【０００１】
【発明の属する技術分野】
本発明は、道路などに設けられる地下構築物の地上開口部に設けられる蓋板の受枠に関するもので、特に円盤状の蓋板面を地表面と一致させるための高さ調節機構のついた地下構築物用の蓋板の受枠に関するものである。
【０００２】
【従来の技術】
従来より、道路なとに設けられる下水道の点検用マンホール、上水道に設けられる消火栓筐、制水弁筺なと、また地中に埋設された電気、通信などのケーブルの分岐点などに設けられる地中箱などの地下構築物の地上開口部には、鋳鉄装の円盤状の蓋とその受枠が、蓋板面が地表面と一致するよううに取付けられる。
【０００３】
このように施工された地下構築物用の蓋板の受枠は、道路の舗装の補修などのため蓋板面と地表面の間に段差が生ずることがあり、蓋板面を地表面と一致させるため嵩上げをする必要が生ずる。この場合、受枠の周囲を露出させて受枠と地下構築物との間に平座金などを挿入し高さを調節する方法がとられており、平座金の形状および挿入方法に関し多くの提案が見受けられる。
【０００４】
このような受枠を露出させ嵩上げする方法は手間がかゝるため、、受枠の内壁側に蓋板担持部を有する円筒部と地下構築物との取付部の台座部に分割製作して円筒部と台座部を内壁側で連結するよう構成し、嵩上時には円筒部のみを上方に持ち上げ、円筒部と台座部間に嵩上用スペーサを挿入するマンホール蓋受枠が特開平９−１１１７８９号、同９−１２５４３０号で提案されており、さらには受枠の円筒部を２重にして制水弁筐に見られる如く螺合するよう構成し高さを調節できるようにしたもの、外筒の内壁面に設けた階段状の段部に、内筒の外側壁面または下端を階段状の縁部を設けて高さを調節できるようにしたマンホールの蓋が実公昭６０−２０６６８号、実開昭６２−１１０３５０号などで提案されている。
【０００５】
【発明が解決しようとする課題】
以上述べた如く、道路などの舗装の補修による地表面の高さの変化に対応するため受枠の嵩上げ方法が種々提案され実施されて来たが、受枠を露出させ嵩上げする方法は手間のかゝることであり、円筒部と台座部を分離製作する方法も円筒部の引き上げには機械装置が必要であるなど面倒なことである。
【０００６】
また、嵩上時複数枚の座金を挿入した場合、受枠の座金挿入部と座金間が完全に密着せず、時間の経過と共に密着し受枠にがたつきやボルト，ナットが緩むなどの欠点があった。
本発明は、道路などの舗装の修理により地表面の高さの変化に容易に対応出来、特に機械装置を使用せずに嵩上げ高さを調節でき、がたつきの生じない蓋板の受枠を提供するを目的とする。
【０００７】
【課題を解決するための手段】
上記目的を達成するために、本発明の蓋板の受枠においては、受枠の内壁上端部に蓋板の担持部を有する円筒状の内枠と地下構築物の地上開口部に取付けるための据付部の上方に円筒状の内枠が嵌合する円筒部を有する外枠とよりなり、内枠の円形をなす下端面を３等分した位置に逆台形状の脚片を垂設し、外枠の内壁下縁の内周を３等分する位置の内壁面に脚片受を張設して内枠の３つの脚片がそれぞれ嵌合し傾斜面で内枠を支えるようにし、上方に拡開した相対する傾斜片を有し内枠の脚片と外枠の脚片受間に装着される嵩上用の座金を挿入出来るよう構成せるものである。
【０００８】
なお、この場合内枠の脚片は台形状の傾斜する相対する２つの側辺面で支えられるよう構成すればよいので台形状の脚片の中間部を省略成型するも差支えなく、嵩上用の座金の厚さ、特に傾斜する傾斜辺の厚さにより嵩上げの高さが決められるが、薄い厚さの座金を複数枚重ねるも厚さの異なる座金を用いるも差支えない。
【０００９】
また、外枠の内壁面の内周とほぼ等しい長さの外周を持つ環状体の上端面に、両側面が内枠の脚片の傾斜角度に等しい角度の傾斜面を有する脚片受を、上端面の円周を３分割した位置に脚片受の上端の間隙を脚片の基部の幅と一致させたものより順次一定の艮さで狭くなるように脚片受を隆設して支持環となして外枠の内壁下端に棚設した支持棚で担持し回動可能に装着し、内枠の脚片と支持環の脚片受の嵌合位置を変えることにより嵩上げ高さを変えることが出来るようにし解決せるものである。
【００１０】
なお、外枠の内壁下端の内周を、または支持棚を棚状に周設せる場合は支持棚の内周を３等分する位置にボルト挿通孔を穿設した連結棚を棚設し、内枠の内壁下端部の前面側には前面側より嵌挿できるボルト挿通溝を形成すると共に、外枠の連結棚のポルト挿通孔の上面にボルト頭が嵌合する窪みを設け、ボルト，ナットで内枠と外枠を連結する。
また、連結棚は内枠の脚片垂設部、外枠の脚片受張設部のそれぞれ内壁面に設けるとよく、内枠の連結棚のボルト挿通孔上面にもボルト頭が嵌合する窪みを形成させるとよい。
【００１１】
【発明の実施の形態】
発明の実施の形態を実施例にもとづき図面を参照して説明する。
〔実施例１〕 図１，２および３に示す実施例の蓋板(1)の受枠(2)は、内壁上端部に円盤状の蓋板(1)が嵌合し担持する円筒状の内枠(3)と、地下構築物の地上開口部に設置するための据付部と前記内枠(3)が嵌合する円筒部を有する外枠(4)とよりなり、内枠(3)は内枠(3)の下端面を３等分する位置に相対する２つの側辺面(11),(11)の傾斜角度が等しく下方に向って先細となった逆台形状の脚片(5)が垂設され、外枠(4)の内壁下端の内壁面を３等分する位置に内枠(3)の脚片(5)の側辺面(11),(11)と同じ傾斜角度を有する傾斜面(12),(12)を形成した脚片受(6),(6)を張設し、内枠(3)を外枠(4)に嵌合したとき内枠(3)の脚片(5)の相対する側辺面(11),(11)と外枠(4)の脚片受(6),(6)の傾斜面(12),(12)が接し内枠(3)を支えるよう構成する。
【００１２】
さらに、図２，３に示す如く、内枠(3)の脚片(5)垂設部の内壁下縁となる位置と外枠(4)の脚片受(6),(6)の中央部の内壁下縁となる位置にそれぞれボルト挿通孔を穿設した連結棚(7),(8)が棚設され、内枠(3)の連結棚(7)のボルト挿通孔は前面側よりボルト軸が嵌挿できるボルト挿通溝(9)とし、外枠(4)の連結棚(8)のボルト挿通孔(10)の上面にはボルト頭は嵌合する六角形状の窪み(13)を設ける。なお、内枠(3)の連結棚(7)と外枠(4)の連結棚(8)は内枠(3)を外枠(4)に嵌合したとき内枠(3)の脚片(5)の高さだけ間隙が生ずるようにし、内枠(3)のボルト挿通溝(9)の上面開口部のボルト取付位置にボルト頭(19)が嵌合する窪みを設ける。
【００１３】
図４に示す如く嵩上用の座金(14)は、上面より見たとき内枠(3)の内壁面の曲面に等しい扇形をなし、かつ、上方に拡開した溝状で、相対する傾斜片(15),(15)の傾斜角度は内枠(3)の脚片(5)の側辺面(11),(11)の傾斜角度と等しくなるよう形成し、内枠(3)の脚片(5)の外枠(4)の脚片受(6),(6)との接触面に被着できるよう構成し、必要に応じ傾斜片(15),(15)の厚さの異なる座金(14)を用意する。
【００１４】
図５(a)は嵩上前の内枠(3)と外枠(4)の連結部の状態を示すもので、嵩上げに当っては図５(b)に示す如くボルト(17)、ナット(18)を取外したのち、ボルト(17)ナット(18)を螺合しボルト頭(19)を外枠(4)の連結棚(8)のボルト挿通孔(10)の上面の窪み(13)に嵌合しボルト軸を内枠(3)のボルト挿通溝(9)に前側より挿入しボルト(17)を逆さに立てたのち、ナット(18)を回転させることにより内枠(3)は所要の高さまで持上げられ、内枠(3)の脚片(5)と外枠(4)の脚片受(6),(6)間に座金(14)を挿入後、ボルト(17)、ナット(18)を取外し、再び図５(a)の如く連結し、嵩上げ作業は完了する。
【００１５】
〔実施例２〕図６，７に示す実施例の蓋体の受枠は、実施例１とは外枠の構成が異なり座金を用いずに嵩上げするものである。すなわち、内枠(21)は図６(a)に示す如く実施例１と同様に外枠(22)に嵌合する内壁上部に蓋板担持部を有する円筒形をなし下端面の円周を３等分した位置に先細とした逆台形状の脚片(23)が垂設される。
【００１６】
外枠(22)は、図６(b)に示す如く、内枠(21)が嵌挿され内接する円筒部とその下端に地下構築物の地上開口部に取付けられるための据付部(24)を有し、内壁下端に内方に向って支持棚(7)が棚設され、図６(b)および図７に示す如く内壁面の内周とほゞ等しい外周を持ち上端面の円周を３分割した位置に両辺が内枠(21)に垂設された脚片(23)の傾斜する両辺と同じ傾斜角度を有する台形状の脚片受(27),(27)…を脚片受(27)と脚片受(27)の頂部間の間隙を内枠(21)の脚片(23)の台形状の基部の幅(a)と一致させ順次一定長さ(b)だけ狭くし、内枠(21)の脚片(23)が嵌合したとき内枠(21)が順次高くなるよう隆設した支持環(26)が支持棚(25)に担持され回転可能となるよう装着される。
【００１７】
なお、内枠(21)の下縁および外枠(22)の支持棚(25)には実施例１同様の連結棚(7)および(8)がそれぞれ内周を３等分した位置に棚設され、内枠(21)と外枠(22)はボルト，ナットで連結するよう構成する。なお、外枠(22)の連結棚(8)が支持棚(25)の幅よりも厚くなるときは支持環(26)の回動を考慮し棚設する。
【００１８】
【発明の効果】
本発明は、以上説明したように構成されているので、以下に記載されるような効果を有する。
内枠は３つの脚片で支持され、かつ、ボルト，ナットで外枠と一連結されているのでがたつく恐れがない。
嵩上げに際し、連結しているボルト，ナットを取り外し、取り外したボルト，ナットをジャッキ代りとして内枠を所要の高さに持ち上げることができるので、機械装置は不要である。
内枠は逆台形状の脚片の相対する傾斜する側辺面を外枠の脚片受の２つの傾斜面が接触し支えており、その間に座金が挿入されたときも同様傾斜面で支えられるよう構成されているのでなじみがよく時間の経過ど共にがたつく恐れもない。
【図面の簡単な説明】
【図１】 蓋板の一部を切欠く平面図。
【図２】 図１のＡ−Ａ線部における、(a)内枠の部分拡大正面図、(b)外枠の部分拡大正面図。
【図３】 図１のＢ−Ｂ線部における、(a)内枠の部分拡大断面図、(b)外枠の部分拡大断面図。
【図４】嵩上用の座金の、(a)正面図、(b)平面図。
【図５】嵩上げ作業を示す連結部の概略断面図。
【図６】他の実施例の、(a)内枠の断面図、(b)外枠の断面図。
【図７】図６の外枠の平面図。
【符号の説明】
１ 蓋板
２ 受枠
３，２１ 内枠
４，２２ 外枠
５，２３ 脚片
６，２４ 脚片受
７，８ 連結棚
９ ボルト挿通溝
１０ ボルト挿通孔
１１ 側片面
１２ 傾斜面
１３ 窪み
１４ 座金
１５ 傾斜片
１６ 底辺
１７ ボルト
１８ ナット
１９ ボルト頭
２５ 支持棚
２６ 支持環[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a receiving frame for a cover plate provided in a ground opening of an underground structure provided on a road or the like, and in particular, an underground structure having a height adjusting mechanism for matching a disk-shaped cover plate surface with the ground surface. It is related with the receiving frame of the cover plate for a motor.
[0002]
[Prior art]
Conventionally, manholes for inspection of sewers provided on roads, fire hydrant cases provided in waterworks, water control valves, and grounds provided at cable branch points for electricity, communications, etc. buried underground A cast iron-covered disc-shaped lid and its receiving frame are attached to the ground opening of an underground structure such as an inner box so that the lid plate surface coincides with the ground surface.
[0003]
The receiving frame of the cover plate for underground structures constructed in this way may cause a step between the cover plate surface and the ground surface for road pavement repair, etc., so that the cover plate surface matches the ground surface. It is necessary to raise the volume. In this case, a method of adjusting the height by inserting a flat washer between the receiving frame and the underground structure by exposing the periphery of the receiving frame is taken, and many proposals regarding the shape and insertion method of the flat washer can be seen. .
[0004]
Since the method of exposing and raising such a receiving frame is time-consuming, the cylindrical portion having a cylindrical portion having a cover plate carrying portion on the inner wall side of the receiving frame and a pedestal portion of the mounting portion of the underground structure are manufactured separately. A manhole cover receiving frame configured to connect the pedestal portion on the inner wall side, lift only the cylindrical portion upward when it is raised, and insert a raising spacer between the cylindrical portion and the pedestal portion is disclosed in JP-A Nos. 9-11789 and 9 -125430, and the cylindrical part of the receiving frame is doubled so that it can be screwed as seen in the water control valve housing so that the height can be adjusted, on the inner wall surface of the outer cylinder The manhole cover, which is provided with a stepped edge on the outer wall surface or lower end of the inner cylinder on the provided stepped stepped portion, can be adjusted in height, as shown in Japanese Utility Model Publication Nos. 60-20668 and 62110350. It is proposed in the issue.
[0005]
[Problems to be solved by the invention]
As described above, various methods for raising the receiving frame have been proposed and implemented in order to cope with changes in the height of the ground surface due to repair of pavements such as roads. However, the method for raising the exposed frame by exposing the receiving frame is troublesome. Therefore, the method of separately manufacturing the cylindrical portion and the pedestal portion is also troublesome because a mechanical device is required for lifting the cylindrical portion.
[0006]
Also, when multiple washers are inserted when bulking up, the washer insertion part of the receiving frame and the washer are not completely in close contact with each other, and there are drawbacks such as looseness of the receiving frame and loosening of bolts and nuts over time. there were.
The present invention provides a cover frame for a cover plate that can easily cope with changes in the height of the ground surface by repairing pavements such as roads, and can adjust the raised height without using a mechanical device, and does not cause rattling. The purpose is to do.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, in the receiving frame of the lid plate of the present invention, there is provided a cylindrical inner frame having a supporting portion of the lid plate at the upper end of the inner wall of the receiving frame and an installation portion for attaching to the ground opening of the underground structure. An outer frame having a cylindrical portion into which a cylindrical inner frame fits is formed. An inverted trapezoidal leg piece is vertically suspended at a position obtained by dividing the lower end surface of the inner frame into three equal parts. A leg holder is stretched on the inner wall surface at a position that divides the inner circumference of the lower edge of the inner wall into three equal parts so that the three leg pieces of the inner frame are fitted to support the inner frame on the inclined surface, and expands upward. Thus, the structure is constructed so that a bulky washer can be inserted between the leg pieces of the inner frame and the leg piece holders of the outer frame.
[0008]
In this case, the leg pieces of the inner frame may be configured to be supported by two opposite side surfaces of the trapezoidal shape. The height of the raising is determined by the thickness of the washer, particularly the thickness of the inclined side inclined, but it is possible to stack a plurality of thin washers or use washers with different thicknesses.
[0009]
Further, on the upper end surface of the annular body having an outer circumference with a length substantially equal to the inner circumference of the inner wall surface of the outer frame, a leg piece holder having an inclined surface whose both side surfaces are equal to the inclination angle of the leg pieces of the inner frame, The leg piece holder is raised and supported so that the gap between the upper edge of the leg piece holder and the width of the base part of the leg piece is made to be narrow at a certain length in order by dividing the circumference of the upper end surface into three parts. As a ring, it is supported by a support shelf shelved on the lower end of the inner wall of the outer frame and mounted rotatably, and the raised height is changed by changing the fitting position of the leg piece of the inner frame and the leg piece holder of the support ring It can be done and solved .
[0010]
Incidentally, the inner circumference of the inner wall the lower end of the outer frame or supporting shelves Tana設connecting shelf bored bolt insertion holes at positions 3 equally divided inner circumference of the support shelf when to circumferentially on shelf, together on the front side of the inner wall the lower end portion of the inner frame forming a bolt insertion groove that can fitted from the front side, the recess upper surface to the bolt head Porto insertion hole of the connection shelf of the outer frame fits provided, bolts, nuts Connect the inner and outer frames with.
Also, leg vertical portion of the connection shelf inner frame may be provided on each inner wall surface of the leg受張portion of the outer frame, the inner frame bolt head to bolt insertion hole upper surface of the connecting shelf is fitted A depression may be formed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples with reference to the drawings.
[Embodiment 1] The receiving frame (2) of the lid plate (1) of the embodiment shown in FIGS. 1, 2, and 3 is a cylindrical inner plate that is fitted and supported by a disc-like lid plate (1) at the upper end of the inner wall. The frame (3) is composed of an outer frame (4) having a cylindrical portion to which the inner frame (3) is fitted and an installation part for installation at the ground opening of the underground structure. Inverted trapezoidal leg pieces (5) with the inclination angles of the two side faces (11) and (11) facing the position that divides the lower end face of the frame (3) into three equal parts, and tapering downward. Has the same inclination angle as the side surfaces (11) and (11) of the leg pieces (5) of the inner frame (3) at a position that divides the inner wall surface at the lower end of the inner wall of the outer frame (4) into three equal parts. When the leg pieces (6), (6) forming the inclined surfaces (12), (12) are stretched and the inner frame (3) is fitted to the outer frame (4), the inner frame (3) The opposite side surfaces (11), (11) of the leg piece (5) and the leg piece supports (6), (6) of the outer frame (4) are in contact with the inclined surfaces (12), (12) to contact the inner frame ( Configure to support 3).
[0012]
Further, as shown in FIGS. 2 and 3, the position of the leg piece (5) of the inner frame (3) as the lower edge of the inner wall of the hanging portion and the center of the leg piece supports (6) and (6) of the outer frame (4) The connecting shelves (7) and (8) with bolt insertion holes drilled at the position that becomes the lower edge of the inner wall of the part are shelved, and the bolt insertion holes of the inner shelf (3) connecting shelf (7) are from the front side. A bolt insertion groove (9) into which the bolt shaft can be inserted, and a hexagonal recess (13) into which the bolt head fits on the upper surface of the bolt insertion hole (10) of the connection shelf (8) of the outer frame (4). Provide. Note that the connecting shelf (7) of the inner frame (3) and the connecting shelf (8) of the outer frame (4) are the leg pieces of the inner frame (3) when the inner frame (3) is fitted to the outer frame (4). A gap is formed by the height of (5), and a recess for fitting the bolt head (19) is provided at the bolt mounting position of the upper surface opening of the bolt insertion groove (9) of the inner frame (3).
[0013]
As shown in FIG. 4, the washer (14) for raising is formed in a sector shape equal to the curved surface of the inner wall surface of the inner frame (3) when viewed from the upper surface, and has a groove shape that expands upward, and is opposed to each other. The inclination angle of the pieces (15), (15) is formed to be equal to the inclination angle of the side faces (11), (11) of the leg pieces (5) of the inner frame (3), and the inner frame (3) The leg piece (5) is configured to be attached to the contact surface of the outer frame (4) with the leg piece holder (6), (6), and if necessary, the thickness of the inclined pieces (15), (15) Prepare different washers (14).
[0014]
FIG. 5 (a) shows the state of the connecting portion of the inner frame (3) and the outer frame (4) before raising, and when raising the bolt, the bolt (17) and nut as shown in FIG. 5 (b). After removing (18), the bolt (17) and nut (18) are screwed together, and the bolt head (19) is recessed in the upper surface of the bolt insertion hole (10) of the connection shelf (8) of the outer frame (4) (13 ), The bolt shaft is inserted into the bolt insertion groove (9) of the inner frame (3) from the front side, the bolt (17) is upside down, and then the nut (18) is rotated to rotate the inner frame (3) Is lifted to the required height, and after inserting the washer (14) between the leg pieces (5) of the inner frame (3) and the leg pieces (6), (6) of the outer frame (4), the bolt (17) Then, the nut (18) is removed and connected again as shown in FIG. 5 (a), and the raising operation is completed.
[0015]
[Embodiment 2] The receiving frame of the lid body of the embodiment shown in FIGS. 6 and 7 differs from the embodiment 1 in that the structure of the outer frame is different and it is raised without using a washer. That is, as shown in FIG. 6 (a), the inner frame (21) is formed in a cylindrical shape having a cover plate carrying portion on the inner wall upper portion that fits into the outer frame (22) as in the first embodiment, and the circumference of the lower end surface is formed. A tapered inverted trapezoidal leg piece (23) is suspended at a position divided into three equal parts.
[0016]
As shown in FIG. 6 (b), the outer frame (22) has a cylindrical portion in which the inner frame (21) is inserted and inscribed, and a mounting portion (24) to be attached to the ground opening of the underground structure at the lower end thereof. And a support shelf (7) is erected inwardly at the lower end of the inner wall, and has an outer periphery substantially equal to the inner periphery of the inner wall surface as shown in FIG. 6 (b) and FIG. The trapezoidal leg piece holders (27), (27), etc. having the same inclination angle as the inclined sides of the leg piece (23) whose both sides are suspended from the inner frame (21) at the position divided into three The gap between the top of (27) and the leg rest (27) is matched with the width (a) of the trapezoidal base of the leg piece (23) of the inner frame (21) and is successively narrowed by a certain length (b). When the leg piece (23) of the inner frame (21) is fitted, the support ring (26) raised so that the inner frame (21) is sequentially raised is mounted on the support shelf (25) so as to be rotatable. Is done.
[0017]
In addition, on the lower edge of the inner frame (21) and the support shelf (25) of the outer frame (22), the same connection shelves (7) and (8) as in Example 1 are placed at positions where the inner circumference is divided into three equal parts. The inner frame (21) and the outer frame (22) are connected by bolts and nuts. When the connection shelf (8) of the outer frame (22) is thicker than the width of the support shelf (25), the shelf is installed in consideration of the rotation of the support ring (26).
[0018]
【The invention's effect】
Since the present invention is configured as described above, it has the following effects.
The inner frame is supported by three leg pieces and is connected to the outer frame by bolts and nuts, so there is no risk of rattling.
At the time of raising, the connected bolts and nuts are removed, and the inner frame can be lifted to a required height by using the removed bolts and nuts as a jack, so that no mechanical device is required.
The inner frame is supported by two inclined surfaces of the leg holders of the outer frame that are in contact with each other on the inclined side surfaces of the inverted trapezoidal leg piece, and is also supported by the inclined surface when a washer is inserted between them. Because it is structured to be familiar, there is no fear of shaking together over time.
[Brief description of the drawings]
FIG. 1 is a plan view in which a part of a lid plate is cut away.
2A is a partially enlarged front view of an inner frame, and FIG. 2B is a partially enlarged front view of an outer frame, taken along line AA in FIG.
3A is a partially enlarged cross-sectional view of an inner frame, and FIG. 3B is a partially enlarged cross-sectional view of an outer frame, taken along line BB in FIG. 1;
4A is a front view, and FIG. 4B is a plan view of a washer for raising.
FIG. 5 is a schematic cross-sectional view of a connecting portion showing a raising operation.
6A is a cross-sectional view of an inner frame, and FIG. 6B is a cross-sectional view of an outer frame according to another embodiment.
7 is a plan view of the outer frame of FIG. 6. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cover plate 2 Receiving frame 3,21 Inner frame 4,22 Outer frame 5,23 Leg piece 6,24 Leg piece holder 7,8 Connection shelf 9 Bolt insertion groove 10 Bolt insertion hole 11 Side surface 12 Inclined surface 13 Indentation 14 Washer 15 Inclined piece 16 Base 17 Bolt 18 Nut 19 Bolt head 25 Support shelf 26 Support ring
