JP4169627B2 - Construction method of lid installed on the ground surface and closure for construction of underground structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention provides a lid installed on the ground surface in order to close the top opening of the riser tube so that it can be opened and closed when installing a lid for inspection and cleaning on the riser pipes of underground structures such as drainage basins and manholes. The construction method of this invention, and the obturator for construction of the underground structure used for the construction method.
[0002]
[Prior art]
  Generally, a lid is installed on the upper surface of the riser pipe of underground structures such as drainage basins and manholes for inspection and cleaning. Normally, when installing a riser pipe of an underground structure, After installing a frame with a lid that can be opened and closed at the top opening of the riser, the upper surface of the frame and the lid and the surrounding ground surface are finished to the same surface with a paving material such as concrete. Paving.
[0003]
  However, when performing such construction, the pavement material may protrude from the upper surface of the frame or lid, and if the pavement material adhering to the frame or lid is solidified in this state, the lid may not be opened or closed. Therefore, when constructing, it is necessary to pay sufficient attention so that the paving material does not protrude from the upper surface of the frame or lid. If the pavement material protrudes from the upper surface of the frame or lid, it is necessary to peel off and remove the protruding pavement material. There was a problem that the work of paving was very time-consuming.
[0004]
  In order to solve such problems, conventionally, a protective film coated with an adhesive is applied to the upper surface of the frame and lid, and then the ground surface around the frame and lid is paved with concrete or the like. And after this paving work is completed, a method is adopted in which the protective film is peeled off from the frame and the lid.
[0005]
  However, when a protective film is attached to the upper surface of the frame and lid, if the operator steps on the frame or lid during work, the adhesive tape adhesive applied to the protective film causes the frame or lid to adhere. There is a problem that the frame body and the lid body are soiled easily.
[0006]
  Therefore, with the frame body and the cover body installed at the upper surface opening of the riser tube, the disk-shaped cover section covering the upper surface of the frame body and the cover body, and a projecting vertically downward from the periphery of the cover section A covering cover having a skirt portion that can be inserted into a gap between the fitting surfaces of the frame body and the lid body is known (for example, see Patent Document 1).
[0007]
  Since this conventional covering cover can insert the skirt portion of the covering cover into the gap between the frame body and the lid body to cover the upper surface of the frame body and the lid body with the covering portion, When paving the ground surface around the frame that supports the lid, it is possible to prevent the pavement material from sticking to the upper surface of the frame or the lid and sticking to the frame or the lid.
[0008]
[Patent Document 1]
          Utility Model Registration No. 256931 (2nd page, 3rd page, FIG. 3, FIG. 4)
[0009]
[Problems to be solved by the invention]
  However, there are many taper fitting structures in which the fitting surface between the lid and the frame is tapered so that a gap for inserting the skirt portion of the covering cover is not formed. Especially, the frame used for manholes and cleaning ports for sewage In the case of the body and the lid, in order to prevent rainwater from flowing into the manhole and the cleaning port, there is no gap formed in order to maintain the water tightness on the fitting surface of the frame and the lid. In many cases, the skirt portion of the conventional covering cover cannot be inserted into the gap between the frame and the lid.
[0010]
  Further, even if there is a gap in the fitting surface between the frame and the lid, and the skirt portion of the conventional covering cover can be inserted into the fitting surface between the frame and the lid, the conventional covering cover is used. When the surface of the frame body and the lid body is covered, the covering portion of the covering cover has a certain thickness, so the upper surface of the frame body and the lid body and the ground surface around the frame body and the lid body are the same surface. In order to achieve this, it is necessary to perform paving with the ground surface at the peripheral edge of the frame body being provided with a level difference that is lower than the thickness of the covering cover, which has the problem that it takes time for paving work.
[0011]
  The present invention has been made in view of such points, and is installed on the ground surface, which can easily paved the ground surface around the frame body and the lid body on the same surface as the upper surfaces of the frame body and the lid body. An object of the present invention is to provide a lid construction method and a closure for construction of an underground structure used in this construction method.
[0012]
[Means for Solving the Problems]
  The construction method of the lid | cover installed in the ground surface of Claim 1 forms in the taper surface which has an outer diameter substantially equal to the riser pipe and frame of an underground structure, or the outer peripheral surface expanded upwards. The lower part has an outer diameter equal to that of the rising pipe and the frame, and is blocked by the upper opening edge of the rising pipe to close the upper opening of the rising pipePartThe obturator body of the formed construction obturator is provided, the obturator body is temporarily fixed and supported at the upper surface opening of the riser tube, and the upper opening of the riser tube is blocked by the obturator body. Refill the tube to finish the ground surface to the same surface as the upper surface of the obturator body, and after finishing the ground surface, pull out the obturator body and open the lid so that the lid can be opened and closed. It is to be attached to.
[0013]
  Then, when the riser pipe of the underground structure is backfilled and the ground surface is finished by paving or the like, the upper surface opening of the riser pipe of the underground structure temporarily supports and supports the obturator body of the construction obturator. The upper surface of the riser can be closed, and dirt and the like can be prevented from entering the riser.
[0014]
  In addition, after the riser pipe is backfilled and the ground surface is finished, the obturator for construction can be used repeatedly by pulling out the obturator body from the upper surface opening of the riser pipe, reducing the amount of waste generated. It can be reduced to prevent environmental pollution, and on the upper surface of the frame and lidStickyThe appearance of the lid body and the frame body is not impaired without the adhesive remaining.
[0015]
  The construction method of the lid | cover installed in the ground surface of Claim 2 WHEREIN: The obstruction for construction is a substantially cylindrical insertion part which has an outer diameter fitted by the inner peripheral part of a riser pipe, and this insertion. An obturator that is provided at the top of the portion and has an outer diameter substantially equal to the outer diameter of the riser tube, and is formed by a closure portion that is locked to the upper opening edge of the riser tube and closes the upper surface opening of the riser tube Comprising a main body, with the insertion part of the obturator main body fitted to and supported by the upper surface opening of the rising pipe of the underground structure, the dimension from the upper surface opening edge to the upper surface of the obstruction partFrame with lid openableA body is fitted to and supported by the upper surface opening of the riser, and the upper surface opening of the underground structure is formed to have a size substantially equal to the dimension from the upper surface opening edge to the upper surface of the lid and the frame. A first step of inserting an insertion portion of the obturator body into a portion, temporarily fixing and supporting the obturator body to an upper portion of the rising pipe, and closing the upper surface opening by the obstruction portion of the obturator body; A second step of backfilling the riser to finish the ground surface around the riser to the same surface as the upper surface of the obturator body, a third step of pulling out the obturator body, and the underground structure A frame having a lid that can be opened and closed at an upper surface opening of the riser is attached to an upper surface opening of the riser so that the upper surface of the frame and the lid is flush with the ground surface. The process consists of
[0016]
  The obturator body has a dimension from the upper surface opening edge of the riser tube to the upper surface of the obstruction portion of the obturator body, with the frame body fitted to and supported by the upper surface opening portion of the riser tube, the lid body and the frame. Since the dimensions of the obturator body are approximately equal to the upper surface of the body, the ground surface around the frame body and the lid body can be Finishing such as paving can be easily done on the same surface as the upper surface of the body and lid.
[0017]
  In addition, when constructing a frame body that supports the lid on the inner peripheral surface at the upper surface opening of the riser pipe of the underground structure, the frame body and Regardless of the presence or absence of a gap between the frame and the fitting surface that can be freely opened and closed, the frame and the lid are installed in the process of constructing the riser of the underground structure and finishing the ground surface. It will not be soiled with finishing materials such as paving materials.
[0018]
  The obstruction for construction of an underground structure according to claim 3 is used when attaching a frame body provided with a lid to the upper surface opening of the riser pipe of the underground structure, and is temporarily fixed to the upper part of the riser pipe. An obturator for construction of an underground structure that supports and closes the upper surface opening, the obturator comprising an obturator body molded with a synthetic resin and a handle, A substantially cylindrical insertion portion having an outer diameter fitted to the inner peripheral portion of the riser, and an outer diameter provided at an upper portion of the insertion portion and substantially equal to the outer diameter of the riser A closing portion that is locked to the upper surface opening edge of the tube and closes the upper surface opening portion of the rising tube, the handle is attached to the upper surface of the obturator body, and the insertion portion of the obturator body is connected to the underground structure. Fitted and supported in the top opening of the riser The dimension from the upper surface opening edge to the upper surface of the closing portion is measured from the upper surface opening edge to the lid body and the upper surface of the frame body in a state where the frame body is fitted to and supported by the upper surface opening portion of the riser tube. It is formed to have a dimension substantially equal to the dimension.
[0019]
  And the dimension from the upper surface opening edge of the riser pipe to the upper surface of the obstruction part of the obturator body in a state where the insertion part of the obturator body is fitted and supported to the upper surface opening part of the riser pipe of the underground structure, Since the dimensions from the upper opening edge to the upper surface of the lid body and the frame body are approximately equal to each other when fitted to and supported by the upper surface opening of the riser pipe, The ground surface around the body can be easily finished flush with the upper surfaces of the frame and lid.
[0020]
  Also, when constructing a substantially cylindrical frame that supports the lid on the inner peripheral surface at the upper surface opening of the riser pipe of the underground structure, the obturator body is temporarily supported on the upper part of the riser pipe. Since the upper surface of the riser can be easily blocked, it is possible to prevent soil and sand from entering the riser when the riser is buried in the underground structure and the ground surface is finished to paving. The frame and lid are not soiled.
[0021]
  Furthermore, since the obturator body is integrally formed, used waste such as a seal is not generated during construction.
[0022]
  In addition, the obturator body is temporarily fixed to the upper opening edge of the riser pipe when the underground pipe is buried and the ground surface is finished. Since the tool can be pulled out from the upper opening of the riser and used repeatedly, the amount of waste generated can be reduced to prevent environmental pollution.
[0023]
  The obstruction for construction of the underground structure according to claim 4 is:Used to install a frame with a lid on the upper surface opening of the riser pipe of the underground structure, and to install the underground structure that temporarily supports and supports the upper opening of the riser pipe to close the upper surface opening The obturator comprises an obturator body molded with a synthetic resin and a handle, and the obturator body has an outer diameter fitted to the inner periphery of the rising tube. A substantially cylindrical insert, and an upper portion of the insert, andOuter surfaceTheFormed on a tapered surface with diameter increasing upwardAnd has a closing portion that is locked to the upper surface opening edge of the rising tube and closes the upper surface opening of the rising tube, the handle is attached to the upper surface of the obturator body, and the insertion portion of the obturator body is The size from the upper surface opening edge to the upper surface of the closed portion is fitted and supported to the upper surface opening of the rising pipe in a state of being fitted and supported to the upper surface opening of the rising pipe of the underground structure. In a state, it is formed to have a dimension substantially equal to the dimension from the upper surface opening edge to the upper surface of the lid body and the frame body.It is what.
[0024]
  AndWhen the obturator body is pulled out from the riser pipe after the obturator body is temporarily fixed and supported on the upper part of the riser pipe and the ground surface around the obturator body is finished, the outer peripheral surface of the obstruction part of the obturator body faces upward. It is formed on the taper surface expanded in diameter, so that it is generated between the outer peripheral surface of the obstructing part and the pavement material that contacts the outer peripheral surface of the obstructing part when an upward pulling load is applied to the obturator body. The frictional resistance is reduced, and the operator can pull out the obturator body from the rising tube with a small force.
[0025]
  Claim5The obstruction for construction of the underground structure described in claim 3Or 4In the obstruction for construction of the underground structure described above, the riser pipe of the underground structure is a riser pipe provided at the cleaning port of the drainage basin.The
[0026]
  And by using a construction closure when embedding the riser pipe of the drainage cleaning port, the ground surface around the riser pipe can be attached to the top opening of the riser and the lid can be opened and closed freely. It can be easily finished to the same surface as the upper surface of the frame body provided on.
[0027]
  Claim6The obstruction for construction of the underground structure described in claim 3Or any of 5In the obstruction for construction of the underground structure described above, on the upper surface of the obstruction portion of the obturator body, a handle accommodating portion having a depth substantially equal to the thickness of the handle is formed, and the handle is in a state of being overlaid on the handle accommodating portion. It is arrange | positioned by.
[0028]
  And since the handle is disposed in the handle housing portion at a height position substantially equal to the upper surface of the closed portion in the prone state, even if the operator puts his feet on the upper surface of the closed portion during work, the operator Does not feel instability in the feet or damage the handle.
[0029]
  Claim7The obstruction for construction of the described underground structure is claimed in claim6In the obstruction for construction of the described underground structure, the handle has a shaft portion that is rotated approximately 90 degrees and is held in a substantially vertical state when the obturator body is pulled out from the upper surface opening of the rising pipe.
[0030]
  And when a handle pulls out an obturator main body from the upper surface opening part of the rising pipe of an underground structure, it rotates about 90 degree | times, hold | maintains in a substantially perpendicular state, and pulls out an obturator main body easily. be able to.
[0031]
  Claim8The obstruction for construction of the described underground structure is claimed in claim7In the construction construction closure for the underground structure described above, when the handle is raised and gripped in a substantially vertical direction, it has a retaining means for preventing the handle from being detached from the closure part.
[0032]
  Even if an upward pulling load is applied to the handle, the stopper prevents the handle from being detached from the obstruction portion of the obturator body. The handle is prevented from easily detaching from the obstructing portion of the obturator body when being pulled out from the obturator.
[0033]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, an embodiment of an obstruction for construction of an underground structure according to the present invention will be described with reference to the drawings.
[0034]
  In FIG. 9, a drainage basin 1 as an underground structure is formed of synthetic resin or the like, and is connected to an inflow port 3 communicated via the invert part 2 at both ends of the invert part 2 formed on the inner bottom part. An outlet 4 is opened, the inlet 3 is connected to an upstream drain pipe 5 communicating with a drainage facility such as a household, and the outlet 4 is connected to a downstream drain pipe 6.
[0035]
  Further, the drainage basin 1 is provided with a substantially cylindrical cleaning port 7 located above the invert portion 2, and a substantially cylindrical rising portion is formed in the opening 8 opened on the upper surface of the cleaning port 7. The lower end side of the tube 9 is fitted and the upper end portion of the rising tube 9 is opened upward.
[0036]
  A frame body 12 is installed in the upper surface opening 11 opened at the upper end of the riser tube 9. The frame 12 has a substantially cylindrical fitting insertion portion 13 having an outer diameter substantially the same as the inner diameter of the riser tube 9, and a diameter larger than that of the fitting insertion portion 13. A substantially cylindrical frame body portion 15 is formed, and an annular locking step portion 14 that is locked to the upper surface opening edge 10 of the rising pipe 9 is formed by expanding the diameter of the frame body portion 15. Further, an annular support portion 16 projects from the inner peripheral portion of the frame body portion 15, and a substantially disc-shaped lid body 17 fitted to the support portion 16 is supported so as to be freely opened and closed.
[0037]
  Further, the upper surface of the frame body 12 and the upper surface of the lid body 17 supported by the frame body 12 are flush with the ground surface 18 finished by paving or the like.
[0038]
  As shown in FIG. 1, the obturator body 21 of the construction obturator 20 is temporarily fixed to the upper surface opening 11 of the riser tube 9, and the upper surface opening 11 of the riser tube 9 is blocked by this obstruction. It is closed by the tool body 21.
[0039]
  This construction obturator 20 will be described with reference to FIGS.
[0040]
  As shown in FIGS. 4 and 5, the obturator body 21 molded of synthetic resin has a substantially cylindrical shape at the bottom and an insertion portion 22 having an outer diameter that can be inserted into the inner peripheral portion of the rising tube 9. At the lower end of the outer periphery of the insertion portion 22, a fitting recess 23 of the packing 40 that is pressed against the inner periphery of the rising tube 9 is formed in an annular shape.
[0041]
  AndThe interpolation part twenty two At the top of the interpolator twenty two The diameter of the riser tube 9 and the frame body are increased. 12 Has an outer diameter approximately equal to orIn the upper part of the insertion part 22,This interpolation part twenty two More diameter than the outer peripheral surface 26 Is a tapered surface with the diameter expanded upward 27 Formed in the lower part and the rising tube 9 and the frame body 12 Having an outer diameter substantially equal to the outer diameter ofA blocking portion 24 having an upper surface as a lid portion 29 is provided.
[0042]
  Further, a locking step portion 25 is formed at the lower end portion of the closing portion 24 by a difference in diameter between the insertion portion 22 and the closing portion 24. The obturator body 21 having a diameter larger than the upper portion of the locking step portion 25 is fitted into the upper surface opening portion 11 of the riser tube 9 so that the locking step portion 25 is supported by the upper surface opening edge 10. It has become.
[0043]
  A meat stealing recess 28 is formed in an annular shape on the upper surface of the closing portion 24 on the outer peripheral surface 26 side.
[0044]
  Further, the lid portion 29 of the closing portion 24 is configured so that the insertion portion 22 of the obturator main body 21 is fitted to and supported by the upper surface opening portion 11 of the rising tube 9 and the upper opening opening edge of the rising tube 9 10 to the upper surface of the lid portion 29 of the obturator main body 21 with the frame body 12 fitted and supported by the upper surface opening portion 11 of the riser tube 9 to the lid body from the upper surface opening edge 10. 17 and the dimensions up to the upper surface of the frame 12 are formed to be substantially equal.
[0045]
  Furthermore, on the upper surface of the lid portion 29, a handle housing portion 30 formed in a substantially concave groove shape in cross section is formed in a substantially U shape in plan view. The depth of the groove of the handle accommodating part 30 is substantially the same as the thickness dimension of the handle 31 described later in a state where the handle 31 described later is disposed in the prone state, and the handle 31 is in the prone state. It is designed to be accommodated.
[0046]
  In addition, a semicircular recess 32 for gripping the handle is formed in a concave curved surface along the outer edge side of the generally central portion of the handle housing 30 in plan view. Furthermore, shaft stop holes 34 and 34 for pivotally locking a shaft portion 33 of a handle 31, which will be described later, are formed on opposite inner side surfaces of both ends of the handle housing portion 30 so as to face each other. On both outer side portions of both ends of the handle accommodating portion 30, retaining protrusions 35 for preventing shaft portions 33, 33 of a handle 31 to be described later from moving in a direction away from the shaft retaining holes 34, 34, 35 are projected. The retaining protrusions 35 and 35 protrude from the shaft stopper holes 34 and 34 at positions shifted toward both ends of the handle housing 30.
[0047]
  As shown in FIG. 8, a handle 31 is accommodated in the handle accommodating portion 30 of the obturator main body 21. As shown in FIGS. 6 and 7, the handle 31 is formed in a substantially U shape by a synthetic resin or the like, and both end portions 36 and 36 of the handle 31 are formed in an arcuate surface. Then, shaft portions 33, 33 are respectively provided in a projecting manner inside the both end portions 36, 36 of the handle 31, and the tip portions located on both end sides of the shaft portions 33, 33 are respectively connected to the shafts. Notched surfaces 37 and 37 that are notched in an inclined shape so as to be easily inserted into the stop holes 34 and 34 are formed.
[0048]
  Further, the handle 31 is formed with the retaining protrusions 39 of the shaft portions 33, 33 at both end portions 36, 36 on the outer surface side, respectively, and the shaft retaining holes 34, 34 are continuous with the retaining protrusion 39. Escape recesses 39a and 39a are formed when the shaft portions 33 and 33 are inserted into the shafts 33 and 33, respectively. The relief recesses 39a and 39a are imaginary on the outer surface side of the both end portions 36 and 36 of the handle 31 with the both end portions 36 and 36 being part of the circumference centering on the axis of the shaft portions 33 and 33. It is formed on the circumference of a central angle of about 90 degrees, which is about a quarter of a circle. The retaining protrusions 39 and the retaining protrusions 35 and 35 of the lid 29 form a retaining means 35A.
[0049]
  Next, the operation of this embodiment will be described.
[0050]
  First, as shown in FIG. 9, the upstream drain pipe 5 is connected to the inlet 3 of the drain 1 installed in the excavation part, and the downstream drain pipe 6 is connected to the outlet 4. A rising pipe 9 is inserted into the cleaning port 7 of the drain 1.
[0051]
  As shown in FIG. 1, the insertion portion 22 of the obturator main body 21 of the construction obturator 20 is installed in the upper surface opening 11 of the riser 9 before the frame 12 having the lid 17 is installed. Are engaged with each other, and the engaging step portion 25 of the obturator main body 21 is locked to the upper opening edge 10 of the rising tube 9 and temporarily supported, and the upper opening 11 of the rising tube 9 is closed. It is closed by the closing portion 24 of the tool body 21 (first step).
[0052]
  In this state, it is possible to prevent earth and sand from entering the riser 9 and the frame body 12 and the lid body 17 are not soiled.
[0053]
  Next, as shown in FIG. 1, the top surface of the lid portion 29 of the obturator body 21 is backfilled with soil, and the ground surface 18 is finished by paving with a paving material or the like. The upper surface of 24 is formed on the same surface as the lid portion 29 (second step).
[0054]
  The dimension from the upper opening edge 10 of the rising tube 9 to the upper surface of the closing portion 24 of the obturator main body 21 in a state where the insertion portion 22 of the obturator main body 21 is fitted and supported by the upper surface opening 11 of the rising tube 9. Since the size of the frame body 12 is substantially the same as the dimension from the upper surface opening edge 10 to the lid body 17 and the upper surface of the frame body 12 in a state in which the frame body 12 is fitted to and supported by the upper surface opening portion 11 of the riser tube 9, the lid body 17 is provided to be freely opened and closed When constructing the frame body 12, the ground surface 18 around the frame body 12 and the lid body 17 can be easily paved to the same surface as the upper surfaces of the frame body 12 and the lid body 17.
[0055]
  In addition, since the handle 31 accommodated in the handle accommodating portion 30 of the lid portion 29 of the obturator main body 21 is at a height position substantially equal to the upper surface of the obstruction portion 24 in the lying down state, the operator Even if the feet are placed on the upper surface of 24, the operator does not feel instability under the feet, and the handle 31 is not damaged.
[0056]
  Next, as shown in FIG. 2, after the finished surface such as the paving material around the obturator main body 21 is solidified, the obturator main body 21 is pulled out from the upper surface opening 11 of the rising tube 9 (third step). When the obturator body 21 is pulled out, the finger is inserted into the gripping recess 32 formed in the lid portion 29 of the obturator body 21 and stored in a state of being laid down in the handle accommodating portion 30 of the lid portion 29. The handle 31 is turned up approximately 90 degrees to raise the handle 31 in a substantially vertical state. In this state, the handle 31 is gripped and an upward pulling load is applied to the handle 31 to thereby form the obturator body 21. Is pulled out from the upper surface opening 11 of the rising tube 9.
[0057]
  Further, the retaining protrusions 39 of the handle 31 are engaged with the retaining protrusions 35 and 35 of the lid 29 to prevent the both end portions 36 and 36 of the handle 31 from spreading apart from each other. Therefore, even if an upward pulling load is applied to the handle 31, both end portions 36, 36 of the handle 31 do not expand to both sides. When being pulled out from 11, the both shaft portions 33, 33 of the handle 31 are not easily detached from the shaft stop holes 34, 34 of the lid portion 29.
[0058]
  And the taper surface 27 whose diameter is increased toward the upper part of the outer peripheral surface 26 of the closure part 24 of the obturator body 21 becomes a pull-out taper, and when an upward pulling load is applied to the obturator body 21, The frictional resistance generated between the outer peripheral surface 26 and the pavement material in contact with the outer peripheral surface 26 of the closed portion 24 is reduced, and the obturator main body 21 can be easily pulled out from the rising tube 9.
[0059]
  Next, as shown in FIG. 3, a frame 12 having a lid 17 that can be opened and closed is attached to the upper surface opening 11 of the riser tube 9, and the upper surfaces of the frame 12 and the lid 17 are Installed on the same surface as the paved ground surface 18 (fourth step).
[0060]
  The upper surface opening 11 of the riser 9 is provided with the frame 12 and the lid 17 after the process of forming the ground surface 18 by paving or the like, so that the skirt portion of the conventional covering cover is provided. Compared with a configuration (for example, Patent Document 1) in which finish paving is performed in a state in which the upper surface of the frame body and the lid body is covered with the covering portion by being inserted into the gap between the frame body and the lid body, Regardless of the presence or absence of a gap between the fitting surface and the lid body 17 that can be freely opened and closed, the frame body 12 and the lid body 17 can be constructed without being soiled.
[0061]
  Further, the obturator main body 21 is temporarily attached to the upper opening edge 10 of the riser pipe 9 when the riser pipe 9 is buried and the ground surface 18 is finished by finishing pavement or the like. By pulling out from the upper surface opening 11 of 9, the construction obturator 20 can be used repeatedly, and used waste such as a seal is not generated during construction. Therefore, it is possible to reduce the amount of waste generated and prevent environmental pollution.
[0062]
  In this embodiment, when the handle 31 is accommodated in the handle accommodating portion 30 of the lid portion 29 of the obturator main body 21, the both end portions 36, 36 of the handle 31 are moved from the obliquely inclined state. The handle 31 is inserted into the handle accommodating portion 30 of the lid portion 29 while opening in the separating direction. At this time, since the relief recesses 39a, 39a of the handle 31 are positioned on the retaining projections 35, 35 of the lid portion 29, the handle 31 can be removed without being caught by the retaining projections 35, 35. It can be accommodated in the accommodating part 30. When the shafts 33 and 33 of the handle 31 are aligned with the opening positions of the shaft stop holes 34 and 34 of the handle housing portion 30, the separation of the both end portions 36 and 36 of the handle 31 is released. The shaft portions 33 and 33 are fitted and locked in shaft stop holes 34 and 34 of the handle housing portion 30, respectively. In this state, the handle 31 is tilted down and stored in the handle housing part 30 in a prone state.
[0063]
  In this embodiment, the obstruction for construction of the underground structure includes a obturator main body 21 for closing the upper surface opening 11 of the riser tube 9 inserted into the cleaning port 7 of the drainage 1. Although the construction obturator 20 has been described, the construction obturator 20 is not limited to this, and the construction obturator 20 closes the upper surface openings of various risers such as the riser pipe provided in the inspection hole of the manhole. Can be used for
[0064]
【The invention's effect】
  According to the method of the present invention, when refilling the rise pipe of the underground structure and paving the ground surface, the obturator body of the construction obturator is temporarily fixed and supported at the upper surface opening of the rise pipe of the underground structure. As a result, the upper surface of the riser can be closed, and dirt and the like can be prevented from entering the riser.
[0065]
  In addition, after the riser pipe is backfilled and the ground surface is finished, the obturator for construction can be used repeatedly by pulling out the obturator body from the upper surface opening of the riser pipe, reducing the amount of waste generated. It can be reduced to prevent environmental pollution and the top surface of the frame and lidStickyIt is not soiled by an adhesive or the like, and the appearance of the lid and the frame is not impaired.
[0066]
  In addition, by inserting and supporting the insertion part of the obturator body in the upper surface opening of the riser pipe of the underground structure, the ground surface around the frame body and the lid body can be easily attached to the upper surface of the frame body and the lid body. It can be formed on the same surface and paved.
[0067]
  According to the obturator for construction of the present invention, the insertion portion of the obturator body is fitted to and supported by the upper surface opening of the riser pipe of the underground structure, so that the obstruction part of the obturator body from the upper surface opening edge of the riser pipe The frame up to the upper surface of the frame is substantially equal to the size from the upper surface opening edge to the lid body and the upper surface of the frame body in a state in which the frame body is fitted and supported in the upper surface opening of the riser tube. When the body is installed, the ground surface around the frame body and the lid body can be easily finished to be flush with the upper surfaces of the frame body and the lid body.
[0068]
  In addition, when backfilling the ground surface by backfilling the riser pipe of the underground structure, the upper surface of this riser pipe is blocked by temporarily supporting the obturator body on the upper part of the riser pipe, It is possible to prevent earth and sand from entering the riser pipe, and the frame body and the lid body are not soiled.
[0069]
  Furthermore, since the obturator body is integrally formed, used waste such as a seal is not generated during construction.
[0070]
  In addition, after finishing the ground surface, such as paving, the construction closure can be pulled out from the top opening of the riser and used repeatedly, reducing the amount of waste generated and preventing environmental pollution. can do.
[0071]
In addition, the taper surface formed on the outer peripheral surface of the obturator portion of the obturator body causes the pavement to contact the outer peripheral surface of the obturator portion and the outer peripheral surface of the obturator portion when an upward pulling load is applied to the obturator main body. The frictional resistance generated between the material and the like becomes small, and the operator can pull out the obturator body from the rising tube with a small force.
[0072]
  Furthermore, the handle is disposed in the handle housing portion at a height position substantially equal to the upper surface of the closed portion in the lying state, so that even if the operator puts his / her foot on the upper surface of the closed portion during work, There is no feeling of instability under the feet and the handle is not damaged.
[0073]
  Further, the obturator body can be easily pulled out of the riser tube by rotating the handle by about 90 degrees and holding and gripping the handle in a substantially vertical state.
[0074]
  Furthermore, even if an upward pulling load is applied to the handle, the retaining means can prevent the handle from being detached from the obstructing portion of the obturator body, and the obturator body can be reliably removed from the upper surface opening of the riser pipe of the underground structure. Can be pulled out.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of a state in which an upper surface opening of a rising pipe of an underground structure showing a method for installing a lid installed on the ground surface of the present invention is closed with a closing tool.
FIG. 2 is a longitudinal side view of the obturator main body pulled out from the riser.
FIG. 3 is a longitudinal side view showing a state in which a frame is attached to the riser tube.
FIG. 4 is a plan view of the obturator body of the obturator for constructing an underground structure showing an embodiment of the present invention.
FIG. 5 is a longitudinal side view taken along the line AA of the obturator main body.
FIG. 6 is a plan view of the handle.
FIG. 7 is a front view of the handle.
FIG. 8 is a plan view showing a state where a handle is attached to the obturator body.
FIG. 9 is a vertical side view showing a state in which a frame is attached to the upper surface opening of the riser tube inserted into the cleaning port.
[Explanation of symbols]
        1 Drainage as an underground structure
        7 Cleaning mouth
        9 Rising pipe
        10 Top opening edge
        11 Top opening
        12 Frame
        17 Lid
        18 Ground surface
        20 Construction obturator
        21 Obturator body
        22 Interpolation
        24 Blocking part
        26 Outer surface
        27 Tapered surface
        30 Handle compartment
        31 Toride
        33 Shaft
        35A retaining means

Claims (8)

It has an outer diameter substantially equal to the riser pipe and the frame of the underground structure, or has an outer diameter formed into a tapered surface with the diameter increased upward, and the lower part has an outer diameter substantially equal to the riser pipe and the frame, and The obturator main body of the construction obturator that is locked to the upper surface opening edge of the riser tube and that forms an obstruction that closes the upper surface opening of the riser tube,
Temporarily fixing and supporting the obturator body on the upper surface opening of the riser pipe,
Finishing the ground surface to the same plane as the upper surface of the obturator body by backfilling the riser pipe in a state where the upper surface opening of the riser tube is blocked by the obturator body,
A construction method for a lid installed on the ground surface, wherein the frame body provided with a lid body that can be opened and closed by pulling out the obturator body after finishing the ground surface is attached to the upper surface opening of the riser pipe. The construction obturator includes a substantially cylindrical insertion portion having an outer diameter fitted to the inner peripheral portion of the riser pipe, and an outer portion provided on the upper portion of the insertion pipe and substantially equal to the outer diameter of the riser pipe. A closure body having a diameter and a closure portion that is locked to the upper opening edge of the rising tube and that closes the upper opening of the rising tube;
In the state where the insertion part of the obturator main body is fitted and supported to the upper surface opening of the riser pipe of the underground structure, the lid body is provided to be openable and closable from the upper surface opening edge to the upper surface of the obstruction. In a state in which the frame body is fitted to and supported by the upper surface opening of the riser, it is formed to have a dimension substantially equal to the dimension from the upper surface opening edge to the lid and the upper surface of the frame body,
An insertion portion of the obturator body is inserted into the upper surface opening of the riser pipe of the underground structure to temporarily support the obturator body on the upper portion of the riser pipe, and the upper surface opening is blocked by the obturator body. A first step of closing by the part;
A second step of backfilling the riser to finish the ground surface around the riser to the same surface as the upper surface of the obturator body;
A third step of pulling out the obturator body;
The frame body in which the lid is provided to be freely opened and closed at the upper surface opening of the riser pipe of the underground structure is attached to the upper surface opening of the riser pipe, and the upper surface of the frame body and the cover body is flush with the ground surface. A method for constructing a lid to be installed on the ground surface, characterized by comprising the fourth step. Used to install a frame with a lid on the upper surface opening of the riser pipe of the underground structure, and to install the underground structure that temporarily supports and supports the upper opening of the riser pipe to close the upper surface opening Obturator for use,
This obturator is
The obturator body and handle are molded with synthetic resin.
This obturator body
A substantially cylindrical insertion portion having an outer diameter fitted to the inner peripheral portion of the riser;
It has an outer diameter which is provided at the upper part of this insertion part and has an outer diameter substantially equal to the outer diameter of the riser tube, and which is locked to the upper opening edge of the riser tube and closes the upper surface opening of the riser tube ,
Attach the handle to the upper surface of the obturator body,
In a state where the insertion part of the obturator body is fitted and supported to the upper surface opening of the riser pipe of the underground structure, the dimensions from the upper surface opening edge to the upper surface of the obstruction part are set, and the frame is used as the riser pipe. An obturator for construction of an underground structure, which is formed to have a size substantially equal to the size from the upper surface opening edge to the upper surface of the lid body and the frame body in a state where the upper surface opening portion is fitted and supported. Used to install a frame with a lid on the upper surface opening of the riser pipe of the underground structure, and to install the underground structure that temporarily supports and supports the upper opening of the riser pipe to close the upper surface opening Obturator for use,
This obturator is
The obturator body and handle are molded with synthetic resin.
This obturator body
A substantially cylindrical insertion portion having an outer diameter fitted to the inner peripheral portion of the riser;
A blocking portion that is provided on the upper portion of the insertion portion and has an outer peripheral surface that is formed into a tapered surface whose diameter is increased upward, and that is locked to the upper opening edge of the rising tube and closes the upper opening of the rising tube And attach the handle to the upper surface of the obturator body,
In a state where the insertion part of the obturator body is fitted and supported to the upper surface opening of the riser pipe of the underground structure, the dimensions from the upper surface opening edge to the upper surface of the obstruction part are set, and the frame is used as the riser pipe. An obturator for construction of an underground structure, which is formed to have a size substantially equal to the size from the upper surface opening edge to the upper surface of the lid body and the frame body in a state where the upper surface opening portion is fitted and supported. 5. The obstruction for construction of an underground structure according to claim 3, wherein the rising pipe of the underground structure is a rising pipe provided at a cleaning port of a drainage basin. 4. A handle housing portion having a depth substantially equal to the thickness of the handle is formed on the upper surface of the closure portion of the obturator body, and the handle is disposed in a lying state in the handle housing portion. The obstruction | occlusion tool for construction of the underground structure in any one of thru | or 5. 7. The construction of an underground structure according to claim 6, wherein the handle has a shaft portion that is rotated by about 90 degrees and is held in a substantially vertical state when the obturator body is pulled out from the upper surface opening of the rising pipe. Obturator. In the handle housing portion of the obturator body, shaft stop holes for pivotally supporting the shaft portions provided inside the both ends of the handle are formed opposite to each other,
The handle housing portion is provided with a protruding protrusion that prevents the handle shaft portion from moving in a direction to detach from the shaft stop hole when the handle is raised and held in a substantially vertical direction. The obturator for construction of an underground structure according to claim 7.

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