JP2014189210A - Corrosion-resistant structure of overhead power line support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corrosion-resistant structure of an overhead power line support device capable of preventing the insulation deterioration of the overhead power line support device, and capable of reducing maintenance costs.SOLUTION: A corrosion-resistant structure 11 prevents corrosion of an overhead power line support device 3 for supporting an overhead power line. A drain part 11a is formed, on a surface of the protective cover 6, in a convex shape on the entire outer periphery of both end parts of this protective cover 6 integrally with this protective cover 6. The protective cover 6 is cut in a predetermined length (for example, in substantially the same length as the outer peripheral of a horizontal column 5) according to an outer diameter of the horizontal column 5, and is wound and installed on a surface of the horizontal column 5. When a corrosion product C generated on a surface of an overhead power line metal fitting 9 flows out to the protective cover 6 by rainwater and tunnel water leakage, this corrosion product C drips downward from the drain part 11a, and the drain part 11a prevents flow-out of the corrosion product C to the horizontal column 5 from the protective cover 6.

Description

  The present invention relates to an anticorrosion structure for an overhead wire support device that prevents corrosion of the overhead wire support device that supports the overhead wire.

  Conventional overhead wire support devices include an arm that supports the trolley wire of the overhead wire, an ear that grips the trolley wire to the arm, a support bracket that rotatably supports the arm in the vertical direction within a vertical plane, and a structure such as a column. An insulated horizontal pipe supported by the cable is provided with an overhead wire fitting (pipe band) for connecting the support fitting (see, for example, Patent Document 1). In such a conventional overhead wire support device, a fluororesin sheet is provided between the outer peripheral surface of the insulated horizontal pipe and the inner circumferential surface of the overhead wire fitting so that the position of the overhead wire fitting can be finely adjusted with respect to the insulated horizontal pipe. A protective cover is attached.

  As shown in FIG. 10, the conventional overhead wire support device 103 has a protective cover so as to be sandwiched between the insulated horizontal pipe 105 and the overhead wire fitting 109 at a position where the overhead wire fitting 109 is mounted on the outer peripheral surface of the insulated horizontal pipe 105. 106 is attached. As shown in FIG. 11, the conventional overhead wire support device 103 winds a fluororesin sheet 106 a cut to a length slightly shorter than the outer periphery of the insulating horizontal pipe 105, and protects the outer peripheral surface of the insulating horizontal pipe 105. A cover 106 is attached.

JP 2005-008042 A

  In a conventional overhead wire support device, corrosion proceeds due to a corrosion factor due to the environment and contamination due to abrasion powder due to friction between the wheel and the rail. In such a conventional overhead wire support device, corrosion proceeds due to fouling, and corrosion products flow out due to rainwater or tunnel leakage, and normal metal fittings corrode. In an insulator, a fouling substance adheres and the insulation resistance decreases. In particular, in the insulated horizontal pipe, there is a problem that current easily flows between the metal fittings.

  The subject of this invention is providing the anticorrosion structure of the overhead wire support apparatus which can prevent the insulation deterioration of an overhead wire support apparatus and can reduce a maintenance cost.

The present invention solves the above-mentioned problems by the solving means described below.
In addition, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this embodiment.
The invention of claim 1 is an anticorrosion structure for an overhead wire support device for preventing corrosion of the overhead wire support device (3) for supporting the overhead wire (2), as shown in FIGS. An anticorrosion structure (11) for an overhead wire support device comprising a draining portion (11a) for guiding a corrosion product (C) flowing on the surface downward from the surface of the overhead wire support device.

  According to a second aspect of the present invention, in the anticorrosion structure for the overhead wire support device according to the first aspect, the overhead wire support device includes an overhead wire fitting (9) attached to a horizontal column (5) of the overhead wire support device, and the horizontal column. And a protective cover (6) for protecting the surface of the horizontal column, wherein the draining portion is formed on the surface of the protective cover. is there.

  According to a third aspect of the present invention, in the anticorrosion structure for the overhead wire support apparatus according to the second aspect, as shown in FIG. 4, the protective cover is wound around and mounted on the surface of the horizontal column. It is the anticorrosion structure of an overhead wire support apparatus.

  According to a fourth aspect of the present invention, in the anticorrosion structure for the overhead wire support apparatus according to the second aspect, as shown in FIG. 5, the protective cover is fitted and attached to the surface of the horizontal column. It is the anticorrosion structure of the overhead wire support apparatus.

  The invention according to claim 5 is the anticorrosion structure for the overhead wire support device according to any one of claims 2 to 4, wherein the protective cover is made of a fluororesin. Anti-corrosion structure.

  According to a sixth aspect of the present invention, in the anticorrosion structure for the overhead wire support device according to any one of the second to fifth aspects, the draining portion has a convex shape and / or a circumference of both ends of the protective cover. Or it is the anticorrosion structure of the overhead wire support apparatus characterized by being formed in concave shape.

  According to the present invention, it is possible to prevent insulation deterioration of the overhead wire support device and reduce maintenance costs.

It is the schematic which shows the use condition of the overhead wire support apparatus provided with the anticorrosion structure of the overhead wire support apparatus which concerns on 1st Embodiment of this invention as an example. BRIEF DESCRIPTION OF THE DRAWINGS It is an external view of the overhead wire fitting of the overhead wire support apparatus provided with the anticorrosion structure of the overhead wire support apparatus which concerns on 1st Embodiment of this invention, (A) is a front view, (B) is a top view, (C) Is a left side view, and (D) is a rear view. It is a side view which shows the state which attached the protective cover provided with the anticorrosion structure of the overhead wire support apparatus which concerns on 1st Embodiment of this invention to the horizontal support | pillar. It is a perspective view of a protective cover provided with the anticorrosion structure of the overhead wire support apparatus which concerns on 1st Embodiment of this invention. It is a perspective view of a protective cover provided with the anticorrosion structure of the overhead wire support apparatus which concerns on 2nd Embodiment of this invention. It is a side view which shows the state which attached the protective cover provided with the anticorrosion structure of the overhead wire support apparatus which concerns on 3rd Embodiment of this invention to the horizontal support | pillar. It is a side view which shows the state which attached the protective cover provided with the anticorrosion structure of the overhead wire support apparatus which concerns on 4th Embodiment of this invention to the horizontal support | pillar. It is a side view which shows the state which attached the protective cover provided with the anticorrosion structure of the overhead wire support apparatus which concerns on 5th Embodiment of this invention to the horizontal support | pillar, (A) is a side view in case a draining part is an acute-angle convex shape (B) is a side view when the draining portion has an acute concave shape, and (C) is a side view when the draining portion has an acute convex shape and a concave shape. It is a side view which shows the state which attached the protective cover provided with the anticorrosion structure of the overhead wire support apparatus which concerns on 6th Embodiment of this invention to the horizontal support | pillar, (A)-(C) schematically shows the attachment procedure of a protective cover. FIG. It is a top view which shows roughly the state which attached the protective cover to the insulated horizontal pipe of the conventional overhead wire support apparatus. It is a top view which shows roughly the state which expand | deployed the protective cover from the insulated horizontal pipe of the conventional overhead wire support apparatus.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
A tunnel 1 shown in FIG. 1 is a fixed structure (civil engineering structure) for passing a train through an underground such as a mountainside. A tunnel 1 shown in FIG. 1 is a single-line railway tunnel (single-line tunnel) that accommodates a track on which a train travels in one fixed structure. The tunnel 1 includes a semicircular arch portion 1 a that forms the upper half of the tunnel 1.

  The overhead line 2 is an overhead train line installed over the track. The overhead wire 2 has a trolley wire 2a that supplies a load current to the electric vehicle by sliding a sliding plate of a current collector (pantograph) of an electric vehicle such as an electric locomotive or a train, and a weight of the trolley wire 2a. There are provided an overhead wire 2b for supporting the trolley wire 2a and a feeder 2c for supplying electric power from the feeding substation to the trolley wire 2a so that the slackness (sag) is reduced.

  The overhead wire support device 3 is a device that supports the overhead wire 2. An overhead wire support device 3 shown in FIG. 1 is an in-tunnel train wire support device that is attached to the arch portion 1 a of the tunnel 1 and supports the overhead wire 2 in the tunnel 1. The overhead wire support device 3 includes a curved metal fitting 4, a horizontal support column 5, a protective cover 6, an insulator 7, support metal fittings 8A and 8B, an overhead wire fitting 9, and the like.

  The curved metal fitting 4 is a member that holds the trolley wire 2a of the overhead wire 2 in a normal position, and supports the ear or the like that holds the upper portion of the trolley wire 2a at the tip. The horizontal support 5 is a member that supports the overhead wire 2 and the curved metal fitting 4. The horizontal strut 5 is, for example, an insulating horizontal main material (insulated horizontal pipe) whose surface is insulated, and is a cladding tube or a general structural carbon steel pipe whose core surface is covered with fiber reinforced plastic (FRP). is there.

  The protective cover 6 shown in FIGS. 1 to 4 is a member that protects the surface of the horizontal column 5. As shown in FIGS. 1 and 2, the protective cover 6 is mounted between the horizontal support 5 and the overhead wire fitting 9 attached to the horizontal support 5. As shown in FIG. 4, the protective cover 6 is a sheet-like member (strip-like member) made of a fluororesin such as polytetrafluoroethylene having low friction, electrical insulation, and water repellency. The protective cover 6 functions as a protective material that prevents the insulating treatment layer on the surface of the horizontal support 5 and the anticorrosion treatment layer on the surface of the overhead wire fitting 9 shown in FIGS. 1 and 2 from being damaged and protects these surfaces. For example, as shown in FIG. 1, the protective cover 6 corresponds to a place where the horizontal support 5 is supported by the metal part 7c of the insulator 7 and a place where the horizontal support 5 supports the support metal 8A, 8B. These are mounted by being wound around the surface of the horizontal column 5. As shown in FIGS. 1 and 2, when the protective cover 6 is mounted between the horizontal support column 5 and the overhead wire fitting 9, the position of the protective cover 6 can be finely adjusted in the length direction. It is formed to have a length that protrudes about 2 to 3 mm from both ends of the overhead wire fitting 9. As shown in FIG. 4, the protective cover 6 is formed in a sheet shape when not attached, and both edges of the fluororesin sheet are formed in a convex shape in advance. The protective cover 6 is cut into a predetermined length (for example, substantially the same length as the outer periphery of the horizontal support 5) according to the outer diameter of the horizontal support 5, wound around the surface of the horizontal support 5 and attached. The protective cover 6 is formed with such a thickness that it is slightly compressed in the radial direction when tightened by the overhead wire fitting 9 and the adhesion to the overhead wire fitting 9 is improved.

  The insulator 7 shown in FIG. 1 is a member that insulates and supports the electrical conductor. The insulator 7 is an insulator that electrically insulates the tunnel 1 from the overhead wire 2 when the overhead wire 2 is supported by the tunnel 1. The insulator 7 shown in FIG. 1 is a support insulator which is a kind of insulating railroad insulator used when the horizontal column 5 is supported by the tunnel 1. The insulator 7 is composed of a main body part (porcelain part) 7a formed by applying glaze on the surface of a hard porcelain insulator, and a metal part joined to the outer surface of the head part of the main body part 7a and connected to a support. (Cap metal fitting) 7b, a metal fitting part (pin metal fitting) 7c joined to the inner surface of the head of the main body 7a and connected to a support, a base metal fitting part 7d for connecting the metal fitting part 7b and the metal fitting part 7c, etc. I have.

  The support metal fitting 8A is a metal fitting that supports the curved drawing metal fitting 4, and the support metal fitting 8B is a metal fitting that supports the overhead wire 2b of the overhead wire 2 and the feeder wire 2c. The support fitting 8A is an arm support fitting that supports the end portion (upper end portion) of the curved drawing fitting 4 on the side opposite to the side that grips the trolley wire 2a so as to be swingable in the vertical direction. The lower end portion is connected to the curved metal fitting 4. The support metal fitting 8B is a power / carriage wire support metal fitting for holding the overhead wire 2b and the feeder wire 2c, and the overhead wire is formed so that a gap is formed between the outer circumference surface of the overhead wire 2b and the feeder wire 2c. 2b and feeder 2c are supported. The support fittings 8A and 8B are, for example, general structural rolled steel materials, and a metal plating layer such as a hot dip galvanized layer is formed on the surface.

  The overhead wire fitting 9 shown in FIGS. 1 and 2 is various fittings used for a train track. The overhead wire fitting 9 is a corrosion-resistant electric train wire fitting whose surface is subjected to anticorrosion treatment. When used as an electric circuit facility, the overhead wire fitting 9 is used under a high voltage of 1500 V for a DC voltage and 20 to 25 kV for an AC voltage. As shown in FIG. 1, the overhead wire fitting 9 is a train wire fitting such as pipe bands for attaching the support fittings 8A, 8B and the like to the horizontal column 5, and constitutes a part of the overhead wire support device 3. As shown, the two-piece structure is separable. As shown in FIG. 2, the overhead wire fitting 9 includes clamping pieces 9a and 9b, insertion holes 9c and 9d, and the like. The overhead wire fitting 9 is formed with a metal plating layer such as a hot-dip galvanized layer on the entire surface of the holding pieces 9a and 9b and the inner peripheral surfaces of the insertion holes 9c and 9d.

  The sandwiching pieces 9a and 9b shown in FIG. 2 have a split structure that can be detachably attached to the horizontal support 5 and are members that sandwich the horizontal support 5. The sandwiching pieces 9a and 9b are both substantially the same structure, are substantially rectangular plate-like members, and have a substantially U-shaped cross section. The sandwiching pieces 9 a and 9 b are, for example, general structural rolled steel and the like, and the center portion in the length direction is curved outward along the outer peripheral surface of the horizontal column 5. A metal fitting 7b and support metal fittings 8A, 8B shown in FIG. 1 are fixed to the sandwiching pieces 9a, 9b on the outer surface by welding or the like. The insertion holes 9c and 9d are portions into which the fastening bolts 10a of the connecting member 10 are inserted. The insertion holes 9c are quadrangular through holes (square holes) formed at equal intervals near one end and the other end of the sandwiching piece 9a. On the other hand, the insertion holes 9d are circular through-holes (round holes) that are formed at two equal intervals at positions facing the insertion hole 9c near one end and the other end of the sandwiching piece 9b. It is. The overhead wire fitting 9 includes a connecting member 10 shown in FIG.

  The connecting member 10 shown in FIG. 2 is a member that detachably connects the holding piece 9a and the holding piece 9b of the overhead wire fitting 9. As shown in FIG. 2, the connecting member 10 includes a fastening bolt 10a, nuts 10b and 10c, a split pin 10d, a washer 10e, and the like. The fastening bolt 10a is a member that fastens the clamping piece 9a and the clamping piece 9b in a separable manner. The fastening bolt 10a is attached to the sandwiching pieces 9a and 9b in a state where the horizontal support 5 and the protective cover 6 are sandwiched between the sandwiching piece 9a and the sandwiching piece 9b. The fastening bolt 10a is, for example, a stainless steel having a corner portion 10f having a square cross-sectional shape that fits into the insertion hole 9c, a male screw portion 10g inserted into the insertion hole 9d, and a through hole 10h that passes through the male screw portion 10g. This is a round head bolt made of square root. The nuts 10b and 10c are members attached to the male screw portion 10g of the fastening bolt 10a. The split pin 10d is a member that prevents the nuts 10b and 10c from falling off, and is inserted into the through hole 10h of the male screw portion 10g of the fastening bolt 10a. The washer 10e is a member inserted between the nut 10b and the clamping piece 9b. When the nut 10b is rotated with respect to the fastening bolt 10a, the washer 10e prevents the corner of the bottom surface of the nut 10b from hitting the coating film on the surface of the sandwiching pieces 9a, 9b and preventing the coating film from being damaged.

  The anticorrosion structure 11 shown in FIGS. 1 to 4 is a structure that prevents corrosion of the overhead wire support device 3 that supports the overhead wire 2. As shown in FIG. 3, the anticorrosion structure 11 has a corrosion product C flowing out from the overhead wire fitting 9 due to rain water or tunnel leakage as the overhead wire fitting 9 of the overhead wire support device 3 is soiled and the corrosion of the overhead wire fitting 9 proceeds. It is dripped downward to prevent insulation deterioration of the horizontal support 5. As shown in FIGS. 1 to 4, the anticorrosion structure 11 includes a draining portion 11 a and the like.

  The draining portion 11 a is a portion that guides the corrosion product C flowing on the surface of the overhead wire support device 3 downward from the surface of the overhead wire support device 3. The draining portion 11 a is formed integrally with the protective cover 6 on the surface of the protective cover 6. The draining portion 11a is formed in a convex shape on the entire circumference of both end portions of the protective cover 6, and is a curved surface having a substantially U-shaped cross section as shown in FIG. The draining part 11a guides the corrosion product C flowing on the surface of the horizontal column 5 downward along the curved surface, and drops the corrosion product C downward from the horizontal column 5. For example, before cooling the sheet-like molten fluororesin extruded from the die of the melt extruder, the draining portion 11a is formed between a pair of forming rollers having a concave portion and a convex portion having the same shape as the draining portion 11a. The sheet-like molten fluororesin is passed through and formed on both edges of the sheet-like molten fluororesin.

Next, the attachment method of a protective cover provided with the anticorrosion structure of the overhead wire support apparatus which concerns on 1st Embodiment of this invention is demonstrated.
As shown in FIG. 4, the sheet-like protective cover 6 is cut to a length substantially the same as the outer diameter of the horizontal support column 5, and the outer peripheral surface of the horizontal support column 5 so that the draining portion 11a of the protective cover 6 is on the outside. Wrap this protective cover 6 around Next, as shown in FIG. 2 and FIG. 3, the overhead wire fitting 9 is sandwiched between the draining portion 11 a at one end of the protective cover 6 and the draining portion 11 a at the other end. The clamping pieces 9a and 9b are attached. Finally, the fastening bolt 10a of the connecting member 10 is inserted into the insertion holes 9c, 9d of the overhead wire fitting 9 shown in FIG. 2, and the nuts 10b, 10c and the washer 10e are attached to the fastening bolt 10a. The split pin 10d is attached, and the overhead wire fitting 9 is attached to the protective cover 6.

  For example, when the horizontal support 5 is finely adjusted with respect to the insulator 7 shown in FIG. 1, the fastening bolts 10a and nuts 10b and 10c of the overhead wire fitting 9 shown in FIG. The end of the column 5 is hit with a hammer or the like, and the horizontal column 5 is slightly moved horizontally. At this time, as shown in FIG. 3, the protective cover 6 is sandwiched between the holding pieces 9 a and 9 b of the overhead wire fitting 9 and the horizontal column 5, and the inner peripheral surface of the protective cover 6 and the outer periphery of the horizontal column 5 The frictional resistance between the outer peripheral surface of the protective cover 6 and the inner surfaces of the sandwiching pieces 9a and 9b is also reduced. For this reason, the horizontal support 5 is easily slid with respect to the sandwiching pieces 9a and 9b, the horizontal support 5 is easily moved horizontally with respect to the insulator 7, and the surfaces of the horizontal support 5 and the sandwiching pieces 9a and 9b are damaged. The protective cover 6 prevents it. After finely adjusting the position of the horizontal support 5, the connecting member 10 of the overhead wire 9 shown in FIG. 2 is tightened to fix the overhead wire 9 to the protective cover 6.

Next, the operation of the anticorrosion structure for the overhead wire support device according to the first embodiment of the present invention will be described.
For example, in the case where there are no draining portions 11 a at both ends of the protective cover 6 shown in FIGS. 1 to 4, when rainwater or tunnel leakage drops on the overhead wire fitting 9, corrosion generation is generated on the surface of the overhead wire fitting 9. The object C flows out to the protective cover 6 due to this rainwater or tunnel leakage. For this reason, the corrosion product C flows out from the overhead wire fitting 9 to the horizontal support 5 through the protective cover 6, and the electrical insulation of the horizontal support 5 is deteriorated. As a result, for example, a conductive circuit is formed by the left and right overhead wire fittings 9 and the horizontal support 5 shown in FIG. 1, and the electrical insulation of the horizontal support 5 is lowered. On the other hand, when the draining part 11a exists in the both ends of the protective cover 6 shown in FIGS. 1-4, as shown in FIG. 3, the corrosion product C which flows out from the protective cover 6 is shown in FIG. 3 by the draining part 11a. Guided below. As a result, the corrosion product C drops downward from the draining portion 11a, and the draining portion 11a prevents the corrosion product C from flowing out from the protective cover 6 to the horizontal support column 5.

The anticorrosion structure of the overhead wire support device according to the first embodiment of the present invention has the following effects.
(1) In the first embodiment, the drainage part 11 a guides the corrosion product C flowing on the surface of the overhead wire support device 3 downward from the surface of the overhead wire support device 3. For this reason, for example, it is possible to prevent the corrosion product C flowing out due to rain water, tunnel leakage, or the like from adhering to the horizontal support 5 and corroding the horizontal support 5. In addition, for example, it is possible to prevent the corrosion product C from adhering to an insulator such as the horizontal support 5 and the insulation resistance of the insulator from being lowered. As a result, insulation deterioration of the overhead wire support device 3 can be prevented and maintenance costs can be reduced.

(2) In the first embodiment, the protective cover 6 that is mounted between the horizontal support 5 and the overhead wire fitting 9 attached to the horizontal support 5 of the overhead support device 3 and protects the surface of the horizontal support 5 is provided. The overhead wire support device 3 is provided, and a draining portion 11 a is formed on the surface of the protective cover 6. For this reason, the corrosion product C can be dripped downward by the draining part 11a, and the draining part 11a can prevent the corrosion product C from flowing out from the protective cover 6 to the horizontal support column 5.

(3) In the first embodiment, the protective cover 6 is wound around the surface of the horizontal support 5 and attached. For this reason, the protective cover 6 can be easily attached to the horizontal support 5 by simply cutting the protective cover 6 to an arbitrary length and winding it around the horizontal support 5. Can be easily prevented by the draining portion 11a.

(4) In the first embodiment, the protective cover 6 is made of a fluororesin. For this reason, the frictional resistance between the outer peripheral surface of the horizontal support column 5 and the inner peripheral surface of the protective cover 6 and the frictional resistance between the outer peripheral surface of the protective cover 6 and the inner surface of the overhead wire 9 are reduced, and horizontal The position of the horizontal support 5 can be easily finely adjusted by easily moving the support 5 in the length direction.

(5) In this 1st Embodiment, the draining part 11a is formed in convex shape in the perimeter of the both ends of the protective cover 6. FIG. For this reason, corrosion of the horizontal column 5 can be prevented by the draining portion 11a having a simple structure, and insulation deterioration of the horizontal column 5 can be prevented. Moreover, since the draining part 11a can be easily formed in the outer peripheral surface of the protective cover 6, cost reduction can be achieved.

(Second Embodiment)
In the following, the same parts as those shown in FIGS. 1 to 4 are denoted by the same reference numerals and detailed description thereof is omitted.
A protective cover 6 shown in FIG. 5 is a fluororesin tubular member having the same appearance as the protective cover 6 shown in FIGS. Unlike the structure in which the protective cover 6 shown in FIG. 5 is wound around and mounted on the surface of the horizontal support 5 like the protective cover 6 shown in FIGS. The The protective cover 6 is formed to have a predetermined length so as to protrude from the both ends of the overhead wire fitting 9 by about 2 to 3 mm when inserted between the horizontal support column 5 and the overhead wire fitting 9. . The draining part 11a shown in FIG. 5 is an isolator that, for example, immerses a rubber mold filled with a fluororesin in a high-pressure container, presses the liquid in the high-pressure container as a medium and press-molds the molded product from the rubber mold. It is formed integrally with the protective cover 6 by static molding.

Next, a method for attaching a protective cover having an anticorrosion structure for an overhead wire support device according to a second embodiment of the present invention will be described.
As shown in FIG. 5, the protective cover 6 is fitted into the horizontal support column 5 so that the outer peripheral surface of the horizontal support column 5 and the inner peripheral surface of the protective cover 6 are in close contact with each other. The holding pieces 9a and 9b of the overhead wire fitting 9 are attached between the draining portions 11a. Next, the holding pieces 9 a and 9 b of the overhead wire fitting 9 are fastened by the connecting member 10, and the overhead wire fitting 9 is attached to the protective cover 6. For example, when the horizontal support 5 is finely adjusted with respect to the insulator 7 shown in FIG. 1, the connecting member 10 of the overhead wire 9 is slightly loosened, and the end of the horizontal support 5 is hit with a hammer or the like to slightly adjust the horizontal support 5. Move horizontally. After finely adjusting the position of the horizontal support 5, the connecting member 10 of the overhead wire fitting 9 is tightened to fix the overhead wire fitting 9 to the protective cover 6.

The anticorrosion structure of the overhead wire support device according to the second embodiment of the present invention has the following effects in addition to the effects of the first embodiment.
In the second embodiment, the protective cover 6 is fitted and attached to the surface of the horizontal column 5. For this reason, the protective cover 6 can be easily attached to the horizontal support column 5 by simply fitting the inner peripheral surface of the protective cover 6 to the outer peripheral surface of the horizontal support column 5, and the corrosion product C is applied to the horizontal support column 5. Can be easily prevented by the draining portion 11a.

(Third embodiment)
The protective cover 6 shown in FIG. 6 is attached to the horizontal support 5 by being wound or fitted in the same manner as the protective cover 6 shown in FIGS. The draining portion 11a shown in FIG. 6 has a different cross-sectional shape from the draining portion 11a shown in FIGS. 1 to 5 and is formed in a concave shape on the entire periphery of both end portions of the protective cover 6, and the sectional shape is substantially U-shaped. It is a curved surface.

Next, a method for attaching a protective cover having an anticorrosion structure for an overhead wire support apparatus according to a fourth embodiment of the present invention will be described.
As shown in FIG. 6, the holding piece 9 a of the overhead wire 9 shown in FIG. 2 is formed so that a slight gap is formed between the outer peripheral surface of the horizontal column 5 and the inner surfaces of the holding pieces 9 a and 9 b of the overhead wire 9. 9b are temporarily tightened by the connecting member 10, and the overhead wire fitting 9 is attached to the horizontal column 5. Next, the protective cover 6 is fitted from the end of the horizontal column 5 shown in FIG. 1, and the protective cover 6 is inserted from the gap between the outer peripheral surface of the horizontal column 5 and the inner surfaces of the holding pieces 9a and 9b shown in FIG. To do. A convex draining portion 11a is formed on the outer peripheral portion of the protective cover 6 shown in FIG. For this reason, when the protective cover 6 is to be inserted from the gap between the outer peripheral surface of the horizontal column 5 and the inner surfaces of the holding pieces 9a and 9b, the convex draining portion 11a interferes with the ends of the holding pieces 9a and 9b. Thus, the protective cover 6 cannot be inserted from the gap between the outer peripheral surface of the horizontal column 5 and the inner surfaces of the sandwiching pieces 9a and 9b. On the other hand, since the concave draining portion 11a is formed on the outer peripheral surface of the protective cover 6 shown in FIG. 6, the draining portion 11a does not interfere with the ends of the sandwiching pieces 9a and 9b, and the outer periphery of the horizontal column 5 The protective cover 6 is easily inserted from the gap between the surface and the inner surfaces of the sandwiching pieces 9a and 9b. Next, the clamping pieces 9 a and 9 b of the overhead wire fitting 9 shown in FIG. 2 are finally tightened by the connecting member 10, and the overhead wire fitting 9 is attached to the protective cover 6.

The anticorrosion structure of the overhead wire support device according to the third embodiment of the present invention has the following effects in addition to the effects of the first and second embodiments.
In the third embodiment, the draining portion 11 a is formed in a concave shape on the entire circumference of both end portions of the protective cover 6. For this reason, the holding pieces 9a and 9b of the overhead wire fitting 9 are slightly loosened by the connecting member 10 so that a slight gap is formed between the outer peripheral surface of the horizontal column 5 and the inner surfaces of the holding pieces 9a and 9b of the overhead wire fitting 9. In this state, the protective cover 6 can be easily inserted from this gap. As a result, the mounting operation of the protective cover 6 and the fastening operation of the overhead wire fitting 9 can be performed in a short time, and the work load can be reduced.

(Fourth embodiment)
The protective cover 6 shown in FIG. 7 is attached to the horizontal support 5 by being wound or fitted in the same manner as the protective cover 6 shown in FIGS. 7 is different from the draining portion 11a shown in FIGS. 1 to 6, and is formed in a convex shape and a concave shape on the entire circumference of both ends of the protective cover 6 as shown in FIG. The shape is a substantially U-shaped curved surface. As shown in FIG. 7, the draining portion 11 a has convex portions formed at both ends of the protective cover 6, and the concave portion is continuous with the convex portion and is formed inside the convex portion. Yes. The fourth embodiment has the same effects as the first embodiment and the second embodiment.

(Fifth embodiment)
The protective cover 6 shown in FIG. 8 is attached to the horizontal support 5 by being wound or fitted in the same manner as the protective cover 6 shown in FIGS. The draining portion 11a shown in FIG. 8 (A) is a flat inclined surface having a substantially V-shaped cross section, with the apex formed on the entire circumference of both ends of the protective cover 6 at an acute angle. The draining portion 11a shown in FIG. 8 (B) is a flat inclined surface having a substantially concave V-shaped cross section with valleys formed at the entire circumference of both ends of the protective cover 6 at an acute angle. The draining portion 11a shown in FIG. 8C has an acute convex shape at the top and an acute convex shape at the valley at the entire periphery of both ends of the protective cover 6, and has a substantially V-shaped cross section. It is a flat inclined surface. As for the draining part 11a shown in FIG.8 (C), the convex part is formed in the both ends of the protective cover 6, and a concave part is formed inside this convex part continuously with this convex part. Yes. The fifth embodiment has the same effects as those of the first to fourth embodiments.

(Sixth embodiment)
The protective cover 6 shown in FIG. 9 is attached to the horizontal support 5 by being wound or fitted in the same manner as the protective cover 6 shown in FIGS. The draining portion 11a shown in FIG. 9 is formed in a convex shape on the entire periphery of both end portions of the protective cover 6, and is a curved surface having a substantially U-shaped cross section. The draining portion 11a is elastically deformable at its convex portion so that the protective cover 6 can be inserted into the gap between the outer peripheral surface of the horizontal support column 5 and the inner surfaces of the holding pieces 9a and 9b of the overhead wire fitting 9. As shown in FIG. 9A, when the draining portion 11a comes into contact with the side surfaces of the holding pieces 9a and 9b of the overhead wire fitting 9, it is elastically deformed and compressed. As shown in FIG. 9B, when the draining portion 11a is sandwiched between the outer peripheral surface of the horizontal support column 5 and the inner surfaces of the clamping pieces 9a and 9b of the overhead wire 9, the compressed state is maintained. It passes through the gap between them. As shown in FIG. 9 (C), the draining portion 11a is elastically deformed and extended when it comes out from the gap between the outer peripheral surface of the horizontal support column 5 and the inner surfaces of the holding pieces 9a and 9b of the overhead wire fitting 9. Restore the shape. The draining portion 11a shown in FIG. 9 is designed so that the protective cover 6 can be easily inserted into the gap between the outer peripheral surface of the horizontal column 5 and the inner surfaces of the holding pieces 9a and 9b of the overhead wire 9. Unlike the draining portion 11a shown in FIG. 8, the curved surface is formed with a small inclination angle. The sixth embodiment has the same effect as the first embodiment.

(Other embodiments)
The present invention is not limited to the embodiment described above, and various modifications or changes can be made as described below, and these are also within the scope of the present invention.
(1) In this embodiment, the case where the anticorrosion structure 11 is applied to the overhead wire support device 3 used in an electric circuit facility such as a train line facility has been described as an example. The anticorrosion structure 11 can also be applied to the overhead wire support device. In this embodiment, the case where the anticorrosion structure 11 is applied to the overhead wire support device 3 used in the tunnel section has been described as an example. However, the overhead wire support device 3 used in the light section other than the tunnel section is protected against corrosion. Structure 11 can also be applied. For example, the anticorrosion structure 11 can also be applied to an overhead wire support device used under a viaduct. Furthermore, in this embodiment, the case where the anticorrosion structure 11 is applied to the protective cover 6 mounted between the horizontal support column 5 and the overhead wire fitting 9 has been described as an example, but the protective cover mounted between them is described. It is not limited to six. For example, in a movable bracket of an overhead wire support device that supports the overhead wire 2 so as to be movable in the length direction, the protection that is mounted between the brace fitting that supports the curved metal fitting 4 and the dropper that supports the brace bracket. The anticorrosion structure 11 can also be applied to the cover.

(2) In this embodiment, in this embodiment, the case where the overhead wire fitting 9 is a pipe band has been described as an example. However, an ear for gripping the trolley wire 2a, a clip for gripping the overhead wire or the auxiliary overhead wire, The present invention can also be applied to an arm portion of a movable bracket, such as an anti-vibration pipe portion, an anti-vibration device or a curving device. Moreover, in this embodiment, although the case where the attachment target object was the horizontal support | pillar 5 was mentioned as an example and demonstrated, this invention is applicable also to a vertical support | pillar or an inclination support | pillar. Furthermore, in this embodiment, the case where the drainage portion 11a prevents the corrosion product C from flowing out from the overhead wire fitting 9 toward the horizontal support column 5 is described as an example. It is also possible to prevent the corrosion product C from flowing out by the draining portion 11a.

(3) In the first embodiment and the third to sixth embodiments, the case where the convex draining portions 11a are formed at both ends of the protective cover 6 has been described as an example. The height of the draining portion 11a can be made lower than the height of the other draining portion 11a. In this case, the protective cover 6 is relatively easily inserted into the gap between the outer peripheral surface of the horizontal support column 5 and the inner surfaces of the holding pieces 9a and 9b of the overhead wire fitting 9 from the side of the low drainage portion 11a. be able to. In the fourth embodiment and the fifth embodiment, the case where the convex portions are arranged at both ends of the protective cover 6 and the concave portions are arranged inside the convex portions has been described as an example. It is also possible to arrange concave portions at both ends of the protective cover 6 and arrange convex portions inside the concave portions.

DESCRIPTION OF SYMBOLS 1 Tunnel 1a Arch part 2 Overhead wire 2a Trolley wire 2b Bowed wire 2c Wire feeder 3 Support device 4 Curved fitting 5 Horizontal support 6 Protection cover 7 Insulator 7a Body part 7b, 7c Metal part 7d Base metal part 8A, 8B Support metal 9 Metal fittings 9a, 9b Clamping pieces 9c, 9d Insertion hole 10 Connecting member 10a Fastening bolt 10b, 10c Nut 10d Split pin 10e Washer 11 Corrosion-proof structure 11a Draining part

Claims (6)

An anticorrosion structure for an overhead wire support device that prevents corrosion of the overhead wire support device that supports the overhead wire,
A drainer for guiding a corrosion product flowing on the surface of the overhead wire support device downward from the surface of the overhead wire support device;
The anticorrosion structure of the overhead wire support device characterized by In the anticorrosion structure of the overhead wire support device according to claim 1,
The overhead wire support device includes a protective cover that is mounted between the horizontal support and the overhead wire fitting attached to the horizontal support of the overhead wire support device and protects the surface of the horizontal support,
The draining part is formed on the surface of the protective cover;
The anticorrosion structure of the overhead wire support device characterized by In the anticorrosion structure of the overhead wire support device according to claim 2,
The protective cover is wound around and mounted on the surface of the horizontal support;
The anticorrosion structure of the overhead wire support device characterized by In the anticorrosion structure of the overhead wire support device according to claim 2,
The protective cover is fitted and mounted on the surface of the horizontal support;
The anticorrosion structure of the overhead wire support device characterized by In the anticorrosion structure of the overhead wire support device according to any one of claims 2 to 4,
The protective cover is made of a fluororesin;
The anticorrosion structure of the overhead wire support device characterized by In the anticorrosion structure of the overhead wire support device according to any one of claims 2 to 5,
The draining portion is formed in a convex shape and / or a concave shape on the entire circumference of both end portions of the protective cover,
The anticorrosion structure of the overhead wire support device characterized by

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