Temporary roofing device

Abstract

To provide a temporary roof device that can simplify installation work and removal work.SOLUTION: A temporary roof device 20 is installed at an upper end part of a cylindrical structure 10. The temporary roof device 20 comprises: an annular roof body 21 which is arranged to cover an opening part of a cylindrical body 11 positioned at an upper end from above and which has a penetration part 22; an opening / closing door 25 which is mounted on a top surface part 21a of the roof body 21 so as to open / close the penetration part 22; a lifting jig 27 that is provided on the top surface part 21a of the roof body 21; and a mooring mechanism for mooring the roof body 21 to an inner peripheral part of the cylindrical body 11.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a temporary roof device installed at the top of a cylindrical structure.

Background Art

[0002] During the construction of a cylindrical structure composed of a plurality of cylinders, such as the tower part of a wind turbine, as one of the purposes of preventing rainwater from entering the inside of the cylinder, a temporary roof that covers the opening of the cylinder located at the upper end is installed. Conventionally, as a temporary roof, there is an assembled type using a steel plate, and in addition, a temporary roof using a balloon as described in Patent Document 1.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The above-described assembled temporary roof and the temporary roof described in Patent Document 1 have complicated installation work and removal work. Therefore, there has been a demand for a temporary roof with simple installation work and removal work.

Means for Solving the Problems

[0005] The temporary roof device for solving the above problems is installed at the upper end of the cylindrical structure. The temporary roof device has a size that covers the opening of the cylinder located at the upper end from above, and includes an annular roof body having a through portion, an opening / closing door attached to the upper surface portion of the roof body for opening and closing the through portion, a lifting jig provided on the upper surface portion of the roof body, and a mooring mechanism for mooring the roof body to the inner peripheral portion of the upper end portion.

Effects of the Invention

[0006] According to the present invention, the installation and removal of temporary roofs can be simplified. [Brief explanation of the drawing]

[0007] [Figure 1] This diagram schematically shows the installation state of one embodiment of a temporary roofing device. [Figure 2] This is a perspective view showing the general configuration of the temporary roofing system. [Figure 3] This is a top view showing an example of the position of the mooring mechanism that secures the roof body to the cylindrical structure. [Figure 4] This diagram shows the schematic configuration of the mooring mechanism. [Figure 5] This flowchart shows an example of how to install a temporary roofing device. [Figure 6] This diagram schematically shows the state in which the roof-side sling is connected to the lifting sling at ground level. [Figure 7] This diagram schematically illustrates how work is performed using the penetration point. [Figure 8] This is a schematic perspective view showing the installation status of the temporary roofing device. [Figure 9] This flowchart shows an example of how to remove a temporary roofing device. [Figure 10] This flowchart shows an example of a construction method for cylindrical structures. [Modes for carrying out the invention]

[0008] An embodiment of the temporary roofing device will be described with reference to Figures 1 to 10. As shown in Figure 1, the temporary roof device 20 is installed at the upper end of the cylindrical structure 10 under construction to prevent rainwater from entering the internal space of the cylindrical structure 10. The cylindrical structure 10 is composed of a plurality of cylindrical bodies 11 connected vertically. The temporary roof device 20 includes a roof body 21. The roof body 21 is positioned to cover the upper opening portion of the cylindrical body 11 located at the upper end of the cylindrical structure 10 from above.

[0009] As shown in Figure 2, the roof body 21 is formed in an annular shape with a through-hole 22 in the center. The through-hole 22 is sized to allow workers to pass through comfortably, for example, it is formed in a circular cross-section with a diameter of about 1 m. The upper end opening 23 of the through-hole 22 is formed by a raised portion that is raised above the surrounding area. In the following, the direction around the through-hole 22 in a top view of the roof body 21 will be referred to as the circumferential direction.

[0010] The roof body 21 is air-filled. The roof body 21 has a contracted state when the air is released and an expanded state when air is injected. Figures 1 and 2 show the roof body 21 in the expanded state. The roof body 21 can be folded in the contracted state, allowing for compact transportation between sites.

[0011] The temporary roof device 20 is equipped with an opening / closing door 25. The opening / closing door 25 is attached to the upper surface 21a of the roof body 21. The opening / closing door 25 is a door that opens and closes the upper end opening 23 of the penetration 22. The opening / closing door 25 is configured to be lockable and unlockable from the inside of the penetration 22. The opening / closing door 25 is formed in a shape that covers the entire upper end opening 23 of the penetration 22 from above. Closing the opening / closing door 25 makes it difficult for rainwater to enter the internal space of the cylindrical body 11 from the penetration 22.

[0012] The temporary roof device 20 is equipped with lifting jigs 27. The lifting jigs 27 are provided on the upper surface 21a of the roof body 21. More specifically, the lifting jigs 27 are provided at equal intervals in the circumferential direction of the roof body 21, near the outer periphery of the roof body 21. At least three lifting jigs 27 are provided. In this embodiment, four lifting jigs 27 are provided. The base end of the roof-side sling 28 of the lifting jig 27 is configured to be detachable.

[0013] The temporary roof device 20 includes a temporary fixing jig 30. The temporary fixing jig 30 is provided on the upper surface portion 21a of the roof body 21. More specifically, the temporary fixing jig 30 is provided at a position between the through portion 22 and each lifting jig 27 so as to surround the upper end opening portion 23 of the through portion 22. The temporary fixing jig 30 is provided at a position where the hand of an operator who has leaned out the upper body from the through portion 22 can reach. The tip of the roof side sling 28 of the temporary fixing jig 30 is configured to be detachable. When the roof body 21 is in the installed state, the tip of the roof side sling 28 is attached to the temporary fixing jig 30. The tip of the roof side sling 28 is removed from the temporary fixing jig 30 when the roof body 21 is lifted, etc. Note that it is preferable that carabiners or the like are provided at both ends of the roof side sling 28 so as to be securely connected to each of the jigs 27 and 30 and to facilitate attachment and detachment.

[0014] As shown in FIG. 3, the temporary roof device 20 includes a mooring mechanism 35. The mooring mechanism 35 is provided at equal intervals in the circumferential direction of the roof body 21. The mooring mechanism 35 moors the roof body 21 disposed at the upper end portion of the cylindrical body 11. At the inner peripheral portion of the upper end of the cylindrical body 11, a connecting flange 12 used for connection to the cylindrical body 11 disposed in the upper stage is provided. In the connecting flange 12, fastening holes 13 penetrating in the vertical direction are formed at predetermined intervals in the circumferential direction of the cylindrical body 11. The mooring mechanism 35 moors the roof body 21 using the fastening holes 13.

[0015] As shown in FIG. 4, the mooring mechanism 35 includes a mooring jig 36, a fastening member 37, a mooring auxiliary member 38, and a wire 39. The mooring jig 36 is provided on the lower surface portion 21b of the roof body 21. More specifically, the mooring jig 36 is provided at a position closer to the outer peripheral portion of the roof body 21 and at a position where it can be disposed inside all of the cylindrical bodies 11 constituting the cylindrical structure 10 in a top view.

[0016] The fastening member 37 has a bolt 40 and a nut 41. The bolt 40 has a shaft portion that penetrates the fastening hole 13 and a head portion that is locked to the upper surface 12a of the connecting flange 12. The head portion of the bolt 40 abuts against the lower surface portion 21b of the roof body 21. The nut 41 is fastened to the shaft portion of the bolt 40 from below the connecting flange 12.

[0017] The mooring auxiliary member 38 is fastened to the lower surface of the connecting flange 12 by the fastening member 37. The mooring auxiliary member 38 is, for example, a plate material. The mooring auxiliary member 38 is disposed so as to extend toward the mooring jig 36 in a top view. The base end of the wire 39 is attached to the tip end portion of the mooring auxiliary member 38. The tip end of the wire 39 is attached to the mooring jig 36 of the roof body 21. A ratchet or the like for adjusting the tension may be provided on the wire 39.

[0018] In the temporary roof device 20 having such a configuration, the roof body 21 and the mooring mechanism 35 are carried into the construction site as separate bodies. At this time, the roof body 21 is carried in a contracted state. The roof body 21 may be carried in a folded state. Further, a roof-side sling 28 may be attached to the roof body 21. The mooring mechanism 35 is carried into the construction site in a disassembled state.

[0019] (Installation method) An example of the installation method of the temporary roof device 20 at the construction site will be described. As shown in FIG. 5, the installation method of the temporary roof device 20 includes a preparation step (step S101), a lifting step (step S102), a mooring step (step S103), and a temporary fixing step (step S104).

[0020] In the preparation step (step S101), air is injected to inflate the roof body 21. The roof-side slings 28 may be attached after inflation. Also, a scaffolding is installed inside the cylindrical body 11 located at the upper end of the cylindrical structure 10 for connecting the cylindrical bodies 11 together. Preparation work for the mooring mechanism 35 is carried out using this scaffolding. Specifically, a mooring auxiliary member 38 with a wire 39 attached is fastened to the connecting flange 12 of the cylindrical body 11 located at the upper end of the cylindrical structure 10 using a fastening member 37.

[0021] As shown in Figure 6, in the lifting process (step S102), a rigging operation is performed in which the ends of each roof-side sling 28 are connected to the lifting sling 45. Then, the roof body 21 is lifted using a crane or the like to raise it to the upper end of the cylindrical structure 10. The roof body 21 is then positioned so as to cover the upper opening of the cylindrical body 11 and so as to contact the heads of each bolt 40 constituting the mooring mechanism 35 from above. In this way, the roof body 21 is supported from below by the fastening members 37, specifically the heads of the bolts 40.

[0022] In the mooring process (step S103), the end of the wire 39 is connected to the mooring jig 36, and then the tension of the wire 39 is adjusted. As a result, the roof body 21 is moored to the cylindrical body 11 while covering the upper opening portion of the cylindrical body 11.

[0023] As shown in Figure 7, in the temporary fastening process (step S104), worker 50 opens the opening / closing door 25 of the roof body 21. Then, worker 50 leans out from the penetration 22 and connects the end of the roof-side sling 28 to the temporary fastening jig 30.

[0024] Then, as shown in Figure 8, after performing the lifting operation to detach the roof-side sling 28 from the lifting sling 45, the opening and closing door 25 is closed and locked. In this way, the temporary roof device 20 is installed on the upper end of the cylindrical structure 10 under construction.

[0025] (Removal method) An example of a method for removing the temporary roofing device 20 will be described. The removal method for the temporary roof device 20 consists of a sling connection step (step S201), a mooring release step (step S202), a lowering step (step S203), and a mooring mechanism dismantling step (step S104). In the sling connection process (step S201), worker 50 opens the opening / closing door 25 of the roof body 21. Then, worker 50 leans his upper body out from the penetration 22, removes the end of the roof-side sling 28 from the temporary fastening jig 30, and connects the end of the roof-side sling 28 to the end of the lifting sling 45. After that, worker 50 closes and locks the opening / closing door 25.

[0026] In the mooring release process (step S202), the connection of the end of the wire 39 to the mooring jig 36 is released. This makes the roof body 21 ready for lifting. In the lowering process (step S203), the roof body 21 is lowered to the ground using a crane or the like, and then the end of the roof-side sling 28 is removed from the lifting sling 45. The removed end of the roof-side sling 28 may be connected to the temporary fastening jig 30.

[0027] In the mooring mechanism dismantling process (step S204), the fastening member 37 is released, and the mooring auxiliary member 38 and the fastening member 37 are removed from the connecting flange 12 of the cylindrical body 11. This dismantles the mooring mechanism 35.

[0028] Once the temporary roof device 20 is removed in this manner, the connection work for the upper cylindrical body 11 is carried out. The mooring support member 38 and the fastening member 37 may be moved to the ground level, or they may be moved to the scaffolding installed on the upper cylindrical body 11 after the upper cylindrical body 11 has been installed.

[0029] (Construction method for cylindrical structures) As shown in Figure 10, in the construction method of the cylindrical structure 10 using the temporary roof device 20 described above, a cylindrical body 11 is installed (step S301). Next, the temporary roof device 20 is installed using the installation method described above, based on the progress of the construction at that time (step S302). Then, after the temporary roof device 20 is removed using the removal method described above (step S303), a new cylindrical body 11 is installed on the upper side of the upper end of the cylindrical body 11 (step S301). The cylindrical structure 10 is constructed by repeatedly installing the cylindrical body 11 and installing and removing the temporary roof device 20.

[0030] (action) The temporary roof device 20 is installed on the upper end of the cylindrical structure 10 as construction progresses, thereby preventing rainwater from entering the internal space of the cylindrical structure 10. Construction of the cylindrical structure 10 will resume after the temporary roof device 20 is removed.

[0031] The effects of this embodiment will now be explained. (1) With the temporary roof device 20, the upper opening of the cylindrical structure 10 can be covered simply by placing the roof body 21 on the upper end of the cylindrical structure 10 and then securing it to the cylindrical body 11 with the mooring mechanism 35. Furthermore, since lifting work can be performed using the penetration 22, there is no need to install scaffolding or anything like that in the area outside the cylindrical body 11. As a result, installation and removal work can be simplified.

[0032] (2) The roof body 21 is secured to the connecting flange 12 of the cylindrical body 11 by the mooring mechanism 35. This eliminates the need to install a jig on the cylindrical body 11 to fix the roof body 21, thus simplifying the configuration of the temporary roof device 20 itself.

[0033] (3) The base end of the wire 39 is attached to the connecting flange 12 via the tethering auxiliary member 38. This makes it easy to connect the connecting flange 12 and the wire 39. In addition, the length of the wire 39 can be shortened, which improves the handling of the wire 39.

[0034] (4) The mooring jig 36 is positioned so that it can be placed inside all the cylindrical bodies 11 that make up the cylindrical structure 10. This eliminates the need to replace the roof body 21 during the construction of the cylindrical structure 10.

[0035] (5) Because the roof body 21 is air-filled, the roof body 21, and by extension the temporary roofing device 20, can be transported in a compact manner. In addition, the weight of the roof body 21 can be reduced.

[0036] (6) In the temporary roof device 20, the roof body 21 is inflated at ground level. This eliminates the need to install, for example, a compressor or air supply pipe at the upper end of the cylindrical structure 10. As a result, the installation work of the roof body 21 can be further simplified.

[0037] (7) A gap equal to the size of the bolt head 40 is formed between the roof body 21 and the cylindrical body 11. This allows for ventilation of the internal space of the cylindrical structure 10 through the gap. As a result, even when work is performed inside the cylindrical body 11 with the temporary roof device 20 installed, the burden on the workers can be reduced.

[0038] (8) The ratchet attached to the wire 39 allows for easy adjustment of the tension of the wire 39. (9) The opening and closing door 25 is configured to be lockable, so that the opening and closing door 25 can be prevented from opening due to strong winds or the like after the roof body 21 has been installed.

[0039] This embodiment can be implemented with the following modifications. This embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically. In the above embodiment, the roof body 21 is of the air-inflatable type. However, the roof body 21 is not limited to this, and can be lifted from the ground and placed on the upper end of the cylindrical structure 10, and may be made of, for example, a thin steel plate.

[0040] The roof body 21 may be replaced according to the size of the cylindrical body 11 located at the upper end. Even with this configuration, only the roof body 21 needs to be replaced, so the installation and removal work will not become complicated.

[0041] The mooring mechanism 35 may be configured such that the wire 39 is fastened to the connecting flange 12 by a fastening member 37, or the nut 41 may be provided with a portion to which the base end of the wire 39 can be connected.

[0042] The technical concepts that can be understood from the above embodiments and modified examples are described below. (Note 1) The aforementioned mooring jig is positioned so that, when viewed from above, it can be placed inside all the cylindrical bodies constituting the cylindrical structure. This eliminates the need to replace the roof body during the construction of the cylindrical structure.

[0043] (Note 2) The roof structure is air-filled. This allows for compact transportation of the roof structure, and consequently the temporary roofing system. It also allows for a reduction in the weight of the roof structure.

[0044] (Note 3) The fastening member comprises a bolt having a head that engages with the upper surface of the connecting flange and supports the roof body from below, and a nut that fastens to the shaft of the bolt from the lower side of the connecting flange.

[0045] With this configuration, a gap equal to the size of the bolt head is formed between the connecting flange and the roof body, allowing ventilation of the cylindrical structure through this gap. [Explanation of Symbols]

[0046] 10...Cylindrical structure, 11...Cylindrical body, 12...Connecting flange, 12a...Top surface, 13...Fastening hole, 20...Temporary roof device, 21...Roof body, 21a...Top surface, 21b...Bottom surface, 22...Penetration part, 23...Upper end opening, 25...Opening / closing door, 27...Lifting jig, 28...Roof-side sling, 30...Temporary fastening jig, 35...Mooring mechanism, 36...Mooring jig, 37...Fastening member, 38...Mooring auxiliary member, 39...Wire, 40...Bolt, 41...Nut, 45...Lifting sling, 50...Worker.

Claims

1. A temporary roof device installed at the upper end of a cylindrical structure, The roof body has an annular shape that is large enough to cover the opening at the upper end from above and has a through portion, An opening / closing door is attached to the upper surface of the roof body and opens and closes the penetration, A lifting jig provided on the upper surface of the roof body, The roof body is equipped with a mooring mechanism for securing it to the inner circumference of the upper end. Temporary roofing device.

2. The aforementioned cylindrical structure is composed of multiple cylindrical bodies, The cylindrical body has a connecting flange on its upper inner circumference, which is used to connect with the cylindrical body positioned above it. The aforementioned mooring mechanism is, A mooring jig provided on the underside of the roof body, A fastening member fastened to the connecting flange and supporting the roof body from below, A tethering auxiliary member connected to the connecting flange by the fastening member, A wire connecting the aforementioned mooring auxiliary member and the aforementioned mooring jig, The temporary roofing device according to claim 1.

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