JP7202135B2 - How to install the main rope - Google Patents

Description

The present invention relates to a method for installing a main rope on the roof of a building.

When constructing a new building such as a house or performing maintenance work on an existing building, workers may climb onto the roof. In this case, a main rope should be stretched on the roof in advance, and the worker should secure the safety of climbing the ladder and working on the roof by connecting the safety belt he/she wears to the main rope. can be done.

Specifically, for example, in the conventional example, a single master rope is stretched in the lateral direction of the gable roof, and a safety belt is connected to the master rope. Further, in Patent Document 1, two master ropes are stretched crosswise on a hipped roof, and safety belts are connected to the master ropes.

JP-A-2002-13294

However, in the conventional example, since only one main rope is stretched, for example, when a worker falls in a direction orthogonal to the length direction of the main rope and a strong force is applied in the direction orthogonal to the length direction. , there is a concern that the master rope may shift in the orthogonal direction and wobble in the direction.

On the other hand, in Patent Document 1, the two main ropes are stretched crosswise, so there is no such concern. Therefore, the two main ropes must be connected to each other, taking great care not to fall. Therefore, the connection work is very troublesome.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to install the main ropes so as not to slip off and to eliminate the need to connect the main ropes together on the roof. Make it the main issue.

Hereinafter, effective means for solving the above problems will be described while indicating the action, effect, etc. as necessary. In the following, for ease of understanding, reference numerals indicating corresponding configurations are shown in parentheses in the drawings, but the present invention is not limited to the specific configurations and shapes shown in the drawings.

The first invention includes a plurality of master ropes (30, 40), and the master ropes (30, 40) are connected to each other to form a joint (J), whereby the joint (J ) at the base ends of at least three ropes (31, 32, 43, 44) are formed. ) from a position lower than the roof (85) to the roof (85), and at least three ropes (31, 32, 43, 44) are lifted onto a plane a rope installation step (s5, s6) for installing the rope so that it is radially expanded from the joint (J) raised above the roof (85) by sight. .

According to the first invention, since at least three ropes (31, 32, 43, 44) are installed so as to extend radially from the joint (J) in a plan view, one parent The main ropes (30, 40) can be installed with less deviation than the usual case where the ropes are installed linearly in plan view. Moreover, since a part of the parent rope complex (X) with the joint (J) formed thereon, including the joint (J), is lifted onto the roof (85), the master ropes (30, 40) are connected to each other. There is no need to do work on the roof (85).

A second invention comprises one master rope (30) and another master rope (40), wherein the intermediate part of the one master rope (30) and the intermediate part of the other master rope (40) Part of the parent rope complex (X), in which the joint (J) is formed by connecting A connecting portion lifting step (s3, s4) for lifting onto the roof (85); ) are installed so that both ends are fixed around the building (80), and after the one master rope installation step (s5), the other A second master rope installation step (s6) for installing a master rope (40) so as to form a predetermined angle with respect to the one master rope (30) in plan view.

According to the second invention, the first invention can be implemented simply. And the same effect as the first invention can be obtained. Specifically, since the other master rope (40) is installed so as to form a predetermined angle with respect to the one master rope (30) in plan view, one master rope is installed in a straight line in plan view. The master rope (30, 40) can be installed with less deviation than in the usual case where it is installed. Moreover, since a part of the parent rope complex (X) with the joint (J) formed thereon, including the joint (J), is lifted onto the roof (85), the master ropes (30, 40) are connected to each other. There is no need to do work on the roof (85).

A third aspect of the invention is based on the first or second aspect of the invention, wherein the connecting portion lifting step (s3, s4) is performed by connecting the linear body to the movable body (10). is operated to move the linear body from one side of the building (80) over the roof (85) to the other side of the building (80). ), and in a state in which the connecting portion (J) is connected to the linear body, the linear body hung on the roof (85) is pulled up to obtain the and a linear body drawing step (s4) for pulling up the connecting portion (J) onto the roof. The movable body (10) may be, for example, a flying device such as a drone or a radio-controlled helicopter, or may be an operation rod or the like having a length that allows the linear body to be hung on the roof (85). In addition, the linear body may be, for example, a pilot line (20) connected to the parent class complex (X), or the parent class complex (X) itself, that is, the one It may be the parent rope (30) or said other parent rope (40).

According to the third invention, the linear body is installed by operating the movable body (10), and the connecting part (J) of the master rope complex (X) is placed on the roof (85) using the linear body. By pulling up, the installation work of the master rope complex (X) can be completed without the worker (H) climbing onto the roof. Therefore, the worker (H) can connect the safety belt to the main rope complex (X), which has been installed from the beginning of climbing on the roof (85). Therefore, the safety is high.

A fourth invention is the third invention, further comprising an anchor installation step (s2) of installing anchors (50a to 50d) around the building (80), wherein the linear The body and the parent rope complex (X) are accommodated so as to be able to extend, and in the linear body installation step (s3), the linear body is pulled by operating the movable body (10), and the linear body is pulled. A filamentous body is drawn out from within the anchor (50b), and in the filamentous body retrieving step (s4), the parent rope complex (X) is pulled into the anchor (50b) as the filamentous body is hauled in (s4). In the rope installation step (s5, s6), or the one parent rope installation step (s5) and the other parent rope installation step (s6), the end of the parent rope complex (X) is It connects with said anchor (50a, 50c, 50d).

According to the fourth invention, since the filamentous body and the parental rope complex (X) are housed in the anchor (50b), there is no need to separately prepare a container for housing them. In addition, since the linear body is pulled out as the linear body is pulled by the movable body (10), and the parental rope complex (X) is pulled out as the linear body is drawn in, the third invention can be efficiently performed. can be implemented.

A fifth invention is based on the first to fourth inventions, wherein the connection part (J) is formed by tying the master ropes (30, 40) so that the master ropes (30, 40) are engaged with each other. It is something to do.

According to the fifth invention, the connection portion (J) is less likely to get caught on roof tiles or the like, compared to, for example, the case where the master ropes (30, 40) are connected to each other with metal connectors or the like. Therefore, the joint (J) can be smoothly lifted onto the roof (85). In addition, since the connection portion (J) is less likely to get caught on roof tiles or the like, the roof tiles or the like are less likely to be damaged. Also, the work of tying the master ropes (30, 40) would be a lot of work if it were done on the roof, but here, the master rope complex (X) in which the connection part (J) is formed is , the part including the joint (J) is lifted above the roof (85), so that the tying operation can be done other than above the roof (85), for example on the ground. In addition, since the master ropes (30, 40) are tied so that the master ropes (30, 40) are engaged with each other, for example, compared to the case of tying a plurality of master ropes with different ropes or the like, The parent ropes (30, 40) can be firmly connected to each other.

A sixth invention is based on the first to fifth inventions, wherein in the connecting portion lifting step (s3, s4), either end (32) of at least one of the master ropes (30, 40) is connected to the building The connection part (J) is lifted to a predetermined position (P) within the movable range in a state where the movable range of the connection part (J) is limited by being fixed around the .

According to the sixth invention, after limiting the movable range of the connecting part (J), by lifting the connecting part (J) to a predetermined position (P) within the movable range, the movable range The joint (J) can be placed at the predetermined position (P) more easily than if the joint (J) were not restricted at all.

The figure which shows the master rope installation kit of 1st Embodiment. Diagram showing the master rope connection process Diagram showing the anchor installation process Diagram showing linear body installation process (pilot line installation process) Diagram showing a linear body hauling process (pilot line hauling process) Diagram showing rope installation process (one master rope installation process and other master rope installation process) Diagram showing the second embodiment

Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the embodiments, and can be modified as appropriate without departing from the gist of the invention.

[First embodiment]
The present embodiment embodies the first to sixth inventions described above. FIG. 1 shows a master rope installation kit K used in the master rope installation method of this embodiment. The master rope installation kit K includes a flight device 10, a pilot line 20, a master rope complex X, and four anchors 50a-50d.

The flight device 10 is a drone, a radio-controlled helicopter, or the like, and includes a hook for hooking a ring portion 21 of the pilot line 20, which will be described later.

The pilot line 20 is a linear body such as a wire made of a synthetic resin material or a metal material, and has flexibility and elasticity. A ring portion 21 for attachment to the hook of the flight device 10 is formed at the tip of the pilot line 20 . A proximal end of the pilot line 20 is detachably connected to a distal end of one main rope 30 by a connecting material 23 such as an adhesive tape.

The parent class complex X consists of two parent classes 30,40. Each of the master ropes 30 and 40 is a rope-shaped linear body made of a synthetic resin material, a metal material, or the like, and has flexibility. In the master rope complex X, the intermediate portions of the two master ropes 30 and 40 are connected to each other to form a connecting portion J, and four rope portions 31 each having the connecting portion J as a base end. , 32, 43, 44 are formed.

Hereinafter, the portion from the connecting portion J to the tip of the one main rope 30 is referred to as the first rope portion 31, and the portion from the connecting portion J to the base end of the one main rope 30 is referred to as the second rope portion 32. A portion from the connecting portion J to one end of the other master rope 40 is called a third rope portion 43 , and a portion from the connecting portion J to the other end of the other master rope 40 is called a fourth rope portion 44 . The end of the second rope portion 32 (base end of one master rope 30) is connected to one anchor (second anchor 50b).

The ends of ropes 31, 32, 43, 44 are connected to each of the four anchors 50a-50d. Hereinafter, for the sake of clarity, one anchor to which the above-described second rope portion 32 is connected is referred to as a second anchor 50b. The anchor to which the first rope portion 31 is connected later is called the first anchor 50a, the anchor to which the third rope portion 43 is connected later is called the third anchor 50c, and the anchor to which the fourth rope portion 44 is connected later. is called a fourth anchor 50d.

Each of the four anchors 50a-50d consists of four bag-like containers 51-54 joined together to form a unit, each container 51-54 having a tank 57 mounted therein and the tank 57 By filling with water, the weight increases and it is fixed to the ground or the like. Belts 59 for connecting the ends of the ropes 31, 32, 43, 44 are attached to each of the containers 51-54. In this embodiment, when the end of the rope is connected to the anchor, it means that the belts 59 of the four containers 51 to 54 are put together and the end of the rope is connected to them. Inside the containers 51 to 54, instead of the tank 57, or with the tank 57 folded, the master rope complex X and the pilot line 20 can be stored.

In this embodiment, before the master rope installation kit K is used, the master rope complex X and the pilot line 20 are housed in the second anchor 50b with the tank 57 folded. . More specifically, inside one container 51 of the second anchor 50b, the pilot line 20 and one master rope 30 are housed in a coiled state so that they can be drawn out. Further, inside another container 53 of the second anchor 50b, a third rope portion 43 (one end side of the other main rope 40) is stored in a state of being wound toguro so that it can be pulled out. Further, inside another container 54 in the second anchor 50b, a fourth rope portion 44 (the other end side of the other main rope 40) is stored in a state of being wound toguro so that it can be pulled out.

Next, the method of installing the main rope according to this embodiment will be described. FIG. 2 shows the master rope connection step performed first in the master rope installation method. In the master rope connecting step, the master ropes 30 and 40 are connected so that the middle portions of the two master ropes 30 and 40 are engaged with each other, thereby forming the connecting portion J and forming the master rope complex X. . However, in this embodiment, the parental class complex X is already formed as described above. That is, the master rope connection step s1 has already been performed before the master rope installation kit K is brought into the site.

FIG. 2(a) is a plan view showing an example of the master rope connecting step s1. In this example, first, a loop 48 is formed in the middle of one of the parent ropes (the other parent rope 40 in the figure) by a "double figure-of-eight knot". The "double figure eight knot" is also called "double figure eight knot" or "Flemish loop". Next, the other main rope (one main rope 30 in the figure) is connected to the loop 48 by a "main knot" at the middle part in the longitudinal direction. Thereby, the connection part J is formed. Thereby, the intermediate portions of the two master ropes 30 and 40 are connected.

For the sake of clarity, FIG. 2(a) shows a loosened state before the "final knot" is tightened strongly. The "final knot" is strongly tightened by pulling strongly in the direction of the arrow.

FIG. 2(b) is a plan view showing another example of the master rope connection step s1. Also in this example, first, a loop 48 is formed in the intermediate portion of one of the master ropes (for example, the other master rope 40) by a "double figure-of-eight knot". Next, another loop 38 passing through the inside of the loop 48 is formed in the middle part of the other master rope (for example, one master rope 30) by a "double figure-of-eight knot". As a result, the two loops 38 and 48 are connected together in a chain to form a connecting portion J made up of the two loops 38 and 48 . As a result, the middle portions of the two master ropes 30 and 40 are bound together.

FIG. 2(c) is a plan view showing another example of the master rope connecting step s1. In this another example, both the main ropes 30 and 40 are folded back at their longitudinal intermediate portions, and the folded portions and their periphery are overlapped substantially parallel to each other, and then they are tied together in a "figure 8 knot". As a result, the intermediate portions of the two master ropes 30 and 40 are bound together to form a connecting portion J.

FIG. 3 shows the anchor installation step s2 that is performed first at the site where the parental complex X is installed. Fig.3 (a) is a top view which shows the first half of the anchor installation process s2. In the anchor installation step s2, first, the worker H places four anchors 50a to 50d on the ground around the building 80. As shown in FIG. Specifically, the anchors 50a to 50d are arranged on four sides of the predetermined position P where the joint J is to be finally arranged. More specifically, the first anchors 50a and the second anchors 50b are arranged on both sides of the roof 85 of the building 80 in the transverse direction, and the third anchors 50c and the fourth anchors 50d are arranged on both sides of the roof 85 in the longitudinal direction. . In addition, the roof 85 of this embodiment is a square roof.

FIG.3(b) is a perspective view which shows the latter stage of the anchor installation process s2. Here, the operator H fills the tanks 57 of the containers 51 to 54 of the anchors 50a to 50d with water W to increase the weight of the anchors 50a to 50d and fix them at their respective positions. However, the three containers 51, 53, 54 of the second anchor 50b are not filled with the water W because the pilot line 20 and the master rope complex X are accommodated as described above. Further, in the first anchor 50a, only the tanks 57 of the three containers 51, 53, and 54 are filled with the water W, and the tank 57 of the remaining one container 52 is left empty.

FIG. 4 shows a pilot line installation step s3 performed after the anchor installation step s2. FIG. 4(a) is a perspective view showing the first half of the pilot line installation step s3. In the pilot line installation step s3, first, the worker H connects the ring portion 21 at the tip of the pilot line 20 to the hook of the flight device 10 . Next, the worker H operates the controller 15 of the flying device 10 to fly the flying device 10 from one side to the other side of the building 80 . Thereby, the pilot line 20 is hung on the roof 85 without the worker H climbing on the roof 85.例文帳に追加At this time, as the flight device 10 is pulled by the flight, the pilot line 20 extends from the coiled state, and is successively drawn out from the container 51 of the second anchor 50b.

FIG. 4(b) is a plan view showing the latter stage of the pilot line installation step s3. The pilot line 20 is installed so as to pass over the roof 85 from the second anchor 50b side of the building 80 and reach the first anchor 50a side of the building 80 .

FIG. 5 shows the pilot line pulling step s4 performed after the pilot line installation step s3. FIG. 5(a) is a plan view showing the first half of the pilot line hauling step s4. In the pilot line hauling step s4, the master rope complex X is hauled by hauling the pilot line 20 hanging over the roof 85 from the distal end side (first anchor 50a side) to the base end side (second anchor 50b side). Pull in from the first rope portion 31 side. As a result, one master rope 30 is hung on the roof 85 so as to pass over the roof 85 from the second anchor 50b side of the building 80 and reach the first anchor 50a side of the building 80. The connecting portion J of the composite X is pulled up onto the roof 85 from within the second anchor 50b.

At this time, the parental rope complex X is successively drawn out from the respective containers 51, 53, 54 of the second anchor 50b in accordance with the hauling. Specifically, first, the first rope portion 31 is extended from the state in which the toggle is wound, so that the first rope portion 31 is let out from the container 51 . After that, the second rope portion 32, the third rope portion 43, and the fourth rope portion 44 extend in parallel from the state in which the toggle is wound, so that they are unwound from the containers 51, 53, and 54, respectively.

FIG. 5(b) is a perspective view showing the latter stage of the pilot line hauling step s4. When the second rope portion 32 is completely unrolled from the container 51, it becomes impossible to draw the pilot line 20 any further. This is because, as described above, the end of the second rope portion 32 is connected to the second anchor 50b. Therefore, the connecting portion J does not move further toward the first anchor 50a. In this way, the movable range of the connecting portion J is limited within the length range of the second rope portion 32 starting from the second anchor 50b. In this embodiment, the position of the second anchor 50b and the length of the second rope portion 32 are adjusted so that the connection portion J is at or near the predetermined position P when the second rope portion 32 is fully extended. is pre-adjusted. Therefore, the connecting portion J can be arranged at the predetermined position P easily.

The hauled-in pilot line 20 is removed from one main rope 30, rolled up in a coiled manner, and collected in one empty container 52 of the first anchor 50a. In addition, the three containers 51, 53, 54 of the second anchor 50b are empty by the pilot line 20 and the master rope complex X being drawn out. For the three empty containers 51, 53 and 54, the tanks 57 containing them are widened and filled with water. Accordingly, the weight of the second anchor 50b is increased to reinforce the fixing force of the second anchor 50b.

FIG. 6(a) is a plan view showing the first master rope installation step s5 performed after the pilot line hauling step s4 and the other master rope installation step s6 performed thereafter. In one master rope installation step s5, the following work is performed while the joint J of the master rope complex X is arranged on the roof 85. As shown in FIG. That is, the tip of one master rope 30 (the end of the first rope portion 31) that is pulled toward the first anchor 50a is connected to the first anchor 50a. As a result, both ends of one master rope 30 are connected to the first anchor 50a and the second anchor 50b, respectively. At this time, an appropriate tension is applied to the one master rope 30 from both ends. In addition, one main rope 30 is stretched on the roof 85 so as to form a straight line in a plan view.

In the other master rope installation step s6, the following work is performed while both ends of the one master rope 30 are fixed. That is, assuming that the flow direction of the portion of the roof 85 on which the joint J is placed is the flow direction Z, first, the anchor (third anchor 50c) on the opposite side of the flow direction Z (upstream side in the flow direction) is attached to another parent anchor. One end of the rope 40 (the end of the third rope 43) is connected. Next, the other end of the other master rope 40 (the end of the fourth rope portion 44) is connected to the anchor (fourth anchor 50d) on the flow direction Z side (flow direction downstream side). As a result, both ends of the other master rope 40 are connected to the third anchor 50c and the fourth anchor 50d, respectively, that is, both ends are fixed on opposite sides of the building 80, respectively. At this time, an appropriate tension is applied to the other master rope 30 from both ends. The other master rope 40 is stretched so as to form a right angle (90°) with respect to the one master rope 30 in plan view.

The one master rope installation process s5 and the other master rope installation process s6 constitute the rope installation processes s5 and s6. In the rope installation steps s5 and s6, the four ropes 31, 32, 43, and 44 of the parent rope complex X are installed so as to extend crosswise (radially) from the joint J. With the above, the method of installing the main rope according to the present embodiment is completed.

FIG.6(b) is a perspective view which shows the state at the time of completion of the master rope installation method. According to this embodiment, the effects of the first to sixth inventions can be obtained. In addition, by pulling up part of the parent rope complex X using the pilot line 20, compared to the case where part of the parent rope complex X is pulled up directly, the part of the parent rope complex X can be easily lifted from the roof. It can be lifted onto 85.

[Second embodiment]
Next, a second embodiment will be described with reference to FIG. In this embodiment, the same reference numerals are given to the same or corresponding members as those of the first embodiment, and only the points different from the first embodiment will be described.

The master rope complex X and the pilot line 20 are placed outside the containers 51 to 54 of the second anchor 50b, and a tank 57 is mounted inside each container 51 to 54 and filled with water w. be. The roof 85 is a hipped roof. A distal end portion of the first rope portion 31 and a distal end portion of the third rope portion 43 are connected to the proximal end portion of the pilot line 20 .

FIG. 7(a) is a plan view showing the pilot line hauling step s4. In this embodiment, the first anchor 50a and the third anchor 50c are installed on one side of the roof 85 in the short direction of the building 80 with an interval in the longitudinal direction. In addition, the second anchor 50b and the fourth anchor 50d are installed on the other side of the roof 85 in the short direction of the building 80 with an interval in the longitudinal direction. Then, the pilot line 20 is hung on the short side of the roof 85 .

In the pilot line hauling step s4, the master rope complex X is hauled by hauling the pilot line 20 hanging over the roof 85 from the distal end side (first anchor 50a side) to the base end side (second anchor 50b side). The first rope part 31 and the third rope part 43 side are pulled together. As a result, the one main rope 30 and the other main rope 40 are hung on the roof 85 so as to pass over the roof 85 from one side of the building 80 and reach the other side of the building 80. The connecting portion J of the composite X is pulled up onto the roof 85 .

Then, when the connection part J reaches the top of the roof 85, as shown in FIG. 32 is connected to the second anchor 50b, the third tether 43 is connected to the third anchor 50c, and the fourth tether 44 is connected to the fourth anchor 50d. As a result, the master rope complex X is installed in an X shape with respect to the roof 85 .

According to this embodiment as well, the effects of the first to third inventions and the fifth invention can be obtained.

[Other embodiments]
For example, the present invention can be implemented by changing the first embodiment as follows.

First, modifications within the scope of implementing the first to sixth inventions will be described. For example, instead of performing the main rope connection step s1 before bringing the main rope installation kit K to the site, it may be performed after the main rope installation kit K is brought to the site. Also, instead of performing the work of connecting the pilot line 20 to the one master rope 30 before bringing the master rope installation kit K to the site, it may be performed after the installation kit is brought to the site.

Also, the other master rope 40 may be stretched so as to form a different angle with respect to the one master rope 30 instead of being stretched so as to form a right angle with respect to the one master rope 30 in plan view. Further, instead of setting the angles between each two adjacent ropes to 90°, they may be set to different angles such as 70°, 100°, 80°, 110°.

Also, instead of connecting the two master ropes 30 and 40 by the above knotting method, other knotting methods may be used. Also, the method of installing the main rope according to the present embodiment may be applied to a hipped roof, a Tsumagiri roof, a shed roof, etc., instead of being applied to the square roof (roof 85).

Next, a description will be given of a modification that implements a mode different from the sixth invention. For example, instead of performing the work of connecting one main rope 30 to the second anchor 50b before bringing the main rope installation kit K to the site, the work can be performed after the joint J is lifted onto the roof 85. good too. In this case, when none of the ropes 31, 32, 43, 44 are fixed to the ground, that is, when the movable range of the joint J is not restricted, the joint J can be lifted to the predetermined position P. become.

In addition, instead of using the pilot line 20 to lift a part of the master rope complex X onto the roof 85, the pilot line 20 is not used, and the master rope complex X is directly pulled up by the flight device 10, the operation rod, or the like. may be pulled up onto the roof 85.

Next, a description will be given of a modification that implements a mode different from the fifth invention. For example, instead of tying the master ropes 30 and 40 together, the two master ropes 30 and 40 may be connected with a connector made of metal or the like. Also, the two master ropes 30 and 40 may be tied with a different rope or the like.

Next, a description will be given of a modification that implements a mode different from the fourth invention. For example, in the master rope installation kit K, the pilot line 20 and the master rope complex X may be placed outside the second anchor 50b, and the tank 57 may be installed in each of the containers 51 to 54 of the second anchor 50b. good. Also, instead of the anchors 50a-50d comprising the four containers 51-54, sandbag-type anchors or metal fitting-type anchors that are attached to the ground may be used. Further, instead of storing the pilot line 20 and the master rope complex X in the second anchor 50b, they may be stored in containers separate from the anchors 50a to 50d.

Next, a description will be given of a modification that implements a mode different from the third invention. For example, instead of hanging the pilot line 20 on the roof 85 by the flight device 10, the pilot line 20 may be hung on the roof 85 by an operating rod or the like.

Further, instead of using the flight device 10 and the pilot line 20 to hoist a part of the master rope complex X on the roof, the operator H climbs onto the roof 85 and lifts the master rope complex from the roof 85 . Part of parental complex X may be lifted onto roof 85 by pulling body X.

Next, a description will be given of a modification that implements a mode different from the second invention. For example, instead of installing the main rope 30 so that it extends linearly and the other main rope 40 extends linearly perpendicular thereto in plan view, one main rope is L-shaped in plan view. and the other master rope may be installed so as to extend in an inverted L shape (a shape obtained by rotating the L shape by 180°). That is, for example, in FIG. 6( a ), one master rope 30 forms an L shape forming a first rope portion 31 and a third rope portion 43 , and the other master rope 40 forms a second rope portion 32 and a third rope portion 43 . An inverted L-shape forming the four ropes 44 may be formed.

In addition, instead of connecting the intermediate portions of the two master ropes 30 and 40, one end of each of the four master ropes is connected at one point, so that the one point (connecting portion) is the base end. It is also possible to form four ropes as a part.

Alternatively, instead of connecting the four ropes 31, 32, 43, 44 to the anchors 50a to 50d, one rope may be left idle and only the remaining three ropes may be connected to the anchors. good. That is, one rope may be left idle and only the remaining three ropes may be installed so as to form a Y shape (radial shape) in a plan view.

Also, instead of connecting the middle portions of the two master ropes 30 and 40, the middle portion of one master rope may be connected to the end of another master rope. Then, only three rope portions having the connection portion as a base end portion may be formed, and the three rope portions may be arranged so as to form a Y shape (radial shape) in a plan view.

10... flight device 20... pilot line 30... first master line 40... other master line 50a... first anchor 50b... second anchor 50c... third anchor 50d... fourth anchor 80... Building, 85... Roof, J... Connecting part, P... Predetermined position, X... Parent rope complex, s2... Anchor installation process, s3... Pilot line installation process, s4... Pilot line hauling process, s5... First main rope installation Steps, s6 . . .

Claims (6)

A parent rope complex comprising a plurality of parent ropes, wherein the parent ropes are connected to each other to form a connection portion, thereby forming at least three rope portions having the connection portion as a base end. , a connecting part lifting step of lifting a part including the connecting part from a position lower than the roof of the building onto the roof;
a rope installation step of installing at least three of the ropes so as to extend radially from the connecting portion raised above the roof in a plan view;
A parent rope installation method. Concerning a parent rope complex comprising one parent rope and another parent rope, wherein a connecting portion is formed by connecting an intermediate portion of the one parent rope and an intermediate portion of the other parent rope , a connecting part lifting step of lifting a part including the connecting part from a position lower than the roof of the building onto the roof;
A step of installing the main rope so that both ends of the main rope are fixed around the building while the connecting portion is arranged on the roof;
an other master rope installation step of installing the other master rope so as to form a predetermined angle with respect to the one master rope after the one master rope installation step;
A parent rope installation method. The connecting portion frying step includes:
In a state in which a linear body provided separately from the main rope complex is connected to the movable body, the linear body can be moved from one side of the building to the roof by operating the movable body. a step of installing a linear body to be hung on the roof so as to pass over the building and reach the other side of the building;
In a state in which the rope part or the one main rope is connected to the linear body, the linear body is pulled up on the roof, thereby pulling up the connecting part onto the roof. a sending process;
The parent rope installation method according to claim 1 or 2. Furthermore, it has an anchor installation process for installing anchors around the building,
The filamentous body and the parental rope complex are housed in the anchor so as to be able to be drawn out,
In the step of installing the linear body, the linear body is drawn out from the anchor as the linear body is pulled by the operation of the movable body,
In the step of retrieving the filamentous body, the parent rope complex is drawn out from within the anchor as the filamentous body is hauled in,
In the rope installation step, or the one parent rope installation step and the other parent rope installation step, an end of the parent rope complex is connected to the anchor.
4. The method of installing the master rope according to claim 3. The method of installing a master rope according to any one of claims 1 to 4, wherein the connecting portion is formed by tying the master ropes so that the master ropes are engaged with each other. In the connecting portion lifting step, the movable range of the connecting portion is restricted by fixing either end of at least one of the master ropes around the building, and the connecting portion 6. The method of installing the master rope according to any one of claims 1 to 5, wherein the is lifted to a predetermined position within the movable range.

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