JP2019148097A - Suspension type folding scaffold - Google Patents

Abstract

To provide a suspension type folding scaffold that improves work efficiency by being made foldable while ensuring safety, that greatly shortens installation work time, and can be compacted for transportation.SOLUTION: A suspension type folding scaffold 1 comprises: a work platform 2; an elevation part 3 extending upward from the work platform 2 and connected to the work platform 2 by a pin joint; a crossover part 4 connected to the elevation part 3 by a pin joint; and a support part 5 connected to the distal end side of the crossover part 4 and integrally supporting the work platform 2, the elevation part 3, and the crossover part 4. The elevation part 3 comprises a plurality of elevation part frames divided in the vertical direction. A connection part 9 between one elevation part frame 7 and the other elevation part frame 8 is connected by a pin joint. The elevation part 3 rotates with respect to the work platform 2 and the crossover part 4, while the one elevation part frame 7 and the other elevation part frame 8 are configured to be foldable by bending at the connection part 9.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a suspended folding scaffold suitable for maintenance work such as inspection, repair, reinforcement, etc. under a bridge under a girder.

  Conventionally, when performing maintenance work such as inspection, repair, reinforcement, etc. under bridge girders, etc., a chain is fixed to the ground cover of the bridge, a protective fence or a railing column, and a steel pipe is suspended from this chain. A suspended scaffold with a scaffolding plate as a working scaffold in between is used.

  Various suspension scaffolds for the purpose of shortening the installation work time and ensuring safety have been disclosed (see, for example, Patent Document 1 and Patent Document 2). In the suspended scaffold described in Patent Document 1, the frame material having a substantially U-shaped side is inserted from the lower end of the rail of the elevated bridge or the like, and the upper end of the rail is pressed to the outer surface of the rail. The upper part of the upper frame is connected to the top side of the upper horizontal frame. And a lower horizontal frame that protrudes horizontally in the direction of viaduct or the like from the lower part of the hanging frame, and the upper horizontal frame is a hanger type of thicker strength member than the hanging frame. The suspension frame is suspended below the suspension frame, a reinforcement frame that constitutes the truss frame is erected from the corner of the upper horizontal frame and the suspension frame to form a suspension reinforcement portion, and from the middle of the suspension frame The wall support beam is projected with its tip facing the railing outer surface. The frame material having a substantially U-shaped side surface is juxtaposed at a predetermined pitch along the continuous direction of the outer vertical side wall of the rail by sandwiching the upper end of the rail with the clamping part, and is integrally connected with a horizontal material, A scaffold plate is spanned on the lower horizontal frame, and a support reaction force from the outer surface of the rail is obtained by a wall-supporting beam material corresponding to the clamping performed by the clamping unit.

  According to the suspension scaffold described in Patent Document 1, it is possible to easily and quickly install and remove by inserting the upper end of a railing such as a viaduct from the lower side and detachably sandwiching the upper end of the railing. It is described that a suspension scaffold capable of supporting a load in a stable state by sufficiently calculating the strength of a portion to which a force is applied can be provided.

  Further, the suspension scaffold for a bridge described in Patent Document 2 is provided with a scaffold stage member that crosses the bridge 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 stage holder portion capable of connecting and holding the scaffold stage member at a lower portion thereof, wherein the stage holder portion has one end portion of the scaffold stage member toward and away from the center in the width direction of the bridge. The scaffold stage member is freely assembled, and the support portion is configured to attach the support leg member to the road surface of the bridge in a state where the suspension scaffold body frame is disposed on a laterally outer side of the bridge. It extends from the upper part of the suspension scaffold body frame toward the center in the width direction of the bridge, and the entire center of gravity is positioned between the grounding portion of the support leg member and the suspension scaffold body frame. Formation Is characterized in that are.

  According to the suspension scaffold described in Patent Document 2, it is possible to shorten the installation work time of the suspension scaffold, ensure safety and labor saving, and provide a suspension scaffold that does not hinder the passage of ordinary vehicles after installation. It can be done.

Japanese Patent No. 4574705 JP 2017-115569 A

  However, according to the conventional suspension scaffolds using chains and steel pipes, when installing this suspension scaffold, it may be necessary to additionally install a dedicated scaffold for construction to fix the chain to the ground cover or protective fence. is there. In addition, the work of suspending the steel pipe from the chain or the work of removing it from the chain is very dangerous, and the installation work takes time because there are many installation work processes for the suspension scaffold itself.

  According to the suspension scaffold described in Patent Document 1, it is considered that the installation work time can be shortened as compared with a conventional suspension scaffold using a chain and a steel pipe.

  However, since the suspension scaffold described in the above-mentioned Patent Document 1 is a type that sandwiches the upper end of the handrail, it is considered that the suspension scaffold cannot be installed on a bridge that does not have a sandwiched portion such as a handrail or a protective fence.

  On the other hand, according to the suspension scaffold described in Patent Document 2, it can be installed without a clamped part such as a handrail or a protective fence, and can shorten the installation work time and ensure safety. I think.

  However, especially in the inspection and repair of bridges with a narrow effective width installed in mountainous areas, etc., while ensuring safety, further shortening of installation work time by improving work efficiency is required, There is also a demand for compactness during transportation.

  In view of the above problems, the inventor of the present application improves the working efficiency by ensuring a foldable structure while ensuring safety, greatly shortens the installation work time, and is compact during transportation. As a result of intensive investigations to provide a suspended folding scaffolding that has been realized, the present invention has been achieved.

  That is, the suspended folding scaffold according to the present invention is connected to the work scaffold, the lifting part extending upward from the work scaffold, and connected to the work scaffold by pin joining, and connected to the lifting part by pin joining. And a support portion that is connected to a front end side of the crossover portion and that integrally supports the work scaffold, the elevating portion, and the crossover portion, and the elevating portion is divided in the vertical direction. It is composed of a plurality of elevating part frames, and a connecting part between one elevating part frame and the other elevating part frame is connected by pin joining, and the elevating part is connected to the working scaffold and the transition part. While being rotated, the one lifting part frame and the other lifting part frame are configured to be foldable by bending at a connecting part.

  In the suspended folding scaffold according to the present invention, the support portion includes a counterweight, and the counterweight has a hump structure.

  Furthermore, in the suspended folding scaffold according to the present invention, a plurality of ladder members are disposed along the vertical direction of the plurality of lifting unit frames, and the plurality of ladder members are connected to the plurality of lifting unit frames by pin joining. It is connected.

  Moreover, the suspended folding scaffold according to the present invention is characterized in that the elevating part includes a plurality of fence members.

  According to the suspended folding scaffold according to the present invention, the work scaffold, the lifting part, and the crossing part are pin-joined, and a plurality of lift part frames constituting the lift part are also pin-joined. And while the raising / lowering part rotates with respect to a crossing part, the whole raising / lowering folding scaffold of this invention can be comprised by bend | folding by bending a raising / lowering part by a connection part. Therefore, since the lifting part is automatically deployed by the weight of the work scaffold by lifting the crossing part, the work efficiency in the installation work can be greatly improved, and the installation work time can be greatly shortened.

  In addition, since the elevating part is configured to be foldable, it can be made compact during transportation, and can be transported by a relatively small truck.

  Further, in the suspended folding scaffold according to the present invention, the support portion includes a counterweight, and the counterweight has a hump structure (flat plate shape), so that after the suspended folding scaffold according to the present invention is installed, the effective width is wide. Even a narrow bridge can be inspected and repaired without hindering the passage of vehicles and traffic.

  Further, in the suspended folding scaffold according to the present invention, a plurality of ladder members are disposed along the vertical direction of the plurality of lifting unit frames, and the plurality of ladder members are connected to the plurality of lifting unit frames by pin joining. Thus, the ladder for raising and lowering the worker can be disposed in a state in which the elevating part is configured to be foldable, so that the installation work efficiency and safety of the scaffold can be improved.

  Further, in the suspended folding scaffold according to the present invention, by providing the lifting part with a plurality of fence members, the safety when the worker moves up and down the lifting part can be further improved.

It is a front view which shows the installation condition of the suspension type folding scaffold which concerns on one Embodiment of this invention. It is a left view of the raising / lowering part which concerns on the suspension type folding scaffold shown in FIG. It is a right view of the support part which concerns on the suspension type folding scaffold shown in FIG. It is a front view which shows the state which folded the suspension type folding scaffold shown in FIG. It is a front view which shows the middle stage which expand | deploys the suspension type folding scaffold shown in FIG. It is a schematic front view which shows the installation condition of the suspension type folding scaffold which concerns on other embodiment of this invention. It is a front view which shows the state which folded the suspension type folding scaffold shown in FIG.

  Hereinafter, an embodiment of a suspended folding scaffold according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic front view showing an installation state of a suspended folding scaffold 1 according to an embodiment of the present invention. As shown in the figure, a suspended folding scaffold 1 of the present embodiment is a suspended folding scaffold suitable for maintenance work such as inspection, repair, reinforcement, etc. under the bridge A, etc. And an elevating part 3 that extends upward from the work scaffold 2 and is connected to the work scaffold 2 by pin joint, a transition part 4 that is coupled to the lift part 3 by pin joint, and a distal end side of the transition part 4 And a support portion 5 that integrally supports the work scaffold 2, the lifting / lowering portion 3, and the crossover portion 4.

  The work scaffold 2 has a truss structure as shown in FIG. 1, but is not limited to this structure, and may have a slab structure. Moreover, it is preferable that a handrail be installed on the upper surface side periphery of the work scaffold 2 during assembly work described later. By installing the handrail, safety during work such as inspection on the work scaffold 2 is ensured.

  The front end 2a side of the work scaffold 2 is in a state of projecting below the bridge A, and the elevating part 3 is connected to the rear end 2b side by pin joining as shown in FIGS. When the suspended folding scaffolding 1 according to the present embodiment is assembled, the elevating unit 3 is extended upward from the work scaffold 2. In the present embodiment, the lower end 3a side of the elevating unit 3 and the rear end 2b side of the work scaffold 2 are connected by pin joining using pins P1 and P2.

  And the raising / lowering part 3 which concerns on this embodiment is comprised by the several raising / lowering part frame 6, 6, ... divided | segmented to the up-down direction. The number of divisions of the lifting unit 3, that is, the number of configurations of the lifting unit frame 6 constituting the lifting unit 3 is not particularly limited, but the configuration number of the lifting unit frame 6 is 2 to 3. Is not particularly complicated, and is particularly preferable from the viewpoint of the strength of the elevating unit 3 and workability during assembly. In the present embodiment, the elevating part 3 is constituted by two divisions of an upper elevating part frame 7 and a lower elevating part frame 8.

  In addition, a connecting portion 9 between the upper elevating part frame body 7 (= one elevating part frame body 6) and the lower elevating part frame body 8 (= the other elevating part frame body 6) is connected by pin joining. ing. Specifically, the connecting portion 9 between the lower end 7a side of the elevating part frame body 7 and the upper end 8a side of the elevating part frame body 8 according to the present embodiment is connected by pin joining using pins P3 and P4.

  Further, the plurality of lifting part frame bodies 6 (in this embodiment, the upper lifting part frame body 7 and the lower lifting part frame body 8 in this embodiment) that constitute the lifting part 3 according to the present embodiment are arranged along the vertical direction thereof. A plurality of ladder members 10 are arranged. The plurality of ladder members 10 are connected to the lifting part frame bodies 7 and 8 according to the present embodiment constituting the lifting part 3 by pin joining with pins P5 and P6.

  Moreover, the crossover part 4 is connected above the said raising / lowering part 3 by pin joining. In the present embodiment, the front end 4a side of the crossover portion 4 is in a state of overhanging the beam of the bridge A, and the upper end 3b side of the elevating / lowering portion 3 is connected to the rear end 4b side by pin joining with pins P7 and P8. As shown in FIG. 1, the crossover portion 4 also has a truss structure like the work scaffold 2 according to the present embodiment, but is not limited to this structure, and may have a slab structure. Moreover, it is preferable that a handrail is also installed on the upper surface side periphery of the crossover portion 4 at the time of assembly work described later.

  And the support part 5 is connected with the front-end | tip 4a side of said transition part 4 which concerns on this embodiment. As shown in FIG. 3, the support portion 5 mainly includes a support portion frame 11 and a counterweight 12 to which the support portion frame 11 is connected.

  In this embodiment, the front end 4a side of the crossover portion 4 is connected to the upper end 11a side of the support portion frame 11 related to the support portion 5 by pin joining using pins P9 and P10. A counterweight 12 is connected to the lower end 11 b side of the support portion frame 11. That is, the work scaffold 2, the lifting / lowering section 3, and the crossover section 4 according to the suspended folding scaffold 1 of the present embodiment are provided by the support section 5 including the support section frame 11 and the counterweight 12 installed on the bridge A. Will be supported integrally.

  In addition, the height of the support part frame 11 which comprises the support part 5 which concerns on this embodiment is not specifically limited, It selects suitably according to the height of the guard fence B with which the bridge A is equipped, a handrail, a ground cover, etc.

  Moreover, although the support part 5 which concerns on this embodiment is provided with the counterweight 12, if the support part frame 11 which comprises the support part 5 can be directly fixed to the guard fence B, ground cover, etc. which concern on the bridge 1, it is possible. The counterweight 12 is not necessarily provided. However, since the work for fixing the support part frame 11 to the protective fence B or the ground cover related to the bridge A occurs or the strength of the protective fence B becomes a problem, the suspension type folding of the present embodiment It is preferable that a counterweight 12 capable of supporting the scaffold 1 is provided in advance.

  Further, the shape of the counterweight 12 provided in the support portion 5 according to the present embodiment is not particularly limited, and may be a three-dimensional counterweight such as a rectangular parallelepiped. However, a hump structure (flat plate shape) as shown in FIG. ) Is preferable. By setting the shape of the counterweight 12 to a hump structure (flat plate shape), when the suspended folding scaffolding 1 according to the present embodiment is installed on the bridge A, the counterweight 12 installed on the bridge A is used for traffic and passers-by of vehicles. Therefore, even if the effective width of the bridge A is narrow, the bridge can be inspected and repaired without restricting traffic such as blocking the vehicle or passing on one side.

  In the suspended folding scaffolding 1 according to the present embodiment having the above-described configuration, the work scaffold 2, the elevating part 3, and the crossing part 4 are connected by pin joining. Further, the elevating unit 3 is divided into an upper elevating unit frame 7 and a lower elevating unit frame 8, and the upper elevating unit frame 7 (= one elevating unit frame 6). And a plurality of ladder members 10 disposed on the lifting part frame bodies 7 and 8 are also connected by pin joining. Yes. Therefore, as shown in FIG. 4, the hanging type folding scaffold 1 of the present embodiment is configured such that the lifting unit 3 rotates with respect to the work platform 2 and the crossing unit 4, and the upper lifting unit frame 7 and the lower unit frame 7. The lifting type folding scaffold 1 can be configured to be foldable by bending the lifting part 3 at the connecting part 9 with the lifting part frame 8.

  Further, when installing the suspended folding scaffold 1 of the present embodiment on the bridge A, the lifting part is lifted by the weight of the work scaffold 2 as shown in FIG. Since 3 automatically expands, the work efficiency in the installation work can be greatly improved, and the installation work time can be greatly shortened. In addition, when installing a handrail in the upper surface side periphery of the transition part 4, it is preferable to install a handrail in the step before lifting the transition part 4. FIG.

  As described above, the work scaffold 2 is disposed at a predetermined position under the bridge A in a state where the crossing portion 4 is lifted and the elevating portion 3 is fully deployed, and is connected to the support portion 5 disposed on the bridge A. By doing so, the work scaffold 2, the elevating part 3, and the crossing part 4 are integrally supported by the support part 5, and the installation of the suspended folding scaffold 1 of this embodiment is completed.

  On the other hand, when removing the suspended folding scaffolding 1, the crossover part 4 is removed from the support part 5 and lifted, and the work scaffolding 2 is placed on a truck bed or the like for transporting the suspended folding scaffolding 1. Then, when the transfer part 4 is lowered as it is, the elevating part 3 is rotated with respect to the work scaffold 2 and the transfer part 4, and the elevating part 3 is bent at the connecting part 9, and the state shown in FIG. It can be folded into the state shown in FIG. As described above, the elevating unit 3 according to the suspended folding scaffold 1 of the present embodiment is configured to be foldable, so that it is possible to reduce the size at the time of transport, and transport on a relatively small truck is also possible. Therefore, even when the road to the work site is narrow like a bridge in a mountainous area or the like, the suspended folding scaffolding 1 of the present embodiment can be transported and installed.

  As mentioned above, although one embodiment of the suspension type folding scaffold of this invention was explained in full detail, the suspension type folding scaffold of this invention is not limited to said embodiment. For example, in the suspended folding scaffolding 1 according to the above-described embodiment, a plurality of ladder members 10 are provided along the vertical direction of the plurality of lifting unit frames 6 (the lifting unit frames 7 and 8) constituting the lifting unit 3. Since the plurality of ladder members 10 are connected by pin joining with the pins P5 and P6, the raising and lowering ladder for the worker can be arranged in a state where the raising and lowering unit 3 is foldable. The installation work efficiency of the suspension type folding scaffold 1 can be improved, and the safety of the worker when raising and lowering can be improved.

  However, a plurality of ladder members 10 do not necessarily have to be disposed on the plurality of lift unit frames 6 constituting the lift unit 3, and after the suspended folding scaffolding of the present invention is installed on the pier A, the ladder is placed in the lift unit. By separately installing, the worker can move up and down the lifting unit, the configuration of the suspended folding scaffold of the present invention can be further simplified, and the weight of the suspended folding scaffold can be reduced.

  In addition, as shown in FIG. 1, after the suspended folding scaffolding 1 of the present embodiment is deployed or after the suspended folding scaffolding 1 is installed on the bridge A, the connecting part between the work scaffold 2 and the lifting part 3, the lifting part In the connecting portion between the connecting portion 3 and the crossover portion 4, it is more preferable that pins are joined by pins P <b> 11, P <b> 12, P <b> 13, P <b> 14 in order to further strengthen the connecting state in each connecting portion and further improve the safety.

  Furthermore, in the suspended folding scaffold according to the present invention, it is particularly preferable that the elevating unit is provided with a plurality of fence members because safety can be further improved when an operator moves up and down the elevating unit. Specifically, in the suspended folding scaffolding 1 of the present embodiment shown in FIGS. 1 and 2, a plurality of fence members 13 are arranged along the vertical direction of the elevating unit 3. The fence member 13 is pin-bonded to the elevating part frame 7 and the elevating part frame 8 that constitute the elevating part 3. The fence member 13 may be installed after the lifting / lowering unit 3 according to the suspended folding scaffolding 1 is deployed. However, installation of the lifting / lowering unit 3 as shown in FIG. More preferable from the viewpoint.

  Moreover, other embodiment of the suspension type folding scaffold of this invention is shown in FIG.6 and FIG.7. The suspended folding scaffolding 1a according to the present embodiment shown in these drawings has the same basic configuration as the suspended folding scaffolding according to the above-described embodiment, and includes a work scaffold 2, an elevating unit 3, and a crossover. It comprises the part 4 and the support part 5, and each is connected by pin joining.

  Moreover, the raising / lowering part 3 is comprised by the two division | segmentation of the upper raising / lowering part frame 7 (= one raising / lowering part frame 6) and the lower raising / lowering part frame 8 (= other raising / lowering part frame 6). At the same time, the connecting portion 9 between the upper elevating part frame body 7 and the lower elevating part frame body 8 and the plurality of ladder members 10 disposed on the elevating part frame bodies 7 and 8 are also connected by pin joining. ing.

  Here, in the suspended folding scaffolding 1a of the present embodiment, the vicinity of the middle part 3c of the lifting unit 3 (in this embodiment, the lower lifting unit 7a side of the upper lifting unit frame 7 (= one lifting unit frame 6)). And the rear end 4b side of the crossover part 4 is connected by pin joining by the pins P15 and P16.

  According to the suspended folding scaffolding 1a of the present embodiment having the above-described configuration, when the lifting part 3 is lifted by lifting the moving part 4 related to the hanging folding scaffold 1a, as shown in FIG. The raising / lowering distance h2 between the work scaffolds 2 can be shortened compared with the raising / lowering distance h1 of the suspension type folding scaffold 1 which concerns on said embodiment. In other words, by adjusting the connecting portion between the elevating unit 3 and the crossover unit 4, the elevating distance between the crossing unit 4 and the work scaffold 2 when the elevating unit 3 is deployed can be easily adjusted.

  As shown in FIG. 6, when the suspended folding scaffolding 1a is deployed or after the suspended folding scaffolding 1a is installed on the bridge A, the connection between the work scaffold 2 and the lifting unit 3 and the lifting unit 3 are crossed. In the connecting portion with the portion 4, it is more preferable that pins are joined by pins P11, P12, P17, and P18 in order to further strengthen the connected state in each connecting portion and further improve the safety.

  As described above, according to the suspended folding scaffold according to the present invention, the overall configuration is not changed, and the lifting distance between the crossing part and the work scaffold is easily adjusted only by adjusting the connecting portion between the lifting part and the crossing part. be able to. Therefore, by grasping in advance the lifting distance at the installation site of the suspended folding scaffolding, it is possible to adjust the connecting portion between the lifting part and the transition part in advance before transporting the suspended folding scaffold. Furthermore, at the installation site of the suspended folding scaffolding, it is possible to easily install the suspended folding scaffolding simply by lifting the crossover and deploying the lifting part, improving work efficiency and significantly increasing the installation work time. Shortening is achieved.

  As mentioned above, although the suspension type folding scaffold which concerns on embodiment of this invention was explained in full detail, it should not be understood as limiting the technical idea of this invention substantially. The present invention can be carried out without departing from the gist, with appropriate improvements, changes, or additions based on the inventive ideas and ideas of those skilled in the art.

DESCRIPTION OF SYMBOLS 1, 1a: Suspension type folding scaffold 2: Working scaffold 3: Lifting part 4: Crossing part 5: Support part 6, 7, 8: Lifting part frame body 9: Connection part 10: Ladder member 11: Support part frame 12: Counter Weight A: Bridge B: Guard fence

Claims (4)

Working scaffold,
An elevating part extending upward from the work scaffold and connected to the work scaffold by pin joining;
A crossover connected to the elevating part by pin bonding;
A support part connected to the distal end side of the crossover part and integrally supporting the work scaffold, the elevating part and the crossover part;
Comprising
The elevating part is composed of a plurality of elevating part frame bodies divided in the vertical direction,
The connecting part of one said raising / lowering part frame and the said other raising / lowering part frame is connected by pin joining,
While the said raising / lowering part rotates with respect to the said work scaffold and the said crossing part, it is comprised so that it can fold by bending one said raising / lowering part frame and said other raising / lowering part frame in a connection part. Suspended folding scaffold characterized by that. The support portion includes a counterweight;
The suspended folding scaffold according to claim 1, wherein the counterweight has a hump structure. A plurality of ladder members are disposed along the up-down direction of the plurality of lifting unit frames,
The suspended folding scaffold according to claim 1 or 2, wherein the plurality of ladder members are connected to the plurality of lifting part frame bodies by pin joining.   The suspension type folding scaffold according to any one of claims 1 to 3, wherein the elevating part includes a plurality of fence members.