Scaffolding device

Abstract

To provide a scaffold device that is easy to handle.SOLUTION: A scaffold device (1) comprises: one cylindrical scaffold body (10); a one-sided mounting portion (20) provided at one end (12) of the scaffold body (10) facing toward a work starting point (SP) and attached to a steel tower (ST); and another side mounting portion (30) provided at the other end (13) of the scaffold body (10) on the opposite side from the one end (12). The other side attachment portion (30) includes: an engagement portion (35) that engages a power transmission line (EW); a flexible connecting portion (34) that is attached to the other end (13) of the scaffold body (10) and connects the other end (13) and the engagement portion (35); an adhered portion (36) provided on the engagement portion (35); and an adhering portion (37) provided on the other end (13) of the scaffold body (10) that is adhered to the adhered portion (36) by folding the connecting portion (34).SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a scaffolding device, and more specifically, to a scaffolding device suspended from overhead equipment during work on the overhead equipment.

Background Art

[0002] As overhead equipment composed of columns arranged at intervals from each other and an overhead object spanned between these columns, there can be mentioned power transmission line facilities including a steel tower or a utility pole corresponding to the above columns (hereinafter simply referred to as "steel tower"), and a power transmission line corresponding to the above overhead object spanned between the steel towers. The power transmission line includes an electric wire for transmitting electricity, an overhead ground wire spanned between, for example, the tops of steel towers to protect the electric wire from lightning strikes, and the like. In such power transmission line facilities, various operations such as repair, maintenance, and inspection of the power transmission line (hereinafter referred to as "power transmission line work"), such as jumper work in which an operator climbs up the steel tower to connect or disconnect a jumper wire, may be performed. An operator performing such power transmission line work needs to get out from the steel tower onto the power transmission line and move to the work location on the power transmission line.

[0003] Therefore, in order to facilitate such movement and secure a scaffold at the work location, a scaffold device having a ladder-like structure may be suspended from the steel tower to a desired position on the power transmission line (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in such a scaffolding device, generally, the scaffold occupies most of the device, and the weight of the scaffold is approximately equal to the weight of the entire scaffolding device. Since the scaffold of the scaffolding device described in Patent Document 1 above is ladder-shaped, it tends to be large, and the number of members constituting the scaffold also increases. Therefore, the entire scaffolding device becomes bulky and heavy. For example, the weight of a scaffolding device equipped with a ladder-shaped scaffold made of JIS standard steel with a total length of 3.0 m is about 20 kg. Physical strength and skills are required to suspend such a scaffolding device between a steel tower and a power transmission line. Therefore, a scaffolding device that is easy to handle is required.

[0006] Also, in work on overhead equipment other than power transmission line facilities, similarly, a scaffolding device that is easy to handle is required.

[0007] The present invention has been made in view of the above points, and one of the problems is to provide a scaffolding device that is easy to handle.

Means for Solving the Problems

[0008] In order to solve the above problems, the present invention is a scaffolding device suspended between the working starting point side and the opposite side of the overhead equipment during work on the overhead equipment, comprising: a single cylindrical scaffold body; one side attachment portion provided at one end of the scaffold body facing the working starting point side and attached to the working starting point side of the overhead equipment; and the other side attachment portion provided at the other end of the scaffold body opposite to the one end side. The other side attachment portion includes an engagement portion that engages with the side of the overhead equipment opposite to the working starting point side, a flexible connecting portion attached to the other end of the scaffold body and connecting the other end and the engagement portion, an adhered portion provided on the engagement portion, and an attachment portion provided at the other end of the scaffold body and attached to the adhered portion by folding the connecting portion.

[0009] Incidentally, the overhead equipment is power transmission line equipment including transmission towers arranged at intervals from each other and power transmission lines attached between the transmission towers. The work starting point side is the transmission tower side in the power transmission line equipment, and the side opposite to the one end side may be the power transmission line side in the power transmission line equipment.

[0010] Further, it is preferable that the engaging portion includes a hook. In this case, it is preferable that the hook faces a direction orthogonal to the axial direction of the scaffold body when the adhering portion is adhered to the adhered portion.

[0011] Further, it is preferable that the adhering portion is composed of adhering members provided at respective portions of the other end portions on the side where the hook faces and the opposite side when the adhering portion is adhered to the adhered portion.

[0012] Further, it is preferable that the other side attachment portion is shorter than the one side attachment portion.

[0013] Further, it is preferable that the above scaffold device further includes a gripping portion attached to the scaffold body. In this case, it is preferable that the gripping portion faces the side opposite to the portion where the connecting portion at the other end portion is attached.

[0014] Further, it is preferable that the above scaffold device further includes an auxiliary scaffold facing the side opposite to the portion where the connecting portion at the other end portion is attached when the scaffold device is suspended.

[0015] Further, it is preferable that the above scaffold device further includes a long and flexible auxiliary portion penetrating the inside of the scaffold body. In this case, one end portion of the auxiliary portion is led out from the one end portion of the scaffold body to the outside of the scaffold body, and the other end portion of the auxiliary portion is led out from the other end portion of the scaffold body to the outside of the scaffold body and fixed to the engaging portion.

Advantages of the Invention

[0016] According to the above invention, it is possible to provide a scaffold device that is easy to handle.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0018] Hereinafter, embodiments for carrying out the scaffolding device according to the present invention are illustrated together with the accompanying drawings. The embodiments illustrated below are for facilitating the understanding of the present invention and are not for limiting the interpretation of the present invention. The present invention can be changed and improved from the following embodiments without departing from its gist. Also, in the above accompanying drawings, the dimensions of each member may be shown exaggerated or reduced for easy understanding.

[0019] The scaffolding device according to the embodiment is suspended between a steel tower and a transmission line for an operator (hereinafter simply referred to as "operator") to step out from the steel tower to the transmission line. FIG. 1 is a side view schematically showing the scaffolding device according to the embodiment.

[0020] As shown in FIG. 1, the scaffolding device 1 mainly includes a scaffolding body 10, a one-side attachment portion 20, an other-side attachment portion 30, a gripping portion 40, an auxiliary scaffold 50, and an auxiliary portion 60.

[0021] The scaffolding body 10 serves as a main scaffold for the operator as will be described later. The scaffolding body 10 is formed from a single long cylindrical member and is, for example, cylindrical, elliptical cylindrical, triangular prismatic, quadrangular prismatic, or polygonal prismatic. In the present embodiment, the scaffolding body 10 is a single cylindrical member.

[0022] The scaffolding body 10 includes a main body portion 11 that occupies most of the scaffolding body 10, one end portion 12 facing the steel tower side when the scaffolding device 1 is suspended between the steel tower and the transmission line, and the other end portion 13 on the side opposite to the one end portion 12 (i.e., facing the transmission line side). The dimensions of the main body portion 11 and the material forming the main body portion 11 are not particularly limited, but are determined from the viewpoints of weight reduction and handling performance improvement of the scaffolding device. Regarding the dimensions of the main body portion 11, the length in the direction of the central axis X of the scaffolding body 10 (hereinafter referred to as the "axial direction") may be 2.0 m to 4.0 m, and is 3.0 m in the present embodiment. Also, the outer diameter of the main body portion 11 may be 4.0 cm to 5.0 cm, and is 4.92 cm in the present embodiment. Regarding the material forming the main body portion 11, it is FRP (Fiber Reinforced Plastics) in the present embodiment.

[0023] Each of the one end portion 12 and the other end portion 13 of the scaffolding body 10 is a cylindrical member having an inner diameter substantially the same as the outer diameter of the scaffolding body 10. One end portion of the main body portion 11 is fitted into the inside of the one end portion 12, and the other end portion of the main body portion 11 is fitted into the inside of the other end portion 13. Thus, each of the one end portion 12 and the other end portion 13 is fixed to the main body portion 11.

[0024] From a portion on one side of the outer peripheral surface of one end portion 12 of the scaffold body 10 with respect to the central axis X, a ring-shaped member 21 protrudes in a direction orthogonal to the axial direction of the scaffold body 10. The protruding direction of this ring-shaped member 21 is generally vertically upward (hereinafter, vertically upward may be simply described as "up", "upper side", or "above") when the scaffold device 1 is suspended between the iron tower and the transmission line. Further, from a portion on the outer peripheral surface of the one end portion 12 that is opposite to the ring-shaped member 21 with respect to the central axis X, a ring-shaped member 22 having substantially the same dimensions and shape as the ring-shaped member 21 protrudes in a direction opposite to the protruding direction of the ring-shaped member 21. That is, the protruding direction of the ring-shaped member 22 is generally vertically downward (hereinafter, vertically downward may be simply described as "down", "lower side", or "below") when the scaffold device 1 is suspended between the iron tower and the transmission line. In the present embodiment, each of the ring-shaped members 21 and 22 is a metal member integrally formed with the one end portion 12. That is, in the present embodiment, the ring-shaped members 21 and 22 and the one end portion 12 of the scaffold body 10 are each a part of one terminal fitting 80.

[0025] FIG. 2 is a view showing a cross-section along a plane perpendicular to the central axis X showing the other end portion 13 and the like in the state of FIG. 1, and is a view seen from the one end portion 12 side toward the other end portion 13 side along the axial direction. As shown in FIGS. 1 and 2, a ring-shaped member 31 that protrudes upward is provided at the upper end portion 13a of the other end portion 13 of the scaffold body 10, similarly to the ring-shaped member 21. In the present embodiment, the ring-shaped member 31 is a metal member integrally formed with the other end portion 13. That is, in the present embodiment, the ring-shaped member 31 and the other end portion 13 of the scaffold body 10 are each a part of one terminal fitting 90.

[0026] As shown in FIG. 1, the one-side attachment portion 20 is provided at one end portion 12 of the scaffold body 10. The one-side attachment portion 20 includes a ring-shaped member 21 that is a part of the terminal fitting 80, a connection portion 23, a long portion 24, and a locking portion 25.

[0027] The connecting part 23 is not particularly limited as long as it is a member for connecting the ring-shaped member 21 and the long part 24. In this embodiment, it is a carabiner and may be, for example, a double-lock type carabiner. The connecting part 23 is hooked on the ring-shaped member 21. The long part 24 is not particularly limited as long as it is a flexible long member. In this embodiment, it is composed of a belt sling. One end of the long part 24 is, for example, tied to the connecting part 23 and fixed to the connecting part 23. The locking part 25 is not particularly limited as long as it is a member configured to be engageable with another member. In this embodiment, it is a carabiner and may be, for example, a double-lock type carabiner. The other end of the long part 24 is, for example, tied to and fixed to this locking part 25.

[0028] As shown in FIG. 1, the other-side attachment part 30 is provided at the other end part 13 of the scaffold main body 10. The other-side attachment part 30 includes a connecting part 34, an engaging part 35, an attaching part 37, and an adherend part 36.

[0029] The connecting portion 34 has a ring-shaped member 31 which is a part of the terminal fitting 90, a connecting portion 32, and an elongated portion 33. That is, the upper end portion 13a (see FIG. 2) of the other end portion 13 where the ring-shaped member 31 is provided is the portion where the connecting portion 34 of the other end portion 13 is attached. The connecting portion 32 is not particularly limited as long as it is a member that connects the ring-shaped member 31 and the elongated portion 33. In this embodiment, it is a carabiner and may be, for example, a double-lock type carabiner. The connecting portion 32 is hooked on the ring-shaped member 31. The elongated portion 33 is not particularly limited as long as it is an elongated member having flexibility. In this embodiment, it is made of a belt sling. Thus, since the connecting portion 34 includes the flexible elongated portion 33, it has flexibility. The total length of the elongated portion 33 of the other-side attachment portion 30 may be the same as, longer than, or shorter than the total length of the elongated portion 24 of the one-side attachment portion 20. In this embodiment, the total length of the elongated portion 33 is shorter than the total length of the elongated portion 24. Here, the total length of the elongated portion 33 occupies most of the total length of the other-side attachment portion 30, and the total length of the elongated portion 24 occupies most of the total length of the one-side attachment portion 20. Therefore, in this embodiment, the total length of the other-side attachment portion 30 is shorter than the total length of the one-side attachment portion 20. One end of the elongated portion 33 of the other-side attachment portion 30 is, for example, tied to and fixed to the connecting portion 32.

[0030] The engaging portion 35 is not particularly limited as long as it is a member that can engage with the power transmission line. In this embodiment, it is made of a hook and may be, for example, a single hook or a double hook provided with a retaining device. The engaging portion 35 includes a first portion 35a formed in a hook shape or a substantially U shape, and a second portion 35b connected to one end of the first portion 35a. The first portion 35a engages with the power transmission line. In FIG. 1, the direction Df in which the hook faces is shown to be parallel to the axial direction and facing the side opposite to the one-side attachment portion 20 side. The second portion 35b is integrally formed with the first portion 35a. At the end of the second portion 35b on the side opposite to the first portion 35a side, the end of the elongated portion 33 on the side opposite to the connecting portion 32 side is, for example, tied to and fixed. Thus, the engaging portion 35 is connected to the other end portion 13 of the scaffold body 10 via the flexible connecting portion 34.

[0031] The adhering part 37 is not particularly limited as long as it is a member that can adhere to the adherend part 36. In this embodiment, it is a magnet. More specifically, it consists of a pair of plate-shaped magnets 37a and 37b, which are a pair of adhering members. Further, in this embodiment, the magnets 37a and 37b are each a disk. As shown in FIGS. 1 and 2, the pair of magnets 37a and 37b are provided on the outer peripheral surface of the other end portion 13 and are provided on both sides with reference to the upper end portion 13a. That is, in the state of FIGS. 1 and 2, the pair of magnets 37a and 37b face each other in a direction perpendicular to both the vertical direction and the axial direction. Note that the direction in which the magnets 37a and 37b face each other in the state of FIGS. 1 and 2 is referred to as the left-right direction. For convenience, the side of the magnet 37a with reference to the upper end portion 13a in this state may be referred to as "left", and the side of the magnet 37b with reference to the upper end portion 13a may be referred to as "right".

[0032] The adherend part 36 is not particularly limited as long as it is a member to which the adhering part 37 can adhere. As described above, since the adhering part 37 is a magnet in this embodiment, the adherend part 36 is formed of a magnetic material (for example, a metal such as iron, nickel, or cobalt) to which a magnet can adhere. FIG. 3 is an enlarged view showing the engaging part 35 and the adherend part 36 in the state of FIG. 1, and shows a state seen along the axial direction from the one end portion 12 side toward the other end portion 13 side. Therefore, in FIG. 3, the direction from the front side of the paper surface toward the back side of the paper surface is the direction Df in which the hook faces. As shown in FIGS. 1 and 3, the adherend part 36 is a substantially rectangular plate-shaped member and is provided on the second part 35b of the engaging part 35. The main surfaces 36f on both sides of the adherend part 36 extend in a direction perpendicular to the direction Df in which the hook faces (the axial direction in the state of FIG. 1), and are adherend surfaces to which the magnets 37a and 37b can adhere. Note that in the state of FIG. 1, the main surfaces 36f of the adherend part 36 each extend from the second part 35b along the direction in which the pair of magnets 37a and 37b face each other (that is, the left-right direction in the states of FIGS. 1 and 2).

[0033] As shown in FIG. 1, the gripping portion 40 is attached to the main body portion 11 of the scaffold main body 10. In the present embodiment, the gripping portion 40 is attached to the one end portion 12 side with reference to the center in the axial direction of the main body portion 11. More specifically, the gripping portion 40 is attached at a position shifted toward the other end portion 13 side by approximately 1 / 4 of the length in the axial direction from the one end portion 12. Note that the position where the gripping portion 40 is attached is not limited to this. In the present embodiment, the gripping portion 40 includes a fixing portion 41 and a grip portion 42. The fixing portion 41 is made of, for example, a metal fitting fixed to the main body portion 11 of the scaffold main body 10. The grip portion 42 is made of, for example, a cylindrical member made of a polyethylene resin or the like, and is fixed to the fixing portion 41 so as to extend in a direction perpendicular to the axial direction (the left - right direction in the state of FIG. 1). An opening 40o is formed between the grip portion 42 and the main body portion 11 of the scaffold main body 10. This grip portion 42 is located on the side opposite to the portion (the upper end portion 13a in FIG. 2) where the connecting portion 34 at the other end portion 13 is attached, and is located below with reference to the central axis X in the state of FIG. 1. Thus, the gripping portion 40 faces the side opposite to the portion where the connecting portion 34 at the other end portion 13 is attached.

[0034] The auxiliary scaffold 50 is attached to the main body portion 11 of the scaffold main body 10. In the present embodiment, the auxiliary scaffold 50 is attached to the other end portion 13 side with reference to the center in the axial direction of the main body portion 11. In the present embodiment, the auxiliary scaffold 50 includes an attachment member 51 and a suspension ring 52 having a ring-shaped portion 52a attached to the tip. The attachment member 51 is formed in a ring shape and is slidably attached to the main body portion 11 along the axial direction. In the present embodiment, the movement of the attachment member 51 is restricted by a magic tape (registered trademark) (not shown) provided in the vicinity of the attachment member 51 of the main body portion 11. The user (worker) of the scaffolding device 1 can move the attachment member 51 along the axial direction by loosening this magic tape (registered trademark). An end portion of the attachment member 51 on the side opposite to the ring-shaped portion 52a side of the suspension ring 52 is fixed. As shown in FIG. 5 described later, the worker can make the auxiliary scaffold 50 compact by winding the suspension ring 52 around the main body portion 11. Further, as shown in FIG. 1, the worker can turn the ring-shaped portion 52a to the side opposite to the portion where the connecting portion 34 at the other end portion 13 is attached (the lower side in the state of FIG. 1) by unwinding the suspension ring 52 wound around the main body portion 11. The opening 52o of the ring-shaped portion 52a has an inner diameter that allows the worker's foot to be inserted.

[0035] The auxiliary portion 60 is a long and flexible member, and is a rope-shaped member in the present embodiment. The material forming the auxiliary portion 60 is not particularly limited, and may be, for example, nylon. Further, the auxiliary portion 60 may have a strength equal to or higher than that of the main body portion 11 of the scaffold main body 10, for example. The auxiliary portion 60 penetrates inside the scaffold main body 10. One end portion 62 of the auxiliary portion 60 is led out from one end portion 12 of the scaffold main body 10 to the outside of the scaffold main body 10 and is fixed to the locking portion 70. This locking portion 70 is not particularly limited as long as it is a member that can engage with other members, but in the present embodiment, it is a carabiner and may be a double-lock type carabiner, for example. The other end portion 63 of the auxiliary portion 60 is led out from the other end portion 13 of the scaffold main body 10 to the outside of the scaffold main body 10 and is, for example, tied and fixed to the second portion 35b of the engaging portion 35.

[0036] FIG. 4 is a cross-sectional view taken along a plane perpendicular to the central axis X of the main body portion 11 of the scaffold main body 10. As shown in FIG. 4, a tubular member 71 is fitted inside the main body portion 11. In the present embodiment, the outer peripheral surface of the tubular member 71 is in full contact with the inner peripheral surface of the main body portion 11. The tubular member 71 is not particularly limited, and for example, it may be a PF (Plastic Flexible) tube. By providing such a tubular member 71, the auxiliary portion 60 does not directly touch the main body portion 11, so that it is possible to prevent the auxiliary portion 60 from being damaged due to contact with the main body portion 11. Note that it is not essential to provide the tubular member 71.

[0037] Next, an example of the use of the scaffold device 1 and the actions and effects of the scaffold device at that time will be described.

[0038] As described above and as shown in FIG. 1, the other-side attachment portion 30 includes an engaging portion 35 formed of a hook, an attached portion 36 provided on the second portion 35b of the engaging portion 35, an attachment portion 37 (a pair of magnets 37a, 37b) provided at the other end portion 13 of the scaffold main body 10, and a connecting portion 34 that connects the other end portion 13 and the engaging portion 35. The connecting portion 34 has a flexible elongated portion 33. According to such a configuration, by folding the elongated portion 33 of the connecting portion 34, the attachment portion 37 can be attached to the attached portion 36. FIG. 5 is a view showing a state in which the engaging portion 35 is engaged with the power transmission line. In FIG. 5, a state in which the elongated portion 33 is folded and the attachment portion 37 is attached to the attached portion 36 is shown.

[0039] As described above, the main surface 36f, which is the adherend surface of the adherend portion 36, is orthogonal to the direction Df in which the hook faces. Since the elongated portion 33 of the connecting portion 34 has flexibility, the engaging portion 35 can be turned to the right and the direction Df in which the hook faces can be made to the right from the state of FIG. 1. While maintaining this state, when the scaffold main body 10 is rotated 180 degrees to the right about the axis and the elongated portion 33 is folded upward, as shown in FIG. 5, the magnet 37a, which was located on the left side in the states of FIGS. 1 and 2, can be attached to the main surface 36f. That is, in the state of FIG. 5, the positions of the magnets 37a and 37b in the left-right direction are reversed from those in FIG. 1, and the magnet 37b, which could not be visually recognized because it was located on the right side in the state of FIG. 1, is now located on the left side and is in a visually recognizable state. In this way, when the scaffold main body 10 rotates half a turn about the axis and the magnet 37a is fixed to the adherend portion 36, the portion (the upper end portion 13a in FIG. 2) where the connecting portion 34 at the other end 13 is attached faces downward, and the gripping portion 40 faces upward. In the state of FIG. 5, since the connecting portion 34 is folded and made compact, for example, the scaffold device 1 can be easily transported and handled.

[0040] Next, when the scaffold device 1 is used for transmission line work, after the worker climbs the tower and reaches a predetermined position of the tower, the worker can hang a rope (not shown) on the opening 40o of the gripping portion 40 and pull up the scaffold device 1 to the position of the worker (that is, the above-mentioned predetermined position) by this rope. Note that the worker may transport the scaffold device 1 to the predetermined position by himself / herself without using a rope.

[0041] After the scaffold device 1 is pulled up to the above-mentioned predetermined position and the rope passed through the opening 40o is removed from the scaffold device 1, as shown in FIG. 5, the worker WM positions himself / herself at the above-mentioned predetermined position of the tower and its vicinity, and while maintaining the state in which the connecting portion 34 (elongated portion 33) is folded, moves the scaffold main body 10 mainly in the vertical direction and the left-right direction to engage the engaging portion 35 with the transmission line EW.

[0042] When engaging the engaging portion 35 with the power transmission line EW in this manner, as shown in FIG. 5, the worker WM can grip the grip portion 42 of the gripping portion 40 facing upward. Therefore, it is easier to move the scaffold body 10 compared to the case of directly gripping the main body portion 11 of the scaffold body 10.

[0043] Also, in the state of FIG. 5, the adhering portion 37 is adhered to the adhered portion 36. As described above, the adhering portion 37 is attached to the other end portion 13 of the scaffold body 10, and the adhered portion 36 is attached to the engaging portion 35. Therefore, in the state of FIG. 5, the other end portion 13 of the scaffold body 10 is directly fixed to the engaging portion 35. Thus, even if the scaffold body 10 is moved, it is not affected by the play of the connecting portion 34 (long portion 33), so the movement locus of the scaffold body 10 and the movement locus of the engaging portion 35 are substantially the same. Therefore, it is easy to engage the engaging portion 35 with the power transmission line EW and easy to handle.

[0044] Incidentally, when hooking the hook onto a long object, if the angle formed between the direction in which the hook faces and the direction of the long object is perpendicular, it is easier to hook the hook onto the long object than when this angle is non-perpendicular. Therefore, when hooking the hook onto a long object, it is preferable to make the direction in which the hook faces and the direction of the long object approach perpendicular as much as possible. When the direction in which the hook faces is non-perpendicular to the axial direction of the scaffold body 10, in order to make the direction in which the hook faces and the direction of the power transmission line EW corresponding to the long object approach perpendicular, it is necessary to hold the scaffold body 10 obliquely with respect to the power transmission line EW. To hold the scaffold body 10 obliquely in this way, the operator needs to position himself at a position away from the power transmission line EW. On the other hand, in the present embodiment, since the direction Df in which the hook faces when the adhering portion 37 is adhered to the adhered portion 36 is perpendicular to the axial direction of the scaffold body 10, by holding the scaffold body 10 parallel to the power transmission line EW, the direction Df in which the hook faces can be made perpendicular to the direction of the power transmission line EW. That is, in the present embodiment, in order to make the direction Df in which the hook faces and the direction of the power transmission line EW perpendicular, it is not necessary to hold the scaffold body 10 obliquely with respect to the power transmission line EW. Therefore, in the present embodiment, the operator WM can perform the operation of engaging the hook with the power transmission line EW in a state where the direction Df in which the hook faces and the direction of the power transmission line EW are nearly perpendicular at a position close to the power transmission line EW. Thus, workability can be further improved.

[0045] However, according to the scaffold device 1, even if the angle formed between the direction Df in which the hook faces and the axial direction of the scaffold body 10 is non-perpendicular when the adhering portion 37 is adhered to the adhered portion 36, the hook can be engaged with the power transmission line EW with the other end portion 13 of the scaffold body 10 directly fixed to the engaging portion 35. That is, even if the above angle is non-perpendicular, it still remains unaffected by the play of the connecting portion 34, so it is still easy to engage the engaging portion 35 with the power transmission line EW and it is easy to handle.

[0046] After engaging the engaging portion 35 with the power transmission line EW to obtain the state of FIG. 5, the operator WM can release the adhered state between the adhering portion 37 and the adhered portion 36, for example, as follows.

[0047] First, the operator WM grips the gripping portion 40 and rotates the scaffold body 10 approximately 90 degrees around the axis in the direction opposite to the direction Df in which the hook faces. As described above, the direction Df in which the hook faces in the state of FIG. 5 is to the right. Therefore, in this embodiment, the operator WM rotates the scaffold body 10 approximately 90 degrees counterclockwise around the axis. FIG. 6 shows a state in which the scaffold body 10 is rotated approximately 90 degrees counterclockwise around the axis. As shown in FIG. 6, by rotating the scaffold body 10 approximately 90 degrees counterclockwise around the axis, the gripping portion 40 faces left. Also, due to this counterclockwise rotation, the magnet 37b is positioned on the lower side and the magnet 37a is positioned on the upper side. Focusing on the upper side with respect to the central axis X of the scaffold body 10, from the upper side to the lower side, the engaging portion 35, the adhered portion 36, the magnet 37a, and the other end portion 13 are arranged in this order.

[0048] Next, the operator WM grips the gripping portion 40 and presses the scaffold body 10 downward while rotating the scaffold body 10 approximately 90 degrees counterclockwise around the axis from the state of FIG. 6. At this time, in the state of FIG. 6, since the engaging portion 35 is engaged with the power transmission line EW, the downward movement of the engaging portion 35 and the adhered portion 36 is restricted. For this reason, the downward pressing force effectively acts on the magnet 37a and the other end portion 13 of the scaffold body 10. As a result, as shown in FIG. 7, the adhesion state between the adhering portion 37 and the adhered portion 36, that is, the fixed state between the engaging portion 35 and the other end portion 13 is released, the magnet 37a and the other end portion 13 are separated from the adhered portion 36 and the engaging portion 35, and the folded state of the long portion 33 is released. Thus, the long portion 33 returns to its original length. Also, since the scaffold body 10 is rotated approximately 90 degrees counterclockwise from the state of FIG. 6 (that is, rotated 180 degrees from the state of FIG. 5), in the state of FIG. 7, the orientation of the portion (upper end portion 13a) where the connecting portion 34 of the other end portion 13 is attached and the orientation of the gripping portion 40 return to the states of FIG. 1 respectively. That is, the orientation of the portion (upper end portion 13a) where the connecting portion 34 of the other end portion 13 is attached becomes the upper side, and the orientation of the gripping portion 40 becomes the lower side. Also, the auxiliary scaffold 50 faces downward. Thus, the adhesion state between the adhering portion 37 and the adhered portion 36 is released, and the attachment of the other side attachment portion 30 to the power transmission line EW is completed.

[0049] In the example of this embodiment, an example in which the engaging portion 35 is fixed to the scaffold main body 10 with the direction D in which the hook faces being to the right by attaching the magnet 37a to the adherend portion 36 has been described. However, in the scaffold device 1, magnets, which are attachment members, are attached to both the left and right sides. Therefore, it is also possible to attach the magnet 37b to the adherend portion 36 and fix the engaging portion 35 to the other end portion 13 of the scaffold main body 10 with the direction Df in which the hook faces being to the left. When the direction Df in which the hook faces is to the left, in order to release the fixed state between the engaging portion 35 and the scaffold main body 10 after engaging the engaging portion 35 with the power transmission line EW, the scaffold main body 10 may be rotated approximately 90 degrees to the right about the axis, and then the scaffold main body 10 may be pushed downward while being rotated approximately 90 degrees to the right about the axis.

[0050] Since the scaffold device 1 is provided with the gripping portion 40, it is easy to rotate the scaffold main body 10 about the axis by gripping the gripping portion 40 as described above.

[0051] In this embodiment, after the operator WM sets the scaffold device 1 in the state shown in FIG. 7, the operator attaches the one-side attachment portion 20 to the iron tower. FIG. 8 is a diagram showing a state in which the scaffold device is suspended from the power transmission line facility, and shows a state in which the one-side attachment portion 20 is attached to the iron tower ST. In FIG. 8, for the sake of convenience, the illustration of the operator is omitted.

[0052] As shown in FIG. 8, the operator wraps the long portion 24 of the one-side attachment portion 20 around the position (or its vicinity) SP of the operator on the iron tower ST, and in this embodiment, engages the locking portion 25 of the one-side attachment portion 20 with the lower ring-shaped member 22. As a result, the one-side attachment portion 20 is attached to the iron tower ST. Note that the locking portion 25 may be engaged with the ring-shaped member 21. Alternatively, after wrapping the long portion 24 of the one-side attachment portion 20 around the position SP, the locking portion 25 may be engaged with the connection portion 23 or the long portion 24. Further, the auxiliary portion 60 led out from one end portion 12 of the scaffold body 10 is wrapped around the vicinity of the above position SP, and the locking portion 70 fixed to one end portion 62 of the auxiliary portion 60 is engaged with the portion led out from one end portion 12 of the auxiliary portion 60 to the outside. As a result, the auxiliary portion 60 is attached to the iron tower ST. In this way, when the one-side attachment portion 20 is attached to the iron tower ST and the other-side attachment portion 30 is attached to the power transmission line EW, the scaffold device 1 is suspended between the iron tower ST and the power transmission line EW, and the state shown in FIG. 8 is achieved.

[0053] As described above, since the position SP, which is the portion of the iron tower ST where the one-side attachment portion 20 is attached (the portion around which the long portion 24 is wrapped), is the position of the operator or its vicinity, this position SP can be regarded as the work starting point SP for the power transmission line work. That is, in the state of FIG. 8, the one-side attachment portion 20 is attached to the iron tower ST on the work starting point SP side of the power transmission line facility. Further, one end portion 12 of the scaffold body 10 is the end portion directed toward the work starting point SP side in the scaffold body 10 and is located near the work starting point SP. After the state of FIG. 8 is achieved, the operator at the work starting point SP (or who can be considered to be there) can place a foot on the upper surface of the main body portion 11 near the one end portion 12 and then move on the main body portion 11 toward the other end portion 13 side starting from the work starting point SP. In this way, the scaffold body 10 functions as the main scaffold in the power transmission line work. The operator can easily move to the position where the power transmission line work is to be performed by using the scaffold body 10 as a scaffold and gripping insulators or the like (not shown) provided on the power transmission line EW.

[0054] Also, in the state of FIG. 8, since the gripping portion 40 faces downward, it is suppressed that the gripping portion 40 hinders the movement when the operator moves on the main body portion 11.

[0055] Also, in the state of FIG. 8, the auxiliary scaffold 50 facing downward is provided on the side closer to the other-side attachment portion 30. Therefore, after the operator reaches the position where the power line work is to be performed, for example, the operator can put his / her foot into the opening 52o of the auxiliary scaffold 50 while sitting on the main body portion 11. By doing so, the operator can stabilize his / her posture at the position where the power line work is to be performed, and the work efficiency of the power line work can be improved.

[0056] Also, the scaffold device 1 of the present invention includes an auxiliary portion 60 penetrating through the inside of the scaffold main body 10. The other-side end portion 63 of this auxiliary portion 60 is fixed to the engaging portion 35. Therefore, by winding the auxiliary portion 60 around the iron tower ST and fixing it to the iron tower ST as described above, in addition to the scaffold main body 10, the auxiliary portion 60 is suspended between the iron tower ST and the power line EW. Therefore, even if the scaffold main body 10 cracks and splits, the splitting of the scaffold device 1 itself is avoided by the auxiliary portion 60.

[0057] Also, in addition to the above-described effects, the scaffold device 1 exhibits, for example, the following effects.

[0058] In the scaffold device 1, since the scaffold main body 10 serving as the main scaffold is composed of one cylindrical member, the structure of the scaffold is simpler than that of a scaffold device having a scaffold configured, for example, in a ladder shape, and the scaffold can be miniaturized. Therefore, even if the scaffold main body is configured with the same material as that of a ladder-shaped scaffold, it is possible to reduce the weight compared to the scaffold device with a ladder-shaped scaffold. In particular, in the scaffold device 1 of the present embodiment, as described above, the scaffold main body 10 is formed of FRP. Since FRP is a lightweight and high-strength material, it is possible to reduce the total weight of the scaffold device to about 7.0 kg. Thus, according to the scaffold device 1 of the present embodiment, it is easy to reduce the weight, and the handleability is improved by the weight reduction.

[0059] Incidentally, as shown in Fig. 8, the other-side attachment portion 30 (long portion 33) is attached to the power transmission line EW without being wound around. Therefore, the vertical length of the other-side attachment portion 30 in the state where the scaffold device 1 is suspended between the power transmission line EW and the iron tower ST as shown in Fig. 8 is approximately equal to the original length. On the other hand, the one-side attachment portion 20 (long portion 24) is wound around and attached to the iron tower ST as shown in Fig. 8. Therefore, the vertical length of the one-side attachment portion 20 in the state where the scaffold device 1 is suspended as shown in Fig. 8 becomes shorter than the original length, for example, approximately 1 / 2 of the original length. For this reason, when the length of the other-side attachment portion 30 is the same as or longer than the length of the one-side attachment portion 20, in the state where the scaffold device 1 is suspended between the power transmission line EW and the iron tower ST, the scaffold main body 10 tilts upward from the other end portion 13 toward the one end portion 12. However, in the present embodiment, as described above, since the long portion 33 of the other-side attachment portion 30 is shorter than the long portion 24 of the one-side attachment portion 20, the other-side attachment portion 30 is shorter than the one-side attachment portion 20. Therefore, in the state where the scaffold device 1 is suspended between the power transmission line EW and the iron tower ST, the scaffold main body 10 is suppressed from tilting upward from the other end portion 13 toward the one end portion 12 as described above. Note that the length of the other-side attachment portion 30 may be, for example, 1 / 2 of the length of the one-side attachment portion 20.

[0060] As described above, the scaffold device 1 according to the present embodiment includes one cylindrical scaffold main body 10, a one-side attachment portion 20 provided at one end portion 12 of the scaffold main body 10 facing the work starting point SP side and attached to the work starting point SP side (iron tower ST) of the overhead equipment, and the other-side attachment portion 30 provided at the other end portion 13 of the scaffold main body 10 opposite to the one end portion 12 side. The other-side attachment portion 30 includes an engaging portion 35 that engages with the side opposite to the work starting point SP side (power transmission line EW) of the overhead equipment, a connecting portion 34 that is attached to the other end portion 13 of the scaffold main body 10 and has flexibility to connect the other end portion 13 and the engaging portion 35, an adhered portion 36 provided on the engaging portion 35, and an attaching portion 37 provided on the other end portion 13 of the scaffold main body 10 and attaching to the adhered portion 36 by folding the connecting portion 34. According to the present embodiment, with such a configuration, a scaffold device that is easy to handle is realized.

[0061] As described above, the present invention has been described by taking the above embodiment as an example. However, the present invention is not limited to this.

[0062] For example, in the above embodiment, an example has been described in which the attachment portion 37 is formed by a pair of attachment members (magnets 37a, 37b) provided at the portions of the other end portion 13 on the side where the engaging portion 35 faces and the opposite side when the attachment portion 37 is attached to the adherend portion 36. However, the present invention is not limited to this. For example, the direction in which the pair of attachment members face may be oblique with respect to the left - right direction. Alternatively, magnets may be attached as attachment members at positions that are line - symmetric with respect to the central axis X on the outer peripheral surface of the other end portion 13. Further, one ring - shaped magnet may be attached as an attachment member at a predetermined position in the axial direction on the outer peripheral surface of the other end portion 13.

[0063] In the above embodiment, an example has been described in which the attachment portion 37 is formed of a magnet and the adherend portion 36 is formed of a magnetic material. However, the attachment portion 37 may be formed of a magnetic material and the adherend portion 36 may be formed of a magnet.

[0064] In the above embodiment, an example has been described in which the attachment portion and the adherend portion are magnetically attached and fixed to each other. However, the present invention is not limited to this. For example, the attachment portion and the adherend portion may be configured such that one is structurally coupled (e.g., fitted) to the other and attached to each other. That is, the concept of "attachment" in this specification includes not only the relationship in which one is magnetically attached to the other, but also the relationship in which one is structurally coupled to the other.

[0065] In the above embodiment, an example has been described in which the gripping portion 40 faces the side opposite to the portion where the connecting portion 34 is attached at the other end portion 13. However, this configuration is not essential. However, from the viewpoint of suppressing the gripping portion 40 from interfering with the movement when the operator moves on the scaffold body 10, it is preferable that the gripping portion 40 faces a side other than the side where the connecting portion 34 is attached at the other end portion 13. Also, it is not essential to provide the gripping portion 40.

[0066] In addition, in the above-described embodiment, an example in which the scaffold device includes the auxiliary scaffold 50 has been described, but it is not essential to provide the auxiliary scaffold 50.

[0067] In addition, in the above-described embodiment, an example in which the scaffold device includes the auxiliary unit 60 has been described, but it is not essential to provide the auxiliary unit 60.

[0068] In addition, in the above-described embodiment, for the sake of explanation, an example in which the other-side attachment portion 30 is attached to the power transmission line EW and then the one-side attachment portion 20 is attached to the tower ST has been described. However, the other-side attachment portion 30 may be attached to the power transmission line EW after the one-side attachment portion 20 is attached to the tower ST.

[0069] In addition, in the above-described embodiment, an example in which the scaffold device is used for power transmission line work has been described. However, the scaffold device of the present invention can also be used in work on other overhead facilities.

Explanation of Reference Numerals

[0070] 1... Scaffold device, 10... Scaffold body, 12... One end portion, 13... The other end portion, 13a... Upper end portion (portion where the connecting portion is attached), 20... One-side attachment portion, 30... The other-side attachment portion, 34... Connecting portion, 35... Engaging portion, 36... Adhered portion, 37... Adhesive portion, 37a, 37b... Magnets (a pair of attachment members), 40... Gripping portion, 50... Auxiliary scaffold, 60... Auxiliary unit, Df... Direction in which the hook faces, EW... Power transmission line, SP... Work starting point, ST... Tower

Claims

1. A scaffold device suspended between the working starting side and the opposite side of the overhead equipment during work on the overhead equipment, including a single cylindrical scaffold body, one end portion of the scaffold body facing the working starting side is provided with one-side attachment portion attached to the working starting side of the overhead equipment, the other end portion of the scaffold body opposite to the one end portion side is provided with the other-side attachment portion, and comprising the other-side attachment portion includes an engaging portion that engages with the side of the overhead equipment opposite to the working starting side, a flexible connecting portion attached to the other end portion of the scaffold body and connecting the other end portion and the engaging portion, an adhered portion provided on the engaging portion, an adhering portion provided on the other end portion of the scaffold body and adhering to the adhered portion by folding the connecting portion, and including The scaffold device is characterized by the above.

2. The overhead equipment is power transmission line equipment including towers arranged at intervals from each other and power transmission lines attached between the towers, the working starting side is the tower side in the power transmission line equipment, the side opposite to the one end portion side is the power transmission line side in the power transmission line equipment The scaffold device according to claim 1, characterized by the above.

3. The engaging portion includes a hook The scaffold device according to claim 1 or 2, characterized by the above.

4. The hook faces a direction perpendicular to the axial direction of the scaffold body when the adhering portion is attached to the adhered portion. The scaffold device according to claim 3, characterized by the above.

5. The attachment part is composed of attachment members provided on the side where the hook faces and the opposite side when the attachment part is attached to the adherend part, respectively. The scaffolding device according to claim 3 or 4, characterized in that.

6. The other mounting part is shorter than the one mounting part. The scaffolding device according to any one of claims 1 to 5, characterized in that.

7. The scaffolding device further includes a gripping part attached to the scaffolding body. The scaffolding device according to any one of claims 1 to 6, characterized in that.

8. The gripping part faces the side opposite to the part where the connecting part is attached at the other end. The scaffolding device according to claim 7, characterized in that.

9. The scaffolding device further includes an auxiliary scaffold that faces the side opposite to the part where the connecting part is attached at the other end when the scaffolding device is suspended. The scaffolding device according to any one of claims 1 to 8, characterized in that.

10. The scaffolding device further includes a long and flexible auxiliary part penetrating through the inside of the scaffolding body. One end of the auxiliary part is led out from the one end of the scaffolding body to the outside of the scaffolding body, and the other end of the auxiliary part is led out from the other end of the scaffolding body to the outside of the scaffolding body and fixed to the engaging part. The scaffolding device according to any one of claims 1 to 9, characterized in that.

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