JP4634917B2 - Mobile suspension scaffolding - Google Patents

Description

  The present invention relates to a mobile suspension scaffold used during construction / repair work of a bridge such as a truss bridge. More specifically, the structural member of the bridge is used as a rail for movement, and can be assembled on site and has high stability. It relates to mobile suspension scaffolds.

  Conventionally, assembly and dismantling of structures such as truss bridges has been done by installing safety nets on the entire surface of the bridge and installing scaffolding plates in the form of bridges to prevent accidents caused by falling workers and tools. It is common to perform dismantling work.

However, the conventional assembly / disassembly work has the following problems.
<1> The size of the safety net increases with the length of the bridge and the width of the bridge, and the construction period and cost of the safety net also increase.

<2> When the scaffolding plate is installed in a safety net shape, a large shaking occurs, which is unstable and difficult to work.

  Accordingly, an object of the present invention is to provide a mobile suspension scaffold that can keep the installation period and cost low and that has a highly stable work scaffold.

The present invention made in order to solve the above-described problems includes a work floor for arranging below a bridge, a pair of side frames that cantilever-support the work floor from the left and right, and members constituting the bridge as rails. And a self-propelled part configured to be self-propelled as a mobile suspension scaffold that is suspended from a bridge and forms a work scaffold that is movable below the bridge. A movable part connected to a single connecting part in a cantilever provided on the upper part, a plurality of self-propelled means arranged around the movable part and configured to be capable of self-propelled on a component member of the bridge, and the self-propelled means A plurality of self-propelled means provided with tip ends of the single connecting portions along the bridge axis direction so that the movable portion always keeps the level of the work floor. one point by a single pin for the bridge axis direction in the central portion Characterized by being relatively movably pin connection, there is provided a mobile suspension scaffold.

The present invention can obtain at least one of the following effects by means for solving the above-described problems.
<1> Since it is not necessary to lay a scaffold such as a net under the entire bridge, it is economical in terms of construction period and construction cost.
<2> A member for laying a scaffold does not have to be attached to the bridge itself.
<3> takes equally load all wheels by the center of the plurality of self-propelled means provided along the bridge axis direction to the support at one point by a single pin, the wheel off the bridge deviates hardly stability Is expensive. Even if the free-running part moves slightly to the left and right due to shaking during movement, it operates without any problem.
<4> Simplification of the structure and weight reduction of the entire apparatus can be achieved, and assembly on site is easy.
<5> Since the center of a plurality of self-propelled means provided along the bridge axis direction and the side frame are connected by a single pin so that they can move relative to each other, the work platform is always kept horizontal regardless of the slope of the bridge. Can do.
<6> By changing the wheel width of the self-propelled means , it can be applied to various bridges and can be used at various sites.
<7> By using a manual self-propelled means, there are few trouble factors such as malfunctions and safety is high, and periodic inspection is easy.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<1> Overall Configuration In FIG. 1, the overall configuration of the mobile suspension scaffold according to the present invention will be described.
The mobile suspension scaffold according to the present embodiment includes a work floor 2 for hanging below a bridge, a set of side frames 3 that cantilever-support the work floor 2 from the left and right (bridge width direction), and a bridge. These components are, for example, a self-propelled portion 4 configured to be capable of self-propelled with the main structure 1 as a rail, and each member is divided and transported and assembled on site. Each component of the present invention will be described below.

<2> Work floor 2
The work floor 2 is a unit-type scaffold that can be assembled and disassembled, and is configured in an elongated rectangular shape that is substantially larger than the bridge width.
As shown in FIG. 1, the work floor 2 is assembled by spanning and connecting an aluminum scaffolding plate to a work floor frame and bolting a fixing plate thereon. A handrail for the safety of workers is provided on the scaffolding board.

<3> Side frame 3
One side frame 3 is provided on each side of the main structure 1 (in the width direction of the bridge), and is cantilevered so that the work floor 2 is suspended below the bridge. The side frame 3 and the work floor 2 have a known assembly mechanism that can be easily connected by pins and bolts. It can be assembled on site. At the upper part of the side frame 3, a connecting part 31 provided with a pin hole 311 for soft connection with the self-running part 4 is provided.

Further, in order to fix the side frame and the main structure 1, an adjuster unit 32 and a locking lever 33 may be provided.
As shown in FIG. 4A, the adjuster unit 32 rotates the handle to press the main structure, and the side frame 3 and the main structure 1 are fixed by the pressing force, thereby suppressing the shaking of the bridge. it can.
As shown in FIG. 4B, the locking lever 33 is a lever-shaped member having one end rotatably attached to the side frame 3 and a notch-shaped locking portion at the other end.
When the suspension scaffold of the present invention is moved, the locking lever 33 is released, and when the work is performed with the suspension scaffold of the present invention stopped, the locking lever 33 is rotated and locked to the main structure 1 . Then, the object is to fix the side frame 3 and the main structure 1 to prevent the side frame 3 from shaking and moving.

Further, as shown in FIG. 5, the side frame 3 guide rollers 3 4 may be previously provided with. By configuring so as to sandwich the Shu構1 by with the guide rollers 3 4 free-running means 42 of the self-propelled unit 4, it is possible to enhance the stability during suspension scaffold mobile.

<4> Self-propelled part 4
As shown in FIGS. 2 to 3, the self-propelled portion 4 includes a movable portion 41 having a structure that is connected to the connecting portion 31 of the side frame 3 so as to be relatively movable, and a main structure 1 that is a structural member of a bridge. The self-propelled means 42 capable of self-propelling and the transmitting means 43 for applying a rotational force to the self-propelled means 42 are provided. Details of each component will be described below.

[Moving part 41]
The movable part 41 uses a member having a structure that can be connected to the side frame 3 so as to be relatively movable, for example, a pivot structure or a structure that can be supported by pin connection.
As shown in FIG. 2, the movable portion 41 is softly connected by inserting a pin 411 exhibiting an axial direction parallel to the moving direction of the self-running portion 4 into a pin hole 311 provided in the connecting portion 31 of the side frame. In addition, the work floor can always be kept horizontal regardless of the gradient of the bridge, and the stability of the suspended scaffolding during movement of the suspended scaffolding and during maintenance work can be improved.

Moreover, the movable part 41 should just be a structure which the self-propelled part 4 and the side frame 3 can move relatively , and besides the pin connection of a present Example, as shown in FIG. 6 , for example, as shown in FIG. A shaft portion 312 may be provided at the tip of the connector, and the connecting portion 31 itself may be handled like a pin.

[Self-propelled means 42]
Self-propelled means 42 consists of a wheel provided so that pin 411 of movable part 41 may be located in the center. The wheel is made of a well-known material such as urethane rubber, and is provided in a total of four positions at symmetrical positions on the front, rear, left and right with the pin 411 of the movable portion 41 as the center, corresponding to the rotation direction of the chain 432 of the transmission means 43. It is configured using a known mechanism so that positive rotation and negative rotation are possible.
By setting the central part of the main body of the self-propelled portion 4 as a pin-supported portion of the movable portion 41, it is possible to always apply a load evenly to the four wheels, and to improve the stability of the self-propelled portion 4.

[Transmission means 43]
The transmission means 43 includes a hand wheel 431 provided on a side portion of the self-running portion 4 main body and a chain 432 that spans the hand wheel 431. When an operator pulls the chain 432, the handwheel 431 is rotated and the rotational force is transmitted to the self-propelled means 42.
The transmission means 43 desirably employs a manual transmission mechanism. This is because the manual transmission mechanism has many advantages compared to an automatic transmission mechanism such as a prime mover, such as easy fine adjustment of speed, simplification of the structure without a power source.

  As described above, the mobile suspension scaffold according to the present invention applies a load evenly to the wheels rotating on the main structure 1 of the bridge, so that the wheels are not easily detached from the bridge and have high stability, and the work floor 2 and the side frame 3 Is relatively movable with the self-propelled portion 4. The work floor 2 can always be kept horizontal, and bridge maintenance work and the like can be performed safely.

Schematic of the mobile suspension scaffold of the present invention. The perspective view of the self-propelled part of the mobile suspension scaffold of this invention. The side view of the self-propelled part of the mobile suspension scaffold of the present invention. The figure which shows the fixing method of the mobile suspension scaffold of this invention, and a bridge. The figure which shows the guide method of the mobile suspension scaffold of this invention, and a bridge. The figure which shows the other Example of the movable part of the mobile suspension scaffold of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main structure 2 Work floor 3 Side frame 31 Connection part 311 Pin hole 312 Shaft 32 Adjuster unit 33 Locking lever 34 Guide roller 4 Self-propelled part 41 Movable part 411 Pin 42 Self-propelled means 43 Transmission means 431 Handwheel 432 Chain

Claims (1)

A work floor for placing under the bridge, a pair of side frames that cantilever-support the work floor from the left and right sides, and a self-propelled portion that is configured to be able to self-propell as a member constituting the bridge as a rail. A mobile suspension scaffold that hangs from a bridge and forms a work scaffold that is movable below the bridge,
The self-propelled part is a movable part connected to a single connecting part in a cantilever provided on the upper part of the side frame;
A plurality of self-propelled means arranged around the movable part and configured to be capable of self-propelled on the structural members of the bridge,
Transmission means for transmitting rotational force to the self-propelled means,
In order that the movable part always keeps the level of the work floor, the tip of the single connecting part is a single part oriented in the bridge axis direction at the center of the plurality of self-propelled means provided along the bridge axis direction. It is characterized by being connected to a pin so that it can move relative to one point with a pin.
Mobile hanging scaffold.

Images