JP2021188461A - Member for aerial work and aerial work method - Google Patents

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

The present invention relates to an aerial work platform member that is suspended and used, and an aerial work platform method that is performed using the aerial work platform member.

For aerial work such as pruning trees, a hanging basket (sometimes called a "gondola") is hung from the hook of a crane, and workers board the inside of the gondola to work at aerial work. May be done. According to the Crane Safety Regulations, in principle, it is not possible to carry or suspend workers with a mobile crane, but according to Article 73 of the same regulations, only in specific cases, the hook of the crane can be used. It is stipulated that a dedicated boarding facility can be hung and a worker can be placed on this boarding facility to work.

However, when working by boarding inside the hanging car, if the hanging car tilts or falls due to interference with external objects such as tree branches, the worker may be thrown out of the hanging car. there were.

In addition, since the hanging basket is bulky, it is difficult to enter the narrow space, and it is not possible to perform the desired work in the narrow space, or extra branches are cut down to create a space for the hanging basket to enter. In some cases, additional work was required.

Further, the workable range is limited to the reach of the arm of the worker standing inside the hanging basket. Therefore, in order to perform the work in a wide range, it is necessary to move the hanging car frequently, and there is a problem that the work of moving the entire hanging car is complicated. In addition, when working upright in a hanging car, the arm is extended higher than the handrail of the hanging car. Raising the arm higher than the base of the arm puts a heavy physical burden on the worker and causes severe fatigue, and when using a heavy object such as a chainsaw, it is difficult to apply force and work. In addition, the Ministry of Health, Labor and Welfare's "Guidelines for Safety of Logging with Chainsaws" states that the chainsaw should not be raised above the shoulder as a basic attitude for handling chainsaws. If you extend your arm beyond it, the chainsaw tends to be higher than your shoulder, which is dangerous. In addition, if the work of cutting the branches is performed at a high position, the separated branches may swing and collide with the operator.

Therefore, in view of the above circumstances, the present invention is a member for aerial work that is hung and used, and the aerial work can be performed more safely and easily, and the work can be performed even in a narrow space. An object of the present invention is to provide a member for aerial work and a method for working at a higher place using the member for aerial work.

In order to solve the above problems, the aerial work platform according to the present invention is
"It has 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 a plurality of closed spaces are formed inside. Equipped with a frame body,
The lower part of the frame body is tapered and
A hanging support portion for supporting a hanging tool for suspending the frame body is formed in the center of the upper part of the frame body. "

Since the aerial work platform has this configuration, it is possible to work by the following aerial work platform after attaching a hanger for suspending the aerial work platform to the hanging support. It will be possible. That is,
"It is an aerial work method using the above-mentioned aerial work member and the first rope and the second rope.
The first rope has a U-shape 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 having both ends fastened to the worker's abdomen to form a ring shape, or a rope having one end fastened to the worker's abdomen and having a ring-shaped portion that can be opened and closed at the other end. It also has a second length adjuster,
While passing the first rope through both of the two adjacent closed spaces in the aerial work platform,
The second rope is passed through both of the two adjacent closed spaces in a combination different from the closed space through which the first rope is passed among the plurality of closed spaces in the aerial work platform.
By adjusting the length by 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 worker can apply tension to the aerial work platform member. It is an aerial work platform that supports the body and works with a work positioning system.

Examples of the hanging tool for suspending the aerial work member include a crane hook and a rope such as a rope or a chain attached to the crane hook.

Since the main body of the aerial work platform member of this configuration is a frame-shaped structure (frame main body), it is a narrow space that cannot be entered by conventional hanging basket type boarding equipment such as the fork of a tree branch. However, the work can be performed by inserting the member for work at a high place. In particular, since the lower part of the frame body is tapered, it is easy to drop the aerial work platform member into a narrow space between branches and trunks.

Then, in the aerial work method using the aerial work member of this configuration, the worker attaches the first rope and the second rope that have passed through both of the two adjacent closed spaces, and the work is performed by the work positioning system. conduct. The first rope and the second rope passed through both of the two adjacent closed spaces will not come off from the aerial work platform unless they are intentionally removed. Therefore, unlike the conventional hanging cage type boarding equipment, even if the aerial work platform member, which is the boarding equipment, tilts or falls, the worker is not thrown out from the aerial work platform member.

In addition, since the work by the work positioning system is performed with tension applied to at least one of the first rope and the second rope, the worker's body is leaned out from the aerial work platform. It can be done in a posture. Therefore, the work can be performed in a wide range as compared with the conventional work in which the worker stands upright in the hanging basket.

In addition, in the conventional hanging car type boarding equipment, it was necessary to raise the arm higher than the handrail of the hanging car, but in the high-altitude work method using the high-altitude work member of this configuration. , A variety of postures can be taken if tension is applied to at least one of the first rope and the second rope. Therefore, it is possible to work with the arm extended to a height lower than the base of the arm, and it is possible to reduce the physical burden in a posture in which force is easily applied and to perform the work. Further, since the work can be performed at a low position, the risk of collision with the operator is reduced even if the cut branch or the like swings.

And since two ropes (first rope and second rope) whose lengths can be adjusted are used, even if the tension of one rope is relaxed, the tension is applied to the other rope. By maintaining the rope, the posture of the worker can be kept stable. Then, by applying tension to at least one of the two ropes fastened to the torso and abdomen of the worker, the body can be stably held by the aerial work platform, so that the work can be performed. A person can use both hands for work, and can easily perform work in a stable posture using both hands.

Further, since both the first rope and the second rope are passed through the adjacent closed space, they cannot be removed from the aerial work platform unless the operator intentionally removes them. Therefore, even if the rope is once removed from the aerial work platform in order to change the attachment position of one of the ropes to the aerial work platform in order to take a position and posture that is easy for the operator to work on. The other rope functions as a fall prevention rope. Therefore, it is possible to effectively prevent the worker from falling and to safely perform the work at a high place.

In addition to the above configuration, the aerial work platform according to the present invention is provided.
"A rotating arm that is rotatably supported with respect to the frame body and
It can be provided with an arm holder that holds a state in which a gap is formed between the rotated rotating arm and the frame body. "

The suspended aerial work platform may sway or rotate, in which case it is difficult to take a stable posture. Therefore, when working using the conventional hanging basket type boarding equipment, it is difficult to work using both hands because it is necessary to prepare for unexpected shaking and rotation. On the other hand, in the aerial work platform member having this configuration, the arm holding portion can hold a state in which a gap is generated between the rotating arm and the frame body by rotating the rotating arm. Therefore, by sandwiching a branch or the like in the gap between the rotating arm and the frame body, it is possible to prevent the aerial work platform members from shaking or rotating, so work with both hands in a stable posture. It can be carried out.

In addition to the above configuration, the aerial work platform according to the present invention is provided.
"The frame main body may be provided with a second hanging support portion for supporting a hanging tool for backup, in addition to the hanging support portion."

When the aerial work platform rides on an external object such as a branch, the load applied to the hanging tool such as a hook is reduced, and the hanging tool may come off from the hanging support portion. On the other hand, the frame main body of the aerial work platform of this configuration is provided with a second suspension support portion in addition to the suspension support portion. Therefore, the hanging tool for backup can be supported by the second hanging support portion separately from the hanging tool supported by the hanging support portion. As a result, even if one of the hanging tools comes off from the frame body, the state of being suspended by the other hanging tool can be maintained, and the possibility that the aerial work platform member may fall can be prevented. can.

As described above, according to the present invention, it is a member for aerial work that is used by suspending it, and it is possible to perform aerial work more safely and easily, and it is also possible to work in a narrow space. It is possible to provide an aerial work platform member and an aerial work platform method using the aerial work platform member.

It is a perspective view of the member for aerial work which is one Embodiment of this invention. It is a front view of the aerial work platform of FIG. It is a figure explaining the relationship between the 1st rope and the 2nd rope worn by the worker, the aerial work platform member of FIG. 1, and the aerial work platform using the aerial work platform of FIG. It is a figure explaining another aspect of aerial work using the aerial work member of FIG. 1.

Hereinafter, the aerial work platform 1 according to the embodiment of the present invention and the aerial work platform method using the aerial work platform 1 will be specifically described with reference to the drawings. Since the aerial work platform 1 is used by being suspended, the "upper and lower" and "left and right" in the following are the upper and lower and left and right of the aerial work platform 1 in the suspended state.

First, the configuration of the aerial work platform 1 will be described. The aerial work platform 1 mainly includes a frame main body 10, a rotating arm 30, and an arm holder 35. The frame main body 10 has a vertical member 11, a horizontal member 12 intersecting the vertical member 11, and outer frame members 13a and 13b to which at least one of the horizontal member 12 and the vertical member 11 is connected. Multiple closed spaces are formed inside.

Specifically, the frame main body 10 of the present embodiment is a symmetrical structure, and has four vertical members 11 extending in the vertical direction and five horizontal members 12 extending in the horizontal direction. Of the vertical members 11, the two vertical members 11b except for the two vertical members 11a at both 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.

The horizontal member 12 intersects the vertical member 11b by connecting the upper ends of the two vertical members 11b to the horizontal member 12a that intersects the vertical member 11b and by connecting the lower ends of the two vertical members 11b. A horizontal member 12c that is orthogonal to the two vertical members 11b and intersects the vertical member 11a by connecting the upper ends of the two vertical members 11a, and two vertical members. A horizontal member 12d that is orthogonal to 11b and intersects the vertical member 11a by connecting the lower ends of the two vertical members 11a, and a horizontal member 12d that is orthogonal to the two vertical members 11b and that is orthogonal to the two vertical members 12a. There is a cross member 12e that intersects the vertical member 11a by connecting the middle members. Here, when it is not necessary to distinguish the cross members 12a to 12e, they are collectively referred to as the cross members 12.

The frame body 10 of the present embodiment includes 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 as the outer frame material. The outer frame member 13a connects the vicinity of the intersection between each of the two vertical members 11a and the horizontal member 12c and both ends of the horizontal member 12a, and has a triangular shape whose outer shape protrudes upward. The outer frame member 13b connects each of the two vertical members 11a and the intersection of the horizontal members 12d and the intersections of the horizontal members 12b and the vertical members 11b, and is a triangle whose outer shape protrudes downward. Is presented. By providing such outer frame materials 13a and 13b, the frame main body 10 has an outer shape that tapers downward and also has an outer shape that tapers upward. The size of the frame body 10 can be set to a length of 140 cm to 180 cm in the vertical direction and a length of 40 cm to 100 cm in the horizontal direction.

As described above, in the frame main body 10 having 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. , Multiple closed spaces are formed inside. 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, 12c, and the vertical members 11a, 11b are adjacent to each other. Closed space S3 surrounded by the two horizontal members 12c and 12e, and two vertical closed spaces S4 surrounded by the adjacent two vertical members 11a and 11b and the horizontal members 12e and 12d. A closed space S5 surrounded by the members 11b and the cross members 12d and 12b can be mentioned (see FIG. 2).

Further, the frame main body 10 has a corner portion at the upper end of the outer frame material 13a because the upper outer frame material 13a is a triangle protruding upward, and the frame main body 10 is suspended from this corner portion. It is possible to support the hanging tool. That is, the corner portion of the upper end of the outer frame member 13a, which is a triangular shape protruding upward, constitutes the hanging support portion 21.

Further, the frame main body 10 of the present embodiment has an outer frame in the vicinity of the upper end of the frame main body 10 without intersecting the vertical members, in addition to the horizontal members 12a to 12e intersecting the vertical members 11a and 11b as described above. A cross member 17 connecting the members 13a is provided. The cross member 17 is provided with a circular hole as a second suspension support portion 22 for supporting the suspension tool 81 for backup. In the present embodiment, the two second suspension support portions 22 are formed symmetrically.

In addition, the frame main body 10 of the present embodiment includes a rod-shaped projecting member 14 projecting upward from the center of the cross member 12a at the highest position of the cross member 12. The tip of the projecting member 14 is a free end. That is, the projecting member 14 projects 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.

One rotating arm 30 is provided on each of the left and right sides of the frame body 10. The rotating arm 30 is an elongated member having a U-shaped cross section in a direction orthogonal to the axial direction, and is rotatably supported by a support shaft 31 near the upper end of each of the left and right vertical members 11a. .. The rotating arm 30 overlaps with the vertical member 11a with the vertical member 11a inserted inside the U-shape in a non-rotating state, that is, in a state of hanging due to gravity (on the right side of the paper in FIG. 2). See rotating arm 30).

The arm holder 35 is a chain, and one end thereof is fixed to an end portion of the rotating arm 30 opposite to the end portion pivotally supported by the support shaft 31. Further, each of the left and right vertical members 11a of the frame main 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 of the present embodiment is a U-shaped member having both ends fixed to the vertical member 11a. With the rotating arm 30 rotated around the support shaft 31, the rotating arm 30 is formed by fastening a part of the chain to the locking portion 15 so that the chain, which is the arm holder 35, is taut. The rotating state can be maintained.

Here, a case is illustrated in which the carabiner 37 passed through a part of the chain is fastened to the locking portion 15 to maintain the state in which the rotating arm 30 is rotated by a certain angle. Depending on the position where 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 rotation arm 30 can be changed. The state in which the upper end side of the rotating arm 30 interferes with the outer surface of the vertical member 11a is the state in which the rotating arm 30 is rotated at the maximum angle (see the rotating arm 30 on the left side of the paper in FIG. 2). ), The rotation arm 30 can be rotated within the range up to that angle.

Although the case where the arm holding portion 35 is a chain is illustrated here, the arm holding portion 35 can be a string-shaped member such as a rope, and one end thereof is fixed to the end portion of the rotating arm 30. At the same time, the length can be adjusted by binding the other end to the locking portion 15.

Although not shown in the drawings, the intersections where the members (vertical members 11, cross members 12, outer frame members 13a, 13b, projecting members 14) intersect in the aerial work platform 1 are sharp corners. It is formed on a curved surface so as not to become. Further, the outer surface of each member is formed on a smooth surface without protrusions on which the rope is caught. As a result, as will be described later, damage to the rope when the rope is wound around the intersection of each member or when the rope is slid along each member is suppressed.

Next, an aerial work method performed by using the aerial work member 1 having the above configuration will be described. The operator is wearing a harness, and as shown in FIG. 3, the first rope 41 which is fastened to the annular fasteners 51 located on both sides of the belt 50 for winding the body to form a U shape. A second rope 42 is used, which is fastened at both ends to a fastener 52 on the abdomen of the belt 50 to form a ring shape. Here, the case where the fastener 52 is an annular member is shown, but a rope or a 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 also provided with a second length adjuster 42b for adjusting the length. The first length adjuster 41b and the second length adjuster 42b adjust the length of the rope by friction, and cause friction depending on how the rope is tied, or the rope is tied with metal fittings. Those that cause friction by sandwiching can be used. Note that FIG. 3 illustrates the relationship between the first rope 41 and the second rope 42 worn by the worker and the aerial work platform member 1, and the worker and the worker in the state of performing the aerial work. It does not indicate the positional relationship of the aerial work platform 1.

The first rope 41 passes through both of the adjacent closed spaces in the aerial work platform 1, and both ends thereof are fastened to the fasteners 51 on both sides of the worker. As a result, since the folded portion of the first rope 41 is inside the closed space, the first rope 41 does not come off from the aerial work member 1. For example, as shown in FIG. 3, when the first rope 41 is passed through both of two adjacent closed spaces S3, the boundary between these two closed spaces S3, that is, the intersection with the cross member 12c and the cross member 12e The first rope 41 is slidable along the vertical member 11b between the rope and the intersection. If the position of the fastener 51 on the worker's belt 50 is lower than the intersection P1 between the vertical member 11b and the cross member 12e, this intersection P1 becomes the anchor point of the first rope 41. By positioning the fastener 51 lower than the intersection P1 in this way, the first rope 41 is placed along the vertical member 11b between the intersection with the cross member 12c and the intersection with the cross member 12e. Since it can be prevented from sliding, the posture of the operator is not unstable due to the sliding of the rope.

The second rope 42 can be fastened to the fastener 52 after passing through both the closed space S1 in which the projecting member 14 projects and the closed space S2 adjacent thereto among the plurality of closed spaces. As a result, similarly to the first rope 41, the folded portion of the second rope 42 is also inside the closed space, so that the second rope 42 does not come off from the aerial work member 1. At this time, the second rope 42 can be wound around the base of the projecting member 14. As described above, the projecting member 14 projects from the center of the cross member 12a at the highest position. Therefore, by winding the second rope 42 around the base of the projecting member 14, the projecting member 14 is centered on the upper part of the frame body 10. An anchor point for the second rope 42 can be provided.

Here, as the second rope 42, a rope having a ring shape by being fastened to the fastener 52 at both ends thereof is illustrated, but as the second rope, one end is fastened to the fastener 52 and also. , A rope having a ring-shaped portion that can be opened and closed at the other end can be used. In this case, the ring-shaped portion is closed after the second rope is passed through both of the adjacent closed spaces with the ring-shaped portion at the tip open. One end of such a second rope is fastened to the fastener 52, and the other end is in the form of a single rope attached to the aerial work platform 1. Even with such a second rope, since the folded portion of the ring-shaped portion is inside the closed space, the second rope does not come off from the aerial work platform 1. As a mode in which the ring-shaped part of the second rope can be opened and closed, a metal fitting such as a carabiner is provided at the tip of one rope, and both ends of the short rope are fastened to this metal fitting. An embodiment in which a ring-shaped portion is formed by tying the tips of the ropes of the rope can be mentioned.

When performing aerial work using the aerial work platform 1 having the above configuration, a hanger for suspending the aerial work platform 1 is attached to the suspension support portion 21. For example, as illustrated in FIG. 3, a hook 62 fixed to the tip of a rope 61 hanging from the tip of the arm of the crane is attached to the hanging support 21 as a hanging tool. Then, the worker gets on the aerial work platform 1 with the mounted first rope 41 and the second rope 42 passed through the adjacent closed space as described above. Then, with the worker's body supported by the aerial work platform 1, the height is controlled by controlling the extension of the arm of the crane, controlling the undulation angle, and controlling the extension of the rope that suspends the hook. The aerial work platform member 1 is moved to the place where the work is performed.

While the worker is on the aerial work platform 1, the first length adjuster 41b or the second is always used, whether the crane is moved or the aerial work is being performed. By adjusting the length by the length adjuster 42b, tension is applied to at least one of the first rope 41 and the second rope 42, so that the aerial work platform member 1 supports the worker's body. Even when the position or posture of the body is changed due to work, the length of the first rope 41 or the second rope 42 is always adjusted to maintain the tension applied to at least one of the ropes, so that the height is high. It is possible to take various postures while the body is stably supported by the work member 1. Then, if the state in which tension is applied to both the first rope 41 and the second rope 42 is maintained, the posture of the worker can be made more stable and the work can be performed.

Since the aerial work performed by using the aerial work member 1 of the present embodiment is the work by the work positioning system, the worker's body is leaned out from the aerial work member 1 in a posture of leaning out. , Can work. Therefore, it is possible to perform the work in a wide range as compared with the conventional work in which the worker is standing upright in the hanging basket.

The aerial work platform 1 supports the worker's body via the first rope 41 and the second rope 42, and also serves as a scaffold for the worker. For example, the intersection of any of the vertical members 11a and 11b forming the closed spaces S4 and S5 located below in the aerial work platform 1 with the horizontal member 12d, and the vertical member 11b and the horizontal member 12b. By hanging the sole of the worker's foot on the intersection, it can be used as a non-slip scaffold.

Further, the projecting member 14 projecting inward in the closed space S1 passing through the second rope 42 has a free end. Therefore, if the second rope 42 is removed from the projecting member 14, the intersection of the right vertical member 11b and the horizontal member 12a of the two vertical members 11b and the intersection of the left vertical member 11b and the horizontal member 12a The anchor point of the second rope 42 can be moved between the portions.

Further, there may be a case where it is desired to change the anchor point of the first rope 41 in order to take a posture that makes it easy for the operator to perform the work. In that case, by maintaining the state in which tension is applied to the second rope 42, the first rope 41 is replaced in a state where the worker's body is stably supported by the aerial work member 1. The first rope 41 is once removed from the aerial work platform 1, but the second rope 42 is passed through a closed space and cannot be removed from the aerial work platform 1. Therefore, by adjusting the length of the second rope to be as short as possible and applying tension, it is possible to effectively prevent the operator from falling. 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 the state in which the second rope is passed through another combination of closed spaces, a state in which tension is applied to the first rope 41. By maintaining the above, the second rope 42 is replaced in a state where the worker's body is stably supported by the aerial work member 1.

Here, since the aerial work platform 1 is used in a suspended state, it may shake when it receives wind or when the worker shifts his / her weight, and the posture is difficult to stabilize. In addition, the aerial work platform 1 may unexpectedly rotate when it comes into contact with an external object. Further, when a worker cuts a branch using a chainsaw, the worker may be attracted to the branch together with the aerial work platform 1 depending on the direction of the blade, or may move away from the branch. It is difficult to work with both hands when trying to work while always preparing for unexpected shaking and rotation.

In response to such a problem, the aerial work platform 1 of the present embodiment rotates with respect to the frame main body 10 and can maintain a state in which a gap is formed between the frame main body 10 and the frame main body 10. It is equipped with an arm 30. Therefore, in a state where the rotating arm 30 is rotated around the support shaft 31 and the rotation angle of the rotating arm 30 is held by the arm holder 35, an external branch or the like is formed between the frame body 10 and the rotating arm 30. You can pinch the object of. As a result, it is possible to prevent the aerial work platform 1 from unintentionally swinging or rotating, so that the posture of the aerial work platform 1 can be stabilized, and both hands can be used in a stable environment. You can work on it.

Further, when the aerial work platform member 1 suspended from the hook 62 rides on an external object such as a branch and the load applied to the hook 62 decreases, the suspension support portion 21 in the frame body 10 comes off from the hook 62. , There is a risk that the aerial work platform 1 will crash. On the other hand, the aerial work platform 1 of the present embodiment is provided with a second suspension support portion 22 for supporting the suspension tool 81 for backup, in addition to the suspension support portion 21. Therefore, one end of a rope, a chain, or the like as a hanging tool 81 for backup can be attached to the second hanging support portion 22. Generally, the hook 62 of the crane is connected to the rope 61 hanging from the tip of the arm of the crane via a rope socket, and the connecting portion is protected by the tubular hook block main body 60. ..

Therefore, the other end of the hanger 81 for backup is directly or indirectly attached to the hook block main body 60. Here, the case where the backup fixing tool 70 separate from the hook block main body 60 is attached to the hook block main body 60, and the hole portion 71 for attaching the hanging tool 81 is formed in the backup fixing tool 70 is shown. Shows.

Both ends of the hanger 81 for backup are attached to the second hanging support portion 22 of the aerial work platform 1 via a connecting tool 87 such as a shackle or a carabiner, respectively, and the other is a backup fixing tool 70. It is attached to the hole 71 of. 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 portion to which one end of the hanging tool 81 can be attached, the backup fixing tool 70 is unnecessary. In this way, by attaching one of both ends of the hanging tool 81 for backup to the frame main body 10 and directly or indirectly attaching the other to the hook block main body 60, the hook can be hooked from the hanging support portion 21. Even when the 62 is removed, the aerial work platform member 1 is maintained in a state of being supported by the rope 61 of the crane, so that the aerial work platform member 1 is prevented from falling.

In the above, the case where the hook 62 of the crane is directly attached to the hanging support portion 21 of the frame main body 10 is illustrated, but as shown in FIG. 4, a stretchable rope 82 such as a rope that elastically expands and contracts is suspended. It is attached to the hanging support portion 21 as a tool, and the aerial work member 1 can be hung by the hook 62 via the telescopic rope 82. In this case, the telescopic cord 82 is in an extended state when the aerial work platform 1 is suspended without interfering with something. When the load applied to the hook 62 is reduced by the aerial work platform 1 riding on an external object such as a branch, the reduction in the load is absorbed by the contraction of the telescopic cord 82. Therefore, even if the load applied to the hook 62 is reduced, the telescopic cord 82 does not loosen, so that the telescopic cord 82 is effectively prevented from coming off the hook 62.

As described above, since the main body of the aerial work platform 1 of the present embodiment is a flat frame-shaped structure (frame main body 10), a conventional hanging basket type boarding such as a branch of a tree is carried out. Even in a narrow space that cannot be entered by equipment, the work member 1 for aerial work can be entered to perform the work. In particular, since the lower portion of the frame body 10 has a triangular shape protruding downward, it is easy to lower the aerial work platform 1 into a narrow space between branches, trunks, and the like. Further, since the upper part of the frame main body 10 also has a triangular shape protruding upward, there is an advantage that even when the aerial work platform 1 is raised, it is easy to move while avoiding interference with branches, trunks, and the like.

When a tree is damaged by a storm, the trunk or branch may be about to break, or the broken branch may be hung on another branch to avoid falling. When approaching from below the trunks and branches for such tree logging, workers are exposed to the dangerous environment of not knowing when the trunks and branches will fall. On the other hand, according to the aerial work platform 1 of the present embodiment, the trunk or branch falls on the worker because it can be approached from above and lowered into the space between the branches or trunk. You can remove trunks and branches that are likely to fall or take fixing measures to prevent them from falling before proceeding with logging without worrying about them coming. The use of the aerial work platform 1 increases the options for safe aerial work methods, improves safety, and efficiently performs aerial work, which was previously low in work efficiency due to its high risk. You can proceed.

Further, the worker performs the work in a state where the first rope 41 and the second rope 42 passed through both of the two adjacent closed spaces among the plurality of closed spaces provided in the aerial work platform 1 are attached. Since the first rope 41 and the second rope 42 cannot be removed from the aerial work platform 1 unless they are intentionally removed, the aerial work platform 1 is different from the conventional hanging cage type boarding equipment. Even if the rope is tilted or falls, the worker will not be thrown out of the aerial work platform 1.

The aerial work performed by using the aerial work member 1 is a work performed by the work positioning system in a state where tension is applied to at least one of them by adjusting the lengths of the first rope 41 and the second rope 42. Therefore, the work can be performed so that the worker leans out from the aerial work platform 1. Therefore, in the conventional hanging basket type boarding equipment, the work range is limited within the reach of the arm of the standing worker, but in the aerial work method of the present embodiment, from the aerial work member 1 You can work in a wide range, up to the reach of your arms while leaning out. In addition, since the tension of the rope attached to the worker's body can maintain a stable posture, the work can be performed by freely using both hands.

In addition, in the conventional hanging basket type boarding equipment, it was necessary to raise the arm higher than the handrail of the hanging basket, but in the high-altitude work using the high-altitude work member 1, the first rope Since various postures can be taken if tension is applied to at least one of the 41 and the second rope 42, the work can be performed with the arm extended to a height lower than the base of the arm. Therefore, it is possible to reduce the physical burden and perform the work in a posture in which force can be easily applied. Further, since the work can be performed at a low position, the risk of collision with the operator is reduced even if the cut branch or the like swings.

Further, since a gap can be held between the rotating arm 30 and the frame body 10 and a branch or the like can be sandwiched between them, the aerial work platform 1 can be prevented from shaking or rotating. And you can work in a stable posture.

In addition, since the second hanging support portion 22 for supporting the hanging tool 81 for backup is provided, the other end of the hanging tool 81 to which one end is attached is indirectly or directly to the hook block main body 60. Even if the hanging support portion 21 is detached from the hanging tool such as the hook 62, the aerial work platform member 1 is prevented from falling.

Although the present invention has been described above with reference to suitable embodiments, the present invention is not limited to the above embodiments, and as shown below, various improvements are made without departing from the gist of the present invention. And the design can be changed.

For example, the positions and numbers of the vertical members 11 and the 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.

Further, in the above, the case where the worker uses the aerial work platform 1 as a scaffold and the worker supports the body by the aerial work platform 1 to perform the aerial work is described. While adjusting the lengths of both ropes so that tension is applied to the second rope 42, it is also possible for the worker to go out from the aerial work platform 1 and transfer to the tree to be worked on to perform the work. ..

Specifically, when pruning a tree, conventionally, when a worker climbs the tree and performs the work, a rope or the like that supports the body is fastened to the branch or trunk of the tree. Therefore, if the branch selected as the anchor point is dead or decaying and has low strength, the worker may crash due to the branch breaking. On the other hand, when the work is performed using the aerial work platform 1 of the present embodiment, even if the worker transfers to the tree, the anchor points of the first rope 41 and the second rope 42 are at a high place. Since it is inside the work member 1, even if the branch to which the worker has transferred breaks, the first rope 41 and the second rope 42 can prevent the worker from falling. Further, as a mode in which the worker transfers to the tree and performs the work, a mode in which the first rope 41 is replaced and the anchor point thereof is set on the branch or trunk of the tree can be conceived. Even in this case, since the anchor point of the second rope 42 is inside the aerial work platform 1, even if the branch to which the worker has transferred breaks, the second rope 42 prevents the worker from falling. can do.

In addition, when working with a conventional hanging cage type boarding equipment, control of expansion and contraction of the arm of the crane and control of the length of the rope hanging the hook are performed via the remote controller possessed by the operator. In this case, if the remote controller is dropped or the crane engine is stopped for some reason, these controls cannot be controlled and the operator may not be able to get off the boarding equipment. Workers working in a hanging basket are equipped with a rope to prevent them from falling, but the rope is a fall arrest system rope and can be used to descend to the ground. There wasn't.

On the other hand, the first rope 41 and the second rope 42 worn by the worker who uses the aerial work member 1 are ropes for the work positioning system, respectively, and the first length adjuster 41b. And a second length adjuster 42b. Therefore, even if the operation of the crane cannot be controlled, such as by dropping the remote controller, the length of one of the first rope 41 and the second rope 42 is maintained to maintain the position of the body. By alternately repeating the work of lengthening the other rope, it is possible to safely descend from the aerial work member 1 to the ground.

The aerial work platform 1 of the present embodiment can be used for aerial work such as pruning of trees, but can also be used for rescue work of a person at a high place. If a person is to be rescued with a conventional hanging basket type boarding equipment, it is extremely difficult for the rescued person's body to be pulled into the hanging basket by one worker inside the hanging basket. .. On the other hand, since the aerial work platform 1 of the present embodiment has a frame-shaped structure as a main body, it is easy to transfer the body of the rescued person to the aerial work platform 1. Therefore, the worker who supported the body by the aerial work platform 1 descends the aerial work platform 1 while firmly holding the rescued person's body transferred to the aerial work platform 1. By doing so, one worker can easily lower the rescued person from a high place to the ground.

In addition, the aerial work platform 1 of the present embodiment is a frame-shaped structure and includes a large number of intersections of the respective members. Therefore, work tools and rescue supplies can be hung at these intersections. Therefore, the worker can be made lighter and the physical burden on the worker can be reduced as compared with the case where the worker carries work tools and rescue supplies.

In the above, the work by the work positioning system has been described, but the movement is performed by adjusting the length of the second rope while maintaining the state in which the worker's body is supported or suspended by the first rope. Therefore, as the aerial work using the aerial work member 1, the work by the rope access system is also possible.

1 High-place work member 10 Frame main body 11, 11a, 11b Vertical member 12, 12a, 12b, 12c, 12d, 12e Horizontal member 13a, 13b Outer frame member 14 Protruding member 21 Suspended support 22 Second suspended support 30 Rotating arm 35 Arm holding part 41 First rope 41b First length adjuster 42 Second rope 42b Second length adjuster S1, S2, S3, S4, S5 Closed space

Claims (4)

A frame having 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 a plurality of closed spaces are formed inside. Equipped with a main body,
The lower part of the frame body is tapered and
A member for aerial work, characterized in that a hanging support portion for supporting a hanging tool for suspending the frame body is formed in the center of the upper part of the frame body. A rotating arm that is rotatably supported with respect to the frame body,
The aerial work platform according to claim 1, further comprising an arm holder for holding a state in which a gap is formed between the rotated rotating arm and the frame main body. The height according to claim 1 or 2, wherein the frame main body is provided with a second hanging support portion for supporting a hanging tool for backup, in addition to the hanging support portion. Work parts. It is an aerial work method performed by using the aerial work member according to any one of claims 1 to 3 and the first rope and the second rope.
The first rope has a U-shape 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 having both ends fastened to the worker's abdomen to form a ring shape, or a rope having one end fastened to the worker's abdomen and having a ring-shaped portion that can be opened and closed at the other end. It also has a second length adjuster,
While passing the first rope through both of the two adjacent closed spaces in the aerial work platform,
The second rope is passed through both of the two adjacent closed spaces in a combination different from the closed space through which the first rope is passed among the plurality of closed spaces in the aerial work platform.
By adjusting the length by 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 worker can apply tension to the aerial work platform member. An aerial work platform characterized by supporting the body and working with a work positioning system.

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