograph mechanism is attached to each of the shafts 17, which constitute the first holding device 4, as shown in FIG.
17' is fixed to the holding body 3, and the second holding device 5
The shafts 12, 12' having upper parts thereof are connected by a connecting member 11.

The gripping device 16 has a wheel 18 at its upper end, as shown in FIGS. T-shaped support rod 21
a second link 25 whose one end is attached to the T-shaped support rod 21 by a pin 23 and the other end is attached to the first link 19 by a pin 24; , one end of the first link 19 is attached by a pin 26 to form a link mechanism and is screwed into the threaded part of the shaft 17, and the gear 3
A pantograph-type link mechanism is constituted by a strut support 28 that moves up and down along the shaft 17 by rotating the shaft 3 with a power device via a drive gear 27.

By moving this strut support 28 up and down, the lower flange 2 of the main girder is connected to the hook 22.
9 to be gripped or released. Although the first holding device 4 has been described in FIGS. 8 and 9, the second holding device 5 is also provided with a similar gripping device 16. Also,
In FIG. 3, 30 indicates the pavement of the bridge R, 31 indicates the floor plate, and 32 indicates the main girder web.

In the above configuration, when the bridge inspection and repair device A is currently suspended by gripping the lower flange 29 of the bridge R by the gripping devices 16, 16' in the state shown in FIG. 10a, the first The gripping device 16 of the holding device 4 is released (white circle), and the weight is transferred to the second
With the load being placed on the gripping device 16' side of the holding device 5, the holding body 3 is advanced as shown by arrow E to bring it into the state shown in FIG. 10b. and the first holding device 4
The gripping device 16 grips both sides of the lower flange 29 (black circles).

Thereafter, the gripping device 16' of the second holding device 5 is released, and the connecting member 11 is moved in the direction of arrow E' by the drive device M consisting of the rack 9 and gear 13 in FIG. 16' to fix this second holding device 5 (FIG. 10c).

In this way, the working trolley 1 attached to the holder 3 can be moved in the direction of arrow E, that is, in the longitudinal direction of the bridge R.

〔Effect of the invention〕

The bridge inspection and repair device according to the present invention includes a plurality of holders 3 arranged in the longitudinal direction of the main girders 32 directly under the plurality of main girders 32 arranged in parallel forming the bridge R, It consists of a truck frame 2 supported movably in a direction intersecting the holding body 3, and the holding body 3 has a hollow portion 6 provided in its longitudinal direction.
, an opening 7 that is linearly opened above the hollow part 6 , and a connecting member 1 inserted into the hollow part 6 .
two shafts 12, 12' fixed to the holder 3 at intervals and protruding from the opening 7; a shaft 17, one end of which is fixed on the holder 3 near the opening 7; 17', a first holding device 4 provided on the shafts 17, 17', and a second holding device 5 provided on the shafts 12, 12', the holding devices 4, 5 having It has a hook 22 at its tip that is engaged with and supported by the upper surface of the lower flange 29 of the bridge R, the lower end is pivoted to the shafts 12, 12', 17, 17', and the upper part is swingable. A pantograph type link mechanism configured to expand and contract the link 19 supported by the lower flange 29 in the width direction of the lower flange 29, and the connecting member 11 provided with the shafts 12, 12' are attached to the holder 3.
drive devices 13 and 9 for moving the first holding device 4 and the second holding device 5 in the longitudinal direction.
The lower flange 29 is gripped by either of the holding devices 4, 5 by alternately operating the driving devices 13,
9 is operated to move the holder 3 intermittently along the lower flange 29, and further move the truck frame 2 in a direction intersecting the holder 3.

Therefore, according to the present invention, the bogie frame 2 supported by the holder 3 can be moved intermittently and safely along the main girder 32 of the bridge R.

In particular, the device of the present invention has pantograph-type gripping devices 16 and 1 that hold both edges of the lower flange 29 of the main girder 32.
6' and intermittently move the holding frame 3 via the drive device M, so the width of the lower flange 29 may change, and the thickness may change due to the presence of a contact plate, bolts, etc. Furthermore, even if stiffeners are installed, the bridge can be moved without any problems and the back side of the bridge can be inspected.

Since the device of the present invention grips the lower flange 29 of the bridge R and moves along it, there is no need to block traffic below the bridge R, erect scaffolding, or install special rails on the bridge. Therefore, the bridge R can be easily inspected and repaired.

Since the device of the present invention has an extremely simple structure, it can be manufactured in a small size and at low cost, and yet can cover a wide range of areas for inspection and repair work.

[Brief explanation of the drawing]

The figures show an embodiment of the bridge inspection and repair device according to the present invention, in which FIG. 1 is a front view of the bridge inspection and repair device, FIG. 2 is a view taken along arrow A-A in FIG. 1, and FIG. is a view taken along the line B-B in FIG. 1. Fourth
5 is a plan view thereof, FIG. 6 is a view taken along the line CC in FIG. 5, and FIG. 7 is a view taken along the line DD in FIG. 5. FIG. 8 is a front view of the gripping device, FIG. 9 is a side view thereof, and FIGS. 10 a to 10 c are explanatory views of the operation of the device according to the present invention. 1... Cart, 2... Cart frame, 3... Holding body, 4
...First holding device, 5...Second holding device, 6
...Hollow part, 7...Opening part, 8, 10, 18...
Wheel, 9... Rack, 11... Connecting member, 12,
17... shaft, 13... gear, 16... gripping device,
19...first support material, 20, 23, 24, 26...
... Pin, 21 ... T-shaped support rod, 22 ... Hanging tool, 25 ... Second support member, 27 ... Drive gear, 2
8...Strut support, 29...Lower flange of main girder,
30...paving, 31...floorboard, 32...main girder web.

Claims (1)

[Claims] 1 A plurality of holders 3 arranged in the longitudinal direction of the main girders 32 directly under the plurality of main girders 32 arranged in parallel constituting the bridge R, and the holders 3
A bogie frame 2 supported movably in a direction intersecting the
The holding body 3 includes a hollow portion 6 provided in the longitudinal direction thereof, an opening portion 7 opening linearly above the hollow portion 6, and a connecting member 11 inserted into the hollow portion 6. two shafts 12, 12' fixed at a distance from each other and protruding from the opening 7; and shafts 17, 17, one end of which is fixed on the holder 3 in the vicinity of the opening 7. ', said shaft 17,
17', and a second holding device 5 provided on the shafts 12, 12', the holding devices 4, 5 are attached to the upper surface of the lower flange 29 of the bridge R. A hook 22 that is engaged with and supported by
at the tip, and the shafts 12, 12', 17, 1
a pantograph-type link mechanism configured to expand and contract a link 19 whose lower end is pivotally supported at 7' and whose upper part is swingably supported; and the shafts 12, 12. The first holding device 4 comprises a driving device 13,9 for moving the connecting member 11 provided with a
and the second holding device 5 are operated alternately to grip the lower flange 29 with either of the holding devices 4, 5, and at the same time, the driving devices 13, 9 are operated to move the holding body 3 along the lower flange 29. Move intermittently, and then move the trolley frame 2
A bridge inspection and repair device configured to move in a direction intersecting a holding body 3.