Scaffolding extension method and connecting jig used in the method

Abstract

The base end of the extension horizontal pipe 5 is connected to the single-pipe structure 10A that constitutes the scaffolding, thereby further improving work safety and work efficiency when extending the scaffolding. [Solution] An operating tool 71 is provided with an engaging portion 712 at its tip, and an engaging device 72 that can engage with the engaging portion 712 is provided on the base end side of the extension horizontal pipe 5, and the extension horizontal pipe 5 is suspended so as to be swingable, A scaffolding extension method characterized by engaging the engaging portion 712 with the engaging device 72, moving the extension horizontal pipe 5 with the operating tool 71, and fitting and connecting its base end to the fitting body 6 provided on the scaffolding structure.

Description

Technical Field

[0001] The present invention relates to a scaffolding extension method for expanding a scaffolding starting from a scaffolding attached to a structure and a connecting jig used therefor.

Background Art

[0002] Conventionally, as a scaffolding attached to structures such as bridges, highways, and buildings, there is known one composed of a single-pipe structure formed in a three-dimensional lattice shape (jungle gym shape) by combining single pipes vertically and horizontally, and a plate member spanned between the horizontal single pipes constituting the single-pipe structure.

[0003] In recent years, a scaffolding extension method has been proposed that expands such a scaffolding attached to a structure one after another without support from the ground starting from the scaffolding.

[0004] For example, in the scaffolding extension methods disclosed in Patent Documents 1 to 3, a horizontal extension single pipe is horizontally attached to the horizontal single pipe of the starting scaffolding to expand the scaffolding. More specifically, the extension single pipe is suspended in a substantially horizontal state along the expansion direction by a wire, chain, etc. attached to the single-pipe structure or the structure, and after the suspended extension single pipe is pushed out and moved in the expansion direction, its base end is gripped by an operator and fitted and attached to the tip of the horizontal single pipe.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, in order to perform the aforementioned fitting work, workers must lean part of their body over the scaffolding, which carries the risk of falling. Although a fall would not be life-threatening because the workers are wearing safety harnesses, it does require extra effort to pull the workers up.

[0007] Therefore, in view of the above-mentioned problems, the present invention aims to further improve the safety and efficiency of work when expanding scaffolding. [Means for solving the problem]

[0008] In other words, the scaffolding expansion method according to the present invention is as follows:

[0009] [1] A scaffolding extension method for extending a scaffolding by connecting the base end of an extension horizontal pipe to a single-pipe structure that constitutes the scaffolding, An operating tool is provided with an engaging portion at its tip, and an engaging device that can engage with the engaging portion is provided on the base end side of the horizontal extension pipe. The aforementioned horizontal extension pipe is suspended so as to be swingable, The engaging portion is engaged with the engagementd device, A scaffolding extension method characterized by moving the extension horizontal pipe using the operating tool and fitting its base end to a fitting body provided on the scaffolding structure.

[0010] [2] The scaffolding extension method described in [1], wherein the extension horizontal pipe is suspended in a position substantially along the extension direction and its base end is located near the tip of the fitting body.

[0011] [3] This is a connecting jig used in a scaffolding extension method that extends the scaffolding by connecting the base end of a suspended horizontal extension pipe to a fitting body provided on a single-pipe structure that makes up the scaffolding. A long operating tool with an engaging part at its tip, Provided on the base end side of the horizontal single pipe for extension, an engaged member that engages with the engaging portion, A connecting jig, characterized by comprising the above.

[0012] [4] A ring body is formed on the engaged member, The connecting jig according to [3], wherein the engaging portion is formed by a pair of hook bodies facing in opposite directions.

Effect of the Invention

[0013] According to the present invention configured as described above, an operator can connect the horizontal single pipe for extension from above the scaffold using an operating tool without leaning out from the scaffold, so that the work safety and work efficiency when expanding the scaffold can be further improved.

Brief Description of the Drawings

[0014] [Figure 1] It is a side view with a part omitted showing the starting scaffold according to an embodiment of the present invention. [Figure 2] It is a plan view with a part omitted showing the starting scaffold of the same embodiment. [Figure 3] In the same embodiment, it is a side view for explaining the procedure of expanding the scaffold from the starting scaffold. [Figure 4] In the same embodiment, it is a side view for explaining the procedure of expanding the scaffold from the starting scaffold. [Figure 5] In the same embodiment, it is a side view for explaining the procedure of expanding the scaffold from the starting scaffold. [Figure 6] In the same embodiment, it is a side view for explaining the procedure of expanding the scaffold from the starting scaffold. [Figure 7] It is a perspective view showing the structure and usage of the jig in the same embodiment. [Figure 8] It is a perspective view showing the structure and usage of the jig in the same embodiment.

Modes for Carrying Out the Invention

[0015] An embodiment of the scaffolding extension method according to the present invention will be described below with reference to the drawings.

[0016] First, let's explain the starting scaffolding (hereinafter also referred to as "starting scaffolding 100").

[0017] As shown in Figures 1 and 2, this starting scaffolding 100 is composed of a single-pipe structure 10A formed in a three-dimensional grid (jungle gym-like) by combining vertical single pipes 101 and horizontal single pipes 102 vertically and horizontally, and a plurality of parallel rectangular plate members 10B stretched between opposing horizontal single pipes 102.

[0018] In this context, the single-pipe structure 10A is erected from a foundation surface such as the ground or floor, but it may also be suspended from beams H of structures such as bridges, highways, and buildings.

[0019] Next, we will explain how to extend the scaffolding from this starting scaffolding 100.

[0020] First, the extension horizontal pipe 5, which is placed on the starting scaffolding 100 in a position where its long length is approximately parallel to the extension direction, is suspended by suspension members such as wires or chains.

[0021] Let me explain in more detail. Here, as shown in Figure 3, two main suspension members 11 and one secondary suspension member 12 are used as suspension members.

[0022] The main suspension members 11 are hooked onto a fastening body 2 attached above the vertical pipe 101 located on the extension side of the starting scaffolding 100, and the ends of the two main suspension members 11 are hooked onto fastening members 5a provided at two locations on the extension horizontal pipe 5 which is placed on the plate member 10B of the starting scaffolding 100. The main suspension members 11 are designed to be adjustable in length by using turnbuckles in part of them, and by adjusting them, the extension horizontal pipe 5 can be suspended approximately horizontally.

[0023] On the other hand, a sliding body 3 is attached to the vertical pipe 101 below the latching body 2, and this sliding body 3 supports the linear support rod 4 so that it can slide along the expansion direction.

[0024] The aforementioned secondary suspension member 12 is suspended from the tip of the support rod 4, and the tip of the secondary suspension member 12 is hooked onto another hooking member 5a provided on the extension horizontal pipe 5.

[0025] From this state, the support rod 4 is extended in the extension direction (hereinafter also referred to as forward, and the opposite direction as towards the viewer). As a result, the extension horizontal pipe 5 is pulled by the support rod 4 via the auxiliary suspension member 12 and extended forward.

[0026] In this way, the worker feeds out the extension horizontal pipe 5 until it passes the edge of the plate member 10B, as shown in Figure 4. Here, a cylindrical or round pipe-shaped fitting body 6 is integrally formed at the front end of the horizontal pipe 102 that constitutes the starting scaffolding 100, and the worker feeds out the extension horizontal pipe 5 until, in a side view, the base end of the extension horizontal pipe 5 is located near the fitting body 6.

[0027] As a result, the horizontal extension pipe 5, although slightly tilted, is suspended in mid-air with its length roughly aligned with the extension direction, allowing it to swing.

[0028] From this state, the worker uses a predetermined connecting jig 7 to fit the base end of the suspended horizontal extension pipe 5 into the fitting body 6 and connect them.

[0029] Before explaining this procedure in detail, let's describe the connecting jig 7.

[0030] As shown in Figures 5 to 7, this connecting jig 7 consists of a long operating tool 71 that is grasped and operated by the worker, and an engaging tool 72 attached to the base end of the horizontal extension pipe 5.

[0031] The operating tool 71 comprises a gripping portion 711 that is shaped like a straight rod, and an engaging portion 712 attached to the tip of the gripping portion 711. The engaging portion 712 is equipped with a pair of hook bodies 712a and 712b that face in opposite directions.

[0032] The engaging device 72 comprises an annular outer fitting portion 721 that is fitted and fixed to the base end of the extension horizontal pipe 5, and a ring body 722 attached to this outer fitting portion 721. The hooks 712a and 712b of the operating device 71 are configured to hook onto this ring body 722.

[0033] As shown in Figures 5 and 7, the worker stands on the board member 10B of the starting scaffolding 100, grasps the gripping portion 711 of the operating tool 71, and hooks one of its hooks 712a onto the ring body 722 of the engaging device 72 attached to the base end of the extension horizontal pipe 5.

[0034] Then, the extension horizontal pipe 5 is slightly lifted and pulled towards the front, and its base end is fitted into the fitting body 6. As a result, as shown in Figures 6 and 8, the extension horizontal pipe 5 is connected to the starting scaffolding 100.

[0035] Following the same procedure, multiple extension horizontal pipes 5 are connected to the starting scaffolding 100. Then, although not shown in the diagram, a plate member 10B is placed between opposing extension horizontal pipes 5 to form a new scaffolding. In practice, however, work is also carried out to prevent the connected extension horizontal pipes 5 from coming loose again by bolting them in place, and to prevent them from becoming cantilevered, their ends are suspended from the beam H of the structure by vertical supports.

[0036] On the other hand, to remove the extension horizontal pipe 5, as shown in Figure 8, engage the other hook body 712b of the operating tool 71 with the ring body 722 and push.

[0037] However, with this configuration, workers can connect the extension horizontal pipes 5 from the starting scaffolding 100 using the operating tool 71 without leaning out from the scaffolding, thereby improving work safety and efficiency when extending the scaffolding.

[0038] However, the present invention is not limited to the embodiments described above.

[0039] The fitting body 6 was integrally formed at the tip of the horizontal pipe 102 of the starting scaffolding 100, but it may also be attached so as to extend horizontally from the side of the vertical pipe 101.

[0040] Furthermore, the method of suspending the extension horizontal pipe 5 is not limited to the above embodiment. For example, in the above embodiment, the extension horizontal pipe 5, which is suspended by the support rod 4, was configured to be in a position along the extension direction. However, since the extension horizontal pipe 5 can be moved by the connecting jig 7, the position of the extension horizontal pipe 5 in its suspended state is hardly a problem, and the support rod 4 and sliding body 3 for maintaining the position can be made unnecessary.

[0041] The form of the operating tool 71 and the engaged tool 72 is not limited to the above embodiment. For example, the engaging portion 712 at the tip of the operating tool 71 may be made ring-shaped, and the engaged tool 72 may be made hook-shaped. Also, the engaged tool 72 may be removable from the extension horizontal pipe 5, or it may be fixed in place beforehand by welding or the like.

[0042] Furthermore, the present invention can be modified in various ways without departing from its spirit. [Explanation of Symbols]

[0043] 100... Starting point scaffolding 10A... Single-pipe structure 5. Horizontal pipe for extension 6. Fittings 7. Connecting jig 71... Operating tool 712...Engaging part 712a, 712b... hook body 72...Engaged tool 722... Ring body

Claims

1. A scaffolding extension method for extending a scaffolding by connecting the base end of an extension horizontal pipe to a single-pipe structure that constitutes the scaffolding, An operating tool is provided with an engaging portion at its tip, and an engaging device that can engage with the engaging portion is provided on the base end side of the horizontal extension pipe. The aforementioned horizontal extension pipe is suspended so as to be swingable, The engaging portion is engaged with the engagementd device, A scaffolding extension method characterized by moving the extension horizontal pipe using the operating tool and fitting its base end to a fitting body provided on the scaffolding structure.

2. The scaffolding extension method according to claim 1, wherein the horizontal extension pipe is suspended in a position substantially along the extension direction and its base end is located near the tip of the fitting body.

3. This is a connecting jig used in a scaffolding extension method that extends the scaffolding by connecting the base end of a suspended horizontal extension pipe to a fitting body provided on a single-pipe structure that makes up the scaffolding. A long operating tool with an engaging part at its tip, A connecting jig characterized by comprising an engaging member provided on the base end side of the extension horizontal pipe and engaging with the engagement portion.

4. The engagement device has a ring body formed on it. The connecting jig according to claim 3, wherein the engaging portion is formed by a pair of hooks facing in opposite directions.

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