JP2019097289A - Trough and trough lid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trough lid capable of constructing a trough corresponding to a curved portion of a track without causing a significant increase in cost. SOLUTION: One end side and the other end side of a plate-shaped trough lid which is substantially rectangular in a top view with respect to the longitudinal direction of the installed trough are the same so as to bulge outward and inward, respectively. It is configured to be curved along the width direction due to the curvature. Further, a step is formed on each of the side of one end and the side of the other end, and the step of the side of one end and the step of the side of the other end are upside down. [Selection diagram] Figure 1

Description

  The present invention relates to a trough and a trough lid for laying cables, and more particularly to a technology effectively applied to a trough installed along a railway track and a trough lid installed thereon.

In the railway track, troughs for laying cables for supplying signal lines and power lines for transmitting signals and supplying power to the railway equipment are installed along the tracks, and The upper part is closed by a trough lid divided in the extending direction. In recent years, in the track of high-speed railways, with the speeding up of trains, there is an increasing need for measures against an accident in which the trough lid is lifted and detached due to wind pressure generated by passing the trains.
In addition, the trough lid for railways is generally made of concrete in many cases from the viewpoint of weight and cost. However, if the weight of the trough lid is increased to prevent the lid from lifting up, manual movement and installation work become difficult.

Conventionally, as an invention regarding the lid of the trough for laying a cable, there are some which are indicated, for example in patent documents 1 and 2, and 3.
Among them, in Patent Document 1, in order to prevent the trough lid from coming off the trough main body, the front end of the trough lid is provided with a projection for preventing the lower end of the other trailing edge of the trough lid from coming up and floating. The technology that has been made is described.

On the other hand, according to Patent Document 2, as a cover main body is solved in order to solve the problem that the concrete trough main body and the cover rub against each other by vibration at the time of passing the train and noise is generated or dust of concrete is splashed in the air. The invention has been described in which a rebar portion is used as a core and light gravel, sand, cement, short glass fibers and the like are used as a material in a plate-like block.
Moreover, in order to comprise a curved trough, while making the side wall of a trough curved, patent document 3 describes the technique which covered the trough lid | cover with which the side was curved. In the trough lid described in Patent Document 3, the front end and the rear end are linear.

Registered utility model No. 3104075 JP, 2002-138451, A JP, 2011-61997, A

  As described in Patent Document 3, in order to form a curved trough, if a trough lid whose side is curved is covered, it is necessary to prepare two types, a straight trough lid and a curved trough lid. You must. In addition, since there are curves with different curvature radii of the railway track, it is necessary to prepare a plurality of types of trough lids whose sides are curved according to the curvature of the curves. Therefore, in the technique described in Patent Document 3, there is a problem that cost increase is caused.

The present invention has been made focusing on the above problems, and the purpose of the present invention is to provide a trough lid capable of constructing a trough corresponding to a curved portion of a track without causing a significant cost increase. To provide.
Another object of the present invention is to provide a trough and a trough lid which can suppress the lift caused by the wind pressure generated as the train passes without increasing the weight.

In order to achieve the above object, the present invention is
A plate-like trough lid that is substantially rectangular in top view,
The sides of one end and the other end of the installed trough are configured to be curved along the width direction with the same curvature so as to bulge outward and inward, respectively. is there.
According to the trough lid configured as described above, when installed in a trough that is disposed in a curved manner corresponding to a curved portion, a gap is not generated between the ends of the adjacent trough lids It is possible to prevent rainwater from entering the inside of the trough.
Further, since the same trough lid can be used for both the straight section trough and the curved section trough, the cost can be reduced.

Here, preferably, the step is formed on the side of the one end and the side of the other end, and the step on the side of the one end and the step on the side of the other end are opposite in the vertical direction. To be.
According to this configuration, when the plurality of trough lids are installed side by side along the trough, the front edge of the trough lid engages with the step of the front edge of one trough lid and the step of the rear edge of the other trough lid. It is possible to prevent the floating of the trough lid by the wind generated as the train travels.

Further, desirably, handle portions having concave portions which can be inserted from the outside direction are respectively formed on both sides.
According to the above configuration, since the handle portions are provided on both sides of the trough lid, the trough lid can be easily lifted and moved or installed at a desired position.

Preferably, the trough lid is installed to close an upper opening of the trough disposed in the railway track,
The length in the front-rear direction and the width in the left-right direction are substantially the same size,
The radius of curvature of the curved side of the one end and the side of the other end is set to be substantially the same as the minimum value of the curvature radius of the curve defined in the railway track .
According to such a configuration, it is possible to prevent a gap from being generated between the ends of adjacent trough lids, and to use the same trough lid for troughs installed in curved sections having different radii of curvature. The cost can be reduced.

Furthermore, desirably, in the trough installed so as to close the top opening of the trough main body disposed in the railway track, the trough lid configured as described above,
The trough lid is configured to be installed so that the side of the one end which is curved so as to expand outward faces the traveling direction of the train.
According to this configuration, the front end of the curved trough lid acts to release the wind generated as the train travels to the left and right, and the step on the front end of the trough lid is the step on the rear end of the adjacent trough lid Since the train wind flows along the upper surface of the trough lid and it becomes difficult to enter the lower portion of the trough lid, the trough lid can be prevented from rising.

  As described above, according to the trough lid according to the present invention, it is possible to construct a trough corresponding to the curve of the track without causing a significant cost increase. In addition, there is an effect that it is possible to suppress the floating due to the wind pressure generated as the train passes without increasing the weight.

It is a top view showing one embodiment of a trough lid concerning the present invention. It is a front view, a sectional view, a side view showing a trough lid of an embodiment, and a sectional view showing a state where the trough lid is installed on a trough body. It is a bottom view of the trough lid of an embodiment. It is a top view which shows the state which installed the trough lid | cover of embodiment of FIG. 1 continuously to the trough of a linear trough and a curve location. It is a top view which shows the state which installed continuously what changed the curvature and length and width of the front-back direction of the front end of a trough cover of embodiment, and front-back direction according to the trough of a curve location. It is an explanatory view showing the relation between the curvature and the curvature radius of the front end of the trough lid of an embodiment.

Hereinafter, embodiments of a trough lid and a trough using the same according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view showing an embodiment of a trough lid according to the present invention, FIG. 2 (A) is a side view of the trough lid shown in FIG. 1 seen from the direction of arrow A, FIG. 2 (B) is B in FIG. FIG. 2C is a front view of the trough lid as viewed in the direction of arrow C in FIG. 1. Moreover, FIG. 3 is a bottom view which shows the example of a structure of the bottom face (back surface) of the trough lid | cover of FIG.

As shown in FIG. 1, the trough lid 10 of the present embodiment has a substantially square shape in top view, and the front end (right side in the drawing) is curved so as to expand outward, and the rear end (left side in the drawing) The side is curved so as to expand inward. The curved surfaces of the front end and the rear end of the trough lid 10 form a part of a circular arc having a predetermined radius of curvature, as described later. This is to correspond to the curved portion of the track, and the trough lid 10 of the present embodiment can be used for either a straight line area or a curved portion.
Further, both sides (upper and lower sides in FIG. 1) of the trough lid 10 are formed so as to form straight lines parallel to each other. In addition, the ratio of the length and width of the trough lid 10 can be set arbitrarily. The corners of the trough lid 10 are beveled or rounded so as not to be sharp.

Furthermore, as shown in FIG. 2A, in the trough lid 10 of the present embodiment, steps 11A and 11B having substantially the same width are formed at the front end and the rear end. Among them, the step 11A at the front end is formed so that the outer upper surface is lower like a step, and the step 11B at the rear end is formed on the lower surface side of the trough lid 10 contrary to the step 11A.
By forming the steps 11A and 11B as described above at the front end and the rear end, when the plurality of trough lids 10 are installed side by side along the left-right direction of the figure, the steps 11A and 11B are engaged with each other. The front end of the trough lid 10 can be prevented from rising.

  Moreover, the trough lids 10 of the present embodiment are provided with grip portions 12A and 12B at substantially central positions on both sides. The handle portions 12A and 12B are formed so as to be recessed downward as well as inward as shown in FIG. 2 (B) showing a cross section taken along the line B-B in FIG. Furthermore, recessed portions 12a and 12b each having a depth and height of 2 to 3 cm are formed in the back of each handle portion 12A and 12B, and the operator can lift the trough lid 10 by inserting a finger of the hand. Is configured as.

  Furthermore, at the center of the front end of the trough lid 10 of the present embodiment, as shown in FIG. 2C, an elongated tool insertion hole 13 is formed in the width direction of the lid. In the state where the plurality of trough lids 10 are arranged side by side, when the tip of a tool such as a burl is inserted and the opposite side is pushed downward, this tool insertion hole 13 is the trailing edge of the adjacent trough lid Is a structure provided to facilitate removal of the trough lid.

Moreover, while the trough lid 10 of this embodiment is formed so that the upper surface is substantially flat, as shown in FIG. 2 (A), the upper surface has a plurality of shapes such as, for example, ○. A non-slip projection 14 is formed. The shape of the non-slip projection 14 is not limited to the circle mark, but may be an arrow or a plus mark. In addition, when it is set as the protrusion 14 of arrow shape, the direction of the arrow is set so that it may face the rear end from the front end of a lid. This direction corresponds to the traveling direction of the train.
For example, as shown in FIG. 2D, the trough lid 10 having the above configuration is installed on the trough main body 20 having a U-shaped cross section so as to close the upper opening.

  Furthermore, as shown in FIG. 3, the trough lid 10 of the present embodiment is provided with a plurality of square or rectangular depressions 15 arranged in a lattice on the lower surface. These recesses 15 are for reducing the weight of the trough lid 10, and the depth does not cause the crack in the trough lid 10 even if a person gets on, depending on the strength of the material (concrete) constituting the trough lid 10. For example, when the thickness of the trough lid 10 is 50 mm, the depth of the recess 15 may be about 1/3 to 1⁄4 of the thickness of the lid. Moreover, in order to avoid stress concentration, a tapered surface is formed on the peripheral portion (four sides) of each recess 15. The material which comprises the trough lid | cover 10 is not limited to concrete, A synthetic resin or a metal may be sufficient.

  According to the trough lid 10 of the present embodiment configured as described above, as shown in FIG. 4 (A), even when the trough is constructed in a linear shape, as shown in FIG. 4 (B), Even when the trough is bent and constructed according to the curve, it can be installed without creating a gap at the joint of the front and rear trough lids 10, and it is possible to make rainwater less likely to intrude into the trough.

  Moreover, the trough cover 10 of this embodiment is installed so that the front end may be opposed to the traveling train when the traveling direction of the train is indicated by the arrow F. The train traveling at a high speed generates a wind in the direction of arrow F (hereinafter referred to as a train wind) on the track, but if the trough lid 10 is installed as described above, it curves The front end of the trough lid acts to release the train wind from side to side. Further, since the step 11A at the front end of the trough lid 10 is installed below the step 11B at the rear end of the adjacent (forward) trough lid 10, the train wind flows along the upper surface of the trough lid It becomes difficult to flow down the trough lid. As a result, it becomes easier to prevent the floating of the trough lid as compared to the case where the trough lid is installed in the direction opposite to the traveling direction of the train.

Next, how to install the trough lid 10 of the present embodiment and how to set the curvature of the curvature of the front end and the curvature of the rear end will be described.
Assuming that the width of the trough lid 10 is W and the length thereof is L, the relationship between the width W and the length L of the trough lid 10 in the embodiment is W ≒ L. On the other hand, in the case of a trough lid in which the length L is set to be sufficiently larger than the width W (L> W) while keeping the curvature of the curvature at the front end and the curvature at the rear end the same. As shown in FIG. 5 (A), since the curvature of the front end of the front and rear trough lids and the curvature of the rear end can not correspond, a gap is generated at the junction of the front and rear trough lids, and rainwater easily penetrates into the troughs. Become. Therefore, the curvature of the front end curvature and the rear end curvature of the trough lid 10 will be discussed.

First, consider the case where the width W and the length L of the trough lid 10 are equal (W = L). Further, the radius of curvature of the curve of the front end and the rear end of the trough lid 10 is R1, and the radius of curvature of the curve of the orbit is R2. Then, in this case, as shown in FIG. 6, straight lines S1 and S2 connecting the center O2 of the curvature of the curve of the track and the center points of the front end and the rear end of the trough lid 10 When the angle between the tangents T1 and T2 is represented by θ, the internal angle of the straight lines S1 and S2 is 2θ.
On the other hand, the angle between the center line C0 of the trough lid 10 and the straight lines U1 and U2 connecting the center O1 of the curvature of curvature of the front end and the rear end of the trough lid 10 and the corner of the front end of the trough lid 10 is R1 = It is geometrically proved that each R 2 becomes θ.

From the above reasons, in the case of W = L, the curvature of the curve of the front end and the back end of the trough lid 10 is set to coincide with the curvature of the curve of the track, without creating gaps in the front and rear trough lids. It can be seen that the trough lid can be installed.
In the track of the railway, the minimum value (Rc) of the curvature radius of the curve is specified, which is 200 m for the conventional railway and 4000 m for the high-speed railway such as Shinkansen (registered trademark). Therefore, the radius of curvature of the curvature of the front end and the rear end of the trough lid 10 may be set to 200 m or 4000 m, depending on the type of the applied track.

If the curvature radius R1 of the curvature of the front end and the rear end of the trough lid 10 is smaller than the minimum value Rc of the curvature radius of the curve, that is, R1 <Rc, L> W can be established (FIG. 5 (B (B) )reference). Further, if the length L of the trough lid 10 is smaller than the width W, that is, L <W, R1> Rc can be obtained (see FIG. 5C).
As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various deformation | transformation and change are possible. For example, in the above embodiment, the non-slip projection 14 is formed on the upper surface of the trough lid, but this projection may be omitted. Further, although the upper surface of the trough lid is flat, it may have a curved surface in the width direction so as to be convex upward.

Furthermore, in the above embodiment, the bottoms of both sides of the trough lid are formed substantially flat, but the bottoms of both sides may be formed with a step that engages with the upper end of the side wall of the trough.
In the above embodiment, the present invention has been described on the assumption that the present invention is applied to a trough and a trough lid installed in a railway track, but the present invention is not limited to the trough and trough lid for a railway track. It can also be used for troughs and trough lids that are installed on etc.

Reference Signs List 10 trough lid 11A, 11B level difference 12A, 12B handle portion 13 tool insertion hole 14 protrusion for anti-slip 15 recess for weight reduction

Claims (5)

A plate-like trough lid that is substantially rectangular in top view,
A trough characterized in that a side of one end and a side of the other end with respect to the longitudinal direction of the installed trough are curved along the width direction with the same curvature so as to expand outward and inward, respectively. lid.   A step is formed on the side of the one end and the side of the other end, and the step on the side of the one end and the step on the side of the other end are opposite in the vertical direction. The trough lid according to claim 1.   The trough lid according to claim 1 or 2, wherein handle portions having recesses which can be inserted from the outside direction are respectively formed on both sides. A trough lid installed to close an upper opening of a trough disposed in a railway track,
The length in the front-rear direction and the width in the left-right direction are substantially the same size,
The radius of curvature of the curved side of the one end and the side of the other end is set to be substantially the same as the minimum value of the curvature radius of the curve defined in the railway track. The trough lid according to any one of claims 1 to 3. The trough lid according to any one of claims 1 to 4 is a trough installed so as to close an upper opening of a trough main body disposed in a railway track,
The trough lid is installed so that the side of the one end, which is curved to bulge outward, faces the traveling direction of the train.

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