JPH0526894Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a support device for an overhead line protection net used in power transmission line extension work and wire tensioning work.

[Conventional technology]

When installing a new power transmission line, it is often installed to cross over the existing power transmission line 25, and objects under construction may fall onto the existing power transmission line 25, or the wire may hang down and come into contact with it. This may cause an accident. Therefore, as shown in FIG. 7, temporary steel towers 10 are constructed on both sides of the existing power transmission line 25 and protective nets 20 are stretched between the towers, or temporary towers 10 are constructed from the new tower 30 to the end of the existing power transmission line 25. A steel tower 10 is constructed, and a protective net 20 is installed between the new steel tower 30 and the temporary steel tower 10.
Accidents were prevented by measures such as installing safety nets.

[The problem that the idea aims to solve]

However, if the temporary towers 10 are built on both sides of the power transmission line as described above, a large site for temporary construction and foundation work for the temporary towers will be required, making the construction complicated and a huge financial burden. There was a problem.

Furthermore, in the newly constructed steel tower 30, the spacing between the main pillar members generally varies depending on the height, so the supporting spacing of the nets also varies. Therefore, unless a single type of support device for catenary protection nets is compatible with various net support intervals, there is a problem in that the construction work will be complicated and it will be a huge economic burden.

This invention was made in view of the above problems,
It is an object of the present invention to provide a support device for a catenary protection net that can simplify and inexpensively carry out construction work for stretching the catenary protection net.

[Means to solve the problem]

This idea is based on a pair of overhead wire protective net tensioning towers, at least one of which is replaced by a new power transmission line tower, which is protruded from the main column member of the new power transmission line tower, and a protective net for protecting existing overhead wires is stretched. a pair of left and right upper support members each having a fixed length and fixed to the new steel tower to support the upper part of the temporary arm; and a pair of upper support members fixed to the new steel tower to support the lower part of the temporary arm. It has a pair of left and right extendable lower side support members, and a band type metal fitting for supporting the temporary arm is provided at each of the tips of the upper side support member and the lower side support member on the side of the new steel tower, and The upper support member and the lower support member are rotatably connected to the temporary arm.

The main column members of the steel tower are generally made of angle iron or steel pipes, but the present invention can be made of either of these.In the case of angle steel, the main column members of the new steel tower are provided with small intervals. It is desirable to temporarily install an attached pipe in parallel with a band type support fitting and a fixed type support fitting, and to support the temporary arm arm on the attached pipe via the band type metal fitting.

In order to implement the present invention when the main column member of the steel tower is made of steel pipes, the upper side support member and the lower side support member are temporarily installed directly on the main column member of the newly constructed steel tower using the band type metal fittings. The temporary arm can be supported.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. When installing a new power transmission line, use the existing power transmission line 25
When intersecting with the existing power transmission line, the new tower 30 is constructed as close to the existing power transmission line as possible, taking into account slack during construction of the new power transmission line. In this example,
As shown in Figure 1, by substituting at least one of the temporary towers with a new transmission line tower, the construction site can be reduced and the foundation work, assembly, dismantling, and removal work for one temporary tower can be reduced. This is not necessary and reduces construction costs.

The main column member of the new steel tower 30 may be made of angle iron or steel pipe. Next, each case will be explained.

FIG. 2 shows an example in which angle iron is used as the main column member 1 of a new steel tower 30 to be used instead of the temporary steel tower 10, and the connection between the temporary cross arm 15 and the main column member 1 is FIG. In this embodiment, an attached pipe 4 is fixed to the main column member 1 with a band type support fitting 2 and a fixed type support fitting 3, and the attached pipe 4 is extended from the main column member 1 at a small interval. has been done.

Temporary cross arms 15 are attached and fixed to the attached pipe 4 using band-type metal fittings 5, and the temporary cross arms 15 protrude from both sides of the steel tower. And temporary steel tower 10
A temporary arm 16 protruding from both sides of the arm 1 and the temporary arm 1
A protective net 20 made of wire and nylon rope is stretched between the wire and the wire. When the construction work for the new power transmission line is completed, the protective net is removed, the temporary arms 15 and the temporary steel tower 10 are dismantled and removed from the newly installed main column member 1, and the line is moved to the next construction site.

FIG. 3 shows an example in which a steel pipe is used as the main column member 6 of a new steel tower 30 used in place of the temporary steel tower 10.
FIG. 4 is a front view showing the connection between the main column member 6 and the main column member 6; In this case, the temporary cross arm 15 can be attached and fixed directly to the main pillar member 6 using the band type metal fitting 5.

In this way, the main column members of a new steel tower may be made of angle iron or steel pipes, but when angle iron is used, the attached pipe 4 should be connected to the band type support fitting 2 and fixed support. By temporarily attaching the metal fitting 3 to the main column member 1 and supporting the temporary arm 15 with this attached pipe 4, or when using a steel pipe, attaching the temporary arm to the main column member 6 directly with the band type metal fitting 5. 15, it is possible to fix the temporary cross arm 15 with sufficient strength without damaging the main column members 1 and 6 by drilling bolt holes. It is also possible to easily remove the attached pipe 4 from the member 1 and reuse it at the next work site, resulting in good workability and economical cost reduction.

Next, the detailed structure when attaching the temporary cross arm 15 to the main pillar member will be explained with reference to FIGS. 4 to 6. The following example uses a steel pipe as the main column member. In addition, the same or similar parts in the figures are indicated by the same numbers.

The overhead wire protection net support member of this embodiment includes a support structure for supporting the temporary cross arm 15. This structure includes an upper support member 17 that supports the upper part of the temporary cross arm 15, and a lower support member 8 that supports the lower part. FIG. 4 is a plan view of the support structure for supporting the temporary cross arm 15, showing the upper support member 17 and the like. FIG. 5 is a front view of the support structure. FIG. 6 is a diagram showing the lower support member 8 of the same support structure.

The upper support member 17 is a pair of left and right fixed-length support members that are provided with pivots at both ends and are rotatable, and support the upper part of the temporary cross arm 15.
The temporary cross arm 15 side is pinned via the pin contact 7, and the other end is secured to the band type metal fitting 5.

In addition, in the support structure for supporting the temporary cross arm 15, one end is fixed to the main pillar member 6 with a band type metal fitting 5, and the other end is fixed to the temporary arm arm 15 via a pin contact point 7. A telescopic auxiliary telescopic member 40 is arranged in parallel with the upper support member 17 . The auxiliary telescopic member 40 is rotatable by providing pivots at both ends like the upper support member 17, and supports the upper part of the temporary arm 15.
One end thereof is connected to the same band type metal fitting 5 as the upper side support member 17, and the other end is connected to the upper side support member 17 at the same height as the upper side support member 17 with respect to the temporary arm 15 via the pin contact point 7. It is pinned at a distance. Both ends of this auxiliary telescoping member 40 form a turnbuckle mechanism having threaded portions 9.
Note that 18 is an intermediate member having a fixed length. Since the upper support member 17 and the intermediate member 18 of this embodiment have fixed lengths, the dimensions can be determined easily and the construction work is simple. The length at the time of joining can be adjusted using the auxiliary elastic member 40.

Like the upper support member 17, the lower support member 8 is rotatable by providing pivots at both ends, and unlike the upper support member 17, the temporary cross arm 1
These are a pair of left and right telescopic members that support the lower part of the 5. One end is fixed to the main pillar member 6 with a band-type metal fitting 5, the other end is pinned to a temporary arm 15 via a pin contact 7, and both ends form a turnbuckle mechanism having a screw portion 9. Further, in the lower surface side support member 8 as well, an auxiliary telescopic member 41 similar to that in the case of the upper surface side support member 17 is arranged in parallel. Since the lower surface side support member 8 and the auxiliary telescopic member 41 can be freely extended and contracted, the range of types of steel towers to which they can be attached is widened.

[Effect of idea]

According to the overhead line protection net support device according to the present invention described above, by substituting at least one of the temporary towers with a new transmission line tower, the construction site can be reduced and the foundation work for one temporary tower can be completed. , there is no need for assembly, disassembly, or removal work, making construction simple and inexpensive.

In addition, the left and right pair of fixed-length upper side support members and the left and right pair of telescopic lower side support members are rotatably connected to the temporary arms, and the lower side support members are expandable and retractable. Since the spacing between the main pillars varies depending on the height of the new tower, even if the net support spacing varies, it can be handled with one type of overhead wire protection net support device, and various sizes of overhead wire protection net support devices are available. There is no need to carry out the construction work, and in this respect as well, the overhead wire protection net installation work can be made simple and inexpensive.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is a schematic perspective view, Fig. 2 is a front view showing the connection of a temporary arm when the main column member is made of angle iron, and Fig. 3
The figure is a similar front view when the main column member is made of steel pipes, Figure 4 is a plan view of the support structure for supporting the temporary cross arm, showing the upper side support member, etc., and Figure 5 is the same support structure. FIG. 6 is a front view, and FIG. 6 is a view showing the lower support member of the support structure, and FIG. 7 is a perspective view showing a conventional support device for an overhead wire protection net. 1... Main column member made of angle iron, 2... Band type support fitting, 3... Fixed support fitting, 4... Attached pipe, 5... Band type fitting, 6... Main column member made of steel pipe, 7 ...Pin contact, 8...Bottom side support member, 9
...screw part, 10...temporary steel tower, 15...temporary steel arm, 16...temporary steel tower arm, 17...top support member, 18...intermediate member, 20...protective net, 25... ...Existing power transmission lines, 30...New steel towers. 4
0... Auxiliary telescopic member, 41... Auxiliary telescopic member.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A pair of overhead wire protection nets, at least one of which is substituted with a new transmission line tower, are installed protruding from the main pillar members of the new transmission line tower to protect existing overhead wires. Temporary armrests on which protective nets are stretched,
A pair of left and right upper support members having a fixed length are fixed to the new steel tower and support the upper part of the temporary arm; and a pair of left and right lower surfaces are extendable and retractable and are fixed to the new steel tower and support the lower part of the temporary arm. side support members, and band-type metal fittings are provided at the tips of the upper side support members and the lower side support members on the side of the new steel tower, respectively, and the upper side support members and the lower side support members are connected to the temporary arms. A support device for the overhead line protection net rotatably connected to the (2) Attachment pipes are temporarily installed parallel to the main pillar members of the new steel tower made of angle iron using band-type support fittings and fixed-type support fittings at small intervals, and the attached pipes are used to support the band-type A support device for an overhead line protection net according to claim 1, which supports the temporary arm through a metal fitting. (3) The main column member of the new steel tower, which is made of steel pipes,
2. The support device for an overhead wire protection net according to claim 1, wherein the upper side support member and the lower side support member are directly installed by the band-type metal fittings to support the temporary arms.