Trough cover

Abstract

To provide a trough cover that allows for easy inspection of the inside of the trough while the trough cover is installed. [Solution] The trough cover 1 in the embodiment is a trough cover 1 provided on a trough 7 along a wall railing 8 having a steel base 80, and comprises a steel cover body 2. The cover body 2 has openings 21 whose longitudinal direction is the trough extension direction X, and a plurality of openings 21 are arranged at intervals in the trough width direction Y, the length of the openings 21 in the trough extension direction X is 75% or more of the length of the cover body 2 in the trough extension direction X, and the width of the openings 21 in the trough width direction Y is greater than or equal to the distance between adjacent openings 21, 21 in the trough width direction Y.

Description

Technical Field

[0001] The present invention relates to a trough lid provided in a trough along a wall railing having a steel base.

Background Art

[0002] Along the side of a railway track, wall railings are installed for the purposes of preventing falls, windbreaks, sound insulation, etc. On the track side of the wall railing, a trough may be provided for accommodating various cables used for power and communication.

[0003] With the aging of the concrete wall railings provided on existing structures such as floor slabs, there are cases where the aged wall railings are removed and new wall railings having a steel base are installed. The steel base is joined to an existing structure such as a floor slab by bolts or the like after the existing wall railing is removed. A receiving member is fixed to the wall railing, and one end of a concrete trough lid that covered the existing trough is placed on this receiving member.

[0004] Since the steel base is joined to an existing structure, when constructing the wall railing, on-site concrete placement is not required. However, in order to evaluate the soundness of the wall railing, it is necessary to inspect the joint between the steel base and the existing structure. Since the joint between the steel base and the existing structure is covered by the concrete trough lid, it is necessary to open and close the trough lid in order to inspect the inside of the trough. However, since the concrete trough lid has a predetermined weight in order to prevent scattering due to the running of the railway or wind, it takes time to open and close it manually. When using a heavy machine, although the trough lid becomes easier to open and close, there are restrictions on the working space on the railway line, and heavy machines are often not available. Also, during the day, since the railway is in operation, the work itself is difficult. Even at night when the railway is suspended, there is only a limited time from the last train to the first train. Therefore, it is difficult to open and close the concrete trough lid and perform member replacement after inspection. For this reason, a trough lid that allows easy inspection of the inside of the trough in the installed state is required.

[0005] Patent Document 1 discloses, for example, a technology related to a trough that utilizes a part of a wall railing. The technology disclosed in Patent Document 1 has a cable trough body having a substantially L-shaped cross-section, which is formed by a tunnel, road or railway side wall used as one side wall portion of the cable trough, and a bottom wall portion and the other side wall portion rising substantially vertically from one end in the width direction of the bottom wall portion. Stepped portions for mounting a trough cover are formed on the inside of one side wall portion of the side wall opposite the inside of the other side wall portion of the cable trough body. However, in the technology disclosed in Patent Document 1, since the cable trough body is covered by a cable trough cover, it is not possible to inspect the inside of the cable trough body with the cover installed.

[0006] The grating cover described in Patent Document 2 has a structure in which numerous grids are formed inside a substantially rectangular frame. Near the front and rear ends of the grating cover, a portion of the grid is cut out, and a steel plate with mounting holes is welded to the cutout portion of the grid to form a bolt fixing portion of the grating cover. On one side in the longitudinal direction of the grating cover, an L-shaped flange member is fixed so as to form a tongue-shaped projection of a length corresponding to the connection portion of the trough body. However, in the technology disclosed in Patent Document 2, the short direction of the inner space of the grid of the grating cover is aligned with the extension direction of the trough body. Therefore, when inspecting the inside of the trough by moving the line of sight along the extension direction of the trough body, the line of sight is easily obstructed by the grid, making it difficult to inspect the inside of the cable trough body with the cable trough cover installed. Furthermore, if filler material is filled inside the grid, it becomes impossible to inspect the inside of the cable trough body with the cable trough cover installed. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2007-282345 [Patent Document 2] Japanese Patent Publication No. 2022-048871 [Overview of the project] [Problems that the invention aims to solve]

[0008] Therefore, the present invention was devised in view of the above circumstances, and its objective is to provide a trough cover that allows easy inspection of the steel base located inside the trough while the trough cover is installed. [Means for solving the problem]

[0009] The trough cover according to the present invention is a trough cover provided on a trough along a wall railing having a steel base, comprising a steel cover body, the cover body having an opening whose longitudinal direction is the trough extension direction, the openings being arranged in a plurality at intervals in the trough width direction, the length of the openings in the trough extension direction being 75% or more of the length of the cover body in the trough extension direction, and the width of the openings in the trough width direction being greater than or equal to the distance between adjacent openings in the trough width direction. [Effects of the Invention]

[0010] According to the present invention, the lid body has an opening whose longitudinal direction is in the direction of trough extension, the length of the opening in the direction of trough extension is 75% or more of the length of the lid body in the direction of trough extension, and the width of the opening in the direction of trough width is greater than or equal to the distance between adjacent openings in the direction of trough width. This makes it less likely for the line of sight to be obstructed when inspecting the inside of the trough by moving the line of sight from the opening along the direction of trough extension. As a result, the inside of the trough can be easily inspected with the trough lid installed. This makes it easier to inspect the steel bases such as the base plates and connecting members of the wall parapet provided inside the trough, and thus the soundness of the wall parapet having a steel base can be easily determined. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 is an exploded perspective view showing the trough to which the trough cover is provided in the first embodiment. [Figure 2]Figure 2 is a plan view showing a trough on which a trough cover is provided in the first embodiment. [Figure 3] Figure 3 is a cross-sectional view showing the trough cut through the existing cover. [Figure 4] Figure 4 is a cross-sectional view showing the trough cut through the trough cover in the first embodiment. [Figure 5] Figure 5 is a bottom view showing the trough cover in the first embodiment. [Figure 6] Figure 6 is a plan view showing the lid body portion of the trough cover in the first embodiment. [Figure 7] Figure 7 is a front cross-sectional view showing the trough cover in the first embodiment. [Figure 8] Figure 8 is a cross-sectional view showing the vicinity of one end of the trough cover in the first embodiment. [Figure 9] Figure 9 is a cross-sectional view showing the vicinity of the other end of the trough cover in the first embodiment. [Figure 10] Figure 10(a) is a front cross-sectional view showing the fixing bracket for securing the trough cover in the first embodiment, and Figure 10(b) is a side cross-sectional view showing the fixing bracket for securing the trough cover in the first embodiment. [Figure 11] Figure 11 is a cross-sectional view showing the trough cut through the trough cover in the second embodiment. [Modes for carrying out the invention]

[0012] The following describes in detail, with reference to the drawings, embodiments for implementing a trough cover to which the present invention is applied.

[0013] <First Embodiment> As shown in Figures 1 and 2, the structure 9, such as a concrete slab, comprises, for example, multiple parapets 8 arranged in a row, and a trough 7 along the parapets 8. On the opposite side of the parapets 8, across the trough 7, for example, a railway line is provided. Hereinafter, the direction in which the trough 7 extends will be referred to as the trough extension direction X, and the direction intersecting the trough extension direction X will be referred to as the trough width direction Y.

[0014] The trough 7 houses the electric cable (not shown) of the railway line and the like. The trough 7 is provided with an existing concrete lid 71 without an opening and a trough lid 1. One side wall of the trough 7 is constituted by a wall height railing 8. The wall height railing 8 is provided with a lid receiving member 83 for placing the trough lid 1 and the existing lid 71. The other side wall 72 of the trough 7 is constituted by a part of the structure 9. The side wall 72 is provided with a lid receiving member 73 for placing the trough lid 1. The upper end of the side wall 72 has a stepped portion 74. The existing lid 71 is placed on the stepped portion 74. The upper surface of the structure 9, the upper surface of the existing lid 71, and the upper surface of the trough lid 1 are flush.

[0015] A plurality of wall height railings 8 are arranged side by side along the trough extending direction X. The lower end of the wall height railing 8 has a steel base 80 for joining to the structure 9. The steel base 80 is provided inside the trough 7 and has a base plate 81 and a joining member 82. The wall height railing 8 is provided with a base plate 81 at the lower end. The base plate 81 and the structure 9 are joined by a joining member 82 such as an anchor bolt.

[0016] One end side of the existing lid 71 on the side of the wall height railing 8 in the trough width direction Y is placed on the lid receiving member 83. The other end side of the existing lid 71 on the railway line side in the trough width direction Y is placed on the stepped portion 74.

[0017] One end portion 1a side of the trough lid 1 on the side of the wall height railing 8 in the trough width direction Y is placed on the lid receiving member 83. The other end portion 1b side of the trough lid 1 on the railway line side in the trough width direction Y is placed on the lid receiving member 73.

[0018] As shown in Figures 3 and 4, the cover support member 83 is formed in an L-shape in cross-section and has a mounting portion extending horizontally and a contact portion extending vertically downward from the mounting portion. The existing cover 71 and the trough cover 1 are placed on the mounting portion of the cover support member 83. The contact portion of the cover support member 83 has, for example, an elongated hole extending vertically and is joined to the wall railing 8 by a joining member such as a bolt. Since the cover support member 83 is joined to the wall railing 8 by a bolt or the like through the elongated hole, the mounting height to the wall railing 8 can be adjusted. When the trough cover 1 is placed on the cover support member 83, the upper surface of the trough cover 1 is flush with the upper surface of the structure 9 and the upper surface of the existing cover 71.

[0019] The cover support member 73 is formed in an L-shape in cross-section and has a mounting portion extending horizontally and a contact portion extending vertically downward from the mounting portion. The trough cover 1 is placed on the mounting portion of the cover support member 73. The contact portion of the cover support member 73 is joined to the side wall 72 by a joining member such as an anchor bolt. The mounting portion of the cover support member 73 is positioned higher than, for example, the upper surface of the stepped portion 74. Since the cover support member 73 is joined to the side wall 72 with an anchor bolt or the like, the mounting height to the side wall 72 can be adjusted. When the trough cover 1 is placed on the cover support member 73, the upper surface of the trough cover 1 can be made flush with the upper surface of the structure 9 and the upper surface of the existing cover 71.

[0020] As shown in Figure 5, the trough cover 1 comprises a plurality of steel cover body portions 2. The cover body portions 2 are arranged in a row in the trough extension direction X. The plurality of cover body portions 2 are connected to each other by connecting fittings 3 such as bolts and nuts. The connecting fittings 3 are positioned, for example, on the other end 1b side of the center of the trough cover 1. The illustrated trough cover 1 has four cover body portions 2. However, the trough cover 1 of the present invention may have only one cover body portion 2.

[0021] As shown in Figure 6, the lid body 2 has openings 21 whose longitudinal direction is the trough extension direction X. Multiple openings 21 are arranged at intervals in the trough width direction Y. The periphery of the openings 21 is formed by flange processing, creating a flange portion that rises downward.

[0022] The length L21 of the opening 21 in the trough extension direction X is 75% or more of the length L2 of the lid body 2 in the trough extension direction X. For example, the length L21 of the opening 21 is 210 mm, and the length L2 of the lid body 2 is 250 mm.

[0023] The width W21 of an opening 21 in the trough width direction Y is greater than or equal to the distance B between adjacent openings 21 in the trough width direction Y. For example, the width W21 of an opening 21 is 20 mm, and the distance B between openings 21 is 20 mm.

[0024] As shown in Figure 7, the lid body portion 2 has a main plate portion 22 in which the opening 21 is formed, a web portion 23 formed by bending both ends of the main plate portion 22 in the trough extension direction X downwards, and a lower flange portion 24 formed by bending the lower end of the web portion 23.

[0025] The main plate portion 22 has an embossed portion 25 that protrudes upward in the region between the openings 21. The embossed portion 25 functions as an anti-slip surface for pedestrians. The embossed portion 25 is formed, for example, in a rectangular shape when viewed from the planar direction.

[0026] A connecting fitting 3 is provided on the web portion 23.

[0027] As shown in Figure 5, a plate member 4 is provided on the lower flange portion 24 on one end 1a side of the trough cover 1. By adjusting the thickness of the plate member 4, when the trough cover 1 is placed on the cover support member 83, the upper surface of the trough cover 1 can be made flush with the upper surface of the structure 9 and the upper surface of the existing cover 71. Alternatively, as described above, by adjusting the mounting height of the cover support member 83 to the wall railing 8, the upper surface of the trough cover 1 can also be made flush with the upper surface of the structure 9 and the upper surface of the existing cover 71 when the trough cover 1 is placed on the cover support member 73.

[0028] The plate member 4 is positioned across the lower flange portions 24 of multiple lid body portions 2. The plate member 4 has an opposing plate portion 41 that faces the lower flange portion 24, and a connecting plate portion 42 that connects the opposing plate portions 41 to each other.

[0029] The opposing plate portion 41 has a projection 41a that protrudes from the erection plate portion 42 toward the other end 1b side opposite to the wall parapet 8 side in the trough width direction Y. The projection 41a is joined to the lower flange portion 24 by a joining member 43 such as a bolt and nut. In the trough width direction Y, the width of the erection plate portion 42 is shorter than the width of the opposing plate portion 41.

[0030] As shown in Figures 8, 9, 10(a), and 10(b), the trough cover 1 may be provided with fixing brackets 5 for fixing the cover body 2 to the cover receiving members 73 and 83. The fixing brackets 5 include an upper bracket 51 that is hooked onto the opening 21, a lower bracket 52 positioned below the cover receiving members 73 and 83, and an adjustment bracket 53 for adjusting the distance between the upper bracket 51 and the lower bracket 52. By adjusting the distance between the upper bracket 51 and the lower bracket 52, the fixing brackets 5 can sandwich and fix the main plate portion 22 of the cover body 2 to the cover receiving members 73 and 83. The adjustment bracket 53 is composed of, for example, a bolt 53a and a nut 53b.

[0031] The upper fitting 51 is formed in a plate shape. The upper fitting 51 has claw portions 51a that protrude downward at both ends in the trough width direction Y. The claw portions 51a are hooked onto the opening 21. The heads of the bolts 53a of the adjustment fitting 53 are provided on the upper surface side of the upper fitting 51.

[0032] The lower fitting 52 is made of a plate material with a U-shaped cross-section when viewed from the trough width direction Y. The lower fitting 52 is formed with an L-shaped cross-section when viewed from the trough extension direction X. A nut 53b of the adjustment fitting 53 is provided on the lower surface side of the lower fitting 52.

[0033] The shaft of bolt 53a passes through the upper fitting 51 and the lower fitting 52. The head of bolt 53a and the nut 53b are positioned with the upper fitting 51 and the lower fitting 52 in between. The adjustment fitting 53 can adjust the distance between the upper fitting 51 and the lower fitting 52 by screwing the nut 53b onto the bolt 53a.

[0034] In the trough extension direction X, the length L21 of the opening 21 is longer than the length of the claw portion 51a. Therefore, the position where the claw portion 51a of the fixing bracket 5 is attached in the trough extension direction X can be adjusted within the opening 21.

[0035] Next, the effects and advantages of this embodiment will be described.

[0036] According to this embodiment, the lid body 2 has an opening 21 whose longitudinal direction is in the trough extension direction X, the length L21 of the opening 21 in the trough extension direction X is 75% or more of the length L2 of the lid body in the trough extension direction X, and the width W21 of the opening 21 in the trough width direction Y is greater than or equal to the distance B between adjacent openings 21 in the trough width direction Y. This makes it less likely for the line of sight to be obstructed when inspecting the inside of the trough 7 by moving the line of sight from the opening 21 along the trough extension direction X. For this reason, the inside of the trough 7 can be easily inspected with the trough lid 1 installed. Since it is easier to inspect the steel base 80 such as the base plate 81 and connecting members 82 of the wall parapet 8 provided inside the trough 7, the soundness of the wall parapet 8 having the steel base 80 can also be easily determined.

[0037] According to this embodiment, multiple lid body portions 2 are arranged in a row in the trough extension direction X, and the multiple lid body portions 2 are connected to each other. By connecting the multiple lid body portions 2, the trough cover 1 can be unitized. Therefore, the trough cover 1 can be easily attached to and detached from the trough 7.

[0038] According to this embodiment, the lid body 2 has a main plate portion 22 in which the opening 21 is formed, a web portion 23 formed by bending both ends of the main plate portion 22 in the trough extension direction X downwards, and a lower flange portion 24 formed by bending the lower end of the web portion 23. A plate member 4 is provided on the lower flange portion 24 on the side of one end 1a, which is on the wall railing 8 side. As a result, when the trough lid 1 is placed on the lid receiving member 83, the upper surface of the existing lid 71 and the upper surface of the trough lid 1 can be made flush. Since there is no step between the upper surface of the existing lid 71 and the upper surface of the trough lid 1, it becomes easier for workers to walk on the trough lid 1.

[0039] According to this embodiment, multiple lid body portions 2 are arranged in a row in the trough extension direction X, and the plate member 4 is positioned across the lower flange portions 24 of the multiple lid body portions 2. As a result, the multiple lid body portions 2 are connected. Therefore, the trough cover 1 can be easily attached to and detached from the trough 7.

[0040] According to this embodiment, the plate member 4 has an opposing plate portion 41 that faces the lower flange portion 24, and an interlocking plate portion 42 that connects the opposing plate portions 41. This improves the rigidity of the lid body portion 2.

[0041] According to this embodiment, the opposing plate portion 41 has a projection portion 41a that protrudes more than the erection plate portion 42 toward the other end 1b opposite to the one end 1a in the trough width direction Y. By positioning the erection plate portion 42 toward the one end 1a side than the projection portion 41a, the line of sight is less likely to be obstructed by the erection member 42, and the area below the opening 21 becomes easier to see. Therefore, the inside of the trough 7 can be inspected even more easily with the trough cover 1 installed.

[0042] According to this embodiment, the lower flange portion 24 is joined to the projection portion 41a by a joining member 43. This allows the distance from one end portion 1a of the trough cover 1 to the joining member 43 to be increased. Therefore, when one end portion 1a of the trough cover 1 is placed on the cover support member 83, interference between the joining member 43 and the cover support member 83 can be suppressed.

[0043] According to this embodiment, the plate member 4 is placed on a lid receiving member 83 fixed to the wall railing 8, and is equipped with fixing fittings 5 ​​for fixing the lid body 2 to the lid receiving members 73 and 83. The fixing fittings 5 ​​include an upper fitting 51 that is hooked onto the opening 21, a lower fitting 52 positioned below the lid receiving members 73 and 83, and an adjustment fitting 53 for adjusting the distance between the upper fitting 51 and the lower fitting 52. This prevents the trough cover 1 from coming off the trough 7 due to wind pressure or the like.

[0044] <Second Embodiment> Next, the trough cover 1 in the second embodiment will be described. As shown in Figure 11, in the trough cover 1 of the second embodiment, the width W21 of the opening 21 is greater than or equal to the width B81 of the base plate 81 in the trough width direction Y. In this case, the inside of the trough 7 can be inspected even more easily with the trough cover 1 installed.

[0045] In the trough cover 1, for example, the width W21 of the opening 21 is 300 mm, and the width B81 of the base plate 81 is 300 mm.

[0046] Although several embodiments of this invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. Furthermore, this invention can be implemented in various novel forms in addition to the embodiments described above. Therefore, the above embodiments can be omitted, replaced, or modified in various ways without departing from the spirit of this invention. Such novel forms and modifications are included in the scope and spirit of this invention, as well as in the claims and equivalents of the claims. [Explanation of Symbols]

[0047] 1: Trough cover 1a: One end 1b:Other end 2: Lid body part 21: Opening 22: Main plate part 23: Web Department 24: Lower flange section 25: Embossed part 3: Connecting hardware 4: Plate member 41: Opposing plate section 41a:Protruding piece 42:Erection plate part 43: Joining member 5: Fixing hardware 51: Upper fitting 51a: Claw part 52: Lower fitting 53: Adjustment hardware 53a: Bolt 53b: Nut 54b: Nut 7: Trough 71: Existing lid 72: Side wall 73: Lid support member 74: Stepped section 8: Wall railing 80: Steel base 81: Base plate 82: Joining member 83: Lid support member 9: Structure B: Separation distance X: Direction of trough extension Y: Trough width direction

Claims

1. A trough cover provided on a trough along a wall railing having a steel base, Equipped with a steel lid body, The lid body has an opening whose longitudinal direction is the direction of trough extension, Multiple openings are arranged at intervals in the trough width direction. The length of the opening in the trough extension direction is 75% or more of the length of the lid body in the trough extension direction. The width of the opening in the trough width direction is greater than or equal to the distance between adjacent openings in the trough width direction. A trough cover characterized by the following features.

2. The aforementioned lid body portions are arranged in a row in the direction of trough extension, The adjacent lid body portions are connected to each other. A trough cover according to claim 1, characterized by the above.

3. The lid body portion is, The main plate portion in which the opening is formed, The web portion is formed by bending both ends of the main plate portion in the direction of trough extension downwards, It has a lower flange portion formed by bending the lower end of the web portion, A plate member is provided on the lower flange portion on the side of the wall railing that is on the wall railing side. A trough cover according to claim 1, characterized by the above.

4. The aforementioned lid body portions are arranged in a row in the direction of trough extension, The plate member is arranged to span across the lower flange portions of multiple lid bodies. A trough cover according to claim 3, characterized by the above.

5. The aforementioned plate member is The opposing plate portion facing the lower flange portion, It has a framing plate section that connects the opposing plate sections, The opposing plate portion has a projection that protrudes more than the erection plate portion toward the other end opposite to the one end in the trough width direction. A trough cover according to claim 3, characterized by the above.

6. The lower flange portion is joined to the protruding portion by a joining member. A trough cover according to claim 5, characterized by the above.

7. The plate member is placed on a lid support member fixed to the wall railing, The lid body is provided with a fixing bracket for fixing it to the lid receiving member, The aforementioned fixing bracket is An upper fitting that is hooked onto the aforementioned opening, A lower fitting positioned below the lid receiving member, It has an adjustment fitting for adjusting the distance between the upper fitting and the lower fitting. A trough cover according to claim 3, characterized by the above.

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