High-altitude work components and high-altitude work method

Abstract

To provide a member for aerial work that is used by hanging it, which makes it possible to perform an aerial work more safely and easily, and also makes it possible to work in a narrow space.SOLUTION: There is provided a member for aerial work 1 including a vertical member 11, a horizontal member that intersects the vertical member 12, and a frame body 10 having outer frame members 13a and 13b to which at least one of the horizontal member and the vertical member is connected, and a plurality of closed spaces S1 to S5 are formed therein. The lower portion of the frame body is tapered, and a hanging support portion 21 for supporting the hanging tool for suspending the frame body is formed in the center of the upper portion of the frame body.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a member for high-altitude work that is used in a suspended state, and a method for high-altitude work using the member for high-altitude work. [Background technology]

[0002] For some time now, in order to carry out work at height, such as pruning trees, a cage (sometimes called a "gondola") has been hung from the hook of a crane, and workers have been allowed to ride inside the gondola to carry out work at height. According to the Crane Safety Regulations, in principle, workers cannot be transported or hung from a mobile crane to carry out work, but Article 73 of the same regulations stipulates that, in certain cases only, a dedicated boarding device can be hung from the hook of a crane, and workers can ride on this boarding device to carry out work.

[0003] However, when working inside the cage, there is a risk that the worker may be thrown out of the cage if the cage hits an external object such as a tree branch and tilts or falls over.

[0004] In addition, because the hanging basket is bulky, it is difficult to fit it into small spaces, making it impossible to perform the desired task in such a small space, or requiring additional work such as cutting down extra branches to make space for the hanging basket to fit through.

[0005] Furthermore, the range of work is limited to the reach of the worker's arms while standing inside the hanging cage. Therefore, in order to work over a wide range, the hanging cage needs to be moved frequently, and the work of moving the entire hanging cage is cumbersome. In addition, when working while standing inside the hanging cage, the worker has to stretch his arms higher than the handrail of the hanging cage. Raising his arms higher than the base of his arms is physically demanding for the worker, causing him to become very tired, and it is difficult to apply force when using heavy objects such as chainsaws, making it difficult to work. In addition, the Ministry of Health, Labor and Welfare's "Guidelines for Safety in Felling and Other Work Using Chainsaws" states that the basic posture for working with a chainsaw is that the chainsaw should not be raised higher than the shoulders, but when the worker stretches his arms beyond the handrail of the hanging cage, the chainsaw tends to be higher than the shoulders, which is dangerous. In addition, when cutting branches at a high position, there is a risk that the cut branches will swing and hit the worker. Summary of the Invention [Problem to be solved by the invention]

[0006] In view of the above-mentioned circumstances, an object of the present invention is to provide a component for working at height that is used by being suspended, making work at height safer and easier and enabling work to be done even in small spaces, and a method for working at height using the component for working at height. [Means for solving the problem]

[0007] In order to solve the above problems, the member for working at height according to the present invention comprises: "A frame body having vertical members, horizontal members intersecting the vertical members, and an outer frame member to which at least one of the horizontal members and the vertical members is connected, and having a plurality of closed spaces formed therein, The lower portion of the frame body is tapered, A suspension support portion for supporting a suspension tool for suspending the frame body is formed at the center of the upper portion of the frame body, The frame body includes a protruding member protruding from the cross member without closing the closed space. 、 The protruding member protrudes upward when the frame body is suspended, The base of the protruding member is a portion that serves as an anchor point by winding a rope that is passed through both the closed space from which the protruding member protrudes and the closed space adjacent to the closed space. " It is something like that.

[0008] By configuring the member for high-altitude work in this manner, it becomes possible to attach a suspending tool for suspending the member for high-altitude work to the suspending support part and then perform work in high-altitude work by the following method. "A method for working at height using the above-described member for working at height, a first rope and a second rope, The first rope is U-shaped with both ends fastened to both sides of the worker's torso and is equipped with a first length adjuster, The second rope is a rope that is looped by fastening both ends to the abdomen of the worker, or a rope that is fastened to the abdomen of the worker at one end and has a loop-shaped portion at the other end that can be opened and closed, and is equipped with a second length adjuster; The first rope is passed through both of the two adjacent closed spaces in the member for working at height, The second rope is passed through both of two adjacent closed spaces in a combination different from the closed space through which the first rope is passed, among the multiple closed spaces in the high-altitude work member, This is a method for working at height, in which tension is applied to at least one of the first rope and the second rope by adjusting the length using the first length adjuster or the second length adjuster, thereby causing the body of the worker to be supported by the work member for working at height, and work is performed using a work positioning system.

[0009] Examples of the hoisting device for suspending a member for working at height include a crane hook and a cable such as a rope or chain attached to the crane hook.

[0010] Since the main body of the member for working at height with this configuration is a frame-shaped structure (frame main body), it can be inserted into narrow spaces that cannot be entered with conventional hanging cage-type boarding equipment, such as the fork of a tree branch, to carry out work. In particular, since the lower part of the frame main body is tapered, it is easy to lower the member for working at height into narrow spaces between branches, trunks, etc.

[0011] In the method for working at height using the member for working at height of this configuration, a worker wears the first rope and the second rope passed through both of the two adjacent closed spaces, and performs work using the work positioning system. The first rope and the second rope passed through both of the two adjacent closed spaces will not come off the member for working at height unless they are intentionally removed. Therefore, unlike conventional hanging cage-type boarding equipment, even if the member for working at height, which is the boarding equipment, tilts or falls over, the worker will not be thrown out of the member for working at height.

[0012] In addition, because work using the work positioning system is performed with tension applied to at least one of the first rope and the second rope, the worker can work with his or her body leaning outward from the member for working at height. This allows the worker to work over a wider range than in conventional work in which the worker stands up in a hanging cage.

[0013] In addition, while conventional hanging cage-type boarding equipment requires the worker to raise his / her arms higher than the handrail of the hanging cage to work, the high-altitude work method using the high-altitude work member of the present configuration allows a variety of postures to be taken as long as tension is applied to at least one of the first rope and the second rope. Therefore, it is possible to work with the arms extended at a height lower than the base of the arms, and the worker can work in a posture that makes it easier to exert force and with reduced physical strain. In addition, because the work can be done at a low position, the risk of the worker colliding with a cut branch or the like is reduced even if it swings.

[0014] Furthermore, because two ropes (the first rope and the second rope) whose lengths can be adjusted are used, even when the tension of one rope is loosened, the other rope is kept in tension, so the worker's posture can be kept stable. Furthermore, by applying tension to at least one of the two ropes fastened to the worker's torso or abdomen, the worker's body can be kept stably supported on the member for working at height, so the worker can use both hands for work and can easily work in a stable posture using both hands.

[0015] Furthermore, since the first rope and the second rope are both passed through adjacent closed spaces, they will not come off the member for high-altitude work unless the worker intentionally removes them. Therefore, even if one rope is removed from the member for high-altitude work in order to change the attachment position of the rope to the member for high-altitude work in order to take a position or posture that is easy for the worker to work in, the other rope still functions as a fall prevention rope. Therefore, the worker can be effectively prevented from falling and work at high altitudes can be performed safely.

[0016] The member for high altitude work according to the present invention has the above-mentioned configuration. Replace , " The frame body includes a vertical member, a horizontal member intersecting the vertical member, and an outer frame member to which at least one of the horizontal member and the vertical member is connected, and has a plurality of closed spaces formed therein. The lower portion of the frame body is tapered, A suspension support portion for supporting a suspension tool for suspending the frame body is formed at the center of the upper portion of the frame body, A rotation arm that is rotatably supported on the frame body; and an arm holder for holding the state in which a gap is formed between the rotated rotating arm and the frame body.

[0017] A suspended member for high-altitude work may sway or rotate, and in such a case, it is difficult to maintain a stable posture. Therefore, when working using a conventional hanging cage-type boarding equipment, it is difficult to work using both hands because of the need to prepare for unexpected swaying or rotation. In contrast, the member for high-altitude work of this configuration can be maintained by the arm holding part in a state in which a gap is generated between the rotating arm and the frame body by rotating the rotating arm. Therefore, by clamping a branch or the like in the gap between the rotating arm and the frame body, it is possible to prevent the member for high-altitude work from swaying or rotating, and it is possible to work using both hands in a stable posture.

[0018] In addition to the above configuration, the member for working at height according to the present invention has the following features: "The frame body is provided with a second suspension support part for supporting a backup suspension device in addition to the suspension support part, The second suspension support portion includes: Without intersecting the longitudinal members The outer frame material is connected second The cross member may be a hole formed through the cross member.

[0019] When a member for working at height climbs up onto an external object such as a branch, the load applied to the hoisting device such as a hook decreases, and there is a risk that the hoisting device will come off the hanging support part. In response to this, the frame body of the member for working at height having this configuration is provided with a second hanging support part in addition to the hanging support part. Therefore, in addition to the hoisting device supported by the hanging support part, a backup hoisting device can be supported by the second hanging support part. As a result, even if one hoisting device comes off the frame body, it can remain suspended by the other hoisting device, preventing the member for working at height from falling. Effect of the Invention

[0020] As described above, according to the present invention, it is possible to provide a component for working at height that is used by being suspended, making work at height safer and easier and enabling work to be done even in small spaces, and a method for working at height using the component for working at height. [Brief description of the drawings]

[0021] [Figure 1] 1 is a perspective view of a member for working at height according to one embodiment of the present invention; [Diagram 2] FIG. 2 is a front view of the member for working at height shown in FIG. 1. [Diagram 3] 2 is a diagram for explaining the relationship between a first rope and a second rope worn by a worker and the member for high-altitude work in FIG. 1, and high-altitude work using the member for high-altitude work in FIG. 1. FIG. [Figure 4] 3 is a diagram illustrating another aspect of high-altitude work using the high-altitude work member of FIG. 1. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] The following describes in detail, with reference to the drawings, a member for working at height 1 according to one embodiment of the present invention, and a method for working at height using the member for working at height 1. Since the member for working at height 1 is used while suspended, the terms "up and down" and "left and right" in the following description refer to the up and down and left and right of the member for working at height 1 in a suspended state.

[0023] First, we will explain the configuration of the member for working at height 1. The member for working at height 1 mainly comprises a frame body 10, a rotating arm 30, and an arm holder 35. The frame body 10 has vertical members 11, horizontal members 12 that intersect with the vertical members 11, and outer frame members 13a, 13b to which at least one of the horizontal members 12 and the vertical members 11 is connected, and multiple closed spaces are formed inside.

[0024] Specifically, the frame body 10 of this embodiment is a bilaterally symmetrical structure, and has four vertical members 11 extending in the up-down direction and five horizontal members 12 extending in the left-right direction. Of the vertical members 11, two vertical members 11b, excluding the two vertical members 11a at both the left and right ends, extend vertically longer than the vertical members 11a. Here, when it is not necessary to distinguish between the vertical members 11a and 11b, they are collectively referred to as the vertical members 11.

[0025] The horizontal members 12 include a horizontal member 12a that crosses the vertical members 11b by connecting the upper ends of the two vertical members 11b, a horizontal member 12b that crosses the vertical members 11b by connecting the lower ends of the two vertical members 11b, a horizontal member 12c that crosses the two vertical members 11b at right angles and crosses the vertical members 11a by connecting the upper ends of the two vertical members 11a, a horizontal member 12d that crosses the two vertical members 11b at right angles and crosses the vertical members 11a by connecting the lower ends of the two vertical members 11a, and a horizontal member 12e that crosses the two vertical members 11b at right angles and crosses the vertical members 11a by connecting the middle parts of the two vertical members 12a. Here, when it is not necessary to distinguish between the horizontal members 12a to 12e, they are collectively referred to as a horizontal member 12.

[0026] The frame body 10 of this embodiment includes, as outer frame materials, an outer frame material 13a surrounding the upper part of the frame body 10 and an outer frame material 13b surrounding the lower part of the frame body 10. The outer frame material 13a connects the vicinity of the intersection of each of the two vertical members 11a and the horizontal member 12c to both ends of the horizontal member 12a, and has an outer shape that protrudes upward. The outer frame material 13b connects the intersection of each of the two vertical members 11a and the horizontal member 12d, and the intersection of the horizontal member 12b and the vertical member 11b, and has an outer shape that protrudes downward. By including such outer frame materials 13a and 13b, the frame body 10 has an outer shape that tapers downward and also tapers upward. The size of the frame body 10 can be set to a vertical length of 140 cm to 180 cm and a horizontal length of 40 cm to 100 cm.

[0027] As described above, the frame body 10 has the vertical member 11, the horizontal member 12 intersecting the vertical member 11, and the outer frame members 13a and 13b to which at least one of the horizontal member 12 and the vertical member 11 is connected, and has a plurality of closed spaces formed therein. For example, the closed space S1 surrounded by the horizontal member 12a and the outer frame member 13a, the closed space S2 surrounded by the two vertical members 11b and the horizontal members 12a and 12c, the closed space S3 surrounded by two adjacent ones of the vertical members 11a and 11b and the horizontal members 12c and 12e, the closed space S4 surrounded by two adjacent ones of the vertical members 11a and 11b and the horizontal members 12e and 12d, and the closed space S5 surrounded by the two vertical members 11b and the horizontal members 12d and 12b can be mentioned (see FIG. 2).

[0028] In addition, since the upper outer frame material 13a of the frame main body 10 is a triangle protruding upward, the outer frame material 13a has a corner at the upper end, and this corner can support a hanging tool for suspending the frame main body 10. In other words, the corner at the upper end of the outer frame material 13a, which is a triangle protruding upward, constitutes the hanging support part 21.

[0029] Furthermore, the frame body 10 of this embodiment includes, in addition to the horizontal members 12a to 12e that intersect with the vertical members 11a and 11b as described above, a horizontal member 17 that connects the outer frame member 13a near the upper end of the frame body 10 without intersecting with the vertical members. A circular hole is formed through the horizontal member 17 as a second suspension support portion 22 for supporting a suspension tool 81 for backup. In this embodiment, two second suspension support portions 22 are formed symmetrically.

[0030] In addition, the frame body 10 of this embodiment is provided with a rod-shaped protruding member 14 protruding upward from the center of the cross member 12a, which is the highest of the cross members 12. The tip of the protruding member 14 is a free end. In other words, the protruding member 14 protrudes into the closed space S1 without further closing the closed space S1. The protruding height of the protruding member 14 can be 5 cm to 20 cm.

[0031] The rotating arms 30 are provided on the left and right sides of the frame body 10. The rotating arms 30 are elongated members having a U-shaped cross section in a direction perpendicular to the axial direction, and are rotatably supported by a support shaft 31 near the upper end of each arm on one of the left and right vertical members 11a. When the rotating arms 30 are not rotated, that is, when they are hanging down due to gravity, they overlap with the vertical member 11a with the vertical member 11a inserted inside the U-shape (see the rotating arm 30 on the right side of the paper in FIG. 2).

[0032] The arm holder 35 is a chain, one end of which is fixed to the end of the rotating arm 30 opposite to the end supported by the support shaft 31. Each of the left and right vertical members 11a of the frame body 10 is provided with a locking portion 15 for locking the arm holder 35 at a position higher than the support shaft 31. The locking portion 15 in this embodiment is a U-shaped member with both ends fixed to the vertical members 11a. With the rotating arm 30 rotated around the support shaft 31, a part of the chain serving as the arm holder 35 is fastened to the locking portion 15 so that the chain is taut, thereby maintaining the rotating arm 30 in a rotated state.

[0033] Here, a carabiner 37 is passed through a portion of the chain and fastened to the locking portion 15, thereby maintaining the rotating arm 30 rotated at a certain angle. Depending on the position at which the carabiner 37 is passed through the chain, the length of the chain up to the locking portion 15 can be changed, and the rotation angle of the rotating arm 30 can be changed. The state in which the rotating arm 30 is rotated at the maximum angle is when the upper end edge of the rotating arm 30 interferes with the outer surface of the vertical member 11a (see the rotating arm 30 on the left side of the paper in FIG. 2), and the rotating arm 30 can be rotated within a range up to that angle.

[0034] Although the arm holding part 35 is shown here as a chain as an example, the arm holding part 35 can also be a string-like member such as a rope, and its length can be adjusted by fixing one end to the end of the rotating arm 30 and tying the other end to the engaging part 15.

[0035] Although not shown in the drawings, the intersections of the various components (vertical members 11, horizontal members 12, outer frame members 13a, 13b, protruding members 14) in the component for working at height 1 are curved to avoid sharp corners. Also, the outer surface of each component is smooth with no protrusions that could catch the rope. This prevents damage to the rope when it is wound around the intersections of the components or when it is slid along the components, as described below.

[0036] Next, a method of working at height using the above-mentioned member for working at height 1 will be described. The worker wears a harness, and as shown in FIG. 3, uses a first rope 41 that is fastened to annular fasteners 51 located on both sides of a belt 50 that wraps around the torso to form a U-shape, and a second rope 42 that is fastened to fasteners 52 located on the abdomen of the belt 50 to form a ring shape. Here, the fasteners 52 are illustrated as being annular members, but a rope or belt called a bridge can also be used. The first rope 41 is provided with a first length adjuster 41b for adjusting the length, and the second rope 42 is provided with a second length adjuster 42b for adjusting the length in the same manner. The first length adjuster 41b and the second length adjuster 42b adjust the length of the rope by friction, and can be one that generates friction by tying the rope or one that generates friction by pinching the rope between metal fittings. Note that Figure 3 illustrates the relationship between the first rope 41 and second rope 42 worn by the worker and the high-altitude work component 1, and does not show the positional relationship between the worker and the high-altitude work component 1 when working at height.

[0037] The first rope 41 is passed through both adjacent closed spaces in the member for working at height 1, and both ends are fastened to the fasteners 51 on both sides of the worker. As a result, the folded-back portion of the first rope 41 is inside the closed spaces, so that the first rope 41 does not come off the member for working at height 1. For example, as shown in FIG. 3, when the first rope 41 is passed through both of the two adjacent closed spaces S3, the first rope 41 can slide along the vertical member 11b at the boundary between these two closed spaces S3, that is, between the intersection with the horizontal member 12c and the intersection with the horizontal member 12e. If the position of the fastener 51 on the belt 50 of the worker is positioned lower than the intersection P1 between the vertical member 11b and the horizontal member 12e, this intersection P1 becomes the anchor point of the first rope 41. In this way, by positioning the fastener 51 lower than the intersection P1, the first rope 41 can be prevented from sliding along the vertical member 11b between the intersection with the cross member 12c and the intersection with the cross member 12e, so that the worker's posture will not become unstable due to the sliding of the rope.

[0038] The second rope 42 can be fastened to the fastener 52 after passing through both the closed space S1 from which the protruding member 14 protrudes and the adjacent closed space S2 among the multiple closed spaces. As a result, like the first rope 41, the folded-back portion of the second rope 42 is also inside the closed space, so that the second rope 42 does not come off the member for working at height 1. At this time, the second rope 42 can be wound around the base of the protruding member 14. Since the protruding member 14 protrudes from the center of the cross member 12a located at the highest position as described above, the anchor point of the second rope 42 can be provided at the center of the upper part of the frame body 10 by winding the second rope 42 around the base of the protruding member 14.

[0039] In this embodiment, the second rope 42 is exemplified as a rope having a loop shape by fastening both ends to the fasteners 52. However, the second rope may be a rope having one end fastened to the fasteners 52 and an openable loop part at the other end. In this case, the second rope is passed through both adjacent closed spaces with the loop part at the tip open, and then the loop part is closed. Such a second rope is in the form of a single rope having one end fastened to the fasteners 52 and the other end attached to the member for high-altitude work 1. Even with such a second rope, the folded part of the loop part is inside the closed space, so the second rope will not come off the member for high-altitude work 1. Examples of a mode in which the loop part of the second rope can be opened and closed include a mode in which a metal fitting such as a carabiner that opens and closes in a ring shape is provided at the tip of a single rope, and both ends of a short rope are fastened to this metal fitting, and a mode in which a loop part is created by tying the tip of a single rope.

[0040] When performing high-altitude work using the member for high-altitude work 1 having the above-mentioned configuration, a suspending tool for suspending the member for high-altitude work 1 is attached to the suspending support part 21. For example, as illustrated in FIG. 3, a hook 62 fixed to the end of a rope 61 hanging down from the end of the arm of a crane is attached to the suspending support part 21 as a suspending tool. Then, the worker gets on the member for high-altitude work 1 with the first rope 41 and the second rope 42 attached to him passed through the adjacent closed spaces as described above. Then, with the worker's body supported by the member for high-altitude work 1, the member for high-altitude work 1 is moved to the place where the high-altitude work is to be performed by controlling the extension of the arm of the crane, the control of the angle of elevation, and the control of the extension of the rope suspending the hook.

[0041] While the worker is on the member for working at height 1, even when the crane is being moved or when working at height, the first length adjuster 41b or the second length adjuster 42b is used to adjust the length so that at least one of the first rope 41 and the second rope 42 is always in a tensioned state, thereby allowing the member for working at height 1 to support the worker's body. Even when the worker changes his / her body position or posture in accordance with the work, the length of the first rope 41 or the second rope 42 is always adjusted to maintain a tensioned state on at least one of the ropes, allowing the worker to take various postures with the body stably supported by the member for working at height 1. Furthermore, by maintaining a tensioned state on both the first rope 41 and the second rope 42, the worker can work with a more stable posture.

[0042] Since the high-altitude work performed using the member for high-altitude work 1 of this embodiment is performed using a work positioning system, the worker can work in a position in which he or she leans outward from the member for high-altitude work 1. Therefore, the work can be performed in a wider range than in conventional work in which the worker stands up in a hanging cage.

[0043] The member for working at height 1 not only supports the body of the worker via the first rope 41 and the second rope 42, but also serves as a foothold for the worker. For example, the member for working at height 1 can be used as a non-slip foothold by placing the soles of the worker's feet on the intersection between the horizontal member 12d and either of the vertical members 11a and 11b that form the closed spaces S4 and S5 located below in the member for working at height 1, and on the intersection between the vertical member 11b and the horizontal member 12b.

[0044] In addition, the protruding member 14 protruding inward in the closed space S1 through which the second rope 42 passes has a free end. Therefore, by removing the second rope 42 from the protruding member 14, the anchor point of the second rope 42 can be moved between the intersection of the right vertical member 11b and the horizontal member 12a, and the intersection of the left vertical member 11b and the horizontal member 12a.

[0045] Furthermore, there may be cases where the anchor point of the first rope 41 is to be changed so that the worker can take a posture that is easy for the worker to work in. In that case, the first rope 41 is replaced while the worker's body is stably supported by the member for working at height 1 by maintaining the tension on the second rope 42. The first rope 41 is once removed from the member for working at height 1, but the second rope 42 is passed through the closed space and does not come off the member for working at height 1. Therefore, the worker's fall can be effectively prevented by adjusting the length of the second rope to be as short as possible and applying tension to it. Similarly, when it is desired to change the state in which the second rope 42 is passed through the adjacent closed spaces S1 and S2 to a state in which it is passed through a different combination of closed spaces, the second rope 42 is replaced while the worker's body is stably supported by the member for working at height 1 by maintaining the tension on the first rope 41.

[0046] Here, since the member for working at height 1 is used in a suspended state, it may sway when exposed to the wind or when the worker shifts his / her weight, making it difficult to maintain a stable posture. In addition, the member for working at height 1 may suddenly rotate when it comes into contact with an external object. Furthermore, when a worker uses a chainsaw to cut down branches, the member for working at height 1 may be drawn to the branch or may move away depending on the direction of the blade. If one tries to work while constantly preparing for unexpected swaying or rotation, it is difficult to work using both hands.

[0047] To address such problems, the member for working at height 1 of this embodiment is provided with a rotating arm 30 that can rotate relative to the frame body 10 and maintain a state in which a gap is formed between the frame body 10. Therefore, the rotating arm 30 can be rotated around the support shaft 31, and an external object such as a branch can be pinched between the frame body 10 and the rotating arm 30 in a state in which the rotation angle of the rotating arm 30 is maintained by the arm holder 35. This makes it possible to prevent the member for working at height 1 from swinging or rotating unintentionally, so that the posture of the member for working at height 1 can be stabilized, and work can be performed using both hands in a stable environment.

[0048] In addition, if the member 1 for high-altitude work suspended from the hook 62 runs over an external object such as a branch and the load applied to the hook 62 is reduced, the suspension support part 21 in the frame body 10 may come off the hook 62, causing the member 1 for high-altitude work to fall. In response to this, the member 1 for high-altitude work in this embodiment is provided with a second suspension support part 22 for supporting a backup suspension tool 81 in addition to the suspension support part 21. Therefore, one end of a rope, chain, or the like as the backup suspension tool 81 can be attached to the second suspension support part 22. Generally, the hook 62 of a crane is connected to the rope 61 hanging from the tip of the arm of the crane via a rope socket, and the connection part is protected by the cylindrical hook block body 60.

[0049] Therefore, the other end of the backup hoisting device 81 is directly or indirectly attached to the hook block body 60. Here, a case is shown in which a backup fixing device 70 separate from the hook block body 60 is attached to the hook block body 60, and a hole 71 for attaching the hoisting device 81 is formed in the backup fixing device 70.

[0050] Both ends of the backup hoisting tool 81 are attached to the second suspending support part 22 of the member for high-altitude work 1 via a connector 87 such as a shackle or carabiner, and the other end is attached to the hole part 71 of the backup fixing tool 70. Here, the case where the connector 87 is a shackle is illustrated, and a retaining material 88 such as a snap pin or a split pin is inserted into the hole at the end of the bolt of the shackle. If the hook block main body 60 itself has a part to which one end of the suspending tool 81 can be attached, the backup fixing tool 70 is not necessary. In this way, by attaching one end of the backup hoisting tool 81 to the frame main body 10 while attaching the other end directly or indirectly to the hook block main body 60, even if the hook 62 comes off the suspending support part 21, the member for high-altitude work 1 is maintained in a state supported by the rope 61 of the crane, so that the member for high-altitude work 1 is prevented from falling.

[0051] In the above, the hook 62 of the crane is directly attached to the hanging support part 21 of the frame body 10. However, as shown in FIG. 4, an elastically expandable rope or other telescopic cable 82 can be attached to the hanging support part 21 as a suspending tool, and the member for high-altitude work 1 can be suspended by the hook 62 via the telescopic cable 82. In this case, when the member for high-altitude work 1 is suspended without interfering with anything, the telescopic cable 82 is in a stretched state. When the member for high-altitude work 1 runs over an external object such as a branch and the load applied to the hook 62 is reduced, the reduction in the load is absorbed by the contraction of the telescopic cable 82. Therefore, even if the load applied to the hook 62 is reduced, the telescopic cable 82 does not loosen, so that the telescopic cable 82 is effectively prevented from coming off the hook 62.

[0052] As described above, the member for working at height 1 of this embodiment has a flat frame-shaped structure (frame body 10) so that the member for working at height 1 can enter and work in narrow spaces such as the fork of a tree branch that cannot be entered with a conventional hanging cage-type boarding equipment. In particular, the lower part of the frame body 10 has a triangular shape protruding downward, so that the member for working at height 1 can be easily lowered into narrow spaces between branches, trunks, etc. In addition, the upper part of the frame body 10 also has a triangular shape protruding upward, so that the member for working at height 1 has the advantage of being easily moved while avoiding interference with branches, trunks, etc. when it is raised.

[0053] When trees are damaged by a storm or the like, trunks and branches may be about to break, or broken branches may be hanging on other branches to avoid falling. If the worker approaches the trunks and branches from below to cut down such trees, the worker is exposed to a dangerous environment in which the trunks and branches do not know when they will fall. In contrast, the member for working at height 1 of this embodiment can approach from above and descend into the space between the branches and trunks, so that the worker can remove the trunks and branches that are about to fall in advance or take measures to fix them to prevent them from falling, without worrying about the trunks and branches falling on the worker, and then proceed with the cutting work. The use of the member for working at height 1 increases the options for safe working at height, improves safety, and makes it possible to efficiently carry out high-altitude work, which was previously highly dangerous and therefore had low work efficiency.

[0054] Furthermore, the worker performs work while wearing a first rope 41 and a second rope 42 that are passed through both of two adjacent closed spaces among the multiple closed spaces provided in the member for working at height 1. Since the first rope 41 and the second rope 42 do not come off the member for working at height 1 unless intentionally removed, unlike conventional hanging cage-type boarding equipment, the worker will not be thrown from the member for working at height 1 even if the member for working at height 1, which is the boarding equipment, should tilt or fall over.

[0055] And, since the high-altitude work performed using the member for high-altitude work 1 is performed by the work positioning system with tension applied to at least one of the first rope 41 and the second rope 42 by adjusting the length of the rope, the worker can work by leaning his / her body out from the member for high-altitude work 1. Therefore, while the working range was limited to the range of the arms of a standing worker in the conventional hanging cage type boarding equipment, the method for high-altitude work of this embodiment allows the worker to work in a wide range up to the range of the arms of the worker leaning his / her body out from the member for high-altitude work 1. Also, the tension of the rope attached to the worker's body allows the worker to maintain a stable posture, so that both hands can be used freely to work.

[0056] In addition, while conventional hanging cage-type boarding equipment requires workers to raise their arms higher than the handrails of the hanging cage, high-altitude work using the member for high-altitude work 1 allows workers to take a variety of postures as long as tension is applied to at least one of the first rope 41 and the second rope 42, and thus allows workers to work with their arms extended at a height lower than the base of their arms. This allows workers to work in a posture that makes it easier to exert force, reducing physical strain. In addition, because work can be done at a low position, the risk of workers colliding with cut branches or the like that may swing out is reduced.

[0057] Furthermore, the rotating arm 30 and the frame body 10 can be held in a state where a gap is created between them, and branches and the like can be sandwiched between them, preventing the high-altitude work member 1 from shaking or rotating and allowing work to be performed in a stable posture.

[0058] In addition, since it has a second hanging support part 22 that supports the backup hanging device 81, one end of the hanging device 81 is attached thereto, and the other end is indirectly or directly attached to the hook block body 60, so that even if the hanging support part 21 comes off the hanging device such as the hook 62, the risk of the high-altitude work member 1 falling is prevented.

[0059] The present invention has been described above with reference to preferred embodiments, but the present invention is not limited to the above embodiments, and various improvements and design changes are possible without departing from the spirit of the present invention, as described below.

[0060] For example, the positions and numbers of the vertical members 11 and horizontal members 12 shown in the above embodiment are merely examples, and are not particularly limited as long as a plurality of closed spaces are formed.

[0061] In the above, a case has been described in which a worker uses the high-altitude work member 1 as a foothold and supports his / her body on the high-altitude work member 1 to perform high-altitude work. However, it is also possible for the worker to go outside the high-altitude work member 1 and climb onto a tree or other object to be worked on while adjusting the lengths of the first rope 41 and the second rope 42 so that tension is applied to both ropes, and then perform work.

[0062] Specifically, in the past, when pruning trees, a worker climbed a tree to perform work, and a rope or the like for supporting the body was fastened to the tree branch or trunk. Therefore, if the branch selected as the anchor point was withered or rotten and had low strength, there was a risk that the branch would break and the worker would fall. In contrast, when the work is performed using the member for high-altitude work 1 of this embodiment, even if the worker moves onto the tree, the anchor points of the first rope 41 and the second rope 42 are always inside the member for high-altitude work 1, so even if the branch on which the worker moved onto breaks, the first rope 41 and the second rope 42 can prevent the worker from falling. Furthermore, as a mode in which the worker moves onto the tree to perform work, a mode in which the first rope 41 is replaced and its anchor point is set to a branch or trunk of the tree can be conceived. Even in this case, the anchor point of the second rope 42 is inside the member for high-altitude work 1, so even if the branch on which the worker moved onto breaks, the second rope 42 can prevent the worker from falling.

[0063] In addition, when working with a conventional cage-type boarding equipment, if the extension and contraction of the crane's arm and the length of the rope suspending the hook are controlled by a remote control carried by the worker, if the remote control is dropped or the crane's engine stops for some reason, these controls become impossible and the worker may be unable to descend from the boarding equipment. Although the worker working in the cage is equipped with a rope to prevent falling, this rope is a fall arrest system rope and therefore cannot be used to descend to the ground.

[0064] In contrast, the first rope 41 and the second rope 42 worn by the worker using the member for working at height 1 are ropes for a work positioning system, and are equipped with a first length adjuster 41b and a second length adjuster 42b, respectively. Therefore, even if the worker falls into a situation where he or she cannot control the operation of the crane, such as dropping the remote control, he or she can safely descend from the member for working at height 1 to the ground by alternately repeating the task of maintaining the length of one of the first rope 41 and the second rope 42 to maintain the position of the body while lengthening the other rope.

[0065] The member 1 for high-altitude work of this embodiment can be used for high-altitude work such as tree pruning, but can also be used for rescue work at high altitudes. If a person is rescued using a conventional hanging cage-type boarding equipment, it is extremely difficult for a single worker inside the hanging cage to pull the body of the rescuee into the hanging cage. In contrast, since the member 1 for high-altitude work of this embodiment has a frame-shaped structure as its main body, it is easy to transfer the body of the rescuee onto the member 1 for high-altitude work. Therefore, a worker whose body is supported by the member 1 for high-altitude work can easily lower the member 1 for high-altitude work to the ground by lowering the member 1 for high-altitude work while firmly holding the body of the rescuee who has been transferred onto the member 1 for high-altitude work.

[0066] In addition, the member 1 for working at height in this embodiment is a frame-like structure with many intersections between the members. Therefore, work tools and rescue equipment can be hung from these intersections. This allows the worker to be lighter than if he or she were to carry the work tools and rescue equipment with him or her, and reduces the physical burden on the worker.

[0067] Although the above describes work using a work positioning system, the worker's body can be supported or suspended by the first rope while being moved by adjusting the length of the second rope, so work at height using the work at height component 1 can also be done using a rope access system. [Explanation of symbols]

[0068] 1. Materials for working at height 10 Frame body 11,11a,11b Vertical members 12,12a,12b,12c,12d,12e Cross member 13a, 13b Outer frame material 14 Protruding member 21 Hanging support 22 Second hanging support part 30 Rotating Arm 35 Arm holder 41 First Rope 41b First length adjuster 42 Second Rope 42b Second length adjuster S1,S2,S3,S4,S5 Closed space

Claims

1. The frame body includes a vertical member, a horizontal member intersecting the vertical member, and an outer frame member to which at least one of the horizontal member and the vertical member is connected, and has a plurality of closed spaces formed therein. The lower portion of the frame body is tapered, A suspension support portion for supporting a suspension tool for suspending the frame body is formed at the center of the upper portion of the frame body, The frame body includes a protruding member protruding from the cross member without closing the closed space, The protruding member protrudes upward when the frame body is suspended, The base of the protruding member is a portion that serves as an anchor point by winding a rope that is passed through both the closed space from which the protruding member protrudes and the closed space adjacent to the closed space. A member for working at height.

2. The frame body includes a vertical member, a horizontal member intersecting the vertical member, and an outer frame member to which at least one of the horizontal member and the vertical member is connected, and has a plurality of closed spaces formed therein. The lower portion of the frame body is tapered, A suspension support portion for supporting a suspension tool for suspending the frame body is formed at the center of the upper portion of the frame body, A rotation arm that is rotatably supported on the frame body; and an arm holder for holding the pivoted pivot arm in a state in which a gap is formed between the pivot arm and the frame body. A member for working at height.

3. The frame body includes a second suspension support portion for supporting a backup suspension device in addition to the suspension support portion, The second suspension support portion is a hole portion provided through a second horizontal member that connects the outer frame members without intersecting with the vertical members.

3. A member for working at height according to claim 1 or 2.

4. A method for working at height using the member for working at height according to claim 1 or 2, a first rope and a second rope, The first rope is U-shaped with both ends fastened to both sides of the worker's torso and is equipped with a first length adjuster, The second rope is a rope that is looped by fastening both ends to the abdomen of the worker, or a rope that is fastened to the abdomen of the worker at one end and has a loop-shaped portion at the other end that can be opened and closed, and is equipped with a second length adjuster; The first rope is passed through both of the two adjacent closed spaces in the member for working at height, The second rope is passed through both of two adjacent closed spaces in a combination different from the closed space through which the first rope is passed, among the multiple closed spaces in the high-altitude work member, By adjusting the length using the first length adjuster or the second length adjuster, tension is applied to at least one of the first rope and the second rope, so that the body of the worker is supported by the member for working at height, and work is performed using a work positioning system. A method for working at height, comprising:

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