Fall prevention facility and fall prevention method

Abstract

To provide a fall prevention facility and a fall prevention method that enable easy installation and have high safety.SOLUTION: The present invention is a fall prevention facility 10 including: a plurality of lashing belts 12a and 12b provided with annular metal fittings (13, 14); and two main ropes 15 and 17 having different color patterns and having hooks (16, 18) in both ends. The lashing belts 12a and 12b are respectively wound and tightened around two poles 11a and 11b adjacent to each other in a building. In each of the main ropes 15 and 17, one hooks 16a and 18a are connected to annular metal fittings 13a and 14a of the lashing belt 12a wound and tightened around one pole 11a of two poles, and the other hooks 16b and 18b are connected to annular metal fittings 13b and 14b of the lashing belt 12b wound and tightened to the other pole 11b, and thereby, the two main ropes 15 and 17 are arranged across the two poles 11a and 11b in parallel.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to fall prevention equipment and a fall prevention method. [Background technology]

[0002] At construction sites of high-rise buildings, workers at height wear full-body safety harnesses to ensure their safety, and a lanyard connected to the safety harness is attached to a lifeline (a fall prevention rope) to prevent falls. Patent Document 1 proposes fall prevention equipment that can reduce sudden tension applied to the lifeline and prevent damage to the support pole, as well as a support pole that can reduce tension applied to the lifeline. Typically, life ropes are strung on life rope posts attached to the structure. Life rope posts are often installed at the work site, taking into consideration space for delivery trucks and transportation efficiency due to stacking of steel frames. For this reason, for example, Patent Document 2 proposes a life rope post that can reduce the burden of installation and removal work.

[0003] One method for installing exterior units on high-rise buildings involves first preparing the units on the work floor, then using a crane or similar device installed on the floor directly above the work floor to lift the units out of an opening in the building. Workers then connect the units to the already-installed exterior panels on the floor below at the edge of the slab at the opening. Because installing lifeline supports is difficult when working in such locations, it is common to install lifeline supports on steel column pieces or use commercially available temporary handrails (such as Beaugorail). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-022748 [Patent Document 2] Patent Publication No. 2021-085240 Summary of the Invention [Problem to be solved by the invention]

[0005] However, stepladders, ladders, etc. are required to install and remove the H-beam flanges in the ceiling. If a stepladder or ladder were to fall, there is a concern that the worker installing the lifeline support would fall through the opening at the end of the slab. Furthermore, the lifeline is equipped with a locking mechanism to prevent the safety block rope from being pulled out in the event of a fall. The effective range of this locking mechanism is within a 15° range (conical) from the vertical, and its effectiveness is not guaranteed beyond this range. Therefore, the installation location of the safety block must be carefully planned, and it is difficult to cover the entire work area within the normal range of use. In addition, since the Temporary Construction Industry Association stipulates that only one worker can be attached to each main rope, if multiple people are working at the end of a slab, there will be multiple attachment points.Furthermore, the main rope and its installation location must be installed in a safe location so that it does not become entangled with other workers. The present invention has been made in consideration of the above circumstances, and aims to provide a fall prevention device and a fall prevention method that are easy to install and highly safe. [Means for solving the problem]

[0006] The inventor discovered that the above problem could be solved by using pillars of structural components of the building as substitutes for life rope supports, and by installing at least two life ropes of different colors and patterns in parallel, and thus arrived at the present invention. That is, the present invention provides the following means. [1] A fall prevention system comprising a plurality of lashing belts each equipped with at least one ring fitting, and a plurality of life ropes of different colors and patterns each having a hook on each end, wherein the lashing belts are wound around at least one of two adjacent pillars of a building, and each life rope has a hook at one end connected to the ring fitting of the lashing belt wound around one of the two pillars, and a hook at the other end connected to the ring fitting of the lashing belt wound around the other pillar, such that the plurality of life ropes are installed in parallel between the two pillars. [2] A fall prevention method comprising the steps of: winding a plurality of lashing belts, each equipped with at least one ring fitting, around two adjacent pillars of a building, at least one of the pillars; preparing a plurality of life ropes of different colors and patterns, each having a hook on both ends and a tensioning device on one end; connecting one hook of each life rope to the ring fitting of the lashing belt wound around one of the two pillars and the other hook to the ring fitting of the lashing belt wound around the other pillar, thereby erecting the plurality of life ropes in parallel from one pillar to the other pillar; and attaching one lanyard to each life rope by the hook. [3] A fall prevention method as described in [2], in which the color and pattern of the lanyard is the same as the color and pattern of the main rope to which it is attached. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a fall prevention device and a fall prevention method that are easy to install and highly safe. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a front view showing an embodiment of the fall prevention equipment of the present invention. [Figure 2] FIG. 2 is a detailed view of one of the pillar portions in FIG. 1. [Figure 3] FIG. 2 is a detailed view of the other pillar portion in FIG. 1. [Figure 4]FIG. 1 is a side view illustrating an embodiment of the installation of exterior panels on a high-rise building. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0010] [Fall prevention equipment] As shown in FIG. 1, the fall prevention equipment 10 of this embodiment is installed between a pillar 11a and an adjacent pillar 11b, which are structural members of a building. Specifically, it comprises a lashing belt 12a provided with two annular metal fittings 13a and 14a, a lashing belt 12b provided with two annular metal fittings 13b and 14b, a main rope 15 having hooks 16a and 16b at both ends and a tensioner 15A at one end, and a main rope 17 having hooks 18a and 18b at both ends and a tensioner 17A at one end. The main rope 15 and the main rope 17 are different in color and pattern.

[0011] The lashing belts 12a and 12b are wound around two adjacent pillars 11a and 11b of the building, respectively.

[0012] The hook 16a at one end of the main rope 15 is connected to the annular metal fitting 13a of the lashing belt 12a wound around the pole 11a, as shown in Figure 2. The hook 16b at the other end of the main rope 15 is connected to the annular metal fitting 13b of the lashing belt 12b wound around the other pole 11b, as shown in Figure 3. Furthermore, as shown in Figure 2, a hook 18a at one end of the main rope 17 is connected to the annular metal fitting 14a of the lashing belt 12a wound around the pole 11a. As shown in Figure 3, a hook 18b at the other end of the main rope 17 is connected to the annular metal fitting 14b of the lashing belt 12b wound around the other pole 11b. In this way, the two life ropes 15 and 17 are installed in parallel between the two pillars 11a and 11b.

[0013] (Lashing belt) The lashing belts 12a and 12b used in this embodiment may be known lashing belts suitable for construction sites. For example, one end of the belt is fixed to a ratchet buckle, and the other free end is fixed by wrapping it around the ratchet buckle with a ratchet handle. The width of the lashing belts 12a and 12b is preferably, for example, 40 mm to 100 mm, and the length of the lashing belts 12a and 12b is preferably 3 m to 10 m. The load capacity of the lashing belts 12a and 12b is preferably 200 kg or more.

[0014] In this embodiment, one lashing belt 12a or 12b is wrapped around one pillar 11a or 11b, but two lashing belts may be used, wrapped around one pillar at the top and bottom, and one annular metal fitting may be inserted through each lashing belt.

[0015] As shown in Figure 1, the lashing belts 12a and 12b are preferably installed at a height h that does not restrict work at the opening. For example, they are preferably installed at least 160 cm above the slab (floor), and more preferably at a position slightly higher than the height of an average worker (for example, about 180 cm). Furthermore, if the lashing belts are installed too high, a temporary workbench or other structure will be required to install the lashing belts themselves, increasing the risk of tripping and falling, so a height of 160 cm or more and 180 cm or less is preferable. Here, the height from the slab means the height from the slab surface when no temporary floor is used.

[0016] (ring fitting) The annular metal fittings 13 and 14 are preferably foldable D-rings (see FIG. 2). Foldable D-rings are preferred because they can be fitted to the corners of the pillars to more firmly fasten the lashing belt 12. Furthermore, it is more preferred that the annular metal fittings 13 and 14 are equipped with magnets, which can be attached to the H-shaped steel of the pillars 11a and 11b to facilitate positioning. Furthermore, since the annular metal fittings 13 and 14 are used to install two main ropes 15 and 17 in parallel, when there is only one lashing belt 12a, as shown in Figure 2, it is preferable to insert the two annular metal fittings 13a and 14a and arrange them in series. In this embodiment, as shown in Figure 2, two annular metal fittings 13a and 14a are inserted into one lashing belt 12a, but one annular metal fitting or three or more annular metal fittings may be inserted.

[0017] (Main rope) In the present invention, at least two life ropes of different colors and patterns are used. Since only one worker can hang a lanyard hook on each life rope, if multiple workers are in the same work area, life ropes of the same color can prevent multiple workers from accidentally hanging their lanyard hooks on the same life rope. For example, if two life ropes are used, a combination of yellow and red can be used to improve visibility at the work site. Furthermore, to further facilitate identification of the life ropes, it is preferable to use one life rope of a single color and the other with multi-colored threads such as stripes.

[0018] Known ropes can be used as the master ropes 15 and 17. It is preferable to use ropes that have hooks on both ends and tensioners 15A and 17A on one end to adjust the tension of the master ropes 15 and 17. The diameter and length of the main ropes 15 and 17 can be selected according to the work site; for example, products equivalent to those certified by the Temporary Construction Industry Association are preferable, and a length that allows installation within a distance of 10 m between supports can be used.

[0019] The fall prevention equipment 10 of this embodiment can be easily installed by a worker and can provide high safety when working at height.

[0020] [Fall prevention method] The fall prevention method of this embodiment is a method using the fall prevention equipment 10. Specifically, the method includes the steps of winding and fastening at least one lashing belt, each equipped with at least one annular metal fitting, around each of two adjacent pillars of a building (hereinafter referred to as step A), preparing multiple life ropes of different colors and patterns that have hooks on both ends (hereinafter referred to as step B), connecting the hook at one end of each life rope to the annular metal fitting of the lashing belt wound around one of the two pillars and the hook at the other end to the annular metal fitting of the lashing belt wound around the other pillar, thereby installing the multiple life ropes in parallel from one pillar to the other pillar (hereinafter referred to as step C), and attaching one lanyard to each life rope with a hook (hereinafter referred to as step D). Each step will be explained below, but the elements used will be the same as those explained in the fall prevention equipment 10 above.

[0021] (Process A) Process A involves wrapping and fastening at least one lashing belt, each equipped with at least one annular metal fitting, around two adjacent pillars of a building. For example, as shown in Figure 1, wrapping and fastening lashing belt 12a around pillar 11a can be performed efficiently by attaching, for example, magnetic annular metal fitting 13a or 14a to the desired height h of the H-shaped steel of pillar 11a in advance, and then inserting the belt along the guide of annular metal fitting 13a or 14a. Furthermore, during the wrapping and fastening process, it is important to securely wrap and fasten lashing belt 12a around pillar 11a because, in the event of an accident, a high load will be applied to lashing belt 12a via the life rope. Next, the lashing belt 12b is fixed to the other pole 11b in the same manner. The installation height h of the lashing belts 12a and 12b is as described above.

[0022] (B process) Process B is a process for preparing a master rope 15 having hooks 16a and 16b at both ends, and a master rope 17 having a different color and pattern from the master rope 15 and having hooks 18a and 18b at both ends. The master ropes 15 and 17 can be those described above for the fall prevention equipment 10. Process B can be carried out in any order relative to Process A, the lashing belt winding and tightening process. Process B can also be carried out in parallel with Process A.

[0023] (C process) Process C is the process of connecting the hook at one end of each main rope to the ring fitting of the lashing belt wrapped around one of the two pillars, and connecting the hook at the other end to the ring fitting of the lashing belt wrapped around the other pillar, thereby erecting multiple main ropes in parallel from one pillar to the other. Specifically, as shown in Fig. 2, hook 16a at one end of the life rope 15 is connected to the annular metal fitting 13a of the lashing belt 12a wound around the pole 11a as shown in Fig. 2. Then, hook 16b at the other end of the life rope 15 is connected to the annular metal fitting 13b of the lashing belt 12b wound around the other pole 11b as shown in Fig. 3. Finally, the tension of the life rope is adjusted with tensioning machine 15A. Next, hook 18a at one end of the life rope 17 is connected to the annular metal fitting 14a of the lashing belt 12a wound around the pole 11a, as shown in Figure 2. Then, hook 18b at the other end of the life rope 17 is connected to the annular metal fitting 14b of the lashing belt 12b wound around the other pole 11b, as shown in Figure 3. Finally, the tension of the life rope is adjusted with tensioner 17A. In this way, the life ropes 15 and 17 are installed in parallel between the two pillars 11a and 11b.

[0024] (D process) In step D, one lanyard is attached to each main rope by a hook. A lanyard is attached to a full harness safety belt and consists of a rope and a hook at the end of the rope (see lanyard 42 in Figure 4). It is preferable that the color and pattern of the lanyard be the same as the lifeline to which it is attached. This prevents two people from accidentally having their lanyards attached to one lifeline. It is also preferable that the hook on the lanyard be the same color and pattern as the lanyard and lifeline, as this helps prevent the lanyard from being attached to the wrong person.

[0025] [Work example] Next, an embodiment of work using the fall prevention equipment 10 of this embodiment will be described with reference to FIG. 4 is a schematic diagram showing the installation of exterior panels on a high-rise building using fall prevention equipment 10 of the present invention. On floors nF and (n-1)F, lashing belts 12 are wound and fastened around pillars 11 and the pillar 11 at the back of the page. Two life ropes (not shown) are installed in parallel on ring metal fittings (not shown) inserted through the lashing belts 12. The pillars 11 may be, for example, H-shaped steel beams. On floor nF, the exterior panel 22 is prepared by being placed on a cart 21. Then, the exterior panel 22 is connected to a rope 33 hung on a hook 32 of a crane unit 31 of a crab crane 30 installed on floor (n+1)F, and is lifted out through an opening 43. At this time, a worker 40 assists in lifting out the exterior panel 22 from the opening 43 while supporting the exterior panel 22 placed on the cart 21. At this time, the installation position of the lashing belt 12 is determined taking into consideration the height when the exterior panel 22 is suspended. The specific numerical ranges are as described above.

[0026] Worker 40 wears a full safety harness belt 41 for safety purposes as he works near opening 43, and a lanyard 42 is attached to full safety harness belt 41. Lanyard 42 is hung with a hook on a life rope of the same color as lanyard 42. To simplify the illustration, the worker on the far side of exterior panel 22 is not shown, but his lanyard is hung on another life rope.

[0027] Furthermore, on floor (n-1)F, worker 50 is performing work to join the exterior panel 22A that has been lifted out. Because worker 50 will be working near the edge of the slab at opening 53, worker 50 is wearing a full harness safety belt 51 for safety, and a lanyard 52 is attached to full harness safety belt 51. Lanyard 52 is hung by a hook from a lifeline (not shown) of the same color and pattern as lanyard 52.

[0028] In this way, when working at height near the end of a slab, two workers can have their lanyards attached to separate lifelines, which prevents the other worker from being caught in the accident if one worker falls, and prevents the two workers from colliding with each other in the event of a fall.

[0029] [Fall prevention equipment set] The fall prevention equipment set of the present invention comprises a plurality of lashing belts each provided with at least one ring fitting, and a plurality of life ropes of different colors and patterns each having a hook on each end. The rings, lashing belts, and lifelines in the fall prevention equipment set of the present invention can be those described above. With the fall prevention equipment set of the present invention, fall prevention equipment can be prepared in advance as an equipment set at high-altitude work sites, allowing work at the work site to be carried out efficiently. [Explanation of symbols]

[0030] 10 Fall prevention equipment 11(11a, 11b) Pillar 12(12a, 12b) Lashing belt 13(13a, 13b), 14(14a, 14b) Annular metal fittings 15, 17 Main rope 15A, 17A tension machine 16(16a, 16b), 18(18a, 18b) hook 20 Slab (floor) 21 Cart 22, 22A exterior panel h height 40, 50 workers 41, 51 Full harness safety belt 42, 52 lanyards

Claims

1. a plurality of lashing belts each provided with at least one annular metal fitting; A plurality of life ropes of different colors and patterns each having a hook at each end; Equipped with At least one lashing belt is wound around each of two adjacent pillars of a building, The hook at one end of each of the main ropes is connected to the ring fitting of the lashing belt wrapped around one of the two pillars, and the hook at the other end is connected to the ring fitting of the lashing belt wrapped around the other pillar, thereby causing the multiple main ropes to be installed in parallel between the two pillars, creating a fall prevention facility.

2. A process of winding and fastening a plurality of lashing belts, each having at least one annular metal fitting, around two adjacent pillars of a building, at least one of the lashing belts being provided thereon; A step of preparing a plurality of life ropes of different colors and patterns, each having a hook at each end and a tensioning device at one end; a step of connecting one hook of each of the main ropes to a ring fitting of the lashing belt wound around one of the two poles and connecting the other hook to a ring fitting of the lashing belt wound around the other pole, thereby installing the multiple main ropes in parallel from the one pole to the other pole; a step of fastening one lanyard to each of the life ropes by a hook; A fall prevention method having the following.

3. A fall prevention method according to claim 2, wherein the color and pattern of the lanyard are the same as the color and pattern of the lifeline to which it is attached.

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