Structure for attaching grating lid onto resin trough body; trough track; trough track forming method; and grating lid

Patent metadata

Field	Value
Publication number	US-12334720-B2
Application number	US-202318119582-A
Country	US
Kind code	B2
Filing date	Mar 9, 2023
Priority date	Sep 15, 2020
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

Abstract

This resin trough body has an approximately U-shape cross-sectional shape that includes a bottom section and side sections on the two sides. Vertical reinforcement ribs are formed at a prescribed interval on the outer surface of both side sections of a trough body of a prescribed length. Further, near the front and back ends of the trough body, horizontal ribs are formed so as to link two vertical ribs. An accommodation space for accommodating a grating lid is formed by a pair of L-shape members being fixed with bolts to a fixing jig that has been attached to the horizontal ribs. The grating lid is accommodated in said accommodation space, and the grating lid is fixed to a bolt fixing section, which is a mounting hole formed in the horizontal plane of the L-shape members.

First claim

What is claimed is:

1. A structure for attaching a grating lid onto a trough body that is made of resin, the trough body comprising:
a substantially U-shaped cross section having a bottom section and two side sections, wherein
vertical ribs for reinforcement are formed at regular intervals on outer faces of both side sections of the trough body having a predetermined length;
the two vertical ribs are formed in proximities of each of front and back ends of the trough body and a horizontal rib for attaching an L-shape member is formed at the proximities of each of the front and back ends of the trough body so as to link the two vertical ribs;
the predetermined number of the vertical ribs are disposed at regular intervals between the vertical rib at the front end and the vertical rib at the back end of the trough body, and another horizontal rib is further formed at a bottom part of the side section of the trough body so as to link the vertical ribs;
L-shape members are disposed such that a horizontal surface of a steel material having an L-shape cross section of each of the L-shape members faces a metallic fixing member of the horizontal rib, the L-shape members covering top parts of the side sections of the trough body;
an accommodation space for accommodating the grating lid is formed by the L-shape members being fixed with bolts to the metallic fixing members attached to the horizontal ribs, and the grating lid is accommodated in the accommodation space; and
the grating lid is fixed to bolt fixing sections, which are mounting holes formed in the horizontal surfaces of the L-shape members.

2. The structure for attaching the grating lid onto the trough body according to claim 1 , the grating lid comprising:
a grating structure comprising a substantially rectangular frame body and multiple gratings that are formed inside the frame body, the gratings are formed of multiple flat steel plates and steel rods, the flat steel plates being disposed across long sides at regular intervals, being parallel to a short side direction and linking the long sides, and the steel rods being disposed over an upper surface of the lid at regular intervals, being parallel to a long side direction and linking the short sides;
the bolt fixing sections are formed at two predetermined positions at proximities of each of the front and back ends of the grating lid, wherein the positions are substantially symmetric in a width direction of the grating lid and do not interfere with the gratings, each of the bolt fixing sections being formed by welding to the positions a steel plate with a mounting hole formed with a mounting hole; and
an L-shape flange member that is bent into an L shape is welded to an outer surface of one short side of the frame body of the grating lid, the L-shape flange member being fixed forming a tongue-shaped projection that has a length equivalent to a connected part between the trough bodies.

3. The structure for attaching the grating lid onto the trough body according to claim 2 , wherein the grating lid is attached onto the trough body via the L-shape member by providing the metallic fixing member having a U-shaped cross section at the mounting portion for metallic fixing members of the horizontal rib, fixing the metallic fixing member and the L-shape member with a nut and a bolt for attachment, and fixing the grating lid to the L-shape member.

4. The structure for attaching the grating lid onto the trough body according to claim 3 , wherein with the L-shape member being attached via the metallic fixing member to the mounting portion for metallic fixing members of the trough body, another mounting hole, which is provided on the L-shape member being positioned on an inner side of the cross section of the trough body with respect to tip end parts of the both side sections of the trough body, and the steel plate with mounting hole of the grating lid, which is formed by welding the steel plate with the mounting hole to a back surface of the grating lid, are disposed so that positions of the holes match one another to fix the steel plate with the mounting hole to the L-shape member, thereby fixing the grating lid with bolts onto the trough body.

5. The structure for attaching the grating lid onto the trough body according to claim 4 , wherein inner parts of the gratings of the grating lid are filled with either by aggregate including at least one of ceramics and natural stones that is solidified by adhesive resin such as epoxy resin or urethane resin, or by mortar.

6. The structure for attaching the grating lid onto the trough body according to claim 1 , wherein instead of attaching the L-shape members for accommodating the grating lid, a resin-made trough lid can be fixed directly to the mounting portions for metallic fixing members of the horizontal ribs.

7. A structure for attaching a grating lid onto a trough body that is made of resin, the trough body comprising:
a substantially U-shaped cross section having a bottom section and two side sections, wherein
the trough body having a predetermined length is provided with a male fitting portion on one end and a female fitting portion on the other end, the male fitting portion and the female fitting portion being able to be fitted with each other;
the male fitting portion has a reduced diameter portion at which a cross section of the male fitting portion has a reduced diameter, and an enlarged diameter portion being formed at a tip end of the reduced diameter portion where the cross section is bent outward;
the female fitting portion has an enlarged diameter portion at which a cross section of the female fitting portion has an enlarged diameter for accommodating the male fitting portion, and a reduced diameter portion being formed at a tip end of the enlarged diameter portion where the diameter of the cross section is reduced;
vertical ribs for reinforcement are formed at regular intervals on outer faces of both side sections of the trough body having the predetermined length;
the two vertical ribs are formed in proximities of each of front and back ends of the trough body and a horizontal rib for attaching an L-shape member is formed at the proximities of each of the front and back ends of the trough body so as to link the two vertical ribs;
the predetermined number of the vertical ribs are disposed at regular intervals between the vertical rib at the front end and the vertical rib at the back end of the trough body, and another horizontal rib is further formed at a bottom part of the side section of the trough body so as to link the vertical ribs;
L-shape members are disposed such that a horizontal surface of a steel material having an L-shape cross section of each of the L-shape members faces a metallic fixing member of the horizontal rib, the L-shape members covering top parts of the side sections of the trough body;
an accommodation space for accommodating the grating lid is formed by the L-shape members being fixed with bolts to the metallic fixing members attached to the horizontal ribs, and the grating lid is accommodated in the accommodation space; and
the grating lid is fixed to bolt fixing sections, which are mounting holes formed in the horizontal surfaces of the L-shape members.

8. The structure for attaching the grating lid onto the trough body according to claim 7 , the grating lid comprising:
a grating structure comprising a substantially rectangular frame body and multiple gratings that are formed inside the frame body, wherein
the bolt fixing sections are formed at two predetermined positions at the front and back ends of the gratings, respectively, each of the bolt fixing sections being formed by notching a part of the gratings and welding to the notched part a steel plate with a mounting

Assignees

• Furukawa Electric Co Ltd

Inventors

• Manabe Hiroki
• Hori Takashi

Classifications

• E03F5/06

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• H02G2200/10

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• H02G3/0418

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• H02G3/0608

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