JP2017115569A - Hanging scaffold for bridge, and installation method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable shortening of time for temporary hanging scaffold installation work in work for the investigation, inspection and repair of a structure such as a bridge, enable securement of safety and labor saving, and prevent a hindrance to general vehicle traffic after installation.SOLUTION: A scaffold stage member crossing a bridge on the undersurface side of the bridge is provided. A hanging scaffold body frame 6, the upper part of which is provided with a support part 8 for mounting a support leg member 7 for making it grounded on a road surface of the bridge and the lower part of which is provided with a stage holder part 10 capable of connecting and holding the scaffold stage member, is provided.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a suspension scaffold for bridges and a method for installing a suspension scaffold for bridges.

  Conventionally, as a suspension scaffold for bridges as described above, for example, one described in Patent Document 1 is known. In such a conventional construction method, when performing work such as inspection and repair of a narrow-width bridge, a temporary scaffold suspended from a bridge frame by a chain is used on the entire surface under the bridge. However, it is very dangerous and requires skill because of the work carried out by workers, and the work time has been increased due to the length of the bridge.

  Further, for example, a “bridge inspection vehicle (dedicated machine with hydraulic control for truck mounting)” as shown in Patent Document 2 is used, and the work floor is moved to the lower surface of the bridge to enable investigation and the like. In such a case, although it is safe and the installation time is significantly shortened, traffic control is necessary because the bridge inspection vehicle occupies the passage of ordinary bridge vehicles.

Japanese Patent Application Laid-Open No. 7-11764 JP 2002-187692 A

  In view of such a conventional situation, the present invention can reduce the installation work time of a temporary suspension scaffold in the investigation, inspection, and repair work of a structure such as a bridge, and can ensure safety and labor saving. It is an object to provide a suspension scaffold for a bridge and a method for installing the suspension scaffold for a bridge that do not hinder the passage of vehicles.

  The characteristic structure of the first suspension suspension for a bridge according to the present invention is that a scaffold stage member that crosses the bridge is provided on the lower surface side of the bridge, and a support portion for attaching a support leg member for grounding to the road surface of the bridge And a suspended scaffolding body frame provided with a stage holder part capable of connecting and holding the scaffolding stage member at the lower part.

According to the first characteristic configuration of the present invention, while the suspension scaffold main body frame is suspended in a vertical posture by a crane or the like, the support leg member is grounded on the road surface of the bridge in the upper part and the lower surface of the bridge is in the lower part. By arranging the scaffold stage member connected to the stage holder portion on the side, the repair and inspection of the bridge can be performed safely and easily.
Moreover, after the support leg member is grounded on the road surface of the bridge, the scaffold stage member is suspended by the suspension scaffold body frame, so that the passage of ordinary vehicles on the bridge is not obstructed, and traffic regulations are set when setting the suspension scaffold. There is no need to do.

  According to a second characteristic configuration of the present invention, the scaffold stage member is assembled to the stage holder portion so that one end portion of the scaffold stage member can be withdrawn and retracted toward the widthwise central portion of the bridge. is there.

  According to the second characteristic configuration of the present invention, in addition to being able to achieve the above-described operational effects according to the first characteristic configuration of the present invention, the scaffold stage member is provided with a stage holder portion and one end portion of the bridge. Because it is assembled so that it can be moved back and forth toward the center in the width direction, when installing a suspended scaffolding, there is no need to assemble a scaffolding stage member. When placing the suspension scaffold body frame outside the bridge while suspending it with a crane, etc., retract the scaffold stage member to the outside so that it does not interfere with the railing of the bridge, etc. If it moves so that it may protrude below, installation and repair inspection work can be performed smoothly in a short time.

  According to a third characteristic configuration of the present invention, in the state in which the support portion has the suspension scaffold main body frame arranged on the lateral outer side of the bridge, the support leg member is attached to the road surface of the bridge so as to be groundable. Extending from the upper part of the suspension scaffold body frame toward the center in the width direction, the entire center of gravity is formed so as to be located between the grounding portion of the support leg member and the suspension scaffold body frame. By the way.

  According to the third characteristic configuration of the present invention, since the center of gravity position is formed so as to be located between the grounding portion of the support leg member and the suspension scaffold body frame, the suspension scaffold member body It is easy to stably support the scaffold stage member assembled to the frame, and safety can be improved.

  According to a fourth characteristic configuration of the present invention, the support leg member is provided with a caster at a ground contact portion with respect to a road surface of the bridge, and the suspension scaffold main body frame is configured to be movable in a longitudinal direction of the bridge. .

  According to the fourth characteristic configuration of the present invention, for example, the suspended scaffold main body frame and the scaffold stage member can be joined together by the casters provided on the support leg member without arranging the scaffold on the entire lower work area of the bridge. Therefore, the bridge can be easily repaired and inspected over a wide range with a small number of members, and workability can be improved.

  According to a fifth characteristic configuration of the present invention, the caster is attached to the support leg member so that the vertical position can be adjusted relative to the support portion.

According to the fifth characteristic configuration of the present invention, by adjusting the casters up and down, the stage height of the scaffold stage member can be finely adjusted. Therefore, the repair and inspection work for the lower surface of the bridge can be facilitated.
Also, when moving the suspended scaffold body frame by casters along the bridge, even if there are obstacles on the lower surface of the bridge, the stage height can be changed by changing the vertical position of the casters, and the scaffold body frame can be easily Can be moved.
In addition, by relatively adjusting the vertical position of the casters, it is possible to easily dodge the bridge parapet when the suspension scaffold main body frame is installed on the bridge.
In other words, suspend the suspension scaffold body frame with a crane, etc., ground the caster to the bridge road surface over the railing from the outside of the bridge, and shrink the caster when entering the scaffold stage member under the bridge. By retracting upward, the caster and the scaffold stage member can be installed at a predetermined position without interfering with a part of the bridge.

  According to a sixth characteristic configuration of the present invention, the suspension scaffold main body frame is provided with an expansion / contraction portion that allows a vertical separation distance between the support portion and the stage holder portion to be freely changed.

According to the sixth characteristic configuration of the present invention, the relative position adjustment of the scaffold stage member with respect to the bridge lower surface can be set by simply adjusting the vertical position of the stage holder portion by the expansion and contraction portion, thereby improving workability. .
Further, by adjusting the vertical position of the scaffold stage member with respect to the lower surface of the bridge by adjusting the telescopic portion, it is possible to cope with bridges of various girder heights.

  According to a seventh characteristic configuration of the present invention, a bridge side outrigger that is in contact with and supported by the bridge side face is provided on the suspension scaffold body frame.

  According to the seventh characteristic configuration of the present invention, when the suspension scaffold body frame is installed, the bridge side surface outrigger is brought into contact with and supported by the bridge side surface, so that the vertical suspension posture can be stabilized. In addition, it is possible to stably support the scaffold stage member by the stage holder portion, and to improve work safety.

  According to an eighth characteristic configuration of the present invention, the suspension scaffold body frame is provided with a hinge portion that allows a middle portion in the longitudinal direction to be folded.

According to the eighth characteristic configuration of the present invention, by folding the intermediate part in the longitudinal direction of the suspension scaffold main body frame by the hinge part, the whole becomes compact, and the load on the scaffold transfer truck is lowered and transported. Easy to do.
In addition, when installing the scaffold, for example, when it stands up vertically with a crane, it becomes a rotation around the hinge part, suppressing the side runout of the entire suspended scaffold, etc., improving stability and improving safety, and easy installation Time can be shortened.

  A ninth characteristic configuration of the present invention is that, when a pair of the suspended scaffold main body frames are disposed on the left and right sides of the bridge at the widthwise center side end portion of the bridge in the scaffold stage member, each stage The scaffold stage member connecting portion that can freely connect the scaffold stage members assembled to the holder portion is provided.

  According to the ninth characteristic configuration of the present invention, when installing a pair of suspended scaffold main body frames on the left and right sides of the bridge, the respective scaffold stage members assembled to them are coupled and integrated by the scaffold stage member coupling portion. By doing so, a scaffold stage member can be stabilized more and the safety | security in the operation | work on a scaffold stage can be improved further.

  According to a tenth characteristic configuration of the present invention, when a pair of the suspension scaffold body frames are disposed on the left and right sides of the bridge at the upper end portion of the suspension scaffold body frame, the pair of suspension scaffold body frames are connected to each other. The first main body frame connecting portion is provided so as to be connected and integrated.

  According to the 10th characteristic structure of this invention, since the gravity center position of the whole is formed so that it may be located between the grounding part of the said supporting leg member, and the said suspension scaffold main body frame, it is the suspension scaffold main body frame. When the moment of the lower part of the frame tends to tilt toward the inside of the bridge, the scaffold stage member becomes unstable, and the connection member is connected to the first body frame connection part provided in each of the pair of suspended scaffold body frames. By connecting and integrating, the postures of the suspended scaffolding main body frames are stabilized, so that it is possible to safely work on the scaffolding stage member.

  According to the eleventh feature of the eleventh method of installing a suspension scaffold for a bridge of the present invention, a pair of bridge suspension scaffolds according to claim 1 is prepared, and one of the suspension suspension scaffolds of the pair is suspended. While suspending the scaffold main body frame in a vertical orientation, it is arranged outside the bridge across the railing on one side of the bridge, and the support leg member is grounded on the road surface of the bridge, and the other While suspending the suspension scaffold body frame of the suspension scaffold for a bridge in a posture along the vertical direction, the suspension scaffold is disposed outside the bridge across the balustrade on the other side of the bridge, and the support leg member is disposed on the road surface of the bridge. And the scaffold stage member is connected and held between the stage holder portions of each of the bridge suspension scaffolds.

  According to the eleventh characteristic configuration of the present invention, the installation work time of the temporary suspension scaffold in the investigation, inspection and repair work of structures such as bridges can be shortened by a simple installation process, and safety and labor saving are achieved. In addition, it is no longer necessary to restrict the passage of ordinary vehicles after installation.

It is a perspective view which shows the conveyance figure of the suspension scaffold which concerns on this invention. It is a perspective view which shows the state which expand | deployed the suspension scaffold which concerns on this invention. It is a front view which shows the state which installed the suspension scaffold which concerns on this invention in the bridge. It is a perspective view of an upper ladder part. It is a partial expansion perspective view near a ladder part. It is a perspective view of a slide roller holder frame. It is a perspective view of a slide type stage. It is a partial expansion perspective view of a docking part vicinity. It is a figure explaining conveyance of a suspension scaffold. It is a figure explaining construction raising of a suspended scaffold. (A) is a figure which shows the completion state of construction of a suspension scaffold, (b) is a figure explaining the slide of a stage. It is a figure explaining the movement to the bridge side of a suspension scaffold. It is a figure explaining installation of an outrigger. It is the elements on larger scale near the road surface outrigger with a running wheel. It is the elements on larger scale near the bridge side surface outrigger with a guide wheel. It is a figure explaining adjustment of an upper rubber part. It is a figure explaining adjustment of a stage part. It is a figure which shows installation of the other suspension scaffold. It is a figure which shows the installation completion state of a suspension scaffold. It is a perspective view which shows the installation state of the suspension scaffold of another embodiment. It is a front view which shows the installation state of the suspension scaffold of another embodiment. It is a perspective view of the suspension scaffold of another embodiment. It is a disassembled perspective view of the suspension scaffold of another embodiment. It is principal part action explanatory drawing of a hanging scaffold. It is a principal part front view which shows the effect | action description of the suspension scaffold of another embodiment. It is a front view of the suspension scaffold of another embodiment. It is a side view which shows the effect | action description of the suspension scaffold of another embodiment, (a) is the state which retracted the caster, (b) shows the state which protruded the caster below. It is a front view of the suspension scaffold of another embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1 to FIG. 19, a scaffold stage member that crosses the bridge is provided on the lower surface side of the bridge, and a support portion 8 for attaching a support leg member 7 for grounding to the road surface of the bridge is provided at the upper portion. And the suspension scaffold for bridges which comprises the suspension scaffold main body frame 6 provided with the stage holder part 10 which can connect and hold the said scaffold stage member in the lower part is comprised.

  The suspended scaffold body frame 6 is provided with an upper ladder portion 2 including an upper frame 21 and a ladder portion 22 that is fitted into the upper frame 21 and is held up and down freely. 2 is provided with a slide roller holder frame 3 that can be folded up and down via a hinge portion 9.

  The stage holder portion 10 is constituted by a holder frame frame 33 in the slide roller holder frame 3, and one end portion of the slide stage 4, which is an example of a scaffold stage member, can be moved back and forth toward the center in the width direction of the bridge 100. Is assembled.

As an example, the support leg member 7 is provided with a road surface outrigger 21a with a traveling wheel that is supported and suspended on the bridge road surface 101 and can be manually moved in the longitudinal direction Y of the bridge, and a caster 11 is attached as the traveling wheel.
In a state where the suspension scaffold main body frame 6 is arranged on the laterally outer side of the bridge 100, the suspension portion scaffold 8 is directed toward the center in the width direction of the bridge 100 in order to attach the support leg member 7 to the road surface of the bridge 100 so as to be able to be grounded. A support leg member 7 is attached to the support portion 8 so as to extend from the upper portion of the main body frame 6, and the entire center of gravity position is located between the grounding portion of the support leg member 7 and the suspension scaffold body frame 6. It is formed to do.

Next, the present invention will be described in more detail with reference to the accompanying drawings as appropriate.
[Overview of suspended scaffolding]
As shown in FIGS. 1 to 3, the suspension scaffold 1 according to the present invention retracts and stands up the upper ladder portion 2 having an expansion / contraction function so that the girder height H of the bridge 100 can be adjusted, and the upper ladder portion 2. A rotating roller bracket 22a for fixing, a fixing bracket 22b for fixing after standing, and a slide frame holder 33 including a holder frame frame 33 of a roller 32 for sliding the slide stage 4 constituting the scaffold stage member. The frame 3 and the slide stage 4 that can be slid with a light force by the roller 32 so as to be adjusted to the beam width W of the target bridge 100 are configured.

[Overview of upper ladder part 2]
1-4, the upper ladder part 2 is supported by a road surface outrigger 21a with a traveling wheel that is supported and suspended on the bridge road surface 101 and can be moved manually in the longitudinal direction Y of the bridge, and is supported by striking the bridge side surface 103. A bridge side outrigger 21b with a guide wheel is provided which travels and guides along the bridge side surface 103.
Further, the upper ladder portion 2 is rotated as an upper frame 21 extending downward so as to be suspended from the bridge side surface 103 and a hinge portion 9 for storing the upper ladder portion 2 so that the upper ladder portion 2 is folded so as to be stored during transportation. A ladder part 22 having a shaft metal part 22a and a fixing metal part 22b that can be fixed after standing up and sliding in parallel with the upper frame 21 according to the girder height H of the bridge 100 and changing the connection position. It consists of

As shown in FIGS. 3 to 5, the upper frame 21 is grounded to a bridge road surface 101 by a caster 11 attached to a road surface outrigger 21 a with a traveling wheel, and extends below the bridge balustrade 104 and below the bridge (vertical direction Z). Presents. The housing also serves as a ladder for the worker to move up and down to the bridge lower surface side 102.
Further, the upper frame 21 has a traveling wheel road surface outrigger 21a for moving the bridge manually in the longitudinal direction Y of the bridge 100 along the longitudinal direction of the bridge 100 and for stability in order to progress the work and change the installation location. In order to be stabilized along the bridge side surface 103, a bridge side outrigger 21b with a guide wheel attached with casters 13 is provided.
Therefore, each outrigger can be folded and stored, for example, as shown in FIG. 1 so as not to take up a large space when loaded on the truck 5 with a simple crane.

  The upper ladder portion 2 has a structure in which the length is expanded and contracted so that the slide stage 4 can be operated on the bridge lower surface side 102 by the bridge girder height H. As shown in FIGS. 4 and 5, the upper frame 21 and the ladder portion 22 are guided by a ladder portion slide guide 22 c and can be expanded and contracted, and the bridge girder height H can be adjusted. In the case of positioning, it is fixed by a slide lock bolt / nut 22d.

[Outline of slide roller holder frame 3]
As shown in FIG. 6, the slide roller holder frame 3 includes a rotating shaft fitting 31 a and a fixing fitting 31 b that can be fixed by a pin after standing up as a hinge portion 9 for raising and lowering the upper ladder portion 2. Conventionally, when a long weight member such as the upper ladder part 2 is built up from a state in which it is laid down, a part of the lower part of the member is built up with a crane while being grounded to the ground. There is a risk of side swaying.
However, in the present invention, since the rotary shaft fitting 31a and the rotary shaft fitting 22a are connected via the shaft, the rotation for building the shaft on the fulcrum occurs, and the crane operation is facilitated and the risk can be reduced.
That is, the rotating shaft bracket 22a and the fixing bracket 22b provided in the ladder portion 22 and the fixing bracket 31a and the fixing bracket 31b provided in the slide roller holder frame 3 constitute the hinge portion 9 of the suspension scaffold body frame 6. Yes.

In order to install the upper ladder portion 2 on the bridge side surface 103, the slide stage 4 is projected on the bridge road surface 101 in advance to the side of the bridge so as not to interfere with the bridge 100.
After installing the upper ladder part 2, the worker descends from the upper ladder part 2 to the slide stage 4, and pushes and pulls the slide roller holder frame 3 to take a reaction force by hand and to walk on the slide stage 4. As shown in FIG. 6, the structure is made up of a holder frame 33 in which two sets of 10 rollers 32 that are in contact with all directions of the frame frame 41 of the slide stage 4 are arranged on the frame so as to easily slide. It is configured.

[Outline of sliding stage 4]
As shown in FIG. 7, the slide stage 4 includes a frame 41 and a work floor 42. The suspension scaffold 1 is installed from the left and right side surfaces 103 of the bridge 100, respectively, and a stage (work floor) that crosses the bridge 100 is formed on the bridge lower surface side 102.

At one end of the frame frame 41, as shown in FIG. 8, in order to connect the left and right slide stage 4 to the frame frame 41 at the center of the bridge lower surface side 102, a docking portion is used as the scaffold stage member connecting portion 12. The female metal fitting 43a and the docking part male metal fitting 43b are provided. Thereby, it is devised so that it is easy to dock even if a positional deviation occurs.
Further, an end locking hook 44 is provided at the end of the frame 41 so that the left and right sliding stages 4 can be fixed with a lever block (registered trademark) or the like.

[Overview of suspension scaffold installation process]
[Working procedure 1] (Fig. 9)
The two suspension scaffolds 1 are loaded into the loading platform of the truck 5 with a simple crane in a retracted state, stopped at the center in the width direction X of the target bridge 100 in parallel with the longitudinal direction Y of the bridge 100 of the bridge 100, The crane outrigger 52 is operated and installed.

[Working procedure 2] (FIG. 10)
The crane 51 is prepared for installation so that it can be suspended, the upper ladder portion 2 whose length is adjusted in advance to the girder height H of the target bridge 100, the main body suspension wire 22f connected to the suspension bracket 22e, and the crane suspension hook. Suspend on 53. At this time, it can be built with the rotating shaft fitting 22a and the rotating shaft fitting 31a as fulcrums.
8 to 11, 14, and 15, only one suspension scaffold 1 is represented on the loading platform of the truck 5 with a simple crane, but this is only for easy understanding of the illustration, and in fact, the other suspension platform 1 is illustrated. Scaffold 1 remains loaded.

[Working procedure 3] (FIG. 11)
The built-up upper ladder portion 2 is fixed by fastening the fixing bracket 22b and the fixing bracket 31b with bolts and nuts. At this time, the crane 51 is operated, and the slide type stage 4 is slid so as to project to the outside of the bridge so as to be easily installed on the bridge lower surface side 102 as shown in FIG.

[Working procedure 4] (FIG. 12)
The crane 51 is operated to move the suspension scaffold 1 prepared in the work procedure 3 to the bridge side surface 103 in a state as shown in FIG.

[Work Procedure 5] (FIGS. 13 to 15)
The crane 51 is operated so that the worker can touch the suspension scaffold 1 from the road surface 101 of the bridge 100, and the suspension scaffold 1 is brought close to the bridge balustrade 104 and stopped. Subsequently, the traveling wheel-attached road surface outrigger 21a stored for conveyance is rotated and locked by the lock hook lever 22g as shown in FIG. As shown in FIG. 15, the bridge side outrigger 21b with guide wheels is set and fixed with a lock bar 22h.

[Working procedure 6] (FIG. 16)
The crane 51 is operated so that the suspension scaffold 1 that has completed the work procedure 5 is positioned in front of the loading platform of the truck 5 with the simple crane, and the wheels of the road outriggers 21a with the traveling wheels of the suspension scaffold 1 are grounded to the bridge road surface 101. The guide wheels of the bridge side outriggers 21b with guide wheels are grounded to the bridge side surface 103 and installed so that the upper ladder portion 2 is vertical.

[Working procedure 7] (FIG. 17)
After completing the work procedure 6, with the crane 51 suspended, the hook 56 of the loading platform of the truck 5 with the simple crane of the suspension scaffold 1 and the hook 22i for temporary fixing of the upper frame 21 are temporarily fixed to the wire 54 and the lever block (registered). Trademark) 55 is used to temporarily fix the front and rear at two places. After confirming the temporary fixing, the crane 51 is operated to remove the crane hanging hook 53 and the main body hanging wire 22f.
Next, the worker descends to the slide stage 4 via the upper ladder part 2. The worker slides so that the tip of the slide type stage 4 comes to substantially the center of the bridge 100 so as to walk on the work floor 42 by obtaining a reaction force by the slide roller holder frame 3.

[Working procedure 8] (FIG. 18)
Subsequently, the other suspension scaffold 1 is similarly performed in the operation steps 2 to 7, and the left and right slide type stages 4 and 4 are butt-joined with the docking female fitting 43a and the docking male fitting 43b, respectively, and the respective locking hooks are connected. 44 is fixed using a lever block (registered trademark) 55.

[Working procedure 9] (FIG. 19)
The temporary fixing wire 54 and the lever block (registered trademark) 55 temporarily fixed in the work procedure 7 are removed. The installation of the suspension scaffold 1 is now complete. And the crane outrigger 52 is stored and the truck 5 with a simple crane leaves.

  After that, we will investigate, inspect and repair bridge structures. As the work progresses, the suspension scaffold 1 is manually moved in the bridge longitudinal direction Y using the wheels of the road surface outriggers 21a with traveling wheels. The passage portion of the bridge 100 allows passage of ordinary vehicles as usual only by speed restriction by the withdrawal of the truck 5 with the simple crane.

Finally, the possibilities of yet another embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the member similar to the above-mentioned embodiment.
[Another embodiment]
1. In the above embodiment, the scaffold stage member is configured to be slidable by the slide stage 4 shown in FIG. 1 to FIG. 8 and FIG. 24, but not limited to the slide type, as shown in FIG. After the suspension scaffolds 1 and 1 are installed on both sides of the bridge 100, the truss member that forms a bridge unit with a length extending between the left and right holder frames is spanned as one scaffold stage member. Is also possible. However, the said embodiment is excellent in the point of safety | security and workability.
The slide mechanisms and connecting means are merely examples, and various modifications can be made without departing from the gist of the present invention.
2. As shown in FIGS. 27A and 27B, the caster 11 may be attached to the support leg member 7 so that the vertical position of the caster 11 can be adjusted relative to the support portion 8. By adjusting the caster 11 up and down, the stage height of the scaffolding stage member can be finely adjusted. Therefore, the repair and inspection work for the lower surface of the bridge can be easily performed.
In other words, suspend the suspension scaffold body frame with a crane, etc., ground the caster to the bridge road surface over the railing from the outside of the bridge, and shrink the caster when entering the scaffold stage member under the bridge. By retracting upward, the caster and the scaffold stage member can be installed at a predetermined position without interfering with a part of the bridge.
3. When a pair of suspended scaffolding body frames 6 are disposed on the left and right sides of the bridge 100 at the upper end of the suspended scaffolding body frame 6, as shown in FIGS. The first main body frame connecting portion 16 that can be connected and integrated via the wire 15 may be provided. In this case, the entire center of gravity position is determined by the grounding portion of the supporting leg member 7 and the suspended scaffolding main body frame 6. Since the moment that the lower part of the suspended scaffolding main body frame 6 is inclined to the inside of the bridge 100 tends to work, the scaffold stage member becomes unstable. By connecting and integrating the wire 15 as a connecting member to the first main body frame connecting portion 16 provided in each of the pair of suspended scaffolding main body frames 6, the posture of each of the suspended scaffolding main body frames 6 is stabilized, and thus the scaffold can be safely secured. Work can be performed on the stage member.
4. When a pair of suspension scaffolds 1 for the bridge is provided and a pair of suspension scaffold body frames 6 are arranged on both the left and right sides of the bridge 100 as shown in FIG. A bridge suspension scaffold device provided with a rigidly connectable connection frame 14 may be configured. In this case, after a pair of bridge suspension scaffolds 1 are arranged on both the left and right sides of the bridge 100, By rigidly connecting the upper parts of the pair of suspended scaffold body frames 6 with the coupling frame 14, the pair of suspended scaffolds 1 become strong, and can stably support the worker against fluctuations in the load applied to the scaffold stage member, Safety can be further improved.
In other words, the scaffold stage member attached to each of the pair of bridge suspension scaffolds is stable even if the scaffold stage members are fully retracted from the lower side of the bridge and extended outward. Even when a pair of bridge suspension scaffolds connecting stage members are moved along the longitudinal direction of the bridge to change the inspection and repair position, even if the bridge piers become obstacles, each scaffold stage member is If they are separated from each other and project outward, they can be continuously operated while moving over the obstacle piers without re-establishing the suspension scaffold body frame with a crane.

  The present invention can be used, for example, as a temporary suspension scaffold in a structure inspection / inspection / repair work of a small-scale bridge having a bridge width of less than 5 m.

DESCRIPTION OF SYMBOLS 1 Suspension scaffold 6 Suspension scaffold main body frame 7 Support leg member 8 Support part 9 Hinge part 10 Stage holder part 11 Caster 12 Scaffold stage member connection part 14 Connection frame 15 1st main body frame connection part

Claims (11)

Provide a scaffold stage member that crosses the bridge on the lower surface side of the bridge,
A bridge provided with a suspension scaffold main body frame having a support portion for attaching a support leg member for grounding to the road surface of the bridge at the upper portion and a stage holder portion capable of connecting and holding the scaffold stage member at the lower portion. Suspended scaffold.   The suspension scaffold for bridges according to claim 1, wherein the scaffold stage member is assembled to the stage holder portion so that one end portion of the scaffold stage member can be withdrawn and retracted toward the center in the width direction of the bridge. In the state where the suspension scaffold main body frame is disposed on the lateral outer side of the bridge, the support portion is configured to face the center side in the width direction of the bridge so as to attach the support leg member to the road surface of the bridge in a groundable manner. It extends from the top of the body frame,
The foot suspension for a bridge according to claim 2, wherein the entire center of gravity is formed so as to be positioned between the grounding portion of the support leg member and the suspension scaffold body frame.   The support leg member is provided with a caster at a ground contact portion with respect to a road surface of the bridge, and the suspension scaffold main body frame is configured to be movable in a longitudinal direction of the bridge. Suspended scaffold for bridges as described.   The bridge suspension scaffold according to claim 4, wherein the caster is attached to the support leg member so that the vertical position of the caster can be adjusted relative to the support part.   The suspension scaffold for bridges according to any one of claims 1 to 5, wherein the suspension scaffold main body frame is provided with an expansion / contraction portion that allows a vertical separation distance between the support portion and the stage holder portion to be freely changed.   The suspension scaffold for bridges according to any one of claims 1 to 6, wherein a bridge side outrigger that is in contact with and supported by the bridge side surfaces is provided on the suspension scaffold body frame.   The suspension scaffold for bridges according to any one of claims 1 to 7, wherein the suspension scaffold main body frame is provided with a hinge portion that allows a middle portion in the longitudinal direction to be freely folded.   When the pair of the suspended scaffold main body frames are disposed on the left and right sides of the bridge at the center side end in the width direction of the bridge in the scaffold stage member, the scaffold stage members assembled to the respective stage holder portions The suspension scaffold for bridges according to any one of claims 2 to 8, wherein a scaffold stage member connecting portion that can be connected to each other is provided.   When a pair of the suspended scaffold body frames are arranged on the left and right sides of the bridge at the upper end of the suspended scaffold body frame, the pair of suspended scaffold body frames can be connected and integrated via a connecting member. The suspension scaffold for bridges according to claim 3, wherein one main body frame connecting portion is provided. A pair of suspension scaffolds for bridges according to claim 1 is prepared,
The suspension scaffold body frame of one of the pair of bridge suspension scaffolds is suspended in a posture along the vertical direction, and is arranged outside the bridge across the balustrade on one side of the bridge. The support leg member is grounded to the road surface of the bridge,
While suspending the suspension scaffold main body frame of the other bridge suspension scaffold in a posture along the vertical direction, it is arranged outside the bridge across the railing on the other side of the bridge, and the support leg member Make contact with the road surface of the bridge,
A method for installing a suspension scaffold for a bridge, in which the scaffold stage member is connected and held between stage holder portions of the suspension scaffold for each bridge.

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