WO2014175070A1 - Cover for underground structure - Google Patents
Cover for underground structure Download PDFInfo
- Publication number
- WO2014175070A1 WO2014175070A1 PCT/JP2014/060299 JP2014060299W WO2014175070A1 WO 2014175070 A1 WO2014175070 A1 WO 2014175070A1 JP 2014060299 W JP2014060299 W JP 2014060299W WO 2014175070 A1 WO2014175070 A1 WO 2014175070A1
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- WO
- WIPO (PCT)
- Prior art keywords
- lid
- receiving frame
- surface portion
- receiving
- main body
- Prior art date
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
Definitions
- the present invention relates to a lid for an underground structure including a lid main body and a receiving frame that supports the lid main body so that the lid main body can be opened and closed.
- underground structure lid refers to a manhole cover, large iron cover, sewage culm lid that can be opened and closed so that an opening through the ground can be opened and closed.
- the outer diameter of the lid body is slightly smaller than the inner diameter of the receiving frame, and the outer peripheral portion of the lid main body and the inner peripheral portion of the receiving frame are substantially vertical surfaces and protrude from the inner periphery of the receiving frame.
- cover main body with the made shelf part is known.
- the outer diameter of the lid body and the inner diameter of the receiving frame are made the same diameter, and the outer peripheral portion of the lid body and the inner peripheral portion of the receiving frame are formed with a steep slope downwardly, and the lid body is used as the receiving frame.
- the thing of the gradient receiving structure made to bite in is known.
- Patent Document 1 discloses that the inclination angle of the outer peripheral portion of the lid main body and the inclined surface of the inner peripheral portion of the receiving frame with respect to the vertical is 5 ° to 10 °.
- the height of the gradient surface of the outer peripheral part of a cover main body is made smaller than the height of the gradient surface of the inner peripheral part of a receiving frame.
- the angle of an inclined surface as mentioned above, the sufficient biting force with respect to the receiving frame of a lid body can be ensured, and the shakiness, vibration, and noise of a lid body are remarkable.
- the problem to be solved by the present invention is that the lid body can be prevented from rattling, vibration, and noise, and an excessive bite force to the receiving frame of the lid body can be prevented to generate an appropriate amount of labor. It is an object of the present invention to provide a lid for an underground structure that can be opened with a lid and can prevent the lid body from sliding up with respect to the receiving frame.
- a lid for an underground structure is a lid for an underground structure that includes a lid body and a receiving frame that supports the lid body so as to be openable and closable at an inner periphery thereof.
- the inner peripheral portion has a flat receiving-shaped receiving frame support portion and a receiving frame first surface portion formed by reducing the diameter toward the lower portion of the receiving frame with a gradient below the receiving frame support portion, and the outer peripheral portion of the lid body is The lid flat receiving portion supported by the receiving frame supporting portion, and below the lid flat receiving portion, vertically toward the lower portion of the lid main body, or toward the lower portion of the lid main body with a steep gradient than the first surface portion of the receiving frame.
- the lid has a first surface portion formed with a reduced diameter, and in the closed state of the lid body, the lid flat receiving portion is supported by the receiving frame supporting portion, and the lid first surface portion and the receiving frame first surface portion are The outer periphery of the lid body and the inner periphery of the receiving frame are pressed against each other by the pressing force generated by elastic deformation of at least one of them. Is the fact characterized.
- the lid for an underground structure of the present invention is a lid for an underground structure including a lid body and a receiving frame that supports the lid body so as to be openable and closable at an inner peripheral portion, and the inner peripheral portion of the receiving frame is a flat surface.
- a receiving frame second surface portion formed by reducing the diameter toward the lower side of the receiving frame, and the outer peripheral portion of the lid body includes a lid flat receiving portion supported by the receiving frame supporting portion, and a lower portion of the lid flat receiving portion.
- the lid first surface portion formed by reducing the diameter vertically toward the lower side of the lid body or with a steep slope than the first surface portion of the receiving frame, and the lid under the lid first surface portion.
- a lid second surface portion formed by reducing the diameter toward the lower side of the lid body with a gradient different from that of the first surface portion;
- the lid flat receiving portion is supported by the receiving frame supporting portion in the closed state of the lid main body, and at least one of the lid first surface portion and the lid second surface portion, the receiving frame first surface portion, and the receiving frame second surface portion. These are pressed against each other by a pressing force generated by elastic deformation of at least one of the outer peripheral portion of the lid main body and the inner peripheral portion of the receiving frame.
- the lid for an underground structure of the present invention is a lid for an underground structure including a lid body and a receiving frame that supports the lid body so as to be openable and closable at an inner peripheral portion, and the inner peripheral portion of the receiving frame is a flat surface.
- the outer peripheral portion of the lid main body is a lid flat receiving portion supported by the receiving frame support portion, and a lid first surface portion formed below the lid flat receiving portion.
- a lid third surface portion that is formed to expand vertically toward the lower side of the lid main body or with a gradient toward the lower side of the lid main body below the lid first surface portion.
- the lid flat receiving portion is supported by the receiving frame supporting portion, and the lid third surface portion and the receiving frame third surface portion are formed on the lid main body. Characterized in that it is pressed together by the pressing force of at least one of the elastic deformation of the inner peripheral portion of the peripheral portion and the receiving frame.
- the outer peripheral portion of the lid body has a lid fourth surface portion formed by reducing the diameter toward the lower side of the lid body with a gradient of the same angle as the receiving frame first surface portion below the lid third surface portion.
- the outer peripheral surface or the lower surface of the outer peripheral portion of the lid main body and the inner peripheral surface of the inner peripheral portion of the receiving frame abut,
- the outer peripheral part and / or the inner peripheral part of the receiving frame are plastically deformed in a state in which a pressing force due to elastic deformation remains.
- a plurality of notches and / or a plurality of through holes are provided in the circumferential direction on the outer peripheral portion of the lid body and / or the inner peripheral portion of the receiving frame.
- the plurality of cutout portions and / or the plurality of through-hole portions are provided on the outer peripheral portion of the lid main body located below the lid first surface portion and / or the inner peripheral portion of the receiving frame located below the first frame surface portion of the receiving frame. ing.
- the outer peripheral portion of the lid main body located below the lid first surface portion and / or the inner peripheral portion of the receiving frame located below the first frame surface portion are spaced apart in the circumferential direction. It is characterized in that it is formed by a plurality of projecting portions that are opened and protruded.
- a recess is provided at the base end of the protrusion so as to surround the protrusion.
- a reinforcing rib is provided on the back surface of the lid body, and an end portion of the reinforcing rib is separated from the inner peripheral wall of the outer peripheral portion of the lid body.
- the weight of the lid body and the load applied when the vehicle or the like travels on the lid body are supported by the flat receiving frame support portion. It is possible to prevent an excessive biting force from being generated in the receiving frame.
- the lid first surface portion and the receiving frame first surface portion, or at least one of the lid first surface portion and the lid second surface portion, and at least one of the receiving frame first surface portion and the receiving frame second surface portion are included.
- the lid third surface portion and the receiving frame third surface portion are pressed against each other by a pressing force caused by elastic deformation of at least one of the outer peripheral portion of the lid main body and the inner peripheral portion of the receiving frame, and thereby the radial movement of the lid main body Is suppressed. Furthermore, when the lid body tries to move in the up and down direction, due to the pressing force, between the lid first surface portion and the receiving frame first surface portion, or at least one of the lid first surface portion and the lid second surface portion, A frictional force is generated between at least one of the receiving frame first surface portion and the receiving frame second surface portion, or between the lid third surface portion and the receiving frame third surface portion, and the movement of the lid main body in the vertical direction is also suppressed.
- the lid for an underground structure includes a lid body 10 and a receiving frame 30 that supports the lid body 10 so that the lid body 10 can be opened and closed at an inner peripheral portion.
- the lid for the underground structure is formed of spheroidal graphite cast iron, and is attached to, for example, the upper end portion of the upper side lump of the manhole via a foundation adjustment portion, and the upper surface 14 of the lid body 10 is flush with the ground surface. Installed. ⁇ Example 1>
- FIG. 2 is a longitudinal cross-sectional view of the main part of the underground structure lid according to Embodiment 1 of the present invention.
- the inner peripheral surface 34 formed on the inner peripheral portion 31 of the receiving frame 30 includes a flat receiving-shaped receiving frame support portion 40 continuous with the upper surface 36 of the receiving frame 30, and a receiving frame first surface portion 42 below the receiving frame support portion 40. ing.
- the receiving frame support portion 40 forms a vertical surface 37 continuous from the upper surface 36 of the receiving frame 30 toward the lower side of the receiving frame 30, and an annular flat surface that is flat in the radial direction of the receiving frame 30, that is, in the horizontal direction, below the vertical surface 37. 38 is formed.
- the receiving frame first surface portion 42 is formed to be reduced in diameter toward the lower side of the receiving frame 30 with a gradient below the receiving frame support portion 40.
- the gradient of the receiving frame first surface portion 42 is a range in which the angle with respect to the vertical ( ⁇ in FIG. 2) is 1 ° to 10 °, and in this embodiment, the gradient ⁇ is formed at 2 °. ing.
- the “gradient” used in the following description is defined as an angle with respect to the vertical.
- the outer peripheral surface 12 formed on the outer peripheral portion 11 of the lid main body 10 includes a lid flat receiving portion 16 continuous with the upper surface 14 of the lid main body 10 and a lid first surface portion 18 below the lid flat receiving portion 16. ing.
- the lid flat receiving part 16 forms a continuous vertical surface 15 from the upper surface 14 of the lid body 10 toward the lower side of the lid body 10, and an annular flat surface that is flat in the radial direction of the lid body 10, that is, in the horizontal direction, below the lid surface 10.
- a surface 19 is formed.
- the lid first surface portion 18 is formed with a diameter decreasing toward the lower side of the lid main body 10 with a steeper slope than the receiving frame first surface portion 42 below the lid flat receiving portion 16.
- the lid first surface portion 18 has a slope ⁇ in the range of 0 ° to 9 °.
- the lid first surface portion 18 has a gradient ⁇ of 1 °.
- the lid main body 10 When the lid main body 10 is placed in the receiving frame 30 from the state of FIG. 2, the lower side of the lid first surface portion 18 and the lower side of the receiving frame first surface portion 42 start to contact each other. Further, when the lid main body 10 is placed in the receiving frame 30 and the closed state shown in FIG. 3 is reached, at least one of the outer peripheral portion 11 of the lid main body 10 and the inner peripheral portion 31 of the receiving frame 30 is elastically deformed or pressed by elastic deformation. The plastic body is plastically deformed with the pressure remaining, and the lid body 10 is placed in the normal lid position of the receiving frame 30. Note that “elastic deformation” used in the following description is defined as a concept including plastic deformation in a state where a pressing force due to elastic deformation remains.
- the outer peripheral portion 11 of the lid body 10 is greatly deformed so as to be reduced in diameter in the radial direction indicated by the solid line from the state indicated by the broken line.
- the inner peripheral portion 31 of the receiving frame 30 is also elastically deformed.
- the inner peripheral portion 31 is slightly smaller than the elastic deformation of the outer peripheral portion 11 of the lid body 10, so FIG.
- the elastic deformation of the inner peripheral portion 31 of the receiving frame 30 is omitted. The same applies to any of the following embodiments.
- the lid flat receiving portion 16 is supported by the receiving frame supporting portion 40, so that the weight of the lid main body 10 and the load applied by the vehicle traveling on the lid main body 10 are supported by the receiving frame. Supported by part 40. Furthermore, the lower part of the lid first surface part 18 and the lower part of the receiving frame first surface part 42 come into contact with each other, and the lid first surface part 18, the receiving frame first surface part 42, and the like are pressed by the elastic deformation of the outer peripheral part 11 of the lid body 10. Are pressed against each other.
- the pressing force in this case is a restoring force generated when the outer peripheral portion 11 of the lid body 10 is elastically deformed by a deflection amount ⁇ from the natural state of FIG. 2, and from the lid first surface portion 18 to the receiving frame first surface portion 42.
- the action part P acts in the diameter increasing direction of the lid body 10.
- a pressing force due to elastic deformation of the outer peripheral portion 11 of the lid main body 10 acts, so that when the lid main body 10 tries to move in the vertical direction, the lid first surface portion 18 and the receiving frame first A frictional force is generated between the first surface portion 42 and the movement of the lid body 10 in the vertical direction is suppressed. Therefore, it is possible to prevent the excessive biting force of the lid main body 10 from being received into the receiving frame 30 by the flat receiving-shaped receiving frame support portion 40 and the lid flat receiving portion 16. Furthermore, rattling, vibration, noise, and sliding of the lid main body 10 can be suppressed by the pressing force and frictional force generated between the outer peripheral portion 11 of the lid main body 10 and the inner peripheral portion 31 of the receiving frame 30. .
- the inherent elastic coefficient of the outer peripheral portion 11 of the lid main body 10 and the sectional modulus of the outer peripheral portion 11 of the lid main body 10, and the intrinsic elastic coefficient of the inner peripheral portion 31 of the receiving frame 30 and the inner periphery of the receiving frame 30 are described.
- the section modulus of the portion 31 the outer peripheral portion 11 of the lid body 10 is greatly elastically deformed.
- the present invention is not limited to this, and setting the inner peripheral portion 31 of the receiving frame 30 to be elastically deformed greatly also causes both the outer peripheral portion 11 of the lid body 10 and the inner peripheral portion 31 of the receiving frame 30 to be elastically deformed appropriately. Can also be set.
- an annular gap G1 is formed between the lid first surface portion 18 and the receiving frame first surface portion 42, and the lower portion of the lid first surface portion 18 and the receiving frame first surface portion 42 are formed.
- the bottom is in contact with the bottom.
- the present invention is not limited to this, and the elastic modulus of the outer peripheral portion 11 of the lid main body 10 and the inner peripheral portion 31 of the receiving frame 30, the diameter size and the angle of the outer peripheral surface 12 of the lid main body 10 and the inner peripheral surface 34 of the receiving frame 30 are set.
- the contact state between the lid first surface portion 18 and the receiving frame first surface portion 42 can be controlled.
- the lid first surface portion 18 and the receiving frame first surface portion 42 are in contact with each other, and the annular gap G1 is not formed. There may be cases.
- lattice-shaped reinforcing ribs 22 are disposed on the back surface 20 of the lid body 10 of this embodiment.
- the end 24 of the reinforcing rib 22 is separated from the inner peripheral wall 13 of the outer peripheral portion 11 of the lid main body 10 so that the elastic deformation of the outer peripheral portion 11 of the lid main body 10 is not hindered when the lid main body 10 is placed in the receiving frame 30. It is preferable.
- a plurality of notches 48 are arranged in the outer peripheral portion 11 of the lid main body 10 of the present embodiment in a slit shape in the circumferential direction, for example, on the lid first surface portion 18 at substantially equal intervals. .
- the rigidity of the outer peripheral portion 11 of the lid main body 10 is lowered, so that the outer peripheral portion 11 of the lid main body 10 is further elastically deformed. It can be promoted and is suitable.
- the plurality of cutout portions 48 are formed in the outer peripheral portion 11 of the lid body 10 in a slit shape, but the present invention is not limited thereto, and the plurality of cutout portions 48 are formed in the inner peripheral portion 31 of the receiving frame 30.
- the receiving frame first surface portion 42 may be formed by notching a slit at substantially equal intervals in the circumferential direction. In this case, the elastic deformation of the inner peripheral portion 31 of the receiving frame 30 can be further promoted.
- the shape of the notch is not limited to the slit shape, and may be a substantially T-shaped notch 48 as shown in FIG.
- the through-hole portion 49 may be used instead of the notched portion 48.
- FIG. A part thereof is a through-hole portion 49 having a window frame shape.
- the receiving frame first surface portion 42 is continuously formed below the flat surface 38 of the receiving frame support portion 40, and the lid first surface portion 18 is continuously formed below the flat surface 19 of the lid flat receiving portion 16.
- an R curved surface portion 41 is formed between the receiving frame support portion 40 and the receiving frame first surface portion 42, or the lid flat receiving portion 16 and the lid first surface portion 18 are
- the lid flat receiving portion 16 and the lid first surface portion 18 or the receiving frame support portion 40 and the receiving frame first surface portion 42 may be continuously formed with a smooth curved surface, such as forming an R curved surface portion 17 therebetween.
- an inclined surface such as a chamfer may be formed instead of the R curved surface portions 41 and 17.
- FIG. 8 is a longitudinal cross-sectional view of the main part of the underground structure lid according to Embodiment 2 of the present invention.
- the inner peripheral surface 34 formed on the inner peripheral portion 31 of the receiving frame 30 of the present embodiment includes a flat receiving-shaped receiving frame support portion 40 continuous with the upper surface 36 of the receiving frame 30, and a receiving frame first surface portion 42 below the receiving frame support portion 40. And a receiving frame second surface portion 66 below the receiving frame first surface portion 42.
- the receiving frame first surface portion 42 is formed with a diameter decreasing toward the lower side of the receiving frame 30 with a gradient below the receiving frame supporting portion 40.
- the receiving frame second surface portion 66 is formed with a diameter reduced toward the lower side of the receiving frame 30 with a different gradient from the receiving frame first surface portion 42 below the receiving frame first surface portion 42.
- the receiving frame first surface portion 42 forms a gradient ⁇ in the range of 1 ° to 10 °
- the receiving frame second surface portion 66 has the same orientation as the receiving frame first surface portion 42 but a different gradient ⁇ 1 from 0 °. Largely formed.
- the receiving frame first surface portion 42 is formed with a gradient ⁇ of 8 °
- the receiving frame second surface portion 66 is formed with a gradient ⁇ 1 of 6 ° that is steeper than the receiving frame second surface portion 42.
- the outer peripheral surface 12 formed on the outer peripheral portion 11 of the lid main body 10 includes a lid flat receiving portion 16 continuous with the upper surface 14 of the lid main body 10, a lid first surface portion 18 below the lid flat receiving portion 16, and a lid. It is composed of a lid second surface portion 68 below the first surface portion 18.
- the lid first surface portion 18 is formed with a diameter decreasing toward the lower side of the lid main body 10 with a steeper slope than the receiving frame first surface portion 42 below the lid flat receiving portion 16.
- the lid second surface portion 68 is formed below the lid first surface portion 18 by reducing the diameter toward the bottom of the lid body 10 with the same orientation as the lid first surface portion 18 but with a different gradient.
- the lid first surface portion 18 forms a gradient ⁇ in the range of 0 ° to 9 °
- the lid second surface portion 68 forms the gradient ⁇ 1 larger than 0 °.
- the lid first surface portion 18 is formed with a gradient ⁇ of 3 °
- the lid second surface portion 68 is formed with a gradient ⁇ 1 of 6 ° that is a gentler gradient than the lid first surface portion 18.
- the lid second surface portion 68 and the receiving frame first surface portion 42 first start contact, and then the lid second surface portion 68 and the receiving frame second surface portion 66. Begins to abut. Further, when the lid main body 10 is placed in the receiving frame 30 and the closed state shown in FIG. 9 is reached, at least one of the outer peripheral portion 11 of the lid main body 10 and the inner peripheral portion 31 of the receiving frame 30 is elastically deformed, and the lid main body 10 is received by the receiving frame. Fits in 30 regular lid positions.
- the lid flat receiving portion 16 is supported by the receiving frame supporting portion 40, so that the weight of the lid main body 10 and the load applied by the vehicle traveling on the lid main body 10 are supported by the receiving frame. Supported by part 40. Furthermore, a substantially intermediate position in the vertical direction of the lid second surface portion 68 and the upper portion of the receiving frame second surface portion 66 come into contact with each other, and due to the pressing force due to the elastic deformation of the outer peripheral portion 11 of the lid body 10, the lid second surface portion 68 and the receiving frame. The second surface portion 66 is pressed against each other.
- the pressing force in this case is a restoring force generated when the outer peripheral portion 11 of the lid main body 10 is elastically deformed by the deflection amount ⁇ from the natural state of FIG. 8, and from the lid second surface portion 68 to the receiving frame second surface portion 66.
- the action part P acts in the diameter increasing direction of the lid body 10.
- the radial movement of the lid main body 10 is suppressed by the pressing force due to the elastic deformation of the outer peripheral portion 11 of the lid main body 10, and between the lid second surface portion 68 and the receiving frame second surface portion 66 in the closed state.
- a frictional force is generated, and the movement of the lid body 10 in the vertical direction is suppressed. Therefore, it is possible to prevent an excessive biting force from being generated on the receiving frame 30 of the lid body 10.
- rattling, vibration, noise, and sliding of the lid main body 10 can be suppressed by the pressing force and frictional force generated between the outer peripheral portion 11 of the lid main body 10 and the inner peripheral portion 31 of the receiving frame 30. .
- an annular gap G2 is formed between the lid first surface portion 18 and the lid second surface portion 68 and the receiving frame first surface portion 42, and the lid second surface portion 68 and the receiving frame first
- the two surface portions 66 are in contact with each other.
- the present invention is not limited to this, and the elastic modulus of the outer peripheral portion 11 of the lid body 10 and the inner peripheral portion 31 of the receiving frame 30, the outer peripheral surface 12 of the outer peripheral portion 11 of the lid main body 10, and the inner peripheral surface of the inner peripheral portion 31 of the receiving frame 30.
- the contact state between the lid second surface portion 68 and the receiving frame second surface portion 66 can be controlled by setting the diameter dimension and the angle 34.
- At least one of the lid first surface portion 18 and the lid second surface portion 68 may be at least in contact with at least one of the receiving frame first surface portion 42 and the receiving frame second surface portion 66. Further, due to the elastic deformation of the outer peripheral portion 11 of the lid main body 10 and the inner peripheral portion 31 of the receiving frame 30, the lid first surface portion 18 and the lid second surface portion 68, the receiving frame first surface portion 42 and the receiving frame second surface portion 66 are almost the entire surface. There may be a case where the annular gap G2 is not formed.
- the receiving frame first surface portion 42 and the receiving frame second surface portion 66 are successively formed below the flat surface 38 of the receiving frame support portion 40 in order, and below the flat surface 19 of the lid flat receiving portion 16.
- the lid first surface portion 18 and the lid second surface portion 68 are successively formed.
- the present invention is not limited to this, and the receiving frame support portion 40 and the receiving frame first surface portion 42, and the receiving frame first surface portion 42 and the receiving frame second surface portion 66 may be formed discontinuously as in the case of the first embodiment.
- the lid flat receiving portion 16 and the lid first surface portion 18, and the lid first surface portion 18 and the lid second surface portion 68 may be formed discontinuously.
- FIG. 10 is a vertical cross-sectional view of the main part of the underground structure lid according to Embodiment 3 of the present invention.
- the inner peripheral surface 34 formed on the inner peripheral portion 31 of the receiving frame 30 of the present embodiment includes a flat receiving-shaped receiving frame support portion 40 continuous with the upper surface 36 of the receiving frame 30, and a receiving frame first surface portion 42 below the receiving frame support portion 40. And a receiving frame third surface portion 44 below the receiving frame first surface portion 42.
- the receiving frame third surface portion 44 is formed below the receiving frame first surface portion 42 so as to increase in diameter toward the lower side of the receiving frame 30 with a gradient. Specifically, the receiving frame third surface portion 44 forms a gradient ⁇ opposite to that of the receiving frame first surface portion 42 in a range of 0 ° to 9 °. In this embodiment, the receiving frame third surface portion 44 is formed with a gradient ⁇ of 4 °.
- the outer peripheral surface 12 formed on the outer peripheral portion 11 of the lid main body 10 includes a lid flat receiving portion 16 continuous with the upper surface 14 of the lid main body 10, a lid first surface portion 18 below the lid flat receiving portion 16, and a lid. It is composed of a lid third surface portion 26 below the first surface portion 18.
- the lid third surface portion 26 is formed below the lid first surface portion 18 so as to increase in diameter toward the bottom of the lid body 10 with a gradient. Specifically, the lid third surface portion 26 forms a gradient ⁇ opposite to the lid first surface portion 18 in the range of 0 ° to 10 °. In the present embodiment, the lid third surface portion 26 has a slope ⁇ of 5 °. As shown in FIG. 11, when the lid body 10 is stored in the receiving frame 30, the lower part of the lid third surface portion 26 and the receiving frame first surface portion 42 start to contact each other. When the lid body 10 is further housed in the receiving frame 30, at least one of the outer peripheral portion 11 of the lid main body 10 and the inner peripheral portion 31 of the receiving frame 30 is elastically deformed. In the case of the present embodiment, as shown in FIG. 11, the outer peripheral portion 11 of the lid body 10 is greatly elastically deformed so as to be reduced in diameter from the natural state indicated by the broken line in the radial direction indicated by the solid line.
- the lid third surface portion 26 gets over the boundary 46 between the receiving frame first surface portion 42 and the receiving frame third surface portion 44, and the lid first surface portion 18 and the lid first surface portion.
- the boundary portion 28 with the three-surface portion 26 is substantially coincident with the boundary portion 46, and the lid main body 10 is in the proper closed position of the receiving frame 30.
- the lid flat receiving portion 16 is supported by the receiving frame supporting portion 40, so that the weight applied by the weight of the lid main body 10 and the vehicle traveling on the lid main body 10 is supported by the receiving frame supporting portion 40.
- the lid third surface portion 26 and the receiving frame third surface portion 44 are in contact with each other over the entire circumference, and the lid third surface portion 26 and the receiving frame third surface portion are pressed by the pressing force due to the elastic deformation of the outer peripheral portion 11 of the lid body 10. 44 are pressed against each other.
- the outer peripheral portion 11 of the lid main body 10 is restrained from the inner peripheral portion 31 of the receiving frame 30 in a state of being prevented from coming off by pressing the expanded third lid surface portion 26 and the receiving frame third surface portion 44 together.
- the pressing force in this case is a restoring force generated when the outer peripheral portion 11 of the lid main body 10 is elastically deformed by the deflection amount ⁇ from the natural state of FIG. 10, and from the lid third surface portion 26 to the receiving frame third surface portion 44.
- the lid body 10 acts in the diameter increasing direction.
- the lid third surface portion 26 and the receiving frame third surface portion 44 are pressed against each other by the pressing force generated by the elastic deformation of the outer peripheral portion 11 of the lid body 10, thereby suppressing the radial movement of the lid body 10.
- the pressing force due to the elastic deformation of the outer peripheral portion 11 of the lid main body 10 acts, so that when the lid main body 10 tries to move in the vertical direction, the lid third surface portion 26 and the receiving frame first A frictional force is generated between the three surface portions 44 and the movement of the lid body 10 in the vertical direction is suppressed. Therefore, it is possible to prevent the excessive biting force of the lid main body 10 from being received into the receiving frame 30 by the flat receiving-shaped receiving frame support portion 40 and the lid flat receiving portion 16. Furthermore, rattling, vibration, noise, and sliding of the lid main body 10 can be suppressed by the pressing force and frictional force generated between the outer peripheral portion 11 of the lid main body 10 and the inner peripheral portion 31 of the receiving frame 30. .
- the lid third surface portion 26 and the receiving frame third surface portion 44 are pressed against each other by the pressing force due to the elastic deformation of the outer peripheral portion 11 of the lid body 10. Furthermore, the outer peripheral portion 11 of the lid main body 10 is restrained from the inner peripheral portion 31 of the receiving frame 30 in a state of being prevented from coming off by pressing the expanded third lid surface portion 26 and the receiving frame third surface portion 44 together. For this reason, it is preferable that the vertical movement of the lid body 10 can be more effectively suppressed by the restraint by the pressing force, the frictional force, and the retaining prevention as compared with the case of the first and second embodiments.
- the inherent elastic coefficient of the outer peripheral portion 11 of the lid main body 10, the section coefficient of the outer peripheral portion 11 of the lid main body 10, and the inner periphery of the receiving frame 30 is largely elastically deformed by setting the inherent elastic coefficient of the part 31 and the section modulus of the inner peripheral part 31 of the receiving frame 30.
- the present invention is not limited to this, and setting the inner peripheral portion 31 of the receiving frame 30 to be elastically deformed greatly also causes both the outer peripheral portion 11 of the lid body 10 and the inner peripheral portion 31 of the receiving frame 30 to be elastically deformed appropriately. Can also be set.
- FIG. 13 is a longitudinal cross-sectional view of the principal part of the lid
- symbol is attached
- the inner peripheral surface 34 formed on the inner peripheral portion 31 of the receiving frame 30 of the present embodiment is a flat receiving-shaped receiving frame support portion 40 that is continuous with the upper surface 36 of the receiving frame 30, and a receiving frame support portion.
- the outer peripheral surface 12 formed on the outer peripheral portion 11 of the lid main body 10 includes a lid flat receiving portion 16 continuous with the upper surface 14 of the lid main body 10, a lid first surface portion 18 below the lid flat receiving portion 16, and a lid.
- the lid third surface portion 26 below the first surface portion 18 and the lid fourth surface portion 50 below the lid third surface portion 26 are configured.
- the lid fourth surface portion 50 is formed with a diameter that is reduced toward the bottom of the lid body 10 with a gradient below the lid third surface portion 26.
- the lid fourth surface portion 50 is formed with a gradient having an angle equal to that of the receiving frame first surface portion 42.
- the lid fourth surface portion 50 and the receiving frame first surface portion 42 start to come into contact with each other, and when the lid main body 10 is further stored in the receiving frame 30, At least one of the outer peripheral portion 11 and the inner peripheral portion 31 of the receiving frame 30 is elastically deformed.
- the outer peripheral portion 11 of the lid body 10 is greatly elastically deformed so as to be reduced in diameter from the natural state indicated by the broken line in the radial direction indicated by the solid line.
- the lid third surface portion 26 and the lid fourth surface portion 50 get over the boundary portion 46 between the receiving frame first surface portion 42 and the receiving frame third surface portion 44 and
- the boundary portion 28 between the first surface portion 18 and the lid third surface portion 26 is substantially in alignment with the boundary portion 46, and the lid main body 10 is in the normal lid position of the receiving frame 30.
- the lid flat receiving portion 16 is supported by the receiving frame support portion 40, so that the weight of the lid main body 10, the vehicle, and the like are added by traveling on the lid main body 10.
- the load is supported by the receiving frame support portion 40.
- the lid third surface portion 26 and the receiving frame third surface portion 44 are in contact with each other over the entire circumference, and the lid third surface portion 26 and the receiving frame third surface portion are pressed by the pressing force due to the elastic deformation of the outer peripheral portion 11 of the lid body 10. 44 are pressed against each other.
- the outer peripheral portion 11 of the lid main body 10 is restrained from the inner peripheral portion 31 of the receiving frame 30 in a state of being prevented from coming off by pressing the expanded third lid surface portion 26 and the receiving frame third surface portion 44 together.
- the pressing force in this case is a restoring force generated as the outer peripheral portion 11 of the lid main body 10 is elastically deformed by the deflection amount ⁇ from the natural state of FIG.
- the cover body 10 acts in the diameter increasing direction from the three surface portions 26 to the receiving frame third surface portion 44.
- the lid fourth surface portion 50 is formed with a gradient having an angle equal to that of the receiving frame first surface portion 42, so that when the lid main body 10 is placed in the receiving frame 30, FIG.
- the receiving frame first surface portion 42 can function as a guide surface of the lid fourth surface portion 50, so that the lid body 10 can be smoothly closed, and the operator can close the lid.
- the burden can be greatly reduced.
- FIG. 16 is a longitudinal cross-sectional view of the principal part of the lid
- symbol is attached
- the inner peripheral surface 34 formed on the inner peripheral portion 31 of the receiving frame 30 of the present embodiment is a flat receiving-shaped receiving frame support portion 40 that is continuous with the upper surface 36 of the receiving frame 30, and a receiving frame support portion. 40 and a receiving frame first surface portion 42 below 40.
- the outer peripheral surface 12 formed on the outer peripheral portion 11 of the lid main body 10 includes a lid flat receiving portion 16 continuous with the upper surface 14 of the lid main body 10 and a lid first surface portion 18 below the lid flat receiving portion 16. ing.
- the lid first surface portion 18 is formed by a plurality of projecting portions 64 projecting at intervals in the circumferential direction below the lid flat receiving portion 16. Further, as shown in FIGS. 16 and 17, a recess 62 is provided at the base end of the protrusion 64 so as to surround the protrusion 64.
- the lid flat receiving portion 16 is supported by the receiving frame support portion 40, so that the weight of the lid main body 10, the vehicle, etc. A load applied by traveling is supported by the receiving frame support 40. Furthermore, the lower part of the lid first surface part 18 and the lower part of the receiving frame first surface part 42 come into contact with each other, and the lid first surface part 18 moves the receiving frame first surface part 42 by the pressing force due to the elastic deformation of the outer peripheral part 11 of the lid body 10. Press.
- the base end of the protrusion 64 is provided with the recess 62 so as to surround the protrusion 64. For this reason, it becomes possible to ensure the height of the protrusion 64 high while keeping the height of the lid body (the height from the upper surface 14 of the lid body 10 to the lower end of the protrusion 64) at a predetermined height. It is preferable because the elastic deformation of the portion 64 can be promoted.
- the lid first surface portion 18 is formed by the protruding portion 64, but the present invention is not limited to this, and the receiving frame first surface portion 42 may be formed by the protruding portion.
- the present invention is not limited to the above embodiments, and various modifications are possible.
- the shapes of the lid body 10 and the receiving frame 30 are not limited to the above-described embodiments, and can be used for a square underground structure as long as the pressing force and the frictional force accompanying the elastic deformation of each part described above can be generated.
- various other modifications such as a lid can be considered.
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Abstract
Description
なお、本願明細書でいう「地下構造物用蓋」とは、下水道における地下埋設物,地下構造施設等と地上とを通じる開口部を開閉可能に閉塞するマンホール蓋,大型鉄蓋,汚水桝蓋、電力・通信における地下施設機器や地下ケーブル等を保護する開閉可能な共同溝用鉄蓋,送電用鉄蓋,配電用鉄蓋、上水道やガス配管における路面下の埋設導管およびその付属機器と地上とを結ぶ開閉扉としての機能を有する消火栓蓋,制水弁蓋,仕切弁蓋,空気弁蓋,ガス配管用蓋,量水器蓋等を総称する。 The present invention relates to a lid for an underground structure including a lid main body and a receiving frame that supports the lid main body so that the lid main body can be opened and closed.
As used herein, the term “underground structure lid” refers to a manhole cover, large iron cover, sewage culm lid that can be opened and closed so that an opening through the ground can be opened and closed. , Openable openable gutter lids, power transmission lids, power distribution iron lids, underground conduits in waterworks and gas pipes and their associated equipment and ground Fire hydrant lids, water control valve lids, gate valve lids, air valve lids, gas piping lids, water meter lids, etc. that function as open / close doors that connect
これに対し、勾配受構造の地下構造物用蓋として、特許文献1には、蓋本体の外周部の勾配面および受枠の内周部の勾配面の鉛直に対する傾斜角度を5°~10°に限定するとともに、蓋本体の外周部の勾配面の高さを受枠の内周部の勾配面の高さよりも小さくしたものが記載されている。特許文献1に記載のものでは、上記のように勾配面の角度を限定することにより、蓋本体の受枠に対する食い込み力を充分確保させることができ、蓋本体のがたつき、振動、騒音を著しく抑えることができるとともに、蓋本体のずり上がりも殆ど起こさないという効果を奏することができる。 However, in an underground structure lid with a flat receiving structure, the outer diameter of the lid body is slightly smaller than the inner diameter of the receiving frame, so that there is a gap between the outer peripheral portion of the lid main body and the inner peripheral portion of the receiving frame. There is. For this reason, when the vehicle repeatedly passes over the lid for the underground structure, the bottom surface of the lid body and the top surface of the shelf of the receiving frame may wear, and the lid body may rattle, generate vibration, and noise. It was.
On the other hand, as a lid for an underground structure having a gradient receiving structure,
そこで、本発明が解決しようとする課題は、蓋本体のがたつき、振動、騒音を抑えることができるとともに、蓋本体の受枠への過剰な食い込み力が発生することを防止して適度な労力で開蓋を行うことができ、受枠に対する蓋本体のずり上がりも防止することができる地下構造物用蓋を提供することにある。 However, in the underground structure lid described in
Accordingly, the problem to be solved by the present invention is that the lid body can be prevented from rattling, vibration, and noise, and an excessive bite force to the receiving frame of the lid body can be prevented to generate an appropriate amount of labor. It is an object of the present invention to provide a lid for an underground structure that can be opened with a lid and can prevent the lid body from sliding up with respect to the receiving frame.
好ましくは、最初に蓋本体を受枠に納めて閉蓋状態とするとき、蓋本体の外周部の外周面または下面と、受枠の内周部の内周面とが当接することにより、蓋本体の外周部および/または受枠の内周部が、弾性変形による押圧力が残る状態で塑性変形する。 Preferably, the outer peripheral portion of the lid body has a lid fourth surface portion formed by reducing the diameter toward the lower side of the lid body with a gradient of the same angle as the receiving frame first surface portion below the lid third surface portion.
Preferably, when the lid main body is first placed in the receiving frame to be in the closed state, the outer peripheral surface or the lower surface of the outer peripheral portion of the lid main body and the inner peripheral surface of the inner peripheral portion of the receiving frame abut, The outer peripheral part and / or the inner peripheral part of the receiving frame are plastically deformed in a state in which a pressing force due to elastic deformation remains.
好ましくは、複数の切欠部および/または複数の貫通孔部は、蓋第1面部から下方に位置する蓋本体の外周部および/または受枠第1面部から下方に位置する受枠の内周部に設けている。 Preferably, a plurality of notches and / or a plurality of through holes are provided in the circumferential direction on the outer peripheral portion of the lid body and / or the inner peripheral portion of the receiving frame.
Preferably, the plurality of cutout portions and / or the plurality of through-hole portions are provided on the outer peripheral portion of the lid main body located below the lid first surface portion and / or the inner peripheral portion of the receiving frame located below the first frame surface portion of the receiving frame. ing.
好ましくは、突出部の基端には、突出部を囲むように凹部が設けられている。
好ましくは、蓋本体の裏面に補強リブを有し、補強リブの端部は、蓋本体の外周部の内周壁と離間している。 In the underground structure lid of the present invention, the outer peripheral portion of the lid main body located below the lid first surface portion and / or the inner peripheral portion of the receiving frame located below the first frame surface portion are spaced apart in the circumferential direction. It is characterized in that it is formed by a plurality of projecting portions that are opened and protruded.
Preferably, a recess is provided at the base end of the protrusion so as to surround the protrusion.
Preferably, a reinforcing rib is provided on the back surface of the lid body, and an end portion of the reinforcing rib is separated from the inner peripheral wall of the outer peripheral portion of the lid body.
具体的には、蓋第1面部と受枠第1面部とが、または蓋第1面部および蓋第2面部の少なくとも何れか一方と、受枠第1面部および受枠第2面部の少なくとも何れか一方とが、または蓋第3面部と受枠第3面部とが、蓋本体の外周部および受枠の内周部の少なくとも何れか一方の弾性変形による押圧力で互いに押圧され、これにより蓋本体の径方向の動きが抑制される。さらには、蓋本体が上下方向へ動こうとする際に、押圧力により、蓋第1面部と受枠第1面部の間に、または蓋第1面部および蓋第2面部の少なくとも何れか一方と、受枠第1面部および受枠第2面部の少なくとも何れか一方との間に、または蓋第3面部と受枠第3面部との間に、摩擦力が生じ、蓋本体の上下方向への動きも抑制される。したがって、蓋本体の受枠への過剰な食い込み力が発生することを防止できるとともに、蓋本体の外周部と受枠の内周部との間に発生する押圧力および摩擦力によって、蓋本体のがたつき、振動、騒音、ずり上がりを抑えることができる。 According to the present invention, in the closed state of the lid body, the weight of the lid body and the load applied when the vehicle or the like travels on the lid body are supported by the flat receiving frame support portion. It is possible to prevent an excessive biting force from being generated in the receiving frame.
Specifically, the lid first surface portion and the receiving frame first surface portion, or at least one of the lid first surface portion and the lid second surface portion, and at least one of the receiving frame first surface portion and the receiving frame second surface portion are included. Alternatively, the lid third surface portion and the receiving frame third surface portion are pressed against each other by a pressing force caused by elastic deformation of at least one of the outer peripheral portion of the lid main body and the inner peripheral portion of the receiving frame, and thereby the radial movement of the lid main body Is suppressed. Furthermore, when the lid body tries to move in the up and down direction, due to the pressing force, between the lid first surface portion and the receiving frame first surface portion, or at least one of the lid first surface portion and the lid second surface portion, A frictional force is generated between at least one of the receiving frame first surface portion and the receiving frame second surface portion, or between the lid third surface portion and the receiving frame third surface portion, and the movement of the lid main body in the vertical direction is also suppressed. The Therefore, it is possible to prevent an excessive biting force from being generated on the receiving frame of the lid body and to prevent the lid body from being loosened by the pressing force and the frictional force generated between the outer peripheral portion of the lid main body and the inner peripheral portion of the receiving frame. Sticking, vibration, noise and sliding can be suppressed.
図1に示すように、本発明に係る地下構造物用蓋は、蓋本体10と、この蓋本体10を内周部で開閉可能に支持する受枠30とを備え、蓋本体10と受枠30とは図示しない蝶番金物によって連結されている。この地下構造物用蓋は、球状黒鉛鋳鉄により形成されており、例えばマンホールの上部側塊の上端部に基礎調整部を介して取り付けられ、蓋本体10の上面14が地表面と面一となるように設置される。
<実施例1> Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the lid for an underground structure according to the present invention includes a
<Example 1>
受枠支持部40は、受枠30の上面36から受枠30の下方に向けて連続した鉛直面37を形成し、鉛直面37の下方に受枠30の径方向、すなわち水平方向に平坦な環状の平坦面38を形成している。 FIG. 2 is a longitudinal cross-sectional view of the main part of the underground structure lid according to
The receiving
一方、蓋本体10の外周部11に形成した外周面12は、蓋本体10の上面14に連続した蓋平受け部16と、蓋平受け部16の下方の蓋第1面部18とから構成している。 The receiving frame
On the other hand, the outer
蓋第1面部18は、蓋平受け部16の下方において受枠第1面部42よりも急な勾配をもって蓋本体10の下方に向けて縮径して形成している。具体的には、蓋第1面部18はその勾配βを0°~9°の範囲に形成している。なお、本実施例において蓋第1面部18は勾配βを1°で形成している。 The lid flat receiving
The lid
なお、以降の説明で使用する「弾性変形」は、弾性変形による押圧力が残る状態での塑性変形を含む概念として定義する。 When the lid
Note that “elastic deformation” used in the following description is defined as a concept including plastic deformation in a state where a pressing force due to elastic deformation remains.
以上のように本実施例では、蓋本体10の閉蓋状態において、平受け状の受枠支持部40において蓋本体10の自重および車輌等が蓋本体10上を走行することによって加わる荷重が支持され、蓋本体10の受枠30への過剰な食い込み力が発生することを防止できる。さらには、蓋本体10の外周部11の弾性変形による押圧力により、蓋第1面部18と受枠第1面部42とが互いに押圧されることにより蓋本体10の径方向の動きが抑制される。 The pressing force in this case is a restoring force generated when the outer
As described above, in this embodiment, when the
図4に示すように本実施例の蓋本体10の外周部11には、その周方向に、例えば蓋第1面部18に複数の切欠部48を略等間隔にスリット状に配設している。蓋本体10の外周部11に複数の切欠部48をスリット状に配設することにより、蓋本体10の外周部11の剛性が低下するため、蓋本体10の外周部11の弾性変形をより一層促進させることができて好適である。 As shown in FIGS. 2, 3, and 5, for example, lattice-shaped reinforcing
As shown in FIG. 4, a plurality of
また、切欠部の形状はスリット状に限らず、図6に示すように略T字状の切欠部48としても良い。なお、蓋本体10の外周部11や受枠30の内周部31の弾性変形をより一層促進させる上では、切欠部48ではなく、貫通孔部49としてもよく、図6では、切欠部48の一部を、窓枠状の貫通孔部49としている。 In the present embodiment, the plurality of
Further, the shape of the notch is not limited to the slit shape, and may be a substantially T-shaped
<実施例2> In the present embodiment, the receiving frame
<Example 2>
本実施例の受枠30の内周部31に形成した内周面34は、受枠30の上面36に連続した平受け状の受枠支持部40と、受枠支持部40の下方の受枠第1面部42と、さらに受枠第1面部42の下方の受枠第2面部66とから構成している。 FIG. 8 is a longitudinal cross-sectional view of the main part of the underground structure lid according to Embodiment 2 of the present invention. In addition, about the location which overlaps with Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.
The inner
蓋第1面部18は、蓋平受け部16の下方において受枠第1面部42よりも急な勾配をもって蓋本体10の下方に向けて縮径して形成している。また、蓋第2面部68は、蓋第1面部18の下方において、蓋第1面部18と同じ向きだが異なる勾配をもって蓋本体10の下方に向けて縮径して形成している。具体的には、蓋第1面部18はその勾配βを0°~9°の範囲で形成し、蓋第2面部68はその勾配β1を0°より大きく形成している。なお、本実施例において、蓋第1面部18は勾配βを3°で形成し、蓋第2面部68は勾配β1を蓋第1面部18よりも緩勾配となる6°で形成している。 On the other hand, the outer
The lid
以上のように本実施例では、実施例1の場合と同様に、蓋本体10の閉蓋状態において、平受け状の受枠支持部40において蓋本体10の自重および車輌等が蓋本体10上を走行することによって加わる荷重が支持され、蓋本体10の受枠30への過剰な食い込み力が発生することを防止できる。さらには、蓋本体10の外周部11の弾性変形による押圧力により、蓋本体10の径方向の動きが抑制され、また、閉蓋状態において蓋第2面部68と受枠第2面部66との間に摩擦力が生じ、蓋本体10の上下方向への動きが抑制される。したがって、蓋本体10の受枠30への過剰な食い込み力が発生することを防止することができる。さらには、蓋本体10の外周部11と受枠30の内周部31との間に発生する押圧力および摩擦力によって、蓋本体10のがたつき、振動、騒音、ずり上がりを抑えることができる。 The pressing force in this case is a restoring force generated when the outer
As described above, in the present embodiment, as in the case of the first embodiment, when the
<実施例3> In the present embodiment, the receiving frame
<Example 3>
本実施例の受枠30の内周部31に形成した内周面34は、受枠30の上面36に連続した平受け状の受枠支持部40と、受枠支持部40の下方の受枠第1面部42と、さらに受枠第1面部42の下方の受枠第3面部44とから構成している。 FIG. 10 is a vertical cross-sectional view of the main part of the underground structure lid according to Embodiment 3 of the present invention. In addition, about the location which overlaps with Example 1 or Example 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.
The inner
一方、蓋本体10の外周部11に形成した外周面12は、蓋本体10の上面14に連続した蓋平受け部16と、蓋平受け部16の下方の蓋第1面部18と、さらに蓋第1面部18の下方の蓋第3面部26とから構成している。 The receiving frame
On the other hand, the outer
図11に示すように、蓋本体10を受枠30に納める際に、蓋第3面部26の下方と受枠第1面部42とが当接を開始する。さらに蓋本体10を受枠30に納めると、蓋本体10の外周部11および受枠30の内周部31の少なくとも何れか一方が弾性変形する。なお、本実施例の場合、図11に示すように蓋本体10の外周部11が破線で示す自然状態から実線で示す径方向に縮径されるようにして大きく弾性変形している。 The lid
As shown in FIG. 11, when the
以上のように本実施例では、実施例1および実施例2の場合と同様に、蓋本体10の閉蓋状態において、平受け状の受枠支持部40において蓋本体10の自重および車輌等が蓋本体10上を走行することによって加わる荷重が支持され、蓋本体10の受枠30への過剰な食い込み力が発生することを防止できる。さらには、蓋本体10の外周部11の弾性変形による押圧力により、蓋第3面部26と受枠第3面部44とが互いに押圧されることにより蓋本体10の径方向の動きが抑制される。 The pressing force in this case is a restoring force generated when the outer
As described above, in the present embodiment, in the same manner as in the first and second embodiments, when the lid
<実施例4> In the present embodiment, as in the case of the first and second embodiments, the inherent elastic coefficient of the outer
<Example 4>
本実施例の受枠30の内周部31に形成した内周面34は、実施例3の場合と同様に、受枠30の上面36に連続した平受け状の受枠支持部40と、受枠支持部40の下方の受枠第1面部42と、さらに受枠第1面部42の下方の受枠第3面部44とから構成している。 FIG. 13: is a longitudinal cross-sectional view of the principal part of the lid | cover for underground structures which concerns on Example 4 of this invention. In addition, about the location which overlaps with Example 1 thru | or Example 3, the same code | symbol is attached | subjected and description is abbreviate | omitted.
As in the case of the third embodiment, the inner
蓋第4面部50は、蓋第3面部26の下方において、勾配をもって蓋本体10の下方に向けて縮径して形成している。なお、本実施例では、蓋第4面部50を受枠第1面部42と等しい角度の勾配をもって形成している。 On the other hand, the outer
The lid
以上のように本実施例の場合には、蓋第4面部50を受枠第1面部42と等しい角度の勾配をもって形成したことにより、蓋本体10を受枠30に納めるとき、実施例3の図11に示す場合に比べて、受枠第1面部42を蓋第4面部50のガイド面として機能させることができるため、蓋本体10を円滑に閉蓋することが可能となり、作業者の閉蓋作業の負担を大幅に軽減することができる。
<実施例5> The pressing force in this case is a restoring force generated as the outer
As described above, in the case of the present embodiment, the lid
<Example 5>
本実施例の受枠30の内周部31に形成した内周面34は、実施例1の場合と同様に、受枠30の上面36に連続した平受け状の受枠支持部40と、受枠支持部40の下方の受枠第1面部42とから構成している。 FIG. 16: is a longitudinal cross-sectional view of the principal part of the lid | cover for underground structures which concerns on Example 5 of this invention. In addition, about the location which overlaps with Example 1 thru | or Example 4, the same code | symbol is attached | subjected and description is abbreviate | omitted.
As in the case of the first embodiment, the inner
蓋第1面部18は、蓋平受け部16の下方において、周方向に間隔をあけて複数突出させた突出部64により形成している。また、突出部64の基端には、図16および図17に示すように、突出部64を囲むように凹部62が設けられている。 On the other hand, the outer
The lid
なお、本実施例では、蓋第1面部18を突出部64により形成しているが、これに限らず、受枠第1面部42を突出部により形成する場合も有り得る。 As described above, in this embodiment, the base end of the
In the present embodiment, the lid
例えば、蓋本体10および受枠30の形状は上記各実施例に限定されるものではなく、前記した各部の弾性変形に伴う押圧力および摩擦力を発生可能であれば、角型の地下構造物用蓋など、他にも種々の変形が考えられるのは勿論である。 The present invention is not limited to the above embodiments, and various modifications are possible.
For example, the shapes of the
16 蓋平受け部
18 蓋第1面部
20 裏面
22 補強リブ
24 端部
26 蓋第3面部
30 受枠
40 受枠支持部
42 受枠第1面部
44 受枠第3面部
48 スリット(切欠部)
50 蓋第4面部
66 受枠第2面部
68 蓋第2面部 DESCRIPTION OF
50 Lid
Claims (10)
- 蓋本体と、前記蓋本体を内周部で開閉可能に支持する受枠とを備えた地下構造物用蓋であって、
前記受枠の内周部は、
平受け状の受枠支持部と、
前記受枠支持部の下方において勾配をもって前記受枠の下方に向けて縮径して形成される受枠第1面部とを有し、
前記蓋本体の外周部は、
前記受枠支持部に支持される蓋平受け部と、
前記蓋平受け部の下方において、前記蓋本体の下方に向けて鉛直に、または前記受枠第1面部よりも急な勾配をもって前記蓋本体の下方に向けて縮径して、形成される蓋第1面部とを有し、
前記蓋本体の閉蓋状態において、前記蓋平受け部が前記受枠支持部に支持されるとともに、前記蓋第1面部と前記受枠第1面部とが前記蓋本体の外周部および前記受枠の内周部の少なくとも何れか一方の弾性変形による押圧力により互いに押圧されることを特徴とする地下構造物用蓋。 A lid for an underground structure comprising a lid body and a receiving frame that supports the lid body so as to be openable and closable at an inner periphery thereof,
The inner periphery of the receiving frame is
A flat receiving frame support,
A receiving frame first surface portion formed by reducing the diameter toward the lower side of the receiving frame with a gradient below the receiving frame supporting portion;
The outer periphery of the lid body is
A lid flat receiving portion supported by the receiving frame supporting portion;
Below the lid flat receiving part, the diameter of the lid is formed by reducing the diameter vertically toward the lower side of the lid main body or with a steeper slope than the first surface part of the receiving frame toward the lower side of the lid main body. One surface part,
In the closed state of the lid body, the lid flat receiving portion is supported by the receiving frame support portion, and the lid first surface portion and the receiving frame first surface portion are an outer peripheral portion of the lid main body and an inner periphery of the receiving frame. A lid for an underground structure that is pressed against each other by a pressing force caused by elastic deformation of at least one of the sections. - 蓋本体と、前記蓋本体を内周部で開閉可能に支持する受枠とを備えた地下構造物用蓋であって、
前記受枠の内周部は、
平受け状の受枠支持部と、
前記受枠支持部の下方において勾配をもって前記受枠の下方に向けて縮径して形成される受枠第1面部と、
前記受枠第1面部の下方において前記受枠第1面部と異なる勾配をもって前記受枠の下方に向けて縮径して形成される受枠第2面部とを有し、
前記蓋本体の外周部は、
前記受枠支持部に支持される蓋平受け部と、
前記蓋平受け部の下方において、前記蓋本体の下方に向けて鉛直に、または前記受枠第1面部よりも急な勾配をもって前記蓋本体の下方に向けて縮径して、形成される蓋第1面部と、
前記蓋第1面部の下方において前記蓋第1面部と異なる勾配をもって前記蓋本体の下方に向けて縮径して形成される蓋第2面部とを有し、
前記蓋本体の閉蓋状態において、前記蓋平受け部が前記受枠支持部に支持されるとともに、前記蓋第1面部および前記蓋第2面部の少なくとも何れか一方と、前記受枠第1面部および前記受枠第2面部の少なくとも何れか一方とが前記蓋本体の外周部および前記受枠の内周部の少なくとも何れか一方の弾性変形による押圧力により互いに押圧されることを特徴とする地下構造物用蓋。 A lid for an underground structure comprising a lid body and a receiving frame that supports the lid body so as to be openable and closable at an inner periphery thereof,
The inner periphery of the receiving frame is
A flat receiving frame support,
A receiving frame first surface portion formed by reducing the diameter toward the lower side of the receiving frame with a gradient below the receiving frame supporting portion;
A receiving frame second surface portion formed by reducing the diameter toward the lower side of the receiving frame with a different gradient from the receiving frame first surface portion below the receiving frame first surface portion;
The outer periphery of the lid body is
A lid flat receiving portion supported by the receiving frame supporting portion;
Below the lid flat receiving part, the diameter of the lid is formed by reducing the diameter vertically toward the lower side of the lid main body or with a steeper slope than the first surface part of the receiving frame toward the lower side of the lid main body. One side,
A lid second surface portion formed by reducing the diameter toward the lower portion of the lid body with a gradient different from that of the lid first surface portion below the lid first surface portion;
In the closed state of the lid body, the lid flat receiving portion is supported by the receiving frame supporting portion, and at least one of the lid first surface portion and the lid second surface portion, the receiving frame first surface portion, and the A lid for an underground structure, wherein at least one of the receiving frame second surface portions is pressed against each other by a pressing force generated by elastic deformation of at least one of the outer peripheral portion of the lid main body and the inner peripheral portion of the receiving frame. . - 蓋本体と、前記蓋本体を内周部で開閉可能に支持する受枠とを備えた地下構造物用蓋であって、
前記受枠の内周部は、
平受け状の受枠支持部と、
前記受枠支持部の下方に形成される受枠第1面部と、
前記受枠第1面部の下方において、前記受枠の下方に向けて鉛直に、または勾配をもって前記受枠の下方に向けて拡径して、形成される受枠第3面部とを有し、
前記蓋本体の外周部は、
前記受枠支持部に支持される蓋平受け部と、
前記蓋平受け部の下方に形成される蓋第1面部と、
前記蓋第1面部の下方において、前記蓋本体の下方に向けて鉛直に、または勾配をもって前記蓋本体の下方に向けて拡径して、形成される蓋第3面部とを有し、
前記蓋本体の閉蓋状態において、前記蓋平受け部が前記受枠支持部に支持されるとともに、前記蓋第3面部と前記受枠第3面部とが前記蓋本体の外周部および前記受枠の内周部の少なくとも何れか一方の弾性変形による押圧力により互いに押圧されることを特徴とする地下構造物用蓋。 A lid for an underground structure comprising a lid body and a receiving frame that supports the lid body so as to be openable and closable at an inner periphery thereof,
The inner periphery of the receiving frame is
A flat receiving frame support,
A receiving frame first surface portion formed below the receiving frame support portion;
A receiving frame third surface portion formed below the receiving frame first surface portion, vertically extending toward the lower portion of the receiving frame or with a gradient toward the lower portion of the receiving frame;
The outer periphery of the lid body is
A lid flat receiving portion supported by the receiving frame supporting portion;
A lid first surface portion formed below the lid flat receiving portion;
Below the lid first surface portion, the lid third surface portion is formed by expanding the diameter vertically toward the lower portion of the lid body or with a gradient toward the lower portion of the lid body,
In the closed state of the lid body, the lid flat receiving portion is supported by the receiving frame supporting portion, and the lid third surface portion and the receiving frame third surface portion are an outer peripheral portion of the lid main body and an inner periphery of the receiving frame. A lid for an underground structure that is pressed against each other by a pressing force caused by elastic deformation of at least one of the sections. - 前記蓋本体の外周部は、前記蓋第3面部の下方において前記受枠第1面部と等しい角度の勾配をもって前記蓋本体の下方に向けて縮径して形成される蓋第4面部を有することを特徴とする請求項3に記載の地下構造物用蓋。 The outer peripheral portion of the lid body has a lid fourth surface portion formed by reducing the diameter toward the lower side of the lid body with a gradient at an angle equal to that of the receiving frame first surface portion below the lid third surface portion. The lid | cover for underground structures of Claim 3 characterized by the above-mentioned.
- 最初に前記蓋本体を前記受枠に納めて閉蓋状態とするとき、前記蓋本体の外周部の外周面または下面と、前記受枠の内周部の内周面とが当接することにより、前記蓋本体の外周部および/または前記受枠の内周部が、弾性変形による押圧力が残る状態で塑性変形することを特徴とする請求項1乃至請求項4のいずれか1項に記載の地下構造物用蓋。 When the lid main body is first placed in the receiving frame to be in the closed state, the outer peripheral surface or the lower surface of the outer peripheral portion of the lid main body and the inner peripheral surface of the inner peripheral portion of the receiving frame abut, The underground structure according to any one of claims 1 to 4, wherein the outer peripheral portion of the main body and / or the inner peripheral portion of the receiving frame undergoes plastic deformation in a state in which a pressing force due to elastic deformation remains. Lid.
- 前記蓋本体の外周部および/または前記受枠の内周部には、周方向に複数の切欠部および/または複数の貫通孔部を設けたことを特徴とする請求項1乃至請求項5のいずれか1項に記載の地下構造物用蓋。 6. The outer peripheral portion of the lid body and / or the inner peripheral portion of the receiving frame are provided with a plurality of notches and / or a plurality of through-hole portions in the circumferential direction. The lid for underground structures according to claim 1.
- 前記複数の切欠部および/または前記複数の貫通孔部は、前記蓋第1面部から下方に位置する前記蓋本体の外周部および/または前記受枠第1面部から下方に位置する前記受枠の内周部に、設けたことを特徴とする請求項6に記載の地下構造物用蓋。 The plurality of cutout portions and / or the plurality of through-hole portions are an outer peripheral portion of the lid main body located below the lid first surface portion and / or an inner circumference of the receiving frame located below the receiving frame first surface portion. The lid for an underground structure according to claim 6, wherein the lid is provided in the section.
- 前記蓋第1面部から下方に位置する前記蓋本体の外周部および/または前記受枠第1面部から下方に位置する前記受枠の内周部は、周方向に間隔をあけて複数突出させた突出部により形成したことを特徴とする請求項1乃至請求項5のいずれか1項に記載の地下構造物用蓋。 The outer peripheral part of the lid main body located below from the first surface part of the lid and / or the inner peripheral part of the receiving frame located below from the first surface part of the receiving frame are protruded by a plurality of protrusions spaced in the circumferential direction. The lid for an underground structure according to any one of claims 1 to 5, wherein the lid is for an underground structure.
- 前記突出部の基端には、前記突出部を囲むように凹部が設けられていることを特徴とする請求項8に記載の地下構造物用蓋。 The base for the projecting part is provided with a recess so as to surround the projecting part.
- 前記蓋本体の裏面に補強リブを有し、
前記補強リブの端部は、前記蓋本体の外周部の内周壁と離間していることを特徴とする請求項1乃至請求項9のいずれか1項に記載の地下構造物用蓋。 Reinforcing ribs on the back of the lid body,
10. The underground structural lid according to claim 1, wherein an end of the reinforcing rib is separated from an inner peripheral wall of an outer peripheral portion of the lid main body.
Priority Applications (2)
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JP2015513672A JP6324374B2 (en) | 2013-04-22 | 2014-04-09 | Cover for underground structure |
CN201480028772.4A CN105229237B (en) | 2013-04-22 | 2014-04-09 | cover for underground structure |
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PCT/JP2014/060299 WO2014175070A1 (en) | 2013-04-22 | 2014-04-09 | Cover for underground structure |
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CN (1) | CN105229237B (en) |
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KR102461136B1 (en) * | 2021-12-30 | 2022-11-03 | 주식회사 건영엔지니어링 | Rib type manhole cover |
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JP4817231B2 (en) * | 2003-05-13 | 2011-11-16 | 株式会社ライセンス&プロパティコントロール | Cover for underground structure |
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2014
- 2014-04-09 JP JP2015513672A patent/JP6324374B2/en active Active
- 2014-04-09 WO PCT/JP2014/060299 patent/WO2014175070A1/en active Application Filing
- 2014-04-09 CN CN201480028772.4A patent/CN105229237B/en active Active
- 2014-04-16 TW TW103113808A patent/TWI620854B/en active
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JPS499059U (en) * | 1972-04-22 | 1974-01-25 | ||
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EP2312064A1 (en) * | 2009-10-09 | 2011-04-20 | Furnes-Hamjern SCC AS | Manhole closure |
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Also Published As
Publication number | Publication date |
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TWI620854B (en) | 2018-04-11 |
TW201504497A (en) | 2015-02-01 |
CN105229237B (en) | 2017-04-26 |
JP6324374B2 (en) | 2018-05-16 |
CN105229237A (en) | 2016-01-06 |
JPWO2014175070A1 (en) | 2017-02-23 |
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