JPS61137903A - 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 in particular, it is mainly used to repair peeling of lIJ paint on steel materials on the lower surface of road bridges or elevated roads, cracks in concrete floor plates, etc. inspection,
This invention relates to a bridge maintenance device that is used for repairs and has excellent mobility.

[Prior Art] Conventionally, the following types of bridge maintenance devices are known as this type of bridge maintenance device.

■ A rail is installed on the underside of a bridge, and an inspection table is moved along the rail to inspect the underside of the bridge.

■ Extend the arm from a work vehicle parked on the road above the bridge to the underside of the bridge, place the work gondola or work scaffold set up on this 7-m, and inspect the underside of the bridge.
Something that was designed to be repaired.

■ Furthermore, a system is being considered in which a base is installed on the bridge railing, an arm is extended from this base to the underside of the bridge, and a workbench installed on this arm is placed facing the underside of the bridge to perform maintenance work. .

[Problem to be solved by the invention 1 However, in the past, there were the following problems.

In case (2), since rails cannot be installed across the piers, the movement range of the inspection table is limited to a narrow range between the piers. Furthermore, since the structure is complex and it is difficult to remove the inspection table from the rails, a set of inspection tables and rails must be installed between each pier, resulting in poor equipment efficiency.

In case of ■, work vehicles are deployed on the road above the bridge, so they can move freely without being obstructed by bridge piers, etc., but it is necessary to control traffic while the vehicles are stopped during work, especially There were many problems when detours could not be taken, such as on expressways.

Regarding ■, the existing bridge railings do not have the strength to support a workbench by attaching the base, so significant reinforcement is required, and lighting posts are also installed. There is a problem that it cannot be deployed in places with soundproof walls, etc.

[Object of the Invention] The present invention was devised in view of the above-mentioned problems, and its purpose is to easily cover a wide area of the lower surface of a bridge while avoiding obstacles such as piers. To provide bridge maintenance equipment that can be moved to.

[Summary of the invention! ! ] The present invention provides a pair of work platforms that are removably supported by a bridge girder, each of which is provided with a rotating body that can be rotated horizontally, and each of these rotating bodies is provided with one end of a parallel link arm that is movable up and down. At the same time, the other ends of these parallel link arms are horizontally rotatably connected to each other by a pivot body, and a lifting drive means for raising and lowering the parallel link arms and a turning mechanism for horizontally rotating the parallel link arms around the pivot body. The bridge is equipped with a drive means to enable the work platform to be moved both vertically and horizontally with respect to the bridge.

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

As shown in FIGS. 1, 3, and 4, girder members 2 are disposed along the longitudinal direction of the lower surface of the bridge 1, and directly connected to the girder members 2 at predetermined intervals. , bridge piers 3 are provided to cross at the corners and support the bridge 1.

A pair of work platforms 5 equipped with clamping means 4 are removably supported on the girder members 2 of the bridge 1 constructed in this manner.

These workbenches 5 are equipped with workers to carry out inspections and repairs, or to carry out unmanned maintenance by mounting an automatic painting machine or the like.

Each of these worktables 5 has a rotary body 7 that can be freely rotated horizontally around a vertical axis by a vertical bin 6 provided at the bottom of the workbench 5.
is provided. A parallel link arm 8 is connected to each of the rotating bodies 7 so as to be movable up and down. This parallel link arm 8 is constituted by a known parallel link mechanism, and one end thereof is rotatably supported by the horizontal pin 9 of the rotating body 7, so that the entire 7-arm 8 can be moved up and down in the vertical direction. There is.

As shown in FIGS. 5 and 6, the other end of the parallel link 7-arm 8 constructed in this manner is provided with a pivot body 1o that connects these arms 8 to each other so as to be rotatable in the horizontal direction. The pivot body 10 includes a support plate 11 that is connected to a pair of arms 8, a pivot pin 12 that connects the support plates 11 so as to be rotatable around a vertical axis, and a support plate 11 and the arm 8.
and a horizontal pin 13 that rotatably connects the two.

On the other hand, as shown in FIGS. 3 and 4, the parallel link arm 8 is provided with a first hydraulic cylinder 14 as an elevating drive means that applies an elevating force to move the parallel link arm 8 up and down. This first hydraulic cylinder 14 is disposed in a "crossing" manner with respect to the parallel link arm 8, expands and contracts to sequentially deform the parallelogram of the arm 8, and raises and lowers it, and also adjusts the desired inclination angle θl, The position is held at θ2.

Further, as shown in FIGS. 5 and 6, the workbench 5 and the pivot body 10 are provided with a turning drive means that applies a turning force to turn the parallel link arm 8 in the horizontal direction. In this embodiment, it is composed of a shaft drive motor 15 provided on the workbench 5 and a second hydraulic cylinder 16 provided on the pivot body 10. The shaft drive motor 15 is connected to the rotary body 7 through a gear, rotates the rotary body 7, rotates the arm 8 with respect to the workbench 5, and rotates the arm 8 at a desired rotation angle θ3. The position is held at θ4.

A pair of second hydraulic cylinders 16 are provided between the pivot bin 12 and both arms 8, and are extended and contracted to rotate the other arm 8 with respect to one arm 8, so that the entire body is bent at a predetermined bending angle. It is designed to be bent at θ5.

Note that 17 is an operation unit.

Also shown in FIG. 7 is the clamping means 4.

The clamping means 4 is provided at the four corners of the workbench 5, and is supported on the workbench 5 by an elevating mechanism 18 such as a hydraulic cylinder so that it can be raised and lowered. It is supported so that it can move freely in the direction. Then, the clamping means 4 tilts the clamp arm 21 using the cylinder 20 to fit the hook 22 into the flange 2a of the beam member 2, and then presses the movable member 23, which is movable in the vertical direction, onto the flange 2a for clamping. ing.

Next, we will discuss the effect.

First, the installation of this device will be explained. As shown in FIG. 3, when this device is placed under the bridge 1, first, one of the first hydraulic cylinders 14 serving as the lifting/lowering driving means is extended. When extended, the parallel link arm 8 moves towards the pivot body 1
Raise the workbench 5 relative to o. Then the other first
When the hydraulic cylinder 14 is contracted, the pivot body 10 is raised relative to the other workbench 5, and as a result, one workbench 5 is raised to a height approximately equivalent to two parallel link arms 8. Ru. Then, the raised workbench 5 is engaged and supported by the girder 2 by the clamp means 4.

Next, the other first hydraulic cylinder 14 is sequentially extended. Due to this extension, the other workbench 5 passes below and above the pivot body 10 and faces the lower surface of the bridge 1. This completes the installation work.

Next, maintenance work will be described.

When inspecting or repairing the lower surface of the bridge 1, as shown in FIG. By horizontally pivoting the parallel link arm 8 using the second hydraulic cylinder 16, maintenance work can be carried out over a considerable range.

After that, when the maintenance work is completed within the movable range of one workbench 5, the moved workbench 5
After engaging the girder 2 with the clamping means 4 to make it a fixed side,
Clamping means 4 for the other workbench 5 that has been fixed until now
is removed and the other workbench 5 is made movable to carry out maintenance work on the lower surface of the bridge 1.

Thereafter, one workbench 5 is fixed to the girder 2 in turn, and the other workbench 5 is moved by the swing drive means to proceed with maintenance work along the longitudinal direction of the bridge 1. Become.

By the way, when moving forward in this way, the pier 3 etc. may obstruct the movement. Here, the present device can take two methods to overcome such obstacles.

The first method is to bridge 1I13 as shown in Figures 2 and 6.
If there is enough room for the arm 8 to project from the workbench 5 fixed to the girder 2 with respect to the horizontal projecting portion 3a of the horizontal projecting portion 3a, as shown in FIG.
The workbench 5 is once extended outward in the width direction of the bridge @1, and then the arm 8 is moved around the horizontal extension 3a.
The work platform 5 may be moved under the bridge 1 by straddling the pier 3 from the side.

This method is particularly effective when there is no space under the pier 3.

The second method is as shown in FIGS. 1 and 4, when there is a space under the pier 3, and the horizontal overhang 3a of the bridge 113 is fixed to the girder 2 for a very long time. This is effective when it is not possible to horizontally bypass the pier 3 by extending the arm 8 from the workbench 5. In this case, as shown in FIG. 3, the movable work platform 5 is lowered into the space under the pier 3 with respect to the fixed work platform 5 by the first hydraulic cylinder 14 serving as a lifting drive means, and the arm 8 The work platform 5 can be entered under the bridge 1 by straddling the pier 3 from below.

By such an operation, maintenance can be performed on the lower surface area by moving the bridge 1 forward along the longitudinal direction while passing over the project area such as the pier 3.

Furthermore, since no work vehicles or the like are parked on the road above the bridge 1, it does not obstruct traffic.

Furthermore, it can be configured with a simple lifting mechanism and a turning mechanism, which reduces the cost of the device, and also allows maintenance work to be carried out over the entire bridge 1 continuously by attaching it to the girder 2 once. can be applied, significantly improving work efficiency.

Incidentally, when the present device is removed and transported, the installation work can be performed in the opposite direction, and the device can be mounted on a transport vehicle 24 and transported as shown in FIG. In this case, by providing the rotating body 7 on the end side of the workbench 5, the workbench 5 is stored on the 7-m8 side using the shaft drive motor 15 as shown in FIG. 9 and factor 10. This allows the overall length when stored to be approximately the length of the arm, making it compact.

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

(1) By configuring the pair of work platforms so that they can be rotated and raised and lowered alternately, it is possible to perform installation and removal work on bridge girders, maintenance work to a considerable extent, and advance work, especially for bridge piers. It is possible to overcome obstacles according to the situation and perform continuous maintenance work on the entire bridge.

■ Therefore, maintenance work can be carried out efficiently without interfering with surrounding traffic, and there is no need to reinforce existing bridge sections.

(3+ The elevating mechanism and the turning mechanism have a simple structure, and the device can be manufactured at a much lower cost than the conventional installation of rails, etc.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a state in which the bridge maintenance device according to the present invention straddles a bridge pier from below, Fig. 2 is a perspective view showing a state in which it straddles the pier so as to circumvent the pier from the side, and Fig. 3 4 is a side view of FIG. 1, FIG. 5 is a plan view of the rotating state, FIG. 6 is a plan view of FIG. 2, and FIG. 7 is a schematic side view of the clamping means. 8 is a side view showing the state of being mounted on a transport vehicle, FIG. 9 is a side view showing the stored state, and FIG. 10 is a front view thereof. In the figure, 1 is a bridge, 2 is a girder, 5 is a workbench, 7 is a rotating body, 8 is a parallel link arm, 10 is a pivot body, 14 is a first hydraulic cylinder illustrated as an elevating drive means, 16 is a A shaft drive motor and a second hydraulic cylinder are illustrated as the swing drive means. Patent Applicant Ishikawajima-Harima Heavy Industries Co., Ltd. Representative Patent Attorney Nobuo Kinuya Σ Figure 8 1 Figure 9 Figure 10

Claims (1)

[Claims] A pair of work platforms removably supported by girder members of a bridge, a rotating body provided on each of these work platforms so as to be freely rotatable in a horizontal direction, and a parallel link arm that is connected at one end to the rotating body and can move up and down. , a pivot body that connects the other ends of the parallel link arms to each other so as to be rotatable in the horizontal direction, a lifting drive means that applies a lifting force to each of the parallel link arms, and a pivot for horizontally turning the parallel link arms. A bridge maintenance device characterized by comprising a swing drive means for applying force.