Multi-story scaffolding unit

Abstract

To provide a multistory scaffold unit having a holding mechanism causing no strain deformation or the like in a skeleton structure, when hanging up and down the multistory scaffold unit.SOLUTION: In a multistory scaffold unit, lower part holding means (14) are provided which are positioned at lower parts of a skeleton structure (3) of the multistory scaffold unit, straddle multiple columns and hold lower end parts of the columns, and upper part holding means (15) are provided which are positioned at upper parts, straddle the multiple columns and hold upper end parts of the columns. Cables (16) vertically extending through the skeleton structure are stretched between both holding means (14, 15) to form a holding mechanism (13) holding the skeleton structure from above and below.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a multi-story scaffolding unit that is attached to the outer surface of a building by being lifted by a crane, and is equipped with a holding mechanism that holds the frame structure so that it does not become distorted or deformed when being lifted and lowered. [Background technology]

[0002] As shown in Figures 1 and 2, the construction of high-rise buildings has traditionally been carried out by proceeding from the lower floors to the upper floors, with each floor consisting of a certain number of upper and lower floors. In the example shown, one floor unit consisting of four floors is formed on one column, and as shown, the columns are lifted by a crane and the upper floors are constructed one above the lower floors by repeatedly adding columns.

[0003] 1 and 2 show an example in which, for a given story, construction work on a lower story column 1a (section n) is completed, and then an upper story column 1b (section n+1) is being constructed.

[0004] In order to carry out the work required for construction on each floor, a multi-story scaffolding unit 2 is attached to the exterior of the building. The multi-story scaffolding unit 2 is constructed so that work floors formed by scaffolding boards can be provided for the upper and lower floors (four floors in the example shown) corresponding to the upper and lower floors included in each floor (four floors in the example shown).

[0005] After being constructed on the ground, the multi-story scaffolding unit 2 is lifted by a crane using a hoisting means M such as a wire and attached to a predetermined floor. Figure 1(A) shows the multi-story scaffolding unit 2 attached to a column 1a on the lower floor.

[0006] When the predetermined work on the lower floor is completed, the column 1b on the upper floor is lifted by a crane and connected to the column 1a, as shown in FIG. 1(B) and FIG. 2(A).

[0007] At this time, as shown in Figures 2(A), (B), and (C), the multi-story scaffolding unit 2 is lifted up by a crane using a lifting means M, and is removed from the column 1a of the lower story and attached to the column 1b of the upper story. In other words, a re-mounting (lifting up) is performed.

[0008] Incidentally, for the convenience of carrying in and out, it is preferable that the multi-story scaffolding unit 2 be configured so that it can be assembled and disassembled in the same way as general temporary scaffolding. For this reason, it is desirable to construct the multi-story scaffolding unit 2 by using construction materials for single-pipe scaffolding or frame scaffolding.

[0009] Figure 3 shows a multi-story scaffolding unit 2, in which a framework structure 3 is constructed using the structural members used in single-tube scaffolding. The bottom layer 3a and the top layer 3b are shown, while the middle layers are omitted. Figure 4 shows the next layer, which is connected to the middle layer 3c, in a disassembled state.

[0010] The framework structure 3 is made up of multiple supports 4, each made up of a column material 5 detachably connected in the vertical direction, and is constructed by connecting the supports 4 arranged in parallel in the width direction (W direction in the figure) with connecting materials 6, and connecting the supports 4 arranged in parallel in the depth direction (D direction in the figure) with connecting materials 7. In the illustrated example, connecting pipe materials 6a, leading handrails 6b, and other members are used as the connecting materials 6, and cross members 7a and other members are used as the connecting materials 7, but it should be understood that when materials for constructing framework scaffolding are used, the configuration will be different from that shown in the figure.

[0011] Therefore, in the configuration shown in the figure, in each story of the multi-story scaffolding unit 2, scaffolding boards 8 are erected on cross members 7a, 7a spaced apart in the width direction W, providing work floors that make up the upper and lower stories.

[0012] (Strut configuration) The pillar 5 is made of a metal pipe material as shown in Fig. 5(A), and a joint 9 is inserted into an opening 5U at the upper end, and an upper pillar 5a is connected coaxially via the joint 9 to form a support 4. The joint 9 has a lower plug portion 9a and an upper plug portion 9b.

[0013] The lower plug portion 9a is inserted into the opening 5U at the upper end of the pillar 5, and the spring-loaded locking pin 10a is inserted and locked into the locking hole 10b of the pillar 5a, thereby attaching the plug portion 9a. In this state, the upper plug portion 9b is positioned facing upward.

[0014] The upper plug portion 9b is provided with a spring-loaded locking rod 11 that is inserted diametrically slidably, and a locking hook 11a is formed on the locking rod 11. As shown in Figures 5(B) and 5(C), the post 5a is lowered from above, whereby the upper plug portion 9b is inserted into the opening 5L at the lower end of the post, and the locking hook 11a is inserted and locked into the locking hole 11b of the post 5a, thereby completing the insertion and attachment.

[0015] In this way, by connecting and inserting the pillars 5 on the same axis, a support 4 extending from the bottom layer 3a to the top layer 3b of the framework structure 3 is formed.

[0016] (fastening means) As shown in Figures 5(D) and (E), the connecting pipe material 6a and cross member 7a made of metal pipes that make up the above-mentioned connecting materials 6 and 7 are fixed to predetermined locations of the pillar material 5 via fastening means 12.

[0017] In the illustrated example, a wedge fastening method fastening means 12 is shown, and is configured so that jaw fittings 12b provided on the ends of the connecting pipe material 6a and the cross member 7a are fitted into flanges 12a fixed to the column material 5, and wedges 12c that penetrate jaw fittings 12b and flanges 12a are driven in to fasten them together. Note that fastening methods other than the wedge fastening method may also be used. [Prior art documents] [Patent documents]

[0018] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-222884 [Patent Document 2] JP 2013-11119 A [Patent Document 3] Japanese Patent Application Laid-Open No. 2014-122468 Summary of the Invention [Problem to be solved by the invention]

[0019] As explained based on Figures 1 and 2, the multi-story scaffolding unit 2 is used by being lifted up by a crane and repeatedly moved (raised) according to the construction work progressing from the lower floors to the upper floors of a high-rise building.

[0020] As mentioned above, the framework structure 3 that makes up the multi-story scaffolding unit 2 is assembled using components that are used to construct conventional dismantled temporary scaffolding, so there are no problems with strength and rigidity in parts, but overall it was not designed with rigidity when lifted in mind. For this reason, there is a risk of distortion or deformation occurring in the connecting parts of the components when lifted (when lifted up).

[0021] When lifting the frame structure 3, a lifting means M such as a wire is connected to a fixing member provided on the top layer 3b of the frame structure 3, and the fixing member is pulled up, thereby lifting the frame structure 3 while it is suspended from the fixing member. However, the frame structure 3 configured as described above is designed to be able to adequately withstand compressive loads in the vertical direction, but is not designed with tensile loads in mind, so there is a problem in that the connection strength in the vertical tensile direction is insufficient.

[0022] Furthermore, the frame structure 3 constituting the multi-story scaffolding unit 2 is assembled on the ground and then lifted up by a crane. At this time, in order to meet the needs of safety, ease, speed, etc. of the assembly, it is preferable to perform the assembly work so that the frame structure 3 is completed in a horizontal position. However, in this case, when the completed multi-story scaffolding unit 2 is raised by the crane, it is forced to change its position from a horizontal position to an upright position, and it is subjected to bending moments in various places, which may cause distortion, etc. [Means for solving the problem]

[0023] The present invention provides a multi-story scaffolding unit that solves the above-mentioned problems. The means for achieving this is a multi-story scaffolding unit that can be attached to the outer surface of a building by being lifted by a crane. The scaffolding unit is made up of multiple columns that are detachably connected in the vertical direction. The columns that are arranged side by side in the width direction are connected via connecting members, and the columns that are arranged side by side in the depth direction are connected via connecting members. To withstand vertical compressive loads In a configuration having a constructed framework structure, The support columns extend from the bottom to the top of the frame structure by connecting and inserting pillars on the same axis. A lower holding means is provided at the bottom of the framework structure to straddle the plurality of columns and hold the lower ends of the columns, and an upper holding means is provided at the top to straddle the plurality of columns and hold the upper ends of the columns, and a cable extending vertically through the framework structure is stretched between the two holding means. and tighten By doing so, the framework structure can be In a clamped state The point is that it is configured with a holding mechanism for holding.

[0024] In a preferred embodiment, the upper holding means is provided with a lifting device that is lifted by the lifting means of a crane, and the lifted upper holding means is configured to suspend the load of the framework structure via the ropes and the lower holding means.

[0025] The framework structure has a scaffolding board positioned midway in the width direction, and a pair of pillars arranged side by side at least in the depth direction on both sides of the scaffolding board, and it is preferable that the holding mechanism is configured to include two sets of holding mechanisms that hold the pair of pillars arranged side by side on both sides of the scaffolding board from above and below.

[0026] In an embodiment of the present invention, the pillar material constituting the support is formed from metal pipe material, and upper and lower socket portions are formed by the openings at the upper and lower ends of multiple pillars held from above and below by the holding mechanism, the lower holding means is formed by a bar member that straddles the lower ends of the multiple pillars, and plug portions provided on the bar member are inserted into the lower socket portions of the pillars, and the upper holding means is formed by a bar member that straddles the upper ends of the multiple pillars, and plug portions provided on the bar member are inserted into the upper socket portions of the pillars. [Effects of the Invention]

[0027] According to the present invention, the multi-story scaffolding unit 2 spans multiple pillars 4 of the framework structure 3, and sandwiches the pillars 4 from above and below between upper holding means 15 and lower holding means 14, and a cable 16 extending vertically through the framework structure 3 is stretched between the two holding means 15, 14 to form a holding mechanism 13 that holds the framework structure 3 from above and below.This has the effect of eliminating the risk of the framework losing its shape or being distorted or deformed in some areas when it is lifted by the crane's lifting means M. [Brief explanation of the drawings]

[0028] [Figure 1] Regarding the conventional technology for construction work using multi-story scaffolding units, (A) is an explanatory diagram showing a state in which a multi-story scaffolding unit is attached facing a column of a lower level on a specified level, and (B) is an explanatory diagram showing a state in which a column of the next level is placed on top of the column. [Figure 2]Continuing from Figure 1, (A) is an explanatory diagram showing the state in which the multi-story scaffolding unit is being pulled up with the upper column connected to the lower column, (B) is an explanatory diagram showing the state in which the multi-story scaffolding unit is facing the upper column, and (C) is an explanatory diagram showing the state in which the multi-story scaffolding unit is attached to the upper column. [Figure 3] This is an oblique view showing the bottom and top layers of an example of a multi-story scaffolding unit that has been used to construct a framework structure, with the middle layer omitted. [Figure 4] This is an oblique view showing the next layer to be installed on top of the constructed intermediate layer in an exploded state, in an example of a multi-layer scaffolding unit that has constructed a framework structure. [Figure 5] Regarding the components that make up the framework structure, (A), (B), and (C) are perspective views showing the connection structure and connection method of the column components that make up the support, and (D) and (E) are perspective views showing the structure and connection method of the fastening means for the support and the connecting component. [Figure 6] FIG. 1 is a perspective view showing the relationship between a framework structure and a retaining mechanism in a multi-story scaffolding unit according to one embodiment of the present invention. [Figure 7] Regarding the framework structure and the holding mechanism, (A) is a plan view of the framework structure, and (B) is a plan view of the framework structure with the holding mechanism attached. [Figure 8] This is an oblique view showing the state in which the framework structure is held by the holding mechanism and the multi-story scaffolding unit is lifted. [Figure 9] 1A is a perspective view showing the relationship between the lower holding means and the support pillar in one embodiment of the holding mechanism, and FIG. 1B is a perspective view showing the state in which the lower holding means is attached to the lower end of the support pillar. [Figure 10] 1A is a perspective view showing the relationship between the upper holding means and the support pillar in one embodiment of the holding mechanism, and FIG. 1B is a perspective view showing the upper holding means attached to the upper end of the support pillar. [Figure 11] FIG. 10 is a cross-sectional view showing the upper holding means attached to the upper end of the support pole. DETAILED DESCRIPTION OF THE INVENTION

[0029] A preferred embodiment of the present invention will be described in detail below with reference to FIGS.

[0030] In Figures 6 and 7, the multi-layer scaffolding unit 2 (hereinafter simply referred to as "scaffolding unit 2") is illustrated as having the above-mentioned configuration described based on Figures 1 to 5, but it should be understood that this is not necessarily limited to this.

[0031] In the present invention, the scaffolding unit 2 is provided with a lower holding means 14 located at the bottom of the framework structure 3, spanning multiple pillars 4 to hold the lower ends of the pillars, and an upper holding means 15 located at the top, spanning multiple pillars 4 to hold the upper ends of the pillars, and a cable 16 extending vertically through the framework structure 3 is stretched between the two holding means 14, 15, thereby forming a holding mechanism 13 that holds the framework structure 3 from above and below.

[0032] In the illustrated embodiment, the frame structure 3 has a scaffolding board 8 located midway in the width direction W, and at least a pair of posts 4 arranged side by side in the depth direction D on both sides of the scaffolding board 8. In the specific example of the frame structure 3 shown in Figure 7(A), a pair of posts 4R1, 4R2 for supporting the scaffolding board are arranged side by side in the depth direction D on the right side of the scaffolding board 8, and a pair of posts 4L1, 4L2 for supporting the scaffolding board are arranged side by side in the depth direction D on the left side. A cross member 7a is erected on each of the posts (4R1, 4R2) (4L1, 4L2) arranged side by side as a pair, and supports the hook fittings of the scaffolding board 8.

[0033] Furthermore, the frame structure 3 in the illustration has three outer supports 4R3, 4R4, 4R5 arranged side by side in the depth direction D, located to the right of the right-side supports 4R1, 4R2, and three outer supports 4L3, 4L4, 4L5 arranged side by side in the depth direction D, located to the left of the left-side supports 4L1, 4L2.

[0034] 6 and 8, support seats 17 (the right support seat is indicated as 17R and the left support seat as 17L in the drawings) are provided at the lower ends of the set of three support posts (4R3, 4R4, 4R5) (4L3, 4L4, 4L5). The support seats 17 have plugs 17b protruding from the upper surface of three support bars 17a formed from square metal pipes extending in the depth direction D. The plugs 17b are inserted into openings 5L (see FIG. 5(B)) at the lower ends of the post materials 5 constituting the support posts, and by using the locking holes 11b at the lower ends, bolts are inserted through the post materials 5 and plugs 17b via through-holes provided in the plugs 17b and by passing through the post materials 5 and plugs 17b, and then fastened with nuts.

[0035] By providing such a support seat 17 at the lower end of the framework structure 3, when the framework structure 3 assembled on the ground as described above is raised by a crane from a lying position to an upright position, the support seat 17 installed on the ground serves as a fulcrum, thereby reducing the load acting on the vicinity of the lower end of the support column 5 of the framework structure 3.

[0036] (Configuration of retention mechanism) In the preferred embodiment shown in the figures, the holding mechanism 13 is provided by two sets of mechanisms: a right-side holding mechanism 13R that holds from above and below a pair of supports 4R1, 4R2 facing the right side of the scaffolding plank 8, and a left-side holding mechanism 13L that holds from above and below a pair of supports 4L1, 4L2 facing the left side of the scaffolding plank 8. The two sets of holding mechanisms 13R, 13L have the same configuration, and therefore will be described below as holding mechanisms 13 without distinguishing between left and right.

[0037] As described above, the holding mechanism 13 is composed of a lower holding means 14 that holds the lower end of the support 4, an upper holding means 15 that holds the upper end of the support, and a rope 16, and preferably includes a tightening means 18 (see Figure 8) for tightening the rope 16.

[0038] (Lower holding means) 9(A), the lower holding means 14 is composed of a bar member 19 formed from a metal square pipe extending in the depth direction D, and is provided with a pair of metal plug portions 20 protruding from the upper surface of the bar member 19, and a locking fitting 21 is provided in the longitudinal center of the bar member 19. In this case, the spacing between the pair of plug portions 20, 20 is configured to match the spacing between the pair of parallel-arranged supports (4R1, 4R2) (4L1, 4L2) described above.

[0039] The plug portion 20 is composed of a seat portion 20a made of a short pipe with inner and outer diameters approximately the same as those of the pipe-made pillar material 5 that constitutes the support, and a connecting portion 20b made of a pipe that extends concentrically from the seat portion 20a and is inserted into the pillar material 5, and is provided with a connecting hole 20c that penetrates the diameter of the connecting portion 20b.

[0040] The locking fittings 21 are made of, for example, a metal rod bent into an inverted U shape, and it is preferable that a pair of locking fittings 21, 21 are arranged side by side by fixing them to both sides of the bar member 19 by welding or the like, and a through hole 21a is formed by protruding the bent part of the rod above the bar member 19.

[0041] 9(B), the opening 5L at the lower end of the pillar material 5 constituting the lowest part of the pillars (4R1, 4R2) (4L1, 4L2) is used as a socket portion 4U, and the plug portion 20 is inserted into the socket portion. With the lower end surface of the pillar material 5 abutting against the seat portion 20a, the locking hole 11b provided near the lower end of the pillar material 5 is used to insert the bolt 22a from the locking hole 11b through the connecting hole 20c and tighten the nut 22b. This completes the attachment of the lower holding means 14 to the lower ends of the pillars (4R1, 4R2) (4L1, 4L2).

[0042] (Upper holding means) 10 and 11, the upper holding means 15 is configured by a bar member 23 formed of a metal square pipe extending in the depth direction D, and is provided with a pair of metal plug portions 24 protruding from the underside of the bar member 23, a locking fitting 25 is provided in the longitudinal center of the bar member 23, and hangers 26 are provided protruding from the upper surface near both ends of the bar member 23. In this case, the spacing between the pair of plug portions 24, 24 is configured to match the spacing between the pair of parallel-arranged supports (4R1, 4R2) (4L1, 4L2) described above.

[0043] The plug portion 24 is composed of a seat portion 24a made of a short pipe with inner and outer diameters approximately the same as those of the pipe-made pillar material 5 that constitutes the support, and a connecting portion 24b made of a pipe that extends concentrically from the seat portion 24a and is inserted into the pillar material 5, and is provided with a connecting hole 24c that penetrates the diameter of the connecting portion 24b.

[0044] The locking fittings 25 are made of, for example, a metal rod bent into a U-shape, and it is preferable that a pair of locking fittings 25, 25 are arranged side by side by fixing them to both sides of the bar member 23 by welding or the like, and a through hole 25a is formed by protruding the bent portion of the rod below the bar member 23.

[0045] The suspender 26 forms a ring-shaped portion having a through hole 26 a, and a leg portion hanging down from the ring-shaped portion is fixed to the bar member 23 .

[0046] 10(B) and 11, the opening 5U at the upper end of the pillar material 5 constituting the uppermost portion of the pillars (4R1, 4R2) (4L1, 4L2) is used as a socket portion 4U, and the plug portion 24 is inserted into the socket portion. With the upper end surface of the pillar material 5 abutting against the seat portion 24a, the locking hole 10b provided near the upper end of the pillar material 5 is used to insert the bolt 27a from the locking hole 10b through the connecting hole 4c and tighten the nut 27b. This completes the attachment of the upper holding means 15 to the upper ends of the pillars (4R1, 4R2) (4L1, 4L2).

[0047] As described above, the opening 5U at the upper end of the pillar material 5 can be opened by removing the joint 9 provided at the upper end thereof. Therefore, by removing the joint 9 from the pillar material 5 that constitutes the uppermost part of the support (4R1, 4R2) (4L1, 4L2), a socket portion 4U for attaching the upper holding means 15 is provided, as shown in Figure 6.

[0048] (search line) As shown in Figure 8, the framework structure 3 of the scaffolding unit 2 is formed by tensioning a pair of pillars 4R1, 4R2 arranged side by side on the right side and a pair of pillars 4L1, 4L2 arranged side by side on the left side, with the lower holding means 14 attached to the lower ends of the pillars and the upper holding means 15 attached to the upper ends thereof, across each pair of pillars, and a cable 16 extending vertically through the framework structure 3 to both holding means 14, 15, thereby forming a right-side holding mechanism 13R and a left-side holding mechanism 13L, which hold the framework structure 3 from above and below.

[0049] The cable 16 may be any cable having sufficient strength and flexibility, such as a wire rope or chain, and is stretched across the lower holding means 14 and the upper holding means 15 by being inserted through the through hole 21a of the locking fitting 21 of the lower holding means 14 and the through hole 25a of the locking fitting 25 of the upper holding means 15, thereby holding the frame structure 3 from above and below.

[0050] The fastening means 18 may be a known means such as a turnbuckle or a ratchet wheel with a reverse rotation prevention pawl, and therefore a detailed description thereof will be omitted.

[0051] (action) By attaching the right-side holding mechanism 13R and the left-side holding mechanism 13L as described above, the columns (4R1, 4R2) (4L1, 4L2) of the framework structure 3 are held in a clamped state from above and below. Therefore, by lifting the hoisting tool 26 of the upper holding means 15 with the hoisting means M of the crane, the scaffolding unit 2 can be lifted appropriately.

[0052] The load of the scaffolding unit 2 lifted by the lifting means M is supported by the upper holding means 15. At this time, the upper holding means 15 straddles a plurality of pillars (4R1, 4R2) (4L1, 4L2) and has ropes 16 stretched between it and the lower holding means 14 provided at the lower ends of the pillars, thereby holding the framework structure 3 in a state where it is clamped from above and below in the axial direction of the pillars, so that the framework can be lifted suitably without risking deformation or distortion in certain parts when being lifted. [Explanation of symbols]

[0053] M Lifting means 1 Column 2-story scaffolding unit 3. Frame structure 3a Bottom layer 3b Top layer 3c middle class 4 pillars 4U, 4L socket section 5 Pillar material 5a Upper pillar 5U top opening 5L Bottom opening 6, 7 Connecting material 6a Connecting pipe material 6b Leading handrail 7a Horizontal member 8 Scaffolding Planks 9 Joints 9a Lower plug 9b Upper plug 10a Locking pin 10b Locking hole 11 Locking rod 11a Locking hook 11b Locking hole 12 Fastening means 12a flange 12b Jaw bracket 12c wedge 13 Retention mechanism 14 Lower holding means 15 Upper holding means 16 Cable 17 Support seat 17a Support bar 17b plug 18 Fastening means 19 Bar member 20 Plug section 20a seat 20b Connecting part 20c connection hole 21 Locking hardware 21a through hole 22a bolt 22b Nut 23 Bar member 24 Plug section 24a Seat part 24b Connection part 24c connection hole 25 Locking hardware 25a through hole 26 Hanging equipment 26a through hole 27a Bolt 27b Nut

Claims

1. A multi-story scaffolding unit that can be attached to the exterior surface of a building by being lifted by a crane, and which has a framework structure constructed so that it can withstand vertical compressive loads by connecting multiple columns that are detachably connected in the vertical direction with connecting members that connect columns that are arranged side by side in the width direction and columns that are arranged side by side in the depth direction via connecting members. The support (4) extends from the bottom layer (3a) to the top layer (3b) of the framework structure (3) by connecting and inserting pillars (5) on the same axis. A multi-story scaffolding unit characterized by comprising a lower holding means (14) located at the bottom of the framework structure (3) that straddles a plurality of pillars and holds the lower ends of the pillars, and an upper holding means (15) located at the top that straddles the plurality of pillars and holds the upper ends of the pillars, and a holding mechanism (13) that holds the framework structure in a clamped state from above and below by stretching and tightening cables (16) extending vertically through the framework structure between the two holding means (14, 15).

2. The multi-story scaffolding unit described in claim 1, characterized in that the upper holding means (15) is provided with a lifting device (26) that is lifted by the lifting means (M) of a crane, and the lifted upper holding means (15) is configured to suspend the load of the framework structure (3) via the ropes (16) and the lower holding means (14).

3. The framework structure (3) has a scaffolding board (8) positioned at the middle of the width direction (W), and a pair of supports (4R1, 4R2) (4L1, 4L2) arranged side by side at least in the depth direction (D) on both sides of the scaffolding board (8), A multi-story scaffolding unit as described in claim 1 or 2, characterized in that the holding mechanism (13) is composed of two sets of holding mechanisms (13R, 13L) that hold a pair of posts arranged side by side on both sides of the scaffolding board from above and below.

4. The pillars (5) constituting the pillars are formed of metal pipes, and upper end openings (5U) and lower end openings (5L) of the pillars held from above and below by the holding mechanism form upper end socket portions (4U) and lower end socket portions (4L), The lower holding means (14) is formed by a bar member (19) that straddles the lower ends of the plurality of support columns, and a plug portion (20) provided on the bar member is inserted into a socket portion at the lower end of the support column, A multi-story scaffolding unit as described in claim 1, 2 or 3, characterized in that the upper retaining means (15) is formed by a bar member (23) that spans the upper ends of the multiple pillars, and a plug portion (24) provided on the bar member is inserted into the upper end socket portion of the pillar.

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