JP6894101B2 - Utility pole removal tool and utility pole removal method - Google Patents

Description

The present invention relates to a utility pole removing tool and a utility pole removing method that can remove utility poles with a relatively small number of workers even in a narrow area.

A construction method is known in which the upper part of a utility pole is supported by a utility pole support device, and the lower part is cut by a utility pole cutting device to sequentially divide and remove the utility pole. Patent Document 1 describes a configuration in which such a utility pole support device and a utility pole cutting device are supported by a support arm extending from a construction vehicle.

In the configuration of Patent Document 1, a construction vehicle is used because the support arm becomes longer according to the length of the utility pole and cannot be handled manually. Therefore, it is not possible to work in a narrow area where vehicles cannot enter.

Patent Document 2 discloses a technique for removing columnar objects in a narrow area. In the configuration of Patent Document 2, a rotatable columnar object removing device is attached to the base of the utility pole. The columnar object removing device is composed of a base frame and a rotating frame provided so as to be rotatable relative to the base frame. The base frame is fixed to the base of the utility pole, and the rotating frame is fixed to the utility pole body side to be cut down. With such a configuration, when the utility pole is cut between the base frame and the rotating frame, the utility pole main body side cut by the rotation of the rotating frame portion can be safely tilted.

Further, as a conventional example introduced in Patent Document 2, there is a description of a construction method in which a hanging tool provided with a pulley is fixed to a utility pole and the utility pole is separately removed from the upper end. This division and removal will be described with reference to the figure.

FIG. 10 is a diagram showing a conventional utility pole removal method. First, as shown in (A), a hanging tool equipped with a pulley is arranged at a position lowered by a predetermined dimension from the tip of the utility pole. Then, cutting is performed with the rope hung on the pulley fixed to the side to be cut of the utility pole. Subsequently, as shown in (B), a part of the cut utility pole is lowered using a rope. Such work is repeated as shown in (C) and (D), and when the length is shortened to some extent, the root portion is cut as shown in (E) and pulled down as shown in (F).

JP-A-2002-359908 Japanese Unexamined Patent Publication No. 2006-63730

However, even with the configuration as in Patent Document 2, it is necessary to secure at least a space for laying down the cut utility pole main body side.

Further, as in the conventional example shown in FIG. 10, when the hanging tool provided with the pulley is fixed to the utility pole and the utility pole is cut out in sequence, it is necessary to move the position of the hanging tool downward every time the utility pole is cut. .. However, since the hanging tool is fixed to the utility pole to be cut, the hanging tool is at a higher position than the remaining utility pole portion after the utility pole is cut. Therefore, there is no support for suspending the hanging tool at a stable position above. Therefore, it is not easy to remove the hanging tool on the pillar and move it downward for the next cutting.

Therefore, an object of the present invention is to provide a utility pole removing tool and a utility pole removing method capable of easily removing utility poles even in a narrow area with a simple configuration.

In order to achieve the above object, the utility pole remover of the present invention is a utility pole remover used in a split removal work in which a utility pole is sequentially cut out from the upper end with a predetermined length, and includes a scaffolding portion fixed to the utility pole and the above. It is characterized by being provided with a height changeable with respect to the scaffolding portion and provided with a guide portion for guiding a wire for suspending a part of the cut-out utility pole.

Further, in addition to the above configuration, the utility pole removing tool of the present invention is characterized in that the guide portion has a support column that can slide in the vertical direction with respect to the scaffolding portion.

Further, in addition to the above configuration, the utility pole removing tool of the present invention is characterized in that the guide portion guides the wire at both ends of an arm portion arranged so as to extend horizontally above the pole.

Further, in addition to the above configuration, the utility pole removing tool of the present invention is characterized in that the arm portion is provided so as to be able to rotate horizontally with respect to the pole.

Further, in addition to the above configuration, the utility pole removing tool of the present invention is characterized in that one end of the arm portion is provided so as to be rotatable in a predetermined rotation region including the direction of the utility pole. ..

Further, in addition to the above configuration, the utility pole removing tool of the present invention is characterized in that the predetermined rotation region is a rotation region of 90 degrees.

Further, the utility pole removal method of the present invention is a utility pole removal method using the utility pole removing tool according to any one of claims 1 to 4 , wherein the upper part of the pole is aligned with the scaffolding portion. The step of arranging the guide portion at a descent position within the movable range with respect to the scaffold portion, and the step of lifting and moving the scaffold portion arranged at the descent position, the guide portion is moved below the planned cutting position of the utility pole. It is characterized by including a step of fixing and a step of lifting the guide portion from the descending position to at least a position higher than the position of the center of gravity of the portion to be cut of the utility pole with respect to the scaffolding portion fixed to the utility pole. To do.

Further, in the utility pole removal method of the present invention, in addition to the above configuration, the step of fixing the scaffolding portion below the planned cutting position of the utility pole is a step of attaching a slide to the tip of the utility pole and hanging. It is characterized by including a step of changing the height positions of the guide portion and the scaffolding portion by using a wire hung on the pulley.

As described above, according to the utility pole removing tool of the present invention, the guide portion is provided so that the height of the guide portion can be changed with respect to the scaffolding portion. The height can be changed to a position suitable for hanging the part.

Further, according to the utility pole removing tool of the present invention, in addition to the above effects, since the guide portion has a pole that can slide in the vertical direction, in addition to facilitating the operation of changing the height. , It becomes possible to intuitively grasp the positional relationship with the work target.

Further, according to the utility pole removing tool of the present invention, in addition to the above effect, the wire is hung on the arm portion extending horizontally above the support column, so that the wire can be prevented from interfering with the support column. This improves work safety.

Further, according to the utility pole removing tool of the present invention, in addition to the above effect, since the arm portion is configured to be horizontally swivel, it is possible to avoid it in the horizontal swivel direction depending on the surrounding conditions.

Further, according to the utility pole removing tool of the present invention, in addition to the above effects, the arm portion is configured to be rotatable within a range including the direction of the utility pole, so that even if an inadvertent operation is performed. , It is possible to prevent the momentum from coming off from the utility pole side.

Further, according to the utility pole removing tool of the present invention, in addition to the above effect, the rotation range is set to 90 degrees, which is a quarter of the circumference, so that the movement of turning can be easily grasped intuitively. Safe operation based on accurate motion prediction is possible.

Further, according to the utility pole removal method of the present invention, since the scaffolding portion is fixed below the planned cutting position of the utility pole, the scaffolding portion can also be used as a scaffolding for a cutting tool or the like. Further, since the guide portion can be lifted above the center of gravity of the portion of the utility pole to be cut, a part of the cut out utility pole can be held at a stable position above the center of gravity.

Further, according to the utility pole removal method of the present invention, in addition to the above effects, the guide portion and the scaffolding portion are lifted by a pulley separately provided at the tip of the utility pole, so that the guide portion is previously set to the descending position with respect to the scaffolding portion. When fixed in the arranged state, only the guide portion can be further lifted. As a result, the upper end of the guide portion can be lifted to a position higher than the tip of the utility pole.

It is an overall perspective view of the utility pole removing tool which concerns on this invention. It is a figure which shows the swing structure of the guide part of the utility pole remover of FIG. It is a figure which shows the sliding structure of the guide part of the utility pole remover of FIG. It is an exploded view of the utility pole removing tool of FIG. It is sectional drawing cut along the line AA of FIG. (Pulley) It is a perspective view of a lifting subsidy. It is a figure which shows the process of the initial installation of the utility pole removal tool in the utility pole removal method. It is a figure which shows the cutting process in the utility pole removal method. It is a figure which shows the process of relocating the utility pole removal tool in the utility pole removal method. It is a figure which shows the conventional utility pole removal method.

Hereinafter, the utility pole removing tool and the utility pole removing method according to the embodiment of the present invention will be described with reference to the drawings.

<About the configuration of utility pole remover>
FIG. 1 is an overall perspective view of the utility pole removing tool 1 according to the present invention.

The utility pole removing tool 1 is composed of a scaffolding portion 2 fixed to the utility pole 100 as a scaffolding, and a guide portion 12 provided so that the height position of the scaffolding portion 2 can be changed. For convenience of explanation, among the configurations of the scaffolding portion 2, the configurations of the utility pole 100 and the belt or chain for winding around the utility pole 100 are schematically represented by dotted lines. Further, with respect to the wire 50 for suspending the cut-out utility pole 100, the path of the wire 50 is schematically represented by a alternate long and short dash line.

The scaffolding portion 2 has a utility pole contact portion 4 in contact with the side surface of the utility pole 100, and two frame portions 6 extending in a substantially horizontal direction from the utility pole contact portion 4. A sliding hole 6a is formed in the frame portion 6 so as to penetrate in the vertical direction.

On the other hand, the guide portion 12 has a support column 14 slidably arranged through the sliding hole 6a of the frame portion 6. In the configuration according to the present embodiment, the columns 14 are arranged at substantially intermediate positions of the arm portions 18 so as to form a T-shape.

Ring-shaped locking portions 8 and 16 are provided on the support columns 14 and the scaffolding portions 2 of the guide portion 12, respectively. By hooking the wire 50 on the locking portions 8 and 16, remote control by the winch 52 (see FIG. 7) becomes possible. In the configuration according to the present embodiment, the pulley 20 is provided to guide the wire 50.

<About the operation of the utility pole remover>
FIG. 2 is a diagram showing a swivel structure of the guide portion 12 of the utility pole removing tool 1 of FIG. Here, one arrangement is shown in an overlapping manner, one is represented by a solid line and the other is represented by a broken line.

In the guide portion 12 of the utility pole remover 1, the arm portion 18 is configured to be rotatable in the horizontal direction with respect to the pole 14. The horizontally swivel range of the arm portion 18 is limited to a predetermined rotation range. In the configuration according to the present embodiment, the arm portion 18 has a rotation range of the same degree in both directions centering on the arrangement in which one end of the arm portion 18 faces the utility pole 100.

In this way, since the arm portion 18 is configured to be horizontally swivelable in the rotation range including the direction of the utility pole 100, a part of the cut out utility pole 100 can be largely rotated away from the remaining utility pole 100. Absent. As a result, the rotation can be regulated before the momentum of the rotation is gained, so that safety is ensured even if an inadvertent operation is performed.

FIG. 3 is a diagram showing a sliding structure of the guide portion 12 of the utility pole removing tool 1 of FIG. The pole 14 of the guide portion 12 of the utility pole remover 1 is configured to be slidable with respect to the sliding hole 6a formed in the scaffolding portion 2.

Thereby, the relative height of the arm portion 18 with respect to the scaffolding portion 2 can be selected and arranged according to the situation. Here, the state of descending the most downward is represented by a broken line, and the state of rising most upward is represented by a solid line.

These predetermined heights are held by pins that are arranged to penetrate the scaffolding portion 2 and the support column 14 in the horizontal direction.

FIG. 4 is an exploded view of the utility pole removing tool 1 of FIG.

The utility pole removing tool 1 is configured such that the arm portion 18 and the pole 14 constituting the guide portion 12 can be separated from each other.

Thereby, it is possible to replace the arm portion 18 with a different shape according to the working environment. For example, it can be replaced with an arm portion 18 having a different length. Further, it is possible to replace the arm portion 18 with a different turning range in the horizontal direction.

Next, a structure for limiting the turning region of the arm portion 18 will be described with reference to FIG.

FIG. 5 is a cross-sectional view taken along the line AA of FIG.

The circular member visible inside is the structure of the lower end of the arm portion 18. The rectangular portion on the outside of the lower end of the arm portion 18 is the structure of the upper end of the support column 14.

As can be seen in FIG. 5, the connection state of both is maintained by the fixing pin 22 penetrating both the arm portion 18 and the support column 14. The through hole 18a on the arm portion 18 side through which the fixing pin 22 penetrates is formed by an elongated hole extending in a horizontal direction.

In this way, the swivel range of the arm portion 18 is limited by the range in which the through hole 18a on the arm portion 18 side is formed. In this embodiment, it is configured to allow 90 degree rotation.

FIG. 6 is a perspective view of the lifting subsidy 30. The lifting subsidy 30 shown here is used to lift the utility pole removing tool 1 (see FIG. 1) on the utility pole 100. Here, for convenience of explanation, the configuration of a fixing member such as a belt or a chain spanning the utility pole 100 is schematically represented by a broken line.

Similar to the scaffolding portion 2 of the utility pole removing tool 1, the utility pole contact portion 32 is also provided on the lifting auxiliary metal fitting 30. It has an L-shaped support portion 34 that bends upward from the utility pole contact portion 32. A pulley 36 having a rotation axis in the horizontal direction is provided at the upper end of the support portion 34.

<About the utility pole removal method>
FIG. 7 is a diagram showing a process of initial installation of the utility pole removing tool 1 in the utility pole removing method.

The utility pole removal method can be roughly divided into a process of cutting the utility pole 100 and a new cutting of the utility pole removing tool 1 after cutting, in addition to the initial installation process of installing the utility pole removing tool 1 on the utility pole 100 as shown in FIG. Divided into steps for relocation to move to position. The latter two steps will be described later with reference to FIGS. 8 and 9. In the description of the construction method using FIGS. 7 to 9, FIG. 1 will be referred to as appropriate for the detailed configuration of the utility pole removing tool 1.

The initial installation process includes three additional steps, as shown below.

FIG. 7A shows a step of lowering the guide portion 12 with respect to the scaffolding portion 2 of the utility pole removing tool 1.

The wire 50 for lifting on the utility pole 100 is operated by a winch 52 installed at the base of the utility pole 100. The wire 50 is connected to the locking portion 16 provided on the scaffolding portion 2 of the utility pole removing tool 1 via the pulley 36 of the lifting auxiliary metal fitting 30 shown in FIG.

As described above, when the guide portion 12 is arranged at the descending position, the center of gravity of the utility pole removing tool 1 can be lowered, so that the lifting state by the scaffolding portion 2 is stable.

FIG. 7B shows a step of fixing the scaffolding portion 2 of the utility pole removing tool 1 suspended above the utility pole 100 to the utility pole 100.

This fixed position is near the lower side of the planned cutting position of the utility pole 100. By fixing the scaffolding portion 2 below the planned cutting position, it can also be used as a scaffolding for a cutting tool.

FIG. 7C shows a step of lifting the guide portion 12 upward with respect to the scaffold portion 2.

At this time, the connection destination of the wire 50 is reconnected from the locking portion 16 of the scaffolding portion 2 to the locking portion 8 provided on the support column 14 of the guide portion 12 (see FIG. 1).

Since the locking portion 8 of the guide portion 12 to be reconnected is provided at a position at a distance from the upper end, as shown in FIG. 7C, the arm portion 18 is moved above the upper end of the utility pole 100. It becomes possible to lift.

As a result, it is possible to hold the upper part of the utility pole 100 to be cut in a stable state.

FIG. 8 is a diagram showing a cutting process in the utility pole removal method.

FIG. 8D shows a step of supporting the upper part of the utility pole 100 to be cut by the fixture 54 and cutting the lower part.

In this way, since the cutting is performed while supporting the upper part, the work can be performed safely.

By the way, in the cutting work, the final stage of cutting is the most unstable state, and caution is required. That is, in the latter half of cutting, the force with which the cutting surface presses the tool gradually increases due to the weight of the utility pole 100 itself. Further, depending on the tool used, a slight uncut portion may occur because a sufficient space cannot be secured in the vicinity of the utility pole 100. In such a case, the cutting is completed by finally hitting and breaking.

In the configuration according to the present embodiment, since the cutting operation is performed while supporting the upper part of the utility pole 100 to be cut by the hanging wire 50, the pressure on the cut surface can be reduced. In addition, it is possible to prevent the product from falling even when the work is broken due to a blow.

FIG. 8E shows a step of lowering a part of the cut utility pole 100 by operating the winch 52.

In this step, as shown in FIG. 2, since the arm portion 18 of the utility pole removing tool 1 is configured to be horizontally swivel with respect to the pole 14, it is safe while avoiding surrounding devices and obstacles by swiveling operation. It is possible to descend to.

FIG. 9 is a diagram showing a process of relocating the utility pole removing tool 1 in the utility pole removing method.

FIG. 9 (f) shows a step of lowering the guide portion 12 of the utility pole removing tool 1 that has completed cutting with respect to the scaffolding portion 2.

As a result, the center of gravity can be lowered as in the step of FIG. 7A, so that the product can be moved in a stable state.

FIG. 9 (g) shows a step of connecting the wire 50 to the utility pole removing tool 1.

After the lifting auxiliary metal fitting 30 shown in FIG. 6 is attached to the upper end of the remaining utility pole 100, the wire 50 is connected to the locking portion 16 of the scaffolding portion 2 via the lifting auxiliary metal fitting 30. In this way, the suspension work is prepared.

Since the lifting subsidy 30 is constructed to be simple and lightweight, it is easy for an operator to climb up to the utility pole 100 and install it even in a narrow place where a bucket car or the like cannot be introduced.

FIG. 9H shows a step of relocating the utility pole removing tool 1 to a new cutting position using the winch 52.

The cutting position is determined based on the same criteria as in the step of FIG. 7 (b).

Even in this relocation process, since the arm portion 18 can rotate horizontally with respect to the support pole 14, the work can be safely performed by avoiding obstacles on the utility pole 100 and the like.

FIG. 9 (i) shows a step of lifting the guide portion 12 with respect to the scaffolding portion 2.

The step of lifting the guide portion 12 after this relocation is the same as the step shown in FIG. 7 (c).

Since the wire 50 is reconnected to the locking portion 8 provided on the support pole 14 below the arm portion 18 and lifted, the arm portion 18 can be lifted above the utility pole 100.

After that, by repeating the steps of FIGS. 8 (d) to 9 (i), utility poles 100 having a predetermined length are sequentially cut out.

The configuration as described above is an example of the present invention, and includes the following modified examples.

In the above embodiment, a configuration in which the support column 14 of the guide portion 12 is slidably provided in the vertical direction with respect to the sliding hole 6a formed in the scaffolding portion 2 is shown as an example. However, such a sliding mechanism may not be used as long as the height can be changed with respect to the scaffolding portion 2. For example, the arm portion 18 may be lowered downward by bending the support column at an intermediate position.

Further, in the above-described embodiment, a configuration in which pulleys 20 are provided at both ends of the arm portion 18 is shown as an example. However, if a rope is used in addition to the wire 50, a simple configuration such as a guide groove may be used.

Further, in the above embodiment, a configuration in which the extension direction of the support column 14 is formed in a T shape intersecting with substantially the center of the arm portion 18 is shown as an example. However, as long as the structure extends to both sides of the support column 14, the support column 14 may be arranged at a position off the center of the arm portion 18.

Further, in the above embodiment, a configuration in which a predetermined rotation region of the arm portion 18 is limited to a range of ± 45 degrees centered on the direction of the utility pole 100 is shown as an example. However, at least, as long as the direction toward the utility pole 100 is included, the swing width may not be evenly 45 degrees. For example, it may be a rotation range of 90 degrees from the direction of the utility pole 100 to any one side. Further, the configuration may be rotatable over the entire circumference.

The utility pole removal tool and utility pole removal method of the present invention can easily remove utility poles with a small number of workers even in a narrow area. Therefore, similarly, in the work of removing structures such as chimneys and steel towers. It is useful.

1 Utility pole remover 2 Scaffolding part 4 Utility pole contact part 6 Frame part 6a Sliding hole 8 Locking part 12 Guide part 14 Support 16 Locking part 18 Arm part 18a Through hole 20 Pulley 22 Fixing pin 30 Lifting auxiliary metal fitting 32 Electric pole Contact 34 Support 36 Pulley 50 Wire 52 Winch 100 Utility pole

Claims (6)

It is a utility pole remover used in the split removal work that sequentially cuts out utility poles from the upper end with a predetermined length.
The scaffolding part fixed to the utility pole and
It is provided with a height-changeable height with respect to the scaffolding portion, and is provided with a guide portion for guiding a wire for suspending a part of the cut-out utility pole .
The guide portion has a strut that can slide in the vertical direction with respect to the scaffold portion, and guides the wire at both ends of an arm portion that is arranged so as to extend horizontally above the strut. Electric pole removal tool. The utility pole removing tool according to claim 1 , wherein the arm portion is provided so as to be able to rotate horizontally with respect to the pole. The utility pole removing tool according to claim 2 , wherein the arm portion is provided so that one end thereof can be swiveled in a predetermined rotation region including the direction of the utility pole. The utility pole removing tool according to claim 3 , wherein the predetermined rotation region is a rotation region of 90 degrees. A utility pole removal method using the utility pole removing tool according to any one of claims 1 to 4.
A step of arranging the guide portion at a descending position within the movable range with respect to the scaffold portion by aligning the upper part of the support column with the scaffold portion.
A step of lifting and moving the scaffolding portion arranged at the descending position by the guide portion and fixing the scaffolding portion below the planned cutting position of the utility pole.
A utility pole removal method comprising a step of lifting the guide portion from the descending position to at least a position higher than the position of the center of gravity of the portion to be cut of the utility pole with respect to the scaffolding portion fixed to the utility pole. The step of fixing the scaffolding portion below the planned cutting position of the utility pole is
The process of attaching a pulley to the tip of the utility pole,
The utility pole removal method according to claim 5 , further comprising a step of changing the height positions of the suspended guide portion and the scaffolding portion by using a wire hung on the pulley.

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