JP2014105546A - Rust-proof cover for lower fixing bracket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an iron member, which configures a lower fixing bracket for fixing a safety wire to a steel tower main material, from being broken by being deteriorated because the iron member gathers rust with time due to rainwater.SOLUTION: A rust-proof cover for a lower fixing bracket includes a resin cover body 2, and fastening means 30 for fixing the cover body to a lower part of a safety wire. The cover body comprises a cylindrical upper cylinder 5 that is brought into close contact with an outer surface of the lower part of the wire, and a lower umbrella part 10 that is expanded like an umbrella downward in such a manner that lower and upper openings of the upper cylinder are integrated together in the state of communicating with each other. The fastening means fastens and fixes at least the upper cylinder in the state of bringing it into watertightly close contact with an outer surface of the lower part of the wire.

Description

  In the present invention, the iron member constituting the lower fixing bracket for fixing the safety wire arranged in the vertical direction along the main material of the transmission tower to the main material is rusted and deteriorated over time by rainwater, and is damaged. The present invention relates to a rust preventive cover for a lower fixing bracket that can be prevented.

The power transmission tower is provided with a crash prevention device in order to prevent a crash accident when an operator goes up and down for maintenance and inspection. The fall prevention device consists of a safety wire made of aluminum strands arranged from the upper part to the lower part of the steel tower main material, and a dedicated lip (elevator) worn by workers who move up and down the tower. Is done.
The safety wire has an upper portion, an intermediate portion, and a lower portion fixed to the tower main material by fixing brackets, and other appropriate places are detachably supported from the tower by supporting brackets.
In other words, the rope that is attached to the safety belt worn by the worker is provided with a dedicated lolip (elevator) that is movably attached along the safety wire. When passing through the support fitting, the gripping state of the safety wire by the support fitting is temporarily released, the safety wire is detached from the support fitting, and then the lip is passed.
And even if the operator slides his feet and hands from the tower during the ascending / descending tower, the support metal fittings, fixing metal fittings, etc. serve as stoppers for the lip so as to prevent long-term drops and crashes. .

FIG. 8 is a diagram for explaining the configuration of a conventional fall prevention device. A safety wire W is arranged in the vertical direction on the main material 101 of the tower 100 by an upper fixing bracket, an intermediate fixing bracket, and a lower fixing bracket 105 (not shown). ing. The lower fixing bracket 105 includes an aluminum connecting member 107 that fixes the lower portion of the safety wire W, an iron bolt member 108 that supports the upper annular portion 108a by the connecting member and extends downward, and a male screw portion of the bolt member. A fixing member 110 that includes a screwing portion 110a for screwing 108b and detachably fixes the bolt member to the lower part of the tower.
The reason why the connector 107 is made of aluminum of the same material as that of the safety wire W is that deterioration is promoted by a chemical reaction when the connector 107 is made of a different metal because it is a member that directly contacts the safety wire W.
By the way, the lower fixing bracket 105 is constantly exposed to wind and rain, and the iron bolt member 108 is likely to rust due to repeated adhesion of rainwater, and the bolt member deteriorated due to rusting is destroyed by vibration and impact when moving up and down the tower. It becomes easy. When the bolt member is broken, the safety wire is detached from the lower fixing bracket, so that there is a risk that the safety wire may swing and the worker may be suspended in the air.

Also, when the operator lifts and lowers the tower, it moves while releasing the engagement between the support bracket and the safety wire. However, when the bolt member breaks, the safety wire that has been fixed in the tensioned state until then is moved upward. There is a danger of jumping up and coming into contact with live parts on the tower.
In addition, when replacing the corroded bolt member of the lower fixing bracket with a new one, the weight of one new lower fixing bracket is about 5 kg, the tool is about 1 kg, and the tool for pulling the wire is 3 kg. A lot of labor and cost will be required for transportation to the site and installation to the steel tower.
In order to deal with such problems, a rust preventive agent is periodically applied to the iron part of the lower fixing bracket to suppress the progress of rusting, but the labor and cost required for that are enormous. Yes.

In the “rainwater inflow prevention structure” of Patent Document 1, in order to prevent rainwater from flowing into the tower side from the lower fixing bracket through the safety wire, rainwater that has been transmitted through the safety wire to the lower fixing bracket. The structure which provided the rainwater control part which guides to other than a steel tower side is disclosed. It also prevents rusting due to moisture adhering to the lower fixture.
Patent Document 1 is to prevent the lower fixing bracket for fixing the safety wire from rusting with rainwater, but it does not completely cover the lower fixing bracket to prevent the attachment of rainwater. It cannot prevent the lower fixing bracket from getting wet by wind and rain, and cannot prevent rusting of the bolt member.

  The “clothes hanger frame device” of Patent Document 2 relates to a waterproof curtain for enclosing the outside of a clothesline with hanging clothespins and preventing rainwater and dust from adhering to the laundry. This is a technique for surrounding a laundry to be protected from rainwater with a waterproof curtain, and is not intended to prevent rainwater from adhering to the lower fixing bracket of the safety wire and preventing rusting. For this reason, even if this waterproof curtain is applied to the lower fixing bracket, it cannot be used for waterproofing.

JP 2012-31696 A JP 2010-166964 A

In the fall prevention device for power transmission towers, the iron members that make up the lower fixing bracket are exposed to wind and rain, and rust and deteriorate over time. It may cause.
The present invention has been made in view of the above, and an iron member that constitutes a lower fixing bracket that fixes a safety wire arranged in a vertical direction along a main material of a power transmission tower to the main material is caused by rainwater. It is intended to provide a rust-proof cover for a lower fixing bracket that prevents rusting, deterioration, and breakage.

  In order to achieve the above object, the invention of claim 1 is a rust-proof cover for a lower fixing bracket for fixing the lower part of an aluminum safety wire whose upper part is fixed to the upper part of the tower main material to the lower part of the tower main material. The lower fixing bracket includes an aluminum connecting member fixed to a lower portion of the safety wire, an iron bolt member supported at an upper portion by the connecting member and extending downward, and the bolt member connected to the tower. A fixing member that is detachably fixed to the lower part of the main material, and the rust-proof cover includes a resin cover body and fastening means for fixing the cover body to the lower part of the safety wire, The cover body has a cylindrical upper cylindrical body that is in close contact with the outer surface of the lower part of the safety wire that extends upward from the connector, and the lower main body and the upper opening that are in communication with each other. And a lower umbrella part that covers the bolt member by expanding in an umbrella shape downward, and the fastening means watertightly secures at least the upper cylindrical body. It is configured to be fastened and fixed in a state of being in close contact with the outer surface of the lower part of the wire.

The invention according to claim 2 is characterized in that an adhesive layer is formed on the inner surface of the upper cylindrical body so as to enter and adhere to the spiral groove on the outer surface of the safety wire which is a stranded wire.
The invention of claim 3 is characterized in that an inner circumferential groove extending from the upper opening toward the lower opening is continuously formed in the circumferential direction on the inner surface of the lower umbrella portion.
The invention of claim 4 is characterized in that an annular return piece protruding from the inner peripheral edge of the lower umbrella portion toward the inner diameter direction is provided.

  According to the present invention, the waterproof cover that covers the lower fixing bracket is fixed to the lower portion of the safety wire, so that the iron member constituting the lower fixing bracket is prevented from rusting and deteriorating due to rainwater over time. can do. When water has entered the lower umbrella, the inner circumferential groove provided on the inner surface of the umbrella captures water and guides it downward, so that it is possible to prevent water from adhering to the iron member.

It is an image figure which shows the state which mounted | wore the lower fixing bracket with the antirust cover of the lower fixing bracket of this invention. It is detail drawing which shows the state equipped with the antirust cover. (A) is an external appearance perspective view of a rust prevention cover, (b) is a top view. It is a longitudinal cross-sectional view of a rust prevention cover. It is sectional drawing explaining the waterproof function in each part of a rust prevention cover. It is a partial cross section figure of the edge of a lower umbrella part. It is a longitudinal cross-sectional view of the antirust cover which concerns on other embodiment of this invention. It is structure explanatory drawing of the conventional fall prevention apparatus.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
FIG. 1 is an image view showing a state in which the rust-proof cover of the lower fixing bracket of the present invention is mounted on the lower fixing bracket, FIG. 2 is a detailed view showing a state in which the rust-proof cover is mounted, and FIG. FIG. 4 is a longitudinal sectional view of the rust prevention cover, FIG. 5 is a sectional view for explaining the waterproof function in each part of the rust prevention cover, FIG. 6 is a partial cross-sectional view of the edge of the lower umbrella.
The crash prevention device includes an aluminum safety wire W fixed to the steel tower main material, an upper fixing metal fitting for fixing the safety wire to the steel tower main material 101, an intermediate fixing metal fitting, a lower fixing metal fitting 105, and an operator. It consists of a rolip (not shown) attached to a torso that extends from a safety belt worn on the body.

As shown in FIG. 1, a safety wire W is fixed to a main material 101 of a tower 100 by an upper fixing bracket, an intermediate fixing bracket, and a lower fixing bracket 105 (not shown) in a state where the safety wire W is arranged in the vertical direction. The lower fixing bracket 105 includes an aluminum connecting member 107 that fixes the lower portion of the safety wire W, an iron bolt member 108 that supports the upper annular portion 108a by the connecting member and extends downward, and a male screw portion of the bolt member. A fixing member 110 that includes a screwing portion 110a for screwing 108b and detachably fixes the bolt member to the lower part of the tower.
As shown in FIG. 1, the rust-proof cover 1 is a resin cover body that covers the connector 107 and the bolt member 108 in an umbrella shape in a state of being fixed to the lower portion of the safety wire W located immediately above the connector 107. 2 and fastening means 30 such as an insulation lock for fixing the cover body to the lower part of the safety wire.
The cover main body 2 is integrated in a state in which the cylindrical upper cylindrical body 5 that is in close contact with the outer surface of the lower portion of the safety wire extending upward from the connector 108 and the lower opening 5a and the upper opening 10a of the upper cylindrical body 5 are in communication with each other. And a lower umbrella portion 10 that covers the connecting portion and the bolt member by expanding in an umbrella shape downward. The upper cylinder 5 and the lower umbrella 10 are integrated to prevent water leakage from the boundary between the two members. Moreover, it is comprised so that it can open and close with the joining line L extended to an axial direction like illustration for attachment to a safety wire etc.

The edge 7 of the upper cylindrical body 5 located on both sides of the joining line L and the edge 11 of the lower umbrella 10 are configured to overlap as shown in the partial sectional view of FIG. The corrugated portions 7a and 11a are provided to make it difficult to separate. Although the waveform portion 7a is not shown, it is the same as the waveform portion 11a.
The corrugated portions are dimensioned in advance so as to be closely aligned with each other over the entire length in the axial direction, and waterproofness can be ensured by increasing the number of corrugated portions and the circumferential length. . The edges can be waterproofed by joining with a strong adhesive having weather resistance in a state of being overlapped, a single-sided tape, a double-sided tape, or the like.
Even if the corrugated portion is not provided, it is easy to ensure waterproofness if the edges are bonded in a state of being overlapped.
The cover body 2 is made of a plastic material having flexibility and strength that does not break due to wind and rain or impact from falling objects, and also has weather resistance and sufficient shape retention. Further, at least a part of the bolt member may be transparent so that the state (rusting state) of the bolt member and the like located inside the cover body can be visually confirmed.

An adhesion layer 6 made of a soft material (packing) is formed on the inner surface of the upper cylindrical body 5 so as to enter the spiral groove on the outer surface of the safety wire, which is a stranded wire, and close the gap. Or you may form the contact | adherence layer 6 which consists of the spiral protrusion which penetrates into the spiral groove of an outer surface of a safety wire, and adhere | attaches it on the inner wall of an upper cylinder (FIG. 2).
That is, the adhesion layer 6 may be configured as a packing layer using a soft and different material on the inner surface of the base material layer of the cover body 2, or may be configured as a spiral protrusion on the inner wall of the cover body itself. The adhesion layer is made of a water-repellent material.

The adhesion layer 6 seals a spiral gap that is easily formed between the spiral groove on the outer surface of the safety wire and the wall of the upper cylindrical body, and therefore can prevent water from entering from the upper opening of the upper cylindrical body. .
Rainwater flowing down the safety wire cannot enter the interior from between the upper cylinder and the safety wire, so it flows along the outer surface of the upper umbrella body along the outer surface of the upper cylinder, Fall into.

Next, in this invention, the inner peripheral groove | channel 12 extended toward the lower opening 10b from the upper opening 10a is formed in the inner surface of the lower umbrella part 10 continuously in the circumferential direction. In this way, by forming a large number of inner peripheral grooves 12 extending downward on the inner surface of the lower umbrella portion and having a groove width of about several millimeters over the entire circumference, the capillarity is used to form the upper cylindrical body 5. Moisture flowing down along the inner wall can be guided and captured in the inner circumferential groove (FIG. 4).
That is, since the upper opening of the upper cylinder 5 is closed by the fastening means 30 and the adhesive layer 6 is provided on the inner surface thereof, it is unlikely that water will enter through the gap with the safety wire. However, even if rainwater intrudes into the interior due to insufficient fastening by the fastening means 30 or damage to the upper cylinder, most of the water within the inner surface of the lower umbrella 10 It can be sucked and guided into the circumferential groove 12. For this reason, it is possible to prevent water from entering the bolt member 108 via the connector 107. Rainwater that has flowed down along the inner surface of the lower umbrella part 10 falls to the ground from the lower opening 10b and does not wet the bolt member.
Even if the inner circumferential groove 12 does not exist, most of the water that has entered the upper cylinder falls along the inner wall of the umbrella, so that a waterproof effect can be exhibited.

Moreover, the lower umbrella part 10 can prevent adhesion to the bolt member 108 by guiding rainwater flowing down through the safety wire to the outer surface as well as rainwater falling directly on the outer surface thereof.
Since it comprised in this way, even if the axial direction length of the lower umbrella part 10 is comparatively shortened like FIG. 1, it functions effectively as a waterproof means with respect to the rain water falling from the top. However, in order to prevent the rainwater sprayed from the left and right direction from directly adhering to the bolt member, the lower umbrella portion 10 may be elongated downward so as to cover the entire bolt member.

The fastening means 30 is configured to fasten and fix at least the upper cylindrical body 5 in a state of being in close contact with the outer surface of the lower portion of the safety wire. In this example, the insulation lock is illustrated, but even if it is a vinyl tape, a thin wire, etc., there is no limitation as long as waterproofness can be maintained for a long time.
In the lower umbrella portion 10 of the present invention, the lower opening 10b is opened, so that it is not possible to prevent rainwater from adhering to the bolt member during a storm. . For this reason, deterioration due to rusting of the bolt member can be significantly delayed as compared with the case where the rust prevention cover 1 is not attached.

Next, FIG. 7 is a longitudinal sectional view of a rust preventive cover according to another embodiment of the present invention.
The rust-proof cover 1 is characterized in that an annular return piece 15 protruding toward the inner diameter direction is provided on the periphery of the lower opening 10b of the lower umbrella 10. The inner end edge 15a of the return piece 15 may be brought close to (in contact with) the bolt member 108, or may be separated as shown in the figure.
The return piece 15 is a means for preventing rain water from entering the lower umbrella part from the lower opening as much as possible when the wind and rain are strong. For this reason, it is preferable to incline downward toward the center (inner end edge 15a) as shown, but it may be horizontal or inclined upward toward the center.
The push-back piece 15 is integrated with the periphery of the lower opening 10b of the lower umbrella portion 10, and the material thereof is made of a resin material having sufficient durability, strength, and flexibility, like the lower umbrella portion.
As described above, in the present invention, the waterproof cover that covers the lower fixing bracket is fixed to the lower portion of the safety wire, so that the iron member constituting the lower fixing bracket is rusted and deteriorated over time by rainwater, and is damaged. Can be prevented.

Basically, it is difficult for water to enter between the upper cylinder and the wire. Even if water enters the upper cylinder, most of the water falls along the inner wall of the umbrella.
When water has entered the lower umbrella, the inner circumferential groove provided on the inner surface of the umbrella captures water and guides it downward, so that it is possible to prevent water from adhering to the iron member.
Since the upper cylindrical body has a water-repellent adhesive layer that is in close contact with the safety wire on its inner peripheral surface, it is possible to prevent water from entering from the upper opening in a normal state.

  DESCRIPTION OF SYMBOLS 1 ... Rust prevention cover, 2 ... Cover main body, 5 ... Upper cylinder body, 5a ... Lower opening, 6 ... Adhesion layer, 7 ... Edge edge, 7a ... Wave part, 10 ... Lower umbrella part, 10a ... Upper opening, 10b ... Lower opening, 11 ... edge, 11a ... corrugated part, 12 ... inner peripheral groove, 15a ... inner edge, 30 ... fastening means

Claims (4)

A rust-proof cover for the lower fixing bracket that fixes the lower part of the aluminum safety wire fixed to the upper part of the steel tower main material to the lower part of the steel tower main material,
The lower fixing bracket includes an aluminum connecting member fixed to a lower portion of the safety wire, an iron bolt member supported at an upper portion by the connecting member and extending downward, and the bolt member disposed on the lower part of the tower main material. A fixing member that is detachably fixed to,
The rust-proof cover comprises a resin cover body, and fastening means for fixing the cover body to the lower part of the safety wire,
The cover body is integrated in a state in which the upper cylindrical body that is in close contact with the outer surface of the lower part of the safety wire that extends upward from the connector is in communication with the lower opening and the upper opening of the upper cylindrical body. A lower umbrella part covering the connecting part and the bolt member by expanding in an umbrella shape downward;
The rust preventive cover for the lower fixing bracket, wherein the fastening means is configured to fasten and fix at least the upper cylindrical body in a state where the upper cylindrical body is in close contact with the outer surface of the lower part of the safety wire.   2. The anti-lowering bracket according to claim 1, wherein an adhesion layer is formed on an inner surface of the upper cylindrical body so as to enter and adhere into a spiral groove of the outer surface of the safety wire that is a stranded wire. Rust cover.   The inner wall of the lower umbrella portion is formed with an inner circumferential groove extending continuously from the upper opening toward the lower opening in the circumferential direction. Rust cover.   The rust preventive cover for the lower fixing bracket according to any one of claims 1 to 3, further comprising an annular return piece protruding in an inner diameter direction from an inner peripheral edge of the lower umbrella portion.

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