JPS61270405A - Bridge maintenance apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bridge maintenance device, and is particularly useful for repairing rust on steel materials, peeling of paint, cracks on concrete floor plates, etc. on the lower surface of road bridges or elevated roads. This invention relates to a bridge maintenance device that is used for inspection and repair and has excellent mobility.

Conventional technology 1 Conventionally, in order to perform maintenance on the underside of a bridge, it is common to temporarily erect work scaffolds over a relatively wide area of the underside of the bridge, but from the perspective of reducing temporary construction costs, etc. Maintenance equipment is increasingly required. This type of mobile maintenance device is equipped with an arm that extends downward from the side of the bridge from a vehicle stopped on the road above the bridge, and at the tip of this arm there is an inspection means or workbench installed to perform maintenance on the underside of the bridge. It is known that there is a

In addition, if the maintenance equipment is to be installed immediately on the bridge, a dedicated rail will be installed along the bridge on the underside of the bridge.
It is known that a special inspection vehicle is suspended from this system, and in the case of existing bridges where it is difficult to install special rails, for example, the base of the maintenance device is installed on the railing located at the side end of the bridge. However, a concept has been proposed in which an arm is suspended from the base to below the side of the railing, and an inspection means or a workbench is provided at the tip of the arm to maintain the underside of the bridge.

[Problems to be Solved by the Invention] However, as in the former case, stopping vehicles on a bridge to perform maintenance obstructs traffic and poses problems in areas where detours are not possible, such as on expressways.

Also, as in the latter case, installing the base of the maintenance device on the bridge railing does not have the problem of being affected by the road conditions mentioned above, but the existing railing has problems with its strength, so it is necessary to reinforce it when installing the maintenance device. Moreover, in places where lighting posts or soundproof walls have been installed, it is impossible to install a maintenance device due to the obstructions caused by them, so there is a problem that the scope of its application is extremely narrow.

[Object of the Invention] The present invention was devised in view of the above-mentioned problems, and its purpose is to enable easy movement over a wide range of the underside of a bridge without affecting road conditions. To provide bridge maintenance equipment.

[Summary of the Invention] The present invention provides a main clamp means for removably clamping a bridge girder, a swivel table rotatably supported by the main clamp means, a support frame vertically installed on the swivel table, and a bridge girder attached to the support frame. A work scaffold supported so as to be movable along the horizontal direction below, auxiliary clamping means provided at both ends of the work scaffold and removably clamped to the bridge girder, and an elevating means for moving the work scaffold up and down with respect to the bridge girder. The bridge is equipped with a structure that allows work scaffolding to be moved vertically and horizontally under the bridge girder.

[Example] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, on the lower surface of the bridge, bridge girders 1 are arranged in parallel along the longitudinal direction and at intervals in the width direction. This bridge girder 1 is formed to have a single-shaped cross section, and a flange portion 1a is formed at the lower part thereof to extend on both sides in the width direction. The main bridge maintenance device 2 is this flange part 1.
It is suspended from a pair of bridge girders 1 at point a.

The bridge maintenance device 2 mainly includes a main clamp means 3 that removably clamps the bridge girder 1, a swivel table 4 that is rotatably supported by the main clamp means 3, and a support frame 5 that is vertically installed on the swivel table 4. , a work scaffold 6 supported by the support frame 5 so as to be movable in the horizontal direction below the bridge girder 1;
Lifting means 7 for moving the work scaffold 6 up and down, and the work scaffold 6
It is comprised of a pair of auxiliary clamp means 8 provided at both ends of the bridge girder 1 for removably clamping the bridge girder 1, and a lock means 9 for fixing the work scaffold 6 to the support frame 5. The main clamping means 3 consists of four clamps 3a arranged at the four corners of a swivel base 4 formed in a rectangular shape at intervals, and two clamps 3a facing each other form a pair. The clamp portion 1a of the bridge girder 1 is inserted and clamped from the width direction thereof. These clamps 3a are configured to be attached to and detached from the flange portion 1a by moving forward and backward in the width direction, and this operation is performed by a general screw mechanism or hydraulic cylinder mechanism (not shown). When the main clamp means 3 clamps the bridge girder 1, the swivel base 4 supported directly below the bridge girder 1 is configured to be freely pivotable with respect to the support frame 5. A swivel ring (not shown) that is relatively rotatable around a vertical axis is disposed between the lower part of the swivel table 4 and the ceiling part 5a of the support frame 5 formed in the shape of a frame body, and A worm gear mechanism (not shown) is provided as a mechanism, and by operating this worm gear IIIta, the support frame 5 and the swivel base 4 are rotated relative to each other via a swivel ring. The support frame 5 is formed in the shape of a rectangular parallelepiped, and a girder 5C is interposed between the pillars 5b at the lower part of a pair of opposing side openings. A work scaffold 6 is provided in the support frame 5 by penetrating and extending between the other pair of opposing side openings. This working foot [16] has a handrail 6b installed around it on a base plate 6a, so that a worker can work while riding on the inside of the handrail 6b. Further, on the work scaffold 6, a rail 6C is formed on the side of the platform 6a and extends horizontally along the longitudinal direction thereof.
The working legs 116 are supported such that the rails 6C are sandwiched from above and below by O-rails 5d arranged at the lower part of the pillars 5b of the support frame 5, so that they can move freely relative to the support frame 5.

The O-ra 5d is driven by a wire or the like that is let out and wound up by a winch or the like. A locking means 9 is provided between the support frame 5 and the work scaffold 6, which are relatively movable, for fixing them. The locking means 9 is composed of a locking pin 9a that is provided so as to be freely retractable from the base 1tea in the width direction thereof, and an engagement hook 9b that is rotatably supported at the lower part of the support frame 5. It is set to be fixed. Further, the locking means may be configured by locking by wire tension or by separately installing a brake device.

Further, the support frame 5 is provided with a lifting means 7. The elevating means 7 has one end connected to a rond 5g installed between a cover 5f fixed to a lower column part 5e formed by dividing the pillar 5b of the support frame 5 into two vertically, and the other end connected to the ceiling part 5a. By operating this screw mechanism, the upper pillar portion 5h slides inside the cover 5, and the support frame 5 is expanded and contracted in the vertical direction, and as a result, the work scaffold 6
is designed to rise and fall. Furthermore, auxiliary clamping means 8 are provided at both longitudinal ends of the work scaffold 6. In this embodiment, the auxiliary clamping means 8 includes a straight-travel clamp 8a that clamps the bridge girder 1 when moving straight along the longitudinal direction of the bridge girder 1, and a straight-travel clamp 8a that clamps the bridge girder 1 when crossing between the bridge girders 1.
and a transverse clamp 8b for clamping to the cross section, and these clamps 8a and 8b are arranged 90 degrees out of phase from each other in terms of their functions. Therefore, these clamps 8a,
8b can also be used as one clamp by making it rotatable with respect to the work platform 6. The straight clamp 8a is provided on the support post 8c at a position approximately at the same height as the main clamp means 3, and moves forward and backward in the width direction of the work scaffold 6 to clamp the flange portion 1a of the bridge girder 1. . Further, the crossing clamp 8b is provided on a pedestal 8d provided on the work foot I6 so that it can run along the length of the work scaffold and can be raised and lowered by a hydraulic cylinder mechanism or the like (not shown). It moves forward and backward in the direction to clamp the flange portion 1a of the bridge girder 1. These forward and backward movements are performed by a screw mechanism 8e or the like.

Next, we will discuss how to operate the bridge maintenance equipment.

According to FIG. 2, a state in which the bridge girder 1 moves straight along the longitudinal direction and a cross state in which it moves between the bridge girders 1 will be sequentially explained.

First, state (3) shows a stopped state during maintenance work, and the main clamping means 3 is clamping between the pair of bridge girders 1 to support the work scaffold 6 (indicated by △ in the figure). Particularly during this operation, the support frame 5 and the work platform 6 are fixed by being engaged with the locking means 9.

State ■ is a state in which the vehicle is traveling straight. At this time, first, while the work scaffold 6 is suspended by the main clamp means 3, the elevating means 7 is driven to lower the work scaffold 6 to obtain clearance under the girder. Next, the work scaffold 6 is moved along the longitudinal direction of the bridge girder 1 with respect to the support frame 5, and after a predetermined movement, the entire scaffold 6 is raised by the lifting means 7, and the straight-travel clamp 8a is clamped to the bridge girder 1 (Fig. middle, indicated by B). After the work scaffold 6 is supported at both ends in this way, the main clamp means 3 is removed, and the support frame 5 is then moved relative to the scaffold 6 to a predetermined position, where the main clamp means 3 is clamped to the bridge girder 1. (indicated by C in the figure). Once the main clamp means 3 is engaged, the straight clamp 8a is removed and the lock means 9 is engaged.

Next, state (2) shows the turning movement of the work platform 6 for crossing. This is done by rotating the support frame 5 with respect to the swivel base 4 while the work scaffold 6 is suspended by the main clamp means 3.

The locking means 9 is of course locked. At this time, since the center of gravity of the work scaffold 6 is located almost directly below the main clamping means 3, which is the center of rotation, the generation of moment accompanying the rotation can be almost suppressed.

Next, state ■v indicates a crossing state. While the work scaffold 6 is suspended by the main clamp means 3, the work scaffold 6 is lowered by the elevating means 7, and then the work scaffold 6 is moved to the adjacent bridge girder 1 side and extended, and the crossing clamp 8b is actuated to The bridge girder 1 is approached so as to sandwich it from the width direction, and finally, the work scaffold 6 is raised and the crossing clamp 8b is clamped to the bridge girder 1 (indicated by D in the figure). Here, the work scaffold 6 is supported on both sides by the crossing clamp 8b and the main clamp means 3, and maintenance work between the bridge girders 1 can also be performed at this time.

Next, the main clamp means 3 is removed and lowered, the support frame 5 is moved to the adjacent bridge girder 1, the main clamp means 3 is clamped to the bridge girder 1 again (indicated by E in the figure), and then the crossing clamp 8b is removed. At the same time, the support frame 5 and the work scaffold 6 are fixed by locking means 9.

Finally, by rotating the support frame 5 with respect to the swivel base 4, the same swiveling action as described above (state ①) is achieved, and the work scaffold 6 is positioned along the longitudinal direction of the bridge girder 1 and continues adjacent to it. Maintenance work under the bridge girder 1 can be carried out (state flV).

According to the present invention as described above, the entire lower surface of the bridge can be covered by repeating the work in step 113 above without affecting traffic on the bridge or being obstructed by lighting posts, etc. and can be easily avoided,
Maintenance work can be performed over a wide range of areas.

Another embodiment of the bridge maintenance device 2 is shown in FIG. In this embodiment, instead of raising and lowering the main clamping means, the auxiliary clamping means at both ends can be raised and lowered, and the raising and lowering means 7 is composed of hydraulic cylinder means and the like, and is installed on the support post 8C of the straight clamp 8a. . This prevents devices from becoming densely packed around the support frame 5 and complicating the structure.

[Effects of the Invention] In summary, the present invention exhibits the following excellent effects.

It can be moved appropriately while suspended under the bridge girder, and maintenance work can be carried out over a wide range of areas on the entire underside of the bridge without affecting traffic on the bridge or being blocked by obstacles. be able to.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a preferred embodiment of the bridge maintenance device according to the present invention, FIG. 2 is a plan view showing the operating state of the bridge maintenance device according to the present invention, and FIG. 3 is a perspective view showing a modified example. It is. In the figure, 1 is the bridge girder, 3 is the main clamping means, 4 is the swivel table, and 5
6 is a support frame, 6 is a work scaffold, 7 is a lifting means, and 8 is an auxiliary clamping means. Patent Applicant: Ishikawajima-Harima Heavy Industries Co., Ltd. Representative Patent Attorney: Nobuo Kinutani Figure 2

Claims (1)

[Claims] A main clamping means that is removably clamped to the bridge girder, a swivel base that is rotatably supported by the main clamping means, a support frame that is vertically installed on the swivel base, and a support frame that is attached to the support frame in a horizontal direction below the bridge girder. a work scaffold supported so as to be movable along the bridge; auxiliary clamping means provided at both ends of the work scaffold for removably clamping the work scaffold to the bridge girder; and elevating means for moving the work scaffold up and down with respect to the bridge girder. A bridge maintenance device characterized by comprising: