Pipes for lifeline support posts, lifeline support posts, and lifeline tensioning structure

Abstract

To provide a pipe for a lifeline support, a lifeline support, and a lifeline tensioning structure that are resistant to deformation even when excessive force is applied to the lifeline, and where the part fixed to the roof surface does not shift, detach, or break, and which has a simple structure, is inexpensive, and is easy to install and remove. [Solution] The main rope support pipe 10 comprises a first pipe 11 and a second pipe 12. The first pipe 11 is a roughly U-shaped pipe having a first inclined surface fixing part 11a fixed to the inclined surface 3, a first inclined surface upright part 11b standing upright on the first inclined surface fixing part 11a, and a first connecting part 11c extending perpendicular to the axial direction of the first inclined surface upright part 11b. The second pipe 12 is a roughly U-shaped pipe having a second inclined surface fixing part 12a fixed to the inclined surface 3, a second inclined surface upright part 12b standing upright on the second inclined surface fixing part 12a, and a second connecting part 12c extending perpendicular to the axial direction of the second inclined surface upright part 12b. The first connecting part 11c and the second connecting part 12c are connected by a connecting pipe.

Description

Technical Field

[0001] The present invention relates to a pipe for a main rope support column used for a main rope support column installed on an inclined roof, the main rope support column, and a main rope stretching structure.

Background Art

[0002] Various equipment and devices such as solar panels and outdoor units are installed on the inclined roofs of buildings, and the roofs themselves are also repaired. At this time, safety protection measures such as stretching a main rope to attach a lifeline or safety belt worn by workers for fall prevention, or installing a safety fence to prevent members of installed equipment from falling from the roof are taken. When taking safety protection measures on such inclined roofs, various proposals have been made from the viewpoints of simplification of the structure, ease of installation and removal, and the like.

[0003] For example, in Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2008-19604), a pair of opposing side frames 1, 1, a bottom panel 2 detachably coupled between the bottoms of the side frames 1, 1, and an elastic load receiving panel 3 also detachably coupled between the backs of the side frames 1, 1, and a traction member 4 (connected to the support member 15) or a stopper (nail, lock pin) coupled to the tip of each side frame 1, 1. A fall protection device for inclined surface construction is disclosed, which is fixed at an arbitrary position on an inclined surface such as a roof or a slope through the traction member or the stopper, and receives a worker falling from above the inclined surface or a falling member. However, since the fall protection device of Patent Document 1 is fixed to the inclined surface of the roof through the traction member 4 or the stopper coupled to the tip of each side frame 1, 1, it cannot be installed on a roof without a support member 15 for connecting the traction member 4 or a roof on which stoppers such as nails and lock pins cannot be attached. In addition, there is a problem that the lower end side of each side frame 1, 1 that is not fixed is likely to move and cannot be stably fixed to the inclined surface of the roof. Furthermore, in the fall protection device described in Patent Document 1, a bottom panel 2 is connected between the bottoms of each side frame 1,1, and a load-receiving panel 3 is connected between the backs of each side frame 1,2. As a result, the distance between each side frame 1,1 cannot be increased, and in order to attach a pair of side frames 1,1 to the entire roof without any gaps, one side frame 1 of adjacent side frames 1,1 will overlap with the other side frame 1, requiring a large number of side frames 1, which increases costs and presents problems in terms of the amount of effort required for installation and removal.

[0004] Patent Document 2 (Japanese Patent Publication No. 2009-228209) describes a lifeline tensioning device 11 having a plurality of lifeline tensioning posts 12 and lifelines 13, wherein the lifeline tensioning posts 12 consist of a post body 14 erected vertically, two diagonal supports 15A, 15B, roof mounting means 16A, 16B, 16C for attaching these to a folded-sheet roof 6, and lifeline mounting means 17, and a first mounting piece 18 and a second mounting piece 19 are fixed to the upper part of the post body 14, and the diagonal supports 15A, 15B are connected to both mounting pieces 18, 19 by pins 20, 21, A lifeline tensioning device 11 for a folded plate roof is disclosed, in which a lifeline attachment means 17 is fixed to the top of the column body 14 for detachably attaching a fastener 22 provided on the lifeline 13, and the diagonal support 15A has a hollow outer cylinder 15a and a hollow inner cylinder 15b that slidably fits therein, and can be set to any length and held thereby by a plurality of holes provided in the outer cylinder 15a and inner cylinder 15b and a locking fitting 27, and the diagonal support 15B is also formed with the same structure as the first diagonal support 15A, and is extendable and can hold its length. However, in the lifeline tensioning device 11 of Patent Document 2, the first mounting bracket 29 is fixed to the lower end of the support column body 14, and the first mounting bracket 29 is attached to the seam portion 5 of the seam-type folded plate roof 6 via a snow guard fitting 43. Therefore, if an excessive force is applied to the lifeline 13 stretched on the lifeline tensioning support column 12 and the support column body 14 tilts, a large force will be applied to the lower end of the support column body 14, attempting to pull the support column body 14 away from the seam portion 5. This may cause the first mounting bracket 29 to detach from the snow guard fitting 43, or the first mounting bracket 29 and the snow guard fitting 43 to be damaged. Furthermore, the lifeline tensioning device 11 of Patent Document 1 comprises a support column body 14 and two diagonal supports 15A and 15B attached to the support column body 14 via mounting pieces 18 and 19. The diagonal support 15A has an outer cylinder 15a, an inner cylinder 15b, and a locking fitting 27 for length adjustment, and the support 15B has the same structure as the support 15A. Overall, it has a complex structure with a large number of parts, which leads to the problem of high costs. Furthermore, when attaching the lifeline tensioning device 11 of Patent Document 2 to a corrugated metal roof, it is necessary to adjust the length by extending or retracting each of the diagonal supports 15A and 15B, which presents a problem as it requires a great deal of effort to install.

[0005] Patent Document 3 (Japanese Patent Publication No. 2014-198989) discloses a safety device for a corrugated metal roof in which a pair of two support columns 2 are installed at appropriate intervals, and a lifeline 9 can be stretched between the upper ends of the support columns 2. The support columns 2 are constructed by combining a set of three legs 3 of the same shape and size in a tripod shape, and the upper ends of the legs 3 can be connected in a manner that allows for relative rotation and disassembly. Each leg 3 consists of a main body 3a, an upper connecting piece 3b bent at a predetermined angle relative to the main body 3a, a lower connecting piece 3c, and a stiffening rib 6. The upper connecting pieces 3b of each of the three legs 3 are connected by connecting fittings 7 (eyebolts), and the lower connecting pieces 3c of each of the three legs 3 are fixed to the seam portion 1a of the corrugated metal roof 1 using fixing fittings 8. However, in the safety equipment described in Patent Document 3, although the leg body 3 is made of a metal strip and is provided with stiffening ribs 6, its strength is inferior to that of pipes, etc., and if an excessive force is applied to the lifeline 9, the leg body 3 is prone to deformation such as bending significantly, which is a problem as it will no longer function adequately as safety equipment. Furthermore, in the safety equipment described in Patent Document 3, since the lower end (lower connecting piece 3c) of the leg body 3 is fixed to the seam portion 1a of the corrugated roof 1 with a fixing bracket 8, if an excessive force is applied to the lifeline 9, a large force will be applied to the lower end (lower connecting piece 3c) of any of the three leg bodies 3, attempting to pull the fixing bracket 8 away from the seam portion 1a. This could cause the fixing bracket 8 to shift or detach from the seam portion 1a, or the lower connecting piece 3c or the fixing bracket 8 to be damaged. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2008-19604 [Patent Document 2] Japanese Patent Publication No. 2009-228209 [Patent Document 3] Japanese Patent Publication No. 2014-198989 [Overview of the project] [Problems that the invention aims to solve]

[0007] The problem that this invention aims to solve is to provide a lifeline support pipe, lifeline support, and lifeline tensioning structure that, when installed on a sloping roof, is resistant to deformation even when excessive force is applied to the lifeline, prevents the part fixed to the roof surface from shifting, coming loose, or being damaged, has a simple structure, is inexpensive, and is easy to install and remove.

[0008] The invention of claim 1 is a pipe for a lifeline support installed on the inclined surface of a metal roof, comprising: a first inclined surface fixing portion fixed to the inclined surface so as to follow the inclined surface; a first inclined surface upright portion that is continuous with the first inclined surface fixing portion and extends perpendicular to the axial direction of the first inclined surface fixing portion and stands upright on the first inclined surface; and a first connecting portion that faces the first inclined surface fixing portion and extends perpendicular to the axial direction of the first inclined surface upright portion, and a substantially U-shaped first pipe having The present invention provides a main rope support pipe comprising: a second inclined surface fixing portion fixed to the inclined surface; a second inclined surface upright portion that is continuous with the second inclined surface fixing portion and extends perpendicular to the axial direction of the second inclined surface fixing portion and stands upright on the second inclined surface; and a substantially U-shaped second pipe having a second connecting portion that faces the second inclined surface fixing portion and extends perpendicular to the axial direction of the second inclined surface upright portion, and the first connecting portion and the second connecting portion are connected by the pipe connecting portion, thereby solving the above problem.

[0009] The invention of claim 2 solves the above problem by providing a main rope support pipe, wherein the pipe connecting portion is provided with a displacement and rotation prevention means that prevents the first pipe from shifting relative to the second pipe in the axial direction of the first connecting portion and prevents the first pipe from rotating relative to the second pipe by more than a certain angle.

[0010] The invention of claim 3 solves the above problem by providing a main rope support pipe in which the pipe connecting portion is formed by fitting the end of the first connecting portion into one longitudinal side of the connecting pipe and fitting the end of the second connecting portion into the other longitudinal side of the connecting pipe.

[0011] The invention of claim 4 solves the above problem by providing a pipe for a lifeline support post, which has lifeline attachment portions provided at a first boundary portion that forms the boundary between the first inclined surface upright portion and the first connecting portion and / or a second boundary portion that forms the boundary between the second inclined surface upright portion and the second connecting portion, for attaching a lifeline.

[0012] The invention of claim 5 solves the above problem by providing a pipe for a lifeline support post, which has a lifeline attachment portion for attaching a lifeline at the axial center of the pipe connecting portion.

[0013] The invention of claim 6 solves the above problem by providing a pipe for a lifeline support post in which a short pipe with a ring is attached to the pipe connecting portion, and a ring for attaching a lifeline is provided on the short pipe with a ring.

[0014] The invention of claim 7 is a lifeline support column comprising a lifeline support column pipe and a support column fixing member for fixing the lifeline support column pipe to the inclined surface of a metal roof, wherein the lifeline support column pipe has a first inclined surface fixing portion fixed to the inclined surface so as to be along the inclined surface, a first inclined surface upright portion that is continuous with the first inclined surface fixing portion and extends perpendicular to the axial direction of the first inclined surface fixing portion and stands upright on the first inclined surface, a first pipe that is substantially U-shaped having a first connecting portion that faces the first inclined surface fixing portion and extends perpendicular to the axial direction of the first inclined surface upright portion, and a second inclined surface fixing portion fixed to the inclined surface so as to be along the inclined surface, and The present invention provides a main rope support column comprising a second inclined surface fixing portion that is continuous with the second inclined surface fixing portion and extends perpendicular to the axial direction of the second inclined surface fixing portion and stands upright on the second inclined surface, and a substantially U-shaped second pipe having a second connecting portion that faces the second inclined surface fixing portion and is continuous with the second inclined surface fixing portion and extends perpendicular to the axial direction of the second inclined surface fixing portion, wherein the support column fixing member comprises a first pipe gripping fixing member for fixing the first inclined surface fixing portion to the inclined surface and a second pipe gripping fixing member for fixing the second inclined surface fixing portion to the inclined surface, and the first connecting portion and the second connecting portion are connected by the pipe connecting portion, thereby solving the above problem.

[0015] The invention of claim 8 is a lifeline tensioning structure comprising a plurality of lifeline support posts installed at intervals on the inclined surface of a metal roof, and a lifeline stretched between the plurality of lifeline support posts, wherein each of the plurality of lifeline support posts comprises a lifeline support post pipe and a support post fixing member for fixing the lifeline support post pipe to the inclined surface, the lifeline support post pipe comprises a first inclined surface fixing portion fixed to the inclined surface so as to be along the inclined surface, a first inclined surface upright portion that is continuous with the first inclined surface fixing portion and extends perpendicular to the axial direction of the first inclined surface fixing portion and stands upright on the first inclined surface, a first pipe that is substantially U-shaped having a first connecting portion that faces the first inclined surface fixing portion and extends perpendicular to the axial direction of the first inclined surface upright portion, a second inclined surface fixing portion fixed to the inclined surface so as to be along the inclined surface, and the second inclined surface fixing portion The present invention provides a main rope tensioning structure comprising a second inclined surface upright portion that extends perpendicular to the axial direction of the second inclined surface fixing portion and stands upright on the second inclined surface, and a substantially U-shaped second pipe having a second connecting portion that faces the second inclined surface fixing portion and extends perpendicular to the axial direction of the second inclined surface upright portion, wherein the support column fixing member comprises a first pipe gripping fixing member for fixing the first inclined surface fixing portion to the inclined surface, and a second pipe gripping fixing member for fixing the second inclined surface fixing portion to the inclined surface, wherein the first connecting portion and the second connecting portion are connected by the pipe connecting portion, the first inclined surface fixing portion is fixed to the inclined surface by the first pipe gripping fixing member, and the second inclined surface fixing portion is fixed to the inclined surface by the second pipe gripping fixing member, thereby solving the above problem. [Effects of the Invention]

[0016] In the lifeline support pipe of the invention described in claim 1, when the lifeline support pipe is fixed to the inclined surface of a metal roof, even if an excessive force is applied to the lifeline attached to the lifeline support pipe, the lifeline support pipe is less likely to deform, the parts that fix the first inclined surface fixing part and the second inclined surface fixing part to the inclined surface will not shift, come off, or be damaged, the lifeline support pipe has a simple structure and is cost-effective, and the lifeline support pipe can be easily attached to and removed from the inclined surface.

[0017] In the pipe for the main cable support column of the invention according to claim 2, further, since the displacement and rotation prevention means is provided, the second pipe does not easily axially displace or come off from the first pipe, the rotation of the second pipe with respect to the first pipe is restricted to a certain angle, and effects such as the operations of storing, transporting, attaching and detaching the pipe for the main cable support column to and from the inclined surface of the roof can be easily performed are achieved.

[0018] In the pipe for the main cable support column of the invention according to claim 3, further, since the end portion of the first connecting portion is fitted into one longitudinal side of the connecting pipe and the end portion of the second connecting portion is fitted into the other longitudinal side of the connecting pipe to connect the first connecting portion and the second connecting portion, effects such as the first connecting portion and the second connecting portion can be easily connected, the first pipe and the second pipe can be brought into a closed state, and it is convenient for storage, transportation, movement, etc. without being bulky are achieved.

[0019] In the pipe for the main cable support column of the invention according to claim 4, further, since the main cable attachment portion is provided at the first boundary portion and / or the second boundary portion, effects such as the main cable can be easily attached are achieved.

[0020] In the pipe for the main cable support column of the invention according to claim 5, further, even if an excessive force acts on the main cable attached to the pipe for the main cable support column, almost no moment acts to rotate the pipe for the main cable support column along the inclined surface, and effects such as the portions fixing the first inclined surface fixing portion and the second inclined surface fixing portion to the inclined surface become more difficult to come off are achieved.

[0021] In the pipe for the main cable support column of the invention according to claim 6, further, even if an excessive force acts on the main cable attached to the ring portion of the short pipe with a ring, almost no moment acts to rotate the pipe for the main cable support column along the inclined surface, and effects such as the portions fixing the first inclined surface fixing portion and the second inclined surface fixing portion to the inclined surface become more difficult to come off are achieved.

[0022] In the main cable support column of the invention according to claim 7, the first inclined surface fixing portion is fixed to the inclined surface by the first pipe gripping and fixing member, the second inclined surface fixing portion is fixed to the inclined surface by the second pipe gripping and fixing member, and the first connecting portion and the second connecting portion are connected by the pipe connecting portion. Therefore, even if an excessive force acts on the main cable attached to the main cable support column pipe, the main cable support column pipe is difficult to deform, and the fixing portions of the first pipe gripping and fixing member and the second pipe gripping and fixing member to the inclined surface do not shift, come off, or break. The main cable support column has a simple structure and low cost, and the attachment and detachment of the main cable support column to the inclined surface 3 are also easy.

[0023] In the main cable tensioning structure of the invention according to claim 8, the first inclined surface fixing portion is fixed to the inclined surface by the first pipe gripping and fixing member, the second inclined surface fixing portion is fixed to the inclined surface by the second pipe gripping and fixing member, and the first connecting portion and the second connecting portion are connected by the pipe connecting portion. Therefore, even if an excessive force acts on the main cable attached to the main cable support column pipe, the main cable support column pipe is difficult to deform, and the fixing portions of the first pipe gripping and fixing member and the second pipe gripping and fixing member to the inclined surface do not shift, come off, or break. The main cable support column has a simple structure and low cost, and the attachment and detachment of the main cable support column to the inclined surface 3 are also easy.

Brief Description of the Drawings

[0024] [Figure 1] It is a perspective view of the state where the main cable support column of the present invention is installed on the inclined surface of a folded plate roof. [Figure 2] It is a view of the main cable support column of FIG. 1 seen from a direction perpendicular to the inclined surface of the folded plate roof. [Figure 3] It is a view of the main cable support column of FIG. 1 seen from the inclined direction of the inclined surface of the folded plate roof. [Figure 4] It is a left side view of the main cable support column of FIG. 1. [Figure 5] It is a right side view of the main cable support column of FIG. 1. [Figure 6] It is an exploded perspective view of the state where the main cable support column shown in FIG. 1 is placed on a horizontal plane. [Figure 7] Figure 6 is an enlarged exploded perspective view of the connecting pipe shown. [Figure 8] This is an enlarged view of section A in Figure 2. [Figure 9] Figure 8 shows cross-sectional views of BB, CC, and DD. [Figure 10] This is a perspective view of the main rope support pipe 10, showing the first pipe 11 and the second pipe 12 in a closed state and an open state. [Figure 11] This is a cross-sectional view (CC) when the first pipe 11 is rotated to its maximum right (clockwise), and a cross-sectional view (DD) when the second pipe 12 is rotated to its maximum left (counterclockwise). [Figure 12] This is a perspective view showing a part of a lifeline tensioning structure in which lifelines are stretched between multiple lifeline support posts installed at intervals on the sloping surface 3 of a corrugated metal roof 2. [Figure 13] Figure 12 shows the lifeline tensioning structure 1A, with a force P acting in the Sh direction on the center between lifeline support posts 1 and 1' of the lifeline MR2, as viewed from the Sv direction. [Figure 14] These are perspective, plan, and front views of a short pipe with a ring attached, used for the support posts used to attach the lifeline. [Figure 15] Figure 14 shows perspective views of a main rope support pipe with a ring attached, in both a closed and open state. [Figure 16] Figure 15 is a plan view of the main rope support pipe in its open state. [Figure 17] This is an enlarged view of section A' in Figure 16. [Figure 18] Figure 17 shows the EE and FF cross-sectional views. [Figure 19] This is a perspective view showing a part of a lifeline tensioning structure in which lifelines are stretched between multiple lifeline support posts equipped with lifeline support pipes 30, etc., which are installed at intervals on the sloping surface 3 of a corrugated metal roof 2. [Figure 20] Figure 19 shows the lifeline tensioning structure 1B, and the view from the Sv direction shows the state in which a force P acts in the Sh direction on the center between lifeline supports 1P and 1P' of lifeline MR3. [Modes for carrying out the invention]

[0025] [Main rope support] Figure 1 is a perspective view of the lifeline support of the present invention installed on the inclined surface of a corrugated metal roof, Figure 2 is a view of the lifeline support of Figure 1 from a direction perpendicular to the inclined surface of the corrugated metal roof (plan view), Figure 3 is a view of the lifeline support of Figure 1 from the direction of inclination of the inclined surface of the corrugated metal roof (front view), Figure 4 is a left side view of the lifeline support of Figure 1, Figure 5 is a right side view of the lifeline support of Figure 1, Figure 6 is an exploded perspective view of the lifeline support shown in Figure 1 placed on a horizontal surface, Figure 7 is an enlarged exploded perspective view of the connecting pipe shown in Figure 6, Figure 8 is an enlarged view of part A in Figure 2, Figure 9(a) is a cross-sectional view of BB in Figure 8, Figure 9(b) is a cross-sectional view of CC in Figure 8, and Figure 9(c) is a cross-sectional view of DD in Figure 8. In the diagram, 1 is the main rope support, 2 is the corrugated metal roof, 3 is the inclined surface, 3a, 3b, and 3c are the valleys, 4a and 4b are the peaks, 5a and 5b are the seams, 10 is the pipe for the main rope support, 11 is the first pipe, 11a is the first inclined surface fixing part, 11b is the first inclined surface upright part, 11c is the first connecting part, 11h is the elongated hole, 11r is the ring part, 12 is the second pipe, and 12a is the second inclined surface fixing part. Fixed part, 12b is the second inclined surface upright part, 12c is the second connecting part, 12h is the elongated hole, 12r is the ring part, 13 is the connecting pipe, 13a is the outer pipe, 13b is the inner pipe, 13b1 is the first fitting part, 13b2 is the second fitting part, 13h1 and 13h2 are holes, 14 and 15 are connecting springs, 14a and 15a are spring plates, 14p and 15p are projections, and 14p1 14p2, 15p1, and 15p2 are projections, 20 is a support fixing member, 21, 22, 23, and 24 are pipe gripping and fixing members, 21a, 22a, 23a, and 24a are pipe gripping parts, 21b, 21c, 22b, 22c, 23b, 23c, 24b, and 24c are clamping plates, 21ah, 21bh, 21ch, 22ah, 22bh, 22ch, 23ah, 23bh, 23ch, 24ah, 24bh, and 24ch are bolt holes, 21d, 22d, 23d, and 24d are bolts, and 21e, 22e, 23e, and 24e are nuts. In each figure, X is the left-right direction, Y is the front-back direction, Z is the up-down direction (vertical direction), Sh is the inclination direction of the inclined surface of the corrugated metal roof, and Sv is the direction perpendicular to the inclined surface of the corrugated metal roof. As shown in the figure, the main rope support post 1 comprises a main rope support post pipe 10 and a support post fixing member 20, and is installed on the inclined surface 3 of the corrugated metal roof 2. The corrugated metal roof 2 is a metal roof of the seam-fastened type made by joining steel plates together and bending them into a corrugated (uneven) shape. Its sloping surface, the inclined surface 3, is tilted at an angle θ with respect to the horizontal plane and consists of a series of flat valleys 3a, 3b, and 3c and trapezoidal peaks 4a, 4b (the diagram shows parts of the valleys and peaks). On the upper surfaces of the peaks 4a, 4b, seams 5a, 5b are formed by bending and joining the joints of the steel plates.

[0026] [Pipe for supporting the main rope] The main rope support pipe 10 comprises a first pipe 11, a second pipe 12, and a connecting pipe 13. The first pipe 11 is formed by bending a single cylindrical metal pipe into a roughly U-shape, and consists of a first inclined surface fixing portion 11a, a first inclined surface upright portion 11b, and a first connecting portion 11c, with the first inclined surface fixing portion 11a and the first connecting portion 11c being continuous at both ends of the first inclined surface upright portion 11b. The first inclined surface fixing portion 11a is a part that is fixed to the inclined surface 3 of the corrugated plate roof 2 so as to follow the inclined surface 3, and extends in one direction. The first inclined surface upright portion 11b extends perpendicular to the axial direction of the first inclined surface fixing portion 11a and stands upright on the first inclined surface fixing portion 11a. The first connecting portion 11c extends perpendicular to the axial direction of the first inclined surface upright portion 11b, facing the first inclined surface fixing portion 11a, and is shorter than the first inclined surface fixing portion 11a. Near the end of the first connecting portion 11c where the first inclined surface upright portion 11b is not continuous, an elongated hole 11h extending in the circumferential direction is provided. Furthermore, the first boundary portion, which is the boundary between the first inclined surface upright portion 11b and the first connecting portion 11c, is curved in an arc shape, and a U-shaped ring portion 11r, which serves as the main rope attachment portion of the present invention, is provided at this first boundary portion. Furthermore, the boundary portion between the first inclined surface fixing portion 11a and the first inclined surface upright portion 11b is also curved in an arc shape.

[0027] The second pipe 12, like the first pipe 11, is formed by bending a single cylindrical metal pipe into a roughly U-shape, and has the same shape and structure as the first pipe 11. In other words, the second pipe 12 consists of a second inclined surface fixing part 12a, the same as the first inclined surface fixing part 11a, a second inclined surface upright part 12b, the same as the first inclined surface upright part 11b, and a second connecting part 12c, the same as the first connecting part 11c, with the second inclined surface fixing part 12a and the second connecting part 11c being continuous at both ends of the second inclined surface upright part 12b. The second inclined surface fixing portion 12a is a part that is fixed to the inclined surface 3 of the corrugated plate roof 2 so as to follow the inclined surface 3, and extends in one direction. The second inclined surface upright portion 12b extends perpendicular to the axial direction of the second inclined surface fixing portion 12a and stands upright on the second inclined surface fixing portion 12a. The second connecting portion 12c extends perpendicular to the axial direction of the second inclined surface upright portion 12b, facing the second inclined surface fixing portion 12a, and is shorter than the second inclined surface fixing portion 12a. Near the end of the second connecting portion 12c where the second inclined surface upright portion 12b is not continuous, an elongated hole 12h extending in the circumferential direction is provided. Furthermore, the second boundary portion, which is the boundary between the second inclined surface upright portion 12b and the second connecting portion 12c, is curved in an arc shape, and a U-shaped ring portion 12r, which serves as the main rope attachment portion of the present invention, is provided at this second boundary portion. Furthermore, the boundary portion between the second inclined surface fixing portion 12a and the second inclined surface upright portion 12b is also curved in an arc shape. Furthermore, the ring portion 11r may be provided at the first inclined surface upright portion 11b or the first connecting portion 11c instead of the first boundary portion, and the ring portion 12r may be provided at the second inclined surface upright portion 12b or the second connecting portion 12c instead of the second boundary portion, or only one of the ring portions 11r or 12r may be provided. Furthermore, instead of providing the ring portions 11r and 12r, a pipe clamp equipped with a ring through which a lifeline can be tied and passed, and a clamp for gripping the pipe, may be attached to the first connecting portion 11c of the first pipe 11 or the second connecting portion 12c of the second pipe 12, and this may be used as the lifeline attachment portion.

[0028] The connecting pipe 13 consists of a cylindrical metal inner pipe 13b with a shorter cylindrical metal outer pipe 13a inserted and fixed to the outside of the inner pipe 13b. One side of the portion of the inner pipe 13b that protrudes from the outer pipe 13a (one side in the longitudinal direction of the connecting pipe 13) becomes the first fitting portion 13b1, and the other side (the other side in the longitudinal direction of the connecting pipe 13) becomes the second fitting portion 13b2. As shown in Figures 7 and 9, connecting springs 14 and 15 are attached to the inside of the first fitting portion 13b1 and the second fitting portion 13b2, respectively. The connecting spring 14 consists of a U-shaped spring plate 14a and a projection 14p. The projection 14p is formed by raising tongue-shaped projections 14p1 and 14p2 that protrude outward in the short direction from the upper piece of the spring plate 14a and bending them into a V-shape. The connecting spring 15 is the same as the connecting spring 14, and consists of a U-shaped spring plate 15a and a projection 15p. The projection 15p is formed by raising tongue-shaped projections 15p1 and 15p2 that protrude outward in the short direction from the upper piece of the spring plate 15a and bending them into a V-shape. In these connecting springs 14 and 15, the tips of the upper and lower pieces move closer together and further apart due to the elastic force of the spring plates 14a and 15a, and when no force is acting, the distance between the tips of the upper and lower pieces is greater than the inner diameter of the inner pipe 13b. Then, a hole 13h1 is provided in the first fitting portion 13b1 of the inner pipe 13b, and the connecting spring 14 is inserted into the first fitting portion 13b1 by reducing the distance between the tips of its upper and lower pieces to make it smaller than the inner diameter of the inner pipe 13b, and the projection 14p is made to protrude from the hole 13h1 while the connecting spring 14 is biased, thereby attaching the connecting spring 14 to the inside of the first fitting portion 13b1. Similarly, a hole 13h2 is provided in the second fitting portion 13b2 of the inner pipe 13b. The connecting spring 15 is inserted into the second fitting portion 13b2 by reducing the distance between the tips of its upper and lower pieces to make it smaller than the inner diameter of the inner pipe 13b. With the connecting spring 15 biased, the projection 15p protrudes from the hole 13h2, thereby attaching the connecting spring 15 to the inside of the first fitting portion 13b2.

[0029] This connecting pipe 13 forms the pipe connection part of the present invention, connecting the first pipe 11 and the second pipe 12 to form the main rope support pipe 10. Specifically, the end of the first connecting portion 11c of the first pipe 11 (the open end of the first connecting portion 11c) is fitted onto the outside of the first fitting portion 13b1 of the connecting pipe 13, and the end of the second connecting portion 12c of the second pipe 12 (the open end of the second connecting portion 12c) is fitted onto the outside of the second fitting portion 13b2 of the connecting pipe 13, thereby forming the pipe connecting portion of the present invention, and thereby connecting the first pipe 11 and the second pipe 12. In this case, the inner diameter of the first connecting portion 11c of the first pipe 11 is slightly larger than the outer diameter of the first fitting portion 13b1. When the first connecting portion 11c is fitted into the first fitting portion 13b1, the first pipe 11 (first connecting portion 11c) is slidable and rotatable relative to the first fitting portion 13b1. However, the hole 13h1 of the first fitting portion 13b1 overlaps with the elongated hole 11h of the first connecting portion 11c, and the projection 14p that fits into the hole 13h1 and protrudes is inserted through the elongated hole 11h and protrudes. As a result, the axial displacement (sliding) of the first connecting portion 11c relative to the first fitting portion 13b1 is restricted, and rotation beyond a certain angle (the rotation angle at which the projection 14p can move within the elongated hole 11h) is restricted. Similarly, the inner diameter of the second connecting portion 12c of the second pipe 12 is slightly larger than the outer diameter of the second fitting portion 13b2. When the second connecting portion 12c is fitted into the second fitting portion 13b2, the second pipe 12 (second connecting portion 12c) is slidable and rotatable relative to the second fitting portion 13b2. However, the hole 13h2 of the second fitting portion 13b2 aligns with the elongated hole 12h of the second pipe 12, and the projection 15p that fits into the hole 13h2 and protrudes is inserted through the elongated hole 12h, thereby restricting the axial displacement (sliding) of the second connecting portion 12c relative to the second fitting portion 13b2, and restricting rotation beyond a certain angle (the rotation angle at which the projection 15p can move within the elongated hole 12h). Thus, the connecting pipe 13 and connecting springs 14 and 15 function to connect the first pipe 11 and the second pipe 12, and the elongated holes 11h and 12h, holes 13h1 and 13h2, and the projections 14p and 15p of the connecting springs 14 and 15 serve as means to prevent the first pipe 11 and the second pipe 12 from shifting or rotating relative to the connecting pipe 13. By attaching connecting springs 14 and 15 to the connecting pipe 13 in this way, the second pipe 12 does not easily shift or detach axially from the first pipe 11, and the rotation of the second pipe 12 relative to the first pipe 11 is restricted to a certain angle, making it easy to store, transport, and attach / detach the main rope support pipe 10 to and from the sloping surface of the roof.

[0030] Figure 10(a) is a perspective view of the main rope support pipe 10 with the first pipe 11 and the second pipe 12 closed, and Figure 10(b) is a perspective view of the main rope support pipe 10 with the first pipe 11 and the second pipe 12 open. In the main rope support pipe 10, the first pipe 11 and the second pipe 12, which are connected by a connecting pipe 13, are each rotatable relative to the connecting pipe 13. As shown in Figure 10(a), the first pipe 11 and the second pipe 12 can be rotated in a direction that brings the first inclined surface fixing part 11a and the second inclined surface fixing part 12a closer together, so that the first inclined surface fixing part 11a and the second inclined surface fixing part 12a come into contact or close together, thereby closing the first pipe 11 and the second pipe 12. When the first pipe 11 and the second pipe 12 are closed, the main rope support pipe 10 is compact and convenient for storage, transport, and relocation. Then, when installing the main rope support pipe 10, the first pipe 11 and the second pipe 12 are rotated from a closed state, as shown in Figure 10(b), so that the first inclined surface fixing part 11a and the second inclined surface fixing part 12a move away from each other, so that the first pipe 11 and the second pipe 12 are open, and the main rope support pipe 10 is installed on the inclined surface 3 of the corrugated metal roof 2.

[0031] Here, we will explain the rotation angles of the first pipe 11 and the second pipe 12. Figure 11(a) is a cross-sectional view (CC) when the first pipe 11 is rotated to the right (clockwise) as far as possible, with projection 14p at the top of the circumference of the inner pipe 13b. Figure 11(b) is a cross-sectional view (DD) when the second pipe 12 is rotated to the left (counterclockwise) as far as possible, with projection 15p at the top of the circumference of the inner pipe 13b. In the diagram, VL1 is a vertical line passing through the midpoint of projection 14p in the left-right direction, VL2 is a vertical line passing through the midpoint of projection 15p in the left-right direction, IL1 is an inclined line passing through the midpoint of the elongated hole 11h and the center of the inner pipe 13b, and IL2 is an inclined line passing through the midpoint of the elongated hole 12h and the center of the inner pipe 13b. The first pipe 11 (first connecting portion 11c) is rotatable relative to the connecting pipe 13 (first fitting portion 13b1), but its rotation is restricted by the projection 14p of the connecting spring 14 that protrudes from the hole 13h1 of the first fitting portion 13b1 and the elongated hole 11h of the first connecting portion 11c. In this case, as shown in Figure 11(a), the first pipe 11 (first connecting part 11c) can rotate clockwise until the left end of the elongated hole 11h hits the projection 14p (projection piece 14p1). If the angle between the vertical line VL1 and the inclined line IL1 is φ0 at that time, then the first pipe 11 (first connecting part 11c) can rotate clockwise relative to the connecting pipe 13 (first fitting part 13b1) until the inclined line IL1 is tilted at an angle of φ0 with respect to the vertical line VL1. The second pipe 12 (first connecting portion 12c) is also rotatable relative to the connecting pipe 13 (second fitting portion 13b2), but its rotation is restricted by the projection 15p of the connecting spring 15 that protrudes from the hole 13h2 of the second fitting portion 13b2 and the elongated hole 12h of the second connecting portion 12c. In this case, as shown in Figure 11(b), the second pipe 12 (second connecting part 12c) can rotate counterclockwise until the right end of the elongated hole 12h hits the projection 15p (projection piece 15p2), at which point the angle between the vertical line VL2 and the inclined line IL2 becomes φ0, and the second pipe 12 (second connecting part 12c) can rotate counterclockwise relative to the connecting pipe 13 (second fitting part 13b2) until the inclined line IL2 is tilted at an angle of φ0 relative to the vertical line VL2 in the opposite direction to the inclined line IL1. When the first pipe 11 rotates to its maximum right and the second pipe 12 moves to its maximum left, the opening angle φ between the first pipe 11 and the second pipe 12 (the angle between the first inclined surface upright portion 11b and the second inclined surface upright portion 12b, see Figure 3) becomes 2·φ0. Therefore, the maximum opening angle φ between the first pipe 11 and the second pipe 12 is 2·φ0.

[0032] The connecting pipe 13 may be fixed to either the first connecting section 11c or the second connecting section 12c. In that case, the first connecting portion 11c or the second connecting portion 12c, which is not fixed to the connecting pipe 13, becomes rotatable relative to the connecting pipe 13, a hole 13h1 (13h2) is provided on the rotatable side to which the connecting spring 14 (15) is attached, and an elongated hole longer than the elongated hole 11h (12h) is provided to form the anti-slip and anti-rotation means of the present invention. Alternatively, instead of the connecting pipe 13, a thicker pipe with an inner diameter slightly larger than the first connecting portion 11c and the second connecting portion 12c may be used, and the first connecting portion 11c and the second connecting portion 12c may be fitted inside this thicker pipe so that they face each other, thereby forming the pipe connecting portion of the present invention. In that case, holes 13h1 and 13h2 are provided in the first connecting portion 11c and the second connecting portion 12c, connecting springs 14 and 15 are attached to the inside of the first connecting portion 11c and the second connecting portion 12c, and elongated holes 11h and 12h are provided in the thick pipe, thereby forming the anti-slip and anti-rotation means of the present invention. This thick pipe may be fixed to either the first connecting section 11c or the second connecting section 12c. Furthermore, without using a connecting pipe, the inner diameter of the first connecting portion 11c may be made slightly larger than the outer diameter of the second connecting portion 12c, or the inner diameter of the second connecting portion 12c may be made slightly larger than the outer diameter of the first connecting portion 11c, and the first connecting portion 11c may be directly fitted into the second connecting portion 12c to form the pipe connecting portion of the present invention. In that case, a hole identical to hole 13h2 (13h1) is provided in the inner second connecting portion 12c or the first connecting portion 11c to attach the connecting spring 14 (15), and an elongated hole 11h (12h) is provided in the outer first connecting portion 11c or the second connecting portion 12c, thereby forming the anti-slip and anti-rotation means of the present invention.

[0033] [Support post fixing member] The support post fixing member 20 is for fixing the main rope support pipe 10 to the inclined surface 3 of the corrugated metal roof 2, and consists of pipe gripping and fixing members 21, 22, 23, and 24. The pipe gripping and fixing members 21, 22, 23, and 24 are provided with pipe gripping portions 21a, 22a, 23a, and 24a having a cylindrical portion and a rafter portion, L-shaped clamping plates 21b, 21c, 22b, 22c, 23b, 23c, 24b, and 24c, bolts 21d, 22d, 23d, and 24d, and nuts 21e, 22e, 23e, and 24e. Bolt holes 21ah, 21bh, 21ch, 22ah, 22bh, 22ch, 23ah, 23bh, 23ch, 24ah, 24bh, and 24ch are provided in the rafter portion of the pipe gripping portions 21a, 22a, 23a, and 24a, and in the upright portions of the clamping plates 21b, 21c, 22b, 22c, 23b, 23c, 24b, and 24c. The pipe gripping and fixing members 21 and 22 constitute the first pipe gripping and fixing members of the present invention, and fix the first inclined surface fixing portion 11a of the first pipe 11 to the seam 5a of the peak portion 4a of the inclined surface 3. Specifically, in the pipe gripping and fixing member 21, the cylindrical portion of the pipe gripping part 21a is inserted into the tip side (opening side) of the first inclined surface fixing part 11a, the clamping plates 21b and 21c are placed on the upper surface of the ridge portion 4a, the seam 5a is clamped between their upright portions, and nuts 21e are screwed onto bolts 21d that are inserted through bolt holes 21ah, 21bh, and 21ch and tightened. As a result, the pipe gripping portion 21a, which grips the tip of the first inclined surface fixing portion 11a, is clamped and fixed to the seam 5a by clamping plates 21b, 21c and bolts 21d and nuts 21e. Similarly, in the pipe gripping and fixing member 22, the cylindrical portion of the pipe gripping part 22a is inserted into the first inclined surface upright portion 11b side of the first inclined surface fixing part 11a, the clamping plates 22b and 22c are placed on the upper surface of the peak portion 4a, the seam 5a is clamped in its upright portion, and nuts 22e are screwed onto bolts 22d inserted through bolt holes 22ah, 22bh, and 22ch and tightened. As a result, the pipe gripping portion 22a, which grips the first inclined surface upright portion 11b side of the first inclined surface fixing portion 11a, is clamped and fixed to the seam 5a by clamping plates 22b, 22c and bolts 22d and nuts 22e. The first inclined surface fixing portion 11a may be fixed to the inclined surface 3 by either the pipe gripping fixing members 21 or 22 alone, or by three or more pipe gripping fixing members, which may be added to the pipe gripping fixing members 21 and 22.

[0034] Furthermore, the pipe gripping and fixing members 23 and 24 become the second pipe gripping and fixing members of the present invention, and fix the second inclined surface fixing portion 12a of the second pipe 12 to the seam 5b of the peak portion 4b of the inclined surface 3. Specifically, in the pipe gripping and fixing member 23, the cylindrical portion of the pipe gripping part 23a is inserted into the second inclined surface upright portion 12b side of the second inclined surface fixing part 12a, the clamping plates 23b and 23c are placed on the upper surface of the peak portion 4b, the seam 5b is clamped in place by the upright portion, and nuts 23e are screwed onto bolts 23d that are inserted through bolt holes 23ah, 23bh, and 23ch and tightened. As a result, the pipe gripping portion 23a, which grips the second inclined surface upright portion 12b side of the second inclined surface fixing portion 12a, is clamped and fixed to the seam 5b by clamping plates 23b, 23c and bolts 23d and nuts 23e. Similarly, in the pipe gripping and fixing member 24, the cylindrical portion of the pipe gripping part 24a is inserted into the tip side (opening side) of the second inclined surface fixing part 12a, the clamping plates 24b and 24c are placed on the upper surface of the ridge portion 4b, the seam 5b is clamped between their upright portions, and nuts 24e are screwed onto bolts 24d that are inserted through bolt holes 24ah, 24bh, and 24ch and tightened. As a result, the pipe gripping portion 24a, which grips the tip of the second inclined surface fixing portion 12a, is clamped and fixed to the seam 5b by clamping plates 24b, 24c and bolts 24d and nuts 24e. Furthermore, the fixing of the second inclined surface fixing part 12a to the inclined surface 3 may be done by either the pipe gripping fixing members 23 and 24 alone, similar to the fixing of the first inclined surface fixing part 11a to the inclined surface 3, or it may be done by three or more pipe gripping fixing members, including the pipe gripping fixing members 23 and 24 plus one or more additional pipe gripping fixing members.

[0035] [Main rope tensioning structure using main rope support post 1] Figure 12 is a perspective view showing a part of a lifeline tensioning structure in which lifelines are stretched between multiple lifeline support posts 1, etc., which are installed at intervals on the inclined surface 3 of a corrugated metal roof 2. In the figure, 1A is the main rope tensioning structure, 1' is the main rope support, 3a', 3b', 3c' are the valleys, 4a', 4b' are the peaks, 5a', 5b' are the seams, 10' is the pipe for the main rope support, 11' is the first pipe, 11a' is the first inclined surface fixing part, 11b' is the first inclined surface upright part, 11c' is the first connecting part, 11r' is the ring part, 12' is the second pipe, 12a' is the second inclined surface fixing part, 12b' is the second inclined surface upright part, 12c' is the second connecting part, 12r' is the ring part, 21', 22', 23', 24' are the pipe gripping and fixing members, and MR1 and MR2 are the main ropes. In the figure, the same reference numerals are used for parts that are the same as those shown in Figure 1. The inclined surface 3 of the corrugated metal roof 2 has numerous alternating valleys and peaks, with the valleys 3a', 3b', 3c' and peaks 4a', 4b' located several meters (2 to 10 meters) away from the valleys 3a, 3b, 3c and peaks 4a, 4b. On the upper surfaces of the mountain sections 4a' and 4b', the same type of seams 5a' and 5b' as those on mountain sections 4a and 4b are formed: 5a' and 5b'. The lifeline tensioning structure 1A comprises lifeline support posts 1 and 1' installed at intervals on the sloping surface 3 of the roof 2, and lifelines MR1 ​​and MR2 stretched between the lifeline support posts 1 and 1'. The main rope support post 1' is the same as the main rope support post 1, and is equipped with a main rope support post pipe 10' and pipe gripping and fixing members 21', 22', 23', and 24'. The main rope support pipe 10' is the same as the main rope support pipe 10, and is equipped with the same connecting pipe as the first pipe 11', the second pipe 12', and the connecting pipe 13. The first pipe 11' is the same as the first pipe 11, and consists of a first inclined surface fixing portion 11a', a first inclined surface upright portion 11b', and a first connecting portion 11c', with a ring portion 11r' provided at the boundary between the first inclined surface upright portion 11b' and the first connecting portion 11c'. The second pipe 12' is the same as the second pipe 12, and consists of a second inclined surface fixing portion 12a', a second inclined surface upright portion 12b', and a second connecting portion 12c', with a ring portion 12r' provided at the boundary between the second inclined surface upright portion 12b' and the second connecting portion 12c'.

[0036] The pipe gripping and fixing members 21', 22', 23', and 24' are the same as the pipe gripping and fixing members 21, 22, 23, and 24 of the main rope support pipe 10, and fix the main rope support pipe 10' to the inclined surface 3. Specifically, the pipe gripping and fixing members 21' and 22' fix the first inclined surface fixing portion 11a' of the first pipe 11' to the seam 5a' of the peak portion 4a' of the inclined surface 3, and the pipe gripping and fixing members 23' and 24' fix the second inclined surface fixing portion 12'a of the second pipe 12' to the seam 5b' of the peak portion 4b' of the inclined surface 3. As a result, the main rope support 1' is fixed to the sloping surface 3 of the roof 2 at a position several meters (2 to 10 meters) away from the main rope support 1. Then, the main rope MR1 is passed through the ring portion 11r of the first pipe 11 and the ring portion 11r' of the first pipe 11', and the main rope MR2 is passed through the ring portion 12r of the second pipe 12 and the ring portion 12r' of the second pipe 12', forming a main rope tensioning structure 1A in which the main ropes MR1 ​​and MR2 are stretched between the main rope support posts 1 and 1'. Furthermore, the lifeline stretched between lifeline posts 1 and 1' may consist of only one of lifelines MR1 ​​or MR2. Furthermore, the lifeline tensioning structure of the present invention may also include, in addition to lifeline support posts 1 and 1', one or more additional lifeline support posts identical to lifeline support post 1 (1') installed several meters (2 to 10 meters) away from lifeline support post 1 (1'), and lifelines MR1 ​​and MR2 may be passed through the ring portion of the newly installed lifeline support posts in a manner that secures them.

[0037] Figure 13 is a view from the Sv direction (perpendicular to the inclined surface 3) of the lifeline tensioning structure 1A shown in Figure 12, where a force P acts in the Sh direction (direction of inclination of the inclined surface 3) on the center between lifeline support posts 1 and 1' of the lifeline MR2. In the figure, VL is a vertical line perpendicular to the inclined surface 3 passing through the center positions of the pipe gripping and fixing members 21 to 24, and VL' is a vertical line perpendicular to the inclined surface 3 passing through the center positions of the pipe gripping and fixing members 21' to 24'. In the lifeline tensioning structure 1A, the lifeline MR2, which is stretched between lifeline support posts 1 and 1', has the hook portion of a safety harness worn by a worker attached to it, and various forces act on the lifeline MR2 from the hook portion of the safety harness. For example, as shown in Figure 13, when a force P acts in the Sh direction (the inclination direction of the inclined surface 3) on the center between the main rope support posts 1 and 1' of the main rope MR2, the tension T of the main rope MR2 acts on the ring portion 12r of the main rope support post 1, and the tension T' (=T) of the main rope MR2 acts on the ring portion 12r' of the main rope support post 1'. In this case, the position of the ring portion 12r on the main rope support post 1 is away from the vertical line VL, and the tension T acting on the ring portion 12r causes a moment to act on the main rope support post pipe 10 that tries to rotate the main rope support post pipe 10 counterclockwise around the vertical line VL, and as a result a force acts on the pipe gripping and fixing members 21 to 24 that tries to release the fixing to the seams 5a and 5b. In the main rope support post 1', the position of the ring portion 12r' is away from the vertical line VL', and the tension T' acting on the ring portion 12r' causes a moment to act on the main rope support pipe 10' that tries to rotate the main rope support pipe 10' clockwise around the vertical line VL', and as a result, a force acts on the pipe gripping and fixing members 21'~24' that tries to release the fixing to the seams 5a' and 5b'. Furthermore, if the hook portion of a safety harness worn by a worker is attached to the main rope MR1 stretched between the main rope support posts 1 and 1', various forces act on the main rope MR1 from the hook portion of the safety harness, the tension of the main rope MR1 acts on the ring portion 11r of the main rope support post 1, and the tension of the main rope MR1 acts on the ring portion 11r' of the main rope support post 1'. In this case, at the main rope support post 1, the position of the main rope support post 1 is away from the vertical line VL, and just as when the tension of the main rope MR2 acts on the ring portion 12r, the tension of the main rope MR1 acting on the ring portion 11r causes a force to act on the pipe gripping and fixing members 21-24 that attempts to release the fixing to the seams 5a and 5b. Even in the main rope support post 1', the position of the ring portion 11r' is away from the vertical line VL', and just as when the tension of the main rope MR2 acts on the ring portion 12r', the tension of the main rope MR1 acting on the ring portion 11r' exerts a force on the pipe gripping and fixing members 21'~24' that attempts to release the fixation to the seams 5a' and 5b'. Furthermore, the tension acting on the main rope MR1 (MR2) as described above causes a moment that attempts to rotate the main rope support pipes 10 and 10' around the vertical lines VL and VL', which increases as the distance between the ring sections 11r (12r) and 11r' (12r') and the vertical lines VL and VL' increases. Therefore, it is desirable to minimize the distance between the ring portions 11r(12r), 11r'(12r') and the vertical lines VL, VL' so that the pipe gripping and fixing members 21~24, 21'~24' do not easily detach from the seams 5a, 5b, 5a', 5b'.

[0038] [Pipe for lifeline support post with ring-attached pipe] As described above, when a lifeline support 1 is provided by fixing a lifeline support pipe 10 having ring portions 11r and 12r to an inclined surface 3, and lifelines MR1 ​​and MR2 are attached to the ring portions 11r and 12r, the tension of lifelines MR1 ​​and MR2 acting on the ring portions 11r and 12r causes a moment to act on the lifeline support pipe 10 that tends to rotate it around the vertical line VL, making it easier for the pipe gripping and fixing members 21 to 24 to come loose from fixing to the seams 5a and 5b. Therefore, it is conceivable to install a lifeline support using a lifeline support pipe that has a ring-attached pipe that does not generate the above-mentioned moment even when a lifeline is attached. Figure 14 shows a perspective view (Figure (a)), a plan view (Figure (b)), and a front view (Figure (b)) of a short pipe with a ring used for a lifeline support pipe to which a lifeline is attached. Figure 15(a) is a perspective view of the lifeline support pipe with the short pipe with a ring shown in Figure 14 attached in a closed state. Figure 15(b) is a perspective view of the lifeline support pipe with the short pipe with a ring attached shown in Figure 14 in an open state. Figure 16 is a plan view of the lifeline support pipe shown in Figure 15(b). Figure 17 is an enlarged view of section A' in Figure 16. Figure 18(a) is a cross-sectional view of section EE in Figure 17. Figure 18(b) is a cross-sectional view of section FF in Figure 17. In the diagram, 30 is the main rope support pipe, 31 is the first pipe, 31a is the first inclined surface fixing part, 31b is the first inclined surface upright part, 31c is the first connecting part, 31h is the elongated hole, 32 is the second pipe, 32a is the second inclined surface fixing part, 32b is the second inclined surface upright part, 32c is the second connecting part, 32h is the elongated hole, 40 is the short pipe with a ring, 41 is the short pipe part, and 42 and 43 are the ring parts. The same reference numerals are used for parts identical to the main rope support pipe 10 shown in Figures 1 to 10. As shown in Figures 14 to 18, the main rope support pipe 30 comprises a first pipe 31, a second pipe 32, a connecting pipe 13, and a short pipe 40 with a ring. The first pipe 31 is obtained by removing the ring portion 11r from the first pipe 11 of the main rope support pipe 10, and consists of a first inclined surface fixing portion 31a, a first inclined surface upright portion 31b, and a first connecting portion 31c, which are the same as the first inclined surface fixing portion 11a, the first inclined surface upright portion 11b, and the first connecting portion 11c is provided with an elongated hole 31h, the same as the elongated hole 11h. The second pipe 32 is obtained by removing the ring portion 12r from the second pipe 12 of the main rope support pipe 10, and consists of a second inclined surface fixing portion 32a, a second inclined surface upright portion 32b, and a second connecting portion 32c, which are the same as the second inclined surface fixing portion 12a, the second inclined surface upright portion 12b, and the second connecting portion 12c, and the second connecting portion 32c is provided with the same elongated hole 32h as the elongated hole 12h. Then, in the same manner as the main rope support pipe 10, the first pipe 31 and the second pipe 32 are connected by a connecting pipe 13, and connecting springs 14 and 15 are attached to the inside of the connecting pipe 13.

[0039] As shown in Figure 14, the ringed short pipe 40 consists of a cylindrical metal short pipe section 41 and U-shaped ring sections 42 and 43. The ring sections 42 and 43 are attached to the outer surface of the short pipe section 41, facing each other at the axial center, and serve as the main rope attachment section. The ringed short pipe 40 is then attached to the pipe connection portion of the main rope support pipe 30 (the pipe connection portion of the first pipe 31 and the second pipe 32 connected by the connecting pipe 13, hereinafter referred to as the "main rope support pipe 30 connection portion"). In other words, the inner diameter of the short pipe section 41 is slightly larger than the outer diameters of the first pipe 31 and the second pipe 32, and slightly larger than the outer diameter of the outer pipe 13a of the connecting pipe 13, and the axial length of the short pipe section 41 is shorter than the distance between the elongated holes 31h and 32h in the connecting section of the main rope support pipe 30. As a result, the short pipe section 41 is fitted onto the outside of the main rope support pipe 30 connection section, straddling the first connection section 31c, the outer pipe 13a, and the second connection section 32c, so that the ringed short pipe 40 is attached to the main rope support pipe 30 connection section, and the short pipe section 41 is positioned in the axial direction between the elongated hole 31h of the first pipe 31 and the elongated hole 32h of the second pipe 32. In this case, the ringed short pipe 40 is rotatable relative to the outer pipe 13a, etc., at the connection point to the main rope support pipe 30, but axial sliding is restricted by the projections 14p and 15p of the connecting springs 14 and 15 that protrude outward from the elongated holes 31h and 32h.

[0040] In the main rope support pipe 30 equipped with a ringed short pipe 40, the first pipe 31 and the second pipe 32, which are connected by a connecting pipe 13, are rotatable relative to the connecting pipe 13, similar to the main rope support pipe 10. As shown in Figure 15(a), the first pipe 51 and the second pipe 52 are rotated in a direction that brings the first inclined surface fixing part 31a and the second inclined surface fixing part 32a closer together, so that the first inclined surface fixing part 31a and the second inclined surface fixing part 32a come into contact or close together, and the first pipe 31 and the second pipe 32 can be closed. When closed, the main rope support pipe 30 is just as compact as the main rope support pipe 10 when closed, making it convenient for storage, transport, and relocation. Then, when installing the main rope support pipe 30, the first pipe 31 and the second pipe 32 are rotated from a closed state, as shown in Figure 15(b), so that the first inclined surface fixing part 31a and the second inclined surface fixing part 32a move away from each other, so that the first pipe 31 and the second pipe 32 are in an open state, and the main rope support pipe 30 is installed on the inclined surface 3 of the corrugated metal roof 2. The installation of the main rope support pipe 30 onto the inclined surface 3 is the same as the installation of the main rope support pipe 10 onto the inclined surface 3. Specifically, the pipe gripping and fixing members 21 and 22 fix the first inclined surface fixing portion 31a of the first pipe 31 to the seam 5a of the peak portion 4a of the inclined surface 3, and the pipe gripping and fixing members 23 and 24 fix the second inclined surface fixing portion 32a of the second pipe 32 to the seam 5b of the peak portion 4b of the inclined surface 3.

[0041] [A lifeline tensioning structure using a lifeline support post equipped with a lifeline support pipe 30] Figure 19 is a perspective view showing a part of a lifeline tensioning structure in which lifelines are stretched between multiple lifeline support posts equipped with lifeline support pipes 30, etc., which are installed at intervals on the inclined surface 3 of a corrugated metal roof 2. In the figure, 1B is the lifeline tensioning structure, 1P and 1P' are lifeline supports, 30' is the pipe for the lifeline support, 31' is the first pipe, 31a' is the first inclined surface fixing part, 31b' is the first inclined surface upright part, 31c' is the first connecting part, 32' is the second pipe, 32a' is the second inclined surface fixing part, 32b' is the second inclined surface upright part, 32c' is the second connecting part, 40' is the short pipe with a ring, 42' and 43' are the ring parts, and MR3, MR4, and MR5 are lifelines. In the figure, the same reference numerals are used for parts that are the same as those shown in Figure 12. The lifeline tensioning structure 1B comprises lifeline support posts 1P and 1P' installed at intervals on the sloping surface 3 of the roof 2, and lifelines MR3, MR4, and MR5 stretched between the lifeline support posts 1P and 1P'. The main rope support post 1P is equipped with a main rope support pipe 30 and pipe gripping and fixing members 21, 22, 23, and 24 for fixing the main rope support pipe 30 to the seams 5a and 5b, while the main rope support post 1P' is equipped with a main rope support pipe 30' and pipe gripping and fixing members 21', 22', 23', and 24' for fixing the main rope support pipe 30' to the seams 5a' and 5b'. The main rope support pipe 30' is the same as the main rope support pipe 30, and is equipped with the first pipe 31', the second pipe 32', the same connecting pipe as the connecting pipe 13, and the short pipe 40' with a ring. The first pipe 31' is the same as the first pipe 31 and consists of a first inclined surface fixing portion 31a', a first inclined surface upright portion 31b', and a first connecting portion 31c'. The second pipe 32' is the same as the second pipe 32, and consists of a second inclined surface fixing portion 32a', a second inclined surface upright portion 32b', and a second connecting portion 32c'. The ringed short pipe 40' is the same as the ringed short pipe 40, and consists of a short pipe section 41' and U-shaped ring sections 42' and 43', and is attached to the pipe connection section of the main rope support pipe 30'. In the lifeline tensioning structure 1B, one end of the lifeline MR3 is attached to the ring portion 43 of the lifeline support pipe 30, and the other end of the lifeline MR3 is attached to the ring portion 42' of the lifeline support pipe 30', thereby tensioning the lifeline MR3 between the lifeline supports 1P and 1P'. Furthermore, one end of the lifeline MR4 is attached to the ring portion 42 of the lifeline support pipe 30, and the other end of the lifeline MR4 is attached to the ring portion of the lifeline support pipe to its left, so that the lifeline MR4 is stretched between the lifeline support 1P and the lifeline support to its left. Furthermore, one end of the lifeline MR5 is attached to the ring portion 43' of the lifeline support pipe 30', and the other end of the lifeline MR5 is attached to the ring portion of the lifeline support pipe to the right, so that the lifeline MR5 is stretched between the lifeline support 1P' and the lifeline support to the right.

[0042] Figure 20 is a view from the Sv direction (perpendicular to the inclined surface 3) of the lifeline tensioning structure 1B shown in Figure 19, where a force P acts in the Sh direction (direction of inclination of the inclined surface 3) on the center between lifeline supports 1P and 1P' of the lifeline MR3. The same reference numerals are used for elements identical to those shown in Figure 13. In the lifeline tensioning structure 1A, similar to the lifeline tensioning structure 1B, the lifeline MR3, which is stretched between lifeline support posts 1P and 1P', has the hook portion of a safety harness worn by a worker attached to it, and various forces act on the lifeline MR3 from the hook portion of the safety harness. For example, as shown in Figure 20, when a force P acts in the Sh direction (the inclination direction of the inclined surface 3) on the center between the main rope support posts 1P and 1P' of the main rope MR3, the tension T of the main rope MR3 acts on the ring portion 43 of the main rope support post 1P, and the tension T' (=T) of the main rope MR3 acts on the ring portion 42' of the main rope support post 1P'. In this case, unlike the ring portions 11r and 12r of the main rope support 1, the position of the ring portion 43 in the main rope support 1P is close to the vertical line VL, and the tension T acting on the ring portion 43 causes almost no moment to rotate the main rope support pipe 30 around the vertical line VL, and this moment causes almost no force to detach the pipe gripping and fixing members 21-24 from the seams 5a and 5b. In the main rope support post 1P', unlike the ring portions 11r' and 12r' of the main rope support post 1', the position of the ring portion 42' is close to the vertical line VL', and the tension T' acting on the ring portion 42' causes almost no moment to rotate the main rope support pipe 30' around the vertical line VL', and this moment causes almost no force to try to detach the pipe gripping and fixing members 21'~24' from the seams 5a' and 5b'. Therefore, in the lifeline tensioning structure 1B, even if an excessive force is applied to the lifeline MR3, the lifeline support pipes 30 and 30' are less likely to detach from the seams 5a, 5b, 5a', and 5b' compared to when an excessive force is applied to the lifelines MR1 ​​and MR2 in the lifeline tensioning structure 1A.

[0043] As described above, the main rope support pipes 10 and 30 comprise first pipes 11 and 31 and second pipes 12 and 32. The first pipes 11 and 31 are roughly U-shaped pipes having first inclined surface fixing parts 11a and 31a, first inclined surface upright parts 11b and 31b, and first connecting parts 11c and 31c. The first inclined surface fixing parts 11a and 31a are parts that are fixed to the inclined surface 3 so as to follow the inclined surface 3, and the first inclined surface upright parts 11b and 31b are the axes of the first inclined surface fixing parts 11a and 31a. The first connecting parts 11c and 31c extend perpendicular to the linear direction and stand upright on the first inclined surface fixing parts 11a and 31a, and are opposite to the first inclined surface fixing parts 11a and 31a and extend perpendicular to the axial direction of the first inclined surface upright parts 11b and 31b, and the second pipes 12 and 32 are substantially U-shaped pipes having second inclined surface fixing parts 12a and 32a, second inclined surface upright parts 12b and 32b and second connecting parts 12c and 32c, and the second inclined surface fixing parts 12a and 32a are aligned with the inclined surface 3 The first connecting parts 11c, 31c and the second connecting parts 12c, 32c are connected by a connecting pipe 13. When the lifeline support pipes 10 and 30 are fixed to the inclined surface 3, even if excessive force is applied to the lifeline attached to the lifeline support pipes 10 and 30, the lifeline support pipe 10 is less likely to deform, and the parts that fix the first inclined surface fixing parts 11a and 31a and the second inclined surface fixing parts 12a and 32a to the inclined surface 3 will not shift, come off, or break. The lifeline support pipes 10 and 30 have a simple structure and are cost-effective, and the lifeline support pipe 10 can be easily attached to and removed from the inclined surface 3. Furthermore, the lifeline support posts 1 and 1P are equipped with lifeline support pipes 10 and 30 and support post fixing members 20. The support post fixing members 20 consist of pipe gripping and fixing members 21, 22, 23, and 24. The pipe gripping and fixing members 21 and 22 fix the first inclined surface fixing parts 11a and 31a of the first pipes 11 and 31 to the inclined surface 3, and the pipe gripping and fixing members 23 and 24 fix the second inclined surface fixing parts 12a and 32a of the second pipes 12 and 32 to the inclined surface 3. As a result, even if excessive force is applied to the lifeline attached to the lifeline support pipes 10 and 30, the lifeline support pipe 10 is less likely to deform, and the fixing parts of the support post fixing members 20 to the inclined surface 3 will not shift, come off, or break. Therefore, the lifeline support posts 1 and 1P have a simple structure and are cost-effective, and are easy to attach and detach from the inclined surface 3. [Industrial applicability]

[0044] The lifeline support pipe, lifeline support, and lifeline tensioning structure of the present invention are resistant to deformation even when excessive force is applied to the lifeline, the parts fixed to the roof surface do not shift, detach, or break, the structure is simple and inexpensive, installation and removal are easy, and it can be used for lifeline support installed on sloped roofs. [Explanation of Symbols]

[0045] 1, 1', 1P, 1P' Main rope support 1A, 1B Main rope tensioning structure, 2. Corrugated metal roof 3 Slope 3a, 3b, 3c, 3a', 3b', 3c' Tanibe 4a, 4a', 4b, 4b' Yamabe 5a, 5a', 5b, 5b' Goby 10, 10' Main rope support pipe 11, 11' First pipe 11a, 11b' 1st inclined surface fixing part 11b, 11b' 1st inclined surface standing part 11c, 11c' 1st connection part 11h long hole 11r, 11r' ring section 12, 12' Second pipe 12a, 12a' 2nd inclined surface fixing part 12b, 12b' 2nd inclined surface standing part 12c, 12c' 2nd connection part 12h long hole 12r, 12r' ring section 13 connecting pipes 13a Outer pipe 13b Inner pipe 13b1 First insertion part 13b2 Second insertion part 13h1, 13h2 holes 14, 15 Connecting springs 14a, 15a Spring Plate 14p, 15p protrusion 14p1, 14p2, 15p1, 15p2 protruding piece 20 Support column fixing member 21, 21', 22, 22', 23, 23', 24, 24' Pipe gripping and fixing member 21a, 22a, 23a, 24a Pipe gripping section 21b, 21c, 22b, 22c, 23b, 23c, 24b, 24c clamp plate 21ah, 21bh, 21ch, 22ah, 22bh, 22ch, 23ah, 23bh, 23ch, 24ah, 24bh, 24ch Bolt holes 21d, 22d, 23d, 24d bolts 21e, 22e, 23e, 24e nuts 30 Pipes for supporting the main rope 31, 31' First pipe 31a, 31a' 1st inclined surface fixing part 31b, 31b' 1st inclined surface standing part 31c, 31c' 1st connection part 31h long hole 32, 32' Second pipe 32a, 32a' 2nd inclined surface fixing part 32b, 32b' 2nd inclined surface standing part 32c, 32c' 2nd connection part 32h long hole 40, 40' Short pipe with ring 41 Short pipe section 42, 42', 43, 43' Ring section MR1, MR2, MR3, MR4, MR5 Main rope A vertical line passing through the midpoint of projection 14p in the left-right direction of VL1. A vertical line passing through the midpoint of projection 15p in the left-right direction of VL2. IL1 An inclined line passing through the midpoint of the elongated hole 11h and the center of the inner pipe 13b. IL2 An inclined line passing through the midpoint of the elongated hole 12h and the center of the inner pipe 13b.

Claims

1. A pipe for a lifeline support, used for lifeline support posts installed on the sloping surface of a metal roof, A first pipe having a substantially U-shaped form, comprising: a first inclined surface fixing portion fixed to the inclined surface so as to follow the inclined surface; a first inclined surface upright portion that is continuous with the first inclined surface fixing portion and extends perpendicular to the axial direction of the first inclined surface fixing portion and stands upright on the first inclined surface; and a first connecting portion that faces the first inclined surface fixing portion and extends perpendicular to the axial direction of the first inclined surface upright portion, A second pipe having a substantially U-shaped configuration, comprising: a second inclined surface fixing portion fixed to the inclined surface so as to follow the inclined surface; a second inclined surface upright portion that is continuous with the second inclined surface fixing portion and extends perpendicular to the axial direction of the second inclined surface fixing portion, and a second connecting portion that faces the second inclined surface fixing portion and extends perpendicular to the axial direction of the second inclined surface upright portion; Equipped with, A pipe for supporting a main rope, characterized in that the first connecting portion and the second connecting portion are connected by a pipe connecting portion.

2. The pipe for supporting a main rope post according to claim 1, characterized in that the pipe connection portion is provided with a means to prevent the first pipe from shifting relative to the second pipe in the axial direction of the first connection portion and the first pipe from rotating relative to the second pipe by more than a certain angle.

3. The pipe connecting portion is formed such that the end of the first connecting portion is fitted into one longitudinal side of the connecting pipe, and the end of the second connecting portion is fitted into the other longitudinal side of the connecting pipe, as described in claim 1 or 2.

4. The pipe for a lifeline support post according to claim 1, characterized in that a lifeline attachment portion for attaching a lifeline is provided at the first boundary portion which is the boundary between the first inclined surface upright portion and the first connecting portion and / or the second boundary portion which is the boundary between the second inclined surface upright portion and the second connecting portion.

5. The pipe for a lifeline support post according to claim 1, characterized in that a lifeline attachment portion for attaching a lifeline is provided at the axial center of the pipe connection portion.

6. The pipe for a lifeline support post according to claim 1, characterized in that a short pipe with a ring is attached to the pipe connecting portion, and a ring for attaching a lifeline is provided on the short pipe with a ring.

7. A lifeline support comprising a lifeline support pipe and a support fixing member for fixing the lifeline support pipe to the sloping surface of a metal roof, The aforementioned pipe for supporting the main rope is, A first pipe having a substantially U-shaped form, comprising: a first inclined surface fixing portion fixed to the inclined surface so as to follow the inclined surface; a first inclined surface upright portion that is continuous with the first inclined surface fixing portion and extends perpendicular to the axial direction of the first inclined surface fixing portion and stands upright on the first inclined surface; and a first connecting portion that faces the first inclined surface fixing portion and is continuous with the first inclined surface upright portion and extends perpendicular to the axial direction of the first inclined surface upright portion, A second pipe having a substantially U-shaped configuration, comprising: a second inclined surface fixing portion fixed to the inclined surface so as to follow the inclined surface; a second inclined surface upright portion that is continuous with the second inclined surface fixing portion and extends perpendicular to the axial direction of the second inclined surface fixing portion and stands upright on the second inclined surface; and a second connecting portion that faces the second inclined surface fixing portion and extends perpendicular to the axial direction of the second inclined surface upright portion. Equipped with, The aforementioned support column fixing member is A first pipe gripping and fixing member that fixes the first inclined surface fixing portion to the inclined surface, Second pipe gripping and fixing member for fixing the second inclined surface fixing part to the inclined surface Equipped with, A lifeline support post characterized in that the first connecting portion and the second connecting portion are connected by a pipe connecting portion.

8. A lifeline tensioning structure comprising a plurality of lifeline support posts installed at intervals on the sloping surface of a metal roof, and lifelines stretched between the plurality of lifeline support posts, Each of the aforementioned plurality of lifeline support posts is equipped with a lifeline support post pipe and a support post fixing member for fixing the lifeline support post pipe to the inclined surface. The aforementioned pipe for supporting the main rope is, A first pipe having a substantially U-shaped form, comprising: a first inclined surface fixing portion fixed to the inclined surface so as to follow the inclined surface; a first inclined surface upright portion that is continuous with the first inclined surface fixing portion and extends perpendicular to the axial direction of the first inclined surface fixing portion and stands upright on the first inclined surface; and a first connecting portion that faces the first inclined surface fixing portion and is continuous with the first inclined surface upright portion and extends perpendicular to the axial direction of the first inclined surface upright portion, A second pipe having a substantially U-shaped configuration, comprising: a second inclined surface fixing portion fixed to the inclined surface so as to follow the inclined surface; a second inclined surface upright portion that is continuous with the second inclined surface fixing portion and extends perpendicular to the axial direction of the second inclined surface fixing portion and stands upright on the second inclined surface; and a second connecting portion that faces the second inclined surface fixing portion and extends perpendicular to the axial direction of the second inclined surface upright portion. Equipped with, The aforementioned support column fixing member is A first pipe gripping and fixing member that fixes the first inclined surface fixing portion to the inclined surface, Second pipe gripping and fixing member for fixing the second inclined surface fixing part to the inclined surface Equipped with, A lifeline tensioning structure characterized in that the first connecting portion and the second connecting portion are connected by a pipe connecting portion, the first inclined surface fixing portion is fixed to the inclined surface by the first pipe gripping and fixing member, and the second inclined surface fixing portion is fixed to the inclined surface by the second pipe gripping and fixing member.

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