JP6776012B2 - Overhead line support device in tunnel - Google Patents

Description

The present invention relates to a suspension wire support device for supporting a suspension wire so that the angle can be changed in the extension direction while ensuring a predetermined insulation separation even in a narrow space on the ceiling portion in a tunnel in the middle of a train track. is there.

As shown in FIG. 5, in order to support the train line while maintaining a predetermined insulation separation in the tunnel section, the support insulator G is attached to the fixing metal fittings S fixed to both sides of the tunnel ceiling C with anchor bolts. Both ends of the support rod P are connected to both ends of the support insulator G to support the support rod P horizontally, and the suspension wire support device 13 is attached to the support rod P. The support rod P is configured to be retractable in a nested manner, and the height of the support rod P can be changed by selectively inserting a fixing pin Pb into a plurality of length adjusting holes Ph arranged in the longitudinal direction to change the length. Can be adjusted. Since the tunnel before electrification is limited to the minimum necessary cross-sectional area, the suspension wire M pressurized with extra high voltage is kept at a predetermined insulation interval from the tunnel ceiling C and a sufficient height is secured. On the other hand, since there is a vehicle limit limit on the lower side of the support rod P, the suspension wire M cannot be supported on the lower side of the support rod P. Further, since the direction of the support rod P is fixed at the mounting position of the left and right support insulators G on the ceiling portion C of the tunnel, the intersection angle of the support rod P is adjusted according to the extension direction of the train line to be installed later. Can not do it. It is not realistic to determine the fixed position of the support rod P by assuming the extension direction of the suspension line M in advance because of the zigzag deviation of the train line. Since the suspension wire support device attached to the support rod P is subject to installation restrictions, the linear support type support bracket used at a position where the extension direction of the suspension wire M is orthogonal to the support rod P and Angled support type support metal fittings used at locations where the extension direction of the suspension wire M intersects the support rod P at an inclined angle are used properly.
Conventionally, as shown in FIG. 6, the linear support type support metal fitting 13 has a support pulley 14 on which a suspension wire M is mounted and rotatably supported by a support rod P, and a suspension wire 14 between the support pulley 14. It includes a detachment prevention member 15 that surrounds M.
As shown in FIG. 7, the angled support type support device 16 is fixed on the clamp 17 for gripping the support rod P and the suspension wire M, and the upper part is closed by the detachment prevention pin 19. It is provided with a substantially U-shaped receiver 18. The front and rear doorways of the receiver 18 are fixed to the clamp 17 at an angle of 45 ° in the horizontal direction with respect to the length direction of the support rod P in order to receive the suspension wire M in the extending direction.
Further, there is a linear support type suspension wire support device described in Patent Document 1. This overhead wire support device fixes the support rod almost horizontally to a substantially chevron-shaped arm metal that is fixed along the curved surface in the center of the tunnel ceiling via a support insulator, and is placed in the middle of the support rod. A support bracket whose mounting position can be changed is mounted. A bracket for supporting the support pulley is erected on the support metal fitting with an upward inclination, and a T-shaped detachment prevention member is provided on the support metal fitting.

JP-A-11-192862

In the conventional linear support type suspension wire support device, since the support pulley 14 is directly pivotally supported by the support rod P, the installation location where the extension direction of the suspension wire M is supported at a right angle to the support rod P. Limited to application to. In the angled support type support device, since the receiver 18 on which the suspension wire M is placed is fixed to the support rod P via the clamp 17, the extension direction of the suspension wire M is specified to be inclined with respect to the support rod P. It is limited to the application to the installation place supported by the angle of. Therefore, it is forced to make an appropriate selection according to the installation location, and handling is troublesome. It is difficult to mount the suspension wire M on the support pulley 14 or the receiver 18 at an installation location where the selection is incorrect or the extension direction of the suspension wire M intersects the support rod P at a right angle or at an angle other than a specific angle. Or, the suspension wire M bends at the entrance / exit position of the support pulley 14 and the front-rear position of the receiver 18, and an unreasonable load is applied to the suspension wire M. Since the receiver 18 only carries the suspension wire M, it hinders the movement of the suspension wire M in the extending direction. In the support device of Patent Document 1, in addition to the above-mentioned difficulties, since the bracket rises from the upper part of the support metal fitting, the support position of the support pulley becomes high, and the upper space cannot be effectively utilized.
Therefore, according to the present invention, the suspension wire can be supported without being restricted in the extension direction, the suspension wire is not overloaded, the installation workability is good, and the narrow upper space can be effectively utilized. The subject is to provide an overhead wire support device.

In order to solve the above problems, in the present invention, the suspension wire support device 1 is mounted on the support rod P horizontally supported via the support insulator G from the left and right sides of the ceiling portion C of the tunnel, and the train line is installed in the tunnel. The suspension wire M is supported for erection. The mounting member 2 is fixed to the intermediate portion of the support rod P. The suspension wire M is movably mounted on the pair of supporting pulleys 4 and 4 facing each other in the extending direction. Support pulleys 4 and 4 are pivotally supported on the bracket 10, respectively, and the support rods P are sandwiched between them so as to face each other, and the mutual connecting portions 9 are rotatably supported under the mounting member 2. The feed direction of the suspension line M of the support pulley 4 is made to follow the extension direction.

In the present invention, since the bracket rotates relative to the support rod in the horizontal direction, the support pulley follows the extension direction of the suspension line, and can be installed without being restricted by the extension direction of the suspension line. The support pulley allows the movement of the overhead wire smoothly, the suspension wire is not overloaded, the installation workability is good, and the narrow upper space can be effectively utilized.

It is a perspective view of the suspension wire support device which concerns on this invention. It is a front view of the suspension wire support device of FIG. It is a side view of the suspension wire support device of FIG. It is a top view of the suspension wire support device of FIG. It is a front view of the installation state of the conventional overhead wire support device. It is a perspective view of the conventional overhead wire support device. It is a perspective view of another conventional overhead wire support device.

An embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, the suspension wire support device 1 is fixed on the support rod P. The suspension wire support device 1 has a mounting member 2 for mounting on the intermediate portion of the support rod P, a support member 3 rotatably supported by the lower end portion of the mounting member 2, and a shaft rotatably attached to the support member 3. It is provided with a support pulley 4 to be supported. The mounting member 2 has a mounting block 5 having a substantially rectangular shape, and a screw shaft 7 projecting from a lower end portion of the mounting block 5 via a step portion 6. Fitting holes 5a through which the support rod P penetrates are opened on the front and rear side surfaces of the mounting member 2. Further, on the side portion of the mounting block 5, a plurality of adjusting holes 5b for penetrating the fixing pin Pb corresponding to the adjusting holes Ph of the support rod P are provided side by side. A set nut 8 is screwed onto the screw shaft 7.

The support member 3 has a horizontally rotatable swivel plate 9 which is prevented from coming off by a set nut 8 screwed to a screw shaft 7 at the lower end of the mounting member 2, and a support rod P is perpendicular to both ends of the swivel plate 9. It is provided with a pair of brackets 10 and 10 that stand up against each other. Each bracket 10 is composed of a pair of bracket pieces 10a and 10a facing each other in the direction perpendicular to the extension line, and has the same height on a horizontal rotation axis 11a extending between the support pulleys 4 on which the suspension wire M is movably mounted in the extension direction. The shaft is rotatably supported at the vertical position. Since the support pulley 4 rises from the swivel plate 9 below the mounting block 5, the suspension wire M can be placed on the support pulley P if it exceeds the height position of the support rod P, and the distance from the tunnel ceiling is as large as possible. Can be taken large. The upper ends of the pair of bracket pieces 10a and 10a are closed by a bolt 12a for preventing the suspension wire M from coming off.

In this suspension wire support device, the swivel plate 9 of the support member 3 is inserted into the screw shaft 7 of the mounting member 2 in advance to prevent it from coming off with the set nut 8, and the bolt 12a is removed. The support rod P is inserted into the fitting hole 5a of the mounting member 2, and while adjusting the length of the support rod P, the adjustment hole 5b and the adjustment hole Ph are matched, and the fixing pin Pb is passed through them to prevent them from coming off. The suspension wire M is placed on the support pulley 4, and the bolts 12a are inserted into the brackets 10 and 10 to prevent them from coming off. Since the support member 3 rotates horizontally around the screw shaft 7 with respect to the mounting member 2, the support pulley 4 can be easily matched with the suspension wire M, and the suspension wire M can be easily placed and suspended. Even if the wire extension direction of the overhead wire M is not perpendicular to the support rod P, workability is good, and the support state without a bent portion is maintained following the wire extension direction of the suspension wire M. Since the bracket 10 rises vertically from the lower end position of the mounting member 2, that is, the position below the support rod P, the vertical position of the support pulley 4 holds the suspension wire M even if the space above the support rod P is limited. Can be loaded and supported. The suspension line M is pulled in the extension direction due to the passage of a train or expansion and contraction of the suspension line M due to temperature changes, but it is reasonably sent by the support pulley 4 and the bolt 12a prevents it from falling off from the support pulley 4. ..

1 Suspension wire support device 2 Mounting member 3 Support member 4 Support pulley 5 Mounting block 5a Fitting hole 5b Adjustment hole 7 Screw shaft 8 Stop nut 9 Swivel plate 10 Bracket 12a Bolt C Ceiling S Fixing bracket G Support insulator P Support rod Pb Fixing pin Ph adjustment hole

Claims (2)

In a suspension line support device that is attached to support rods that are horizontally supported via support insulators on both sides of the ceiling of the tunnel and supports the suspension line to erection the train line in the tunnel.
A mounting member fixed to the intermediate portion of the support rod and
A pair of opposing support pulleys that movably mount the suspension wire in the extension direction,
Respectively pivotally supported rotatably to the support pulley, a pair of brackets you opposed across said support rod,
The pair of connecting between the bottom of the bracket, comprising a connecting portion which is rotatably supported in the horizontal direction in the lower portion of the mounting member,
An in-tunnel suspension wire support device characterized in that the feed direction of the suspension wire of the support pulley follows the extension direction. The support rod is configured so that it can be expanded and contracted in a nesting manner by selectively inserting fixing pins into a plurality of length adjusting holes arranged in the longitudinal direction.
The suspension wire support device in a tunnel according to claim 1, wherein the mounting member is provided with a pin hole through which the support rod is penetrated and the fixing pin can be inserted together with a length adjusting hole of the support rod.

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