JP2005248585A - Temporary arm and assembling method of crossarm in power transmission line steel tower using the temporary arm - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temporary arm and an assembling method of a crossarm in a power transmission line steel tower using this temporary arm, for facilitating assembling work of the crossarm for supporting a power transmission line of the power transmission line steel tower. <P>SOLUTION: A base member 2 is connected to a top part of a steel tower body A; a field assembling member 3 is connected on the base member 2; and the temporary arm 1 is assembled in the top part of the steel tower body A by projecting an arm member 4 in the horizontal direction in both side upper parts of the field assembling member 3. Next, the tip is fixed to a fixing plate 8a of the temporary arm 1, and a suspension wire 6 movably attached with a moving pulley 9 removably connected with the crossarm 5a, is respectively extended to a fixed pulley 7 arranged on the fixing plate 8a and a relay pulley 10 arranged in a connecting part of the arm member 4 and the field assembling member 3. The crossarm 5a is suspended by towing the other end of the suspension wire 6 on the ground, and is fixed to a predetermined part of a steel tower body A side part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a temporary arm for assembling a brace for supporting a power transmission line so as to project on both sides of a steel tower, and a method for assembling a brace in a power transmission line tower using the temporary arm.

As a conventional assembling method of the above-mentioned arm metal, there is a climbing derrick method of lifting an arm metal using a derrick device on the top of a steel tower. The derrick device is supported by a front leg, a rear leg, and a wire, and is provided with a pulley at the tip of a boom (support bar) that protrudes obliquely outward from the outer frame of the top of the steel tower. A lifting wire connected to the winch is hung, and a brace is suspended from the other end of the wire so as to be raised and lowered.
JP-A-10-102823

  The climbing derrick method has a problem that the boom is weak mechanically because the boom supports the lifting load by a so-called branch line (one bar-like one), and the lifting load is limited. In particular, in recent years, in order to carry out construction at low cost, a means for assembling a heavy metal arm (see FIG. 1) that integrates an upper arm and a ground arm for supporting a transmission line into a steel tower is adopted. Although it increased, there existed a problem that the climbing derrick construction method with the said weight restrictions cannot be used in the construction which handles such a heavy-weight arm. This invention makes it a subject to eliminate the said problem, and it aims at providing the assembly method of the arm in the transmission line tower using the temporary arm which solved this subject, and this temporary arm.

  In order to achieve the above-mentioned object, the temporary arm according to claim 1 is a base member connected to the top of the steel tower, a frame member having a polygonal column shape, and a ground member connected to the base member. A pair of arm members that are connected to the upper and lower sides of the ground member so that their tips extend in the horizontal direction and in opposite directions, and are provided at the bottom of the arm member to suspend the arm metal. And a fixed plate on which a fixed pulley on which the hanging wire is hung can be attached.

  Moreover, the temporary arm of Claim 2 comprises the temporary arm of Claim 1 by angle steel materials.

  Furthermore, the assembling method of the arm bracket in the transmission line tower using the temporary arm according to claim 3 is an assembling method of the arm bracket in the transmission line tower using the temporary arm according to claim 1 or claim 2. A base member provided at the tip of a pulley with a pulley on which a suspension wire can be movably mounted is fixed near the top of the tower main body so that the pulley is located above the top of the tower, and a base member connected to the tip of the suspension wire is provided. , Lifting by pulling the other end of the suspension wire, connected to the top of the tower, and in the same manner as in the case of the base member, the ground member is lifted, connected to the base member, and further, In the same manner as in the case of the base member and the ground member, each arm member is lifted sequentially, and the temporary arm is assembled to the top of the steel tower main body by projecting in the horizontal direction on both sides of the ground member. One end of the suspension wire is fixed to the fixed plate of the installation arm, and the suspension wire, to which the movable pulley to which the arm metal is detachably connected, is movably attached, the fixed pulley provided on the fixed plate, the arm member, and the ground assembly The armature is lifted by pulling the other end of the suspension wire on the ground, and is fixed to a predetermined portion on the side of the tower main body, over the relay pulley provided at the connection portion with the member. .

  The temporary arm of the present invention according to claim 1 is three-dimensionally configured unlike a single bar-shaped branch line as in the prior art, so that it can be used for lifting a heavy metal arm, Since it is divided into four blocks of a base member, a ground member, and two arm members and then sequentially lifted and assembled on the top of the tower main body, the assembly work and the dismantling work on the tower main body top are easy.

  Since the temporary arm of the present invention described in claim 2 is made of an angle steel material in addition to the effect of the invention described in claim 1, it is slim in the disassembled state, and is easy to transport and store. Play.

  Since the assembling method of the arm bracket in the power transmission line tower using the temporary arm of the present invention according to claim 3 uses the temporary arm of the invention according to claim 1 or 2, assembly of a heavy metal arm It is possible to perform in an easy and stable state.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. Here, FIG. 1 is a front view of a temporary arm showing a state in which a brace is being lifted, FIG. 2 is a front view of a ground member, FIG. 3 is a partially enlarged front view of a base member, and FIG. FIG. 5 is a partially enlarged front view of the ground member, FIG. 6 is a sectional view taken along the line DD of FIG. 5, FIG. 7 is a front view showing a connection state of the base member and the ground member, and FIG. FIG. 9 is a bottom view of the arm member, FIG. 10 is a sectional view taken along line AA in FIG. 9, FIG. 11 is a sectional view taken along line BB in FIG. 9, and FIG. FIG. 13 to FIG. 15 are front views of a transmission line tower showing a procedure for assembling a temporary arm, and FIGS. 16 to 19 are front views of a transmission line tower showing a procedure for assembling a brace using a temporary arm. is there.

  As shown in FIGS. 1 to 12, the temporary arm 1 is a base member 2 connected to the top of the steel tower A and a rectangular parallelepiped frame having a vertically long polygonal shape, and is placed on the base member 2. A pair of ground members 3 to be connected to each other and a quadrangular pyramid-shaped frame body each having a polygonal pyramid shape. The pair of ground members 3 are connected to both upper sides of the ground member 3 so that their tips extend in the horizontal direction and in opposite directions. The arm member 4 is provided at the bottom of the arm member 4, and the tip of the suspension wire 6 for hanging the arm metal 5 a can be attached, and the first semi-metal wheel 7 which is a fixed pulley for hanging the suspension wire 6 can be attached. The fixed plates 8a, 8b, and 8c.

  The suspension wire 6 is attached to the lower side of the second semi-metal wheel 9 which is a movable pulley which is attached to the fixed plate 8a at the time of a suspension operation which will be described later and which is adapted to suspend the arm brackets 5a and 5b. After that, it is hung on the upper side of the first semi-metal wheel 9, and is further hung on the flywheel 10 which is a relay pulley provided on the ground member 3 in the vicinity of the connecting portion with each arm member 4.

  As shown in FIGS. 1 to 4 and 7, the base member 2 is composed of four support members 12 fixed to the vertical frames 11 at the four corners of the top of the steel tower A. Each support member 12 has a connection auxiliary plate 13 welded to the upper end of an angle steel material 12a having a predetermined length, and screw holes 14 (only one surface is shown) on two surfaces of the angle steel material 12a. The holes 14 are configured so as to be aligned with the screw holes 15 provided in the vertical frame 11 at the top of the steel tower A, and screws are inserted and tightened and fixed. The auxiliary connecting plate 13 projects two reinforcing pieces 16 in a direction perpendicular to the surface of the auxiliary connecting plate 13 by abutting each edge so that the edges are close to each other and forming a predetermined angle with each other. Four screw holes 17 are provided. In the welding, the end face of the support member 12, the surface of the auxiliary connecting plate 13, the abutting portion of the reinforcing piece 16, and the outer edge portion of the angle steel member 12a of the support member 11 are provided. Are welded in contact with each other. In addition, the code | symbol 18 in a figure shows the welding part of each said edge part and the said angle 12a outer edge part.

  As shown in FIGS. 2 and 5 to 7, the ground member 3 includes four outer frames 19 corresponding to the sides of the rectangular parallelepiped shape and extending in the longitudinal direction of the ground member 3, and these outer frames 19. It is formed by a reinforcing material 20 that mechanically reinforces. Further, a connection auxiliary plate 21 substantially the same as the connection auxiliary plate 13 of the base member 2 is welded to the lower end of the outer frame 19. The auxiliary connecting plate 21 has two reinforcing pieces 22 projecting in a direction perpendicular to the surface of the auxiliary connecting plate 21 by abutting each other so that each edge is close to each other and at a predetermined angle. In this welding, the end face of the vertical frame 19, the surface of the auxiliary connecting plate 21, the abutting portion of the reinforcing piece 22, and the outer edge portion of the outer frame 19 are respectively contacted. It is in contact and welded. Further, the ground member 3 is provided with a fixing hole 10b for fixing a connecting bar 10a having a second semi-metal wheel 10 serving as a relay pulley at the tip in the vicinity of a portion connected to the arm member 4. In addition, the code | symbol 24 in a figure shows the welding part of each said edge part and the said angle outer edge part.

  As shown in FIGS. 2 and 7, in order to connect the ground member 3 to the base member 2, the ground member 3 side is connected to the outer surface (upper side surface in FIG. 7) of the auxiliary connecting plate 13 on the base member 2 side. The grounding member 3 is placed on the base member 2 so that the outer surface of the connection auxiliary plate 21 (the lower surface in FIG. 7) overlaps, and the screw hole 17 of the connection auxiliary plate 13 and the screw of the connection auxiliary plate 21 are placed. The long slot 23 is set in a corresponding position, and a screw 25 is inserted and tightened.

  As shown in FIGS. 8-12, each arm member 4 connects each front-end | tip of a pair of angle steel materials with predetermined length, and the said angle steel materials gradually spread by a predetermined angle from this connection part. The upper outer frame 26a and the lower outer frame 26b formed as described above, and the reinforcing material 27a, which is formed of an angle steel material, connecting the outer frame 27a and the lower outer frame 26b so as to have a substantially quadrangular pyramid shape. 27b, 27c, 27d. The upper outer frame 26a and the lower outer frame 26b extend obliquely from the pair of angle steel members, respectively, and are connected to the connecting plate 29 at a central position, and the front ends of the reinforcing members 28a and 28b. In the same manner as described above, reinforcing members 28c and 28d that extend obliquely from the pair of angle steel members and are connected to the connecting plate 30 at a central position, and reinforcing members 31a and 31b that connect the pair of angle steel members, respectively. Configure (see FIG. 9).

  As shown in FIG. 8, FIG. 9 and FIG. 11, the respective leading end portions of the upper outer frame 26a and the lower outer frame 26b constitute the upper outer frame 26a and the lower outer frame 26b, respectively. The tip of each angle steel material is connected to the fixing plate 8a by fixing it with screws. The lower outer frame 26b is connected to the connecting plates 29 and 30 at both ends, connected to the reinforcing members 31a and 31b, and sandwiched with the fixing plate 7b so as to project downward. A fixed frame 32, and a plate fixing frame 32 for connecting both ends to the connecting plate 30 and the reinforcing member 31b and projecting downward with the fixing plate 7c interposed therebetween are provided.

  As shown in FIGS. 1 and 8, each of the fixing plates 8a, 8b, 8c has a fixing hole 34a for fixing the tip of the suspension wire and a fixing for attaching the first semi-metal wheel 7 as a fixed pulley. A hole 34b is provided. A connecting fitting 35 provided at the tip of the suspension wire 6 is connected to the fixed hole 34a, and a tip of a connecting bar 7a having a rotating shaft of the first semi-metal wheel 7 serving as a fixed pulley is connected to the fixed hole 34b. Thus, in order to provide the fixing plates 8a, 8b and 8c at the three positions on the bottom of the arm member 4, the position where the arm brackets 5a and 5b are suspended is changed in the horizontal direction according to the size and type of the arm metal 5a and 5b. It is to do.

  As shown in FIGS. 2, 8, and 9, each arm member 4 configured as described above includes the base portions of the upper outer frame 26a and the lower outer frame 26b, and the reinforcing members 28a and 28b. The base end connected to the connection plate 29 is connected to the upper both sides of the ground member 3 and assembled.

  As shown in FIG. 1 and FIGS. 16 to 19, the arm 5 a is assembled so as to protrude horizontally on both sides of the upper part of the tower main body A, and has an underline arm, an upper line arm longer than the underline arm, Are combined. Further, as shown in FIGS. 17 to 19, the arm metal 5b has substantially the same structure as the underlined arm of the arm metal 5a, and is horizontally disposed on both sides of the tower body A on the lower side of the pair of arm metal 5a. It is assembled so as to protrude in the direction. Since the arm metal 5a can support the power transmission line on both the upper arm and the lower arm, the arm metal 5a can support a larger number of power transmission lines than the arm metal 5b. And since the arm metal fitting 5a combines the underline arm and the overline arm in this way, the weight of the arm bracket 5a is almost twice that of the arm metal 5b.

  Next, an assembling process of the arm brackets 5a and 5b to the tower main body A will be described.

  (Working Step 1) As shown in FIG. 13, a pedestal 36 having a tip of a gold wheel 36a, which is a pulley that can hang a suspension wire 6 movably, is provided near the top of the steel tower body A, and the gold wheel 36a is a steel tower. A base member 2 (consisting of four support members 12) is connected to the tip of a suspension wire 6 that is fixed above the top of the main body A, and spans the gold wheel 36 a, and the suspension extends through a relay pulley 37. The wire member 6 is wound and pulled by the assembly winch 38 to lift the platform member 2 and connect it to the top of the tower main body A. The lifting work is performed while appropriately pulling in the lateral direction with the interposition rope 39 so as to separate the base member 2 from the tower body A so as not to collide with the tower body A. In each subsequent lifting operation, the above-described operation of pulling the lifted member in the lateral direction using this intervening rope 39 is performed.

  (Working Step 2) As shown in FIGS. 2, 7, and 13, the ground member 3 is lifted and connected to the base member 2 in the same manner as the base member 2.

  (Working Step 3) As shown in FIGS. 2, 14, and 15, each arm member 4 is lifted sequentially in the same manner as in the case of the grounding member 3, and horizontally on each side upper part of the grounding member 3. And are connected so as to protrude in opposite directions. Thus, the temporary arm 1 assembled on the top of the steel tower body A is robust because the ground member 3 and the arm member 4 are three-dimensionally configured, and can support a large load.

(Working Step 4) As shown in FIGS. 1 and 16, the connecting fitting 35 at the tip of the suspension wire 6 is fixed to the fixing hole 34a of the fixing plate 8a located at the tip of one arm member 4 of the temporary arm 1. A first semi-metal wheel 7 in which a suspension wire 6 hung over a second semi-metal wheel 9 which is a movable pulley connected to a metal arm 5a in a separable manner is attached to the fixing hole 34b of the fixing plate 8a, and the arm member 4 The armature 5a is lifted by being hung around the flywheel 10 as a relay pulley provided in the vicinity of the connecting portion between the grounding member 3 and the grounding member 3, and pulled by the assembly winch 38 which is a predetermined pulling device on the ground. The arm 5a is fixed to the upper part of the steel tower body A. In addition, the code | symbol 40 is a relay pulley arrange | positioned in the steel tower main body A lower part.

(Working process 5) The assembly winch 38 is stopped, the second semi-metal wheel 9 is removed from the arm metal 5a, and this is lowered to the ground.

  (Working Step 6) As shown in FIG. 17, the armature 5b is connected to the second semi-metal wheel 9 as the movable pulley, and the tower main body at the lower position of the arming metal 5a is connected in the same manner as the above-mentioned working step 3. Two arm brackets 5b are sequentially lifted and assembled on the side A.

  (Working Step 7) As shown in FIGS. 18 and 19, the tip of the suspension wire 6a is replaced with the fixing plate 8a of the arm member 4 on the opposite side of the temporary arm 1, and the above-described working step 3 and working step 4 are performed. In the same manner as described above, the arm metal 5a and the two arm metals 5b are sequentially assembled.

  (Working step 8) After all the assembling work of the arm brackets 5a, 5b is completed, the arm member 4 is moved by the work of the temporary arm 1 opposite to the assembling procedure of the above-mentioned steps 1-2, that is, the base bar 36. After the ground member 3 and the base member 2 are sequentially disassembled and removed, the base bar 36 is removed.

  The present invention is not limited to the above embodiment. For example, the number of the fixing plates 8a, 8b, 8c is not three as described above, but is one, two, or four or more. May be.

The front view of the temporary arm which shows the state which has lifted the brace. The front view of a ground member. The partial enlarged front view of a base member. CC sectional view taken on the line of FIG. The partial enlarged front view of a ground member. The DD sectional view taken on the line of FIG. The front view which shows the connection state of a base member and a groundwork member. The front view of an arm member. The bottom view of an arm member. FIG. 10 is a cross-sectional view taken along line AA in FIG. 9. BB sectional drawing of FIG. CC sectional view taken on the line C-C in FIG. 9. The front view of the power transmission line tower which shows the assembly procedure of a temporary arm. The front view of the power transmission line tower which shows the assembly procedure of a temporary arm. The front view of the power transmission line tower which shows the assembly procedure of a temporary arm. The front view of the power transmission line tower which shows the assembly procedure of the brace using a temporary arm. The front view of the power transmission line tower which shows the assembly procedure of the brace using a temporary arm. The front view of the power transmission line tower which shows the assembly procedure of the brace using a temporary arm. The front view of the power transmission line tower which shows the assembly procedure of the brace using a temporary arm.

Explanation of symbols

A Steel tower body 1 Temporary arm 2 Base member 3 Ground member 4 Arm member 5a Arm metal 5b Arm metal 6 Suspension wire 7 First semi-metal wheel 8a. 8b, 8c Fixed plate 9 Second semi-metal wheel 10 Flying wheel 11 Vertical frame 12 Support material 12a Angle steel material 13 Connection auxiliary plate 14 Screw hole 15 Screw hole 16 Auxiliary piece 17 Screw hole 18 Welded portion 19 Outer frame 20 Reinforcement material 21 Connection auxiliary plate 22 Reinforcement piece 23 Screw long hole 24 Welded portion 25 Screw 26a Upper outer frame 26b Lower outer frame 27a, 27b, 27c, 27d Reinforcement material 28a, 28b, 28c, 28d Reinforcement material 29, 30 Connection Plate 31a, 31b Reinforcement material 32, 33 Plate fixing frame 34a, 34b Fixing hole 35 Connecting bracket 36 Base bar 36a Gold wheel 37 Relay pulley 38 Assembly winch 39 Intermediary rope 40 Relay pulley

Claims (3)

  A base member connected to the top of the steel tower, a polygonal column-shaped frame body, a ground member connected to the base member, and a polygonal pyramid-shaped frame body, each tip on each side of the top of the ground member A pair of arm members that are connected so as to extend in the opposite directions in the horizontal direction, and a suspension wire provided on the bottom of the arm member to attach a tip of a suspension wire for hanging the arm metal, and to fix the suspension wire A temporary arm consisting of a fixed plate to which a pulley can be attached.   2. The temporary arm according to claim 1, wherein the base member, the ground member and the arm member are made of angle steel.   An assembly method for a brace in a power transmission line tower using the temporary arm according to claim 1 or 2, wherein a base rod provided with a pulley on which a suspension wire can be movably hung is provided near the top of the tower body. The pulley is fixed so that it is located above the tower top, and the base member connected to the suspension wire tip is lifted by pulling the other end of the suspension wire, connected to the tower top, and As in the case of the base member, the ground member is lifted and connected to the base member. Further, similarly to the case of the base member and the ground member, the arm members are sequentially lifted, and the ground member is After assembling a temporary arm at the top of the tower body by projecting horizontally on the upper part on both sides of the assembled member, fix the tip of the suspension wire to the fixed plate of the temporary arm and remove the arm The suspension wire attached movably to the movable pulley connected to the function is hanged over the fixed pulley provided on the fixed plate and the relay pulley provided on the connecting portion between the arm member and the ground member, A method of assembling a brace in a power transmission line tower using a temporary arm, wherein the arm is lifted by pulling the other end of the suspension wire on the ground and fixed to a predetermined part of the side of the tower main body.

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