JP5258043B2 - Tunnel support system for tunnel - Google Patents

Description

  The present invention relates to a support device that supports an overhead wire while ensuring a required height, a separation from a wall surface, and an angle with respect to a horizontal plane in a narrow tunnel.

As an overhead wire support device that supports two rigid body wires with a sufficient insulation interval in a narrow space in a tunnel and facilitates fine adjustment of the support position, for example, a device described in Patent Document 1 is known. Yes. This is shown in FIGS.
In the overhead wire support device 31, the receiving metal fitting 33 and the base metal fitting 34 are fixed to the ceiling of the tunnel T by the anchor bolt 32. An insulator 35 is fixed under the base metal 34, and an overhead wire support metal 36 is fixed under the insulator 35. A rigid body wire 41 is supported on the overhead wire support bracket 36. The rigid body wire 41 includes an aluminum frame 42 and a trolley wire 43. The base metal fitting 34 is provided with a bolt insertion hole 34a through which the anchor bolt 32 passes through with play. The lower surface of the receiving metal fitting 33 is formed on a cylindrical surface 33a. The base metal 34 is provided with an arc concave surface 34b that comes into surface contact with the cylindrical surface 33a of the receiving metal fitting 33, and the fixing angle with respect to the receiving metal fitting 33 is set to the cylindrical surface 33a in the relative free movement range between the bolt insertion hole 34a and the anchor bolt 32. Adjustable around. By adjusting the angle of the overhead wire support bracket 36 with respect to the receiving bracket 33 integrally with the base bracket 34, the support position of the pair of rigid overhead wires 41 can be adjusted around the cylindrical surface 33a of the sitting bracket 33.
Japanese Patent Laid-Open No. 2005-8040

In the conventional overhead wire support device described above, the cant angle of the overhead wire is adjusted by relative rotation between the receiving metal fitting 33 and the base metal fitting 34 in the immediate vicinity of the ceiling. The trolley 43 is in a lower position at a considerable interval with the insulator 35 interposed from the relative rotation portion. For this reason, the radius of rotation of the overhead wire support fitting 36 at the time of adjusting the cant angle becomes relatively large, and the displacement of the overhead wire support fitting 36 in the lateral direction is increased. In a narrow tunnel, if the lateral displacement becomes large, it becomes impossible to secure an insulation separation between the tunnel wall surface and the overhead wire support bracket 36.
Moreover, the shape of the overhead wire support bracket 36 is complicated because the rigid body wire 41 is pressed down, and the cost is increased in the cutting process. For this reason, it manufactures by casting in consideration of manufacturing cost. Because of casting, it is necessary to manufacture from a wooden mold every time the shape of the overhead wire support metal fitting 36 changes depending on the situation of the installation site, which contributes to an increase in cost and prolongation of the manufacturing period.
Therefore, in the invention according to this application, the cant angle can be adjusted by a relatively small displacement of the overhead wire support bracket in the left-right direction, and it is easy to ensure an insulation separation between the tunnel wall surface and the overhead wire support bracket. An object of the present invention is to provide an overhead wire support device for a tunnel that can be manufactured at a reasonable cost.

In order to solve the above-mentioned problems, the overhead wire support device for a tunnel according to the present invention includes a pair of insulators 4 whose upper part is fixed to the lower surface of the ceiling of the tunnel T, and an insulator support plate that connects between the lower ends of the pair of insulators 4 5, an overhead wire support plate 6 supported on the center upper portion of the lever support plate 5 via a pedestal 7, and a fastening bolt 8 that penetrates the lever support plate 5, the pedestal 7, and the overhead wire support plate 6 and tightens them. It has. The pair of insulators 4 are columnar and are provided at a predetermined mutual interval in the extending direction of the overhead wire so as to extend downward from the ceiling. In the pedestal 7, the upper surface on which the overhead wire support plate 6 is mounted is a cylindrical surface 7 a having an axis in the extending direction of the overhead wire. The overhead wire support plate 6 is supported at the center by a pedestal 7 on the insulator support plate 5, extends to the left and right in the direction orthogonal to the extension of the overhead wire, and supports the rigid overhead wires 41 at the lower portions of the left and right symmetrical positions. The overhead wire support plate 6 has an arc concave surface 6a in surface contact with the cylindrical surface 7a of the pedestal 7 and a bolt hole 6c through which the fastening bolt 8 passes with play. Accordingly, the overhead wire support plate 6 can adjust the fixing angle with respect to the pedestal 7 around the cylindrical surface 7a in the relative free movement range of the bolt hole 6c and the fastening bolt 8, and thereby the support position of the pair of left and right rigid overhead wires 41 can be adjusted. The angle can be adjusted around the cylindrical surface 7 a of the pedestal 7.
The insulator support plate 5 has a flat plate shape at both ends, and has attachment portions 5a that are fixed to the lower surface of the insulator 4 by fixing bolts 9. The intermediate portion is a receiving seat that is parallel to the attachment portion 5a and has a different height. The seat 5b can be formed so as to be formed by press molding.

According to the apparatus of the invention relating to this application, since the relative rotation part of the overhead wire support plate 6 and the base 7 is arranged below the insulator 4, the rotation radius of the overhead wire support plate 6 when adjusting the cant angle is relatively small. Therefore, the horizontal displacement in the horizontal direction is small, and the insulation separation between the tunnel wall surface and the overhead wire support fitting 6 can be relatively easily ensured in the narrow tunnel T.
In addition, the insulator support plate 5 is formed of a flat plate member, and attachment portions 5a fixed to the lower surface of the insulator 4 by fixing bolts 9 are provided at both ends, and the height is parallel to the attachment portion 5a and has a different height. If the seat portion 5b is provided in the intermediate portion, there is an effect that the seat portions 5b having different heights can be manufactured relatively inexpensively by press molding.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a tunnel overhead wire support device according to the present invention, FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is a sectional view taken along line III-III in FIG.

  A plurality of overhead wire support devices 1 are fixed to the ceiling of the tunnel T at a distance from each other in the extension direction of the overhead wire (the traveling direction of the train). A pair of rigid overhead wires 41 are supported along the plurality of support devices 1 at the left and right side lower portions in FIG. The rigid body wire 41 includes an aluminum frame 42 that is a long mold material that is electrically connected to each other at longitudinal ends, and a trolley wire 43 that is gripped by the lower portion of each aluminum frame 42.

  The overhead wire support device 1 is an insulator support that connects between a lower end of the insulator 4 and an insulator mounting bracket 2 fixed to the ceiling of the tunnel T by an anchor bolt 3, a pair of columnar insulators 4 supported at the upper end by the insulator mounting bracket 2. Fastening bolts 8 that pass through the plate 5 and the insulator support plate 5 via the pedestal 7 and support the rigid body wire 41, the insulator support plate 5, the pedestal 7 and the overhead wire support plate 6 and tighten them. It has.

  The pair of insulators 4 is supported by the insulator mounting bracket 2 at a predetermined interval in the extending direction of the overhead wire, and has a fixed flange 4a at the lower end.

  The insulator support plate 5 is formed by bending an elongated rectangular flat plate material, and is disposed so as to extend in the extending direction of the overhead wire as shown in FIG. The insulator support plate 5 has flat plate-like attachment portions 5a at both ends, and has a flat plate-like seat portion 5b at a lower portion and parallel to the attachment portion 5a at the intermediate portion. A bent portion 5c formed by press molding is provided between the attachment portion 5a and the receiving portion 5b. That is, the seat portion 5b is configured to be capable of being formed by press molding while changing the height position according to the conditions of the installation location. The insulator support plate 5 is fixed to the lower surface of the insulator flange 4a by fixing bolts 9 at the attachment portions 5a at both ends.

  As shown in FIG. 1, the overhead wire support plate 6 is supported at a central portion on a receiving portion 5 b of the insulator support plate 5 via a pedestal 7, extends in the left and right directions, and has a rigid overhead wire 41 at the lower portion of the left and right symmetrical positions. Support.

  The pedestal 7 has a flat plate-like lower surface that overlaps with the receiving portion 5b of the lever support plate 5, and an upper surface that is a cylindrical surface 7a that has an axial center along the extending direction of the overhead wire.

  As shown in FIG. 1, the overhead wire support plate 6 has an arc concave surface 6a in surface contact with the cylindrical surface 7a of the pedestal 7 and an arc convex surface 6b on the opposite side, and a bolt hole through which the fastening bolt 8 passes with play. 6c, the fixing angle with respect to the pedestal 7 can be adjusted in the relative free movement range between the bolt hole 6c and the tightening bolt 8 so as to be indicated by an imaginary line around the cylindrical surface 7a. The cant angle of the overhead wire can be adjusted by adjusting the fixed angle of the overhead wire support plate 6 with respect to the base 7 around the cylindrical surface 7a.

  A holding washer 10 having an arc concave surface 10a in surface contact with the arc convex surface 6b of the overhead wire support plate 6 is overlaid on the arc convex surface 6b of the overhead wire support plate 6, and after adjusting the cant angle of the overhead wire, the clamping bolt 8 The support plate 5, the pedestal 7, and the overhead wire support plate 6 are fastened together with fastening bolts 8.

It is a front view of the overhead wire support apparatus for tunnels concerning this invention. It is a side view of the overhead wire support apparatus for tunnels of FIG. It is the III-III sectional view in FIG. It is a front view of the conventional overhead wire support apparatus for tunnels. It is a side view of the overhead wire support apparatus for tunnels of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Overhead support apparatus 2 Insulator attachment metal fitting 3 Anchor bolt 4 Insulator bolt 4 Insulator 4a Flange 5 Insulator support plate 5a Attachment part 5b Receiving seat part 6 Overhead support plate 6a Arc concave surface 6b Arc convex surface 6c Bolt hole 7 Base 7a Cylindrical surface 8 Tightening bolt 9 Fixing bolt 10 Retaining washer 41 Rigid overhead wire 42 Aluminum stand 43 Trolley wire

Claims (3)

A pair of columnar insulators that are fixed to the lower surface of the ceiling of the tunnel and are provided at predetermined intervals in the extending direction of the overhead wire so as to extend downward;
An insulator support plate for connecting the lower ends of the pair of insulators;
An overhead wire support plate that is supported at the center upper portion of the lever support plate via a pedestal, extends to the left and right in the direction perpendicular to the extension of the overhead wire, and supports a rigid overhead wire at the lower portion of the left and right symmetrical position,
A clamp bolt that penetrates the lever support plate, the pedestal, and the overhead wire support plate and clamps them;
In the pedestal, the upper surface is a cylindrical surface along the axial direction in the extending direction of the overhead wire,
The overhead wire support plate has a bolt hole that allows the fastening bolt to pass through with play, and has an arc concave surface that makes surface contact with the cylindrical surface of the pedestal, and has a relative free movement range between the bolt hole and the fastening bolt with respect to the pedestal. The fixed angle can be adjusted around the cylinder surface,
Thereby, the angle of the supporting position of the pair of rigid overhead wires can be adjusted around the cylindrical surface of the pedestal. The insulator support plate has a flat plate shape and has attachment portions fixed to both ends of the insulator by fixing bolts on the lower surface of the insulator, and an intermediate portion having a receiving portion parallel to the attachment portion and having a different height. The seat is configured to be formed by press molding,
The overhead wire support device for a tunnel according to claim 1, wherein the insulator support plate is disposed on the seat portion via the pedestal. The lever support plate is formed by bending a rectangular flat plate material, extends long in the extending direction of the overhead wire, and has attachment portions fixed to the lower surface of the lever with fixing bolts at both ends, and an intermediate portion. In addition, it has a seat portion parallel to the mounting portion, lower than the mounting portion, and this seat portion is configured to be formed by press molding,
The overhead wire support device for a tunnel according to claim 1 or 2, wherein the insulator support plate is disposed on the receiving portion via the pedestal.

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