JP2021173033A - Main rope installation method - Google Patents

Abstract

To provide a main rope installation method capable of enhancing safety in work on a roof using the main rope.SOLUTION: When installing main ropes 21, 22 on a roof 11 of a building 10, following steps are performed: a rope stretching step for stretching the two main ropes 21, 22 so as to form an X shape in a plan view in a state of being connected at an intermediate part of each other, and a safety belt connecting step for connecting a safety belt 24 to a connecting part 23 to which the respective main ropes 21, 22 are connected after the rope stretching step.SELECTED DRAWING: Figure 1

Description

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

Workers may climb on the roof when constructing a new building such as a house or when performing maintenance work on an existing building. In this case, the main rope is stretched on the roof in advance, and the worker can secure the safety of the work on the roof by connecting the safety belt attached to the main rope to the main rope.

As a method of installing the main rope on the roof, Patent Document 1 discloses a method of installing two main ropes on the roof so as to form a cross in a plan view. In this installation method, the main ropes are connected by being tied at an intersection where they intersect each other.

Japanese Unexamined Patent Publication No. 2012-122328

When a worker working on the roof falls from the roof, it is conceivable that the worker falls from the eaves of the roof, for example. In this case, in the installation method of Patent Document 1, it is assumed that the drop load of the worker is concentrated on the main rope extending in the direction orthogonal to the eaves in the plan view among the main ropes forming a cross. Will be done. Therefore, it can be said that the installation method of Patent Document 1 still has room for improvement in preventing damage to the main rope due to a drop load, and in turn, in improving the safety of work on the roof using the main rope. It can be said that there is still room for improvement.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a main rope installation method capable of enhancing safety for work on a roof using a main rope.

In order to solve the above problem, the method of installing the main rope of the first invention is to form an X-shape in a plan view with two main ropes connected to each other in the middle of each other on the roof of the building. It is characterized by including a rope tensioning step for stretching the rope, and a safety belt connecting step for connecting the safety belt to the connecting portion to which the main ropes are connected after the rope tensioning step.

According to the present invention, two main ropes are stretched on the roof of a building so as to form an X shape in a plan view while being connected at an intermediate portion between the two main ropes. Then, a worker's safety belt is connected to the connection portion of each of the main ropes stretched on the roof. In this case, when the worker falls from any of the four sides of the roof, the falling load (falling load) is distributed and applied to the two main ropes. Therefore, damage to the main rope due to the drop load can be reliably prevented, and as a result, safety can be enhanced when working on the roof using the main rope.

In the first invention, the master rope installation method of the second invention comprises a lifting rope connecting step of connecting a lifting rope used by an operator when climbing on the roof using a ladder to the connecting portion. It is characterized by being prepared.

According to the present invention, a lifting rope used by an operator when climbing on the roof using a ladder is connected to the connecting portion of each main rope. In this case, the elevating rope can be used until the worker climbs the roof using the ladder and then moves on the roof to the connecting portion. As a result, it is possible to safely perform a series of movements until the worker connects the safety belt worn on himself / herself to the connection portion.

In the method of installing the main rope of the third invention, in the first or second invention, the roof is formed with a pair of roof edge portions extending in parallel and facing each other in a plan view. As a step to be performed before the tensioning step, a pilot line installation step of hanging the pilot line on the roof so as to straddle both sides of the roof edge portion and the master ropes connected at the connecting portion. By pulling the pilot line hung on the roof with one end side of the roof connected to the pilot line, the main ropes can be straddled on both sides of the roof edge portion. The roof is provided with a rope pulling step of pulling the connecting portion onto the roof so that the connecting portion is placed on the roof. By moving along the edge portion, each of the master ropes is arranged in the X shape in a plan view.

According to the present invention, a pilot line is first hung on the roof, and then each master rope is pulled up on the roof by pulling the pilot line in a state where one end side of each master rope is connected to the pilot line. At this time, each master rope is pulled up on the roof so as to straddle both sides of the pair of opposite roof edge portions. After that, by moving a pair of rope portions extending from the connecting portion in each master rope along the roof edge portion, each master rope is stretched in an X shape in a plan view. In this case, when moving the rope portion, it is not necessary to move the rope portion from the roof peripheral edge portion to the adjacent roof peripheral edge portion across the roof peripheral edge portion and the roof corner portion. Therefore, when moving the rope portion, it is possible to prevent the rope portion from being caught in the roof corner portion and becoming difficult to move. As a result, the work can be easily performed when each main rope is stretched in an X shape.

In the third invention, the master rope installation method of the fourth invention includes a temporary fixing step of temporarily fixing one end side of each master rope, and in the temporary fixing step, the master ropes are aligned on the one end side. A loop is formed by folding back in the state of being held, and the temporary fixing is performed so that the loop is held. It is characterized in that each of the main ropes is pulled up onto the roof in a connected state.

When each main rope is pulled up on the roof by pulling the pilot line, one end side of each main rope connected to the pilot line becomes the tip and is pulled up. In this case, when pulling up each main rope, it is assumed that one end side of each main rope is caught at the edge of the roof, and it is considered that such catching is likely to occur especially when two main ropes are pulled up at the same time.

Therefore, in view of these points, in the present invention, an odor loop is formed on one end side of each master rope, and one end side of each master rope is temporarily fixed in the formed state of the loop. Then, with the pilot line connected to one end of the temporarily fixed rope, each main rope is pulled up onto the roof. In this case, when pulling up each master rope, the loop formed on one end side of each master rope can be pulled up as a tip, so that it is possible to prevent the one end side from being caught at the roof edge portion.

In the method of installing the main rope of the fifth invention, in any of the fourth inventions, in the pilot line installation step, two of the pilot lines are hung on the roof, and in the rope pulling step, of each of the pilot lines. With one of them connected to the loop on the one end side of each of the main ropes and the other connected to the connection portion side of the loop, the pilot lines are pulled by hand to connect the main ropes to the roof. It is characterized by pulling it up.

By the way, depending on the shape of the roof edge (and by extension, the roof), even in the fifth invention in which a loop is formed on one end side of each main rope, it is assumed that the roof edge may be caught. NS. Therefore, in the present invention, the following method is adopted so that even if the roof edge portion is caught, the catch can be eliminated.

That is, in the present invention, two pilot lines are used to pull up each master rope onto the roof. In this case, one of the pilot lines is connected to the loop on one end side of each main rope, and the other is connected to the connection part side of the loop, and each pilot line is pulled up to connect each main rope on the roof. Pull up to. Here, when pulling up each main rope, if the loop that is the tip in the pulling direction is caught at the edge of the roof, stop pulling the pilot line connected to the loop and connect it rather than the loop in that state. Try to pull the pilot line connected to the part side. As a result, the loop is lifted from the connection portion side of the loop, and the loop is eliminated from being caught by the lifting.

As described above, in the present invention, when each main rope is pulled up, even if it is caught at the edge of the roof, the catch can be quickly eliminated. Therefore, the work of pulling up the main rope can be performed quickly.

In the method of installing the main rope of the sixth invention, in any of the third to fifth inventions, in the pilot line installation step, the pilot line is hung on two operating rods and placed at a position higher than the roof. In the held state, the pilot line is positioned above the roof by moving each of the operating rods to both sides of the roof edge portion, and then the operating rods are operated to operate the pilot. It is characterized in that the pilot line is hung on the roof by lowering the line.

According to the present invention, when the work of hanging the pilot line on the roof is performed, the pilot line is hung on the two operation rods at a position higher than the roof, and two workers holding each of the operation rods. The pilot line can be hung on the roof by moving along each roof edge. In this case, the work of hanging the pilot line on the roof can be performed near the building, so even if the site of the building is small and there is not much work space around the building, it is relatively easy to hang the pilot line on the roof. be able to.

(A) is a perspective view showing a building in which a main rope is installed, and (b) is a plan view. (A) is a perspective view showing a master rope connecting process, and (b) is an enlarged view showing the connecting portion of each master rope. The figure which shows each parent rope. The perspective view which shows the elevating rope connecting process. The perspective view which shows the pilot line connection process. (A) is a diagram showing a temporary fixing process, and (b) is a diagram showing a pilot line connecting process. The perspective view which shows the temporary placement process. The perspective view which shows the pilot line installation process. The perspective view which shows the pilot line installation process. The perspective view which shows the pilot line installation process. The perspective view which shows the anchor installation process. (A) is a perspective view which shows the rope pulling process, and (b) is a side view which shows the same process. The figure explaining the solution method when one end side of the main rope is caught in the eaves. The perspective view which shows the rope tensioning process. The perspective view which shows the roof moving process. The perspective view which shows the safety belt connection process.

Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. 1A and 1B are perspective views showing a building in which a main rope is installed, and FIG. 1B is a plan view.

As shown in FIGS. 1A and 1B, a building 10 such as a house is provided with a gabled roof 11. The roof 11 has a rectangular shape (rectangular shape) in a plan view. A ridge 12 is formed on the top of the roof 11, and an eaves 13 and a fluffy 14 are formed on the edge of the roof 11. The ridge 12 and the eaves 13 extend in the longitudinal direction of the roof 11 in a plan view, and the cliff 14 extends in the lateral direction of the roof 11 in a plan view. The eaves 13 and the fluffy 14 correspond to the roof edge, respectively.

Two main ropes 21 and 22 are installed on the roof 11 in a stretched state. The main ropes 21 and 22 are linear members such as ropes formed of a synthetic resin material, a metal material, or the like, and have flexibility. The main ropes 21 and 22 are used when the worker works on the roof 11. When the worker works on the roof 11, the safety belt 24 attached to the worker is connected to the main ropes 21 and 22.

The main ropes 21 and 22 are stretched on the roof 11 in a state where they intersect in an X shape in a plan view. In this case, the main ropes 21 and 22 extend in a direction in which they are inclined with respect to both the eaves 13 and the fluff 14 extending in the directions orthogonal to each other in the plan view on the roof 11. The master ropes 21 and 22 are connected at intersections that intersect each other. In this case, a connecting portion 23 is formed by connecting the master ropes 21 and 22 to the intersections of the master ropes 21 and 22. The connecting portion 23 is arranged in the ridge 12 of the roof 11, and is located substantially in the center of the roof 11 in a plan view.

The main ropes 21 and 22 extend on the roof 11 via the ridge 12 across the eaves 13, and both ends extend downward from the eaves 13. Both ends of each of the main ropes 21 and 22 are fixed to anchors 25 provided around the building 10. The anchors 25 are arranged near the four corners of the building 10 and are fixed to the ground. By fixing both ends of the main ropes 21 and 22 to these anchors 25, the main ropes 21 and 22 are installed in a state of being stretched on the roof 11. Further, the anchor 25 has a plurality of tanks 25a, and each of the tanks 25a is filled with water to increase the weight so that the anchor 25 is fixed to the ground.

An elevating rope 26 is connected to the connecting portion 23 of each of the main ropes 21 and 22. The elevating rope 26 is used when an operator ascends and descends on the roof 11 using the ladder 27. One end of the lifting rope 26 is connected to the connecting portion 23, and the other end side hangs downward from the eaves 13.

Next, the work flow when installing the main ropes 21 and 22 on the roof 11 will be described. When installing the main ropes 21 and 22 on the roof 11, the main rope connecting step is first performed. 2A is a perspective view showing a master rope connecting process, and FIG. 2B is an enlarged view showing a connecting portion 23 of each master rope 21 and 22. Further, FIG. 3 is a diagram showing the main ropes 21 and 22.

As shown in FIG. 3, each of the main ropes 21 and 22 has the same length. Further, the main ropes 21 and 22 are formed in different colors so that they can be easily distinguished from each other. Each of the main ropes 21 and 22 is provided with a plurality of markers 28 (markers) in the length direction thereof. A plurality of markers 28 have the same configuration in each of the main ropes 21 and 22, and therefore, the markers 28 of the respective main ropes 21 and 22 are designated by a common reference numeral 28.

The marker 28 is formed by coloring the main ropes 21 and 22. Each marker 28 includes a first marker 28a arranged at the center of the main ropes 21 and 22 in the length direction, and a pair of second markers 28b arranged on both sides of the first marker 28a. There is. Each of the second markers 28b has the same distance from the first marker 28a. The distance between the first marker 28a and the second marker 28b is larger than the distance from the ridge 12 of the roof 11 to the eaves 13, for example, about 6 m.

In the master rope connecting step, as shown in FIG. 2A, the work of connecting the master ropes 21 and 22 at the intermediate portion between them is performed. In this work, the intermediate portions of the main ropes 21 and 22 are connected by connecting them to each other. Specifically, in this work, as shown in FIG. 2 (b), the intermediate portions of the main ropes 21 and 22 are connected by a double figure-eight knot. As a result, the connecting portion 23 is formed in the intermediate portion of each of the main ropes 21 and 22, and the loop 29 is formed in the connecting portion 23. More specifically, when connecting the main ropes 21 and 22, the first marker 28a is connected so as to be located in the loop 29.

Further, by connecting the main ropes 21 and 22, a pair of rope portions 21a and 21b extending from the connecting portion 23 to the opposite sides are formed on the main rope 21. Further, the main rope 22 is formed with a pair of rope portions 22a and 22b extending from the connecting portion 23 on opposite sides to each other.

Next, the lifting rope connecting step is performed. FIG. 4 is a perspective view showing a lifting rope connecting process. As shown in FIG. 4, in the elevating rope connecting step, one end of the elevating rope 26 is connected to the connecting portion 23 of each of the main ropes 21 and 22. In this work, one end of the elevating rope 26 is passed through the inside of the loop 29 of the connecting portion 23, and in that state, the one end is connected to the loop 29 for connection.

Next, the pilot line connection step is performed. FIG. 5 is a perspective view showing a pilot line connecting process. 6A and 6B are diagrams showing a temporary fixing step performed before the pilot line connecting step, and FIG. 6B is a diagram showing the pilot line connecting step.

As shown in FIG. 5, in the pilot line connecting step, the pilot lines 31 and 32 are connected to one end side of each of the main ropes 21 and 22 (specifically, the rope portions 21b and 22b). The pilot lines 31 and 32 are linear members such as wires formed of a synthetic resin material or a metal material, and have flexibility and elasticity. The pilot lines 31 and 32 are lighter than the main ropes 21 and 22, and the weight per unit length is smaller than that of the main ropes 21 and 22. Further, the pilot lines 31 and 32 are formed in different colors so that they can be easily distinguished.

More specifically, the pilot line connecting step will be described more specifically. In the present embodiment, first, a temporary fixing step of temporarily fixing one end side (each other) of each of the main ropes 21 and 22 is performed prior to the pilot line connecting step. In the temporary fixing step, as shown in FIG. 6A, a loop 35 is formed by folding back the main ropes 21 and 22 on one end side of the main ropes 21 and 22 in a aligned state, and the loop 35 is formed. The work of temporarily fixing each of the main ropes 21 and 22 is performed so that In this work, the main ropes 21 and 22 are folded back in a state where each one end is aligned at the same position, and the one end portion that is the tip end portion of the folded side is on the other end side. Temporarily fix it to the portion (on the connecting portion 23 side) with the adhesive tape 34. The temporary fixing may be performed by using a temporary fixing member other than the adhesive tape 34. Further, it is desirable that the size of the loop 35 formed by the temporary fixing step is about 20 to 30 cm. Further, in the loop 35, the end portion on the side opposite to the connecting portion 23 side is the top portion 37 of the loop 35.

Subsequently, the pilot line connection step is performed. In the pilot line connecting step, as shown in FIG. 6B, one end of the pilot line 31 is connected to the top 37 of the loop 35 on one end side of each of the main ropes 21 and 22, and one end of the pilot line 32 is connected to each. It is connected to the connecting portion 23 side of the loop 35 at one end side of the main ropes 21 and 22. In this case, the pilot line 31 is connected by connecting to the loop 35, and the pilot line 32 is connected by using a connecting material such as an adhesive tape 39. However, the connection method of the pilot lines 31 and 32 is not limited to this, and other connection methods may be adopted. Further, regarding the pilot line 32, the main ropes 21 and 22 are connected to the temporarily fixed portion temporarily fixed by using the adhesive tape 34.

Next, a temporary placement step is performed. FIG. 7 is a perspective view showing a temporary placement process.

As shown in FIG. 7, in the temporary placement process, the main ropes 21 and 22, the elevating ropes 26, and the pilot lines 31 and 32 connected by each of the above steps are temporarily placed on the ground on the side of the building 10. conduct. In the temporary placement process, first, the main ropes 21 and 22, the elevating rope 26, and the pilot lines 31 and 32 are put in the storage bag 41 and stored. In this case, the main ropes 21 and 22, the elevating rope 26, and the pilot lines 31 and 32 are stored in the storage bag 41 in a state in which the pilot lines 31 and 32 can be drawn out first.

Subsequently, the storage bag 41 containing each member 21, 22, 26, 31, 32 is temporarily placed on the ground on the side of the building 10. In this case, the storage bag 41 is temporarily placed on one side of both sides of the eaves 13 in a plan view. This temporary storage position is set to substantially the same position as the center position of the eaves 13 (roof 11) in the extending direction of the eaves 13.

Next, the pilot line installation process is performed. 8 to 10 are perspective views showing a pilot line installation process.

In the pilot line installation process, as shown in FIG. 8, two operators perform the work using the two operation rods 43. The operation rod 43 is formed so as to be expandable and contractible, and its length is, for example, about 7 to 15 m in the extended state. Therefore, when an operator on the ground holds the operating rod 43 in the extended state, the tip of the operating rod 43 reaches a position higher than the ridge 12 of the roof 11. A substantially U-shaped hook 44 is attached to the tip of the operating rod 43. Pilot lines 31 and 32 and main ropes 21 and 22 can be hooked on the hook 44.

In the pilot line installation step, first, as shown in FIG. 8, two pilot lines 31 and 32 are hung on the tip of each operation rod 43. This work is performed in a state where each operation rod 43 is contracted. In this work, the pilot lines 31 and 32 are pulled out from the storage bag 41, and the pulled out portions are hung on the hooks 44 of the operating rods 43. At this time, one end (pulled out tip) of each pilot line 31 and 32 is connected to the hook 44 of one of the operation rods 43, and the hook 44 of the other operation rod 43 is connected to the hook 44. Hook the middle part of each pilot line 31 and 32. After that, each operating rod 43 is extended, and the pilot lines 31 and 32 are raised to a position higher than the roof 11. As a result, the pilot lines 31 and 32 are hung and held by the operating rods 43 at a position higher than the roof 11.

Subsequently, as shown in FIG. 9, the operation rods 43 are moved to both sides of the eaves 13 so that the pilot lines 31 and 32 are positioned above the roof 11. This work is performed by each worker holding the operation rod 43 moving to both sides of each eaves 13 (in a plan view).

Subsequently, as shown in FIG. 10, the pilot lines 31 and 32 are lowered onto the roof 11 by contracting each operating rod 43, whereby the pilot lines 31 and 32 are hung (installed) on the roof 11. .. As a result, the pilot lines 31 and 32 are hung on the roof 11 in a state of straddling both sides of the eaves 13. After this work, the pilot lines 31 and 32 are removed from the operating rods 43. In this case, each eaves 13 corresponds to a pair of roof edge portions that face each other and extend in parallel in a plan view.

Next, the anchor installation process is performed. FIG. 11 is a perspective view showing an anchor installation process. As shown in FIG. 11, in the anchor installation step, a plurality of (four) anchors 25 are installed around the building 10. In this work, two anchors 25 are arranged on both sides of the eaves 13 in a plan view with the same spacing (see also FIG. 1 (b)).

Next, the rope pulling process is performed. 12A and 12B are perspective views showing a rope pulling process, and FIG. 12B is a side view showing the process.

As shown in FIG. 12A, in the rope pulling process, the pilot lines 31 and 32 hung on the roof 11 are pulled from the tip side opposite to the side to which the main ropes 21 and 22 are connected. The work of pulling up each of the main ropes 21 and 22 onto the roof 11 is performed. In this work, as shown in FIG. 12B, the main ropes 21 and 22 are pulled up onto the roof 11 so that the main ropes 21 and 22 straddle both sides of the eaves 13. As a result, the connecting portions 23 of the main ropes 21 and 22 are placed on the roof 11, and the rope portions 21a and 21b extending from the connecting portions 23 in the main rope 21 hang down from different eaves 13. At the same time, the rope portions 22a and 22b extending from the connecting portion 23 in the main rope 22 are in a state of hanging downward from different eaves 13. Further, in this case, the rope portions 21a and 22a of the main ropes 21 and 22 hang down from the same eaves 13, and the rope portions 21b and 22b of the main ropes 21 and 22 hang down from the same eaves 13. It becomes a state.

Further, in the rope pulling step, the main ropes 21 and 22 are pulled up on the roof 11 so that the connecting portions 23 of the main ropes 21 and 22 are located in the ridge 12 of the roof 11. In this case, the positions of the second markers 28b attached to the rope portions 21a and 21b of the master rope 21 are at the same height position, and the second markers 22a and 22b attached to the rope portions 22a and 22b of the master rope 22. The main ropes 21 and 22 are pulled up so that the positions of the two markers 28b are at the same height. As a result, the main ropes 21 and 22 are pulled up on the roof 11 so that the connecting portion 23 is located in the ridge 12.

Further, as each of the main ropes 21 and 22 is pulled up on the roof 11, the elevating rope 26 connected to the connecting portion 23 is also pulled up on the roof 11. The elevating rope 26 is arranged so as to hang downward from the eaves 13 together with the rope portions 21a and 22a of the main ropes 21 and 22.

Here, in the above-mentioned rope pulling step, one end side of each of the main ropes 21 and 22 connected to the pilot lines 31 and 32 becomes the tip side, and each of the main ropes 21 and 22 is pulled up on the roof 11. .. In this case, when the main ropes 21 and 22 are pulled up, it is assumed that one end side of each main rope 21 and 22 is caught at the eaves 13 of the roof 11. For example, it is assumed that the eaves 13 itself may be caught or a member such as a rain gutter arranged along the eaves 13 may be caught. In that respect, in the above configuration, since the loop 35 is formed on one end side of each of the main ropes 21 and 22, the main ropes 21 and 22 can be pulled up on the roof 11 with the loop 35 as the tip. Therefore, it is possible to prevent one end side of each of the main ropes 21 and 22 from being caught at the eaves 13 when the main ropes 21 and 22 are pulled up.

By the way, as described above, even if the loop 35 suppresses the catching on the eaves 13, it is assumed that the hooking may occur depending on the shape of the roof 11 (the eaves 13), the members arranged on the eaves 13, and the like. NS. Therefore, in the following, a method of resolving the case where the eaves 13 is caught will be described with reference to FIG. FIG. 13 is a diagram illustrating a method of resolving the case where one end side of the main ropes 21 and 22 is caught at the eaves tip 13.

FIG. 13A shows a state in which one end side of each of the main ropes 21 and 22 is caught at the eaves 13 when the main ropes 21 and 22 are pulled up onto the roof 11. In this example, the top 37 of the loop 35 formed on one end side, that is, the top 37 which is a connecting portion connected to the pilot line 31, is hooked on the eaves 13. Therefore, even if the pilot lines 31 and 32 are pulled by hand and pulled, the main ropes 21 and 22 cannot be pulled up on the roof 11.

Therefore, in such a case, as shown in FIG. 13B, of the pilot lines 31 and 32, the pilot line 31 connected to the top 37 is stopped to be pulled, and in that state, a loop is performed. The pilot line 32, which is connected to the connection portion 23 side rather than the 35, is pulled. As a result, the loop 35 is lifted from the connection portion 23 side of the loop 35 (that is, from below the loop 35), whereby the catch on the top 37 of the loop 35 is eliminated.

After the catch is cleared, the pilot line 31 connected to the top 37 is pulled up as shown in FIG. 13 (c). As a result, the loop 35 is placed on the roof 11, and after that, the main ropes 21 and 22 are pulled up on the roof 11 while pulling both pilot lines 31 and 32.

After performing the rope pulling process, the pilot lines 31 and 32 are removed from one end side of the main ropes 21 and 22, and the adhesive tape 34 that temporarily fixes one end side of each main rope 21 and 22 is removed and the temporary fixing is performed. unlock.

Next, a rope tensioning process is performed. FIG. 14 is a perspective view showing a rope tensioning process.

As shown in FIG. 14A, in the rope tensioning step, the rope portions 21a and 21b of each master rope 21 are moved along the eaves 13, and the rope portions 22a and 22b of each master rope 22 are moved along the eaves 13. 21 and 22 of each main rope are arranged on the roof 11 so as to form an X shape in a plan view. In this case, when moving the rope portions 21a, 21b, 22a, 22b (hereinafter, abbreviated as rope portions 21a to 22b), the rope portions 21a to 22b are lifted upward from the roof 11 by the operating rod 43 (hereinafter, the rope portions 21a to 22b are lifted upward from the roof 11). The rope portions 21a to 22b are moved in the state of being separated from each other. Further, the rope portions 21a to 22b are lifted by the operating rod 43 in a state where the rope portions 21a to 22b are hooked on the hook 44 at the tip of the operating rod 43.

In the rope tensioning step, as shown in FIG. 14B, both ends of each of the main ropes 21 and 22 are connected to the anchor 25 in a state where the main ropes 21 and 22 are arranged in an X shape in a plan view. do. As a result, the main ropes 21 and 22 are fixed to the anchor 25, and the main ropes 21 and 22 are installed on the roof 11 in an X-shape. In this case, the main ropes 21 and 22 are arranged on the roof 11 in a state of being linearly extended in a direction in which the eaves 13 and the fluffy 14 are inclined in a plan view (FIG. 1 (FIG. 1). See also b)). Further, in this case, the main ropes 21 and 22 are stretched in an X shape on the roof 11 so as to have a symmetrical shape centered on the connecting portion 23.

Next, the roof moving step is performed. FIG. 15 is a perspective view showing a roof moving process.

As shown in FIG. 15, in the roof moving step, the worker moves onto the roof 11 using the ladder 27. In this case, first, the ladder 27 is installed along the elevating rope 26 in a state of leaning against the eaves 13 of the roof 11. After that, the worker moves up the ladder 27 to the roof 11 with the safety belt 24 attached.

When the worker climbs the ladder 27, the elevating rope 26 is used. In this case, the worker's safety belt 24 and the elevating rope 26 are connected by a fall prevention connector (not shown), and the worker climbs the ladder 27 in the connected state. As for the connecting tool, the rope connecting portion connected to the elevating rope 26 can slide along the elevating rope 26. Further, the rope connecting portion is provided with a regulating function (stopper function) for regulating the displacement when a sudden downward displacement along the elevating rope 26 occurs. As a result, when the worker falls from the ladder 27, the regulation function works to prevent the worker from falling to the ground.

Further, after climbing on the roof 11, the worker moves on the roof 11 along the elevating rope 26 to the building 12. That is, at this time, the worker moves to the position where the connecting portion 23 of each of the main ropes 21 and 22 is arranged.

Next, a safety belt connection step is performed. FIG. 16 is a perspective view showing a safety belt connecting process.

As shown in FIG. 16, in the safety belt connecting step, the worker's safety belt 24 is connected to the connecting portions 23 of the main ropes 21 and 22. In this work, the safety belt 24 and the connecting portion 23 are connected via a rope-shaped connecting member 47 (lifeline). One end of the connecting member 47 is attached to the safety belt 24. Further, a block-shaped connecting portion 47a is provided at the other end of the connecting member 47, and the connecting portion 47a is attached in a state of being hooked on the loop 29 of the connecting portion 23.

After the safety belt connecting step, the connector connecting the safety belt 24 and the elevating rope 26 is removed. Further, a protective member 49 (see FIG. 1A) for protecting the main ropes 21 and 22 is attached to the portion of each main rope 21 and 22 that is in contact with the eaves tip 13. With the above, the installation work of each master rope 21 and 22 is completed.

According to the configuration of the present embodiment described in detail above, the following excellent effects can be obtained.

Two main ropes 21 and 22 were stretched on the roof 11 of the building 10 so as to form an X shape in a plan view while being connected at an intermediate portion between the two main ropes 21 and 22. Then, the worker's safety belt 24 is connected to the connecting portion 23 of each of the main ropes 21 and 22 stretched on the roof 11. In this case, when the worker falls from any of the four sides of the roof 11, the falling load (falling load) is dispersed and applied to the two main ropes 21 and 22. Therefore, damage to the main ropes 21 and 22 due to the drop load can be reliably prevented, and as a result, the safety of work on the roof 11 using the main ropes 21 and 22 can be enhanced.

An elevating rope 26 used when an operator uses a ladder 27 to climb on the roof 11 is connected to the connecting portion 23 of each of the main ropes 21 and 22. In this case, the elevating rope 26 can be used until the worker climbs the roof 11 using the ladder 27 and then moves on the roof 11 to the connecting portion 23. As a result, a series of movements can be safely performed until the safety belt 24 worn by the operator is connected to the connecting portion 23.

Pilot lines 31 and 32 are first hung on the roof 11, and then the pilot lines 31 and 32 are pulled together with one end side of each of the main ropes 21 and 22 connected to the pilot lines 31 and 32. 22 was pulled up on the roof 11. At this time, the main ropes 21 and 22 were pulled up on the roof 11 so as to straddle both sides of the pair of eaves 13 facing each other. Then, after that, by moving the pair of rope portions 21a, 21b (22a, 22b) extending from the connecting portion 23 in each master rope 21 and 22 along the eaves tip 13, each master rope 21 and 22 is X in a plan view. I tried to stretch it in a shape. In this case, when moving the rope portions 21a, 21b, 22a, 22b, the rope portions 21a, 21b, 22a, 22b are moved from the eaves 13 to the adjacent fluff 14 with the corners of the eaves 13 and the roof 11 in between. No need. Therefore, when the rope portions 21a, 21b, 22a, 22b are moved, it is possible to prevent the rope portions 21a, 21b, 22a, 22b from being caught in the corners of the roof 11 and becoming difficult to move. As a result, the work can be easily performed in stretching each of the main ropes 21 and 22 in an X shape.

When pulling up each main rope 21 and 22 onto the roof 11, two pilot lines 31 and 32 were used to pull up. Specifically, each master rope 21 is connected to the loop 35 at one end side of each master rope 21 and 22 and the other pilot line 32 is connected to the connection portion 23 side of the loop 35. , 22 was pulled up. In this case, when one end side (loop 35) of each of the main ropes 21 and 22 is caught at the eaves 13 when the main ropes 21 and 22 are pulled up, the catch is eliminated by the above-mentioned procedure described with reference to FIG. can do. Therefore, when pulling up each of the main ropes 21 and 22, even if the eaves 13 is caught, the catch can be quickly resolved, and as a result, the work of pulling up each of the main ropes 21 and 22 can be performed quickly. can.

When the pilot lines 31 and 32 are hung on the roof 11, two people holding the pilot lines 31 and 32 on the two operating rods 43 at a position higher than the roof 11. The pilot lines 31 and 32 can be hung on the roof 11 by each of the workers moving along the eaves 13 and the like. In this case, since the work of hanging the pilot lines 31 and 32 on the roof 11 can be performed near the building 10, even if the site of the building 10 is small and a work space cannot be secured so much around the building 10, the pilot lines 31 and 32, 32 can be hung on the roof 11 relatively easily.

The present invention is not limited to the above embodiment, and may be implemented as follows, for example.

In the above embodiment, in the temporary fixing step, one end side of each master rope 21 and 22 is temporarily fixed in a state where the loop 35 is formed, but one end side of each master rope 21 and 22 is aligned without forming the loop 35. It may be temporarily fixed in a free state. Even in that case, it is possible to pull each of the main ropes 21 and 22 onto the roof 11 by connecting the pilot line to one end side of each of the temporarily fixed main ropes 21 and 22 and pulling the pilot line in that state. be.

-In the above embodiment, in the rope pulling process, the main ropes 21 and 22 are pulled up on the roof 11 by using two pilot lines 31 and 32, but this is changed and only one pilot line is pulled up. It may be connected to one end side of the main ropes 21 and 22, and each main rope 21 and 22 may be pulled up on the roof 11 by using one pilot line thereof.

-In the above embodiment, the rope portions 21a, 21b, 22a, 22b of the main ropes 21 and 22 hang down from the eaves 13 respectively, and the main ropes 21 and 22 are arranged in a plan view X shape on the roof 11. It was arranged so as to form a shape, but by changing this, each main rope 21 and 22 was roofed so that the rope parts 21a, 21b, 22a, 22b of each main rope 21 and 22 hung downward from 14 if they were sewn. It may be arranged so as to form an X-shape in a plan view on 11.

-In the above embodiment, the main ropes 21 and 22 are arranged in an X shape on the roof 11 so as to have a symmetrical shape centered on the connecting portion 23 in a plan view. However, the main ropes 21 and 22 are arranged in an X shape. The X-shape formed by the roof does not necessarily have to be symmetrical, and may be asymmetrical. For example, in the above embodiment, the distance between the main ropes 21 and 22 at one eaves 13 and the distance between the main ropes 21 and 22 at the other eaves 13 are the same distances. May be different from each other to form an asymmetric shape. In this case as well, if each of the main ropes 21 and 22 has a substantially X shape as a whole, the drop load when the worker falls from the roof 11 will act on each of the main ropes 21 and 22 respectively. Therefore, it is possible to obtain the effect of surely suppressing the damage of the main ropes 21 and 22 due to the drop load.

-For example, the main ropes 21 and 22 may be individually hung on the roof 11 without being connected, and then the main ropes 21 and 22 may be connected on the roof 11 at an intermediate portion between the two. In this case, after the connection, the rope tensioning step of tensioning each of the main ropes 21 and 22 in an X shape is performed. However, since the connection work of the main ropes 21 and 22 on the roof 11 is not preferable in terms of safety and the like, the connection work of the main ropes 21 and 22 covers the main ropes 21 and 22 as in the above embodiment. It is desirable to do this before placing it on 11.

-In the above embodiment, in the pilot line installation process, the pilot lines 31 and 32 are hung on the roof 11 by two workers using two operation rods 43, but the pilot lines 31 and 32 are placed on the roof 11. It is not always necessary to perform the work to be applied in this way. For example, the tip of the pilot line is connected to the tip of one operating rod 43, the operating rod 43 is extended in the connected state, and the pilot line is placed on the roof 11 by operating the operating rod 43. As described above, a method is conceivable in which the operator moves around the building 10 to hang the pilot line on the roof 11. In this case, one worker can hang the pilot line on the roof 11.

-In the above embodiment, the main rope installation method of the present invention is applied to the gable roof 11, but the main rope installation method of the present invention is applied to a ridge type roof, a one-sided flow type roof, a flat roof and the like. May be good.

10 ... building, 11 ... roof, 13 ... eaves as roof edge, 21 ... master rope, 21a, 21b ... rope, 22 ... master rope, 22a, 22b ... rope, 23 ... connection, 24 ... safety Belt, 26 ... Lifting rope, 27 ... Ladder, 31 ... Pilot line, 32 ... Pilot line, 35 ... Loop, 37 ... Top, 43 ... Operating rod.

Claims (6)

A rope tensioning process in which two main ropes are stretched on the roof of a building so as to form an X shape in a plan view while being connected at the middle of each other.
A method for installing a master rope, which comprises, after the rope tensioning step, a safety belt connecting step of connecting a safety belt to a connecting portion to which each master rope is connected. The master rope installation method according to claim 1, wherein the connecting portion includes a lifting rope connecting step for connecting a lifting rope used when an operator uses a ladder to climb on the roof. A pair of roof edge portions extending in parallel with each other are formed on the roof in a plan view.
As a step to be performed before the rope tensioning step,
A pilot line installation process in which the pilot line is hung on the roof so as to straddle both sides of each roof edge.
In a state where one end side of each of the main ropes connected at the connection portion is connected to the pilot line, the pilot line hung on the roof is pulled by hand to connect the main ropes to the roof edge portions. It is provided with a rope pulling step of pulling up on the roof so as to straddle both sides of the sandwich and to place the connecting portion on the roof.
In the rope tensioning step, by moving a pair of rope portions extending from the connecting portion to the opposite side in each of the master ropes along the roof edge portion, the master ropes are moved in a plan view in an X shape. The method for installing a master rope according to claim 1 or 2, wherein the main rope is arranged in. A temporary fixing step for temporarily fixing one end side of each master rope is provided.
In the temporary fixing step, a loop is formed by folding back the main ropes at one end side in a aligned state, and the temporary fixing is performed so that the loop is held.
3. The rope pulling step is characterized in that the pilot line is connected to one end side of each of the temporarily fixed main ropes, and the main ropes are pulled up onto the roof. How to install the main rope described in. In the pilot line installation process, the two pilot lines are hung on the roof.
In the rope pulling step, one of the pilot lines is connected to the loop on the one end side of each master rope, and the other is connected to the connection portion side of the loop, and the pilot lines are connected. The method for installing a main rope according to claim 4, wherein each main rope is pulled up onto the roof by pulling it up. In the pilot line installation step, the pilot lines are hung on two operating rods and held at a position higher than the roof, and each of the operating rods is moved to both sides of the roof edge portion. 3. The method of installing a master rope according to any one of 5.

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