JP4064935B2 - Temporary arm and assembly method of arm bracket in transmission line tower using this temporary arm - Google Patents

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) protruding obliquely outward from the outer frame of the tower top, and one end of the pulley is on the ground. 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. A temporary arm composed of a plurality of fixed plates with different horizontal positions from each other, which can be attached with a tip of a suspension wire for attaching a fixed pulley on which the suspension wire is hung. The four support members are fixed to the vertical frames at the four corners of the top of the tower, and each support member is provided with a connection auxiliary plate at the upper end of a predetermined length of angle steel material. A piece with each edge They are in contact with each other so as to form a predetermined angle and project in a direction perpendicular to the connection auxiliary plate surface, and are provided with a plurality of screw holes. A connection auxiliary plate substantially the same as the connection auxiliary plate of the base member is provided at each lower end of the outer frame of the base member. The connection auxiliary plate has two reinforcing pieces, each edge is close to each other, and each other is a predetermined one. Abutting at an angle and projecting in a direction perpendicular to the connection auxiliary plate surface, and provided with a plurality of long holes for screws, the connection auxiliary plate on the base member side is connected to the connection auxiliary plate on the ground member side The grounding member is placed on the base member in such a manner that the screw holes in the auxiliary connecting plate on the base member side and the long holes for screws in the auxiliary connecting plate on the grounding member side are positioned correspondingly. By inserting and tightening, the structure member is configured to be connected to the base member. It is an butterfly.

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

Further, the assembling method of the arm bracket in the transmission line tower using the temporary arm according to claim 3 is the assembling method of the arm bracket in the transmission line tower using the temporary arm according to claim 1 or claim 2. Then, a base rod provided with a pulley that can hang a suspension wire movably is fixed near the top of the tower so that the pulley is positioned above the top of the tower, and a base member connected to the tip of the suspension wire is provided. The other end of the suspension wire is lifted up and connected to the top of the tower, and in the same manner as in the case of the base member, the base member is lifted up to the outer surface of the connection auxiliary plate on the base member side. Place the grounding member on the base member so that the outer surface of the auxiliary connecting plate on the member side overlaps, and the screw hole of the auxiliary connecting plate on the base member side and the screw length of the auxiliary connecting plate on the grounding member side Place the hole in the corresponding position, insert the screw, and tighten Are connected to the base member, and each arm member is sequentially lifted in the same manner as in the case of the base member and the ground member, and is horizontally projected on both upper portions of the ground member. After assembling the temporary arm at the top of the steel tower, the suspension wire tip is fixed to the fixing plate selected so as to match the size and type of the arm metal to be attached among the plurality of fixing plates of the temporary arm, and the arm The other end side of the suspension wire to which the movable pulley to which the gold is detachably connected is movably attached is connected to the fixed pulley provided on the selected fixed plate, and the relay provided on the connecting portion between the arm member and the ground member. The arm is lifted by pulling the other end of the suspension wire on the ground and fixed to a predetermined part on the side of the tower. It is characterized in.

  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, a base member, a ground member and two arm members, and is sequentially lifted and assembled on the tower top, assembly work and dismantling work on the tower top are easy, and the horizontal positions of each other are different. Since a plurality of fixing plates are provided, it is possible to select a fixing plate according to the size and type of the brace to be attached. Furthermore, when assembling the ground member to the top of the tower, four of the base members If the supporting auxiliary plate of the support member is overlapped with the auxiliary connecting plate of the grounding member, the screw hole on the base member side and the long screw hole on the grounding member side are aligned and tightened, and both are tightened Can be connected, so Standing work an effect that is easier.

  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 Can be performed easily and stably, and the position where the arm is suspended can be changed horizontally according to the size and type of the arm. Then, the auxiliary connecting plate of the grounding member is overlapped with the auxiliary connecting plate of the four support members of the base member, and the screw hole on the base member side and the long screw hole on the grounding member side are made to correspond to each other. If the screws are inserted and tightened, they can be connected to each other, so that the assembling operation is easier.

  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 FIGS. 1 and 16 to 19, the brace 5 a is assembled so as to protrude horizontally on both sides of the upper part of the steel tower A, and an underline arm and an upline arm that is longer than the underline arm are provided. It is configured by combining. 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 horizontally extends on both sides of the tower A below the pair of arm metal 5a. It is assembled so as to protrude. 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, the assembly work process to the steel tower A of the said arm brackets 5a and 5b is demonstrated.

  (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 located near the top of the steel tower A, and the gold wheel 36a is connected to the steel tower A. The suspension wire 6 is fixed so as to be positioned above the top portion, and the base member 2 (configured by four support members 12) is connected to the tip of the suspension wire 6 that spans the gold wheel 36a and extends through the relay pulley 37. Is taken up and pulled by the assembly winch 38 to lift the platform member 2 and connect it to the top of the tower A. The lifting work is performed while appropriately pulling in the lateral direction with the intermediary rope 39 so as to separate the base member 2 from the steel tower A so as not to collide with the steel tower 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 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 top of the steel tower A. In addition, the code | symbol 40 is a relay pulley arrange | positioned in the steel tower 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 arm metal 5b is connected to the second semi-metal wheel 9 as the moving pulley, and the tower A at the lower position of the arm metal 5a is connected in the same manner as the above-mentioned working step 3. Two arms 5b are sequentially lifted and assembled on the side.

  (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 embodiment described above. For example, the number of the fixing plates 8a, 8b, and 8c is not three as described above, but may be two or four or more. .

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
DESCRIPTION OF SYMBOLS 1 Temporary arm 2 Base member 3 Ground member 4 Arm member 5a Arm metal 5b Arm metal 6 Hanging wire 7 1st semimetal wheel 8a. 8b, 8c Fixing plate 9 Second semi-metal wheel 10 Flying wheel 11 Vertical frame 12 Support material 12a Angle steel material 13 Connecting 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 Reinforcing 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 composed of a plurality of fixed plates with different positions in the horizontal direction to which a pulley can be attached, wherein the base member is composed of four support members fixed to vertical frames at the four corners of the tower top. Each supporting member is provided with a connecting auxiliary plate at the upper end of an angle steel material of a predetermined length, and the connecting auxiliary plate has two reinforcing pieces, each edge is close to each other, and each makes a predetermined angle. Butt and join Projecting in a direction perpendicular to the auxiliary plate surface and provided with a plurality of screw holes, on the other hand, the ground assembly member is connected to the lower end of the four outer frames at the connection auxiliary plate of the base member The auxiliary connecting plate is substantially the same as the auxiliary connecting plate. The connecting auxiliary plate has two reinforcing pieces abutting each other so that their edges are close to each other and form a predetermined angle with each other, and is perpendicular to the connecting auxiliary plate surface. In addition to projecting in the direction, a plurality of elongated holes for screws are provided, and the grounding member is placed on the base member so that the grounding member side of the grounding member side of the grounding member is overlapped with the base auxiliary member side of the grounding member. Place the screw on the base member by inserting the screw and tightening the screw holes in the auxiliary screw on the base member side and the long hole for screw on the auxiliary auxiliary plate on the side of the base member. A temporary arm configured to connect members.   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 bar provided with a pulley on which a suspension wire can be movably hung is provided near the top of the tower. The pulley is fixed so that the pulley is positioned above the tower top, and the base member connected to the tip of the suspension wire is lifted by pulling the other end of the suspension wire, connected to the top of the tower, and the platform As in the case of the member, the grounding member is lifted, and the grounding member is placed on the base member so that the external surface of the auxiliary supporting plate on the side of the base member is overlapped with the external surface of the auxiliary supporting plate on the side of the basement member. Then, the screw hole of the auxiliary connecting plate on the base member side and the long screw hole on the auxiliary connecting plate on the ground member side are positioned correspondingly, and the screw is inserted and tightened to connect on the base member, Still further, the base member and the ground member In the same manner as described above, each arm member is lifted sequentially, and is horizontally projected on the upper portions on both sides of the ground assembly member. After the temporary arm is assembled at the top of the steel tower, it is attached among the plurality of fixed plates of the temporary arm. The other end side of the suspension wire to which a movable pulley to which the arm metal is detachably connected is fixed to the fixed plate selected so as to match the size and type of the arm metal, and the movable pulley is movably attached. The arm is stretched over the fixed pulley provided on the selected fixed plate and the relay pulley provided at the connecting portion of the arm member and the ground member, and the other end of the suspension wire is pulled on the ground. A method for assembling a brace in a power transmission line tower using a temporary arm, wherein gold is lifted and fixed to a predetermined part on the side of the tower.

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