Mobile lifting scaffolding

Abstract

To provide a mobile and elevating scaffold that can realize efficient operation on a high structure that is long extended in the lateral direction.SOLUTION: A mobile and elevating scaffold 1 for allowing a worker to work on a high structure 5 includes a pair of right and left rails 11 installed in an extension direction A of the high structure 5, a mobile carriage 12 that runs autonomously on the rails 11 in the extension direction A, and an ascending and descending mechanism 13 that is supported by the mobile carriage 12 and ascends and descends the scaffold.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a mobile elevating scaffold for working on high structures such as bridges, railway bridges, viaducts, buildings, etc.

Background Art

[0002] Conventionally, in the maintenance and repair of parapets and slabs under viaducts, and in the exterior wall construction of buildings such as workhouses and temporary repair warehouses, work is often carried out using aerial work platforms and suspended scaffolds.

[0003] However, in such forms of using aerial workers and suspended scaffolds, for example, when working on a viaduct with a long extension in the extension direction, it is necessary to sequentially move the aerial work platform and suspended scaffold along the extension direction while working. Moving the aerial work platform in the extension direction each time is not only inefficient, but also at least one lane of the road along the viaduct is prohibited from vehicle通行, resulting in a large impact on traffic associated with the work.

[0004] For this reason, conventionally, mobile elevating scaffolds as shown in Patent Documents 1 and 2 have been proposed. However, in the disclosed technology of Patent Document 1, although a lateral movement crane device is installed, the movable range in the extension direction of the crane device is only limited. Therefore, for a viaduct with a long extension in the extension direction, it is necessary to sequentially move the crane device itself in the extension direction again, and there is a problem that the inefficiency of the work itself cannot be completely eliminated. In addition, in the disclosed technology of Patent Document 2, since it is a technology premised on being used for conical body construction such as bridge piers and chimneys, it is not suitable for working while sequentially moving along a viaduct for elevated railways.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Japanese Patent Publication No. 2020-33713 [Patent Document 2] Japanese Patent Publication No. 2016-145488 [Overview of the project] [Problems that the invention aims to solve]

[0006] Therefore, the present invention was devised in view of the above-mentioned problems, and its objective is to provide a mobile lifting scaffold for working on tall structures, particularly a mobile lifting scaffold that can efficiently perform work on tall structures that are extended horizontally, such as elevated bridges used in elevated railways, maintenance depots, and repair depots. [Means for solving the problem]

[0007] The mobile lifting scaffolding according to the first invention is a mobile lifting scaffolding for working on a tall structure, comprising: a pair of left and right rails installed along the extension direction of the tall structure; a mobile trolley that travels independently along the rails along the extension direction; and a lifting mechanism supported by the mobile trolley for raising and lowering the scaffolding. The above rail is installed inside the channel steel. It is characterized by the following.

[0008] The movable lifting scaffolding according to the second invention is characterized in that, in the first invention, a plurality of movable trolleys are arranged on the rail at intervals from each other in the direction of extension, and the scaffolding is erected between lifting mechanisms supported by each of the plurality of movable trolleys.

[0009] The mobile lifting scaffolding according to the third invention is characterized in that, in the first or second invention, the mobile trolley is made up of multiple layers of H-shaped steel, and the lifting mechanism is attached to the uppermost layer of the stacked H-shaped steel.

[0010] The movable lifting scaffolding according to the fourth invention is, in the first or second invention, wherein at least two sets of rails are provided on the left and right sides, each being connectable to the other in the extension direction, and the movable platform Car's progressA key feature is that the rail located at the rear of the train can be reconnected to a position further forward.

[0011] The mobile lifting scaffolding according to the fifth invention is characterized in that, in the first or second invention, the mobile trolley has a screw hole that penetrates downward toward the rail, and a stopper member that can press against the rail via its lower end in accordance with screwing into the screw hole.

[0013] The 6 The mobile lifting scaffolding according to the invention is, 1 The invention is characterized in that a spacing member is installed between a pair of left and right channel steel sections on which the above-mentioned pair of left and right rails are installed, in order to maintain a constant distance between them.

[0014] The 7 The movable lifting scaffolding according to the invention is characterized in that, in the first or second invention, the lifting mechanism has a mast erected in the vertical direction, and further comprises a rod-shaped self-supporting reinforcing body that extends from the movable trolley toward the mast and is attached to it. [Effects of the Invention]

[0015] According to the first invention, once the workers have completed their work within the working area of ​​the scaffolding, the mobile trolley is moved along the rails towards the unworked area in the extension direction to align itself, and then the scaffolding is raised by the lifting mechanism to enable work in that area. This makes it possible to perform work on tall structures that are extended long in the lateral direction (extension direction A), such as elevated bridges used in elevated railways, maintenance depots, and repair depots.

[0016] According to the second invention, by erecting the scaffolding between lifting mechanisms supported by multiple mobile trolleys, it becomes possible to support the scaffolding more stably.

[0017] According to the third invention, by stacking H-shaped steel on this moving carriage, the overall center of gravity of the moving and elevating scaffold can be lowered downward. Thereby, when moving the moving carriage in the extension direction, it is possible to ensure movement in a stable state without the main body swaying.

[0018] According to the fourth invention, by continuously performing so-called replenishment, continuous construction in the extension direction can be realized.

[0019] According to the fifth invention, by rotating the stopper member, it becomes possible to firmly press the rail, and it can serve as a stopper that suppresses the self-running of the moving carriage on the rail.

[0020] The 1 invention and the 6 invention, it is possible to install the rail inside the channel steel and correctly adjust the distance between them while being guided by the spacing holding member with respect to the channel steel.

[0021] The 7 invention, by providing a self-supporting reinforcement, it is possible to reinforce the self-supporting property of the mast of the lifting mechanism through the self-supporting reinforcement, and it is possible to prevent the mast from swaying according to the lifting and lowering operation of the scaffold by the lifting mechanism.

Brief Description of the Drawings

[0022] [Figure 1] FIG. 1 is a perspective view showing an embodiment of a moving and elevating scaffold to which the present invention is applied. [Figure 2] FIG. 2 is a side view showing an embodiment of a moving and elevating scaffold to which the present invention is applied. [Figure 3] FIG. 3 is a view showing an example in which a pair of left and right rails are installed inside a channel steel. [Figure 4] FIG. 4 is a perspective view showing a moving carriage. [Figure 5] FIG. 5 is another perspective view showing a moving carriage. [Figure 6] ​ [Figure 7] Figure 7 is a diagram illustrating the lifting mechanism. [Figure 8] Figure 8 shows an example of attaching a lifting mechanism to a tall structure via wall ties. [Figure 9] Figure 9 illustrates an example of adding further self-supporting reinforcing elements. [Modes for carrying out the invention]

[0023] Hereinafter, one embodiment of the mobile lifting scaffolding according to the present invention will be described in detail with reference to the drawings.

[0024] Figure 1 is a perspective view showing an embodiment of the mobile lifting scaffolding 1 to which the present invention is applied, and Figure 2 is a side view thereof. The mobile lifting scaffolding 1 is used when working on a high structure 5. As an example of the high structure 5 referred to here, Figure 1 shows a railway viaduct as an example of the high structure 5, but it is not limited to this and also includes bridges and railway bridges on which vehicles run, depots, temporary repair depots and other buildings. The high structure 5 is assumed to be a structure that extends laterally, such as an elevated railway where the tracks are extended in the direction of length, but it is not limited to this and includes any structure.

[0025] As shown in Figure 1, the mobile lifting scaffolding 1 comprises a pair of left and right rails 11 installed along the extension direction A of the elevated structure 5, a mobile trolley 12 that travels independently along the extension direction on the rails 11 while maintaining a self-supporting height of, for example, 6.0 m, a lifting mechanism 13 supported by the mobile trolley 12, and a scaffolding 14 that can be raised and lowered by the lifting mechanism 13.

[0026] Each of the left and right rails 11 may be installed within a pair of left and right channel steel sections 81, as shown in Figure 3(a). In this case, a spacing member 82 may be installed between the left and right channel steel sections 81 to maintain a constant distance between them, as shown in Figure 3(b). The spacing member 82 is a metal tube with guide members 84 at both ends. The guide members 84 are configured with clamps for the spacing member 82, which is made of, for example, a pipe, and can be engaged with the rails 11 via these clamps. With the guide members 84 engaged with the channel steel sections 81, the entire spacing member 82 can be moved in the extension direction A in the figure, allowing the channel steel sections 81 to be guided by the spacing member 82 and their distance from each other to be correctly adjusted.

[0027] As shown in Figures 4 and 5, the mobile trolley 12 comprises metal wheels 21 with safety latches that run on rails 11, a base 22 that rotatably supports the wheels 21, multiple layers of H-shaped steel beams 23a and 23b stacked on the base 22, a height adjustment section 24 provided on the uppermost layer of the stacked H-shaped steel beam 23, and a lifting frame 25 that is raised and lowered by the height adjustment section 24. The lifting mechanism 13 described above is installed on this lifting frame 25.

[0028] The base 22 is made of a metal frame and is equipped with a rotational support mechanism (not shown) for rotatably supporting the wheels 21. One base 22 is provided for each of the left and right rails 11, separated from each other. On the front of each base 22, as shown in Figure 6, is a box-shaped connecting member 32 and a tubular body 33 (not shown) attached to the front of the connecting member 32, with a screw hole (not shown) that penetrates downwards. A stopper member 31 is screwed onto this tubular body 33. The stopper member 31 is configured to be able to move up and down relative to the screwed tubular body 33 by rotating a gripping portion that extends horizontally at its upper end. The lower end of the stopper member 31 is flattened and is configured to be able to press against the rail 11 in accordance with screwing it into the screw hole (not shown) in the tubular body 33. That is, by rotating this stopper member 31, it is possible to firmly press against the rail 11, and it can act as a stopper to prevent the mobile trolley 12 from moving on the rail 11. Note that the components of the stopper member 31, connecting member 32, and pipe body 33 are not essential and may be omitted.

[0029] The H-shaped steel beams 23 have flanges formed at both ends of the web. The lowest layer of H-shaped steel beams 23a are erected in pairs on separate bases 22 such that their longitudinal direction is approximately perpendicular to the extension direction A, and the two H-shaped steel beams 23b in the upper layer are erected on the two H-shaped steel beams 23a such that their longitudinal direction is the extension direction A. The H-shaped steel beams 23a and 23b of each layer are attached by bolting their flanges together during erection. The H-shaped steel beams 23 may be stacked in three or more layers, or they may consist of only one layer. The H-shaped steel beams 23 themselves are not essential and may be omitted. In such cases, the height adjustment section 24 will be mounted directly on the mobile trolley 12.

[0030] The height adjustment unit 24 is a mechanism that allows the height to be freely adjusted by screwing a male screw into a base provided with a female screw and rotating them together. As an alternative to this height adjustment unit 24, a cylinder configured to be able to move up and down based on hydraulics or the like may be used. By driving the height adjustment unit 24, the lifting frame 25 can be raised and lowered.

[0031] The lifting frame 25 is equipped with a height adjustment section 24 and at least a frame for mounting the lifting mechanism 13.

[0032] As shown in Figure 7, the lifting mechanism 13 comprises a mast 41 erected vertically on a mobile trolley 12 and a drive unit 42 attached to the mast 41. The drive unit 42 is configured to move up and down relative to the mast 41 by rotating a pinion gear with the driving force of a motor, and by meshing this pinion gear with a rack 43. Since the scaffolding 14 described above is provided on the drive unit 42, the scaffolding 14 can be raised and lowered through the vertical movement of the drive unit 42. As shown in Figure 8, the lifting mechanism 13 may also be attached to the high structure 5 via a wall tie member 47 connected to a member 46. The wall tie member 47 is attached to the high structure 5, for example, via an anchor member 48. By attaching such a wall tie member 47 to the high structure 5, the lifting mechanism 13 can be made more firmly stable relative to the high structure 5.

[0033] The height adjustment section 24, the lifting frame 25, and the lifting mechanism 13 themselves may be the same as those of a conventional lifting scaffold. By mounting this conventional lifting scaffold on the aforementioned mobile trolley 12, a mobile lifting scaffold 1 to which the present invention is applied may be constructed.

[0034] The scaffolding 14 is a deck on which workers can stand and perform work at height. The scaffolding 14 may be equipped with a fence to prevent falls. When actually performing work at height, workers can stand on the scaffolding 14 and raise the scaffolding 14 to the desired height by raising the drive unit 42 of the lifting mechanism 13 described above.

[0035] In the configuration shown in Figure 1, multiple mobile trolleys 12 are arranged on the rail 11 at intervals from each other in the extension direction A, and a scaffolding 14 is erected between the lifting mechanisms 13 supported on these mobile trolleys 12. This makes it possible to stably support the scaffolding 14 between the lifting mechanisms 13, which are arranged at intervals in the extension direction A, even if the scaffolding 14 is made longer in the extension direction A. However, the present invention is not limited to the case where the scaffolding 14 is erected between the lifting mechanisms 13 on multiple mobile trolleys 12, but also includes the case where the scaffolding 14 is provided on a lifting mechanism 13 provided on a single mobile trolley 12.

[0036] The mobile lifting scaffolding 1, with the configuration described above, is particularly effective when performing work on tall structures 5 that extend far to the side (extension direction A), such as elevated bridges used in elevated railways, maintenance depots, and repair depots. When workers have completed work within the area where work is possible on the scaffolding 14, the mobile trolley 12 is then moved along the rails 11 toward the unworked area in extension direction A. After aligning the mobile trolley 12 on the rails 11 toward the unworked area, the scaffolding 14 is raised by the lifting mechanism 13, making it possible to work in that area.

[0037] Therefore, it is desirable to pre-install the rails 11 along the elevated structure 5 which is extended horizontally (extension direction A). When actually performing work by sequentially moving the mobile trolley 12 toward extension direction A, a total of four rails 11 should be prepared, two pairs on each side. Of course, these rails 11 are configured to be connectable to each other toward the rear of the extension. When the mobile trolley 12 moves toward extension direction A, this can be achieved by reconnecting the rails on the rear side of the movement toward the front side of the 11, a so-called repositioning. By continuously performing such repositioning, continuous construction toward extension direction A can be achieved.

[0038] Thus, according to the present invention, even when working while sequentially moving the scaffolding 14 along the extension direction A, this can be achieved simply by moving the mobile trolley 12 on the rail 11, thereby further improving work efficiency. Furthermore, since this can be achieved by securing only an area with a width corresponding to the rail 11 along the elevated structure 5, the area on the road where work traffic is prohibited can be reduced, and the impact on traffic associated with the work can be further reduced.

[0039] Furthermore, according to the present invention, multiple layers of H-shaped steel beams 23 can be stacked on the mobile trolley 12, and the lifting mechanism 13 can be attached to the uppermost layer of the stacked H-shaped steel beams 23. By stacking these H-shaped steel beams 23 on the mobile trolley 12, the entire center of gravity of the mobile lifting scaffolding 1 can be lowered. This ensures that when the mobile trolley 12 is moved in the extension direction A, the main body does not swing and the movement is kept stable.

[0040] In addition to the above-described configuration, the present invention may further include the self-supporting reinforcing body 4 shown in Figure 9.

[0041] The self-supporting reinforcing body 4 is made of a metal rod, with its upper end attached to the mast 41 of the lifting mechanism 13 and its lower end attached to the mobile carriage 12. In the example shown in Figure 9, the self-supporting reinforcing body 4 is shown with its upper end attached to the mast 41 via a connecting member 46 and its lower end attached to the H-shaped steel 23 of the mobile carriage 12 via a connecting member 47, but it is not limited to this, and any connection method is possible.

[0042] By providing such a self-supporting reinforcing body 4, the self-supporting ability of the mast 41 can be reinforced via the self-supporting reinforcing body 4, and the mast 41 can be prevented from swinging in response to the raising and lowering operation of the scaffolding by the lifting mechanism 13. [Explanation of Symbols]

[0043] 1. Mobile lifting scaffolding 4 Self-supporting reinforcement 5 High structures 11 rails 12 Mobile cart 13 Lifting mechanism 14 Scaffolding 21 wheels 22 base 23 Shaped steel 24 Height adjustment section 25 Lifting frame 31 Stopper member 32 Joining members 33. Body 41 Mast 42 Drive unit 43 racks 46, 47 Joining members 81 Channel steel 82 Spacing member 84 Guide member

Claims

1. In a mobile, liftable scaffolding used for working on tall structures, A pair of left and right rails are installed along the extension direction of the above-mentioned elevated structure, A mobile trolley that travels autonomously along the rails in the direction of extension described above, It is equipped with a lifting mechanism that is supported by the above-mentioned mobile trolley and raises and lowers the scaffolding, The above rail is to be installed inside the channel steel. A mobile, liftable scaffolding system characterized by the following features.

2. Multiple of the above-mentioned mobile trolleys are arranged on the above-mentioned rail, spaced apart from each other in the direction of extension. The above scaffolding is erected between lifting mechanisms supported by multiple of the above-mentioned mobile trolleys. A mobile lifting scaffold according to claim 1, characterized by the above.

3. The above-mentioned mobile trolley is constructed by stacking multiple H-shaped steel beams, with the above-mentioned lifting mechanism attached to the uppermost layer of the stacked H-shaped steel beams. A mobile lifting scaffold according to claim 1 or 2, characterized by the above.

4. The above rails are provided in pairs, one on the left and one on the right, with at least two sets of rails that can be connected to each other in the direction of extension. The rail located on the rear side of the above-mentioned mobile trolley can be reconnected to a position further forward. A mobile lifting scaffold according to claim 1 or 2, characterized by the above.

5. The above-mentioned mobile trolley has a screw hole that penetrates downward toward the rail, and a stopper member that can press against the rail via its lower end when screwed into the screw hole. A mobile lifting scaffold according to claim 1 or 2, characterized by the above.

6. Between the pair of left and right channel steel sections on which the above-mentioned left and right rails are installed, spacing members are fitted to maintain a constant distance between them. A mobile lifting scaffold according to claim 1, characterized by the above.

7. The above lifting mechanism has a mast erected in the vertical direction, The mobile trolley is further equipped with a rod-shaped self-supporting reinforcing body that extends from the above-mentioned mobile trolley toward the above-mentioned mast and is attached to it. A mobile lifting scaffold according to claim 1 or 2, characterized by the above.

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