Connecting material for temporary scaffolding and scaffolding set for wedge binding type scaffolding

Abstract

To provide a connecting material for a temporary scaffold capable of preventing slippage of a ledger plate without taking extra labor and time in assembling and disassembling and enhancing safety.SOLUTION: In a temporary scaffolding connecting member 1 of a metal pipe body which is connected to an erected support 3 and installed in an inter-beam direction for juxtaposing and locking two or more ledger plates 2 provided with a hook part 21, a pair of two piece curved rectangular plate-like metal fittings 11 arranged by providing a separation part 14 at a predetermined position between the ledger plates to be locked are fixed along a peripheral surface of a body 13.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to temporary scaffolding ties and a scaffolding set for wedge-tightening scaffolding that are suitable for supporting cloth boards used as work floors or walkways on temporary scaffolding for indoor or outdoor work at construction sites, civil engineering sites, etc. [Background technology]

[0002] Scaffolding, which serves as a temporary work floor or walkway for work in building construction or renovation, or civil engineering work, comes in a variety of types: single-pipe scaffolding, which is assembled by connecting steel pipes (single pipes) with clamps and attaching horizontal sheeting; frame scaffolding, which is placed on the ground and connects rectangular or square frames made of iron or aluminum to which sheeting is attached; assembled scaffolding such as wedge-tight scaffolding, which uses steel pipes with fixed fastening points as supports; and suspended scaffolding, in which sheeting is suspended from above by steel pipes or the like. Scaffolding materials are assembled and used according to the site conditions and the shape and size of the building, and then dismantled when work is completed.

[0003] The scaffolding materials used in wedge-tight scaffolding primarily consist of posts that are installed vertically from the floor; ties that are connected to the posts with clamps or other devices and installed horizontally across the floor (generally perpendicular to the wall being worked on) at sufficient height for workers; baseboards that are connected to the posts with clamps or other devices and installed horizontally across the floor (generally parallel to the wall being worked on); and fabric boards that have hooks on both ends of the scaffolding boards used as work floors or walkways and can be attached to the ties to create a continuous work walkway. The posts, baseboards, and ties are often tubular components made of steel or other metals, while the fabric boards are often plate-shaped components made of steel or other metals. Because the number of each scaffolding material required varies depending on the site, they are often rented as a set. For example, fabric boards and ties from different manufacturers may be used in combination, or multiple types of fabric boards with different widths and shapes may be used.

[0004] Sheet metal boards are generally long, plank-like components with widths of 240, 250, or 500 mm, and are used as flooring materials by lining up multiple sheets. The four corners of the scaffolding boards that make up the plank section often have hooks attached, which are metal fittings that protrude longitudinally for attaching to connecting materials. If there are baseboards at approximately the same height as the sheet metal boards, the baseboards will be parallel to the length of the one or more lined-up sheet metal boards when assembled. When attaching sheet metal boards to connecting materials, the hooks of the sheet metal boards are hung from above in the radial direction of the connecting materials at both ends of the sheet metal board's length. By hanging the short side of one sheet metal board on the connecting material with the hooks hung on it, and then hanging the short side of another sheet metal board on the opposite side, this process can be repeated to connect the sheet metal boards longitudinally, creating walkways and work floors.

[0005] The Industrial Safety and Health Regulations stipulate that the gap between flooring materials must be 30mm or less, except in the case of suspended scaffolding. Therefore, when assembling, the spacing between the cloth boards must not exceed 30mm.

[0006] However, there was a problem in that the cloth plates would shift during normal work, causing the spacing between the plates to exceed 30 mm, which posed a safety risk to workers walking over the cloth plates.

[0007] To address this problem, a method of connecting scaffolding boards using detachable clip materials has been proposed (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-275685 Summary of the Invention [Problem to be solved by the invention]

[0009] However, the conventional scaffolding plank connection method described above had the problem that the planks would easily move when a lateral force was applied. Furthermore, because the clip material was detachable, there was a risk of the planks falling when attaching or detaching the clip material or when passing over the clip material during use, and there was also the problem that it took more time and effort than usual to attach and detach the planks during assembly and disassembly, which requires speed, resulting in additional labor costs.

[0010] The present invention was made in consideration of these problems, and aims to provide a scaffolding material set for temporary scaffolding and a wedge-tightening scaffolding that can prevent the sheet metal from shifting without requiring extra time or effort during assembly and disassembly, thereby increasing safety. [Means for solving the problem]

[0011] A first aspect of the present invention is a metal tubular temporary scaffolding tie that is connected to an upright support and used to fasten two or more cloth plates provided with hook portions in a juxtaposed manner, A connecting material for temporary scaffolding is provided, characterized in that a pair of curved rectangular plate-shaped metal fittings, arranged with a space between them, are fixed along the periphery of the main body at predetermined positions between the interlocking cloth plates.

[0012] According to the first aspect of the present invention, it is possible to prevent the cloth boards from shifting without requiring extra time or effort during assembly and disassembly, thereby increasing safety.

[0013] Furthermore, it is preferable that the metal fittings are cloth plate restricting devices that restrict the sliding of the cloth plate and are welded along the periphery of the main body. Since the metal fittings will not come off the main body, there is no need to worry about them falling off.

[0014] Furthermore, it is preferable that the metal fittings form band-shaped portions on the main body that create a step that the hook portions of the cloth plates cannot get over, and that the gap between adjacent cloth plates with their ends placed on the main body is maintained within a certain range. This makes it possible to more appropriately prevent slippage.

[0015] It is also preferable that the thickness of the metal fitting is 2 mm or more and 19 mm or less, the length of the metal fitting in the circumferential direction of the main body is 1 / 6 to 1 / 2 of the outer circumference of the main body, the length of the metal fitting in the longitudinal direction of the main body is 6 mm or more and 30 mm or less, the length of the separated portion is 40 mm or more and 60 mm or less, and the predetermined position is 555 mm or more and 610 mm or less from one end of the main body.

[0016] In addition, a second aspect of the present invention provides a scaffolding material set for wedge-tightening scaffolding, characterized in that it comprises a plurality of temporary scaffolding ties of the first aspect of the present invention described above, a plurality of supports, and a plurality of cloth plates with hook portions at their ends. [Effects of the Invention]

[0017] According to the present invention, it is possible to prevent the fabric boards from shifting without requiring extra time or effort during assembly and disassembly, thereby increasing safety. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a schematic diagram showing the assembly procedure (1) of a scaffolding material set for a wedge-tightening type scaffolding equipped with a temporary scaffolding tie material according to Example 1 of the present invention. [Figure 2] FIG. 1 is a schematic diagram showing the assembly procedure (2) of a scaffolding material set for a wedge-tightening type scaffolding equipped with a temporary scaffolding tie material according to Example 1 of the present invention. [Figure 3] FIG. 1 is a schematic diagram showing the assembly procedure (3) of a scaffolding material set for a wedge-tightening type scaffolding equipped with a temporary scaffolding tie material according to Example 1 of the present invention. [Figure 4] FIG. 4 is a partially enlarged view of FIG. 3. [Figure 5] 1 is a perspective view showing an example of the configuration of a temporary scaffolding tie material according to a first embodiment of the present invention. [Figure 6] 1A to 1E are (a) a plan view, (b) a front view, (c) a cross-sectional view, (d) a right side view, and (e) a bottom view showing the configuration of a temporary scaffolding tie material according to a first embodiment of the present invention. [Figure 7] 1A and 1B are a first explanatory diagram and a second explanatory diagram showing a manufacturing process of a temporary scaffolding tie material according to a first embodiment of the present invention; [Figure 8] 1 is an explanatory diagram showing a state in which a hook portion is hung on a temporary scaffolding tie material according to Example 1 of the present invention. FIG. [Figure 9] 1 is a schematic top view showing a state in which a hook portion is hung on a temporary scaffolding tie material according to Example 1 of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] Below, the present invention will be described in detail using examples of the temporary scaffolding tie material and the scaffolding material set for wedge-tightened scaffolding that includes the same, with reference to the accompanying drawings, to illustrate preferred embodiments of the present invention; however, the present invention is not limited to these examples. [Example]

[0020] FIG. 1 is a schematic diagram showing the assembly procedure (1) of a scaffolding set for a wedge-tightened scaffolding equipped with a temporary scaffolding tie member according to a first embodiment of the present invention. The scaffolding made by assembling the scaffolding set for a wedge-tightened scaffolding of this embodiment can be used as a temporary scaffolding that is assembled and used at construction sites for civil engineering structures such as buildings, bridges, and tunnels, and then dismantled and removed after completion. The temporary scaffolding tie member 1 shown in FIG. 1 is a steel tubular member with wedge portions 12 at both ends that are inserted into flanges 31 of supports 3 to connect the support 3 and the tie member 1, and metal fittings 11a and 11b are attached by welding. The tie member 1 is one of the scaffolding components and serves as a horizontal member between two supports. The tie member 1 is suitable for use in a wedge-tightened scaffolding as shown in FIG. 1, but it may also be used in a frame scaffolding. The connecting material 1 is connected to the upright support 3 and installed in the beam-to-beam direction.

[0021] Column 3b, which is erected in the span direction and separated by the length of the tie material from column 3a, is connected to column 3a by tie material 1a. The pair of columns 3a, 3b and the pair of columns 3c, 3d, which are erected in the longitudinal direction and separated by the length of the fabric boards, are connected to each other by tie material 1b. The direction perpendicular to the longitudinal direction is the span direction, and for example, in scaffolding along the wall surface of a structure, the direction parallel to the wall surface is the longitudinal direction.

[0022] FIG. 2 is a schematic diagram showing assembly procedure (2) of a scaffolding set for a wedge-tightening scaffold equipped with temporary scaffolding ties according to Example 1 of the present invention. As shown in FIG. 2, the ends of cloth plates 2 are placed on ties 1 connected to supports 1, and the cloth plates 2 are then draped across the ties 1. The cloth plates 2 have plank-shaped scaffolding boards, i.e., floor portions 22, and are provided with hook portions 21 at their ends that hook onto the ties 1 from above to hold the cloth plates in place. More specifically, the hook portions 21 are provided protruding forward in the longitudinal direction from four corners of the floor portion 22. In FIG. 2, the cloth plates 2 are a combination of a 500 mm-wide cloth material 2a and a 240 mm-wide cloth material 2b. The ties 1a and 1b are connected by juxtaposing the cloth plates 2a and 2b, which have hook portions at their four corners. Cloth plates 2a and 2b are arranged side by side, spanning connecting member 1a connected to a pair of supports 3a and 3b and connecting member 1b connected to a pair of supports 3c and 3d. The hook portions 21 at the ends are hooked onto connecting member 1 from above. In FIG. 2, hook portion 21a of cloth plate 2a and hook portion 21b of the adjacent cloth plate 2b are hooked between metal fittings 11a and 11b. Metal fittings 11a and 11b are a pair of metal fittings arranged with a spacer at a predetermined position between the cloth plates to be engaged. In this embodiment, two cloth plates are engaged with connecting member 1, but three or more cloth plates may be arranged side by side. Even with three or more cloth plates, one pair of metal fittings 11 on connecting member 1 can prevent misalignment that would result in a gap of more than 30 mm between them.

[0023] Figure 3 is a schematic diagram showing the assembly procedure (3) of a scaffolding set for a wedge-tightening type scaffolding equipped with temporary scaffolding ties according to Example 1 of the present invention. The scaffolding set for a wedge-tightening type scaffolding of this example, which includes multiple ties 1, multiple supports 3, multiple sheet metal boards 2 with hooks at their ends, and various accessories, can be assembled to create an aerial walkway or work floor for workers to walk through. As shown in Figure 3, the ties 1 serve to support the sheet metal boards 2 that will form the work floor or walkway. The metal fittings 11 function as a pair of sheet metal board restrainers that regulate the sliding of the sheet metal boards.

[0024] Figure 4 is a partial enlarged view of Figure 3. Four hook portions 21 of the engaged fabric plate 2 are sandwiched in a spaced portion 14 between metal fittings 11a and 11b of the connecting material 1. Misalignment of the hook portions is restricted only within the spaced portion 14.

[0025] Fig. 5 is a perspective view showing an example of the configuration of a temporary scaffolding tie member according to Example 1 of the present invention. As shown in Fig. 5, tie member 1 has wedge portion 12 at the end of main body 13, which is a tubular body, and a pair of curved rectangular plate-like metal fittings 11a and 11b fixed to the middle of main body 13 along the circumferential surface of main body 13. Around metal fittings 11a and 11b is welded portion 111, which fastens main body 13 and metal fitting 11 by welding. Metal fittings 11a and 11b are spaced apart to a certain extent. Separation portion 14, which is the gap between metal fittings 11a and 11b, is part of the circumferential surface of main body 13.

[0026] FIG. 6 shows the configuration of a temporary scaffolding tie according to Example 1 of the present invention, with (a) a plan view, (b) a front view, (c) a cross-sectional view, (d) a right side view, and (e) a bottom view. FIG. 6(a) is a top view of tie 1, an example of a temporary scaffolding tie according to the present invention. Metal fittings 11 are arranged in parallel and welded in pairs to the main body 13. The rear view is symmetrical to the front view of FIG. 6(b). The left side view is the same as the right side view of FIG. 6(d). FIG. 6(c) is a cross-sectional view taken along the dashed line AA in FIG. 6(a).

[0027] In Example 1, the metal fittings 11a and 11b have a thickness of 2 mm, a length of 40 mm in the circumferential direction of the connecting material 1, and a length of 25 mm in the longitudinal direction of the connecting material 1. These sizes are examples, and the thickness of the metal fittings is preferably 2 mm or more and 19 mm or less. A thickness of 2 mm or more is highly effective in preventing the hook portion from shifting above the metal fittings due to impact, etc. A thickness of 19 mm or less does not get in the way when stacking or holding the connecting material during transportation or assembly / disassembly, is not bulky, and prevents costs from increasing. It is preferable that the length of the metal fittings in the circumferential direction of the connecting material body is 1 / 6 to 1 / 2 of the outer circumference of the connecting material body. When the length in the circumferential direction of the body is 1 / 6 or more of the outer circumference of the body, the contact area with the hook portion is large, resulting in a high stopper effect. When the length in the circumferential direction of the body is 1 / 2 or less of the outer circumference of the body, the metal fittings are easy to bend and are not large, preventing costs from increasing. The length of the metal fitting 11 in the longitudinal direction of the body of the connecting material is preferably 6 mm or more and 30 mm or less. If the length in the longitudinal direction of the body is 6 mm or more, it is more effective in preventing the hook portion from accidentally climbing over the metal fitting. If the length in the longitudinal direction of the body is 30 mm or less, the metal fitting is easy to bend and is not large, which prevents high costs.

[0028] FIG. 7 shows (a) a first explanatory diagram and (b) a second explanatory diagram illustrating the manufacturing process of a temporary scaffolding tie according to Example 1 of the present invention. Metal fittings 11a and 11b are made from the thin steel plate shown in FIG. 7(a). Metal fittings 11a and 11b have a flat portion 112 that becomes the upper surface when attached to main body 13 of tie 1, a back portion 115 that becomes the side that is attached to main body 13, a longitudinal side portion 113 that is parallel to the circumferential direction of main body 13, and a lateral side portion 114 that is parallel to the longitudinal direction of main body 13. The angle between flat portion 112 and longitudinal side portion 113 is approximately a right angle, and it is preferable that corner 116 between the two surfaces is angular and not rounded.

[0029] 7(b) is an enlarged view of a portion of the connecting material 1 to which the metal fittings 11a and 11b are attached. The metal fittings 11a and 11b are curved before being attached to the main body 13, and fit along the circumferential surface of the main body 13. It is preferable that the metal fittings be curved to match the outer diameter of the main body 13 (for example, φ42.7 mm), with a radius of curvature that is half the outer diameter of the main body (for example, R21.3 mm). The metal fittings 11a and 11b are made of iron, and after being welded to the main body 13 along the circumferential surface of the main body 13, they are spray-galvanized to prevent rust.

[0030] FIG. 8 is an explanatory diagram showing a state in which a hook portion is hung on a temporary scaffolding tie according to Example 1 of the present invention. The metal fitting 11 is attached to the main body 13 and constitutes a band-like portion that creates a step on the main body 13 that the hook portion 21 of the cloth plate 2 cannot overcome. The flat portion 112 of the metal fitting 11 is raised from the circumferential surface of the main body 13 by the thickness of the metal fitting. This prevents the hook portion 21 from sliding on the main body 13 and causing the cloth plate 2 to shift due to shock or vibration received by the cloth plate 2. The width, length, and thickness (height) of the metal fittings 11a and 11b do not need to be the same. Furthermore, since the metal fitting 11 has a corner 116, even if a strong force is applied to the cloth plate 2 due to severe vibration, the hook portion 221 can be prevented from sliding up the longitudinal side portion 113 of the metal fitting 11 and shifting to the flat portion 112. In addition, since the step is along the circumferential surface, when the hook portion 21 comes into contact with the metal fitting 11 due to vibration, the entire longitudinal side portion 113 of the metal fitting 11 comes into contact with the side of the hook portion 21, which provides a high degree of prevention against slippage and is highly effective as a stopper.

[0031] Therefore, the connecting material 1 of this embodiment to which the metal fittings 11 are attached can prevent the gap between the cloth plates 2 from widening due to the displacement of the cloth plates 2, thereby improving safety.

[0032] Because the metal fittings 11 do not protrude radially from the main body 13, they do not get in the way when transporting the ties, and there is no risk of injury when bumping into them during assembly or disassembly. They are easy to stack, making them easy to operate. Furthermore, their simple structure reduces costs. They can be manufactured by processing existing ties, eliminating the need to discard existing ties, making them environmentally friendly and preventing cost increases. Furthermore, rather than being separate parts like clips, the metal fittings 11 are fixed and integrated into the main body 13, eliminating the need to attach each ties individually on-site. This eliminates the risk of the metal fittings falling, improving workability. Therefore, the temporary scaffolding ties of this embodiment and the scaffolding material set for the wedge-tightened scaffolding of this embodiment prevent the sheet metal from shifting during assembly and disassembly without requiring extra time or effort, thereby improving safety.

[0033] FIG. 9 is a top view schematic diagram showing the state in which a hook portion is hung on a temporary scaffolding tie material according to Example 1 of the present invention. In this example, fittings 11a and 11b are arranged side by side and welded to the main body 13 with a predetermined spacing 14 provided. When assembling the scaffolding, the hook portion is hooked onto spacing 14. For safety reasons, the gap between the floor surface portions 22 of adjacent cloth boards 2 must be 30 mm or less. During assembly, the gap is set to 30 mm or less, but it is necessary to ensure that the gap does not exceed 30 mm even if there is vibration after assembly or if people walk on the floor surface portions. As shown in Figure 9, when cloth plates 2a and 2b are placed side by side on connecting material 1b and cloth plates 2c and 2d are placed side by side on the opposite side of cloth plates 2a and 2b, hook portion 21c of cloth plate 2c, hook portion 21a of cloth plate 2a, hook portion 21d of cloth plate 2d, and hook portion 21b of cloth plate 2b are placed side by side and hooked onto spacing portion 14 between metal fittings 11a and 11b. With this configuration, the gap L between adjacent cloth plates 2, with their end portions (hook portions 21) placed on main body 13, can be maintained within a certain range.

[0034] In this embodiment, the length of the separation portion 14 is 54 mm. This is just one example, and the length of the separation portion is preferably 40 mm or more and 60 mm or less. When the length of the separation portion is 40 mm or more, the four hook portions can be sufficiently hooked. When the length of the separation portion is 60 mm or less, the distance between the floor surface portion of cloth plate 2c and the floor surface portion of cloth plate 2d can be sufficiently prevented from exceeding 30 mm, and the distance between the floor surface portion of cloth plate 2a and the floor surface portion of cloth plate 2b can be sufficiently prevented from exceeding 30 mm.

[0035] Metal fitting 11a is welded so that the position of longitudinal side surface portion 113 of metal fitting 11a closer to metal fitting 11b, i.e., the starting position of separation portion 14, is located 5 to 57 mm from one end (metal fitting 11a side) of main body 13 of connecting material 1. This is one example, and it is preferable that the starting position of separation portion 14 is 555 mm to 610 mm from one end of the main body of the connecting material. Cloth boards incorporated into scaffolding are generally 500 mm wide and 240 mm or 250 mm wide, but when multiple cloth boards are used in combination, one 500 mm wide cloth board is used next to it, and either 500 mm wide cloth boards or 240 mm or 250 mm wide cloth boards are used side by side. For example, when arranging two 500mm-wide cloth boards, a 1219mm long connecting piece is selected, and when arranging one 500mm-wide cloth board and one 240mm-wide cloth board, a 914mm long connecting piece is selected. The metal fittings 11 are positioned between one 500mm-wide cloth board and the other cloth board to be combined with it. When the starting position of the spacing portion 14 is 555mm or more from one end of the body of the connecting piece, the 500mm-wide cloth board can be installed without the hook portion hitting the wedge portion. When the starting position of the spacing portion 14 is 610mm or less from one end of the body of the connecting piece, the combined cloth board can be installed without the hook portion hitting the wedge portion. The size of the connecting piece is not limited to 1219mm long, and other sizes may be used. For example, a 1800mm long connecting piece may be used to align two 500mm-wide cloth boards.

[0036] {effect} According to the present embodiment of the temporary scaffolding tie material and scaffolding material set for wedge-tightened scaffolding, it is possible to prevent the sheet metal from shifting during assembly and disassembly without requiring extra effort or time, thereby increasing safety.

[0037] Furthermore, the temporary scaffolding tie material of this embodiment is highly convenient in terms of cost, transportability, and operability while ensuring high safety.

[0038] The present invention is not limited to the above-described embodiments, and various modifications and variations are possible without departing from the spirit of the invention. Furthermore, the components of the above-described embodiments can be combined in any manner without departing from the spirit of the invention.

[0039] For example, the flat surface of the metal fitting 11 may be provided with grooves or patterns for preventing slipping. [Explanation of symbols]

[0040] 1. Tie material 11 Metal fittings 111 Welded parts 112 Plane section 113 Longitudinal side part 114 Short side side part 115 Back part 116 Corner 12 Wedge 13 Main Unit 14 Separation part 2 cloth board 21 Hook part 22 Floor section 3 pillars 31 flange L gap

Claims

1. A metal tubular temporary scaffolding tie that is connected to a support to be erected and used to fasten two or more cloth plates with hook portions side by side, A connecting material for temporary scaffolding, characterized in that a pair of curved rectangular plate-shaped metal fittings, arranged with a space between them, are fixed along the periphery of the main body at predetermined positions between the interlocking cloth plates.

2. 2. A temporary scaffolding joint according to claim 1, wherein the metal fittings are cloth plate restraining devices that restrain the sliding of the cloth plates and are welded along the periphery of the main body.

3. A temporary scaffolding connecting material as described in claim 1 or 2, characterized in that the metal fittings form a band-shaped portion on the main body that creates a step that the hook portion of the cloth plate cannot overcome, and maintains the gap between adjacent cloth plates with their ends placed on the main body within a certain range.

4. A temporary scaffolding connecting material as described in claim 1 or 2, characterized in that the thickness of the metal fittings is 2 mm or more and 19 mm or less, the length of the metal fittings in the circumferential direction of the main body is 1 / 6 to 1 / 2 of the outer circumference of the main body, the length of the metal fittings in the longitudinal direction of the main body is 6 mm or more and 30 mm or less, the length of the separated portion is 40 mm or more and 60 mm or less, and the specified position is 555 mm or more and 610 mm or less from one end of the main body.

5. A scaffolding material set for wedge-tightening scaffolding, comprising a plurality of temporary scaffolding ties according to claim 1 or 2, a plurality of posts, and a plurality of cloth plates each having a hook portion at its end.

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