JP2007205126A - Drainage pipe for bridge pier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bridge pier drainage pipe which improves the appearance of the drainage pipe set on the bridge pier. <P>SOLUTION: The bridge pier drainage pipe includes a back face 51 which has drainage pipe metal fittings 80 fixed thereto, which metal fittings 80 engage with bridge pier metal fittings 90 fitted in advance to the bridge pier 2, a front face 52 which has an almost arcuate section and whose both sides are connected to both ends of the back face 51, and extension portions 53 which are formed consecutively on both ends of the front face 52 to cover the drainage pipe metal fittings 80 and the bridge pier metal fittings 90. Since the front face 52 has the nearly arcuate section, the front face 52 shows no angled part when seen from the front or side, thus offers an appearance better than that of a conventional drainage pipe that has a rectangular section to make an angled part conspicuous. The drainage pipe metal fittings 80 disposed on the back face 51 and the bridge pier metal fittings 90 disposed on the bridge pier 2 are covered with the extension portions 53 to prevent the exposure of these metal fittings, which also improves the appearance of the bridge pier drainage pipe. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

    The present invention relates to a drainage pipe for a pier attached along a pier.

In order to drain down rainwater and the like on the upper surface of a bridge such as a railway, a pier drain pipe is provided on the pier along a direction from the back side of the bridge to the lower side.
Many of these drainage pipes for piers are made of a cylindrical drainage pipe made of vinyl chloride whose interior is hollow, and a plurality of these drainage pipes are arranged in series up and down, and these are fixed to the pier. Yes. At the time of fixing the drainage pipe, a mounting bracket in which an arc-shaped locking part for locking the outer periphery of the drainage pipe and a mounting piece part for bolting to the bridge pier are integrally used.

Since such a drain pipe is formed in a cylindrical shape, the balance with the pier formed in a prismatic shape is usually poor, and the appearance of the entire pier is impaired.
Therefore, in order to reduce the exposed part of the drain pipe and improve the appearance of the pier, a dent is formed in the part of the pier where the pier drain pipe is attached, and the pier bracket is fixed to the bottom of the dent, and the pier drain A drain pipe fitting is fixed to the back surface of the pipe, the drain pipe fitting and the pier fitting are engaged with each other, the pier drain pipe is attached to the pier, and the pier drain pipe is attached to the pier. There is a conventional example that does not protrude from the front of the pier (Patent Document 1).

JP 2002-220814 (FIG. 2)

In the conventional example shown in Patent Document 1, since the pier drain pipe has a rectangular cross section, corners formed on the front portion thereof are conspicuous with respect to the pier, and the appearance cannot be sufficiently improved. And since the dent must be formed in the location which attaches the drainage pipe for piers of a pier, the place to install is restrict | limited.
When the technology of the conventional example is applied to a flat place where there is no dent in the pier, the drainage pipe has a rectangular cross section, so the metal fitting to attach it is exposed from the side of the drainage pipe, and the drainage pipe is attached. The appearance of is damaged.

  The objective of this invention is providing the drainage pipe for piers which can improve the external appearance when it is installed in a pier.

  The pier drainage pipe of the present invention is a pier drainage pipe that is attached along the pier, and a back surface portion to which a drainage pipe fitting that engages with the pier metal fitting fixed to the pier is fixed, and the back surface thereof. A front portion having a substantially arc-shaped cross-section in which both sides are connected to both ends of the portion, and an extending portion that is continuously formed at both ends of the front portion and covers the drainage pipe fitting and the pier fitting. Features.

  In the present invention, since the front portion is formed in an arc shape in cross section, when viewed from the front or obliquely, the corner portion cannot be visually observed on the front portion. And since the drainage pipe fittings provided on the back surface and the pier fittings provided on the pier are covered with the extension part, these fittings are not exposed when the drainage pipe is viewed from the front or obliquely. From this point, the appearance is improved.

Here, in this invention, the structure by which the said back part, the said front part, and the said extension part are integrally formed with the glass fiber reinforced plastic or hard vinyl chloride is preferable.
In the invention of this configuration, the pier drainage pipe is easily formed by a molding method such as extrusion molding. Moreover, by forming from glass fiber reinforced plastic or hard vinyl chloride, the pier drainage pipe can obtain light weight and high strength.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front sectional view of a railway bridge 1, and FIG. 2 is a side sectional view of the railway bridge 1.
1 and 2, the bridge 1 includes a flat portion 1A and a plurality of reinforcing portions 1B provided below the flat portion 1A. A bridge pier 2 that supports the bridge 1 is provided between the adjacent reinforcing portions 1B, and the bridge pier 2 is erected on the foundation.
On the upper surface of the flat surface portion 1A, a rail mounting portion 3 on which a rail for rail 3A is mounted is provided.
The pier 2 is formed in a substantially prismatic shape, and its side surface is formed in a flat shape.
A drain box 4 is provided on the bridge 1 in the vicinity of the rail mounting portion 3, and a drainage channel including a pier drainage pipe 5 and connection drainage pipes 61 to 65 is connected to the drain box 4. That is, the rain and snow melted on the upper surface of the bridge 1 gathers in the drain box 4 of the bridge 1, and from here the pier drain pipe 5 and the connection pipes 61-61 provided along one wall surface of the pier 2. It flows down the interior of 65 and flows into a groove 7 provided under the pier 2.

One end of a first connection drain pipe 61 attached to the back surface of the bridge 1 is connected to the drain box 4 with a stainless steel fitting 611, and the other end of the first connection drain pipe 61 is made of stainless steel. A second connection drain pipe 62 attached to the side surface of the pier 2 is connected by a metal fitting 621.
A third connection drain pipe 63 attached to the side surface of the reinforcing portion 1B of the bridge 1 is connected to the other end portion of the second connection drain pipe 62 with a stainless steel fitting 631. This third connection The other end of the drainage pipe 63 is connected to a fourth connection drainage pipe 64 attached to the side surface of the pier 2 with a stainless steel fitting 641.
A bridge pier drain pipe 5 is connected to the other end of the fourth connection drain pipe 64, and two upper and lower pier drain pipes 5 are connected in series. A fifth connecting drain pipe 65 is connected to the other end of the pier drain pipe 5 disposed on the lower side, and the other end of the fifth connecting drain pipe 65 is opened toward the groove 7. Yes.

3 and 4 show the detailed structure of the pier drain pipe 5.
FIG. 3 is a horizontal sectional view of the pier drain pipe 5, and FIG. 4 is an exploded perspective view showing a state where the pier drain pipe 5 is attached to the pier 2.
In FIG. 3, the pier drain pipe 5 includes a back surface portion 51 having a substantially linear cross section disposed opposite to the wall surface of the pier 2, and a front surface portion 52 having both ends connected to both side edges of the back surface portion 51, The front part 52 is provided with an extension part 53 formed continuously at both ends, and the back part 51, the front part 52 and the extension part 53 are extruded from glass fiber reinforced plastic (FRP). It is integrally formed by molding means. The back surface portion 51, the front surface portion 52, and the extending portion 53 have substantially the same thickness dimension. Here, the cross-sectional shape of the front part 52 should just be a substantially circular arc shape, for example, may be a semicircle shape.
A space formed between the back surface portion 51 and the front surface portion 52 is a space through which rainwater flows. The extension part 53 is substantially orthogonal to the front part 52.
A plurality of bridge pier drain pipes 5 (two in FIGS. 1 and 2) are connected vertically, and connection sockets (not shown) are attached to both ends of the pier drain pipe 5 inside. A rubber packing (not shown) is provided at the tip of the for the purpose of preventing water leakage.

As shown in FIG. 4, a plurality of drain pipe fittings 80 are fixed to the back surface 51 at predetermined locations. The drain pipe fitting 80 is fixed to the back surface of the back surface 51 by an appropriate means such as adhesive or bolting, and is integrally formed with the mounting piece 81 and has a predetermined dimension from the back surface 51. And a locking piece portion 82 that is disposed apart.
A pier metal fitting 90 is fixed at a position facing the drain pipe metal fitting 80 of the pier 2.
The pier fitting 90 includes an anchor 91 (see FIG. 3) embedded in the pier 2, a mounting metal body 92 that is locked to the anchor 91, and a bolt 93 that attaches the mounting metal body 92 to the anchor 91. Prepare.
When the anchor 91 is driven into the wall surface of the pier 2, the bottom portion expands to firmly bite into the pier 2.

The mounting bracket main body 92 has a mounting piece portion 92A to be attached to the pier 2 and a predetermined space provided between the mounting piece portion 92A and the pier 2 so that the locking piece portion 82 of the drain pipe fitting 80 is locked. The U-shaped main body 92B is formed.
As shown in FIG. 3, the width dimension of the mounting bracket main body 91 is shorter than the width dimension of the back surface portion 51.
The extension part 53 has a dimension D from the tip thereof to the back surface of the front part 52. This dimension D is long enough to cover the drain pipe fitting 80 and the pier fitting 90, and the tip of the extension 53 does not interfere with the wall surface of the pier 2 when the pier drain pipe 5 is installed on the pier 2. It is said to be length.

A specific structure of the first to fifth connecting drain pipes 61 to 65 will be described.
As shown in FIG. 1, the first connection drain pipe 61 is formed in a cylindrical shape extending linearly from the FRP, and the cross section thereof is a flat plate-like back surface portion facing the bottom surface of the bridge 1 and a substantially arc shape. It is a substantially semicircular shape integrally formed with the front part. One end of the first connecting drain pipe 61 is closed with a lid, and a connecting cylinder part 61 </ b> A for connecting to the drain box 4 is formed on a part of the back surface part.
FIG. 5 shows configurations of the second connection drain pipe 62 to the fourth connection drain pipe 64, respectively.
FIG. 5A shows a second connection drain pipe 62. 5A, the second connecting drain pipe 62 has a substantially semicircular cross section in which a flat plate-like back surface portion facing the bottom surface of the bridge 1 and a substantially arc-shaped front surface portion are integrally formed. A horizontal portion 62A having one end connected to the first connection drain pipe 61, a bent portion 62B connected to the horizontal portion 62A, and a vertical portion 62C connected to the bent portion 62B. I have. These members are integrally formed from FRP. The curved portion 62B has a slightly larger curvature on the back side than the curvature on the front side.

FIG. 5B shows a third connection drain pipe 63. 5B, the third drainage pipe 63 for connection has a substantially semi-circular cross section in which a flat plate-like back surface portion facing the bottom surface of the bridge 1 and a substantially arc-shaped front surface portion are integrally formed. Yes, one end of which is connected to the second connecting drain pipe 62, the vertical portion 63A, the first bent portion 63B connected to the vertical portion 63A, and the first bent portion 63B. A first horizontal part 63C, a second bent part 63D connected to the first horizontal part 63C, and a second horizontal part 63E connected to the second bent part 63D. ing. These members are integrally formed from FRP.
The first bent portion 63B is configured to make the axes of the vertical portion 63A and the first bent portion 63B substantially orthogonal to each other in the vertical plane, and the curvature on the back side is slightly larger than the curvature on the front side.
The second bent portion 63D is configured to make the axes of the first bent portion 63B and the second bent portion 64D substantially orthogonal to each other in a horizontal plane.

FIG. 5C shows a fourth connection drain pipe 64. In FIG. 5C, the fourth connecting drain pipe 64 has a substantially semicircular shape in which the back surface portion and the substantially arc-shaped front portion are integrally formed, and one end portion is for the third connection. A first straight portion 64A connected to the drain pipe 63, a bent portion 64B connected to the first straight portion 64A, and a second straight portion 64C connected to the bent portion 64B are provided. ing. These members are integrally formed from FRP. The curved portion 62B has a slightly larger curvature on the back side than the curvature on the front side.
In FIG. 1, the fifth connecting drain pipe 65 has a substantially semicircular cross section in which a back surface portion and a substantially arc-shaped front surface portion are integrally formed, and a horizontal portion 65A and a vertical portion 65B are bent. It is formed.

According to this embodiment, there are the following effects.
(1) A back surface portion 51 to which a drainage pipe fitting 80 that engages with a pier fitting 90 attached in advance to the pier 2 is fixed, and both sides of a front portion 52 having a substantially arc-shaped cross section at both ends of the back surface portion 51. The pier drainage pipe 5 is configured to include the drainage pipe fitting 80 and the extending part 53 that covers the pier fitting 90 and is formed continuously at both ends of the front portion 52. Therefore, since the front portion 52 is formed in an arc shape in cross section, when viewed from the front or side, the corner portion is not visible in the front portion 52, and compared with a drain pipe having a rectangular cross section in which the conventional corner portion is conspicuous. Appearance is improved. In addition, since the drain pipe fitting 80 provided on the back surface 51 and the pier fitting 90 provided on the pier 2 are covered with the extending portion 53, these fittings are not exposed. Becomes better.

(2) The back part 51, the front part 52, and the extension part 53 are integrally formed. Therefore, the pier drain pipe 5 is easily formed by an appropriate means such as extrusion.
(3) Since the back part 51, the front part 52, and the extension part 53 are shape | molded from a glass fiber reinforced plastic, the drainage pipe 5 for piers can be made lightweight and big intensity | strength.

(4) Since not only the pier drain pipe 5 but also the connection drain pipes 61 to 65 are made of FRP, there is no difference in the coefficient of linear expansion between adjacent drain pipes, and the connecting portion of the pipe is disconnected due to temperature change. There is no.
(5) Since not only the drainage pipe 5 for the pier but also the drainage pipes 61 to 65 for connection are provided with a front portion having an arc-shaped cross section, the drainage pipes attached to the bridge 1 and the pier 2 can be unified as a whole. The appearance is good because it is designed.
(6) Since the curvature of the bent portions of the connecting drain pipes 61 to 64 is made smaller on the front side compared to the back side, the curved surfaces of the corners of the connecting drain pipes 61 to 64 are emphasized, and the appearance is improves.

In addition, this invention is not limited to the said embodiment, Other modifications etc. which can achieve the objective of this invention are included, The deformation | transformation etc. which are shown below are also contained in this invention.
For example, in the said embodiment, the attachment location and the number of the pier drain pipe 5 and the pier 2 are not limited, and are appropriately set according to the structure and size of the pier 2.
Moreover, although the said embodiment demonstrated the bridge pier 2 for railroads, it is applicable also to the pier used for roads and other uses.

In the embodiment, the pier drain pipe 5 is formed from FRP. However, in the present invention, the pier drain pipe 5 may be formed from a synthetic resin other than FRP, for example, vinyl chloride (vinyl chloride). Instead of resin, it may be formed from metal.
Moreover, it is not limited to what integrally forms the back surface part 51, the front part 52, and the extension part 53, The structure which manufactures these members separately and fixes them with an adhesive agent etc. may be sufficient.

  Further, the drainage pipe fitting 80 and the pier fitting 90 are not limited to the configuration of the above-described embodiment. For example, a fitting having the construction of the pier fitting 90 is adopted for the pier drainage pipe 5 and the drainage pipe for the pier 2 is used. The structure of the metal fitting 80 may be adopted.

  The present invention can be used for a railway or road pier.

It is a front sectional view of the bridge to which the drainage pipe for piers in one embodiment of the present invention is attached. It is a sectional side view of the bridge. It is a horizontal sectional view of a pier drain pipe. It is a disassembled perspective view which shows the state which attaches the pier drainage pipe to a pier. It is a schematic block diagram of the drainage pipe for connection.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Bridge 2 ... Bridge pier 5 ... Pier pier drain pipe 51 ... Back surface part 52 ... Front part 53 ... Extension part 80 ... Drain pipe metal fitting 90 ... Pier pier metal fitting

Claims (2)

A pier drain pipe installed along the pier,
A rear part to which a drainage pipe fitting that engages with the bridge pier fitting fixed to the pier is fixed, a front part having a substantially arc-shaped cross section having both sides connected to both ends of the rear part, and A pier drainage pipe, comprising: a drain pipe fitting continuously formed at both ends; and an extending portion that covers the pier fitting. In the drainage pipe for pier according to claim 1,
The drainage pipe for a pier, wherein the back surface portion, the front surface portion, and the extending portion are integrally formed of glass fiber reinforced plastic or hard vinyl chloride.

Images