WO2005029662A1

WO2005029662A1 - Cable trough

Info

Publication number: WO2005029662A1
Application number: PCT/JP2004/013426
Authority: WO
Inventors: Yu Furukawa; Norio Kishi
Original assignee: The Furukawa Electric Co., Ltd.
Priority date: 2003-09-19
Filing date: 2004-09-15
Publication date: 2005-03-31
Also published as: KR20070006666A; JP2005094961A; CN1853325A

Abstract

A cable trough used for laying cables comprises a trough body (14), and a lid (20) for closing the upper surface opening in the trough body (14). The trough body (14) includes female end (14f) and male end (14m) corresponding to the female end (14f) on its opposite sides, and a flat support surface (26) which is formed in the female end (14f), supports the male end (14m) and extends to the end surface of the female end (14f).

Description

Specification

Cape Nore Trough

Technical field

The present invention relates to a cable trough used for laying cables such as a communication cable and a power cable.

Background art

[0002] When laying cables alongside a railway track, the cables are generally housed in conduits, and such conduits have a large number of cable troughs arranged in a line. It is built side by side.

[0003] Each cable trough includes a trough body having both ends and an upper surface opened, and a lid for closing the upper surface opening of the trough body, and two adjacent cable troughs, that is, the trough bodies are connected to each other. . More specifically, the cable trough disclosed in Japanese Patent Application Laid-Open No. 2000-55240 has a length of about 400-500 mm, a transverse groove formed at the bottom of the trough body at one end, and the other end of the trough body. And a projection adapted to fit into the transverse groove.

[0004] Therefore, adjacent trough bodies are connected to each other by fitting the protrusion of the other trough body into the transverse groove of one trough body.

[0005] When a conduit constructed from a large number of cable troughs described above is used for a long period of time, water such as rainwater may accumulate in a transverse groove of the trough. Such stagnation of water causes various plants to be generated in the cable trough, starting from the plants in the traverse which cannot be breached by generating plants such as moss in the traverse. In addition, plants grown in the cable trough are housed in the conduit, and new cables are inserted into the conduit, which not only causes undesirable bending or twisting of the cable, but that is, This hinders the installation work.

Disclosure of the invention

[0006] It is an object of the present invention to provide a cable trough in which rainwater or the like does not accumulate in a conduit even when the conduit is used for a long period of time, so that plants are less likely to be generated in the conduit. [0007] In order to achieve the above object, a cable trough of the present invention is opened at both ends and an upper surface, respectively, and closes a trough body having a bottom wall and left and right side walls, and an upper surface of the trough body. The trough body is provided at one end formed as a male end, the other end formed as a female end corresponding to the male end, and at the female end. When the male ends of the rough body are mated, these matings further include an open path connecting between the lower surface area of the portion and the outer surface of the trough body with the female end.

[0008] A large number of cable troughs of the present invention are prepared and arranged in a row to construct a conduit for accommodating cables, and adjacent cable troughs are connected to each other. That is, the trough bodies of adjacent cable troughs are connected by mating the female end of one trough body with the male end of another trough body.

[0009] Even if water such as rainwater enters the trough body, the water is guided to the outer surface of the trough body through the path, and is discharged out of the trough body. Therefore, water does not stay between the adjacent trough bodies, that is, the interface between the female end and the male end. As a result, plants such as moss are hardly generated in the trough body, and the work of inserting cables into the conduit, that is, the cable trough is not hindered by the plants.

[0010] Specifically, the female ends are formed on the inner surface of each side wall, respectively, and are opposed to each other, and a vertical groove is left between the vertical groove and the end surface of the female end on the inner surface of the side wall. It includes a parallel vertical projection and a recess formed in the inner surface of the bottom wall to receive the male end, while the male end is formed on both sides thereof, respectively, for the vertical groove and the vertical projection of the female end. And a vertical protrusion and a vertical groove which can be relatively fitted with play.

[0011] In this case, the aforementioned path may include a flat surface formed at the bottom of the recess, and the flat surface extends to the end surface of the female end!

[0012] The above-mentioned flat surface guides water, such as rainwater, that has entered the mating portion between the male end and the female end to the female end, and discharges the water from the female end to the outside of the trough body. .

[0013] The female end may further include a horizontal protrusion formed on a flat surface and positioned at the center between the vertical protrusions, while the male end has a horizontal groove corresponding to the horizontal protrusion of the female end on its lower surface. In addition.

[0014] Further, the horizontal protrusions at the female end may extend between the vertical protrusions. In this case, the flat surface is formed as a horizontal groove by the horizontal protrusions. Even if such a horizontal groove exists, the path is Bottom force of horizontal groove at female end By further including a vertical hole extending to the lower surface of the bottom wall, water such as rainwater can be discharged out of the trough body.

The female end may include a transverse hole instead of or in addition to the longitudinal hole described above, the lateral hole also extending the lower force of the vertical groove at the female end to the outer surface of the side wall.

Brief Description of Drawings

FIG. 1 is a partially cutaway side view of a cable trough according to a first embodiment.

FIG. 2 is a plan view of the Cape Norre Trough of FIG. 1.

FIG. 3 is an end view showing a female end of the trough body in FIG. 1.

FIG. 4 is an end view showing a male end of the trough body in FIG. 1.

FIG. 5 is a diagram showing a connection method and an engaged state of adjacent trough bodies.

FIG. 6 is a plan view showing a trough body according to a second embodiment.

FIG. 7 is a side view of a male end of the trough body in FIG. 6.

FIG. 8 is an end view showing a male end of the trough body in FIG. 6.

FIG. 9 is an end view showing a female end and a male end of the trough body of FIG. 6.

FIG. 10 is a sectional view taken along the line XX in FIG. 9.

FIG. 11 is a side view showing a trough body of the third embodiment, partially cut away.

FIG. 12 is a plan view of the trough body of FIG.

FIG. 13 is a cross-sectional view along XIII-XIII in FIG.

FIG. 14 is a sectional view showing an engaged state of adjacent trough bodies.

FIG. 15 is a sectional view showing a trough body according to a fourth embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 and FIG. 2 show a part of a conduit 10 for laying cables (not shown) such as a signal cable and a power cable. The conduit 10 is constructed by arranging a number of cable troughs 12 in a row, and adjacent cable troughs 12 are connected to each other. Note that FIGS. 1 and 2 show only two adjacent cable troughs 12.

Each cable trough 12 includes a trough body 14. The trough body 14 is also formed with recycled plastic, that is, recycled plastic, and has a bottom wall 16 and left and right side walls 18. That is, both ends and the upper surface of the trough body 14 are opened. The cable trough 12 further includes a lip 20 that closes an upper surface opening of the trough body 14, and the lip 20 is also formed with a recycled plastic force. In FIGS. 1 and 2, the lid 20 is indicated only by a two-dot chain line. Note that the rim 20 may be made of concrete.

1 and 2, the right end and the left end of the trough body 14 are formed as a female end 14f and a male end 14m, respectively. The female end 14f has vertical grooves 22 formed on the inner surfaces of the left and right side walls 18, respectively. The vertical grooves 22 face each other, extend from the bottom wall 16 to the upper surface of the side wall 18, and open at the upper surface of the side wall 18.

[0019] Each vertical groove 22 has left and right vertical projections 24 added to the female end 14f, and the vertical projections 24 are positioned between the end face of the female end 14f and the vertical groove 22. The vertical projections 24 extend along the vertical grooves 22, set back from the inner surface of the corresponding side wall 18 by a predetermined distance D (see FIG. 2), and have rounded tips.

[0020] Furthermore, the female end 14f has a recess formed on the inner surface of the bottom wall 16, and this recess extends in the vertical groove 22 over the end face of the female end 14f, and the flat receiving surface 26 facing upward. To form As is clear from FIG. 3, the receiving surface 26 extends the lower ends of the vertical grooves 22 and the vertical projections 24 below the inner surface of the bottom wall 16. The receiving surface 26 may be substantially parallel to the inner surface of the bottom wall 16 or may be slightly inclined downward toward the edge 26a between the left and right vertical projections 24 (see FIG. 2). .

[0021] More specifically, in FIG. 2, the distance between the step surface 27 between the inner surface of the bottom wall 16 and the receiving surface 26 and the end surface of the female end 14f is indicated by reference numeral L. In FIG. 3, the distance between the bottoms of the left and right vertical grooves 22, the distance between the left and right vertical projections 24, the distance between the inner surface of the bottom wall 16 and the receiving surface 26, and the distance between the receiving surface 26 and the trough body 14. The distance to the upper surface of is denoted by W, W, Τ, H

1 2 1 are shown respectively.

On the other hand, the male end 14m of the trough body 14 is formed as a tenon, and the protruding length of the male end 14m corresponds to the distance L described above. The male end 14m has a shape and size that fits the female end 14f of the trough body 14, ie, the vertical groove 22 and the vertical protrusion 24. More specifically, as is apparent from FIG. 4, the male end 14m extends along the opening edge of the left end surface of the trough body 14. Vertical grooves 30 are respectively formed on both outer side surfaces of the male end 14m, and the vertical grooves 30 are respectively opened on the upper surface and the lower surface of the male end 14m. Vertical groove 30 It has a width wider than the width of the vertical protrusion 24 described above, and has a concave bottom surface.

The presence of the vertical groove 30 is obtained by attaching a vertical protrusion 32 to the tip of the male end 14m, and the vertical protrusion 32 has a width smaller than the width of the vertical groove 22 described above. The tip of the vertical projection 32 is rounded similarly to the tip of the vertical projection 24.

More specifically, as shown in FIG. 4, the distance between the bottoms of the left and right vertical grooves 30, the distance between the tips of the left and right vertical projections 32, and the thickness of the lower part of the male end 14 m are respectively the aforementioned distances. W

, W, T Force equivalent to the height of male end 14m Is height H equal to the distance H mentioned above?

2 2 1 or slightly shorter than distance H.

Since the trough body 14 of the first embodiment has the female end 14f and the male end 14m described above, the male end 14f of one trough body 14 corresponds to the male end of the other trough body 14. An upward force can be inserted into the end 14m, and the two trough bodies 14 are connected with their female ends 14f and male ends 14m engaged with each other as shown in FIG. In other words, the vertical protrusion 32 of the male end 14m is inserted into the vertical groove 22 of the female end 14f, and the vertical protrusion 24 of the female end 14f is inserted into the vertical groove 30 of the male end 14m. Placed on 26.

[0026] The height H of the male end 14m is slightly smaller than the distance H from the receiving surface 26 to the upper surface of the trough body 14.

2 1 When the length is short, when the female end 14f and the male end 14m engage each other, a desired gap G can be reliably secured between the lower surface of the male end 14m and the receiving surface 26.

[0027] Further, since the width of the vertical grooves 22, 30 is wider than the width of the vertical protrusions 32, 24, as apparent from Figs. 1 and 2, the engagement of the vertical grooves and the vertical protrusions is equal to the trough body. It has play in 14 axial directions.

[0028] The many trough bodies 14 are connected by connecting the female ends f and the male ends 14m of the adjacent trough bodies 14 to each other to form a laying groove of a desired length. At this time, the adjacent trough bodies 14 are arranged such that their upper surfaces are flush with each other.

[0029] Thereafter, the cables are stored in the laying groove, and the trough body 14 is closed by the above-mentioned lip 20, whereby the construction of the conduit, that is, the laying of the cables is completed.

[0030] During long-term use of the conduit, even if water such as rainwater enters the trough body 14, this water does not stay at the female end 14f of the trough body 14, but is quickly discharged from the female end 14f. Is performed. That is, the receiving surface 26 of the female end 14f is flat, and has a groove that fits with the male end 14m. Therefore, the water that has reached the receiving surface 26 through the vertical groove 22 of the female end 14f is quickly discharged out of the trough body 14 from the receiving surface 26.

[0031] Therefore, plants such as moss are less likely to be generated in the trough body 14, and when laying new cables in the conduit, the insertion work of cables can be performed without any trouble.

[0032] The present invention is not limited to the first embodiment described above, and various modifications are possible.

In describing the second to fourth embodiments of the present invention below, portions similar to those of the first embodiment and the above-described embodiment are denoted by the same reference numerals and are not described. Avoid duplication and explain only the differences.

FIG. 6 shows a trough body 14 according to a second embodiment.

The trough body 14 of the second embodiment has a horizontal projection 34 on the receiving surface 26 of the female end 14f. The horizontal protrusion 34 is positioned at the center between the vertical protrusions 24 and has a height lower than the height T of the step surface 27 described above. The horizontal projection 34 forms a horizontal groove 36 with the step surface 27, and the horizontal groove 36 has the same width as the vertical groove 22.

On the other hand, as shown in FIGS. 7 and 8, a horizontal groove 38 is formed on the male end 14m of the trough body 14, that is, on the lower surface of the male end 14m. They are connected to the lower ends of the vertical grooves 30, respectively. The presence of the horizontal groove 38 described above forms a downward horizontal projection 40 at the lower end of the male end 14m.

Accordingly, as shown in FIGS. 9 and 10, when the female end 14f of one trough body 14 is mated with the male end 14m (two-dot chain line) of the other trough body 14, The horizontal projection 34 at the end 14f is fitted with play in the horizontal groove 38 at the male end 14m, while the horizontal projection 40 at the male end 14m is fitted with play in the horizontal groove 36 at the female end 14f.

[0038] Even if the above-mentioned horizontal protrusion 34 is provided on the receiving surface 26, since the space between the horizontal protrusion 34 and the vertical protrusion 24 is open on the receiving surface 26, rainwater or the like is applied to the female end 14f. Water does not accumulate.

Further, since the left and right vertical projections 32 and the lower horizontal projections 40 are fitted into the left and right vertical grooves 22 and horizontal grooves 36, respectively, the male end 14m and the female end 14f are engaged with each other at three places. The connection between the male end 14m and the female end 14f can be further ensured. FIGS. 11 and 12 show a trough body 14 according to a third embodiment.

The trough body 14 of the third embodiment has a horizontal projection 42 instead of the horizontal projection 34, and the horizontal projection 42 extends between the left and right vertical projections 24. Therefore, the horizontal groove 44 formed between the horizontal projection 42 and the step surface 27 also extends between the left and right vertical grooves 22.

[0042] In this case, there is a possibility that the horizontal groove 44 may retain water such as rainwater. However, the coating trough body 14 of the third embodiment has two drain holes 46 at the bottom of the horizontal groove 44, and the drain hole 46 opens at the lower surface of the trough body 14, as is apparent from FIG. The number of the drain holes 46 may be one or three or more.

If the relationship of H> H described above is satisfied, as shown in FIG.

1 2

Even if the male end 14m of the other trough body 14 is mated with the female end 14f of the body 14, the gap G can be reliably secured between the horizontal protrusion 40 and the bottom of the horizontal groove 44. Accordingly, since the drain hole 46 is not closed by the horizontal projection 40, water does not stay in the horizontal groove 44.

In the case of the trough body 14 of the third embodiment, the horizontal protrusion 42 of the female end 14f is longer than the horizontal protrusion 34 of the second embodiment, so that the female end 14f and the male end 14m are connected. Be more secure.

FIG. 15 shows a trough body 14 according to a fourth embodiment.

In the case of the fourth embodiment, the female end 14f of the trough body 14 has drain holes 48 at the lower ends of the left and right vertical grooves 22, respectively, and these drain holes 48 open on the outer surface of the side wall 18 of the trough body 14. I say it.

[0047] The trough body 14 of the fourth embodiment can have both drain holes 46 and 48 as shown in the figure. Further, the trough bodies 14 of the first and second embodiments also have drain holes 46 and Z or drain holes in the receiving surfaces 26 and Z or the side walls 18 as shown by two-dot chain lines in FIGS. 1, 2 and 6. Equipped with a water hole 48.

Claims

The scope of the claims

[1] Cable troughs for laying cables

A trough body (14) having a bottom wall (16) and left and right side walls (18), each opening at both ends and an upper surface;

A lid (20) for closing an upper opening of the trough body (14);

With

The trough body (14)

One end formed as a male end (14m),

The other end formed as a female end (14f) corresponding to the male end (14m);

The female end (14f) is provided. When a male end of a trough body of another cable trough is engaged with the female end (14f), a lower surface area of these engaging portions and the female end (14) And an open path (26, 46, 48) connecting between the trough body (14) and the outer surface thereof.

[2] In the cable trough of claim 1,

The female end (14f) is formed on the inner surface of each of the side walls (18), and the vertical groove (22) facing each other, and the vertical groove (22) on the inner surface of the side wall (18) and the female A vertical projection (24) left between the end face (14f) and the vertical groove (22), and an inner surface of the bottom wall (16) formed by recessing the male end (14m). The male end (14m) is formed on each of both side surfaces thereof, and has a play with respect to the vertical groove (22) and the vertical protrusion (24) of the female end (14f). A vertical projection (32) and a vertical groove (30), each of which can be relatively fitted,

The path includes a flat surface (26) formed at the bottom of the recess, the flat surface (26) extending to the end surface of the female end.

[3] In the cable trough of claim 2,

The female end (14f) further includes horizontal protrusions (34, 42) formed on the flat surface (26) and located between the vertical protrusions (24),

The male end (14m) further includes a horizontal groove (38) on the lower surface corresponding to the horizontal protrusion (34, 42) of the female end (14f).

[4] In the cable trough according to claim 2,

The horizontal protrusion (42) of the female end (14f) extends between the vertical protrusions (24) to form the flat surface (26) as a horizontal groove (44),

The path further includes a vertical hole (46) extending from a bottom of the horizontal groove (44) of the female end (14f) to a lower surface of the bottom wall (16).

[5] In the cable trough according to claim 3,

The horizontal protrusion (42) of the female end (14f) extends across the vertical protrusion (24) to form the flat surface (26) as a horizontal groove (44),

The path further includes a lateral hole (48) extending to the outer surface of the side wall (18) under the vertical groove (22) at the female end (14f).

[6] In the cable trough according to claim 3,

The path includes a vertical hole (46) extending from the bottom of the horizontal groove (44) of the female end (14f) to the lower surface of the bottom wall (16), and the vertical groove (22) at the female end (14f). And a lateral hole (48) extending from the lower part of the side wall (16) to the outer surface of the side wall (16).

[7] In the cable trough according to claim 2,

The path may be a vertical hole (46) extending from the flat surface (26) to the lower surface of the bottom wall (16) or a horizontal hole extending from a lower inner surface of the side wall (18) to an outer surface of the side wall (18). (48) is included.

[8] In the cable trough according to claim 3,