Cover structure for catch basin

Abstract

To provide a cover structure for catch basin capable of retaining necessary strength.SOLUTION: A cover structure for catch basin 10 that covers a top face opening 1a situated in a top face of a catch basin 1 includes a cover body 11 to be mounted to a marginal part of the top face opening 1a. The cover body 11 includes a cover board 11a in which openings 11a1 through which a liquid can pass are formed and a bridging section 11b that bridges marginal parts which the openings 11a1 face, where the bridging section 11b is formed such that a dimension in a height direction is larger than a dimension of the cover plate 11a in a thickness direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a catch basin cover structure that covers the upper opening of a catch basin installed in the side strip of, for example, an elevated bridge portion of a highway. [Background technology]

[0002] Conventionally, for example, in the roadside of an elevated bridge on a highway, a catch basin is installed to guide runoff such as rainwater from the road surface to a drainage pipe. A catch basin lid that allows the runoff to pass through is attached to an upper opening located on the upper surface of the catch basin.

[0003] A cover for a catch basin is made, for example, by forming a plurality of openings in a metal plate member to allow drainage water to pass through (see, for example, Patent Document 1).

[0004] When a vehicle temporarily travels along the side of the road where the catch basin is installed, the vehicle's tires may roll on the top surface of the catch basin cover, so the catch basin cover needs to be strong enough to withstand the weight of the vehicle. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 5-27150 Summary of the Invention [Problem to be solved by the invention]

[0006] However, conventional catch basin covers are formed by creating multiple openings in a metal plate, which means that there is a possibility that the strength of the portions between the openings where the width dimension is narrower may be insufficient.

[0007] An object of the present invention is to provide a catch basin cover structure capable of maintaining the required strength. [Means for solving the problem]

[0008] The catch basin lid structure of the present invention is a catch basin lid structure that covers an upper opening located on the upper surface of the catch basin, and is provided with a lid body that is attached to the edge of the upper opening, and the lid body has a cover plate having an opening through which liquid can pass, and a bridging portion that is bridged between the opposing edges of the opening, and the bridging portion is formed so that its height dimension is greater than its thickness dimension of the cover plate.

[0009] In addition, it is preferable that the catch basin lid structure of the present invention is provided with a detachment prevention portion provided on the underside of the lid body and which prevents the lid body from detaching from the catch basin by abutting the inner wall of the catch basin when the lid body is moved upward while tilted relative to the catch basin.

[0010] In addition, in the catch basin lid structure according to the present invention, it is preferable that the detachment prevention portion has a pair of abutment portions arranged at a distance from each other on the underside of the lid body.

[0011] In addition, in the catch basin cover structure according to the present invention, it is preferable that the detachment prevention portion has a connecting portion that connects the pair of abutment portions to each other. Effect of the Invention

[0012] According to the present invention, the central side of the cover plate, including the opening, is reinforced by the erection portion, making it possible to prevent damage such as deformation of the cover plate due to the weight of the vehicle. [Brief description of the drawings]

[0013] [Figure 1] 1 is a plan view of a catch basin cover structure and a catch basin according to one embodiment of the present invention. FIG. [Diagram 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 according to one embodiment of the present invention. [Diagram 3] FIG. 2 is a cross-sectional view taken along line BB of FIG. 1 according to one embodiment of the present invention. [Figure 4] 1 is a diagram showing the relationship between a catch basin cover structure and a catch basin according to one embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Figures 1 to 4 show one embodiment of the present invention. Figure 1 is a plan view of a catch basin cover structure and a catch basin, Figure 2 is a cross-sectional view taken along line AA in Figure 1, Figure 3 is a cross-sectional view taken along line BB in Figure 1, and Figure 4 is a diagram showing the relationship between the catch basin cover structure and the catch basin.

[0015] The catch basin cover structure 10 of the present invention is attached to a catch basin 1 installed in the side strip of an elevated bridge portion of a highway, for example.

[0016] The catch basin 1 is a metal box-shaped member formed by casting, and as shown in Figs. 1 to 3, an upper opening 1a is formed on the upper surface side, and a drainage pipe (not shown) is connected to the lower surface side. The catch basin 1 is embedded in the roadside belt so that the upper opening 1a located on the upper surface is flush with the upper surface of the roadside belt, and drainage such as rainwater from the road surface flows into the inside through the upper opening 1a, and the drainage that has flowed into the inside is guided to the drainage pipe. The longitudinal direction of the catch basin 1 in a plan view is directed in the extension direction of the road. At the edge of the upper opening 1a of the catch basin 1, a lid accommodating recess 1b is formed to accommodate a lid main body of the catch basin lid structure 10, which will be described later. The lid accommodating recess 1b is formed over the entire outer periphery of the upper opening 1a. As a result, the lid main body is fitted into the lid accommodating recess 1b.

[0017] As shown in Figures 1 to 3, the catchment bin lid structure 10 comprises a lid body 11 that fits into the lid accommodating recess 1b of the catchment bin 1, and a detachment prevention portion 12 that abuts against the inner wall of the catchment bin 1 to prevent the lid body 11 from detaching from the catchment bin 1 when the lid body 11 is tilted and moved upward relative to the catchment bin 1 installed on the roadside strip.

[0018] The lid body 11 has a lid plate 11a in which an opening 11a1 through which liquid can pass is formed, and a plurality of bridge portions 11b that bridge between opposing edges of the opening 11a1.

[0019] The cover plate 11a is made of a rectangular metal plate having a longitudinal dimension of 344 mm, a lateral dimension of 212 mm, and a thickness of 19 mm. A rectangular opening 11a1 having a longitudinal dimension of 230 mm and a lateral dimension of 138 mm is formed in the center of the cover plate 11a in the longitudinal and lateral directions by cutting the cover plate 11a by laser cutting, for example.

[0020] The multiple bridge parts 11b are arranged at intervals in the longitudinal direction of the opening 11a1 and extend in the lateral direction of the opening 11a1. Each of the multiple bridge parts 11b is made of a plate-like member formed with a longitudinal dimension of 138 mm, a lateral dimension of 38 mm, and a thickness dimension of 9 mm, and is joined by welding both ends in the longitudinal direction to the opposing edges of the opening 11a1 with the lateral direction of the plate-like member facing up and down. At this time, the multiple bridge parts 11b are joined to the edges of the opening 11a1 so that their upper ends are flush with the upper surface of the cover plate 11a. That is, the lower ends of the multiple bridge parts 11b protrude downward from the lower surface of the cover plate 11a, and the height size is formed to be larger than the thickness size of the cover plate 11a. Here, the wastewater flowing into the inside of the drainage basin 1 through the upper opening 1a passes between the edge of the opening 11a1 of the cover plate 11a and the erection portion 11b, and between adjacent erection portions 11b and 11b at the opening 11a1.

[0021] The detachment prevention portion 12 has a pair of contact portions 12a each extending downward from the lower surface of the lid body 11, and a connecting portion 12b connecting the pair of contact portions 12a.

[0022] The pair of abutment parts 12a are disposed at intervals from each other on both sides of the underside of the lid body 11 in the traveling direction of a vehicle traveling on a road. Each of the pair of abutment parts 12a is made of a plate-like member having, for example, a longitudinal dimension of 135 mm, a lateral dimension of 125 mm, and a thickness of 6 mm, and is joined by welding to the underside of the lid body 11 with the lateral direction facing the up-down direction. Each of the pair of abutment parts 12a is preferably disposed at an interval of 5 mm from the inner wall of the catch basin 1, for example, and is preferably long enough so that the lower end is located near the bottom of the catch basin 1 without contacting the bottom of the catch basin 1.

[0023] The connecting portion 12b connects one end portion in the width direction of each of the pair of abutting portions 12a to each other. The connecting portion 12b is made of a plate-like member having, for example, a longitudinal dimension of 230 mm, a lateral dimension of 100 mm, and a thickness dimension of 6 mm. The connecting portion 12b is disposed so that one end face in the lateral direction is flush with the lower end faces of the pair of abutting portions 12a, and both ends in the longitudinal direction are joined by welding to each of the pair of abutting portions 12a.

[0024] Here, a manufacturing method for the catch basin cover structure 10 will be described.

[0025] First, a metal plate is formed into a rectangular shape by laser cutting, and a rectangular opening 11a1 is formed in the center of the rectangular metal plate to form the cover plate 11a.

[0026] Next, the lid body 11 is formed by joining the multiple bridge portions 11b to the opening 11a1 of the lid plate 11a by welding.

[0027] On the other hand, the pair of abutting portions 12a and the connecting portion 12b are integrally formed by welding to form the detachment prevention portion 12.

[0028] Furthermore, the detachment prevention portion 12 is joined to the lower surface of the cover plate 11a of the cover body 11 by welding.

[0029] Finally, the entire outer surface of the integrally formed lid body 11 and detachment prevention portion 12 is deburred and then hot-dip galvanized.

[0030] When attaching the catch basin lid structure 10 configured as described above to the catch basin 1, the catch basin lid structure 10 is moved downward from directly above the top opening 1a of the catch basin 1, the detachment prevention part 12 is inserted into the inside of the catch basin 1 from the top opening 1a, and the lid body 11 is fitted into the lid accommodating recess 1b.

[0031] Furthermore, when removing the catch basin lid structure 10 from the catch basin 1, the catch basin lid structure 10 is moved upward relative to the catch basin 1, and the detachment prevention part 12 is pulled out to the outside of the catch basin 1 through the upper opening 1a.

[0032] In addition, since the catchment basin cover structure 10 is attached to a catchment basin 1 installed on the shoulder of a road such as a highway, when a vehicle travels on the shoulder of the road, the vehicle's tires T roll on the upper surface of the catchment basin cover structure 10.

[0033] At this time, the weight of the vehicle acts on the lid body 11 of the catch basin lid structure 10 via the tire T. However, the opening 11a1 of the lid plate 11a is spanned by a bridge portion 11b whose height dimension is greater than the thickness dimension of the lid plate 11a. Therefore, the central side of the lid body 11 in the longitudinal and lateral directions, including the opening 11a1, is reinforced by the multiple bridge portions 11b. Therefore, the lid body 11 is less likely to be damaged, such as deformed, even when the weight of the vehicle acts on it.

[0034] 4, the weight of the tire T is applied to the lid body 11 of the catch basin lid structure 10 on the front side in the traveling direction of the vehicle, so that a force acts on the rear side to bounce upward relative to the front side in the traveling direction of the vehicle. That is, a force acts on the lid body 11 of the catch basin lid structure 10 to move it upward while tilting it relative to the catch basin 1.

[0035] However, when lid body 11 is moved upward while tilting it relative to catch basin 1, abutment portion 12a of detachment prevention portion 12 abuts against the inner wall of catch basin 1, restricting the movement of lid body 11. This makes it possible to prevent lid body 11 from detaching from catch basin 1 when a force is applied to move lid body 11 upward while tilting it relative to catch basin 1.

[0036] Thus, according to the drainage manhole cover structure 10 of this embodiment, the drainage manhole cover structure 10 covers the upper opening 1a located on the upper surface of the drainage manhole 1, and is provided with a cover body 11 attached to the edge of the upper opening 1a, and the cover body 11 has a cover plate 11a having an opening 11a1 through which liquid can pass through, and a bridging portion 11b that bridges between the opposing edges of the opening 11a1, and the bridging portion 11b is formed so that its height dimension is greater than its thickness dimension in the cover plate 11a.

[0037] As a result, the central side of the cover plate 11a, including the opening 11a1, is reinforced by the bridge portion 11b, making it possible to prevent damage such as deformation of the cover plate 11a due to the weight of the vehicle.

[0038] It is also preferable to have a detachment prevention portion 12 provided on the underside of the lid body 11, which abuts against the inner wall of the drainage basin 1 when the lid body 11 is moved upward while tilted relative to the drainage basin 1, thereby preventing the lid body 11 from detaching from the drainage basin 1.

[0039] As a result, when a force acts on the lid body 11 to bounce up against the catch basin 1 and the lid body 11 moves upward in a tilted position relative to the catch basin 1, it is possible to prevent the lid body 11 from detaching from the catch basin 1 by abutting the anti-detachment portion 12 against the inner wall of the catch basin 1, and it is possible to prevent the top opening 1a of the catch basin 1 from being unintentionally opened.

[0040] Moreover, it is preferable that the detachment prevention portion 12 has a pair of abutment portions 12a arranged at a distance from each other on the lower surface side of the lid main body 11.

[0041] As a result, the abutment portions 12a are positioned on both sides of the underside of the lid body 11 in the direction of vehicle travel, so that even if the lid body 11 is tilted and moved upward from either end side in the direction of vehicle travel, the abutment portions 12a can be securely abutted against the inner wall of the catch basin 1, making it possible to more reliably prevent the lid body 11 from detaching from the catch basin 1.

[0042] Moreover, it is preferable that the detachment prevention portion 12 has a connecting portion 12b that connects the pair of contact portions 12a to each other.

[0043] As a result, by forming the pair of abutment portions 12a integrally with the connecting portion 12b, it is possible to reinforce each of the pair of abutment portions 12a, thereby making it possible to prevent damage to the detachment prevention portion 12 including the pair of abutment portions 12a.

[0044] In the above embodiment, the multiple bridging parts 11b each formed in a straight line are attached to the opening 11a1 of the cover plate 11a, but the present invention is not limited to this. The bridging parts may be, for example, lattice-shaped members as long as they can pass drainage and can be attached to the opening 11a1.

[0045] In the above embodiment, the pair of contact parts 12a are formed of plate-like members, but are not limited to plate-like members. The contact parts may be, for example, rod-like members extending downward from the lower surface of the lid body 11, as long as they contact the inner wall of the catch basin 1.

[0046] In addition, in the above embodiment, the connecting portion 12b that connects the pair of abutment portions 12a to each other is formed from a plate-shaped member, but this is not limited to this, and a band-shaped member with a predetermined width dimension or a rod-shaped member with a predetermined outer diameter dimension may also be used as the connecting portion. [Explanation of symbols]

[0047] 1. Drainage basin 1a Top opening 10. Drainage basin cover structure 11 Cover body 11a Cover plate 11a1 Opening 11b Erection part 12 Anti-separation part 12a Contact part 12b Connection part

Claims

1. A drainage basin cover structure for covering an upper opening located on an upper surface of the drainage basin, a lid body attached to an edge of the top opening, The lid body has a lid plate having an opening through which a liquid can pass, and a bridge portion that bridges between opposing edges of the opening, The bridge portion is formed so that the size in the height direction is larger than the size in the thickness direction of the cover plate. Cover structure for drainage basin.

2. A detachment prevention part is provided on the underside of the lid body, and when the lid body is moved upward while tilted relative to the drain basin, the detachment prevention part abuts against an inner wall of the drain basin to prevent the lid body from detaching from the drain basin. The catch basin cover structure according to claim 1.

3. The detachment prevention portion has a pair of abutment portions arranged at a distance from each other on the lower surface side of the lid body. The catch basin cover structure according to claim 2.

4. The detachment prevention portion has a connecting portion that connects the pair of contact portions to each other. The catch basin cover structure according to claim 3.

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