JP3717911B2 - Steel tower dismantling method and work jig by helicopter - Google Patents

Description

  The present invention relates to a steel tower dismantling method using a helicopter for dismantling a steel tower on which a transmission line is installed, and a work jig.

Conventionally, the dismantling of steel towers with power transmission lines has secured work space around the installation site, and also constructed temporary work roads to nearby roads in mountainous areas and constructed with large cranes, etc. It is carried out. The steel tower dismantling operation is such that the components of the steel tower are lifted by a crane in order from the top, the bolts and nuts are removed, and the steel tower is disassembled in order from the top.
JP-A-9-137633 JP 2001-37030 A

  The conventional steel tower dismantling method requires a large work space around the steel tower and the nearby road, requires a large period of preparation for work and large heavy machinery such as cranes, and also secures land. In addition, the cost of the entire process is enormous, and the dismantling work itself takes time.

  The present invention has been made in view of the above-described conventional problems, and includes a tower dismantling method and work jig using a helicopter that can efficiently and safely disassemble a tower in a short period of time. The purpose is to provide.

The present invention is removably held upward at the upper part of the steel tower component of the existing steel tower , and is provided so as to be engageable by the helicopter from above by a hook provided on the helicopter. An annular member for suspending the steel tower constituent member is attached, and the connection between the part transported by the helicopter and the remaining part of the existing steel tower constituent member is released, and the temporary connection of this part is connected to the connecting jig and this The connecting jig is held by a holding member that holds the steel tower component, the holding member can be released on the ground side, the helicopter is positioned above the annular member, and the hook is engaged with the annular member. after the state down becomes possible hanging, and releasing the holding member on the ground side, removing the connecting jig of the tower structure member from the pylon component , The tower structure member coupled to said annular member is a steel tower disassembling method according to the helicopter for transporting hanging by the helicopter.

Furthermore, when dismantling the steel tower component of the existing steel tower, it is attached to at least one of the part transported by the helicopter and the remaining part of the steel tower constituent member, and is constituted by a male screw member and a nut member and transported by dismantling A support member that slightly lifts the steel tower constituent member of the portion to be lowered relative to the steel tower constituent member below it, and lifts the steel tower constituent member conveyed by the rotation of the nut member, and then dismantles It is a steel tower dismantling method by a helicopter that releases the connection between the transporting part and the remaining part .

Further, the annular member is positioned in a vertical state with respect to the existing steel tower component member, and a positioning member is provided to hold the helicopter so as to be engageable with the hook of the helicopter, and the annular member held by the positioning member is provided in the helicopter. The steel tower constituting member engaged and disassembled by the hook is suspended by the helicopter via a connecting member and conveyed .

In addition, when disassembling a steel tower component of an existing steel tower, the present invention is attached to at least one of a part transported by the helicopter and a remaining part of the steel tower constituent member, and is constituted by a male screw member and a nut member, The existing steel tower after releasing the connection between the support member for slightly lifting the steel tower constituent member of the part conveyed by dismantling with respect to the steel tower constituent member below it and the part conveyed by the helicopter and the remaining part A connecting jig for temporarily maintaining the connection between the part transported by the helicopter and the remaining part of the constituent members, and the connecting jig is a shaft member inserted into the part transported by the helicopter and the remaining part And the elasticity that removes the shaft member of the connecting jig from the tower component in a state where the tower member is supported by the support member. A holding member that holds the shaft member against the urging force of the elastic member against the urging force of the elastic member, and the holding member is removed from the ground and the connecting jig is connected to the steel tower by the elastic member. It is a steel tower dismantling work jig by a helicopter provided with a removing member for removing from a constituent member .

  The steel tower dismantling method and work jig by the helicopter of the present invention can be dismantled while minimizing the work space at the steel tower installation site, does not require heavy machinery such as a large crane, and the steel tower dismantling work can be done quickly. It can be carried out. Therefore, it is possible to work at a low cost without requiring a cost and a preparation period for securing a work space as in the prior art. Moreover, the work jig used in the steel tower disassembly method using the helicopter according to the present invention can perform the work reliably and quickly and can safely perform the dismantling work.

  Hereinafter, a steel tower dismantling method and work jig using a helicopter according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, the existing steel tower 10 is disassembled. First, as shown in FIG. 1, after removing the electric wires installed on the steel tower 10, an annular member 20 that is a circular metal ring is temporarily installed on the top 10 a of the steel tower 10. As shown in FIGS. 11 and 12, the annular member 20 is held by a positioning member 22 that holds both sides thereof and is positioned in a vertical state. As shown in FIGS. 1 to 4, the positions of the annular member 20 and the positioning member 22 are attached to the top 10 a of the steel tower 10 or the steel tower component 26 in the middle of the existing steel tower 10.

  For example, as shown in FIG. 13, the wire 30 that is a connecting member that connects the annular member 20 and the steel tower component 26 to be disassembled is connected to the annular member 20 by a metal ring 32, and the other end of the wire 30 is also disassembled. It is connected to the steel tower component 26 by a metal ring 32. The standing portions 23 on both sides of the positioning member 22 face each other with a width slightly wider than the thickness of the annular member 20, and sandwich the annular member 20 between both sides. The positioning member 22 is provided with a fixing bracket 24 to be fixed to the steel tower constituent member 26 at the lower part, and is fixed to the steel tower constituent member 26 with a bolt 25.

  The disengagement between the dismantled part of the steel tower 10 and the remaining part is performed using a support member 34 that is a jig for facilitating removal of the bolt connecting the steel tower constituting member 26. The support member 34 is attached to at least one of the portion transported by the helicopter 40 and the remaining steel tower component member 26. In this embodiment, the remaining portion of the steel tower component 26 is fixed with bolts and nuts (not shown). As shown in FIGS. 6 and 7, the support member 34 includes a support portion 35 having an L-shaped cross section, a male screw member 36 to which a tip of one side surface of the support portion 35 is fixed, and the male screw member 36. It comprises a screwed nut member 37 and a receiving portion 39 for receiving the nut member 37. A through hole is formed in the receiving part 39, and the male screw member 36 is inserted coaxially with the through hole, and is provided with an insertion support part 41 that guides stably. An attachment hole for fixing to the steel tower component 26 is formed on a side surface of the receiving portion 39 that is perpendicular to the side surface on which the insertion support portion 41 is provided. As shown in FIGS. 1, 8, etc., the steel tower component 26 is firmly fixed to the side surface of the steel tower component 26 with bolts and nuts (not shown).

  A connecting member between the steel tower component 26 on the side transported by the helicopter 40 and the steel tower component 26 of the lower main pillar 11 connected thereto is supported on the lower end surface 26a of the steel tower component 26 on the transport side. The support portion 35 of 34 is brought into contact, and the male screw member 36 is raised by the rotation of the nut member 37, and the lower end surface 26 a is slightly pushed up by the support portion 35. Thereby, it becomes easy to remove the bolt 42 connecting the steel tower component members 26. About the four main pillar materials 11, the tower member 26 is pushed up with the nut member 37 in order, and the volt | bolt 42 is removed.

  After the bolt 42 is removed, as shown in FIGS. 9 and 10, the shaft member 52 of the connecting jig 50 is inserted into the bolt insertion hole, and the pin 54 that is a holding member is attached to the distal end portion of the shaft member 52. Lock to prevent it from coming off. In the connecting jig 50, a shaft member 52 is inserted into a cylindrical exterior member 56, and a handle 58 is attached to the base end portion of the shaft member 52 in a T shape. The long hole 60 is formed facing each other. A coil spring 62, which is an elastic member, is inserted into the exterior member 56, and urges the shaft member 52 in the storage direction.

  With the helicopter of this embodiment, the steel tower dismantling method fixes the positioning member 22 to the top portion 10a of the steel tower 10 and a predetermined position of the steel tower 10. Then, the annular member 20 is inserted into the positioning member 22, the four wires 30 are extended from the annular member 20, and the lower ends of the four wires 30 are respectively connected above the center of gravity of the steel tower component 26 that is lifted and conveyed. To do.

  And the supporting member 34 is attached and fixed to each side surface of the four main pillar materials 11, and the part which the steel tower 10 conveys is slightly lifted by turning the nut member 37. Then, all the bolts 42 are removed in order with respect to the main pillar material 11, and the shaft member 52 of the connecting jig 50 is against one side of the removed through holes against the urging force of the coil spring 62 by the handle 58. And a pin 54 is inserted into the tip of the shaft member 52 to prevent it from coming off. This operation is sequentially performed on the four main pillar members 11.

When the removal of the bolts 42 and the attachment of the connecting jig 50 are finished for the four main pillars 11, the helicopter 40 is positioned above the steel tower 10, and the annular member 20 is engaged with the hooks 44. If the engagement is ensured, the helicopter 40 starts to rise, and the helicopter 40 contacts the worker on the ground. A string 64 as a removing member is tied to the pin 54, and the pin 54 is formed so as to fall off the shaft member 52 when pulled from below. Then, as shown in FIG. 2, in response to the communication from the helicopter 40, the string 64 is pulled on the ground, and the pin 54 is pulled out from the shaft member 52. Then, due to the urging force of the coil spring 62, the shaft member 52 is retracted into the exterior member 56, and falls off from the steel tower constituting member 26 of the main pillar 11. Since the connecting jig 50 is connected to the support member 34 by the string 66, it does not fall to the ground.

  In this state, the steel tower constituting member 26 on the transport side only has its lower end surface 26a resting on the support portion 35 of the support member 34, but since it is suspended by the helicopter 40, the helicopter 40 Ascended, it is lifted in the air. As shown in FIG. 3, the lifted steel tower component 26 is transported to a predetermined place by the helicopter 40 as it is.

  Further, similarly, as shown in FIGS. 4 and 5, the hook 44 of the helicopter 40 is engaged with the annular member 20 by the positioning member 22 and the annular member 20 attached to the next conveyance portion, and is suspended by the helicopter 40. Carry it down.

  According to the steel tower dismantling method of this embodiment, it is not necessary to take many places around the existing steel tower 10, and the dismantling cost can be significantly reduced. Moreover, the dismantling of the tower 10 can be performed safely and efficiently by using dismantling jigs such as the annular member 20, the positioning member 22, the support member 34, and the connecting jig 50.

  Note that the steel tower dismantling method and work jig by the helicopter of the present invention are not limited to the above embodiment, and the annular member, the support member, and the connecting jig can be appropriately set in shape, and the holding member Also, members other than pins may be used.

It is the schematic which shows 1 process of the steel tower dismantling method by the helicopter of one Embodiment of this invention. It is the schematic which shows the next process of the tower demolition method by the helicopter of one Embodiment of this invention. It is the schematic which shows the next process of the tower demolition method by the helicopter of one Embodiment of this invention. It is the schematic which shows the next process of the tower demolition method by the helicopter of one Embodiment of this invention. It is the schematic which shows the next process of the tower demolition method by the helicopter of one Embodiment of this invention. It is a front view which shows the support member used for the steel tower dismantling method by the helicopter of one Embodiment of this invention. It is the front view (A) and side view (B) of the support member of one Embodiment of this invention. It is a partial front view of the state which attached the support member and connecting jig of one Embodiment of this invention to the main pillar material. It is the schematic (A)-(D) which shows the structure of the connection jig | tool of one Embodiment of this invention. It is the schematic (A) and (B) which show the operation | movement of the connection jig | tool of one Embodiment of this invention. It is a front view of the positioning member used for the steel tower assembly method by the helicopter of one Embodiment of this invention. It is a front view of the state which attached the annular member to the positioning member of one Embodiment of this invention. It is a front view of the annular member of one embodiment of this invention.

Explanation of symbols

10 steel tower 20 annular member 22 positioning member 26 steel tower constituting member 30 wire 34 support member 40 helicopter 44 hook 50 connecting jig 52 shaft member 54 pin 64 string

Claims (4)

At the top of the steel tower component of the existing steel tower, it is detachably held upward, and is provided so as to be engageable by the helicopter from above by a hook provided on the helicopter. An annular member for suspending is attached, the annular member and the steel tower constituent member are connected by a connecting member so that the steel tower constituent member can be suspended from the annular member, and is transported by the helicopter among the existing steel tower constituent members. The connection between the part and the remaining part is released, and this part is temporarily connected with a connecting jig and a holding member that holds the connecting jig on the steel tower component, and the holding member is released on the ground side. It is possible to suspend the helicopter by positioning the helicopter above the annular member and engaging the hook with the annular member. After the state, the holding member is released on the ground side, the connecting jig of the steel tower constituent member is removed from the steel tower constituent member, and the steel tower constituent member connected to the annular member is suspended and transported by the helicopter A method for dismantling a steel tower using a helicopter.   When dismantling the steel tower component of the existing steel tower, it is attached to at least one of the part transported by the helicopter and the remaining part of the steel tower constituent member, is constituted by a male screw member and a nut member, and is transported by dismantling A support member that slightly lifts the steel tower constituent member of the part relative to the steel tower constituent member below is provided, and the steel tower constituent member that is conveyed by the rotation of the nut member is slightly lifted and then disassembled and conveyed. The method of disassembling a tower using a helicopter according to claim 1, wherein the connection between the portion and the remaining portion is released.   The annular member is positioned in a vertical state with respect to the existing steel tower constituent member, and a positioning member is provided to hold the helicopter so as to be engageable with the hook of the helicopter, and the annular member held by the positioning member is attached to the helicopter hook. The tower dismantling method by a helicopter according to claim 1, wherein the steel tower constituting member engaged and disassembled is suspended and conveyed by the helicopter via the connecting member. When dismantling the steel tower component of the existing steel tower, it is attached to at least one of the part transported by the helicopter and the remaining part of the steel tower constituent member, is constituted by a male screw member and a nut member, and is transported by dismantling The support member that slightly lifts the steel tower constituent member of the part relative to the steel tower constituent member below it, and the connection between the part transported by the helicopter and the remaining part, and then the above-described existing steel tower constituent member A connection jig for temporarily maintaining the connection between the portion transported by the helicopter and the remaining portion; the connection jig is connected to the support member by a string; and the connection jig is transported by the helicopter In the state in which the tower member is supported by the shaft member inserted into the part and the remaining part, and the support member, the connection And a holding member for holding the shaft member against the biasing force of the elastic member and removing the holding member from the ground. A steel tower dismantling work jig using a helicopter, comprising a removal member for removing the connecting jig from the steel tower constituting member by the elastic member.

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