JP7440189B2 - Slide movement method for mobile scaffolding equipment for elevated bridges - Google Patents

Description

The present invention relates to a sliding construction method for a mobile scaffolding device for elevated bridges used for repair work on elevated bridges such as railways.

BACKGROUND ART Mobile scaffolding devices that can slide along the viaduct in the axial direction of the bridge have been used for repair work on the walls of elevated bridges such as railways.

To briefly explain this mobile scaffolding device, there is a slide rail installed on the viaduct, a rail moving device that slides along the slide rail, and a rail moving device that is suspended from the rail moving device and moved below the viaduct. The system is equipped with a work scaffold that is moved in the axial direction of the viaduct using a rail moving device to carry out repair work on the lower wall of the viaduct. Repair work can be performed on the lower wall surface of the viaduct while moving the scaffolding device in the axial direction of the viaduct (see, for example, Patent Document 1).

Japanese Patent Application Publication No. 2012-102468

This type of mobile scaffolding equipment is difficult to install when there are power supply boxes, electric poles, etc. protruding from the lower wall of the bottom wall of the viaduct or the outer wall of the outside wall, and these become obstacles and prevent the scaffold from moving. The device cannot be moved.

For this reason, with conventional mobile scaffolding equipment, once the scaffolding reaches the vicinity of an obstacle, the repair work is stopped, the scaffolding equipment is removed, and the mobile scaffolding is reinstalled at a position beyond the obstacle to begin the repair work. The work had to be restarted, and the work efficiency was extremely poor.

The present invention focuses on and attempts to solve these problems, and even if there are obstructive protrusions such as power supply boxes or utility poles on the bottom wall or outer wall of the viaduct, these obstacles will be avoided. To provide a sliding construction method for a mobile scaffolding device for a viaduct, which can continuously perform repair work on the bottom wall or outer wall of a viaduct by sliding over a protrusion.

The gist of the present invention will be explained with reference to the accompanying drawings.

A mobile scaffolding device S for a viaduct is installed on a viaduct 1 that has an obstructing protrusion 20 on the bottom wall 2 or outer wall 4, and the mobile scaffolding device S for viaduct is slid in the axial direction of the viaduct 1 to complete the viaduct. A slide movement construction method of a mobile scaffolding device for a viaduct used to sequentially repair the bottom wall part 2 or the outer wall part 4 of 1,
A slide rail 6 installed on the bottom wall 2 or outer wall 4 of the viaduct 1, a rail moving device 7 attached to the slide rail 6 and slid along the slide rail 6, and a rail moving device 7 that is attached to the slide rail 6 and slides along the slide rail 6. Using the mobile scaffolding device S for an elevated bridge, which comprises a working scaffolding 8 that is suspended from the device 7 and slides along the slide rail 6 together with the rail moving device 7,
An extension rail 6A is provided on the bottom wall 2 or the outer wall 4 on the front side of the slide beyond the obstacle protrusion 20 on the extension scaffold 19 provided at the front end of the work scaffold 8 in the sliding direction. The first step of installing
The rail moving device 7 removed from the slide rail 6 is attached to the extension rail 6A, and the rail moving device 7 attached to the extension rail 6A also moves to the rear side of the extension scaffold 19 in the slide movement direction. a second step of suspending the work scaffold 8;
a third step of sliding the working scaffold 8 together with the rail moving device 7 along the extension rail 6A to the front side in the bridge axis direction beyond the obstacle protrusion 20;
The first step, the second step, and the third step are sequentially repeated until the rear end of the working scaffold 8 in the sliding direction reaches beyond the obstacle protrusion 20 and reaches the front side in the bridge axis direction. The present invention relates to a sliding construction method of a mobile scaffolding device for elevated bridges.

Further, a plurality of the rail moving devices 7 are attached to the slide rail 6, and the working scaffold 8 is suspended from the plurality of rail moving devices 7,
In the second step, the rail moving device 7 closest to the obstacle protrusion 20 is removed from the slide rail 6, and the removed rail moving device 7 is moved onto the extension scaffold 19 or the working scaffold 8. The work scaffolding 8 is attached to the extension rail 6A above, and the working scaffold 8 is also suspended from the rail moving device 7 attached to the extension rail 6A.
Of the rail moving devices 7 remaining on the slide rail 6, the one closest to the obstacle protrusion 20 after the third step is sequentially removed from the slide rail 6 and attached to the extension rail 6A,
The first step and the second step are performed until the rail moving device 7, which was farthest from the obstructive protrusion 20 before the start of sliding movement, is removed from the slide rail 6 and attached to the extension rail 6A. 2. The slide movement construction method for a mobile scaffolding device for a viaduct according to claim 1, wherein the third step is repeated.

Further, the slide rail 6 is formed into a long rail by joining a plurality of slide rails of a predetermined length,
removing the slide rail 6, which the rail moving device 7 has passed by due to the sliding movement of the working scaffold 8 in the axial direction of the viaduct 1, from the bottom wall portion 2 or the outer wall portion 4;
The removed slide rail 6 is installed as the extension rail 6A on the bottom wall 2 or the outer wall 4 on the front side of the slide beyond the obstacle protrusion 20 on the extension scaffold 19. The present invention relates to a slide movement construction method of a mobile scaffolding device for a viaduct according to any one of claims 1 and 2.

Further, in the first step, after suspending the front side of the work scaffold 8 in the sliding direction or the extension scaffold 19 from the bottom wall portion 2 or the outer wall portion 4 using the temporary suspension device 21, An extension rail 6A is installed on the bottom wall 2 or the outer wall 4 on the front side of the slide beyond the obstacle protrusion 20,
In the second step, the rail removed from the slide rail 6 is moved to the extension rail 6A on the front side in the slide movement direction of the work scaffold 8 or with the extension scaffold 19 suspended by the temporary suspension device 21. According to any one of claims 1 to 3, the working scaffold 8 is suspended from the rail moving device 7 attached to the extension rail 6A by attaching a device 7 thereto. This relates to a sliding construction method for mobile scaffolding equipment for elevated bridges.

Since the present invention is configured as described above, the mobile scaffolding device for elevated bridges can slide to overcome an obstacle protrusion without the troublesome work of removing and reinstalling each time it reaches an obstacle protrusion. This is an extremely practical sliding construction method for mobile scaffolding equipment for elevated bridges that can continuously carry out repair work on the bottom wall and outer wall of the elevated bridge.

Moreover, in the invention as set forth in claim 2, it becomes a slide movement construction method of a mobile scaffolding device for a viaduct which is more practical and which reliably exhibits the above-mentioned effects.

Furthermore, in the invention as claimed in claim 3, the slide rail that is no longer needed after the work scaffold (rail moving device) has passed is removed and reused as an extension rail, so that it functions as a slide rail and an extension rail. This is a highly practical sliding construction method for mobile scaffolding equipment for elevated bridges, which reduces the amount of rail material brought to the site and reduces work costs accordingly.

In addition, in the invention set forth in claim 4, the work of installing the extension rail on the extension scaffold by suspending it with a temporary suspension device is also performed by attaching the rail moving device removed from the slide rail to the extension rail. This is a slide movement construction method for a mobile scaffolding device for elevated bridges that is even more practical and can safely suspend work scaffolding using the rail moving device attached to the extension rail.

It is an explanatory side view showing the state where the mobile scaffolding for elevated bridges of a present example was installed in a viaduct. FIG. 2 is an explanatory view of FIG. 1 viewed from the rear side in the sliding direction of the movable scaffold for elevated bridges. Continuing from Figure 1, the bottom wall work scaffold is slid in the direction of the bridge axis while sequentially removing the slide rails that the lifting device has passed, and an extension scaffold is placed on the bottom wall on the front side of the slide beyond the obstacle protrusion. It is an explanatory side view showing a state suspended by a temporary suspension device. FIG. 4 is an explanatory side view following FIG. 3, showing a state in which the removed slide rail is installed as an extension rail on the bottom wall portion on the front side of the slide beyond the obstructive protrusion. Continuing from Figure 4, attach the suspension device removed from the slide rail to the extension rail, and use the suspension device attached to the extension rail to suspend the work scaffold on the rear side of the extension scaffold in the slide movement direction. FIG. 3 is an explanatory side view showing a state where Continuing from Figure 5, the bottom wall work scaffold is slid, an extension rail is added and installed, and the work scaffold on the rear side of the extension scaffold in the sliding direction is suspended using a temporary suspension device. It is an explanatory side view. Continuing from Figure 6, attach the suspension device removed from the slide rail to the extension rail, and use the suspension device attached to this extension rail to suspend the work scaffold on the rear side of the extension scaffold in the slide movement direction. FIG. 3 is an explanatory side view showing a state where FIG. 3 is an explanatory side view showing how the scaffold posture maintaining guide moves while avoiding an obstructive protrusion. FIG. 8 is an explanatory side view following FIG. 7 showing how the scaffolding for working on the outer wall slides while avoiding an obstructive protrusion. FIG. 9 is an explanatory view of FIG. 9 viewed from the rear side in the sliding direction of the movable scaffold for elevated bridges. FIG. 9 is an explanatory perspective view of FIG. 9; FIG. 10 is an explanatory side view following FIG. 9, showing a state in which the scaffold for working on an outer wall has reached a position beyond an obstacle protrusion. FIG. 12 is an explanatory view of the movable scaffold for elevated bridges seen from the rear side in the sliding direction. FIG. 2 is an explanatory perspective view showing the relationship between the slide rail and the rail moving device of the movable scaffold for elevated bridges, the guide for maintaining the scaffold posture, and the scaffold slide stop means of the present embodiment. FIG. 2 is an explanatory perspective view showing the approach/separate slide mechanism of the movable scaffold for elevated bridges and the outer wall scaffold positioning means of the present embodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be briefly described based on the drawings, showing the effects of the present invention.

The present invention includes a slide rail 6 installed on the bottom wall 2 or outer wall 4 of the viaduct 1, a rail moving device 7 that is attached to the slide rail 6 and slides along the slide rail 6, The above-mentioned mobile scaffolding device S for elevated bridges, which is composed of a working scaffold 8 that is suspended from this rail moving device 7 and slides along the slide rail 6 together with the rail moving device 7, is used. The scaffolding device S is slid along the slide rail 6 in the bridge axis direction of the viaduct 1 to sequentially repair the bottom wall 2 or the outer wall 4 of the viaduct 1.

In addition, where there is an obstructive protrusion 20 on the bottom wall 2 or outer wall 4 of the viaduct 1, the following first step, second step, and third step are performed in sequence.

Specifically, as the first step, the bottom wall portion 2 on the front side of the slide beyond the obstacle protrusion 20 on the extension scaffold 19 provided at the front end of the work scaffold 8 in the sliding direction. Alternatively, an extension rail 6A may be installed on the outer wall portion 4.

Next, as the second step, the rail moving device 7 removed from the slide rail 6 is attached to the extension rail 6A, and the rail moving device 7 attached to the extension rail 6A also moves to the extension scaffold 19. The working scaffold 8 on the rear side in the slide movement direction is suspended.

Next, as the third step, the working scaffold 8 is slid along the extension rail 6A together with the rail moving device 7 to the front side in the bridge axis direction beyond the obstacle protrusion 20.

Next, the first, second, and third steps are repeated in sequence until the rear end of the working scaffold 8 in the sliding direction reaches beyond the obstructive protrusion 20 and reaches the front side in the bridge axis direction.

In this way, the mobile scaffolding S for the viaduct can be moved to overcome the obstacle protrusion 20, and the repair work can be carried out continuously on the bottom wall 2 and outer wall 4 of the viaduct 1, including the obstacle protrusion 20. It can be carried out.

Specific embodiments of the present invention will be described based on the drawings.

In this embodiment, a mobile scaffolding device S for a viaduct is installed on a viaduct 1 having an obstacle protrusion 20 on the bottom wall 2 or an outer wall 4, and the mobile scaffolding device S for a viaduct is installed in the axial direction of the viaduct 1. The present invention relates to a sliding construction method for a mobile scaffolding device for a viaduct, which is used to repair the bottom wall 2 or outer wall 4 of a viaduct 1 in sequence by sliding the device.

First, to explain the mobile scaffolding device S for a viaduct used in this embodiment, it is installed on the bottom wall 2 of the viaduct 1 (although not shown, a configuration is adopted in which it is installed on the outer wall 4). ) A slide rail 6, a rail moving device 7 that is attached to the slide rail 6 and slides along the slide rail 6, and a rail moving device 7 that is suspended from the rail moving device 7 and that is attached to the slide rail 6 and slides along the slide rail 6. It is comprised of a working scaffold 8 that slides along the slide rail 6.

The slide rail 6 is made of H-shaped steel 6 as shown in FIGS. 11 and 14.

The rail moving device 7 employs a hanging device 7, and the work scaffold 8 is suspended from the hanging device 7. The traveling movement of the hanging device 7 along the slide rail 6 allows the work to be carried out. The scaffolding 8 is configured to be able to slide in the axial direction of the viaduct 1 together with a scaffolding 9 for working on external walls, which will be described later.

In addition, to further explain this hanging device 7, as shown in FIGS. 11 and 14, an existing geared trolley 7A and plain trolley 7B that can slide and move along the H-shaped steel 6 are adopted, and this trolley 7 is equipped with A work scaffold 8 is suspended from a hanging chain 31, and when a worker on the work scaffold 8 manually operates the drive chain 32 of the geared trolley 7A, the work scaffold 8 is suspended. A scaffold 9 for outer wall work, which will be described later, is configured to slide in the axial direction of the viaduct 1.

The work scaffold 8 is an existing suspended scaffold called QuikDeck (registered trademark), and has a rectangular work floor 22 in a plan view having a length in the front-rear direction along the bridge axis direction of the viaduct 1. (Hereinafter, in this embodiment, the direction parallel to the bridge axis direction will be referred to as the front-back direction of the work scaffold 8, and the direction orthogonal to the bridge axis direction will be referred to as the front-back direction of the work scaffold 8. ) is connected to the suspension chains 31 of the plurality of suspension devices 7 and is disposed in a suspended state below the bottom wall portion 2 of the viaduct 1, and the suspension device 7 in the bridge axis direction of the viaduct 1 to perform repair work on the lower wall surface 3 of the bottom wall portion 2, that is, it is configured to function as a scaffold 8 for bottom wall work.

In addition, this bottom wall work scaffold 8 is located on the outer wall 4 side of the piers 11 of the viaduct 1 and is disposed below the bottom wall 2. ), and is configured such that the bottom wall work scaffold 8 can slide in the axial direction of the viaduct 1 along the slide rail 6 without contacting the piers 11. .

The bottom wall work scaffold 8 is disposed outside the outer wall 4 of the viaduct 1, and is moved together with the bottom wall work scaffold 8 in the bridge axis direction of the viaduct 1 by the hanging device 7. An outer wall work scaffold 9 for repairing the outer wall surface 5 of the outer wall portion 4 is provided in an upright state.

More specifically, the bottom wall work scaffold 8 is an end disposed on the outer wall 4 side of the viaduct 1, with the rear side extending outward from the outer wall 4 from the middle in the front-rear direction. This extended scaffold part is configured as a communication scaffold 12, and the external wall work scaffold 9 is provided on the communication scaffold 12, and the external wall work scaffold 9 is connected to the external wall part. The connecting scaffold 12 is arranged so as to protrude outward from the scaffold 4, and is configured so that a worker can come and go between the scaffold 8 for working on the bottom wall and the scaffold 9 for working on the outer wall via this communication scaffold 12. In addition, according to this embodiment in which QuikDeck (registered trademark) is employed as the bottom wall work scaffold 8, the construction of this communication scaffold 12 is also easily performed.

In addition, the scaffolding 9 for working on the external wall of this embodiment is configured as a vertically long frame-shaped scaffold body in which scaffold boards 24 are arranged in two upper and lower stages, and when installed on the viaduct 1, the external wall work It is formed in a shape having a height dimension equivalent to the height of No. 4.

Reference numeral 27 in the figure is installed between the front and back two locations below the middle of the scaffolding 9 for working on the outer wall and the inside position of the front and rear traveling rails 13 (the side closer to the piers 11 of the viaduct 1). A support bar 28 that reinforces and supports the standing state of the scaffold 9 for exterior wall work is a connecting tool (flexible clamp) for connecting both ends of the support bar 27 to the scaffold 9 for exterior wall work and the running rail 13. ).

Since the scaffold 9 for working on the outer wall, which is disposed outward from the outer wall 4, is on the scaffold 8 for working on the bottom wall (the communication scaffold 12 connected thereto), the scaffold 8 for working on the bottom wall has the following features: The side disposed on the outer wall 4 side is heavier, and therefore a load is applied to the bottom wall work scaffold 8 that causes the outer wall 4 side of the work floor 22 to fall downward. , a rod-shaped scaffold posture maintaining guide 17 that abuts from below a position near the pier 11 of the lower wall surface 3 of the bottom wall portion 2 and can run along the lower wall surface 3 is attached to the pier of the bottom wall work scaffold 8. 11 (see FIGS. 2, 10, 13, and 14).

Further, to explain in more detail about this scaffold posture maintenance guide 17, as shown in FIGS. The scaffold holding guides 17 are provided upright at several locations spaced apart in the longitudinal direction of the scaffolding 8, and at the upper end of each of the scaffold holding guides 17, there is a position near the pier 11 on the lower wall surface 3 of the bottom wall portion 2. An abutting roller 25 is provided which abuts from below and can run along the lower wall surface 3. Reference numeral 36 in the figure is an intervening crosspiece that is detachably interposed between adjacent scaffolding posture maintaining guides 17 to maintain an appropriate distance between adjacent scaffolding posture maintaining guides 17.

In addition, this scaffolding posture maintaining guide 17 is configured to be expandable and contractible by rotating the operating handle 26 in the forward and backward directions, and is configured to be able to expand and contract at locations where the obstructive protrusion 20 is present on the lower wall surface 3 of the bottom wall portion 2. In this case, by removing the intervening beam 36 and shortening the scaffold posture maintaining guide 17, the scaffolding is configured to be able to move while avoiding the obstructive protrusion 20 (see FIG. 8).

The reference numeral 33 in the figure is a reinforcing crosspiece of the scaffold posture maintaining guide 17.

Further, the outer wall work scaffold 9 is provided with an outer wall scaffold guide 16 on its upper part that is slidable along the outer wall portion 4 of the viaduct 1 (see FIGS. 2, 10, and 13).

Although not shown in detail, this outer wall scaffolding guide 16 is configured to be fitted onto the upper end of the outer wall portion 4 so as to be able to run, and also has a sliding mechanism 10 which will be described later. A structure is adopted that allows expansion and contraction adjustment in response to the sliding movement of the scaffold 9 for working on the outer wall through the scaffold.

Furthermore, the scaffold 9 for working on the outer wall of the present embodiment is connected to the scaffold for working on the bottom wall via an approach/separate slide mechanism 10 that is capable of sliding toward and away from the outer wall surface 5 of the outer wall portion 4 of the viaduct 1. It is set at 8.

Specifically, in the approach/separation slide mechanism 10, two running rails 13 having a rail length in the left and right direction of the bottom wall work scaffold 8 perpendicular to the bridge axis direction of the viaduct 1 are connected to the communication scaffold 12. Wheels 14, which are installed parallel to each other in the front and rear of the top and can run along these two running rails 13, are provided at four locations in the front, back, left and right of the lower part of the scaffold 9 for working on external walls. The scaffold 9 for working on the outer wall is configured to stably slide toward and away from the outer wall surface 5 of the outer wall portion 4 of the viaduct 1 (see FIG. 15).

Further, an outer wall scaffold positioning means 15 is provided for positioning and holding the scaffold 9 for outer wall work by preventing it from sliding toward and away from the outer wall portion 4.

To explain this outer wall scaffolding positioning means 15 in detail, it is arranged at four locations on the front, rear, right and left sides corresponding to the four wheels 14 at the bottom of the outer wall work scaffold 9 so as to straddle the traveling rail 13. A substantially U-shaped leg frame 34 is installed vertically, and a tightening bolt 35 is screwed into this leg frame 34, and the tightening bolt 35 screws into and out of the traveling rail 13 by tightening and loosening operations. 35 is brought into pressure contact with the traveling rail 13 by a tightening operation, the sliding movement of the outer wall work scaffold 9 toward and away from the outer wall portion 4 is prevented, and the outer wall work scaffold 9 is placed in the positioning state, and the tightening bolt 35 is loosened. When the platform 9 is moved away from the traveling rail 13, the scaffold 9 for working on the outer wall can be slid toward and away from the outer wall portion 4 via the slide mechanism 10.

The mobile scaffolding device S for elevated bridges of this embodiment includes a scaffold slide stop means 18 that prevents the bottom wall work scaffold 8 from sliding relative to the slide rail 6 and holds it in position.

Specifically, in this embodiment, a plurality of the hanging devices 7 are attached to the slide rail 6 (in the drawing, five pieces each are attached to the left and right slide rails 6), but there is no space between adjacent hanging devices 7. , a spacing maintaining bar 29 is removably installed, and is configured so that the distance between adjacent hanging devices 7 is maintained at an appropriate interval by this spacing maintaining bar 29. Slide means 18 are provided.

This scaffold slide stop means 18 has a press-contact part 18 protruding from the upper part of the spacing support bar 29, and this press-contact part 18 is configured to be able to be controlled to protrude and retract by rotating the rotary handle 30 in the forward and reverse directions. By pressing this pressure contact portion 18 against the slide rail 6, the bottom wall work scaffold 8 is prevented from sliding with respect to the slide rail 6, and is held in position, and the pressure contact portion 18 is moved toward the slide rail 6. By releasing the press-contact state, the bottom wall work scaffold 8 is configured to be able to slide relative to the slide rail 6.

Further, the bottom wall work scaffold 8 of the present embodiment has a front end portion of the bottom wall beyond the obstacle 20 on the front side in the slide movement direction along the slide rail 6. 2 or the work of installing the extension rail 6A on the outer wall 4, the work of replacing the hanging device 7 on the installed extension rail 6A, or the work on the bottom wall while replacing the hanging device 7 on the installed extension rail 6. An extension scaffold 19 is provided to install a temporary suspension device 21 on the bottom wall 2 for temporarily suspending the scaffold 8.

This extension scaffold 19 may be provided in advance on the bottom wall work scaffold 8, or when the front side of the bottom wall work scaffold 8 reaches the vicinity of the obstacle protrusion 20, the bottom wall work scaffold 8 can be slid. The extension scaffold 19 may be constructed on the front side in the direction, and this work of constructing the extension scaffold 19 is easily performed according to this embodiment in which QuikDeck (registered trademark) is employed as the scaffold 8 for bottom wall work.

In addition, as shown in FIG. 3, in this extension scaffold 19, the suspension device 7 that suspends the most front side of the bottom wall work scaffold 8 in the slide movement direction is located at the end of the slide rail 6 that is close to the obstacle protrusion 20. When reaching the front side of the slide beyond the obstacle protrusion 20, the extension rail 6A is installed on this extension scaffold 19 on the bottom wall 2 on the front side of the slide beyond the obstacle protrusion 20. It is configured to have an extended length that can be used.

Next, a method of sliding the mobile scaffolding S for elevated bridges of this embodiment configured as described above will be explained. The drawing shows a Shinkansen viaduct 1, and the viaduct 1 is provided with electric poles at intervals in the bridge axis direction. Further, this electric pole is provided in a state of protruding outward from the lower wall surface 3 of the bottom wall portion 2 to the outer wall surface 5 of the outer wall portion 4, and in this embodiment, this electric pole is used as an obstructive protrusion 20. explain.

First, the slide rails 6 are installed in a parallel relation to each other by using anchors, for example, at two locations on the bottom wall portion 2 of the viaduct 1, on the side of the outer wall portion 4 from the piers 11, at two spaces apart, inside and outside (left and right). (See Figure 2).

Further, the slide rail 6 is formed by joining a plurality of slide rails of a predetermined length to form a long rail.

Next, five trolleys 7 as the hanging device 7 are attached to the left and right slide rails 6, and the bottom wall work scaffold 8 is stably suspended by a total of ten trolleys 7. A scaffold 8 for bottom wall work is installed so as to be slidable along the slide rail 6 together with the trolley 7 (see FIG. 1).

In addition, some of the ten trolleys 7 in total are geared trolleys 7A, and the rest are plain trolleys 7B, and the driving chain 32 of the geared trolleys 7A is manually operated by the worker on the scaffold 8 for bottom wall work. This makes it possible to slide an external wall work scaffold 9, which will be described later, along with this work scaffold 8 in the bridge axis direction of the viaduct 1, and to slide the viaduct mobile scaffolding device S in the bridge axis direction of the viaduct 1. The bottom wall 2 and outer wall 4 of the viaduct 1 will be repaired in sequence.

The suspension device 7 that suspends the farthest sliding movement front side of the bottom wall work scaffold 8 has reached the end of the slide rail 6 that is close to the obstructive protrusion 20 (electrification pole), and the situation is such that it cannot slide any further. Once this is done, repeat the following first step, second step, and third step in order.

To explain the first step, on the extension scaffold 19 provided at the front end of the bottom wall working scaffold 8 in the sliding direction, extend it to the bottom wall portion 2 on the front side of the slide beyond the obstacle protrusion 20. Install rail 6A.

Specifically, when the suspension device 7 that suspends the frontmost slide movement side of the bottom wall work scaffold 8 reaches the end of the slide rail 6 where it cannot slide, the front side of the slide beyond the obstacle protrusion 20 is suspended. The part of the extension scaffold 19 extending to the side is suspended by a temporary suspension device 21 that employs a lever block (registered trademark) 21 to stabilize the extension scaffold 19. An extension rail 6A is installed on the bottom wall portion 2 on the front side of the slide beyond 20 mm.

In addition, this extension rail 6A removes the slide rail 6, which the suspension device 7 has passed, from the bottom wall portion 2 by sliding the bottom wall work scaffold 8 in the axial direction of the viaduct 1 (see FIG. 3). The removed slide rail 6 is reused as an extension rail 6A (see FIG. 4). In addition, instead of reusing the slide rail 6, a new rail material may be installed as the extension rail 6A. Furthermore, this embodiment shows a construction method in which the lifting device 7 collects the sliding rail 6 that has passed at the same time as the bottom wall work scaffold 8 (and the outer wall work scaffold 9) slides. The extension rail 6A (slide rail 6) may be collected when the bottom wall work scaffold 8 is moved back to the work start position after the work is completed, instead of being collected during the movement.

To explain the second step, the hanging device 7 that is closest to the obstacle protrusion 20 is removed from the slide rail 6 (at this time, the spacing maintaining bar 29 is also removed), and the removed hanging device 7 is removed from the slide rail 6. The suspension device 7 attached to the extension rail 6A also suspends the working scaffold 8 on the rear side of the extension scaffold 19 in the slide movement direction (see FIG. 5).

To explain the third step, the suspension device 7 that was first removed from the slide rail 6 and then the suspension device 7 that was close to the obstacle projection 20 is now removed from the slide rail that is close to the obstacle projection 20 (electrification pole). 6, the working scaffold 8 is slid along the extension rail 6A and the slide rail 6 together with the lifting device 7 to the front side in the bridge axis direction beyond the obstacle protrusion 20. .

After this third step is completed, the first step is then performed, and when the first step is completed, for example, the part of the bottom wall work scaffold 8 that extends beyond the obstacle protrusion 20 to the front side of the slide is moved to the lever block ( The scaffold 8 for bottom wall work is stabilized by suspending it with a temporary suspension device 21 employing a registered trademark (registered trademark) 21, and then the second step, that is, the suspension device 7 closest to the obstacle protrusion 20 is carried out. It is removed from the slide rail 6 and the removed hanging device 7 is attached to the extension rail 6A, so that even the hanging device 7 attached to the extension rail 6A is located on the rear side of the extension scaffold 19 in the slide movement direction. The working scaffold 8 is hung (see FIG. 7), and then the third step is performed.

Next, the first step, second step, and third step are rephrased until the rear end of the working scaffold 8 in the sliding direction reaches the front side in the bridge axis direction beyond the obstacle protrusion 20. This is repeated in sequence until the hanging device 7, which was the most distant from the obstructive protrusion 20 before the start of sliding movement, is removed from the slide rail 6 and attached to the extension rail 6A.

In addition, if the scaffold 9 for working on the exterior wall comes into contact with an obstructive protrusion 20 (electrical pole) on the way, the exterior wall scaffold positioning means 15 (tightening and fixing of the support bar 27 of the connector 28) is released, and the The scaffold 9 for working on the outer wall is slid in a direction away from the outer wall surface 5 of the outer wall portion 4 via the approach/separation slide mechanism 10, and is slid in the direction of the bridge axis while avoiding the obstructive protrusion 20 (Figs. 9 to 9). (See Figure 11).

At this time, by positioning the scaffold 9 for outer wall work using the outer wall scaffold positioning means 15, the obstacle protrusion 20 can be repaired using the scaffold 9 for outer wall work.

When the scaffold 9 for working on the outside wall passes over the obstacle protrusion 20, the scaffold 9 for working on the outside wall is slid in the direction approaching the outside wall surface 5 of the outside wall section 4 via the approach/separation slide mechanism 10 (FIG. 11, (see 12).

Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

1 Viaduct 2 Bottom wall 4 Outer wall 6 Slide rail 6A Extension rail 7 Rail moving device 8 Work scaffolding
19 Extension scaffolding
20 Obstacle protrusion
21 Temporary suspension device S Mobile scaffolding device for elevated bridges

Claims (4)

A mobile scaffolding device for elevated bridges is installed on a viaduct that has an obstructive protrusion on the bottom wall or outer wall, and the mobile scaffolding device for elevated bridge is slid in the axial direction of the viaduct to remove the obstruction from the bottom wall or outer wall of the viaduct. A slide movement method of a mobile scaffolding device for elevated bridges used for sequential repair of
A slide rail installed on the bottom wall or outer wall of the viaduct, a rail moving device that is attached to the slide rail and slides along the slide rail, and a rail that is suspended from the rail moving device. Using the mobile scaffolding device for elevated bridges, which comprises a moving device and a working scaffold that slides along the slide rail,
a first step of installing an extension rail on the bottom wall or the outer wall on the front side of the slide beyond the obstacle protrusion on the extension scaffold provided at the front end in the sliding direction of the work scaffold; ,
A rail moving device that has been removed from the slide rail is attached to the extension rail, and the rail moving device attached to the extension rail also suspends the work scaffold on the rear side of the extension scaffold in the slide movement direction. a second step of setting;
a third step of sliding the working scaffold together with the rail moving device along the extension rail to the front side in the bridge axis direction beyond the obstacle protrusion,
The first step, the second step, and the third step are sequentially repeated until the rear end of the working scaffold in the sliding direction reaches the front side in the bridge axis direction beyond the obstacle protrusion. A sliding construction method for mobile scaffolding equipment for elevated bridges. A plurality of the rail moving devices are attached to the slide rail, and the work scaffold is suspended from the plurality of rail moving devices,
In the second step, the rail moving device that is closest to the obstacle protrusion is removed from the slide rail, and the removed rail moving device is moved onto the extension rail on the extension scaffold or the work scaffold. and the rail moving device attached to this extension rail also suspends the working scaffold,
Of the rail moving devices remaining on the slide rail, the one closest to the obstructive protrusion after the third step is sequentially removed from the slide rail and attached to the extension rail,
The first step, the second step, and the third step until the rail moving device that was farthest from the obstructive protrusion before the start of sliding movement is removed from the slide rail and attached to the extension rail. 2. The slide movement construction method for a mobile scaffolding device for elevated bridges according to claim 1, wherein the above steps are repeated. The slide rail is formed into a long rail by joining a plurality of slide rails of a predetermined length,
removing the slide rail that the rail moving device has passed by due to the sliding movement of the working scaffold in the axial direction of the viaduct from the bottom wall portion or the outer wall portion;
Claims 1 and 2 characterized in that the removed slide rail is installed as the extension rail on the bottom wall or the outer wall on the front side of the slide beyond the obstacle protrusion on the extension scaffold. A sliding construction method for a mobile scaffolding device for a viaduct according to any one of the above. The first step is to suspend the front side of the working scaffold in the sliding direction or the extended scaffold from the bottom wall or the outer wall using a temporary suspension device, and then cross the obstacle protrusion on the extended scaffold. An extension rail is installed on the bottom wall or the outer wall on the front side of the slide,
In the second step, the rail moving device removed from the slide rail is attached to the extension rail on the front side in the slide movement direction of the work scaffold or with the extension scaffold suspended by the temporary suspension device. 4. A slide of a mobile scaffolding device for an elevated bridge according to any one of claims 1 to 3, wherein the working scaffold is also suspended by a rail moving device attached to the extension rail. Mobile construction method.

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