Drainage equipment lid

Abstract

To provide a drainage equipment lid having an inner lid, which can be opened and closed more reliably without increasing in size.SOLUTION: A drainage equipment lid 10 includes a lid body 30, a lid frame 20, an inner lid 40, a hinge metal fitting 50, and a hinge auxiliary tool 60. The hinge auxiliary tool 60 is rotatably supported by the lid frame 20 and engages with the hinge metal fitting 50 at an abutment position 64a. The hinge auxiliary tool 60 includes a root portion 62 and a tip portion 63. Since the tip portion 63 extends upward from a lower end of the root portion 62, the position of the lower end of the hinge auxiliary tool 60 is located higher than when the tip portion 63 extends straight from the lower end of the root portion 62. Therefore, interference between the inner lid 40 and the hinge auxiliary tool 60 is unlikely to occur. This makes it possible to open and close the drainage equipment lid 10 more reliably without increasing the size of the drainage equipment lid 10.SELECTED DRAWING: Figure 3A

Description

[Technical field]

[0001] The present invention relates to a cover for a drainage system. [Background technology]

[0002] For example, Patent Document 1 discloses a hinge structure for an underground structure cover such as a manhole cover. As shown in FIG. 10, the hinge structure A of the underground structure cover 100 connects the receiving frame 200 and the cover body 300 supported by the receiving frame 200 so as to be openable and closable. The hinge structure A includes a rod 400 connected to the inner circumference of the receiving frame 200 and capable of rotating in the vertical direction, a connecting body 500 suspended from the lower surface of the cover body 300 and capable of sliding along the longitudinal direction of the rod 400, and a restraining portion 410 formed by a protrusion provided at the tip of the rod 400 and restricting the disconnection of the connecting body 500. The connecting body 500 is suspended from the lower surface of the cover body 300 so as to be swingable. The rod 400 has a shape that extends straight upward from the receiving frame 200.

[0003] In the hinge structure A, when the lid body 300 is lifted by an operator, the connecting body 500 is pulled by the lid body 300 to move upward and move along the longitudinal direction of the rod 400. At this time, the rod 400 is pulled up by the connecting body 500 and rotates upward about the point supported by the receiving frame 200. When the lid body 300 is further lifted by the operator, the connecting body 500 abuts against the restraining portion 410 of the rod 400. When the lid body 300 is further lifted from this state, the rod 400 rotates further upward, and the lid body 300 can be opened while the lid body 300, the rod 400, the connecting body 500, and the receiving frame 200 are still connected to each other. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 08-109649 Summary of the Invention [Problem to be solved by the invention]

[0005] As described above, the lid body 300 is lifted with the connecting body 500 and the rod 400 connected. Therefore, in order to widen the range in which the lid body 300 can be moved, the connecting body 500 may be formed to be longer in the longitudinal direction than in the state of FIG. 10. When the longitudinal length of the connecting body 500 is further extended, in order for the connecting body 500 to be connected to the rod 400, the shape of the rod 400 must extend downward more than in FIG. 10. FIG. 11 shows a state in which the connecting body 500A, which has a longer longitudinal length than the connecting body 500, is connected to the rod 400. Incidentally, as shown in FIG. 11, an inner lid 600 may be disposed below the lid body 300. The inner lid 600 is detachably attached to the upper end of a pipe or the like disposed below the lid body 300. In such a case, if it is desired to further widen the range in which the lid body 300 can be moved, the shape of the rod 400 will be oriented further downward. Therefore, if an attempt is made to widen the range over which the lid body 300 can be moved, there is a risk that the rod 400 will interfere with the inner lid 600. If the rod 400 interferes with the inner lid 600, the rod 400 will get caught on the inner lid 600 and will be unable to rotate, which may hinder opening and closing of the lid body 300. By making the vertical distance between the hinge structure A and the inner lid 600 relatively wide, it is possible to prevent interference between the rod 400 and the inner lid 600, but in this case, the overall size of the underground structure lid 100 will increase.

[0006] The present invention has been made in consideration of these points, and its object is to provide a drainage equipment lid that has an inner lid and can be opened and closed more reliably without being large. [Means for solving the problem]

[0007] The drainage equipment lid of the present invention comprises a lid frame provided on a pipeline having an opening that opens upward, a lid body detachably attached to the lid frame, an inner lid disposed below the lid body and fitted into the opening of the pipeline, a hinge metal fitting rotatably supported on the lid body and extending downward from the lid body, and a hinge auxiliary device supported by the lid frame and engaging with the hinge metal fitting. The hinge auxiliary device comprises a support portion rotatably supported on the lid frame, a root portion extending downward from the support portion and toward the radial inside of the lid frame, and a tip portion bent upward from the lower end of the root portion.

[0008] According to the drainage equipment lid of the present invention, the hinge auxiliary includes a support portion, a base portion, and a tip portion. The hinge auxiliary is rotatably supported by the lid frame at the support portion. Since the hinge fitting is supported by the lid body, when the lid body is lifted by the worker, the hinge fitting is pulled by the lid body and moves upward. The hinge auxiliary engaged with the hinge fitting is pulled by the hinge fitting and rotates upward. Therefore, the worker can move the lid body upward with the lid body, the hinge fitting, the hinge auxiliary, and the lid frame connected. At this time, since the tip portion is bent upward from the lower end of the root portion, the position of the lower end of the hinge auxiliary is located higher than when the tip portion extends straight from the lower end of the root portion. Therefore, even if the root portion and the tip portion of the hinge auxiliary are formed relatively long, the hinge auxiliary does not interfere with the inner lid. Since the hinge auxiliary does not interfere with the inner lid, the worker can reliably open and close the drainage equipment lid. In this case, there is also no need to enlarge the drainage facility cover.

[0009] According to a preferred embodiment of the present invention, the lid frame includes a guide portion with which the support portion engages. The guide portion includes a first passage that opens to the radial inside of the lid frame and extends in the radial direction of the lid frame, a second passage that is connected to the first passage and extends downward from the first passage, and a third passage that is connected to a lower end of the second passage and extends in the radial direction of the lid frame.

[0010] According to this aspect, the lid frame is configured so that the hinge auxiliary tool can be attached and removed by the guide part. Since the hinge auxiliary tool can be removed, the worker is not hindered from performing work such as removing the inner lid by the hinge auxiliary tool.

[0011] According to a preferred embodiment of the present invention, the third passage includes a hinge auxiliary tool support portion that supports the hinge auxiliary tool, and the guide portion includes a stopper that protrudes from a lower surface of the third passage on a radially outer side of the lid frame than the hinge auxiliary tool support portion.

[0012] According to this aspect, when an operator moves the lid, the second support part is prevented from coming out of the third passage of the guide part regardless of the operator's intention, and therefore the operation of closing the lid is prevented from being hindered.

[0013] According to a preferred aspect of the present invention, the tip portion has a support surface that slidably supports the lid.

[0014] According to this aspect, the worker can close the drainage facility lid by sliding the lid body while the lid body is placed on the support surface. Therefore, the burden on the worker when closing the drainage facility lid is small.

[0015] According to a preferred embodiment of the present invention, the hinge has an upper end portion that abuts against the lid body. The hinge is disposed in a state in which the hinge extends radially outward from the lid frame when the upper end portion abuts against the lid body.

[0016] According to this aspect, the lower end of the hinge is positioned higher than when the hinge extends substantially vertically when the upper end is in contact with the lid, so that the hinge and the inner lid are less likely to interfere with each other.

[0017] According to a preferred aspect of the present invention, the length of the base portion in a longitudinal direction in a plan view is shorter than the length of the tip portion in a longitudinal direction in a plan view.

[0018] According to this aspect, since the length of the tip portion in the longitudinal direction in a plan view is longer than the length of the base portion in the longitudinal direction in a plan view, the hinge fitting and the hinge auxiliary device engage at a relatively high position, which allows the drainage equipment lid to have a relatively wide movable range without increasing its size.

[0019] According to a preferred aspect of the present invention, the root portion and the tip portion extend straight in their respective longitudinal directions, and the hinge metal fitting has a retaining portion that abuts against an underside of the root portion or the tip portion.

[0020] According to this aspect, the position where the retaining portion abuts against the base portion or the tip portion does not change, so that the movable range of the lid body is prevented from changing when the operator operates the lid body, making it easy for the operator to operate the lid body.

[0021] According to a preferred aspect of the present invention, the hinge metal fitting extends upward and outward beyond the inner lid when the inner lid is fitted into the opening.

[0022] According to this embodiment, the hinge fitting is disposed above the inner lid and does not interfere with the inner lid. Also, the length of the hinge fitting in the longitudinal direction can be made longer than in the case where the hinge fitting is disposed to extend in a substantially vertical direction. Therefore, the movable range of the lid body when it is turned or pivoted can be made wider. Effect of the Invention

[0023] According to the present invention, it is possible to provide a drainage equipment lid that is equipped with an inner lid and can be opened and closed more reliably without increasing the size. [Brief description of the drawings]

[0024] [Figure 1] FIG. 2 is a plan view of the drainage equipment cover according to the present embodiment. [Diagram 2] FIG. 2 is a bottom view of the drainage equipment cover according to the present embodiment. [Figure 3A] 1 is a cross-sectional view of the drainage equipment cover of this embodiment when closed. FIG. [Figure 3B] FIG. 3B is an enlarged view of the vicinity of the hinge metal fitting in FIG. 3A. [Figure 4A] FIG. 11 is a cross-sectional view of the drainage lid during a turning operation. [Figure 4B] FIG. 11 is a cross-sectional view of the drainage equipment cover during a turning operation. [Diagram 5] 1 is a cross-sectional view of the drainage equipment lid during a pull-out operation. FIG. [Figure 6] FIG. [Figure 7] FIG. 11 is a cross-sectional view of the drainage equipment cover during a pivoting operation. [Figure 8] 13 is a cross-sectional view of the drainage equipment cover when the cover body and the hinge fittings are removed during the removal operation. FIG. [Figure 9A] 11 is a cross-sectional view of the hinge assisting tool when it is moved upward. FIG. [Figure 9B] 13 is a cross-sectional view of the hinge assistant tool when it is moved along the third passage. FIG. [Figure 9C] 13 is a cross-sectional view of the hinge assisting tool when it is moved along the second passage. FIG. [Figure 9D] 13 is a cross-sectional view of the hinge assisting tool when it is moved along the first passage and removed from the lid frame. FIG. [Figure 10] FIG. 1 is a side view of a hinge structure according to a conventional embodiment. [Figure 11] 11 is a side view of the hinge structure when the connector in FIG. 10 is lengthened in the longitudinal direction. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, an embodiment of the drainage equipment cover according to the present invention will be described with reference to the drawings. However, the embodiment described below is merely one embodiment of the present invention, and is not intended to limit the present invention in any particular way. In addition, the same reference numerals are used for members and parts that perform the same function, and duplicated descriptions are omitted or simplified as appropriate.

[0026] FIG. 1 is a plan view showing a drainage facility cover 10 according to this embodiment. FIG. 2 is a bottom view of the drainage facility cover 10. FIG. 3A is a cross-sectional view of the drainage facility cover 10. As shown in FIG. 3A, the drainage facility cover 10 is provided on a pipeline 1 buried in the ground. The pipeline 1 is buried in the ground and extends vertically. The type of pipeline 1 is not particularly limited. Here, the pipeline 1 is, for example, a manhole or a part of a manhole. The pipeline 1 has an opening 1a. For example, a temporary toilet to be used in the event of a disaster is installed in the pipeline 1.

[0027] Although not shown in the figures, the pipeline 1 has a main pipeline. The main pipeline is connected to the lower end of the pipeline 1 and connects the pipeline 1 with the main sewer pipe. The main pipeline extends, for example, horizontally and is disposed along a direction intersecting the pipeline 1. The main pipeline may be composed of a plurality of pipes, inlets, joints, etc., or may be composed of a single pipe.

[0028] The drainage equipment lid 10 is provided at the upper end of the pipeline 1. The drainage equipment lid 10 includes a lid body 30, a lid frame 20, an inner lid 40, a hinge fitting 50, and a hinge auxiliary 60. The lid frame 20 is fixed to a ring-shaped base 70. Although not shown, for example, the pipeline 1 is placed in a manhole buried in the ground, and the gap between the manhole and the pipeline 1 is filled with a filler such as mortar. The base 70 is fixed to the top of the manhole filled with a filler such as mortar. The lid body 30 is detachably fitted into the lid frame 20. In the drainage equipment lid 10, the lid body 30 and the inner lid 40 are detachable. In the following description of this specification, the term "open state of the drainage equipment lid 10" refers to a state in which the lid body 30 is removed from the lid frame 20. On the other hand, the phrase "the drainage equipment cover 10 is in a closed state" refers to a state in which the cover body 30 is fitted into the cover frame 20.

[0029] As shown in Fig. 2, the lid body 30 includes a lid main body 31, a hinge metal fitting support portion 32, and a hook member 33 (see Fig. 3A). As shown in Figs. 4A and 4B, when the lid body 30 is lifted, the posture of the lid body 30 changes. Thus, when the positional relationship of the lid body 30 is specified in this specification, the state of the lid body 30 refers to the state when it is fitted into the lid frame 20 as shown in Fig. 3A, unless otherwise specified.

[0030] The lid body 31 is a disk-shaped member. The material from which the lid body 31 is formed is not particularly limited, but in this embodiment, it is made of cast iron. As shown in Fig. 3A, the lid body 31 has a tapered portion 31a on the outer periphery, and the tapered portion 31a is fitted into the upper inner periphery of the lid frame 20.

[0031] As shown in FIG. 2, the hinge metal support part 32 includes a first support piece 32a, a second support piece 32b, and a retaining bolt 32c (see FIG. 3A). The first support piece 32a and the second support piece 32b are aligned in a direction perpendicular to the radial direction of the cover body 30 (the vertical direction in FIG. 2). In this embodiment, the second support piece 32b extends longer than the first support piece 32a. A notch 32aa is formed in the first support piece 32a, and a notch 32ba is formed in the second support piece 32b. A first support part 52 (see FIG. 3B) of the hinge metal 50 described later is inserted so as to straddle the notch 32aa and the notch 32ba. As a result, the hinge metal 50 is supported by the cover body 30. A hole 32bb is formed in the notch 32ba. The hole 32bb is, for example, a screw hole. The hole 32bb is formed in a direction substantially perpendicular to the direction in which the second support piece 32b extends. The retaining bolt 32c shown in FIG. 3A is screwed into the hole 32bb. The type of the retaining bolt 32c is not particularly limited, but may be, for example, a hexagonal socket bolt. Although detailed illustration is omitted, the retaining bolt 32c is inserted into the hole 32bb and fixed by a nut, so that the retaining bolt 32c is fixed to the hole 32bb. After the hinge metal fitting 50 is inserted into the notches 32aa and 32ba, the retaining bolt 32c is fixed to the hole 32bb, so that the movement of the hinge metal fitting 50 toward the inside in the radial direction of the cover body 30 is restricted. Therefore, the cover body 30 is structured so that the hinge metal fitting 50 does not fall out of the notches 32aa and 32ba.

[0032] The hook member 33 is disposed on the underside of the lid 30, on the opposite side of the hinge support portion 32 with respect to the center of the lid 30. The hook member 33 is a member supported so as to be rotatable in the radial direction of the lid 30. The hook member 33 includes a base portion 33a, a tip locking portion 33b, a spring 33c, a push-in portion 33d, and a weight portion 33e. The base portion 33a has a generally U-shaped shape that is convex downward. The tip locking portion 33b is located at the tip of the base portion 33a on the radial outer side of the lid 30. The tip locking portion 33b is a portion that engages with the lid frame 20, and prevents the lid 30 from coming off the lid frame 20. The spring 33c is a member that is fixed to the underside of the lid 30 and applies a biasing force so that the base portion 33a, the tip locking portion 33b, the push-in portion 33d, and the weight portion 33e rotate toward the radial outer side of the lid 30. The pushing portion 33d is a portion that an operator pushes downward when rotating the hook member 33. The upper surface of the pushing portion 33d is substantially flush with the upper surface of the lid body 31. When an operator uses a tool (e.g., a crowbar) to push the pushing portion 33d with a force exceeding the biasing force of the spring 33c, the base portion 33a rotates radially inward of the lid body 30. At this time, the engagement between the tip locking portion 33b and the lid frame 20 is released. The weight portion 33e is a member that is located radially inward of the lid body 30 relative to the base portion 33a.

[0033] As shown in Fig. 5, the lid frame 20 includes a frame body 21, an opening 22, a latched portion 23, a fixed portion 24, and a guide portion 25. The lid frame 20 has a lid body 30 fitted into the upper end thereof. The shape of the lid frame 20 is circular in plan view. A part of the pipeline 1 and an inner lid 40 are disposed radially inside the lid frame 20. The material from which the lid frame 20 is formed is not particularly limited, but in this embodiment, it is made of cast iron.

[0034] The frame body 21 is a tubular member that extends in the vertical direction and has a shape that expands radially outward as it extends downward. The material of the frame body 21 is not particularly limited, but in this embodiment, it is made of cast iron.

[0035] The opening 22 is formed at the upper end of the lid frame 20. In this embodiment, the shape of the opening 22 is circular in a plan view. The opening 22 has a tapered portion 22a. The tapered portion 31a of the lid body 31 is fitted into the tapered portion 22a of the opening 22, thereby closing the drainage equipment lid 10.

[0036] The locked portion 23 is a member that extends downward from the frame main body 21 toward the radially inner side of the lid frame 20. As shown in Fig. 3A, when the spring 33c of the hook member 33 urges the base portion 33a radially outward of the lid body 30, the locked portion 23 engages with the tip locking portion 33b.

[0037] The fixing portion 24 is a member that extends from the frame main body 21 radially outward of the lid frame 20. The fixing portion 24 is embedded in the base 70. By embedding the fixing portion 24 in the base 70, the lid frame 20 is fixed.

[0038] Guide portion 25 is a portion that rotatably supports hinge auxiliary tool 60. In this embodiment, as shown in Fig. 3B, guide portion 25 includes first passage 25a, second passage 25b, third passage 25c, and stopper 25d. The cross section of guide portion 25 has a U-shaped passage formed by first passage 25a, second passage 25b, and third passage 25c.

[0039] The first passage 25a is a passage extending from the frame body 21 in the radial direction of the lid frame 20. An opening 25aa is formed in the first passage 25a. The second passage 25b is connected to the end of the first passage 25a on the radial outer side of the lid frame 20. In this embodiment, the second passage 25b extends in a substantially vertical direction. The third passage 25c is connected to the lower end of the second passage 25b. The third passage 25c extends from the lower end of the second passage 25b to the radial inner side of the lid frame 20. The end of the third passage 25c on the radial inner side of the lid frame 20 is the hinge auxiliary support portion 25ca. The hinge auxiliary support portion 25ca is a portion that supports the second support portion 61 of the hinge auxiliary 60 described later. A stopper 25d is arranged at the end of the third passage 25c on the radial outer side of the lid frame 20. Stopper 25d protrudes upward from the lower surface of third passage 25c. Stopper 25d is a member that prevents second support portion 61 of hinge auxiliary tool 60 from coming off guide portion 25.

[0040] 3A, the inner lid 40 is disposed below the lid body 30 and fitted into the opening 1a of the pipeline 1. The inner lid 40 is detachable from the opening 1a. When using the pipeline 1 (such as when inspecting the pipeline 1), the worker removes the inner lid 40, and when not using the pipeline 1, the worker attaches the inner lid 40 to the opening 1a and closes the pipeline 1.

[0041] As shown in FIG. 3B, the hinge 50 is rotatably supported by the cover 30 (see FIG. 3) and extends downward from the cover 30. In this embodiment, the hinge 50 extends upward and outward from the inner cover 40. The hinge 50 includes an upper end 51, a first support portion 52, a main body 53, and a retaining portion 54. The material for forming the hinge 50 is not particularly limited, but is made of cast iron in this embodiment. In this embodiment, the upper end 51, the first support portion 52, the main body 53, and the retaining portion 54 are formed from a single member. However, the upper end 51, the first support portion 52, the main body 53, and the retaining portion 54 may be separate bodies, or any two or more of the upper end 51, the first support portion 52, the main body 53, and the retaining portion 54 may be integrated.

[0042] The upper end 51 is located below the lid 30 and is a portion that abuts against the underside of the lid 30. The upper end 51 limits the direction in which the hinge 50 rotates. The upper end 51 abuts against the underside of the lid 30 when the main body 53 is in a state in which it extends radially outward from the lid frame 20. Therefore, the hinge 50 is prevented from rotating in a direction in which the main body 53 is in a position extending vertically.

[0043] The first support part 52 is disposed below the upper end part 51. The first support part 52 is a columnar part supported by the first support piece 32a (see FIG. 2) and the second support piece 32b (see FIG. 2). The first support part 52 extends in a direction that is substantially perpendicular to the direction in which the first support piece 32a and the second support piece 32b extend in a plan view. The first support part 52 is inserted into the notch 32aa (see FIG. 2) and the notch 32ba (see FIG. 2) toward the radial outside of the cover body 30, so that the hinge metal fitting 50 is supported by the cover body 30. The diameter of the longitudinal cross section of the first support part 52 is formed to be shorter than the vertical length of the notch 32aa and the notch 32ba. Therefore, the hinge metal fitting 50 can rotate around the first support part 52.

[0044] The main body portion 53 is a member that extends downward from the first support portion 52. The main body portion 53 engages with the hinge auxiliary tool 60. By engaging the main body portion 53 with the hinge auxiliary tool 60, the hinge fitting 50 and the hinge auxiliary tool 60 can move in conjunction with each other. In this embodiment, the main body portion 53 extends straight, but the shape of the main body portion 53 is not limited to this. The shape of the main body portion 53 may be curved.

[0045] The retaining portion 54 is located at the lower end of the hinge fitting 50. The retaining portion 54 extends in a direction that is substantially perpendicular to the direction in which the first support piece 32a and the second support piece 32b extend in a plan view. That is, the longitudinal direction of the retaining portion 54 and the longitudinal direction of the first support portion 52 are substantially parallel to each other. When the cover body 30 is lifted from the state shown in FIG. 3B and the hinge fitting 50 moves upward, the retaining portion 54 comes into contact with the hinge auxiliary tool 60, thereby preventing the hinge fitting 50 from coming off the hinge auxiliary tool 60.

[0046] As shown in FIG. 3B, the hinge auxiliary tool 60 is supported by the guide part 25 of the lid frame 20. The hinge auxiliary tool 60 includes a second support part 61, a root part 62, and a tip part 63. The second support part 61 is the support part in the present invention. As shown in FIG. 6, the hinge auxiliary tool 60 is formed with a hole 64. The hinge metal fitting 50 is inserted into the hole 64 in the vertical direction, so that the hinge auxiliary tool 60 and the hinge metal fitting 50 are connected to each other. In this embodiment, the second support part 61, the root part 62, and the tip part 63 are formed of a single member. However, the second support part 61, the root part 62, and the tip part 63 may be separate, or any two of the second support part 61, the root part 62, and the tip part 63 may be integrated. The material for forming the hinge auxiliary tool 60 is not particularly limited, but in this embodiment, it is made of cast iron.

[0047] The second support part 61 is supported by the hinge auxiliary support part 25ca of the guide part 25 and is rotatably supported by the lid frame 20. The second support part 61 extends in a direction substantially perpendicular to the direction in which the root part 62 and the tip part 63 extend. That is, as shown in FIG. 3B, the second support part 61 extends in a direction substantially perpendicular to the direction in which the third passage 25c of the guide part 25 extends in a plan view. The second support part 61 is formed in a cylindrical shape. The diameter of the longitudinal cross section of the second support part 61 is shorter than the vertical length of the first passage 25a, the second passage 25b, and the third passage 25c of the guide part 25. Therefore, the hinge auxiliary tool 60 supported by the guide part 25 can rotate in the vertical direction around the second support part 61. In addition, the second support part 61 can pass through the first passage 25a, the second passage 25b, and the third passage 25c of the guide part 25.

[0048] The root portion 62 is a portion that extends downward from the second support portion 61 and toward the radial inside of the lid frame 20. In this embodiment, as shown in FIG. 6, the longitudinal length L1 of the root portion 62 in plan view is shorter than the longitudinal length L2 of the tip portion 63 in plan view. As shown in FIG. 3B, in this embodiment, the root portion 62 extends straight from the second support portion 61. The root portion 62 includes a rotation suppressing portion 62a. The rotation suppressing portion 62a is a portion that is formed in a substantially L-shape in side view. The rotation suppressing portion 62a abuts against the radial inside of the frame body 21, thereby suppressing the downward rotation of the hinge auxiliary tool 60. In this embodiment, the rotation suppressing portion 62a is formed so that the tip portion 63 is in a substantially horizontal state with respect to the lid body 30 when the rotation suppressing portion 62a abuts against the radial inside of the frame body 21.

[0049] The tip portion 63 is a portion that extends upward from the lower end of the root portion 62. Here, "extending upward from the lower end of the root portion 62" refers to extending upward with respect to the longitudinal direction of the root portion 62, with the lower end of the root portion 62 as a base point. Therefore, as long as the direction in which the tip portion 63 extends is upward with respect to the longitudinal direction of the root portion 62, the tip portion 63 may extend in any direction, such as a direction away from the lid body 30, a direction substantially parallel to the lid body 30, or a direction toward the lid body 30. In this embodiment, as described above, the tip portion 63 extends in a direction substantially parallel to the lid body 30. In this embodiment, the tip portion 63 extends straight from the lower end of the root portion 62. As shown in FIG. 5, the support surface 63a, which is the upper surface of the tip portion 63, supports the lid body 30 so that it can slide. The operation of the lid body 30 using the support surface 63a will be described in detail later.

[0050] As shown in FIG. 6, the hole 64 is formed across the root portion 62 and the tip portion 63, and penetrates the root portion 62 and the tip portion 63 in the up-down direction. The hole 64 is an elongated hole extending in the longitudinal direction of the root portion 62 and the tip portion 63. The minor axis of the hole 64 is longer than the diameter of the main body portion 53 (see FIG. 3B) of the hinge fitting 50. The major axis of the hole 64 is longer than the longitudinal length of the retaining portion 54 of the hinge fitting 50. The position of the hole 64 on the radial inner side of the lid frame 20 is the abutment position 64a. As shown in FIG. 4A, the abutment position 64a is the position where the main body portion 53 of the hinge fitting 50 abuts when the lid body 30 is lifted.

[0051] The above has described the configuration of the drainage equipment cover 10 according to this embodiment. Next, various operations performed when opening and closing the cover body 30 of the drainage equipment cover 10 will be described.

[0052] First, the operation of pulling out the drainage equipment lid 10 will be described. The pulling out operation is an operation of releasing the engagement between the lid body 30 and the lid frame 20 when the drainage equipment lid 10 is closed. As shown in FIG. 3A, when the drainage equipment lid 10 is closed, the worker applies a downward force to the pushing portion 33d of the hook member 33 using, for example, a crowbar. At this time, when the pushing portion 33d is pushed in with a force exceeding the biasing force of the spring 33c, the base portion 33a rotates radially inward of the lid body 30. At this time, the engagement between the tip locking portion 33b and the locked portion 23 is released. In this state, the worker, for example, puts the tip of a crowbar against the underside of the lid body 30 near the hook member 33 and uses the lever to lift the lid body 30 upward. This releases the engagement between the tapered portion 31a of the lid main body 31 and the tapered portion 22a of the opening 22 (see FIG. 5). At this time, the hinge metal support part 32 of the lid body 30 moves radially inward of the lid frame 20, and the hinge metal 50 also moves radially inward of the lid frame 20. That is, the main body part 53 (see FIG. 3B) of the hinge metal 50 moves toward the abutment position 64a (see FIG. 6) of the hole 64. After completing the pull-out operation, the lid body 30 may be placed so that the lower surface of the hinge metal support part 32 of the lid body 30 is supported on the upper surface of the support surface 63a of the hinge auxiliary tool 60 and the weight part 33e of the hook member 33 is supported on the upper surface of the lid frame 20, as shown in FIG. 5. This allows the worker to temporarily stop the operation after completing the pull-out operation before starting another operation. The lid body 30 may also be placed so that the base part 33a of the hook member 33 is supported on the upper surface of the lid frame 20.

[0053] Next, the turning operation will be described. The turning operation is an operation of opening the drainage equipment lid 10 by reversing the front and back of the lid body 30 as shown in FIG. 4B. As shown in FIG. 5, when the lid body 30 is further moved upward after the pulling-out operation is completed, the hinge metal fitting 50 rotates radially inward of the lid frame 20, and the main body part 53 abuts against the abutment position 64a (see FIG. 6) of the hole 64. Furthermore, as the hinge metal fitting 50 moves upward, the slip-out prevention part 54 abuts against the lower surface of the tip part 63. When the lid body 30 is further moved upward, the hinge auxiliary tool 60 rotates upward around the second support part 61 as shown in FIG. 4A. At this time, the hinge auxiliary tool 60 is in a state in which it can rotate in the radial direction of the lid frame 20 around the abutment position 64a of the hole 64. Therefore, the hinge auxiliary tool 60 may rotate so that the second support part 61 moves in the third passage 25c (see FIG. 3B) toward the radial outside of the lid frame 20. However, since the stopper 25d (see FIG. 3B) is protruding from the third passage 25c, even if the hinge auxiliary tool 60 rotates so that the second support part 61 moves in the third passage 25c, the stopper 25d stops the rotation of the hinge auxiliary tool 60. Therefore, during the turning operation, the hinge auxiliary tool 60 is prevented from rotating until the second support part 61 moves to the lower end position of the second passage 25b. When the lid body 30 is further rotated in the clockwise direction in FIG. 4A around the abutment position 64a from the state of FIG. 4A, the state of FIG. 4B is reached. As a result, the drainage equipment lid 10 is in the open state.

[0054] Next, the pivoting operation will be described. The pivoting operation is an operation of opening the drainage equipment lid 10 without turning the lid body 30 over, as shown in FIG. 7. After the pull-out operation shown in FIG. 5 is completed, the lid body 30 is moved upward and in the circumferential direction of the lid frame 20. At this time, the main body 53 of the hinge fitting 50 can freely rotate with respect to the hole 64 (see FIG. 6) with the longitudinal direction of the hinge fitting 50 as an axis, so that the lid body 30 rotates in the radial direction. FIG. 7 is a diagram of the lid body 30 rotated about half a turn in the circumferential direction of the lid frame 20 from the state shown in FIG. 5. This brings the lid body 30 of the drainage equipment lid 10 into an open state.

[0055] Next, the removal operation will be described. The removal operation is an operation for removing the lid body 30, the hinge metal fitting 50, and the hinge auxiliary tool 60 from the lid frame 20. As shown in FIG. 5, after the pull-out operation is completed, the lid body 30 is moved upward until the radial direction of the lid body 30 is approximately perpendicular to the tip portion 63, and then, as shown in FIG. 8, the lid body 30 is rotated in the circumferential direction of the lid frame 20 so that the longitudinal direction of the retaining portion 54 of the hinge metal fitting 50 approximately coincides with the longitudinal direction of the hole 64. By moving the lid body 30 upward from the state shown in FIG. 8, the connection between the lid body 30 and the hinge metal fitting 50 and the hinge auxiliary tool 60 is released. Then, the hinge auxiliary tool 60 is removed from the lid frame 20. To remove the hinge auxiliary tool 60 from the lid frame 20, first, as shown in FIG. 9A, the hinge auxiliary tool 60 is moved upward so that the longitudinal axis of the second support portion 61 is positioned above the stopper 25d. Next, as shown in FIG. 9B, the hinge auxiliary tool 60 is moved toward the radially outer side of the lid frame 20 until the second support part 61 passes through the third passage 25c and is disposed at the lower end of the second passage 25b. Next, as shown in FIG. 9C, the hinge auxiliary tool 60 is moved upward until the second support part 61 passes through the second passage 25b and is disposed at the radially outer end of the lid frame 20 in the first passage 25a. Next, as shown in FIG. 9D, the hinge auxiliary tool 60 is moved toward the radially inner side of the lid frame 20 so that the second support part 61 is removed from the opening 25aa toward the radially inner side of the lid frame 20. This causes the hinge auxiliary tool 60 to be removed from the lid frame 20. When attaching the hinge auxiliary tool 60, the hinge fitting 50, and the lid body 30 to the lid frame 20, the procedure of the removal operation may be performed in reverse.

[0056] Next, the sliding action will be described. The sliding action is the action taken when closing the drainage equipment lid 10. After use of the drainage equipment lid 10 is completed, the hinge metal fitting support portion 32 of the lid body 30 is supported by the support surface 63a of the hinge auxiliary tool 60 as shown in FIG. 5. From this state, the worker can slide the lid body 30 and fit it into the lid frame 20 by pushing the lid body 30 toward the inside in the radial direction of the lid body 30.

[0057] As described above, according to the drainage equipment lid 10 of this embodiment, the hinge auxiliary tool 60 includes the second support part 61, the base part 62, and the tip part 63. The hinge auxiliary tool 60 is rotatably supported by the lid frame 20 at the second support part 61. Since the hinge fitting 50 is rotatably supported by the lid body 30, when the lid body 30 is lifted by an operator, the hinge fitting 50 is pulled by the lid body 30 and moves upward. The hinge auxiliary tool 60, which engages with the hinge fitting 50 at the abutment position 64a of the hole 64, is pulled by the hinge fitting 50 and rotates upward. Therefore, the operator can open the drainage equipment lid 10 with the lid body 30, the hinge fitting 50, the hinge auxiliary tool 60, and the lid frame 20 connected to each other. At this time, since the tip portion 63 of the hinge auxiliary tool 60 is bent upward from the lower end of the root portion 62, the position of the lower end of the hinge auxiliary tool 60 is disposed higher than when the tip portion 63 extends straight from the lower end of the root portion 62. Therefore, even if the root portion 62 and the tip portion 63 of the hinge auxiliary tool 60 are formed relatively long, the hinge auxiliary tool 60 and the inner lid 40 do not interfere with each other. Since the hinge auxiliary tool 60 and the inner lid 40 do not interfere with each other, the worker can reliably open and close the drainage equipment lid 10. In addition, at this time, there is no need to increase the size of the drainage equipment lid 10.

[0058] According to the drainage equipment lid 10 of this embodiment, the lid frame 20 is provided with a guide portion 25. By passing the second support portion 61 through the first passage 25a, the second passage 25b, and the third passage 25c of the guide portion 25, the hinge auxiliary tool 60 can be supported by the lid frame 20 or the support can be removed. That is, the hinge auxiliary tool 60 is removable from the lid frame 20. When a worker removes the inner lid 40 to install an emergency toilet or the like on the pipeline 1, if the hinge auxiliary tool 60 is attached to the lid frame 20, the work may be hindered. As in this embodiment, the hinge auxiliary tool 60 is removable, so that the work caused by the hinge auxiliary tool 60 when removing the inner lid 40 is prevented from being hindered.

[0059] According to the drainage equipment lid 10 of this embodiment, the end of the third passage 25c on the radial inner side of the lid frame 20 is the hinge auxiliary support part 25ca, and the second support part 61 is supported by the hinge auxiliary support part 25ca. In addition, at the end of the third passage 25c on the radial outer side of the lid frame 20, a stopper 25d is provided protruding upward from the lower surface of the third passage 25c. Therefore, even if the hinge auxiliary 60 moves so that the second support part 61 moves toward the radial outer side of the lid frame 20 through the third passage 25c when the lid body 30 is moved upward, the movement is stopped by the stopper 25d. If the stopper 25d is not abutted against the guide part 25, there is a possibility that the second support part 61 will pass through the third passage 25c and move to the lower end position of the second passage 25b when the lid body 30 is moved upward. If the lid body 30 is further moved upward from that state, the second support part 61 passes through the second passage 25b, and the second support part 61 reaches the first passage 25a. Therefore, the worker may perform a turning motion or a pivoting motion, and may be placed in the first passage 25a or the second passage 25b. In that state, even if the drainage equipment lid 10 is closed, the hinge auxiliary tool 60 is not placed in the position shown in FIG. 3A. Therefore, the movement of the lid body 30 is restricted by the hinge fitting 50 and the hinge auxiliary tool 60, and the lid body 30 may not be able to fit into the opening 22. As in this embodiment, the guide part 25 has a stopper 25d, so that the second support part 61 is prevented from coming off the third passage 25c. This prevents the operation of closing the drainage equipment lid 10 from being hindered.

[0060] According to the drainage equipment lid 10 of this embodiment, the tip portion 63 has a support surface 63a that slidably supports the lid body 30. From the state shown in Fig. 5, an operator can close the lid body 30 while sliding it by pushing the lid body 30 toward the radial inside of the lid frame 20. Therefore, the burden on the operator when closing the drainage equipment lid 10 can be reduced compared to when the operator fits the lid body 30 into the lid frame 20 while lifting it up.

[0061] In the drainage equipment lid 10 of this embodiment, the hinge fitting 50 is arranged so that it extends radially outward from the lid frame 20 when the upper end portion 51 is in contact with the lid body 30. Compared to the case where the hinge fitting 50 is arranged so that it extends substantially vertically from the lid body 30, the position of the lower end of the hinge fitting 50 is located higher. Therefore, interference between the hinge fitting 50 and the inner lid 40 is less likely to occur.

[0062] According to the drainage equipment cover 10 of this embodiment, the length L1 of the base portion 62 in the longitudinal direction in a plan view is shorter than the length L2 of the tip portion 63 in the longitudinal direction in a plan view. Since the base portion 62 extends downward from the tip portion 63, the longer the base portion 62 is, the closer the distance between the inner cover 40 and the hinge auxiliary device 60 becomes, and there is a risk of interference between the inner cover 40 and the hinge auxiliary device 60. However, as in this embodiment, by making L1>L2, the distance between the inner cover 40 and the hinge auxiliary device 60 can be made relatively wide even if the base portion 62 and the tip portion 63 are relatively long. In other words, there is no need to increase the size of the drainage equipment cover 10.

[0063] According to the drainage equipment cover 10 of this embodiment, the root portion 62 and the tip portion 63 each extend straight in the longitudinal direction. Here, for example, if the tip portion 63 is curved in the vertical direction and has an uneven shape, when the worker lifts the cover body 30, the retaining portion 54 of the hinge metal fitting 50 gets caught on the unevenness. At this time, the position where the retaining portion 54 gets caught may change with each operation. If the position where the retaining portion 54 gets caught changes, the movable range of the cover body 30 when the cover body 30 is lifted changes. As in this embodiment, since the root portion 62 and the tip portion 63 extend straight, the position where the retaining portion 54 gets caught does not change with each operation, and the movable range of the cover body 30 does not change. Therefore, the worker can easily perform turning and pivoting operations.

[0064] According to the drainage equipment cover 10 of this embodiment, the hinge fitting 50 extends upward and outward from the inner cover 40 when the inner cover 40 is fitted into the opening 1a. Since the hinge fitting 50 is disposed above the inner cover 40, it does not interfere with the inner cover 40. In addition, since the hinge fitting 50 extends outward from the inner cover 40, the length of the hinge fitting 50 in the longitudinal direction can be made longer than when the hinge fitting 50 is disposed to extend in a substantially vertical direction, for example. Since the length of the hinge fitting 50 in the longitudinal direction is relatively long, the distance between the cover frame 20 and the cover body 30 can be made relatively long when the cover body 30 is lifted. In other words, the movable range of the cover body 30 when the cover body 30 is turned or rotated can be made wider. [Explanation of symbols]

[0065] 1 conduit 10 Drainage equipment lid 20 Lid frame 30 Lid 40 Inner lid 50 Hinge fittings 60 Hinge Auxiliary Tool 61 Second support part (support part) 62 Base part 63 Tip part

Claims

1. A cover frame provided on a pipe having an opening open upward; A lid body that is removably attached to the lid frame; an inner lid disposed below the lid body and fitted into the opening of the pipeline; a hinge metal fitting rotatably supported on the lid body and extending downward from the lid body; a hinge assisting tool supported by the lid frame and engaging with the hinge metal fitting; The hinge assisting tool is A support portion rotatably supported by the lid frame; A root portion extending downward from the support portion toward the radially inner side of the lid frame; A tip portion bent upward from the lower end of the base portion.

2. The lid frame includes a guide portion with which the support portion is engaged, The guide unit is a first passage opening to a radially inner side of the lid frame and extending in a radial direction of the lid frame; a second passage connected to the first passage and extending downward from the first passage; The drainage equipment lid according to claim 1 , further comprising: a third passage connected to a lower end of the second passage and extending radially of the lid frame.

3. The third passage includes a hinge auxiliary device support portion that supports the hinge auxiliary device, The drainage equipment lid according to claim 2 , wherein the guide portion is provided with a stopper protruding from the underside of the third passage radially outward of the lid frame relative to the hinge auxiliary device support portion.

4. The drainage facility lid according to claim 1 , wherein the tip portion has a support surface that slidably supports the lid body.

5. The hinge has an upper end portion that abuts against the lid, The drainage equipment lid according to claim 1 , wherein the hinge fitting is arranged so as to extend radially outward from the lid frame when the upper end portion is in contact with the lid body.

6. The drainage equipment lid according to claim 1 , wherein the longitudinal length of the base portion in a plan view is shorter than the longitudinal length of the tip portion in a plan view.

7. The root portion and the tip portion extend straight in their respective longitudinal directions, The drainage equipment lid according to claim 1 , wherein the hinge fitting has a retaining portion that abuts against an underside of the base portion or the tip portion.

8. The drainage equipment lid according to claim 1 , wherein the hinge fitting extends above and outwardly from the inner lid when the inner lid is fitted into the opening.

Images