Suspended scaffolding

Abstract

For example, when installed and applied to structures where the height differs depending on the position of components such as bridge girders in arched bridges, it provides a suspended scaffold with excellent workability. [Solution] The scaffolding 10 is a suspended scaffolding that is suspended from a structure above, with scaffolding boards 4b provided on the upper surfaces of at least one pair of beam members 4a, 4a. The ends of the first suspended scaffolding 4 (4A~4I) are connected to a first position on an intermediate member (dedicated support column 450) that extends in the vertical direction, and the ends of the second suspended scaffolding 4 are connected to a second position on the intermediate member opposite to the side to which the first suspended scaffolding 4 is connected. The first position and the second position are set at different heights.

Description

Technical Field

[0001] The present invention relates to a scaffold that is suitably installed at a work site for operations such as the construction of new structures, repairs, and replacement of floor slabs, such as bridges.

Background Art

[0002] Conventionally, as one of the scaffolds suitably installed at a work site for operations such as the construction of new structures, repairs, and replacement of floor slabs, such as bridges, there is a suspended scaffold.

[0003] Such a conventional suspended scaffold is configured by connecting a plurality of suspended scaffolds in the horizontal direction (see Patent Document 1, etc.).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, when such a conventional suspended scaffold is installed and applied to a structure with different heights depending on the position of components such as bridge girders of an arch-shaped bridge, etc., there are many places where the distance from the bridge girder, etc. is large and the work cannot be carried out well, and there is a problem that the workability is not excellent.

[0006] Therefore, the present invention has been made in view of such circumstances, and the object thereof is to provide a suspended scaffold with excellent workability when installed and applied to a structure with different heights depending on the position of components such as bridge girders of an arch-shaped bridge, etc.

Means for Solving the Problems

[0007] To achieve the above objective, the invention described in claim 1 is a suspended scaffold, wherein scaffolding boards are provided on the upper surfaces of at least one pair of beam members, and the scaffold is suspended from a structure provided above, The end of the first suspended scaffold is connected to a first position of an intermediate member extending in the vertical direction, and the end of the second suspended scaffold is connected to a second position of the intermediate member on the side opposite to the side to which the first suspended scaffold is connected, and the first position and the second position are set at different heights.

[0008] The invention described in claim 2 is characterized in that, in the invention described in claim 1, a gap-filling member is attached to the intermediate member to close the gap between the first suspended scaffold and the second suspended scaffold.

[0009] The invention described in claim 3 is characterized in that, in the invention described in claim 1, the intermediate member is at least one pair of dedicated support columns extending in the vertical direction, and the pair of dedicated support columns are provided with fixing members at the first position and the second position, respectively, for connecting and fixing the ends of the first suspended scaffolding and the second suspended scaffolding.

[0010] The invention described in claim 4 is characterized in that, in the invention described in claim 1, the beam material comprises a beam material body portion and an attachment member provided at the end of the beam material body portion for connecting and attaching to the intermediate member, wherein the attachment member has a fixing portion for connecting and fixing to the intermediate member and a rotating portion that allows the beam material body portion to rotate horizontally while the fixing portion is connected to and fixed to the intermediate member.

[0011] The invention described in claim 5 is characterized in that, in the invention described in claim 4, the mounting member comprises a lower mounting member provided on the lower side of one end of the beam material body and an upper mounting member provided on the upper side of one end of the beam material body, wherein the fixing portion provided on the lower mounting member is a downward projection that is inserted into an insertion hole provided on the intermediate member, and the fixing portion provided on the upper mounting member is a mounting fixing portion that is attached and fixed to a mounting fixing portion provided on the intermediate member.

[0012] The invention described in claim 6 is characterized in that, in the invention described in claim 1, one end of a brace material is rotatably engaged horizontally with one end of one of the pair of beam materials, and the other end of the brace material is engaged with the intermediate member to which the other end of the other beam material is joined.

[0013] The invention described in claim 7 is characterized in that, in the invention described in claim 3, a suspension means fixing portion for suspending a suspension means for suspending the structure is provided at the upper end of the dedicated support column.

[0014] The invention described in claim 8 is characterized in that, in the invention described in claim 7, the suspension means fixing part is detachably attached to the upper end of the dedicated support column, and a connecting member for connecting a support column extension member, a handrail member, or a member including a morning glory is also detachably attached.

[0015] The invention described in claim 9 is characterized in that, in the invention described in claim 3, a reinforcing beam is connected and provided between a pair of dedicated support columns, each connected to one end of the pair of beam materials. [Effects of the Invention]

[0016] According to the invention described in claim 1, the first suspended scaffolding and the second suspended scaffolding can be formed in a stepped manner with different heights. Therefore, when installed and applied to structures where the height differs depending on the position of components such as bridge girders of an arched bridge, for example, excellent workability can be achieved.

[0017] According to the invention described in claim 2, the gap-filling member makes it difficult for tools and other objects to fall downward from the suspended scaffolding.

[0018] According to the invention described in claim 3, the intermediate member can be a dedicated support column with a simple structure, and the first suspended scaffold and the second suspended scaffold can be formed in a stepped manner with different heights.

[0019] According to the invention described in claim 4, the beam members forming the suspended scaffolding are attached to the intermediate member by mounting members in which the fixed part and the rotating part are located at different positions. Therefore, the force applied downward is distributed without being concentrated, and thus the scaffolding can be made durable enough to be used repeatedly over a long period of time.

[0020] According to the invention described in claim 5, the beam material can be easily connected to the intermediate member by simply inserting the downward projection of the lower fixing portion of the lower mounting member into the insertion hole provided in the intermediate member, and then attaching and fixing the mounting fixing portion of the upper fixing portion of the upper mounting member to the mounting fixing portion provided in the intermediate member, resulting in good workability.

[0021] According to the invention described in claim 6, the bracing material allows for easy installation of the beam material, resulting in good workability, and the bracing material also makes it easy to increase the horizontal structural strength.

[0022] According to the invention described in claim 7, the suspended scaffolding can be easily suspended by the suspension means using the suspension means fixing part at the upper end of the dedicated support column.

[0023] According to the invention described in claim 8, the dedicated support columns for the parts that do not need to be suspended by the suspension means can be used by connecting support column extension members, handrail members, or members such as morning glories.

[0024] According to the invention described in claim 9, the structural strength of the entire suspension scaffold can be more easily increased by the reinforcing beam material.

Brief Description of the Drawings

[0026] Hereinafter, each embodiment of the present invention will be described in detail with reference to the drawings. [First Embodiment] First, a first embodiment of the present invention will be described based on Figures 1 to 21.

[0027] Figure 1 is a front view showing the scaffolding of the first embodiment of the present invention installed on a bridge. Figure 2 is an explanatory diagram for explaining the combination of scaffolding in Figure 1. Figure 3 is a partially enlarged perspective view showing the connection portion of the scaffolding in Figure 1 from an oblique upper side. Figure 4 is a partially enlarged front view showing the connection portion of the scaffolding in Figure 1 from the front side.

[0028] As shown in Figures 1 to 4, the scaffolding 1 of this embodiment is configured such that four suspended scaffolding 4A to 4D are connected below the bridge girder 2b of the bridge 2 between vertical scaffolding 3, 3 which are erected on the side of the bridge pier 2a of the bridge 2.

[0029] The vertical scaffolding 3 is the connected structure to which the suspended scaffolding 4A is connected. As shown in Figure 2, it is formed using vertical pipe members 3a, horizontal pipe members 3b, and diagonal pipe members 3c, which are vertical structural members, to create a rectangular cylindrical side section. Multiple scaffolding boards 3d for the vertical scaffolding are supported at predetermined height positions inside this section.

[0030] As shown in Figure 2, the suspended scaffolding 4 (4A~4D) is configured with a scaffolding board 4b for the suspended scaffolding installed above a pair of beam members 4a, 4a, and suspended from the bridge girder 2b of the bridge 2 by a chain 5 as a suspension means.

[0031] Furthermore, as shown in Figure 1, the vertical scaffolding 3 and the suspended scaffolding 4 (4A-4D) are connected such that the upper surface of the scaffolding board 3d for the uppermost vertical scaffolding of the vertical scaffolding 3 and the upper surface of the scaffolding board 4b for the suspended scaffolding of the suspended scaffolding 4 (4A-4D) are approximately flush.

[0032] In Figures 2 and 3, the upper surface of the second vertical scaffolding board 3d from the top of the vertical scaffolding 3 and the upper surface of the suspended scaffolding board 4b of the suspended scaffolding 4 are connected so that they are approximately flush.

[0033] As shown in Figures 5 and 6, the vertical pipe material 3a forming the side of the vertical scaffolding 3 is provided with an upper flange portion 31 and a lower flange portion 32 for connecting the ends of the beam material 4a of the suspended scaffolding 4, and an engaging member 33 for engaging the ends of the brace material 47 of the suspended scaffolding 4.

[0034] As shown in Figure 7(a), the upper flange portion 31 has a shape with bulging pieces 31a in a cross shape and is provided substantially horizontally on the vertical pipe material 3a, and each bulging piece 31a is provided with an insertion hole 31b.

[0035] As shown in Figure 7(b), the lower flange portion 32 is located below the upper flange portion 31 and has a shape with bulging pieces 32a in a cross shape. It is provided substantially horizontally on the vertical pipe material 3a, and each bulging piece 32a is provided with an insertion hole 32b.

[0036] As shown in Figure 5, the engaging member 33 is provided between the upper flange portion 31 and the lower flange portion 32, and has a fixing portion 33a for the vertical pipe material 3a and a protruding portion 33b, the protruding portion 33b of which is provided with an engaging hole 33c, and also has a wedge member 33d for fixing the engaging member 33 to the vertical pipe material 3a.

[0037] On the other hand, the pair of beam members 4a that form the suspended scaffolding 4 have a common configuration and, as shown in Figure 8, are mainly composed of an upper horizontal frame member 41, a lower horizontal frame member 42, and a truss member 44 that connects and reinforces the space between the upper horizontal frame member 41 and the lower horizontal frame member 42.

[0038] Upper mounting members 41a, which constitute mounting members, are provided at both the left and right ends of the upper horizontal frame member 41 that makes up the beam member 4a.

[0039] The upper mounting member 41a has an upper mounting piece 411 which is a rotating part, a lower mounting piece 412, and a connecting insertion part 413 which has an insertion slit 413b which is an upper fixing part.

[0040] The upper mounting piece 411 contacts the upper surface of the end of the upper horizontal frame material 41.

[0041] The lower mounting piece 412 contacts the lower surface of the end of the upper horizontal frame material 41.

[0042] As shown in Figures 5, 6, and 9, the connecting insertion part 413 has an insertion slit 413b into which the bulging piece 31a of the upper flange portion 31 provided on the vertical pipe material 3a that forms the side of the vertical scaffolding 3 is inserted, and the wedge member 31c can be inserted into the insertion hole 413a of the connecting insertion part 413 and the insertion hole 31b of the upper flange portion 31.

[0043] As a result, when the bulging piece 31a of the upper flange portion 31 provided on the vertical pipe material 3a that forms the side of the vertical scaffolding 3 is inserted into the connecting insertion portion 413, and the wedge member 31c is inserted into the communicating insertion holes 413a and 31b, the end of the upper horizontal frame material 41 of the beam material 4a is connected to the vertical pipe material 3a.

[0044] Furthermore, the upper mounting piece 411 and the lower mounting piece 412 of the upper mounting member 41a have rotatable mounting holes 411a and 412a.

[0045] Furthermore, the upper mounting piece 411 and lower mounting piece 412 of the upper mounting member 41a are provided with pin insertion holes 411b and 412b adjacent to the rotatable mounting holes 411a and 412a, and a pin insertion hole 414b communicating with these pin insertion holes 411b and 412b is provided at the end of the upper horizontal frame member 41 between the upper mounting piece 411 and the lower mounting piece 412. A pin 415 is then inserted into these communicating pin insertion holes 411b, 412b, and 414b with its head facing upwards.

[0046] Lower mounting members 42a, which constitute mounting members, are provided at both the left and right ends of the lower horizontal frame member 42 that makes up the beam member 4a.

[0047] This lower mounting member 42a has an upper mounting piece 421, a lower mounting piece 422, and a downward-facing projection 423 which is a lower fixing part.

[0048] The upper mounting piece 421 contacts the upper surface of the end of the lower horizontal frame material 42.

[0049] The lower mounting piece 422 contacts the lower surface of the end of the lower horizontal frame material 42.

[0050] The downward-facing projection 423 protrudes downward so that it can be inserted into the insertion hole 32b of the lower flange portion 32 provided on the vertical pipe material 3a that forms the side of the vertical scaffolding 3.

[0051] Furthermore, the upper mounting piece 421 and lower mounting piece 422 of the lower mounting member 42a have rotatable mounting holes 421a and 422a.

[0052] Furthermore, the lower mounting piece 412 of the upper mounting member 41a and the upper mounting piece 421 of the lower mounting member 42a are connected vertically by the end vertical frame member 43.

[0053] Furthermore, the ends of the end vertical frame material 43, which has a hollow portion, are inserted and connected to the rotatable mounting hole 412a of the lower mounting piece 412 of the upper mounting member 41a and the rotatable mounting hole 421a of the upper mounting piece 421 of the lower mounting member 42a, respectively, thereby forming a mounting member having the upper mounting member 41a and the lower mounting member 42a.

[0054] Furthermore, the bolt 416 is inserted from the pivot mounting hole 411a side of the upper mounting piece 411 of the upper mounting member 41a to the pivot mounting hole 422a of the lower mounting piece 422 of the lower mounting member 42a, passing through the insertion holes 41b, 42b at the ends of the upper horizontal frame member 41 and the lower horizontal frame member 42, and through the end vertical frame member 43, and its lower end is screwed in and secured with a nut 417.

[0055] As a result, when the mounting member having an upper mounting member 41a and a lower mounting member 42a is connected to the vertical pipe material 3a that forms the side of the vertical scaffolding 3, the beam material body 40 of the beam material 4a is rotatable horizontally around the bolt 416 relative to the upper mounting member 41a and the lower mounting member 42a.

[0056] Here, as shown in Figures 9 and 10, the rotatable mounting hole 411a of the upper mounting piece 411 of the upper mounting member 41a and the rotatable mounting hole 422a of the lower mounting piece 422 of the lower mounting member 42a, through which the bolt 416 is inserted, have approximately the same diameter.

[0057] Furthermore, the central axis O1 of the rotatable mounting hole 411a of the upper mounting piece 411 of the upper mounting member 41a is located closer to the vertical pipe material 3a, and the central axis O2 of the rotatable mounting hole 422a of the lower mounting piece 422 of the lower mounting member 42a is located closer to the beam material 4a, with a horizontal offset between them.

[0058] As a result, when the beam material 4a is connected to the vertical pipe material 3a, a gap c1 is created between the bolt 416 and the pivot mounting hole 411a on the upper mounting piece 411 side of the upper mounting member 41a, and a gap c2 is created between the bolt 416 and the beam material 4a side of the pivot mounting hole 422a on the lower mounting piece 422 side of the lower mounting member 42a, and between the bolt 416 and the beam material 4a.

[0059] Furthermore, as shown in Figure 9, in the lower mounting member 42a, the lower mounting piece 422 is formed to be longer than the upper mounting piece 421, so that the lower mounting piece 422 contacts the lower horizontal frame material 42 over a longer area than the upper mounting piece 421.

[0060] Furthermore, as shown in Figure 11, a dedicated support column 45, which is a connected body extending vertically, is connected to the other end of each of the pair of beam members 4a, 4a, opposite to one end.

[0061] As shown in Figures 11 and 12, this dedicated support column 45 mainly consists of a support column body 45a, an upper flange portion 45b provided around the upper side of the support column body 45a, a lower flange portion 45c provided around the lower side of the support column body 45a, a flange portion 45d for engaging brace material provided around the space between the upper flange portion 45b and the lower flange portion 45c of the support column body 45a, and a suspension means fixing portion 455 capable of locking the lower end of the chain 5 used as a suspension means.

[0062] The main support column section 45a is shaped like a cylinder that extends vertically.

[0063] The upper flange portion 45b has a shape with bulging pieces 451 in a cross shape, is mounted substantially horizontally on the main support portion 45a, and each bulging piece 451 is provided with an insertion hole 451a.

[0064] The lower flange portion 45c has a shape with bulging pieces 452 in a cross shape, is mounted substantially horizontally on the main support portion 45a, and each bulging piece 452 is provided with an insertion hole 452a.

[0065] The flange portion 45d for engaging the brace material has a shape that includes a notch 453a for fitting into the main body portion 45a of the support column, and is provided substantially horizontally on the main body portion 45a of the support column, with engaging holes 453b provided at substantially equal intervals so as to surround the main body portion 45a of the support column.

[0066] As shown in Figures 9 and 11, the bulging piece 451 on the side of the upper flange portion 45b to which the beam material 4a is connected is inserted into the insertion slit 413b of the connecting insertion portion 413 of the upper mounting member 41a of the beam material 4a. The insertion hole 413a provided in this connecting insertion portion 413 and the insertion hole 454 of the upper flange portion 45b are in communication, and the wedge member 31c is inserted into these insertion holes 413a and 454.

[0067] Furthermore, the downward-facing projection 423 of the lower mounting member 42a of the beam material 4a is inserted into the insertion hole 452a of the bulging piece 452 on the side of the lower flange portion 45c to which the beam material 4a is connected.

[0068] On the other hand, as shown in Figures 6 and 21, one end of a brace member 47 is rotatably engaged horizontally with a dedicated support column 45 connected to one end of one of the pair of beam members 4a, 4a, and the other end of this brace member 47 is engaged with an engaging member 33 of a vertical pipe member 3a to which the other end of the other beam member 4a is joined.

[0069] Furthermore, of the pair of beam members 4a, 4a, the brace member 47 is not connected to the dedicated support column 45 on the other end of the other beam member 4a.

[0070] As shown in Figure 13, the brace material 47 is provided with an engaging projection 47a on one end and an engaging mounting portion 47b on the other end.

[0071] As shown in Figure 14, the engaging projection 47a rotatably engages with the engaging hole 453b of the brace material engaging flange portion 45d of the dedicated support column 45 on the other end side of the other beam material 4a.

[0072] As shown in Figure 15, the engaging mounting portion 47b has an insertion slide portion 470 into which the protruding portion 33b of the engaging member 33 provided on the vertical pipe material 3a is inserted.

[0073] Furthermore, the engaging mounting portion 47b of the brace material 47 is provided with a roughly U-shaped movable engaging portion 472, to which a spring 471 has a biasing force at its base. By pressing and releasing the base of this movable engaging portion 472 with a finger or the like, the tip portion 472a of the movable engaging portion 472 moves up and down, making it possible to switch between an engaged state and an unengaged state with the engaging hole 33c of the protruding portion 33b of the engaging member 33 inserted into the insertion slide portion 470.

[0074] Furthermore, as shown in Figure 3, multiple scaffolding boards 4b for the first suspended scaffolding are provided on the upper side of the pair of beam members 4a, 4a by fitting the mounting fitting portions 48 provided on both the left and right ends of the scaffolding boards 4b for the first suspended scaffolding onto the upper surface of the upper horizontal frame member 41 of the pair of beam members 4a, 4a.

[0075] As shown in the enlarged view of Figure 3, the mounting fitting portions 48, 48 of adjacent scaffolding boards 4b, 4b for suspended scaffolding are staggered and do not overlap.

[0076] Furthermore, as shown in Figure 16, a horizontal reinforcing beam 4a' is attached between the dedicated support columns 45, 45 at the other end of the pair of beam members 4a, 4a.

[0077] Since this horizontal reinforcing beam 4a' has the same configuration as the pair of beams 4a, 4a described above, a detailed explanation will be omitted.

[0078] Here, the downward projection 423 of the lower mounting member 42a is inserted into the insertion hole 452a of the lower flange portion 45c of the dedicated support column 45, which is perpendicular to the beam material 4a, and the upper flange portion 45b of the dedicated support column 45 is inserted into the connecting insertion portion 413 of the upper mounting member 41a, and connected with a wedge member 31c, so that the beam material 4a' for horizontal reinforcement is attached between the dedicated support columns 45, 45 at the other end of the pair of beam materials 4a, 4a.

[0079] Then, a chain 5 is provided as a suspension means between the suspension means fixing part 455 at the upper end of the dedicated support column 45 and the bridge girder 2b of the bridge 2, thereby forming the first suspended scaffolding 4A.

[0080] Furthermore, the second suspended scaffolding 4B is installed connected to the first suspended scaffolding 4A. However, the only difference between the second suspended scaffolding 4B and the first suspended scaffolding 4A is that the connection point of the pair of beam members 4a, 4a is the dedicated support column 45 of the first suspended scaffolding 4A, which is a different connected object. Therefore, a detailed explanation is omitted.

[0081] Furthermore, the third suspended scaffolding 4C is connected to the second suspended scaffolding 4B, but since the third suspended scaffolding 4C has the same configuration as the second suspended scaffolding 4B, a detailed explanation will be omitted.

[0082] Furthermore, the fourth suspended scaffolding 4D is connected to the third suspended scaffolding 4C, but since this fourth suspended scaffolding 4D has the same configuration as the first suspended scaffolding 4A, a detailed explanation will be omitted.

[0083] Next, the method for constructing the scaffolding 1 of this embodiment will be described.

[0084] First, in constructing the vertical scaffolding 3, as shown in Figure 1, vertical pipe members 3a, horizontal pipe members 3b, and diagonal pipe members 3c are erected from the ground and assembled on the side of the bridge pier 2a of the bridge 2, and then multiple levels of scaffolding boards 3d are supported at a predetermined height to complete the structure.

[0085] Next, we will explain how to construct the first suspended scaffolding, 4A.

[0086] When constructing the first suspended scaffolding 4A, the connection work is first carried out on the beam member 4a that is not engaged with the brace member 47.

[0087] In other words, as shown in Figures 6, 9, and 17-19, the downward projection 423 of the lower mounting member 42a on one end of the beam member 4a is inserted into the insertion hole 32b of the lower flange portion 32 provided in the vertical pipe member 3a that forms the side of the vertical scaffolding 3.

[0088] Furthermore, by inserting the connecting insertion portion 413 of the upper mounting member 41a on one end of the beam material 4a into the upper flange portion 31 provided on the vertical pipe material 3a and connecting them with a wedge member 31c, one end of the beam material 4a is connected to the vertical pipe material 3a that forms the side of the vertical scaffolding 3.

[0089] At this time, the beam member 4a is already folded towards the vertical scaffolding 3. The worker holds its base and rotates it 90 degrees horizontally so that the other end faces the opposing vertical scaffolding 3. This connects the pin insertion holes 411b and 412b of the upper mounting piece 411 and lower mounting piece 412 of the upper mounting member 41a with the pin insertion hole 414b at the end of the upper horizontal frame member 41. The worker then inserts the pin 415 from above into these connected pin insertion holes 411b, 414b, and 412b to fix the base of the beam member 4a.

[0090] Next, the connection work is carried out on the beam member 4a to which the brace member 47 is engaged.

[0091] That is, as shown in Figures 6, 9, 20, and 21, the downward projection 423 of the lower mounting member 42a on one end of the beam member 4a is inserted into the insertion hole 32b of the lower flange portion 32 provided in the vertical pipe member 3a that forms the side of the vertical scaffolding 3.

[0092] Furthermore, by inserting the connecting insertion portion 413 of the upper mounting member 41a on one end of the beam material 4a into the upper flange portion 31 provided on the vertical pipe material 3a that forms the side of the vertical scaffolding 3, and connecting them with a wedge member 31c, one end of the beam material 4a is connected to the vertical pipe material 3a that forms the side of the vertical scaffolding 3.

[0093] At this time, the beam member 4a and the brace member 47 are already folded towards the vertical scaffolding 3. The worker takes the other end of the brace member 47 and rotates it horizontally by 90 degrees so that the other end of the beam member 4a faces the opposing vertical scaffolding 3. Once it is parallel to the already connected beam member 4a, the worker engages the insertion recess 47b on the other end of the brace member 47 with the protrusion 33b of the engaging member 33 provided on the vertical pipe member 3a, and engages the movable engaging portion 472 of the insertion recess 47b with the engaging hole 33c of the protrusion 33b of the engaging member 33 provided on the vertical pipe member 3a to engage it, thereby connecting the brace member 47 to the vertical pipe member 3a.

[0094] Then, by fitting the mounting fitting portions 48 provided at both the left and right ends of the first suspended scaffolding board 4b onto the upper surface of the upper horizontal frame member 41 of the pair of beam members 4a, 4a, multiple first scaffolding boards 4b are provided on the upper side of the pair of beam members 4a, 4a.

[0095] Next, as shown in Figure 16, the horizontal reinforcing beam member 4a' is placed diagonally between the dedicated support columns 45, 45 at the other end of the pair of beam members 4a, 4a. The downward projection 423 of the lower mounting member 42a is inserted into the insertion hole 452a of the lower flange portion 45c of these dedicated support columns 45, and then the upper flange portion 45b of the dedicated support column 45 is inserted into the connecting insertion portion 413 of the upper mounting member 41a to attach it.

[0096] Then, a chain 5 is installed as a suspension means between the suspension means fixing part 455 at the upper end of the dedicated support column 45 and the bridge girder 2b of the bridge 2, and the construction of the first suspended scaffolding 4A is completed.

[0097] Next, the second suspended scaffolding 4B is installed by connecting it to the first suspended scaffolding 4A. However, the only difference between the second suspended scaffolding 4B and the first suspended scaffolding 4A is that the point where the pair of beam members 4a, 4a are connected is that in the first suspended scaffolding 4A, the vertical pipe members 3a of the vertical scaffolding 3 are connected to the dedicated support columns 45 of the first suspended scaffolding 4A, which are different connected components. Therefore, a detailed explanation is omitted.

[0098] Furthermore, the third suspended scaffolding 4C is constructed using the same method as the second suspended scaffolding 4B, so its explanation will be omitted.

[0099] Next, the fourth suspended scaffolding 4D is connected to the vertical scaffolding 3 from the third suspended scaffolding 4C, with the brace members 47 not engaged with either of the pair of beam members 4a, 4a.

[0100] Furthermore, neither of these pairs of beam members 4a, 4a has a dedicated support column 45 at its tip.

[0101] At this time, all of these beam members 4a are already folded towards the third suspended scaffolding 4C, and the worker holds the base and rotates them horizontally by 90 degrees so that the other end faces the opposing vertical scaffolding 3, connecting the pin insertion holes 411b, 412b of the upper mounting piece 411 and lower mounting piece 412 of the upper mounting member 41a with the pin insertion hole 414b at the end of the upper horizontal frame member 41, and inserts the pin 415 from above into these connected pin insertion holes 411b, 414b, 412b to fix the base of these beam members 4a.

[0102] Furthermore, a worker waiting on the scaffolding board 3d for the opposing vertical scaffolding 3 inserts the downward projection 423 of the lower mounting member 42a on the other end of the beam members 4a into the insertion hole 32b of the lower flange portion 32 provided in the vertical pipe member 3a that forms the side of the opposing vertical scaffolding 3.

[0103] Furthermore, the upper flange portion 31 provided on the vertical pipe material 3a that forms the side of the opposing vertical scaffolding 3 is inserted into the connecting insertion portion 413 of the upper mounting member 41a on one end of these beam material 4a, so that one end of these beam material 4a is connected to the vertical pipe material 3a that forms the side of the opposing vertical scaffolding 3.

[0104] Furthermore, the worker on the scaffolding board 4b for the suspended scaffolding of the third suspended scaffolding 4C and the worker on the scaffolding board 3d for the vertical scaffolding of the opposing vertical scaffolding 3 each hold the end of the brace member 47 and connect it to the brace member engagement flange portion 45d of the dedicated support column 45 of the third suspended scaffolding 4C and to the engagement member 33 provided on the vertical pipe member 3a that forms the side of the opposing vertical scaffolding 3 to which one end of the beam member 4a is connected.

[0105] Then, by fitting the mounting fitting portions 48 provided at both the left and right ends of the scaffolding board 4b for the fourth suspended scaffolding onto the upper surface of the upper horizontal frame material 41 of these beam materials 4a, 4a, multiple scaffolding boards 4b for the fourth suspended scaffolding are installed on the upper side of these beam materials 4a, 4a, and the construction of the fourth suspended scaffolding 4D is completed.

[0106] Next, the operation and effects of this embodiment will be described.

[0107] With the scaffolding 1 configured as described above, the beam members 4a can be easily connected by inserting the lower downward projection 423 into the insertion hole 32b of the lower flange portion 32 provided on the vertical pipe material 3a that forms the side of the vertical scaffolding 3, or into the insertion hole 452a of the lower flange portion 45c of the dedicated support column 45, and inserting the upper connecting insertion portion 413 into the upper flange portion 31 provided on the vertical pipe material 3a that forms the side of the vertical scaffolding 3, or into the upper flange portion 45b of the dedicated support column 45, and fixing them with the wedge member 31c. This makes it possible to easily construct the suspended scaffolding 4 (4A, 4B, 4C) in relation to the vertical scaffolding 3 or suspended scaffolding 4 (4A, 4B, 4C) that has already been constructed.

[0108] In this scaffolding 1, since the fixing portion of the beam material 4a (the connecting insertion portion 413 and downward projection 423 in the upper mounting member 41a and lower mounting member 42a that constitute the mounting member) and the rotating portion (the upper mounting pieces 411, 421 and the lower mounting pieces 412, 422) are in different positions, the force applied downward is distributed without being concentrated, and the scaffolding can be made durable enough to be used repeatedly over a long period of time.

[0109] Furthermore, with this scaffolding 1, the beam material 4a can be easily connected to the vertical pipe material 3a or dedicated support column 45 by simply inserting the downward projection 423, which is the lower fixing part of the lower mounting member 42a, into the insertion holes 32b, 452a provided in the vertical pipe material 3a or dedicated support column 45, and then attaching and fixing the connecting insertion part 413, which is the upper fixing part of the upper mounting member 41a, to the upper flange parts 31, 45b provided in the vertical pipe material 3a or dedicated support column 45, resulting in good workability.

[0110] Furthermore, with this scaffolding 1, the beam member 4a without the brace member 47 is mainly unfolded by hand by holding the base and fixed with a pin 415, and the beam member 4a with the brace member 47 is unfolded by holding the brace member 47 by hand and fixing the end of the brace member 47, and then the scaffolding board 4b is attached to the upper surface of this pair of beam members 4a, 4a. This procedure increases the horizontal structural strength and also offers excellent workability.

[0111] Furthermore, with this scaffolding 1, a horizontal reinforcing beam 4a' is provided between the dedicated support columns 45, 45, which increases the overall structural strength of the suspended scaffolding 4 (4A~4D).

[0112] Furthermore, according to this scaffolding 1, as shown in Figures 9 and 10, the central axis O1 of the pivot mounting hole 411a of the upper mounting piece 411 of the upper mounting member 41a is located closer to the vertical pipe material 3a, and the central axis O2 of the pivot mounting hole 422a of the lower mounting piece 422 of the lower mounting member 42a is located closer to the beam material 4a, and a horizontal offset is provided between them. As a result, even during construction when workers are standing on it before the chain 5 as a lifting means is installed between the lifting means fixing part 455 at the upper end of the dedicated support column 45 and the bridge girder 2b of the bridge 2, the suspended scaffolding 4 has cantilever strength that prevents it from sagging downwards.

[0113] Furthermore, with this scaffolding 1, as shown in Figure 9, the lower mounting piece 422 of the lower mounting member 42a is formed to be longer than the upper mounting piece 421, and the lower horizontal frame member 42 makes contact over a longer area, so that it can withstand a larger load F, and the suspended scaffolding 4 has greater cantilever strength, making it less likely to sag downwards even during construction when workers are standing on it before the chain 5 as a suspension means is installed between the suspension means fixing part 455 at the upper end of the dedicated support column 45 and the bridge girder 2b of the bridge 2. [Second Embodiment] Next, a second embodiment of the present invention will be described based on Figures 22 to 25.

[0114] Figure 22 is a magnified view showing an enlarged portion of the joint between the vertical scaffolding and the suspended scaffolding in the scaffolding of the second embodiment according to the present invention. Figure 23 is a perspective view of Figure 22 taken from diagonally above. Figure 24 is a front view showing the vertical pipe material of Figure 22. Figure 25 is a perspective view of the vertical pipe material of Figure 24 taken from diagonally above. In this second embodiment, parts that are the same as or corresponding to those in the first embodiment described above are denoted by the same reference numerals and their descriptions are omitted, and only the configurations and effects that differ from the first embodiment will be described.

[0115] In this second embodiment, as shown in Figures 22 to 25, multiple vertical pipe members 3a can be connected vertically by inserting the upper tenon portion 3f from below and inserting the locking portion 3e into the locking hole portion 3g of the tenon portion 3f and locking it. Furthermore, the vertical pipe members 3a have a shape in which bulging pieces 331a are connected in a cross direction, and each bulging piece 331a has an engaging member 331 with an engaging hole 331b, which makes it easier to construct the vertical scaffolding 3 and the first suspended scaffolding 4A, and this is the main difference from the first embodiment. [Third Embodiment] Next, a third embodiment of the present invention will be described based on Figures 26 to 29.

[0116] Figure 26 is a magnified view showing an enlarged portion of the joint between the vertical scaffolding and the suspended scaffolding in the scaffolding of the third embodiment according to the present invention. Figure 27 is a perspective view of Figure 26 taken from diagonally above. Figure 28 is a front view of the attachment used in the scaffolding of Figure 26 taken from the front. Figure 29 is a perspective view of the engaging member of Figure 28 taken from diagonally above. In this third embodiment, parts that are the same as or corresponding to those in the first embodiment described above are denoted by the same reference numerals and their descriptions are omitted, and only the configurations and effects that differ from the first embodiment will be described.

[0117] In this third embodiment, as shown in Figures 26 to 29, the ends of the beam members 4a constituting the first suspended scaffolding 4A can be connected simply by fitting the attachment 332 onto the vertical pipe member 3a.

[0118] In other words, the attachment 332 has the following configuration: an attachment body portion 332a with an overall cross-section that is roughly U-shaped; a protruding piece 332c with engagement holes 332d in a cross shape provided around the upper part of the attachment body portion 332a; a downward projection 332f provided at the lower part of the attachment body portion 332a to which the brace material 47 is joined, and which is inserted into the insertion hole 34b of the bulging piece 34a of the lower flange portion 34 that is not used to join the beam material 4a of the vertical pipe material 3a; and a downward projection insertion portion 332e into which the downward projection 423 of the lower mounting member 42a on the other end side of the beam material 4a is inserted.

[0119] As a result, in this third embodiment, even if the spacing between the flange portions 31 and 34 of the vertical pipe material 3a is constant, beam materials 4a of various heights can be connected and attached simply by providing multiple types of attachments 332. [Fourth Embodiment] Next, a fourth embodiment of the present invention will be described based on Figures 30 and 31.

[0120] Figure 30 is a perspective view showing a dedicated support column in which the suspension means fixing part used in the scaffolding of the fourth embodiment of the present invention is detachable. Figure 31 is a perspective view showing a dedicated support column in which a tenon fitting, which is a connecting member, is detachable in place of the means fixing member in Figure 30. In this fourth embodiment, the same or corresponding parts as in the first embodiment described above are denoted by the same reference numerals and their descriptions are omitted, and only the configurations and effects that differ from the first embodiment will be described.

[0121] In this fourth embodiment, as shown in Figure 30, the suspension means fixing portion 455 of the dedicated support column 45' is detachable with a bolt 45e and a nut 45f. Furthermore, as shown in Figure 31, a mortise fitting 456 for inserting a connecting member (not shown) into a lock hole 456a and locking it can be detachably attached to the means fixing member 455, and for example, a support column extension member, a handrail member, or a morning glory can be connected to the upper side, which is the main difference from the first embodiment. [Fifth Embodiment] Next, a fifth embodiment of the present invention will be described based on Figures 32 to 37.

[0122] Figure 32 is a front view showing the scaffolding of the fifth embodiment according to the present invention installed on an arch-shaped bridge. Figure 33 is a perspective view of the scaffolding in Figure 32. Figure 34 is an enlarged view of part A in Figure 32. Figure 35 is an enlarged view of part B in Figure 32. Figure 36 is a perspective view showing a support extension member used in the scaffolding in Figure 32. Figure 37 is a perspective view showing a dedicated support column used in the scaffolding in Figure 32. In this fifth embodiment, parts that are the same as or corresponding to those in the first embodiment described above are denoted by the same reference numerals and their descriptions are omitted, and only the configurations and effects that differ from the first embodiment will be described.

[0123] As shown in Figure 32, the scaffolding 10 of this fifth embodiment is configured in which nine suspended scaffolding units 4A to 4I are connected and installed below the bridge girder 20b of the arch-shaped bridge 20.

[0124] In this fifth embodiment of the scaffolding 10, as shown in Figures 32 and 33, dedicated support columns 450, which are intermediate members longer than the height of the beam members 4a that make up the suspended scaffolding 4, are used to connect opposing beam members 4a at different levels, and the suspended scaffolding 4 is assembled in a V-shaped staircase manner.

[0125] When constructing this scaffolding 10, it is possible to start from existing scaffolding such as the vertical scaffolding 3 (not shown in the diagram) on the left and right, and construct it sequentially from the first suspended scaffolding 4A on the first level in substantially the same manner as in the first embodiment.

[0126] Furthermore, in this scaffolding 10, an additional scaffolding 11 is provided at the highest central part.

[0127] As shown in Figures 32 and 33, this additional scaffolding 11 is formed by connecting the upper ends of dedicated support columns 450, which are formed by connecting a support column extension member 450A to the upper side of the dedicated support column 45' shown in Figure 31 of the fourth embodiment described above at the corner of the central fifth suspended scaffolding 4E, with pipes 41', and fitting mounting fitting parts 48 provided at both the left and right ends of the scaffolding boards 4b for the suspended scaffolding between these pipes 41', thereby providing multiple scaffolding boards 4b.

[0128] The dedicated support column 450 used here is formed by connecting the support column extension members 450A, 450B, etc., shown in Figure 36 to the upper side of the dedicated support column 45' shown in Figure 31 of the fourth embodiment described above.

[0129] These support column extension members 450A and 450B include a support column body 45a similar to that of the dedicated support column 45', an upper flange portion 45b which is a fixing member provided around the upper side of the support column body 45a, a lower flange portion 45c which is a fixing member provided around the lower side of the support column body 45a, a flange portion 45d for engaging brace material provided around the space between the upper flange portion 45b and the lower flange portion 45c of the support column body 45a, a suspension means fixing portion 455, a bolt 45e, and a nut 45f.

[0130] Furthermore, these support column extension members 450A and 450B are equipped with a locking part 45g at their lower end, which allows them to be connected to a dedicated support column 45'.

[0131] Figure 34 shows the connection between the eighth suspended scaffolding 4H and the ninth suspended scaffolding 4I. The dedicated support column 450 connecting them is constructed by inserting the tenon fitting 456 into the lower part of the support column extension member 450A on the upper side of the dedicated support column 45', and then inserting the locking part 45g into the locking hole 456a and locking it in place.

[0132] Here, the upper flange portion 45b, the lower flange portion 45c, and the flange portion 45d for engaging the brace material are used on the upper support extension member 450A side of the dedicated support column 450 to connect and attach the beam material 4a and the brace material 47, thereby providing the eighth suspended scaffolding 4H.

[0133] Then, using the upper flange portion 45b, the lower flange portion 45c, and the flange portion 45d for engaging the brace material on the lower side of the dedicated support column 450, the beam material 4a and the brace material 47 are connected and attached, and the eighth suspended scaffold 4H is provided.

[0134] Furthermore, Figure 35 shows the connection between the second suspended scaffolding 4B and the third suspended scaffolding 4C. The dedicated support column 450 connecting them is constructed by connecting a support column extension member 450B to the upper side of the dedicated support column 45'.

[0135] Here, the upper flange portion 45b, the lower flange portion 45c, and the flange portion 45d for engaging the brace material are used on the upper support extension member 450B side of the dedicated support column 450 to connect and attach the beam material 4a and the brace material 47, thereby providing a third suspended scaffold 4C.

[0136] Then, using the upper flange portion 45b, the lower flange portion 45c, and the flange portion 45d for engaging the brace material on the lower side of the dedicated support column 450, the beam material 4a and the brace material 47 are connected and attached, and the second suspended scaffolding 4B is provided.

[0137] Furthermore, the dedicated support column 450 may be a single-piece dedicated support column 450A', 450B', etc., as shown in Figure 37.

[0138] Here, the height difference is increased by using a dedicated support column 450 that is longer between the second suspended scaffolding 4B and the third suspended scaffolding 4C than between the eighth suspended scaffolding 4H and the ninth suspended scaffolding 4I.

[0139] According to this fifth embodiment of the scaffolding 10, it is suitable for use in construction sites for new construction, repair, and deck replacement work on structures with varying heights, such as the bridge girders 20b of an arched bridge 20. [Sixth Embodiment] Next, a sixth embodiment of the present invention will be described based on Figures 38 to 41.

[0140] Figure 38 is a front view showing a scaffolding according to the sixth embodiment of the present invention. Figure 39 is a perspective view of the scaffolding in Figure 38. Figure 40 is an enlarged view of section C in Figure 38. Figure 41 is an enlarged view of section D in Figure 38. In this sixth embodiment, parts that are the same as or corresponding to those in the first and fifth embodiments described above are denoted by the same reference numerals and their descriptions are omitted, and only the configurations and effects that differ from the fifth embodiment will be described.

[0141] In this sixth embodiment of scaffolding, as shown in Figures 38 to 41, gap-filling members 50 are provided to fill the gaps between the dedicated support columns 450 between the upper and lower levels, which makes it difficult for tools and other objects to fall downwards from the suspended scaffolding 4 (4A to 4I), and this is the main difference from the scaffolding of the fifth embodiment.

[0142] In Figure 40, the gap-filling member 50 is provided by inserting the insertion slide portion 51a of the upper connecting insertion portion 51 on the back surface of the gap-filling member 50 into the bulging piece 451 of the upper flange portion 45b of the dedicated support column 450 that faces the side to which the beam material 4a of the eighth suspended scaffolding 4H is connected, and then inserting the wedge member 31c' into the vertical insertion hole 51b and the insertion hole 451a to fix it in place. Additionally, the gap-filling member 50 is provided by inserting the insertion slide portion 51a of the upper connecting insertion portion 51 on the back surface of the gap-filling member 50 into the bulging piece 452 of the lower flange portion 45c of the dedicated support column 450, and then inserting the wedge member 31c' into the vertical insertion hole 51b and the insertion hole 452a to fix it in place.

[0143] Furthermore, in Figure 41, the gap-filling member 50 is provided by inserting the insertion slide portion 51a of the upper connecting insertion portion 51 on the back surface of the gap-filling member 50 into the bulging piece 451 of the upper flange portion 45b on the upper side of the dedicated support column 450, which faces the side to which the beam material 4a of the third suspended scaffolding 4C is connected, and then inserting the wedge member 31c' into the vertical insertion hole 51b and the insertion hole 451a to fix it in place. Additionally, the gap-filling member 50 is provided by inserting the insertion slide portion 51a of the upper connecting insertion portion 51 on the back surface of the gap-filling member 50 into the bulging piece 456 of the intermediate flange portion 45h provided in the middle of the support column body portion 45a to which the beam material 4a is not connected, and then inserting the wedge member 31c' into the vertical insertion hole 51b and the insertion hole 451a to fix it in place.

[0144] While various embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These embodiments can be carried out in a variety of other forms, and various omissions, substitutions, modifications, and combinations are possible without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims and their equivalents.

[0145] For example, in the above embodiment, an example was described in which the chain 5 as a suspension means is provided only between the suspension means fixing part 455 and the bridge girders 2b and 20b. However, the invention is not limited to this, and the chain 5 as a suspension means may also be provided between other parts of the beam 4a and the bridge girders 2b and 20b, etc.

[0146] Furthermore, the dedicated support columns 450, which are intermediate members of the suspended scaffolding 4 (4A to 4I), may be used as vertical scaffolding or the like. [Explanation of Symbols]

[0147] 10 Scaffolding 1. Scaffolding 20. Bridges (structures) 20b Bridge girder 2. Bridges (structures) 2a Bridge pier 2b Bridge girder 3. Vertical scaffolding 3a Vertical pipe material Scaffolding planks for 3D vertical scaffolding 4. Suspended scaffolding 4A~4I Suspended scaffolding 4a Beam material 40 Beam material main body 41a Upper mounting member (mounting member) 42a Lower mounting member (mounting member) 413 Connecting insertion part (fixing part) 423 Downward projection (fixing part) 411 Upper mounting piece (rotating part) 421 Upper mounting piece (rotating part) 412 Lower mounting piece (rotating part) 422 Lower mounting piece (rotating part) 4b Scaffolding planks for suspended scaffolding 450 Dedicated support column (intermediate member) 45 Dedicated support posts 45b Upper flange portion (fixing member) 45c Lower flange section (fixing member) 47. Brace material 455 Part for fixing the suspension means 456 Mortise and tenon fitting (connecting member) 4a' Reinforcement beam material 5. Chain (suspension method) 50 Gap-filling material

Claims

1. A suspended scaffold is provided with scaffolding boards on the upper surfaces of at least one pair of beam members, and is suspended from a structure provided above, A suspended scaffold characterized in that the end of a first suspended scaffold is connected to a first position of an intermediate member extending in the vertical direction, and the end of a second suspended scaffold is connected to a second position of the intermediate member on the side opposite to the side to which the first suspended scaffold is connected, and the first position and the second position are set at different heights.

2. The suspended scaffolding according to claim 1, characterized in that a gap-filling member is attached to the intermediate member to close the gap between the first suspended scaffolding and the second suspended scaffolding.

3. The aforementioned intermediate member is at least one pair of dedicated support columns extending in the vertical direction, The suspended scaffolding according to claim 1, characterized in that the pair of dedicated support columns are provided with fixing members at the first and second positions, respectively, for connecting and fixing the ends of the first and second suspended scaffolding.

4. The beam material comprises a beam material body and an attachment member provided at the end of the beam material body for connecting and attaching to the intermediate member. The suspended scaffolding according to claim 1, characterized in that the mounting member has a fixing portion for connecting to and fixing the intermediate member, and a rotating portion that allows the beam member body to rotate horizontally while the fixing portion is connected to and fixed to the intermediate member.

5. The mounting member comprises a lower mounting member provided on the lower side of one end of the beam material body and an upper mounting member provided on the upper side of one end of the beam material body. The fixing portion provided on the lower mounting member is a downward-facing projection that is inserted into the insertion hole provided on the intermediate member, The suspended scaffolding according to claim 4, characterized in that the fixing portion provided on the upper mounting member is a mounting fixing portion that is attached and fixed to the mounting fixing portion provided on the intermediate member.

6. The suspended scaffolding according to claim 1, characterized in that one end of a brace member is rotatably engaged horizontally with one end of one of the pair of beam members, and the other end of the brace member is engaged with the intermediate member to which the other end of the other beam member is joined.

7. The suspended scaffolding according to claim 3, characterized in that a suspension means fixing part for suspending a suspension means for suspending from the structure is provided at the upper end of the dedicated support column.

8. The suspended scaffolding according to claim 7, characterized in that the upper end of the dedicated support column is detachably attached to the part for fixing the suspension means, and a connecting member for connecting a support column extension member, a handrail member, or a member including a morning glory is also detachably attached.

9. The suspended scaffolding according to claim 3, characterized in that reinforcing beam members are connected between a pair of dedicated support columns, each connected to one end of the pair of beam members.

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