JP2009232534A - Trough and trough lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a trough with a vent hole, which prevents rain water or the like from entering and exchanges air inside with air outside the trough. <P>SOLUTION: The trough includes a trough body 1 and a trough lid 3 to be put on the trough body 1. A vent hole 21 that connects the inside and outside of the trough body 1 is formed at the upper part of a side wall 7 of the trough body 1. The lid 3 has a flange portion 23 protruding from the side wall 7 of the trough body 1 and a vent hole 25 that connects the upper side and lower side of the lid 3 is formed in this flange portion 23. The air in the trough flows out of the trough through the vent holes 21, 25 and the air outside the trough flows into the trough. Therefore, it is possible to suppress a temperature rise in the trough and to reduce a difference in atmospheric pressure between inside and outside of the trough so that the lid 3 can be prevented from being lifted. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a trough used for laying a cable or the like, and a lid for the trough.

  The trough is composed of a trough body having a substantially concave cross section and a trough lid that covers the trough body. Conventional troughs are made of concrete, but because the troughs made of concrete are heavy, the burden on workers during installation work is great. For this reason, recently, troughs made of plastic (particularly, made of recycled plastic made from recycled plastic product waste) have been used (see Patent Documents 1 and 2).

JP-A-6-284544 JP 2008-17573 A

  In the conventional trough, when the trough body is covered with a trough lid, the air in the trough is not easily discharged to the outside. For this reason, when a heat-generating cable such as a power cable is laid in the trough, there is a problem that the temperature in the trough rises and the power transmission capacity is reduced or other cables are adversely affected. In addition, when a trough is laid on the side of a high-speed railway such as the Shinkansen, the air pressure at the time of passing through the train may cause the atmospheric pressure outside the trough to be lower than the internal atmospheric pressure, and the trough lid may turn up. In particular, a plastic trough has a high dimensional accuracy and it is difficult to form a gap.

  An object of the present invention is to provide a trough and a trough lid that can reduce a temperature rise in the trough and a pressure difference between inside and outside the trough.

  In order to achieve the above object, the present invention provides a trough having a trough body and a trough lid that covers the trough body, and a vent hole that communicates the inside and outside of the trough body is formed in the upper part of the side wall of the trough body. It is characterized by this.

  In the trough according to the present invention, the trough lid has an overhang portion that projects outward from the side wall of the trough body, and a vent hole that communicates the lower side and the upper side of the trough lid is formed in the overhang portion. It is preferable.

  In the trough according to the present invention, it is preferable that the vent holes of the trough body and the vent holes of the trough lid are alternately formed in the trough longitudinal direction.

  Further, the trough lid according to the present invention is characterized in that a vent hole communicating with the inside of the trough body is formed at a position corresponding to both sides or one side of the trough body when the trough body is covered.

  Further, the vent hole in the trough lid according to the present invention is formed in a projecting portion that projects outward from the side wall of the trough body of the trough lid, and a reinforcing rib having a guide piece for positioning the trough body at the lower end. It is preferable.

  According to the present invention, since the vent hole is formed in the upper part of the side wall of the trough body, the air inside the trough is discharged outside the trough and the air outside the trough is put inside the trough even when the trough lid is covered. Can be inhaled. Therefore, the temperature rise inside the trough and the pressure difference between inside and outside the trough can be reduced.

  In addition, if a vent hole is formed in a portion of the trough lid that protrudes outward from the side wall of the trough body, even if the trough is laid in contact with a wall of a structure or the like, the vent hole of the trough body passes through the trough lid. Since it is connected to the outside through the pores, air permeability can be ensured. Further, if the vent hole of the trough lid is formed in a portion that protrudes outward from the side wall of the trough body, there is little possibility that rainwater or the like flows into the trough. Also, because the trough lid vents are located on one or both sides of the trough lid, when using the top of the trough lid as an evacuation passage on a railroad track, etc. The risk of being fitted can be reduced.

  Furthermore, if the ventilation holes of the trough body and the ventilation holes of the trough lid are alternately formed in the trough longitudinal direction, the inflow of rainwater or the like into the trough can be further reduced.

  In addition, the trough lid according to the present invention has a vent hole leading to the inside of the trough body in a portion corresponding to both sides or one side of the trough body when the trough body is covered. The air inside the trough can be discharged outside the trough, and the air outside the trough can be sucked into the trough, reducing the temperature rise inside the trough and the pressure difference between inside and outside the trough. When used as an evacuation passage, it is possible to reduce the possibility that a heel with a high heel fits into the vent hole of the trough lid.

  Further, in the trough lid according to the present invention, if the vent hole is formed in the protruding portion and the reinforcing rib having the positioning guide piece at the lower end as described above, there is little possibility that rainwater or the like flows into the trough body. .

<Embodiment 1> FIG.1 and FIG.2 shows one Embodiment of this invention. This trough is composed of a plastic trough body 1 and a plastic trough lid 3 to be placed on the trough body 1.

  The trough body 1 has a substantially concave cross-sectional shape in which side walls 7 are integrally formed on both sides of the bottom plate 5. Reinforcing ribs 9 and 11 are formed on the lower surface of the bottom plate 5 and the outer surfaces of the side walls 7. In addition, a male connecting portion 13 is projected from one end portion of the trough body 1 in the longitudinal direction, and a female connecting portion (not shown) is formed on the inner surface of the other end portion. Since the trough body 1 is a standard object, when laying it on the side of the track, etc., the trough body 1 adjacent in the longitudinal direction is connected by fitting the male connecting portion 13 and the female connecting portion. go.

  On the other hand, reinforcing ribs 15 and guide pieces 17 are formed on the lower surface of the trough lid 3. The guide piece 17 is a portion for positioning the trough lid 3 by entering inside the side walls 7 of the trough body 1 when the trough lid 3 is put on the trough body 1. Further, a lower overlap portion 19 is formed at one end portion in the longitudinal direction of the trough lid 1, and an upper overlap portion (not shown) is formed at the other end portion. When covering the trough body 1 that has been laid, the trough lid 3 is covered so that the lower overlapping portion 19 and the upper overlapping portion of the trough lid 3 adjacent in the longitudinal direction overlap.

  The above configuration is the same as the conventional trough. The characteristics of this trough are that a vent hole 21 that communicates the inside and outside of the trough body 1 is formed in the upper part of the side wall 7 of the trough body 1, and that the trough lid 3 projects outward from the side wall 7 of the trough body 1. This is because the projecting portion 23 is provided, and the vent portion 25 is formed in the projecting portion 23 so as to communicate the lower side and the upper side of the trough lid 3. The vent hole 21 of the trough body 1 is formed between the reinforcing ribs 11.

  If the vent holes 21 and 25 are formed as described above, the air inside the trough flows out of the trough as shown by the arrows in FIG. 2, or the air outside the trough flows into the trough. The temperature rise in the trough can be suppressed, and the difference in atmospheric pressure between the inside and outside of the trough can be reduced to prevent the trough lid 3 from floating. Further, since the vent hole 25 of the trough lid 3 is formed in the overhanging portion 23 of the trough lid 3, when rainwater or the like is applied to the trough lid 3, the rainwater or the like passes through the vent hole 25 to the outside of the side wall 7. Since it drops, there is little possibility of entering the trough body 1 from the vent hole 21 of the trough body 1. Further, since the vent holes 25 of the trough lid 3 are formed on both sides of the trough lid 3 (only one side is acceptable), when using the top of the trough lid 3 as an evacuation passage, the heels of high heels and the like are vent holes 21. There is little risk of falling into the room.

  In this embodiment, the case where the vent hole 25 is formed in the trough lid 3 is shown. However, the vent hole 25 of the trough lid 3 may be omitted if the protruding portion 23 is formed in the trough lid 3. However, if the vent hole 25 is formed in the trough lid 3, as shown in FIG. 2, even when the trough is laid in contact with the wall 27 such as a structure, the inside and outside of the trough can be secured. .

<Embodiment 2> FIG. 3 shows another embodiment of the present invention. In the first embodiment, the case where the vent hole 21 of the trough body 1 and the vent hole 25 of the trough lid 3 are formed at the same position in the trough longitudinal direction has been shown, but this trough is composed of the vent hole 21 of the trough body 1 and the trough lid. 3 vent holes 25 are formed alternately in the trough longitudinal direction. In this way, rainwater or the like applied to the trough lid 3 drops through the vent hole 25 of the trough lid 3 at a position where the trough body 1 does not have the vent hole 21, so that rainwater or the like flows into the trough. It can be further reduced. Since the configuration other than the above is the same as that of the first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

Embodiment 3 FIG. 4 shows still another embodiment of the present invention. In the first embodiment, the case where the vent hole 21 of the trough body 1 is formed in a substantially U shape reaching the upper end of the side wall 7 has been shown. However, this trough has the vent hole 21 of the trough body 1 on the side wall 7. This is a case where a long hole that does not reach the upper end (round hole, rectangular hole, etc. is acceptable). Even with such a configuration, the same effect as in the first embodiment can be obtained. Since the configuration other than the above is the same as that of the first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

Embodiment 4 FIG. 5 shows an embodiment of a trough lid according to the present invention. The trough lid 3 is formed with vent holes 25 communicating with the inside of the trough body 1 at positions corresponding to both sides in the width direction (both sides of the trough body 1 when the trough body 1 is covered). The vent hole 25 is provided with a reinforcing rib 15a (a side wall 7 on both sides of the trough body 1) having a projecting portion 23 projecting outward from the side wall 7 of the trough body 1 of the trough lid 3 and a guide piece 17 for positioning the trough body at the lower end. Reinforcing ribs on the top). In FIG. 5, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and redundant description is omitted.

  If such a trough lid 3 is used, even if the trough main body 1 is not provided with a vent hole or the trough main body 1 is an existing one, air permeability inside and outside the trough can be secured. The temperature rise and the pressure difference between inside and outside the trough can be reduced. Further, since the vent hole 25 on the upper surface of the trough lid 3 is formed in the overhanging portion 23 that projects outward from the side wall 7 of the trough main body 1, there is little possibility that rainwater or the like flows into the trough main body 1. Further, since the vent holes 25 of the trough lid 3 are formed on both sides of the trough lid 3 (only one side is acceptable), when using the top of the trough lid 3 as an evacuation passage, heels of high heels and the like are vent holes 25. There is little risk of falling into the room.

  In addition, it is preferable to form alternately the ventilation hole 25 formed in the overhang | projection part 23, and the ventilation hole 25 formed in the reinforcement rib 15a in the trough longitudinal direction. In this way, it is possible to further reduce the possibility of rainwater or the like flowing into the trough body 1.

  Further, the vent hole 25 formed in the reinforcing rib 15 a may be formed in a substantially inverted U shape reaching the lower end of the guide piece 17. In this way, the mold for molding the trough lid 3 can be simplified.

1A is a plan view, FIG. 1B is a side view, FIG. 1C is a front view, and FIG. 3D is a cross-sectional view taken along line DD of FIG. The expanded sectional view of the part of E of FIG.1 (D). The other embodiment of the trough concerning this invention is shown, (A) is a top view, (B) is a side view. The other embodiment of the trough which concerns on this invention is shown, (A) is a top view, (B) is a side view. An embodiment of the trough lid concerning the present invention is shown in the state where it covered the trough body, (A) is a sectional view and (B) is an expanded sectional view of the portion of B of (A).

Explanation of symbols

1: trough body 3: trough lid 5: bottom plate 7: side wall 9, 11: reinforcing rib 13: male connecting portion 15: reinforcing rib 17: guide piece 19: lower overlapping portion 21: vent hole 23 in trough main body 1: Overhang portion 25: Vent hole 27 of trough lid 3: Wall

Claims (5)

  A trough having a trough main body and a trough lid for covering the trough main body, wherein a vent hole communicating the inside and the outside of the trough main body is formed in an upper portion of a side wall of the trough main body.   The trough lid has an overhang portion that projects outward from a side wall of the trough body, and a vent hole that connects the lower side and the upper side of the trough lid is formed in the overhang portion. The trough with a vent according to 1.   The trough with a vent hole according to claim 2, wherein the vent hole of the trough body and the vent hole of the trough lid are alternately formed in the trough longitudinal direction.   A trough lid, wherein a vent hole communicating with a trough body is formed at a position corresponding to both sides or one side of the trough body when the trough body is covered.   5. The trough lid according to claim 4, wherein the vent hole is formed in a projecting portion that projects outward from the side wall of the trough body and a reinforcing rib having a guide piece for positioning the trough body at the lower end. .

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