JPH0118526B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tensioning device mounting bracket for attaching a conductor tensioning device to a steel tower arm having an angle structure.

In recent years, as the demand for electricity has increased, the development of ultra-super-high voltage, large-capacity power transmission has been actively promoted, and along with this, plans are being made to make conductor tension devices, transmission towers, etc. more rigid and larger.

By the way, as shown in FIG. 1, the conventional tension device mounting bracket connects a flat board 2, which is provided with connecting fittings 1 on both sides (or one side) of the conductor tension device, to the tip of a steel tower arm 3. It was attached to the lower surface with a connector via a batten 4. Therefore, the board 2 easily slips against the horizontal force, and the board mounting bolts 5
They all had the disadvantage of being larger in structure, such as the need to have a high safety factor because they were all subjected to shearing forces. or,
Generally, the structure of the tip of a steel tower arm is such that a pair of angles 7 and a pair of angles 8 are attached to the upper and lower parts of a flat vertical member 6 in a state of joining hands, and battens 9 and 4 are connected to the upper and lower end surfaces, and the lower end Since the tensioning device mounting bracket was attached to the batten 4, the tip of the tower arm had the disadvantage that it was subjected to a large torsional moment due to the external force acting on the tensioning device mounting bracket. Therefore, the tension device mounting bracket and the tip of the tower arm configured as described above are unsuitable for ultra-super-high voltage, large-capacity power transmission where extremely large external forces are generated, and drastic countermeasures are desired.

The present invention aims to eliminate the above-mentioned drawbacks, and increases the strength of the board by protruding a pair of vertical members parallel to the longitudinal direction of the tower arm at a predetermined interval in the middle of the top surface of the board. Furthermore, by attaching the top surface of the board and the vertical member to the bottom surface and the vertical wall of the tip of the tower arm, the tension device mounting bracket can be firmly mounted three-dimensionally to the tower arm, thereby preventing the board from slipping. In addition to eliminating the phenomenon,
This eliminates the need for a batten during installation, and the tip of the tower arm can be easily and inexpensively made into a box-shaped structure by using a pair of vertical members of the tension device mounting bracket, dramatically increasing the strength of the tower arm. It is something that has been increased.

The present invention will be specifically described below based on embodiments shown in the drawings. In FIGS. 2 and 3, reference numeral 11 indicates a tip end of a tower arm of a power transmission tower, and reference numeral 12 indicates a tension device mounting fitting. This tension device mounting bracket is for board 1
A pair of vertical members 14 are protruded from the middle of the upper surface of 3 at a predetermined interval in parallel with the longitudinal direction of the tower arm, and on both sides (or one side) of the base plate 13, there are provided a pair of vertical members 14 for attaching a conductor tension device to the other end. A connecting fitting 16 formed with a clevis portion 15 for attaching a mounting portion, for example, a tower-side yoke of a conductor tension device, is rotatably connected by a support shaft 17. Incidentally, the connecting fitting 16 shown in FIG. 3 is for a conductor having a horizontal angle.

The vertical member 14 of the substrate 13 is the tip part 1 of the steel tower arm.
A large number of bolt holes 19 are drilled in the vertical member 14 and the top surface 18 in order to respectively attach the top surface 18 of the base plate 13 to the bottom surface of the tip end 11 of the steel tower arm. In this embodiment, the intermediate vertical member 20 and the lower angle 21, which are the constituent elements of the tower arm tip 11, are sequentially stacked on the outer wall of each vertical member 14 and connected by a connector 22, and connected to the upper surface 18 of the base plate 13. The horizontal portion 23 of the lower angle 21 is connected by a connector 22.

The tower arm tip 11 has an intermediate vertical member 20 attached to the vertical member 14 of the base plate 13 and a lower angle 2.
1 are connected in advance, and an upper angle and other appropriate members are attached to the upper part of the pair of intermediate vertical members 20 to constitute an upper beam. In this embodiment, the upper part of the pair of intermediate vertical members 20 is attached to a hanging material fitting 25 having a box-shaped protrusion 24 protruding from the middle of the lower surface.
and a pair of upper angles 26 to form a box-shaped structure at the middle upper part of the tip of the steel tower arm, and the middle lower part forms a space into which the pair of vertical members 14 of the base plate 13 can be inserted.

Note that the pair of vertical members 14 of the substrate 13 are connected to the ribs 27.
They may be connected to form a box shape.

In the tension device mounting bracket according to the present invention, the substrate 13 has a pair of vertical members 14 protruding from its upper surface.
This pair of vertical members is fitted into the lower part of the tower arm tip 11 and is reinforced by the upper surface part 18 of the base plate and the lower vertical part 28 of the tower arm tip.
By attaching it to the horizontal portion 23, a strong three-dimensional attachment is achieved. Therefore, there is no need for a batten for position correction and connection of the pair of lower angles 21 at the lower end of the tower arm, so materials can be saved. Furthermore, since the axes of the connectors 22 attached to the horizontal portion 23 and vertical portion 28 of the pair of lower angles 21 are out of phase by 90°, the conventional structure in which all the connectors to which the tension device mounting brackets 12 are attached are subjected to shearing force. The above drawbacks are eliminated, the designed strength of the connector can be set high, and the phenomenon of slipping of the tension device mounting bracket against the tip of the tower arm can be eliminated. Therefore, since a part of the tip of the tower arm is also used as the vertical member 14 of the tension device mounting bracket, material can be saved, and the tip of the tower arm can be easily made into a box-shaped structure by using a pair of vertical members. Therefore, it has excellent effects such as being able to dramatically increase the strength of the tip of a steel tower arm using inexpensive means.

[Brief explanation of drawings]

FIG. 1 is a side view of a conventional product attached to a steel tower arm, FIG. 2 is a side view showing an embodiment of the present invention, and FIG. 3 is a view taken along line A--A in FIG. 11... Steel tower arm tip, 12... Tension device mounting bracket, 13... Board, 14... Vertical member, 1
6...Connection fittings.

Claims (1)

[Claims] 1 At least one side of the board is equipped with a connecting fitting for attaching a conductor tension device, and a pair of vertical members is provided protruding from the middle of the upper surface of the board parallel to the longitudinal direction of the tower arm at a predetermined interval. A tension device mounting bracket for attaching the board to the vertical wall of the tip of the tower arm, and the top surface of the board to the bottom of the tip of the tower arm.