JPH0678601B2 - Bridge maintenance equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a bridge maintenance device, and particularly to a main part of a road bridge or an elevated road where steel material is rusted, peeled off, or cracked on a concrete floorboard. The present invention relates to a bridge maintenance device that is for inspection and repair and has excellent mobility.

[Prior Art] Conventionally, in order to maintain the lower surface of a bridge, it is general to temporarily construct a work scaffold over a relatively wide area of the lower surface of the bridge, but in order to reduce temporary construction costs, movable maintenance is possible. Equipment is being demanded. In this type of mobile maintenance device, an arm extending from the stopped traveling vehicle to the lower side of the bridge is provided on the road on the bridge, and the tip of this arm is used as an inspection means or a workbench to perform maintenance on the lower surface of the bridge. Those provided with are known.

In addition, if the maintenance device is to be installed on the bridge immediately, install a dedicated rail along the bridge on the lower surface of the bridge,
It is known that a special inspection vehicle is suspended and run on this, and in the case of an existing bridge where it is difficult to install a dedicated rail,
For example, the base of the maintenance device is installed on the balustrade located at the side end of the bridge, and the arm is suspended from the base to the lower side surface of the balustrade. A concept of maintaining the lower surface has been proposed.

[Problems to be Solved by the Invention] However, stopping the traveling vehicle on the bridge for maintenance as in the former case is a problem in a place where traffic is hindered or a detour cannot be made like a highway.

Also, installing the base of the maintenance device on the railing of the bridge like the latter does not have the problem of being affected by the above road conditions, but the existing railing has a problem in its strength and is reinforced when installing the maintenance device. In addition, there is a problem that the range of application is extremely narrow because it is impossible to attach the maintenance device at the place where the lighting post or the soundproof wall is provided because it becomes an obstacle.

The present invention was devised in view of the above-mentioned problems, and an object thereof is to provide a bridge maintenance device capable of moving a lower surface of a bridge over a wide range and easily without affecting road conditions. To provide.

[Means for Solving the Problems] The present invention relates to a work scaffold horizontally provided facing the floor slab lower surface between bridge girders, and a main clamp means provided on the work scaffold and detachably clamped to the bridge girder, A support frame rotatably supported under the work scaffold, a movable frame having a predetermined length supported by the support frame so as to travel and move, and a straight line along the longitudinal direction of the bridge girder provided at both ends of the movable frame. A straight advancing clamp unit that is detachably clamped to the bridge girder and a supplementary clamping means that has a traverse clamp unit that is detachably clamped to the bridge girder when it changes direction by traversing the support frame and crosses between the bridge girders. Lifting means for raising and lowering the auxiliary clamp means to raise and lower the moving frame, and distance between the bridge girders by moving the auxiliary clamp means along the moving frame. It is provided with a space adjusting means adapted to correspond to the separation.

[Operation] To describe the operation of the present invention, first, the main clamp means is clamped to the bridge girder, and the main clamp means is used to support the entire bridge girder maintenance device under the bridge girder. The auxiliary clamp means that is not clamped to the clamp means is lowered below the bridge girder to a height that does not interfere with the bridge girder. Then, the movable frame having the auxiliary clamp means is moved relative to the support frame fixed under the bridge girder by the clamped main clamp means. Next, after the auxiliary clamp means is raised by the elevating means to clamp the straight-movement clamp unit on the bridge girder, the main clamp means is removed from the bridge girder, and the entire bridge maintenance device is supported under the bridge girder by the auxiliary clamp means. In this state, this time, the elevating means lowers the main clamp means, which is not clamped with respect to the auxiliary clamp means clamped on the bridge girder, to the height below the bridge girder. Then, the support frame having the main clamp means is moved relative to the moving frame fixed under the bridge girder by the clamped auxiliary clamp means. Then, the elevating means raises the main clamping means to clamp it on the bridge girder, and then removes the auxiliary clamping means from the bridge girder.

By repeating such an operation, the straight movement along the longitudinal direction of the bridge girder or the width direction of the bridge girder is achieved.

On the other hand, with the auxiliary clamp means removed from the bridge girder and the entire bridge maintenance device is supported by the main clamp means, the support frame is swiveled with respect to the work scaffold to change the direction, and then the transverse clamp unit of the auxiliary clamp means is moved. The entire device moves transversely by appropriate clamping to the bridge girder.

In this way, the device can be moved vertically and horizontally under the bridge girder, and the work scaffold can be moved over the entire surface under the bridge girder together with the movement of the support frame.

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

As shown in FIG. 1, bridge girders 1 are arranged on the lower surface of the bridge in parallel along the longitudinal direction thereof and at intervals in the width direction. This bridge girder 1 is formed in an I-shaped cross section, and a flange portion 1a is formed in the lower portion so as to be expanded on both sides in the width direction.
The bridge maintenance device 2 is suspended on the pair of bridge girders 1 by this flange portion 1a.

The bridge maintenance device 2 is mainly composed of a work scaffold 9 which is horizontally provided so as to face the bottom surface of the deck between the bridge girders 1, a main clamp means 3 which is provided on the work scaffold 9 and which is detachably clamped to the bridge girder 1, and work. A support frame 5 rotatably supported below the scaffold 9, a movable frame 6 having a predetermined length supported by the support frame 5 so as to be movable along the horizontal direction below the bridge girder 1, and a movable frame 6 A pair of auxiliary clamp means 8 provided at both ends of the bridge and detachably clamped to the bridge girder 1.
And an elevating means 7 for elevating and lowering the auxiliary clamp means 8 to elevate and lower the moving frame 6.

The work scaffold 9 is formed in a rectangular shape having a considerable width so as to be bridged between the bridge girders 1, and a hatch 14 communicating with a console box 11 for a worker crew described later is formed on one side thereof. . Then, the worker performs the maintenance work on the work scaffold 9. In particular, this work scaffold 9 is formed at the top of the bridge maintenance device 2 and is arranged closest to the floor slab between the bridge girders 1, so that the worker can directly touch the floor slab to perform the maintenance work. Are being made easier and more efficient.

The main clamp means 3 is provided with a pair of frame members 17 forming a pair of opposite sides of the work scaffold 9 and guided by these frame members 17 so as to be reciprocally movable along the longitudinal direction thereof. Four clamp arms that can be advanced and retracted from the four ends in the width direction of the work scaffold 9 to match the span of the bridge girder 1.
10, a hydraulic cylinder (not shown) that is driven to extend and retract to move the clamp arms 10 forward and backward, the tips of the clamp arms 10 that are folded back to bypass the flange portions 1a of the clamp arms 10. The clamps 12 and 13 are provided at positions facing the tip end and clamp the flange portion 1a of the bridge girder 1 by sandwiching it from both sides in the vertical direction. The clamp 12 at the tip of the clamp arm 10 is formed with a considerable length so that it can be hung on the flange portion 1a of the bridge girder 1 along its longitudinal direction at a considerable distance. On the other hand,
The clamp 13 disposed so as to face the clamp 12 at a position facing the tip of the clamp arm 10 is configured to be movable up and down by a hydraulic jack 15, and with respect to the clamp 12 hung from above the flange portion 1a, The lower flange portion 1a of the web 1b is configured to be sandwiched from below. And, as for these clamps 12 and 13, one clamp 12 has a flange portion 1a.
The length of the clamp 13 is relatively long, and the other clamp 13 clamps the flange portion 1a from below, thereby restraining the moving frame 6 from swinging due to lateral load such as wind. Can be secured. Further, a cushion material 16 such as hard rubber or felt is provided on the clamp surfaces of the clamps 12 and 13 that come into contact with the flange portion 1a.
Even if the clamp surface is pressed against the flange portion 1a, or even if it comes into contact with other parts, it prevents peeling of the paint on the flange portion 1a, etc., and also prevents damage to the contact. There is.

Further, in particular, the clamp arm 10 is folded back toward the forward direction so as to sandwich the flange portion 1a of the bridge girder 1, so that the clamp arm 10 can be hung on the flange portion 1a from the inside between the bridge girders 1 where the work scaffold 9 should be located. It has become. As a result, the required stroke of the clamp arm 10 is maximized at the bridge girder spacing, and the maximum length of the maintenance device 2 can be made as narrow as possible by minimizing the extension length of the frame member 17.

On the other hand, at the center of the work scaffold 9, a support frame 5 is supported below the work scaffold 9, and between the work scaffold 9 and the support frame 5, the support frame 5 with respect to the work scaffold 9 is provided.
Slewing wheel (not shown) that allows relative rotation around the vertical axis
Is provided. The slewing wheel is rotationally driven by a drive motor to rotate the support frame 5 relative to the work scaffold 9.

A console box 11 is provided on the side of the support frame 5. The console box 11 serves as a crew space for the worker when the bridge maintenance device 2 is moved below the bridge girder 1, and ensures the safety of the worker during the movement. Further, in the console box 11, a control panel of the device 2 and the like are installed.

Further, the support frame 5 is provided with a moving frame 6 below the support frame 5. This moving frame 6 is constructed of a truss structure, and has the advantages of a lightweight and rigid structure. An inspection passage 20 is defined by a scaffolding net 18 and a handrail 19 on the lateral side of the moving frame 6. This inspection passage 20
Is secured as a working space for workers when inspecting auxiliary units such as a hydraulic unit and a generator installed on the truss structure side. Also, by using this inspection passage 20,
The floor slab and the like can be visually inspected in a wide range without moving to the work scaffold 9.

Further, the moving frame 6 is provided with a pair of rails 24 horizontally extending along the longitudinal direction on both sides in the width direction of the upper portion thereof. These rails 24 are provided on the support frame 5, and rollers 25 sandwich the rails 24 in the vertical direction, and rollers that sandwich the rails 24 in the width direction.
26 are placed. Further, the moving frame 6 and the supporting frame 5
A wire that is unwound and wound by a winch (not shown) or the like is stretched along the longitudinal direction of the moving frame 6 between and. Then, by driving a winch or the like, the rollers 25 and 26 travel on the rail 24, and the moving frame 6 is guided by the rails 24 and the rollers 25 and 26, and is supported below the bridge girder 1 along the longitudinal direction thereof. It is designed to run relative to the No. 5. On the other hand, the relative movement between the support frame 5 and the moving frame 6 may be restrained by the tension of wires or the like, or the rollers 25 and 26 may be separately provided with a brake device.

A pair of auxiliary clamp means 8 is provided at both ends in the longitudinal direction of the moving frame 6 configured as described above. The auxiliary clamp means 8 mainly includes an auxiliary clamp frame 28 formed by frame-shaped frame materials so as to surround the peripheral side of the moving frame 6 and a pair of pillars of the frame 28. Clamping unit 29 for rectilinear movement, which is provided on the top of an elevating frame 33, which will be described later and is formed in a gate shape from the inside of the frame member 21 along the width direction of the moving frame 6.
And a crossing clamp unit 30. The straight-movement clamp unit 29 includes a clamp arm 10, a hydraulic cylinder, and clamps 12 and 13 which have the same functions as those of the main clamp means 3 described above. The clamp arm 10 moves forward and backward in the width direction of the moving frame 6. It is configured to be clamped to the flange portion 1a when going straight along the longitudinal direction of the bridge girder 1. In particular, the clamp arm 10 is the clamp arm of the main clamping means 3 described above.
Similar to 10, the flange portion 1a of the bridge girder 1 is folded back toward the forward direction so as to sandwich it, so that the necessary stroke of the clamp arm 10 is sufficient at the bridge girder spacing, and the maintenance device 2 The maximum width of can be made as narrow as possible. On the other hand, the crossing clamp unit 30 is U-shaped so as to deviate the flange portion 1a toward the longitudinal direction of the moving frame 6 by shifting the phase by 90 ° with respect to the folded tip end portion of the clamp arm 10 of the straight-moving clamp unit 29. And a clamp arm 31 having a base end rotatably supported on the frame member by a pin and a clamp arm 31 provided on the upper end portion of the clamp arm 31 so as to be hung from above the flange portion 1a. The auxiliary clamp 32 having the same function and the clamp arm 31 are tilted toward the auxiliary clamp frame 28 side, or the frame 28
It is composed of a rotary actuator 22 which is expanded and operated so as to stand upright, and is clamped to the flange portion 1a when traversing between the bridge girders 1.

In particular, the clamp arm 31 prevents the main clamp means 3 from interfering with the bridge girder 1 when the main clamp means 3 as well as the support frame 5 travels relative to the movable frame 6, so that the main clamp means 3 at the time of standing up. It is formed at a height such that the clamp 32 is located at a position higher than the clamp 12.

Further, the frame member 21 forming the pillar of the auxiliary clamp frame 28 forming the auxiliary clamp unit 8 is apparently expanded and contracted to move up and down, and when the main clamp unit 3 is removed and the auxiliary clamp unit 8 is hung, it moves. Elevating means 7 is provided for raising and lowering 6 with respect to the bridge girder 1, removing the auxiliary clamp means 8 and raising and lowering the clamp units 29, 30 with respect to the moving frame 6 when the main clamp means 3 is hooked. Specifically, an elevating frame 33 is provided inside the frame member 21 that constitutes the pillar of the frame 28 so as to be vertically reciprocally movable along the height direction thereof, and the elevating frame 33 provided with the clamp units 29 and 30 at the top thereof. It is composed of a hydraulic cylinder (not shown) arranged inside the frame material 21 constituting the column, and the elevating frame 33 is moved up and down by the expansion and contraction operation of this hydraulic cylinder to move the clamp units 29 and 30. It is designed to be moved up and down relatively to. In particular, the auxiliary clamp frame 28 that accommodates the elevating frame 33 has a lower portion that is substantially aligned with the lower portion of the moving frame 6 so that the vertical height of the maintenance device 2 does not become higher than necessary. There is.

Further, the auxiliary clamp means 8 is provided with the space adjusting means 4. The space adjusting means 4 is a frame 28 for an auxiliary clamp.
Between the rollers 25 and 26, which are provided on the same side and function as the rollers 25 and 26 of the support frame 5 and run on the rail 24, and the auxiliary clamping frame 28 and the moving frame 6, in the longitudinal direction of the moving frame 6. And a drive mechanism such as a wire that is wound around and wound by a winch (not shown).

In this embodiment, only one auxiliary clamp means 8 is provided, but both auxiliary clamp means 8 and 8 may be provided. By driving the distance adjusting means 4, the auxiliary clamp means 8, specifically, the frame 28, is moved and moved with respect to the moving frame 6 by a considerable distance.

Next, the operation method of the bridge maintenance device will be described.

A crossing state in which the bridge girder 1 moves between the straight girder 1 and the bridge girder 1 will be sequentially described with reference to FIG.

First, in the state I, a stopped state during maintenance work is shown, and the main clamp means 3 clamps between the pair of bridge girders 1 to support the entire apparatus 2, and in this state, the worker is on the work scaffold 9. It will be put on and maintenance work will be performed (indicated by A in the figure). During this work, the movement of the moving frame 6 and the supporting frame 5 is restricted.

State II is a straight state. At this time, first, after the straight-movement clamp unit 29 of the auxiliary clamp means 8 is hung (indicated by B in the figure), the elevating means 7 is slightly elevated to remove the main clamp means 3, and then the elevating means 7 is lowered. The moving frame 6 is lowered to make clearance below the girder. Next, the support frame 5 is caused to travel along the longitudinal direction of the bridge girder 1 with respect to the moving frame 6, and after the predetermined traveling movement, the supporting frame 5 and the moving frame 6 as a whole are lifted to move the main clamping means 3 to the bridge girder 1. To clamp (indicated by C in the figure). After supporting the entire device 2 on the bridge girder 1 in this manner, the elevating means 7 is slightly raised to remove the straight-moving clamp unit 29, and then the moving frame 6 is moved relative to the support frame 5 and moved to a predetermined position. Let

Further, when the clamp means 3 and 8 are unhooked, it is necessary to raise and lower the raising and lowering means 7 slightly. Therefore, a hydraulic jack is provided on the main clamp means 3 and the straight-movement clamp unit 29 to raise and lower the clamp 12 itself with a minute stroke. May be. This can facilitate the work.

Next, the state III shows the swinging motion of the support frame 5 and the moving frame 6 for traversing. This is done by rotating the support frame 5 relative to the work platform 9 while the entire device 2 is suspended by the main clamping means 3.
Of course, relative movement between the support frame 5 and the moving frame 6 is restricted. At this time, since the center of gravity of the moving frame 6 is located almost directly below the work scaffold 9 which is the center of turning, generation of a moment associated with turning can be almost suppressed.

State IV then represents the crossing state. While the device 2 is suspended by the main clamp means 3, first, the traverse clamp unit 30 is raised by the elevating means 7 and the clamp arm 31 is raised to clamp it on the adjacent bridge girder 1 (indicated by D in the figure). After that, the main clamp means 3 is removed, the moving frame 6 is lowered by the elevating means 7, then the support frame 5 is moved to the adjacent bridge girder 1 side, and then the elevating means 7 is operated to raise the moving frame 6 and the main clamp means. 3 is clamped to the bridge girder 1 (indicated by E in the figure). Here, the device 2 is in a both-supported state by the traverse clamp unit 30 and the main clamp means 3, and at this time, maintenance work between the bridge girders 1 can also be performed. Next, crossing clamp unit 30
Is removed to move the moving frame 6 and then the supporting frame 5
And the relative movement of the moving frame 6 is restricted.

Finally, if the support frame 5 is rotated with respect to the work scaffolding 9, the same turning motion as described above (state III) is achieved, and the moving frame 6 is positioned along the longitudinal direction of the bridge girder 1 and continues. Maintenance work under the adjacent bridge girder 1 can be performed (state V).

Further, as shown in FIG. 3, when the spans S ₁ and S ₂ of the bridge girder 1 are different from each other, if the auxiliary clamp means 8 is fixedly provided at both ends of the moving frame 6, one auxiliary clamp is provided. When the means 8 is tried to be hung on the bridge girder 1, a situation occurs in which the other auxiliary clamp means 8 cannot be hung on the bridge girder 1 (indicated by a chain double-dashed line in the figure). According to the present invention, since the space adjusting means 4 for fine adjustment is provided, the space adjusting means 4 is operated to move the auxiliary clamp means 8 close to or away from each other so that the space between the auxiliary clamp means 8 can be adjusted to the bridge girder 1. The distance between the span bridge girders 1 can be dealt with one by one, so that versatility can be exhibited according to the versatility of the bridge.

In the present invention described above, by repeating the above-mentioned work without affecting traffic on the bridge and without being obstructed by the movement of the lighting posts, etc., the entire lower surface of the bridge can be easily carried out. It can be moved and maintenance work can be performed in a wide range.

In addition, in this embodiment, the truss structure of the moving frame 6 can reduce the weight, and the clamp arm can be achieved.
10. The auxiliary clamp frame 28 is minimized to reduce the outer dimensions of the device 2, that is, the device 2 is downsized.

[Effects of the Invention] In summary, according to the present invention, the following excellent effects are exhibited.

It can be easily moved along the bridge girder to perform efficient maintenance work in a wide range, and it can be safely and reliably driven by stable turning without using crossing rails, etc. You can also move vertically and horizontally.

[Brief description of drawings]

FIG. 1 is a perspective view showing a preferred embodiment of the present invention, FIG. 2 is a plan view showing an operating state, and FIG. 3 is a side view showing the operation of the gap adjusting means. In the figure, 1 is a bridge girder, 3 is a main clamp means, 5 is a support frame, 6 is a moving frame, 7 is a lifting means, 8 is an auxiliary clamp means, and 9 is a work scaffold.

Claims (1)

[Claims] 1. A work scaffold horizontally provided facing the lower surface of the deck between the bridge girders, a main clamp means provided on the work scaffold for detachably clamping the bridge girder, and swingable under the work scaffold. A support frame supported by the support frame, a movable frame having a predetermined length supported by the support frame so as to be able to travel and move, and when traveling straight along the longitudinal direction of the bridge girder provided at both ends of the movable frame. A straight-moving clamp unit that is detachably clamped to the bridge girder, and an auxiliary clamp means having a traverse clamp unit that is detachably clamped to the bridge girder when it changes direction by traversing the support frame and crosses between the bridge girders. An elevating means for elevating and lowering the auxiliary clamp means to elevate and lower the moving frame; and moving the auxiliary clamp means along the moving frame. Allowed by bridges maintenance device being characterized in that a gap adjusting means to correspond to the distance between the bridge girder.