Gutter cover

Abstract

A trench cover including a main member formed by shaping a plate material, providing a trench cover with improved formability and safety. 【Solution means】The main member 10 of the trench cover 1 includes a pair of inclined portions 17, 17 that extend outward and upward from the upper end of the leg portion 11 and form a V-shaped valley portion 12, and a pair of curved portions 18, 18 formed between one side 13 or the other side 14 of the plate material from the upper ends of the pair of inclined portions 17, 17, respectively. The pair of curved portions 18, 18 each curve and extend inward on one side 13 and the other side 14 of the plate material, and form an upper opening 19 having a width (W2) narrower than the maximum width (W1) of the groove portion 15 at the upper portion of the groove portion 15.

Description

Technical Field

[0001] The present invention relates to a trench cover, and more particularly to a trench cover provided with a main member formed by shaping a plate material.

Background Art

[0002] Conventional general trench covers (gratings) are configured by arranging a large number of main members in parallel at regular intervals within a frame member of a predetermined shape and crimping and fixing twist bars, which are connecting members, in a lattice pattern perpendicular to the upper surface (see, for example, Patent Document 1 (Japanese Utility Model Laid-Open No. 6-53685)). Since this conventional trench cover crimps and welds the connecting members from the upper surface side of a large number of main members arranged in parallel, the construction method is relatively simple. However, it has been pointed out that the twist bars of the connecting members are inevitably exposed on the surface of the trench cover, impairing the appearance.

[0003] On the other hand, there is a trench cover that uses a main member formed by bending and overlapping plate materials such as stainless steel. For example, the applicant of the present application has also disclosed in Patent Document 2 (Japanese Patent No. 4774222) a trench cover (10) in which main members (20) are arranged side by side at regular intervals. In the main member (20), a portion formed by shaping and bending and overlapping plate materials is used as a leg portion (27), and a groove portion (24) is formed in the upper portion of the leg portion by one side (22) and the other side (23) of the plate material (21) via a V-shaped valley portion (25) near the upper end of the leg portion.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] The inventor of the present invention has earnestly studied to further improve the performance of such a trench cover, and as a result, particularly from the viewpoints of formability and safety, it has been conceived that there is room for improvement in the form of the main member constituting the trench cover. Therefore, in view of the above problems, the present invention aims to provide a trench cover provided with a main member formed by molding a plate material, which has higher formability and safety.

Means for Solving the Problems

[0006] What achieves the above object is as follows. (1) A trench cover in which main members formed by molding and folding a plate material with the folded and overlapped portions as legs are arranged side by side at regular intervals, and a groove portion is formed in the upper part of the legs by one side and the other side of the plate material through a V-shaped valley portion near the upper end of the legs, a through hole is formed in the leg of the main member, a connecting pipe is inserted through the through hole and caulked before and after the through hole to form a deformed portion, and the main member is fixed to the connecting pipe by the deformed portion, and the main member extends outward and upward from the upper end of the leg, and includes a pair of inclined portions forming the V-shaped valley portion, and a pair of curved portions formed between the upper ends of the pair of inclined portions on one side or the other side of the plate material, each of the pair of curved portions curves and extends inward on one side and the other side of the plate material, and an upper opening portion having a width (W2) narrower than the maximum width (W1) of the groove portion is formed at the upper part of the groove portion.

[0007] (2) The trench cover according to (1) above, wherein the groove portion of the main member is filled with a filler. (3) The trench cover according to (1) or (2) above, wherein an edge portion is not formed on the outer surface of the main member between the upper ends of the pair of inclined portions and reaching one side and the other side of the plate material through each of the pair of curved portions. (4) The trench cover according to any one of (1) to (3) above, wherein the width (W2) of the upper opening portion of the groove portion formed by the pair of curved portions is 0.65 to 0.85 times the maximum width (W1) of the groove portion. (5) The vertical dimension (H2) from the maximum width portion of the groove portion to the upper end of the curved portion is 0.45 to 0.70 times the vertical dimension (H1) from the upper end of the leg portion (the lower end of the V-shaped groove portion) to the maximum width portion of the groove portion. The trench cover according to any one of (1) to (4) above.

[0008] Also, those that achieve the above object are as follows. (6) A trench cover in which a main member formed by forming and bending a sheet material and stacking the bent portions as leg portions, and forming a groove portion on the upper portion of the leg portion by one side and the other side of the sheet material through a V-shaped groove portion near the upper end of the leg portion, is arranged in parallel at regular intervals, A through hole is formed in the leg portion of the main member, a connecting pipe is inserted through the through hole and caulked before and after the through hole to form a deformed portion, and the main member is fixed to the connecting pipe by the deformed portion, and The main member extends outward and upward from the upper end of the leg portion, and includes a pair of inclined portions forming the V-shaped groove portion, and a pair of curved portions formed between one side or the other side of the sheet material from the upper ends of the pair of inclined portions, Each of the pair of curved portions curves and extends inward on one side and the other side of the sheet material, and forms an upper opening portion having a narrower width (W2) than the maximum width (W1) of the groove portion at the upper portion of the groove portion, An edge portion is not formed on the outer surface of the main member between the upper ends of the pair of inclined portions and reaching one side and the other side of the sheet material through each of the pair of curved portions, The trench cover in which a filling material is filled in the groove portion of the main member.

[0009] Also, those that achieve the above object are as follows. (7) A trench cover in which a main member formed by forming and bending a sheet material and stacking the bent portions as leg portions, and forming a groove portion on the upper portion of the leg portion by one side and the other side of the sheet material through a V-shaped groove portion near the upper end of the leg portion, is arranged in parallel at regular intervals, A through-hole is formed in the leg portion of the main member, and a connecting pipe is inserted through the through-hole and caulked before and after the through-hole to form a deformed portion. The main member is fixed to the connecting pipe by the deformed portion, and the main member extends outward and upward from the upper end of the leg portion, and includes a pair of inclined portions forming the V-shaped valley portion, and a pair of curved portions formed between one side or the other side of the plate material from the upper ends of the pair of inclined portions, each of the pair of curved portions curves and extends inward on one side and the other side of the plate material, and forms an upper opening portion having a width (W2) narrower than the maximum width (W1) of the groove portion at the upper portion of the groove portion. The width (W2) of the upper opening portion of the groove portion formed by the pair of curved portions is 0.65 to 0.85 times the maximum width (W1) of the groove portion, and the vertical dimension (H2) from the maximum width portion of the groove portion to the upper end of the curved portion is 0.45 to 0.70 times the vertical dimension (H1) from the upper end of the leg portion (the lower end of the V-shaped valley portion) to the maximum width portion of the groove portion, no edge portion is formed on the outer surface of the main member between the upper ends of the pair of inclined portions and reaching one side and the other side of the plate material through each of the pair of curved portions, a groove cover in which a filling material is filled in the groove portion of the main member.

Effect of the Invention

[0010] In the groove cover of the present invention, the main member extends outward and upward from the upper end of the leg portion, and includes a pair of inclined portions forming a V-shaped valley portion, and a pair of curved portions formed between one side or the other side of the plate material from the upper ends of the pair of inclined portions. Each of the pair of curved portions curves and extends inward on one side and the other side of the plate material, and forms an upper opening portion having a width (W2) narrower than the maximum width (W1) of the groove portion at the upper portion of the groove portion. Thereby, in the groove cover provided with the main member formed by molding the plate material, the moldability and safety are further enhanced.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

DETAILED DESCRIPTION OF THE INVENTION

[0012] The manhole cover of the present invention will be described using the embodiments shown in the drawings. As shown in FIGS. 1 to 6, the manhole cover 1 of the present invention is a manhole cover in which main members 10 are arranged in parallel at regular intervals. The main member 10 is formed by molding and folding a plate material, with the folded and overlapped part serving as the leg portion 11. A groove portion 15 is formed at the upper part of the leg portion 11 by one side 13 and the other side 14 of the plate material via a V-shaped valley portion 12 near the upper end of the leg portion 11. A through hole 16 is formed in the leg portion 11 of the main member 10 of the manhole cover 1, and a connecting pipe 30 is inserted through the through hole 16 and caulked before and after the through hole 16 to form a deformed portion 31. The main member 10 is fixed to the connecting pipe 30 by the deformed portion 31. The main member 10 extends outward and upward from the upper end of the leg portion 11, and includes a pair of inclined portions 17, 17 forming the V-shaped valley portion 12, and a pair of curved portions 18, 18 formed between one side 13 or the other side 14 of the plate material from the upper ends of the pair of inclined portions 17, 17. The pair of curved portions 18, 18 each curve and extend inward on one side 13 and the other side 14 of the plate material, and form an upper opening 19 having a width (W2) narrower than the maximum width (W1) of the groove portion 15 at the upper part of the groove portion 15.

[0013] As shown in Fig. 1, the manhole cover 1 of this invention includes frame members 20, 20 (here, a pair of frame members 20, 20 arranged in parallel) made of stainless steel, castings, etc. that define a part of the outer shape of a predetermined manhole cover, a main member 10 provided within the frame members 20, 20, and a connecting pipe 30. Details of the main member 10 will be described later.

[0014] The manhole cover 1 includes a plurality of main members 10 arranged side by side, and a connecting pipe 30 inserted through through-holes 16 formed in legs 11 of the main members 10. As shown in Figs. 5 and 6, the connecting pipe 30 is caulked before and after the through-hole 16 to form a deformed part 31, and the main member 10 is fixed to the connecting pipe 30 by the deformed part 31. As the connecting pipe, stainless steel or the like can be used, and a caulked part (the deformed part 31 including a deformed part 31a described later) can be formed by pressing or the like. Note that if a dedicated jig is used, the caulked part (the deformed part 31 including a deformed part 31a described later) can be formed in large quantities at once, the processing speed is significantly increased, and the cost can be greatly reduced. For example, when the diameter of the through-hole formed in the leg of the main member is about 9 mm, the diameter of the connecting pipe is 8 mm, and the height of the caulked part (the deformed part 31a, which is the maximum deformed part formed before and after the through-hole 16 in the deformed part 31 as shown in Fig. 5) is preferably about 10 mm, but it is not limited thereto.

[0015] In this embodiment, as shown in Figs. 2 to 4, as an example of the main member, a main member 10 is used in which a plate material such as stainless steel is formed and bent and overlapped at the lower end to form legs 11, and a groove 15 is formed above the legs 11 by one side 13 and the other side 14 of the plate material through a V-shaped valley part 12 at the upper end of the legs 11. Since a plate material such as stainless steel is used as the main member 10, the weight of the manhole cover 1 itself is reduced, and it becomes easier to handle.

[0016] The main member 10 extends outward and upward from the upper end of the leg portion 11 and includes a pair of inclined portions 17, 17 that form a V-shaped valley portion 12. Further, the main member 10 includes a pair of curved portions 18, 18 formed between one side 13 and the other side 14 of the plate material from the upper ends of the pair of inclined portions 17, 17 respectively. And in the main member 10 of this embodiment, an edge portion is not formed on the outer surface of the main member 10 from the upper end of each of the pair of inclined portions 17, 17 until reaching one side 13 and the other side 14 of the plate material through each of the pair of curved portions 18, 18. In other words, in the main member 10 of this embodiment, the inclined portion 17 and the curved portion 18 are smoothly continuous, and the curved portion 18 is smoothly curved so that no edge portion (corner portion) is formed on the outer surface. Thereby, the moldability and safety of the trench cover 1 are further enhanced.

[0017] To prevent the subsequent-described filler 30 from falling off the main member 10, one side 13 and the other side 14 of the plate material of the main member 10 are formed by molding so as to slightly block the upper opening of the main member 10 (trench portion 15). That is, in the main member 10, as shown in FIG. 4, each of the pair of curved portions 18, 18 curves and extends inwardly at one side 13 and the other side 14 of the plate material, and forms an upper opening 19 having a narrower width (W2) than the maximum width (W1) of the trench portion 15 at the upper part of the trench portion 15. Note that the width (W2) of the upper opening 19 of the trench portion 15 formed by the pair of curved portions 18, 18 is preferably 0.65 to 0.85 times the maximum width (W1) of the trench portion. Thereby, as described later, when the trench portion 15 is filled with the filler 40, while preventing the filler 40 from falling off the trench portion 15, the surface area of the filler 40 on the upper part (upper surface) of the trench cover 1 can be ensured, and its anti-slip effect can be effectively obtained.

[0018] In addition, in the main member 10 of the present embodiment, as shown in FIG. 4, it is preferable that the vertical dimension (H2) from the maximum width portion of the groove portion 15 to the upper end of the curved portion 18 is 0.45 to 0.70 times the vertical dimension (H1) from the upper end of the leg portion 11 (the lower end of the V-shaped groove portion 12) to the maximum width portion of the groove portion 15. Thereby, it is possible to suppress the volume in the groove portion 15 from becoming larger than necessary, reduce the amount of the filling material 40 filled in the groove portion 15, and reduce the manufacturing cost of the groove lid 1. The dimensional relationship between H1 and H2 as described above is such that in the main member 10 of the present embodiment, the maximum width portion of the groove portion 15 is defined in the vicinity of the upper end of the inclined portion 17 (in the vicinity of the boundary between the inclined portion 17 and the curved portion 18), and the curved portion 18 curves inward from the maximum width portion and extends, which is preferably realized by such a structure.

[0019] Although not shown in the figure, spot-shaped welded portions may be formed at regular intervals in the V-shaped groove portion 12 in the groove portion 15 to fix the groove portion 15 and the leg portion 11. Further, it is preferable that the through hole 16 and the spot-shaped welded portion are formed at substantially the same position in the horizontal direction. Thereby, the leg portion 11 of the main member is fixed at the caulked portion (deformed portions 31 and 31a), and further, the V-shaped groove portion 12 and the leg portion 11 of the main member are fixed at the spot-shaped welded portion. Therefore, even if a large force is applied to the groove lid, the main member does not deform, and the strength of the entire groove lid can be improved. Note that the spot-shaped welded portion is optimal for fixing the V-shaped groove portion in the groove portion of the main member because the generation of distortion due to welding is small.

[0020] As shown in FIGS. 1 and 5, in the groove lid 1 of the present embodiment, the groove portion 15 of the main member 10 is filled with the filling material 40. The filling material 40 is for increasing the surface area of the groove lid 1 to provide an anti-slip effect for people, vehicle tires, etc., and for enhancing the wear resistance and strength of the groove lid 1, and it is desirable that the filling material 40 is filled so as to slightly bulge from the upper surface of the main member 10.

[0021] As the filler 40, a sand-like non-slip material or the like can be used. For example, the sand-like non-slip material is composed of a mixture of sand-like ceramics and a synthetic resin material. As the sand-like ceramics, a granular inorganic material is used, and as the synthetic resin, it is desirable to use an epoxy resin or the like as a binder for the sand-like ceramics. The sand-like ceramics and the synthetic resin material are appropriately blended according to the durability required for the trench cover 1. At that time, by adding a desired pigment or the like for coloring, the surface of the trench cover 1 can be beautifully configured and its aesthetic appearance can be significantly improved.

Explanation of Reference Numerals

[0022] 1 Trench cover 10 Main member 11 Leg portion 12 V-shaped groove portion 13 One side 14 The other side 15 Trench portion 16 Through hole 17 Inclined portion 18 Curved portion 19 Upper opening 30 Connecting pipe 31 Deformed portion 40 Filler

Claims

1. A groove cover in which main members are arranged side by side at regular intervals. Each main member is formed by shaping a plate material and folding and stacking parts to form legs, and a groove portion is formed in the upper part of the legs by one side and the other side of the plate material via a V-groove portion near the upper end of the legs. A through-hole is formed in the leg of the main member, a connecting pipe is inserted through the through-hole and caulked before and after the through-hole to form a deformed portion, and the main member is fixed to the connecting pipe by the deformed portion. The main member extends outward and upward from the upper end of the leg, and includes a pair of inclined portions forming the V-groove portion, and a pair of curved portions formed between one side and the other side of the plate material from the upper end of each of the pair of inclined portions. Each of the pair of curved portions curves and extends inward on one side and the other side of the plate material, and forms an upper opening portion having a narrow width (W2) smaller than the maximum width (W1) of the groove portion at the upper part of the groove portion. The groove cover is characterized by the above.

2. The groove cover according to claim 1, wherein a filler is filled in the groove portion of the main member.

3. The groove cover according to claim 1 or 2, wherein an edge portion is not formed on the outer surface of the main member between the upper ends of the pair of inclined portions and reaching one side and the other side of the plate material through each of the pair of curved portions.

4. The groove cover according to claim 1 or 2, wherein the width (W2) of the upper opening portion of the groove portion formed by the pair of curved portions is 0.65 to 0.85 times the maximum width (W1) of the groove portion.

5. The groove cover according to claim 1 or 2, wherein the vertical dimension (H2) from the maximum width portion of the groove portion to the upper end of the curved portion is 0.45 to 0.70 times the vertical dimension (H1) from the upper end of the leg (the lower end of the V-groove portion) to the maximum width portion of the groove portion.

6. A groove cover in which main members are arranged side by side at regular intervals. Each main member is formed by shaping a plate material and folding and stacking parts to form legs, and a groove portion is formed in the upper part of the legs by one side and the other side of the plate material via a V-groove portion near the upper end of the legs. A through-hole is formed in the leg of the main member, a connecting pipe is inserted through the through-hole and caulked before and after the through-hole to form a deformed portion, and the main member is fixed to the connecting pipe by the deformed portion. The main member extends outwardly and upwardly from the upper end of the leg portion, and includes a pair of inclined portions that form the V-shaped valley portion, and a pair of curved portions formed between one side or the other side of the plate material from the upper end of each of the pair of inclined portions. Each of the pair of curved portions curves and extends inwardly on one side and the other side of the plate material, and forms an upper opening portion having a narrower width (W2) than the maximum width (W1) of the groove portion at the upper portion of the groove portion. An edge portion is not formed on the outer surface of the main member between the upper ends of each of the pair of inclined portions and reaching one side and the other side of the plate material through each of the pair of curved portions. The groove portion of the main member is filled with a filler. A groove cover characterized by the above.

7. A groove cover in which a portion of a plate material formed by forming and folding is used as a leg portion, and main members having groove portions formed at the upper portion of the leg portion by one side and the other side of the plate material through a V-shaped valley portion near the upper end of the leg portion are arranged in parallel at regular intervals. A through hole is formed in the leg portion of the main member, a connecting pipe is inserted through the through hole and caulked before and after the through hole to form a deformed portion, and the main member is fixed to the connecting pipe by the deformed portion. The main member extends outwardly and upwardly from the upper end of the leg portion, and includes a pair of inclined portions that form the V-shaped valley portion, and a pair of curved portions formed between one side or the other side of the plate material from the upper end of each of the pair of inclined portions. Each of the pair of curved portions curves and extends inwardly on one side and the other side of the plate material, and forms an upper opening portion having a narrower width (W2) than the maximum width (W1) of the groove portion at the upper portion of the groove portion. The width (W2) of the upper opening portion of the groove portion formed by the pair of curved portions is 0.65 to 0.85 times the maximum width (W1) of the groove portion, and the vertical dimension (H2) from the maximum width portion of the groove portion to the upper end of the curved portion is 0.45 to 0.70 times the vertical dimension (H1) from the upper end of the leg portion (the lower end of the V-shaped valley portion) to the maximum width portion of the groove portion. An edge portion is not formed on the outer surface of the main member between the upper ends of each of the pair of inclined portions and reaching one side and the other side of the plate material through each of the pair of curved portions. The groove portion of the main member is filled with a filler. A groove cover characterized by the above.

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