Safety belt attachment device, building, and installation method for safety belt attachment device

Abstract

To provide a safety belt fixture capable of being easily fitted to an existing roof, and also to provide an architectural structure and a construction method of the safety belt fixture.SOLUTION: A safety belt fixture 40 comprises: an upper metal fitting 50 that is fitted to a roof 20 and allows a safety belt to be engaged therewith; and a lower metal fitting 60 that is linked to the upper metal fitting 50 and fitted to a horizontal member 24 of the roof 20. The lower metal fitting 60 has a belt like component 70 to be wound around the horizontal member 24, and a binding component 80. The binding component 80 binds a first part 71 of the belt like component 70 and a second part 72 different from the first part 71.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a safety belt attachment device, a building, and a method for installing the safety belt attachment device. [Background technology]

[0002] On the roof of a building, a safety belt fastening device is provided to which the worker's safety belt is attached to ensure the safety of the worker working on the roof of the building. From the viewpoint of worker safety, the safety belt fastening device is required to have sufficient strength. Patent Document 1 discloses a safety belt fastening device that is fixed to a cross member (called a ridge beam in the document). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-342599 Summary of the Invention [Problem to be solved by the invention]

[0004] However, there are some buildings that do not have safety harness attachments installed on their roofs. In such buildings, when working on a roof that does not have safety harness attachments installed during renovations or other such work, it is necessary to retrofit safety harness attachments to the roof before starting work on the roof. In retrofitting safety harness attachments, after dismantling parts of the roof, such as roofing materials and sheathing boards, the safety harness attachments are fastened to the cross members, which are structural members of the roof. After the safety harness attachments have been fastened to the cross members, the demolished part of the roof is restored.

[0005] With the conventional safety belt fastening structure, workers must enter the attic of a building and fasten the safety belt fastening to the cross member from there. In this case, it is necessary to dismantle part of the roof truss in order for the worker to enter the attic. As such, with the conventional safety belt fastening structure, it is not easy to install a safety belt fastening on an existing roof when retrofitting the safety belt fastening. [Means for solving the problem]

[0006] (1) A safety belt attachment device that solves the above problem is a safety belt attachment device for attaching a safety belt to a roof, and comprises an upper fitting that is attached to the roof and with which the safety belt engages, and a lower fitting that is connected to the upper fitting and attached to a cross member of the roof, and the lower fitting has a strip-shaped part that is wrapped around the cross member and a binding part that binds together a first part of the strip-shaped part and a second part that is different from the first part.

[0007] With this configuration, the safety belt attachment device is connected to the cross member by wrapping the belt-like part around the cross member. A worker wraps the belt-like part around the cross member from above the roof. The amount of roof that needs to be dismantled to wrap the belt-like part around the cross member inside the roof is small, as long as the belt-like part can pass through the dismantled part. When retrofitting the safety belt attachment device to the roof, the amount of roof that needs to be dismantled around the cross member can be small, making the safety belt attachment device easy to retrofit to the roof.

[0008] (2) In the safety belt mounting device described in (1) above, the upper metal fitting is provided with a first through hole through which the belt-shaped part is inserted, and the belt-shaped part has a winding part that is wound around the cross member when the belt-shaped part is inserted through the first through hole.

[0009] According to this configuration, the safety belt attachment can be connected to the cross member by wrapping the belt-shaped part around the cross member, so that the safety belt attachment can be easily attached to the roof later.

[0010] (3) In the safety belt attachment device described in (2) above, the fastening part fastens the first part and the second part of the belt-shaped part, so that at least a part of the belt-shaped part is formed into a ring shape, a part of the ring-shaped part of the belt-shaped part is inserted through the first through-hole, and a part of the upper metal fitting surrounding the first through-hole is inserted through the ring-shaped part of the belt-shaped part.

[0011] According to this configuration, a part of the ring-shaped portion of the band-shaped part is inserted through the first through hole, and a part of the upper fitting surrounding the first through hole is inserted through the ring-shaped portion of the band-shaped part. Therefore, the binding part binds the first and second portions of the band-shaped part together, thereby connecting the band-shaped part to the upper fitting.

[0012] (4) In the safety belt attachment device described in any one of (1) to (3) above, the belt-shaped part is a chain connecting a plurality of ring parts, and the binding part is a shackle, and the shackle binds the first ring part and the second ring part by inserting the penetration part of the shackle through the first ring part located in the first portion of the plurality of ring parts and the second ring part located in the second portion of the plurality of ring parts.

[0013] According to this configuration, the first and second portions of the belt-shaped part can be easily fastened together by the shackle.

[0014] (5) In the safety belt mounting device described in any one of (1) to (4) above, the upper fitting has a fixing part that is fixed to the roof, and the fixing part is provided with a second through hole through which a fixing member that fixes the upper fitting to the roof is inserted.

[0015] According to this configuration, the upper fitting is connected to the cross member by the lower fitting and is further fixed to the roof by the fixing member, which can prevent the upper fitting from moving on the roof.

[0016] (6) A building that solves the above problem is a building that has the above-mentioned roof, and the roof has a cross member, a sheathing board placed on the cross member, a roof material placed on the sheathing board, and a safety belt mounting device described in any one of (1) to (5) above.

[0017] According to this configuration, the safety belt attachment device can be easily attached to the roof afterwards, which makes it possible to carry out work on the roof of a building in an appropriate manner.

[0018] (7) In the building described in (6) above, the roof has a first roof section that slopes in one direction relative to the ridge of the roof, and a second roof section that slopes in the other direction relative to the ridge, the first roof section has a first cross member arranged near the ridge, the second roof section has a second cross member arranged near the ridge, and the belt-shaped part of the safety belt attachment device is wrapped around either the first cross member or the second cross member.

[0019] According to this configuration, in a roof such as a gable roof, the belt-shaped part is wound around either the first cross member or the second cross member. Therefore, when retrofitting the safety belt attachment device to the roof, the safety belt attachment device can be attached by simply dismantling either the first roof section or the second roof section. Therefore, the work of dismantling and restoring the roof can be reduced compared to when both the first roof section and the second roof section need to be dismantled and restored.

[0020] (8) A method for installing a safety belt attachment that solves the above-mentioned problems is a method for installing a safety belt attachment for hanging a safety belt on a roof, wherein the roof comprises a cross member, a sheathing board placed on the cross member, and a roof material placed on the sheathing board, and the safety belt attachment is attached to the roof and comprises an upper metal fitting with which the safety belt engages, and a lower metal fitting connected to the upper metal fitting and attached to the cross member, and the lower metal fitting has a belt-shaped part that is wound around the cross member, and the safety belt attachment is attached to the roof. The method includes a dismantling process in which the sheathing boards and roof material around the mounting portion where the band mounting fixture is attached are dismantled to expose the cross member from the roof; a winding process in which the band-shaped part of the lower fitting is wrapped around the cross member from above the roof; a connecting process in which the upper fitting is connected to the lower fitting by joining the upper fitting to the band-shaped part; a fixing process in which the upper fitting is fixed to the roof; and a restoration process in which the sheathing boards and roof material around the mounting portion that were dismantled in the dismantling process are restored.

[0021] With this configuration, the lower bracket can be attached to the cross member by wrapping the belt-shaped part around the cross member from above the roof, eliminating the need for workers to enter the roof attic. This reduces the area of ​​the roof that needs to be dismantled during the demolition process. Because the amount of work required for dismantling and restoration is reduced, safety harness attachment devices can be easily retrofitted to the roof. [Effects of the Invention]

[0022] According to the safety belt attachment device, building, and safety belt attachment device installation method of the present disclosure, the safety belt attachment device can be easily retrofitted to a roof. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a schematic diagram of a building according to an embodiment. [Figure 2] FIG. 2 is a perspective view of the roof of FIG. 1. [Figure 3] FIG. 2 is a cross-sectional view of the roof of FIG. 1 near the ridge. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] 10A and 10B are diagrams showing a part of a dismantling process in the installation method of a safety belt attachment device. [Figure 8] 10A and 10B are diagrams showing a part of a winding process in a method of installing a safety belt attachment device. [Figure 9] 10A and 10B are diagrams showing a part of a connecting step in a method of installing a safety belt attachment device. DETAILED DESCRIPTION OF THE INVENTION

[0024] <Embodiment> 1 to 9, a building 10, a safety belt attachment device 40, and a method for installing the safety belt attachment device 40 according to this embodiment will be described.

[0025] <Buildings> As shown in FIG. 1, an example of a building 10 is a residential house. The building 10 has a roof 20. The roof 20 is disposed on an interior space surrounded by exterior walls 11. While FIG. 1 illustrates the roof 20 as a gable roof, the roof 20 may also be a hip roof. The ridge 21 of the roof 20 is configured as a ventilation ridge that allows ventilation between the attic and the outdoors. The roof 20 has a first roof portion 22 that extends at an angle from the ridge 21 of the roof 20, and a second roof portion 23 that extends at an angle from the ridge 21 in the opposite direction to the first roof portion 22. In a plan view of the roof 20, the first roof portion 22 and the second roof portion 23 slope toward the ground as they move away from the ridge 21 along a second direction D2 that is perpendicular to the first direction D1 in which the ridge 21 extends.

[0026] 2 and 3, roof 20 includes cross members 24, sheathing boards 25 placed on cross members 24, roofing materials 26 placed on sheathing boards 25, and safety belt attachment devices 40. Roof 20 may further include roofing materials 27 placed on roofing materials 26. In FIG. 2, roofing materials 27, ridge wrap 32, flashing 33, and waterproofing members 34 are omitted from roof 20.

[0027] The cross members 24 are part of the structural materials that support the building 10. In addition to the cross members 24, the structural materials of the building 10 include elements such as columns, girders, foundations, and bases. The cross members 24 are horizontal beams. In this embodiment, the cross members 24 are part of the truss structure of the building 10. Of the multiple cross members 24, the first cross member 36 and the second cross member 37, which are closest to the ridge 21, are ridge beams of the roof 20. The cross members 24 are made of wood. The cross members 24 are placed on the slope beams 28 via first metal fittings 29A. The slope beams 28 are, for example, H-shaped steel. The cross members 24 are fixed to the first metal fittings 29A, which are fixed to the slope beams 28, by fastening members 30. The first metal fittings 29A are made of L-shaped angles. The fastening members 30 are, for example, bolts. The cross members 24 are arranged so that the lower surfaces 24B of the cross members 24 are aligned with the upper surfaces 28T of the gradient beams 28. The multiple gradient beams 28 are arranged at intervals in the first direction D1. A base material 31 is arranged on top of the roof material 26 via second metal fittings 29B. The second metal fittings 29B are arranged from the first roof portion 22 to the second roof portion 23. The multiple second metal fittings 29B are arranged at intervals in the first direction D1.

[0028] As shown in FIG. 3, a ridge envelope 32 is placed over the ridge portion 21. The ridge envelope 32 is positioned to close the opening between the first roof portion 22 and the second roof portion 23 of the ridge portion 21. The opening between the first roof portion 22 and the second roof portion 23 connects the attic of the building 10 to the outdoors of the building 10. A waterproofing member 33 and a waterproofing member 34 are placed on the roof 20. The waterproofing member 33 is positioned to extend from above the base material 31 to above the roofing material 27. The space between the waterproofing member 33 and the roofing material 27 is blocked by a waterproofing member 35. The waterproofing member 34 is, for example, a waterproof sheet. The waterproofing member 34 is placed between the sheathing boards 25 and the roofing material 26, on the top surface of the roofing material 26, and on the side of the base material 31.

[0029] The cross members 24 include a first cross member 36 arranged near the ridge 21 and a second cross member 37 arranged near the ridge 21. The first roof portion 22 has the first cross member 36. The second roof portion 23 has the second cross member 37.

[0030] <Safety belt attachment device> The safety belt attachment device 40 is used to attach a safety belt to the roof 20. The safety belt attachment device 40 comprises an upper fitting 50 with which the safety belt engages, and a lower fitting 60 attached to the cross member 24. The upper fitting 50 is attached to the roof 20. The lower fitting 60 is connected to the upper fitting 50. In the example of FIG. 3, the safety belt attachment device 40 is attached to the first cross member 36.

[0031] <Upper bracket> As shown in Figures 3 to 5, the upper fitting 50 is placed on the base material 31. The upper fitting 50 has a safety belt attachment portion 51 to which a safety belt is attached, and an upper connecting portion 52 that connects to the lower fitting 60. The safety belt attachment portion 51 is provided with an attachment hole 53 for hanging a hook of the safety belt. The upper fitting 50 is provided with a first through hole 54 through which the belt-shaped part 70 of the lower fitting 60 is inserted. The first through hole 54 is provided in the upper connecting portion 52. The upper connecting portion 52 is connected to the lower fitting 60 by inserting the belt-shaped part 70 of the lower fitting 60 through the first through hole 54.

[0032] The upper fitting 50 has a fixing portion 55 that is fixed to the roof 20. The fixing portion 55 is provided with a second through hole 56 through which a fixing member 57 that fixes the upper fitting 50 to the roof 20 is inserted. The fixing member 57 is, for example, a screw. The fixing member 57 is fixed to the base material 31 while inserted through the second through hole 56.

[0033] <Lower bracket> As shown in FIG. 3 , the lower metal fitting 60 includes a strip-shaped component 70 wound around the cross member 24 and a binding component 80. The binding component 80 binds a first portion 71 of the strip-shaped component 70 to a second portion 72 different from the first portion 71. The first portion 71 is located in a first region in the direction in which the strip-shaped component 70 extends when the strip-shaped component 70 is stretched. The second portion 72 is located in a second region different from the first region in the direction in which the strip-shaped component 70 extends when the strip-shaped component 70 is stretched. Either the first portion 71 or the second portion 72 may include one end of the strip-shaped component 70, and the other of the first portion 71 or the second portion 72 may include the other end of the strip-shaped component 70. The first portion 71 and the second portion 72 come into contact with each other when bound by the binding component 80.

[0034] The binding part 80 binds the first part 71 and the second part 72 of the strip-shaped part 70, thereby forming at least a portion of the strip-shaped part 70 into a loop shape. The strip-shaped part 70 is wound around either the first cross member 36 or the second cross member 37. Either the first cross member 36 or the second cross member 37 is then inserted into the loop of the strip-shaped part 70. In this embodiment, the loop-shaped portion of the strip-shaped part 70 is wound around the first cross member 36. Then, the first cross member 36 is inserted into the loop of the strip-shaped part 70.

[0035] A part of the ring-shaped portion of the band-shaped part 70 is inserted through the first through-hole 54. A part of the surrounding portion of the first through-hole 54 of the upper fitting 50 is inserted through the ring-shaped portion of the band-shaped part 70. For example, a part of the surrounding portion of the upper joining part 52 surrounding the first through-hole 54 is inserted through the ring-shaped portion of the band-shaped part 70. This prevents the band-shaped part 70 from coming off the upper fitting 50. In the example of FIG. 3 , the binding part 80 is positioned above the upper fitting 50, but the binding part 80 may also be positioned below the upper fitting 50.

[0036] The belt-shaped part 70 is a chain 70A made up of a plurality of connected annular parts 73. Each of the plurality of annular parts 73 is made of, for example, metal. The plurality of annular parts 73 includes a first annular part 74 and a second annular part 75. The first annular part 74 is located in a first portion 71 of the plurality of annular parts 73. The second annular part 75 is located in a second portion 72 of the plurality of annular parts 73.

[0037] As shown in FIG. 6 , the binding component 80 is a shackle 80A. In FIG. 6 , the first portion 71 of the belt-shaped component 70 is indicated by a two-dot chain line, and the second portion 72 of the belt-shaped component 70 is indicated by a one-dot chain line. As an example, the shackle 80A includes a through-hole 81 that passes through the first annular component 74 and the second annular component 75 of the belt-shaped component 70, and a suppressing portion 82 that prevents the through-hole 81 from coming out of the first annular component 74 and the second annular component 75. The suppressing portion 82 is a U-shaped metal fitting. The through-hole 81 is a bolt that passes through one end of the suppressing portion 82 and engages with the other end of the suppressing portion 82. The shackle 80A binds the first annular component 74 and the second annular component 75 by inserting the through-hole 81 of the shackle 80A through the first annular component 74 and the second annular component 75.

[0038] 3, the strip-shaped part 70 has a wound portion 76. The wound portion 76 is a part of the ring-shaped portion of the strip-shaped part 70. The wound portion 76 is wound around the cross member 24 when the strip-shaped part 70 is inserted through the first through-hole 54 of the upper metal fitting 50.

[0039] <How to install safety belt attachments> A method for installing the safety belt attachment device 40 will be described with reference to FIGS. 2, 3, and 7 to 9.

[0040] The installation method for the safety belt fastening device 40 is a method of attaching the safety belt fastening device 40 for hanging a safety belt to the roof 20. The installation method for the safety belt fastening device 40 is a method of retrofitting the safety belt fastening device 40 to a roof 20 in a state where no safety belt fastening device 40 has been installed. Below, a case where the safety belt fastening device 40 is attached to the first cross member 36 of the cross members 24 will be described.

[0041] The installation method includes a dismantling step, a winding step, a connecting step, a fixing step, and a restoration step. The installation method further includes a preparation step.

[0042] In the preparation step, preparations for the dismantling step are made. In the preparation step, the ridge wrap 32, the undercut 33, and the roofing material 27 located around the attachment portion of the roof 20 where the safety belt attachment device 40 is attached are removed from the roof 20. The portions of the undercut 33 and the roofing material 27 that are to be placed on the first roof section 22 are removed.

[0043] As shown in FIG. 7, in the dismantling process, the sheathing boards 25 and roofing material 26 around the mounting portion of the roof 20 are dismantled to expose the cross member 24 from the roof 20. The mounting portion is set in a portion that does not overlap with the second metal fitting 29B in the first direction D1. By dismantling the roof 20, a work opening WP is formed around the mounting portion of the roof 20, allowing workers on the roof 20 to reach the periphery of the cross member 24. In the dismantling process, the waterproofing member 34 located around the mounting portion is cut away, and then the sheathing boards 25 and roofing material 26 located around the mounting portion are cut away. In the example of FIG. 7, the base material 31 located around the mounting portion is also dismantled.

[0044] As shown in FIG. 8, in the winding process, the strip-shaped component 70 of the lower metal fitting 60 is wound around the cross member 24 from above the roof 20. A worker performs the winding process from above the roof 20 through the work opening WP. As an example of a method for winding the strip-shaped component 70 around the cross member 24, first, as shown by the two-dot chain line in FIG. 8, the end of the strip-shaped component 70 is passed from above the ridge 21 between the first cross member 36 and the second cross member 37 and hung below the cross member 24. Then, as shown by the arrow A1 in FIG. 8, the end of the strip-shaped component 70 is pulled up from below the cross member 24, so that it is wound around the cross member 24 as shown by the strip-shaped component 70 in solid line in FIG. 8.

[0045] 9, in the connecting step, the upper fitting 50 is connected to the lower fitting 60 by joining the upper fitting 50 to the strip-shaped part 70. As shown by arrow A2 in FIG. 9, with the strip-shaped part 70 inserted through the first through-hole 54 of the upper fitting 50, the first portion 71 and the second portion 72 of the strip-shaped part 70 are bound together by the binding part 80.

[0046] As shown in Figure 3, in the fixing process, the upper fitting 50 is fixed to the roof 20. The upper fitting 50 is fixed to the roof 20 by hammering the fixing member 57 into the fixing portion 55 of the upper fitting 50. After the upper fitting 50 is connected to the roof 20, the ridge envelope 32 is attached. The fixing process may be performed after the restoration process.

[0047] In the restoration process, the sheathing boards 25 and roofing materials 26 located around the attachment parts that were dismantled in the demolition process are restored. In the restoration process, the work openings WP opened in the roof 20 in the demolition process are closed. After the sheathing boards 25 and roofing materials 26 located around the attachment parts have been restored, the base material 31 and waterproofing members 34 located around the attachment parts are restored. In the restoration process, the water drain 33 and roofing materials 27 may also be restored. As a result of the restoration process, the roof 20 is in the state shown in Figure 2.

[0048] <Operation of the embodiment> The operation of this embodiment will be described. The safety belt fastening device 40 is prevented from falling off the roof 20 by wrapping the belt-shaped part 70 of the lower fitting 60 around the cross member 24. The work of wrapping the belt-shaped part 70 around the cross member 24 can be performed from above the roof 20. Because the belt-shaped part 70 is long and flexible, the work opening WP can be small when installing the safety belt fastening device 40.

[0049] <Effects of the embodiment> The effects of this embodiment will be described. (1) The safety belt fastening device 40 is attached to the roof 20 and includes an upper fitting 50 with which the safety belt engages, and a lower fitting 60 connected to the upper fitting 50 and attached to the cross member 24. The lower fitting 60 has a belt-shaped part 70 that is wrapped around the cross member 24, and a binding part 80. The binding part 80 binds together a first portion 71 of the belt-shaped part 70 and a second portion 72 that is different from the first portion 71.

[0050] With this configuration, the safety belt fastening device 40 is connected to the cross member 24 by winding the belt-shaped part 70 around the cross member 24. A worker winds the belt-shaped part 70 around the cross member 24 from above the roof 20. The portion of the roof 20 that needs to be dismantled to wind the belt-shaped part 70 around the cross member 24 inside the roof 20 is small, as it is only necessary for the belt-shaped part 70 to pass through the dismantled part. When retrofitting the safety belt fastening device 40 to the roof 20, the portion of the roof 20 that needs to be dismantled around the cross member 24 can be reduced, so the safety belt fastening device 40 can be easily retrofitted to the roof 20.

[0051] (2) The upper metal fitting 50 is provided with a first through hole 54 through which the strip-shaped part 70 is inserted. The strip-shaped part 70 has a winding part 76 that is wound around the cross member 24 when the strip-shaped part 70 is inserted through the first through hole 54.

[0052] According to this configuration, the safety belt attachment device 40 can be connected to the cross member 24 by wrapping the belt-shaped part 70 around the cross member 24, so that the safety belt attachment device 40 can be easily attached to the roof 20 later.

[0053] (3) When the binding part 80 binds the first part 71 and the second part 72 of the band-shaped part 70, at least a portion of the band-shaped part 70 is formed into a ring shape. A portion of the ring-shaped portion of the band-shaped part 70 is inserted through the first through-hole 54. A portion of the upper metal fitting 50 surrounding the first through-hole 54 is inserted through the ring-shaped portion of the band-shaped part 70.

[0054] According to this configuration, the ring-shaped portion of the strip-shaped part 70 is inserted through the first through-hole 54, and a portion of the upper fitting 50 surrounding the first through-hole 54 is inserted through the ring-shaped portion of the strip-shaped part 70. Therefore, the binding part 80 binds the first part 71 and the second part 72 of the strip-shaped part 70 together, thereby connecting the strip-shaped part 70 to the upper fitting 50.

[0055] (4) The belt-shaped part 70 is a chain 70A made up of a plurality of annular parts 73. The binding part 80 is a shackle 80A. The shackle 80A binds together a first annular part 74 located in a first portion 71 of the plurality of annular parts 73 and a second annular part 75 located in a second portion 72 of the plurality of annular parts 73 by inserting a penetration part 81 of the shackle 80A through the first annular part 74 and the second annular part 75.

[0056] According to this configuration, the first portion 71 and the second portion 72 of the belt-shaped part 70 can be easily fastened together by the shackle 80A.

[0057] (5) The upper fitting 50 has a fixing portion 55 that is fixed to the roof 20. The fixing portion 55 is provided with a second through hole 56 through which a fixing member 57 that fixes the upper fitting 50 to the roof 20 is inserted.

[0058] According to this configuration, the upper fitting 50 is attached to the cross member 24 by the lower fitting 60, and is further fixed to the roof 20 by the fixing member 57. The fixing member 57 can prevent the upper fitting 50 from moving on the roof 20.

[0059] There is a risk that a load exceeding the specification limit may be applied to the safety belt fastening device 40. For example, there is a case where the safety belts of multiple workers are hung from the safety belt fastening device 40 at the same time. In this case, an excessive load may be applied to the safety belt fastening device 40, and the upper fitting 50 may come off the base material 31. Even in such a case, the safety belt fastening device 40 is unlikely to fall off the roof 20 because the belt-shaped part 70 is wrapped around the cross member 24. Even if the fixing part 55 of the upper fitting 50 comes off the base material 31, the upper fitting 50 only moves by an amount corresponding to the margin of the loop size of the belt-shaped part 70 relative to the thickness of the cross member 24. Therefore, when the upper fitting 50 comes off the base material 31, the load applied to the worker is small, and the worker can be reliably supported.

[0060] (6) The building 10 includes a roof 20. The roof 20 includes cross members 24, sheathing boards 25 arranged on the cross members 24, roofing materials 26 arranged on the sheathing boards 25, and safety belt attachment devices 40.

[0061] According to this configuration, the safety belt attachment device 40 can be easily attached to the roof 20. Therefore, work on the roof 20 of the building 10 can be carried out conveniently.

[0062] (7) The roof 20 has a first roof section 22 that slopes in one direction relative to the ridge 21 of the roof 20, and a second roof section 23 that slopes in the other direction relative to the ridge 21. The first roof section 22 has a first cross member 36 that is arranged near the ridge 21. The second roof section 23 has a second cross member 37 that is arranged near the ridge 21. The belt-shaped component 70 of the safety belt attachment device 40 is wound around either the first cross member 36 or the second cross member 37.

[0063] According to this configuration, in a roof such as a gable roof, the belt-shaped part 70 is wound around either the first cross member 36 or the second cross member 37. Therefore, when retrofitting the safety belt fastening device 40 to the roof 20, the safety belt fastening device 40 can be attached simply by dismantling either the first roof section 22 or the second roof section 23. Therefore, the amount of work required to dismantle and restore the roof can be reduced compared to when both the first roof section 22 and the second roof section 23 need to be dismantled and restored.

[0064] (8) The construction method includes a dismantling process, a wrapping process, a connecting process, a fixing process, and a restoration process. In the dismantling process, the sheathing boards 25 and roofing material 26 around the attachment portion of the roof 20 where the safety belt attachment device 40 is attached are removed to expose the cross member 24 from the roof 20. In the wrapping process, the strip-shaped part 70 of the lower metal fitting 60 is wrapped around the cross member 24 from above the roof 20. In the connecting process, the upper metal fitting 50 is connected to the lower metal fitting 60 by joining the upper metal fitting 50 to the strip-shaped part 70. In the fixing process, the upper metal fitting 50 is fixed to the roof 20. In the restoration process, the sheathing boards 25 and roofing material 26 around the attachment portion that were dismantled in the dismantling process are restored.

[0065] With this configuration, the lower fittings 60 can be attached to the cross members 24 by wrapping the strip-shaped parts 70 around the cross members 24 from above the roof 20, eliminating the need for workers to enter the attic of the roof 20. This reduces the area of ​​the roof 20 that is dismantled during the dismantling process. Because the amount of work required for dismantling and restoration is reduced, the safety harness fasteners 40 can be easily retrofitted to the roof 20.

[0066] Furthermore, the task of fastening the safety belt attachment device 40 to the cross member 24 while looking up at the cross member 24 from the attic of the roof 20 places a great burden on the worker. However, since the worker can work on the roof 20, the worker can work in a posture that places less strain on the worker.

[0067] <Modification> The above-described embodiments are examples of possible forms that the building 10, the safety belt attachment device 40, and the installation method of the safety belt attachment device 40 can take, and are not intended to limit the forms. The building 10, the safety belt attachment device 40, and the installation method of the safety belt attachment device 40 can take forms different from those exemplified in the above-described embodiments. Examples of such forms include forms in which part of the configuration of the embodiments is replaced, changed, or omitted, or forms in which a new configuration is added to the embodiments. Modified examples of the embodiments are shown below.

[0068] Although the roof 20 in which the first horizontal member 36 and the second horizontal member 37 are configured as a ridge beam has been described, the safety belt fastening device 40 can also be applied to a roof in which the ridge beam is configured from a single horizontal member 24. Even in such a roof, the safety belt fastening device 40 can be installed by dismantling and restoring only either the first roof section 22 or the second roof section 23.

[0069] The method of connecting the upper fitting 50 and the lower fitting 60 is not limited to the method of inserting the strip-shaped part 70 through the first through-hole 54. For example, the upper fitting 50 and the strip-shaped part 70 wrapped around the cross member 24 may be connected by a part. Examples of parts that can be used to connect the upper fitting 50 and the strip-shaped part 70 include a hose band, wire, a padlock, a metal wire, a rope, webbing, and a sling.

[0070] A portion of the strip-shaped part 70 other than the ring-shaped portion may be inserted through the first through hole 54. For example, the ring-shaped portion of the strip-shaped part 70 may be wrapped around the cross member 24, and a portion of the end of the strip-shaped part 70 may be inserted through the first through hole 54. In this modification, the end of the strip-shaped part 70 is connected to the upper fitting 50.

[0071] The belt-shaped part 70 may be a metal wire, rope, webbing, sling, or other part instead of the chain 70A, as long as it can withstand the load of the worker.

[0072] The binding part 80 may be a part such as a hose band, wire, padlock, or carabiner instead of the shackle 80A, as long as it can withstand the load of the worker.

[0073] The base material 31 may be omitted from the roof 20, and the fixing portion 55 of the upper fitting 50 may be fixed to the sheathing boards 25 of the roof 20. Alternatively, the fixing portion 55 of the upper fitting 50 may be fixed to the truss of the roof 20.

[0074] The strip-shaped component 70 may be wrapped around the second cross member 37, or may be wrapped around both the first cross member 36 and the second cross member 37. Even when the strip-shaped component 70 is wrapped around both the first cross member 36 and the second cross member 37, the strip-shaped component 70 can be wrapped through the work opening WP of the roof 20 by dismantling only one of the first roof section 22 and the second roof section 23.

[0075] The present specification discloses the following techniques. [Appendix 1] A safety belt attachment device for attaching a safety belt to a roof, comprising: an upper fitting attached to the roof and with which the safety belt engages; and a lower fitting connected to the upper fitting and attached to a cross member of the roof, wherein the lower fitting has a strip-shaped part wrapped around the cross member and a binding part binding together a first part of the strip-shaped part and a second part different from the first part.

[0076] [Appendix 2] The safety belt attachment device according to Appendix 1, wherein the upper metal fitting is provided with a first through hole through which the belt-shaped part is inserted, and the belt-shaped part has a winding part that is wound around the cross member when the belt-shaped part is inserted through the first through hole.

[0077] [Appendix 3] The safety belt attaching device according to Appendix 2, wherein the binding part binds the first part and the second part of the belt-shaped part, thereby forming at least a portion of the belt-shaped part into a ring shape, a portion of the ring-shaped part of the belt-shaped part is inserted through the first through-hole, and a portion of the upper metal fitting surrounding the first through-hole is inserted through the ring-shaped part of the belt-shaped part.

[0078] [Appendix 4] The safety belt attachment device according to Supplementary Note 1, wherein the belt-shaped part is a chain connecting a plurality of ring parts, the binding part is a shackle, and the shackle binds together a first ring part located in the first portion of the plurality of ring parts and a second ring part located in the second portion of the plurality of ring parts by inserting a penetration part of the shackle through the first ring part and the second ring part.

[0079] [Appendix 5] The safety belt attachment device described in Appendix 1, wherein the upper fitting has a fixing portion that is fixed to the roof, and the fixing portion is provided with a second through-hole through which a fixing member that fixes the upper fitting to the roof is inserted.

[0080] [Appendix 6] A building having the roof, wherein the roof comprises a cross member, a sheathing board placed on the cross member, a roofing material placed on the sheathing board, and a safety belt attachment device according to any one of appendices 1 to 5.

[0081] [Appendix 7] The building described in Appendix 6, wherein the roof has a first roof section that slopes in one direction relative to the ridge of the roof and a second roof section that slopes in the other direction relative to the ridge, the first roof section has a first cross member arranged near the ridge, the second roof section has a second cross member arranged near the ridge, and the belt-shaped part of the safety belt attachment device is wrapped around either the first cross member or the second cross member.

[0082] [Appendix 8] A method for installing a safety belt attachment for hanging a safety belt on a roof, the roof comprising a cross member, a sheathing board placed on the cross member, and a roof material placed on the sheathing board, the safety belt attachment comprising an upper metal fitting attached to the roof and with which the safety belt engages, and a lower metal fitting connected to the upper metal fitting and attached to the cross member, the lower metal fitting having a belt-shaped part wound around the cross member, and a periphery of an attachment part on the roof to which the safety belt attachment is attached a winding step of winding the strip-shaped part of the lower fitting around the cross member from above the roof; a connecting step of connecting the upper fitting to the lower fitting by joining the upper fitting to the strip-shaped part; a fixing step of fixing the upper fitting to the roof; and a restoration step of restoring the sheathing and roof material located around the attachment part that were dismantled in the demolition step. [Explanation of symbols]

[0083] 10...building, 20...roof, 21...ridge, 22...first roof section, 23...second roof section, 24...cross member, 25...sheathing board, 26...roofing material, 36...first cross member, 37...second cross member, 40...safety belt mounting device, 50...upper metal fitting, 54...first through hole, 55...fixing section, 56...second through hole, 57...fixing member, 60...lower metal fitting, 70...belt-shaped part, 70A...chain, 71...first part, 72...second part, 73...ring-shaped part, 74...first ring-shaped part, 75...second ring-shaped part, 76...winding section, 80...binding part, 80A...shackle, 81...penetration section.

Claims

1. A safety belt attachment device for attaching a safety belt to a roof, an upper fitting attached to the roof and with which the safety belt engages; a lower fitting connected to the upper fitting and attached to the roof cross member; The lower metal fitting is A strip-shaped part that is wound around the cross member; a binding part that binds a first part of the strip-shaped part and a second part different from the first part, The upper metal fitting is provided with a first through hole through which the strip-shaped part is inserted, The strip-shaped part has a winding portion that is wound around the cross member when the strip-shaped part is inserted through the first through hole. Safety belt attachment device.

2. The binding component binds the first portion and the second portion of the band-shaped component, thereby forming at least a portion of the band-shaped component into a loop shape, a part of the annular portion of the belt-shaped component is inserted through the first through-hole; a portion of the upper metal fitting surrounding the first through hole is inserted through a portion of the belt-shaped component that is formed in a ring shape; 2. The safety belt attachment device of claim 1.

3. A safety belt attachment device for attaching a safety belt to a roof, an upper fitting attached to the roof and with which the safety belt engages; a lower fitting connected to the upper fitting and attached to the roof cross member; The lower metal fitting is A strip-shaped part that is wound around the cross member; a binding part that binds a first part of the strip-shaped part and a second part different from the first part, the belt-shaped part is a chain of a plurality of annular parts connected together, the binding part is a shackle, The shackle fastens a first annular component located in the first portion among the plurality of annular components and a second annular component located in the second portion among the plurality of annular components by inserting a penetration portion of the shackle through the first annular component and the second annular component. Safety belt attachment device.

4. A safety belt attachment device for attaching a safety belt to a roof, an upper fitting attached to the roof and with which the safety belt engages; a lower fitting connected to the upper fitting and attached to the roof cross member; The lower metal fitting is A strip-shaped part that is wound around the cross member; a binding part that binds a first part of the strip-shaped part and a second part different from the first part, The upper fitting has a fixing portion that is fixed to the roof, The fixing portion is provided with a second through hole through which a fixing member that fixes the upper fitting to the roof is inserted. Safety belt attachment device.

5. A building having the roof, The roof is A cross member, A sheathing board placed on the cross member; A roofing material to be placed on the sheathing board; and a safety belt attachment device according to any one of claims 1 to 4. architecture.

6. The roof has a first roof portion that slopes in one direction relative to a ridge of the roof, and a second roof portion that slopes in the other direction relative to the ridge, The first roof portion has a first cross member arranged near the ridge portion, The second roof portion has a second cross member arranged near the ridge portion, The belt-shaped component of the safety belt attachment device is wound around either the first cross member or the second cross member. The building according to claim 5.

7. A method for installing a safety belt attachment device for hanging a safety belt on a roof, comprising: The roof comprises a cross member, a sheathing board placed on the cross member, and a roof material placed on the sheathing board, The safety belt attachment device is attached to the roof and includes an upper fitting with which the safety belt engages, and a lower fitting connected to the upper fitting and attached to the cross member, and the lower fitting has a strip-shaped part that is wound around the cross member, and a binding part that binds together a first portion of the strip-shaped part and a second portion different from the first portion, The upper metal fitting is provided with a first through hole through which the strip-shaped part is inserted, the strip-shaped part has a winding portion that is wound around the cross member when the strip-shaped part is inserted through the first through hole, The construction method includes: a dismantling process of exposing the cross member from the roof by dismantling the sheathing board and the roof material around the attachment portion of the roof to which the safety belt attachment device is attached; a winding step of winding the strip-shaped component of the lower metal fitting around the cross member from above the roof; a connecting step of connecting the upper fitting to the lower fitting by joining the upper fitting to the strip-shaped component; a fixing step of fixing the upper fitting to the roof; A restoration process for restoring the sheathing boards and the roof material located around the mounting portion dismantled in the demolition process. How to install safety belt attachment devices.

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