JP7403345B2 - floor inspection port - Google Patents

floor inspection port Download PDF

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JP7403345B2
JP7403345B2 JP2020027886A JP2020027886A JP7403345B2 JP 7403345 B2 JP7403345 B2 JP 7403345B2 JP 2020027886 A JP2020027886 A JP 2020027886A JP 2020027886 A JP2020027886 A JP 2020027886A JP 7403345 B2 JP7403345 B2 JP 7403345B2
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outer frame
lid
floor
peripheral edge
lid body
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JP2021130997A (en
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徳治 来栖
徹 林
有弘 永谷
秀靖 細谷
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Naka Corp
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Description

本発明は、床点検口に関する。 The present invention relates to a floor inspection port.

近時、床点検口の改良が進み、床点検口として、特許文献１に示すように、外枠の内面及び蓋体の側面を、それぞれ所要の異なる角度で、下方に向かうに従って外枠の開口内側方向に傾斜させるものが提案されている。これによれば、外枠の内面と蓋体の側面との間の隙間上端に対して優れた閉塞性等を得ることができる。 In recent years, improvements have been made to floor inspection ports, and as shown in Patent Document 1, the opening of the outer frame is opened at different angles on the inner surface of the outer frame and the side surface of the lid as they move downward. One that tilts inward has been proposed. According to this, it is possible to obtain excellent sealing properties for the upper end of the gap between the inner surface of the outer frame and the side surface of the lid body.

ところで、床点検口には、特許文献２に示すように、外枠とその外枠に嵌挿される蓋体とのシール性をできるだけ入口近く（外部近く）で確保するべく、外枠の内面に、主体面として起立する基本面と、該基本面の上端から該外枠の外方に向けて張り出す第１支持面と、を設ける一方で、蓋体の側面に、外枠の基本面に対向しつつ起立状態とされる基本面と、該基本面の上部から外枠の第１支持面に対向するように張り出す上部外周縁部と、を設け、その上部外周縁部と第１支持面とで弾性シール材を所定の挟持力（ボルトを用いた
押込み装置を利用）をもって挟持するようにしたものが提案されている。これによれば、弾性シール材の弾性変形に基づき、蓋体と外枠との間のシール性が、それらの上部（入口近く）において確保でき、床点検開口に水、ゴミ等が入り込むことを阻止することができる。 By the way, as shown in Patent Document 2, the floor inspection port has an inner surface of the outer frame in order to ensure sealing between the outer frame and the lid fitted into the outer frame as close to the entrance (near the outside) as possible. , while providing a basic surface that stands up as a main surface and a first support surface that projects from the upper end of the basic surface toward the outside of the outer frame, a side surface of the lid body is provided with a base surface that extends from the basic surface of the outer frame. Basic surfaces facing each other and placed in an upright state, and an upper outer peripheral edge projecting from the upper part of the basic surface to face the first support surface of the outer frame are provided, and the upper outer peripheral edge and the first support surface are provided. A device has been proposed in which the elastic sealing material is held between the surfaces with a predetermined holding force (using a pushing device using a bolt). According to this, based on the elastic deformation of the elastic sealing material, sealing performance between the lid body and the outer frame can be ensured at their upper part (near the entrance), and water, dirt, etc. can be prevented from entering the floor inspection opening. can be prevented.

特開２０１０－２６５７２２号公報Japanese Patent Application Publication No. 2010-265722 特許第３０３４４７５号公報Patent No. 3034475

しかし、上記床点検口においては、蓋体が外枠内に嵌挿されるときには、蓋体側面の基本面と外枠内面の基本面とが互いに起立状態の下で近接することになることから、比較的厚みを有する蓋体が、外枠内に多少、傾いた状態で嵌挿されたようなときには、蓋体側面の基本面と外枠内面の基本面とが噛み合うことになる。また、蓋体が外枠内に嵌挿されるに際し、蓋体側面の基本面及び外枠内面の基本面の少なくともいずれかにゴミ等が付着しているときには、蓋体側面がゴミ等を噛み込むことがある。このため、このようなときには、蓋体が設定した状態で外枠内に嵌挿されないことになり、蓋体と外枠との間に所定の挟持力を付与しても、弾性シール材が適正に弾性変形することができず、蓋体側面と外枠内面との間のシール性能が低下するおそれがある。 However, in the above-mentioned floor inspection port, when the lid is inserted into the outer frame, the basic surface of the side surface of the lid and the basic surface of the inner surface of the outer frame come close to each other in an upright state. When a relatively thick lid is inserted into the outer frame in a somewhat inclined state, the basic surface on the side surface of the lid and the basic surface on the inner surface of the outer frame will mesh with each other. In addition, when the lid body is inserted into the outer frame, if there is dust, etc. attached to at least one of the basic surface of the side surface of the lid body and the basic surface of the inner surface of the outer frame, the side surface of the lid body may catch the dust etc. Sometimes. Therefore, in such a case, the lid will not fit into the outer frame in the set state, and even if a predetermined clamping force is applied between the lid and the outer frame, the elastic sealing material will not fit properly. Therefore, the sealing performance between the side surface of the lid body and the inner surface of the outer frame may deteriorate.

本発明は、上記実情に鑑みてなされたもので、その目的は、外枠とその外枠に嵌挿される蓋体との間の上部に弾性シール材が配置されている床点検口において、そのシール性能が、外枠内への蓋体の嵌挿状態に応じて低下することを防止することにある。 The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a floor inspection port in which an elastic sealing material is disposed at the upper part between an outer frame and a lid fitted into the outer frame. The purpose is to prevent sealing performance from deteriorating depending on the state of insertion of the lid into the outer frame.

前記目的を達成するために本発明にあっては、下記（１）～（３）とした構成とされている。 In order to achieve the above object, the present invention has the following configurations (1) to (3) .

（１）床面に設けられて床下に臨む開口を区画する外枠と、該外枠内に着脱可能に嵌挿される蓋体と、が備えられている床点検口において、
前記外枠の内面に、該外枠の内面の主体をなして、上方に向かうに従って対向面間隔が拡がるように傾斜される基本面と、該基本面の上端から該外枠の外方に向けて張り出す第１支持面と、が備えられ、
前記蓋体の側面に、前記外枠の基本面に対向しつつ下方に向かうに従って該外枠の基本面との間隔が拡がるように傾斜される傾斜面と、該傾斜面の上部に該蓋体の拡張方向に張り出すように設けられて前記外枠の前記第１支持面に対向する上部外周縁部と、が備えられ、
前記蓋体の該上部外周縁部に弾性シール材が保持され、
前記蓋体の上部外周縁部が、前記傾斜面の上端から上方に起立する内側側部を備え、
前記蓋体は、該蓋体が前記外枠内に嵌挿されたとき、該蓋体における傾斜面と内側側部とがなす角部が、該外枠における第１支持面よりも下方に位置されるように形成されている構成とされている。 (1) A floor inspection port that is provided with an outer frame that is provided on the floor surface and partitions an opening that looks under the floor, and a lid that is removably inserted into the outer frame,
The inner surface of the outer frame has a basic surface that forms the main part of the inner surface of the outer frame and is inclined so that the distance between opposing surfaces increases as you go upward, and a basic surface that extends from the upper end of the basic surface toward the outside of the outer frame. a first support surface extending from the top;
A sloped surface that faces the basic surface of the outer frame and is inclined so that the distance from the basic surface of the outer frame increases as it goes downward, on a side surface of the lid; an upper outer peripheral edge portion extending in the expansion direction of the outer frame and facing the first support surface of the outer frame;
an elastic sealing material is held at the upper outer peripheral edge of the lid ;
The upper outer peripheral edge of the lid includes an inner side portion that stands upward from the upper end of the inclined surface,
The lid is configured such that when the lid is inserted into the outer frame, a corner formed by an inclined surface and an inner side portion of the lid is located below a first support surface of the outer frame. The configuration is such that the

この構成によれば、蓋体の傾斜面が、外枠内面の基本面（傾斜面）に対向しつつ下方に向かうに従って外枠の基本面との間隔が拡がるように傾斜されることから、蓋体を外枠内に嵌挿するときには、蓋体側面の傾斜面が外枠内面の基本面に噛み合うことも、蓋体がゴミ等を噛み込むこともなくなり、蓋体を設定した状態で外枠内に的確に嵌挿することができる。 According to this configuration, the sloped surface of the lid faces the basic surface (sloped surface) of the inner surface of the outer frame and is sloped so that the distance from the basic surface of the outer frame increases as it goes downward. When inserting the body into the outer frame, the sloped surface of the side surface of the lid body will not engage with the basic surface of the inner surface of the outer frame, and the lid body will not get caught in dust, etc., and the lid body will not fit into the outer frame. It can be inserted accurately into the inside.

また、この構成によれば、外枠内に蓋体を正規の状態で嵌挿し易くすることができると共に、その外枠内に蓋体を嵌挿するに際して、蓋体における上部外周縁部の弾性シール材を、第1支持面に的確に当接させることができ、外枠内上部と蓋体の上部外周縁部との間のシール性能を的確に確保できる。Further, according to this configuration, it is possible to easily fit the lid body into the outer frame in a normal state, and when the lid body is inserted into the outer frame, the elasticity of the upper outer peripheral edge of the lid body The sealing material can be accurately brought into contact with the first support surface, and the sealing performance between the inner upper part of the outer frame and the upper outer peripheral edge of the lid body can be accurately ensured.

（２）前記（１）の構成の下で、
前記蓋体の上部外周縁部が、前記内側側部と、該内側側部の上端から前記蓋体の拡張方向に水平方向に張り出す張り出し部と、該張り出し部の張り出し端から下方に垂下する外側側部とにより、下方に開口した溝形状に形成され、
前記上部外周縁部の溝形状内に前記弾性シール材が収納保持されている構成とされている。 (2) Under the configuration of (1) above ,
The upper outer peripheral edge of the lid body includes the inner side part , an overhang part that extends horizontally from the upper end of the inner side part in an expansion direction of the lid body, and hangs downward from the overhang end of the overhang part. The outer side part is formed into a downwardly opening groove shape,
The elastic sealing material is housed and held within the groove shape of the upper outer peripheral edge.

この構成によれば、蓋体の上部外周縁部下面に弾性シール材を保持して、蓋体の上部外周縁部下面と外枠の第１支持面とにより弾性シール材を的確に弾性変形させることができ、外枠内上部と蓋体の上部外周縁部との間のシール性能を確実に一定に保つことができる。 According to this configuration, the elastic sealing material is held on the lower surface of the upper outer peripheral edge of the lid body, and the elastic sealing material is accurately elastically deformed by the lower surface of the upper outer peripheral edge of the lid body and the first support surface of the outer frame. This makes it possible to reliably maintain a constant sealing performance between the inner upper part of the outer frame and the upper outer peripheral edge of the lid.

（３）前記（１）又は（２）の構成の下で、
前記外枠の内面に、該外枠の基本面の下端から該外枠の内方に向けて張り出す第２支持面が備えられ、
前記第１支持面と前記蓋体の上部外周縁部とにより前記弾性シール材が弾性変形され、
前記蓋体の下面が、前記外枠の第２支持面に当接するように形成されている構成とされている。 (3) Under the configuration of (1) or (2) above,
The inner surface of the outer frame is provided with a second support surface that extends inward from the lower end of the basic surface of the outer frame,
the elastic sealing material is elastically deformed by the first support surface and the upper outer peripheral edge of the lid;
The lower surface of the lid body is configured to be in contact with a second support surface of the outer frame .

この構成によれば、蓋体が正規の状態で外枠内に嵌挿される状況の下で、第１支持面と蓋体の上部外周縁部とにより弾性シール材が弾性変形され、しかもそのとき、蓋体の下面が外枠の第２支持面に当接されていることから、蓋体が下方に所定変位量だけ変位動して弾性シール材を弾性変形させた後、その蓋体が第２支持面により受止められることになり、弾性シール材に、蓋体側からの荷重のうち、所定荷重を作用させて、弾性シール材の弾性変形を一定にすることができる。このため、蓋体と外枠との間のシール性能を一定の状態に維持できる。According to this configuration, when the lid is fitted into the outer frame in a normal state, the elastic sealing material is elastically deformed by the first support surface and the upper outer peripheral edge of the lid; Since the lower surface of the lid body is in contact with the second support surface of the outer frame, after the lid body is displaced downward by a predetermined amount and elastically deforms the elastic sealing material, the lid body is moved to the second support surface of the outer frame. By applying a predetermined load of the load from the lid side to the elastic sealing material, the elastic deformation of the elastic sealing material can be made constant. Therefore, the sealing performance between the lid and the outer frame can be maintained in a constant state.

本発明によれば、外枠とその外枠に嵌挿される蓋体との間の上部に弾性シール材が配置されている床点検口において、そのシール性能が、外枠内への蓋体の嵌挿状態によって低下することを防止できる。 According to the present invention, in a floor inspection port in which an elastic sealing material is disposed at the upper part between an outer frame and a lid fitted into the outer frame, the sealing performance of the elastic sealing material is determined by the sealing performance of the elastic sealing material. It is possible to prevent deterioration due to the inserted state.

第１実施形態に係る床点検口において、外枠の開口を蓋体が閉じている状態を示す斜視図。FIG. 3 is a perspective view showing a state in which a lid closes an opening of an outer frame in the floor inspection port according to the first embodiment. 第１実施形態に係る床点検口において、ハンドルを用いて蓋体を持ち上げることにより外枠の開口を開いた状態にしたことを示す斜視図。FIG. 2 is a perspective view showing the floor inspection port according to the first embodiment in which the opening of the outer frame is opened by lifting the lid using the handle. 第１実施形態に係る床点検口を示す部分縦断面図。FIG. 3 is a partial vertical sectional view showing the floor inspection port according to the first embodiment. 図３の部分拡大図。A partially enlarged view of FIG. 3. 第１実施形態に係る外枠の取付けを説明する説明図。FIG. 3 is an explanatory diagram illustrating attachment of the outer frame according to the first embodiment. 第１実施形態に係る外枠が設置位置（コンクリート基盤）に取付けられた状態を示す斜視図。FIG. 2 is a perspective view showing a state in which the outer frame according to the first embodiment is attached to an installation position (concrete base). 第１実施形態に係る外枠が、固定片及びアンカーボルトを介してコンクリート基盤に取付けられている状態（床仕上げ材料としてのモルタル充填前）を示す拡大断面図。FIG. 2 is an enlarged sectional view showing a state in which the outer frame according to the first embodiment is attached to a concrete base via fixing pieces and anchor bolts (before filling with mortar as a floor finishing material). 図７の状態から、外枠の周囲に床仕上げ材料としてのモルタルを充填した状態に移行したことを説明する状態説明図。FIG. 8 is a state explanatory diagram illustrating a transition from the state shown in FIG. 7 to a state in which mortar as a floor finishing material is filled around the outer frame. 外枠の各外枠構成材の伸び方向中央部が固定片を介してコンクリート基盤に固定されていない場合において、その外枠の周囲に床仕上げ材料としてのモルタルを充填したときに、各外枠構成材が撓むことを説明する説明図。In cases where the center part of each outer frame component in the stretching direction is not fixed to the concrete base via a fixing piece, when mortar as a floor finishing material is filled around the outer frame, each outer frame FIG. 3 is an explanatory diagram illustrating how the constituent materials bend. 第２実施形態を説明する説明図。Explanatory diagram explaining the second embodiment. 第３実施形態に係る床点検口を示す部分縦断面図。FIG. 7 is a partial vertical sectional view showing a floor inspection port according to a third embodiment. 外枠の周囲に床仕上げ材料としてのモルタルを充填した状態に移行したことを説明する状態説明図。FIG. 3 is an explanatory diagram illustrating a state in which the outer frame has been filled with mortar as a floor finishing material. 第３実施形態に係る外枠に対する高さ及び姿勢の調整を平面的に説明する説明図。FIG. 7 is an explanatory diagram for explaining, in a plan view, adjustment of the height and posture with respect to the outer frame according to the third embodiment. 図１３の縦断面図。FIG. 14 is a vertical cross-sectional view of FIG. 13.

以下、本発明の実施形態を図面に基づいて説明する。 Embodiments of the present invention will be described below based on the drawings.

図１、図２において、符号１は、床面２に設置された床点検口を示す。この床点検口１には、建造物・構造物の床面２に配置固定される外枠３と、その外枠３内に対して着脱可能に嵌挿される蓋体４とが備えられている。外枠３は、床下開口５に臨む点検開口として正方形状（四角形状）の開口６を区画することになり、蓋体４は、その外枠３の開口６に応じて正方形状の板状体として形成されている。この場合、蓋体４については、その上面にハンドル用の２つのねじ込み穴７が設けられており、その各ねじ込み穴７にハンドル８をねじ込んで、その両ハンドル８をもって蓋体４を移動操作（開閉操作）することにより、外枠３の開口６が開閉される（図２参照）。尚、各ねじ込み穴７は、平常時において、その各ねじ込み穴７に例えばねじ込み蓋材を螺合することにより閉止される。 In FIGS. 1 and 2, reference numeral 1 indicates a floor inspection hole installed on the floor surface 2. As shown in FIG. This floor inspection port 1 is equipped with an outer frame 3 that is placed and fixed on the floor surface 2 of a building/structure, and a lid body 4 that is removably inserted into the outer frame 3. . The outer frame 3 defines a square-shaped (quadrangular) opening 6 as an inspection opening facing the under-floor opening 5, and the lid body 4 has a square plate-shaped body corresponding to the opening 6 of the outer frame 3. It is formed as. In this case, the top surface of the lid 4 is provided with two screw holes 7 for handles, and a handle 8 is screwed into each of the screw holes 7, and the lid 4 is moved using both handles 8. By performing the opening/closing operation), the opening 6 of the outer frame 3 is opened/closed (see FIG. 2). Note that each screw hole 7 is closed during normal times by, for example, screwing a screw lid member into each screw hole 7.

前記外枠３は、図１、図２、図５、図６に示すように、４つの外枠構成材９を用いて構成されている。この４つの各外枠構成材９には、所定幅で一定長さ（外枠３の一辺長さ）を有するアルミ押出形材などが用いられており、それらを互いに連結することにより、外枠３は、正方形状の前記開口６を内部に区画する枠体を形成している。 The outer frame 3 is constructed using four outer frame constituent members 9, as shown in FIGS. 1, 2, 5, and 6. These four outer frame constituent members 9 are made of extruded aluminum or the like having a predetermined width and a constant length (one side length of the outer frame 3), and by connecting them to each other, the outer frame 3 forms a frame that partitions the square opening 6 therein.

前記外枠３の４つの各外枠構成材９は、図２、図３、図５、図６に示すように、外枠３の４つの各側壁部１０を構成する。各側壁部１０は、各外枠構成材９の板面を外枠３の側方に向けることにより形成されており、その各側壁部１０には、側壁部１０の主体をなす傾斜壁部１１と、その傾斜壁部１１の上部に連続して設けられる上部構成部１２と、その傾斜壁部１１の下部に連続して設けられる下部構成部１３と、が備えられている。傾斜壁部１１の少なくとも内面１１ａ（外枠３内面の基本面）は、外枠３の上部と下部との間において、上方に向かうに従って外枠３の開口６が拡がるように傾斜されており、その傾斜角度は、起立状態（後述の底板部３０に対して直角となる状態）にあるとした場合の方向を基準(線)として、θ１とされている(図４参照)。 The four outer frame constituent members 9 of the outer frame 3 constitute four side walls 10 of the outer frame 3, as shown in FIGS. 2, 3, 5, and 6. Each side wall portion 10 is formed by orienting the plate surface of each outer frame component 9 to the side of the outer frame 3, and each side wall portion 10 has an inclined wall portion 11 that forms the main body of the side wall portion 10. , an upper component part 12 provided continuously on the upper part of the inclined wall part 11 , and a lower part constituent part 13 provided continuously in the lower part of the inclined wall part 11 . At least the inner surface 11a (the basic surface of the inner surface of the outer frame 3) of the inclined wall portion 11 is inclined so that the opening 6 of the outer frame 3 widens upwardly between the upper and lower parts of the outer frame 3, The angle of inclination is set to θ1 with reference to the direction (line) in the case of being in an upright state (a state perpendicular to the bottom plate portion 30, which will be described later) (see FIG. 4).

上部構成部１２には、図３に示すように、傾斜壁部１１上端から外枠３外方（側方）に向けて張り出す第１支持部１４と、その第１支持部１４先端から起立する起立壁部１５と、起立壁部１５の上端からさらに外枠３外方に張り出す張り出し部１６と、その張り出し部１６の先端部から下方に垂下する垂下部１７と、が備えられている。第１支持部１４は、その上面１４ａ（第１支持面）が蓋体４の上部外周縁部（後述の環状溝部３２）及び後述のパッキング材３３を介して作用する蓋体４の荷重を受止める役割を果たし、第１支持部１４、起立部１５、張り出し部１６及び垂下部１７は、協働して、外枠３の上部強度を補強する役割を果たす。 As shown in FIG. 3, the upper component part 12 includes a first support part 14 that extends from the upper end of the inclined wall part 11 toward the outside (side) of the outer frame 3, and a first support part 14 that extends from the tip of the first support part 14. It is provided with an upright wall section 15, an overhanging section 16 that extends further outward from the outer frame 3 from the upper end of the upright wall section 15, and a hanging section 17 that hangs downward from the tip of the overhanging section 16. . The first support portion 14 has an upper surface 14a (first support surface) that receives the load of the lid 4 acting through the upper outer peripheral edge of the lid 4 (an annular groove 32 to be described later) and a packing material 33 to be described later. The first support part 14, the upright part 15, the overhang part 16, and the hanging part 17 work together to reinforce the strength of the upper part of the outer frame 3.

下部構成部１３には、図３に示すように、傾斜壁部１１の下端から外枠３内方に向けて水平に伸びる第２支持部１８と、その第２支持部１８先端から下方に折曲される折曲部１９とが備えられている。第２支持部１８の上面１８ａ（第２支持面）は、後述のパッキング材３３が蓋体４の荷重を受けて変形することに伴い、蓋体４が下方へ移動することを所定位置で規制する役割（ストッパとしての役割）を果たす。また、第２支持部１８と折曲部１９とは、外枠３の下部強度を補強する役割を果たす。この場合、下部強度を高める観点から、折曲部１９先端からさらに第１支持部１４に対向するように新たな折曲部を設けることがより好ましいが、本実施形態においては、後述のモルタル２７（床下仕上げ材料）の充填を、内部に巣を作ることなく円滑に行う観点から、その新たな折曲部は省かれている。 As shown in FIG. 3, the lower component part 13 includes a second support part 18 extending horizontally from the lower end of the inclined wall part 11 toward the inside of the outer frame 3, and a second support part 18 that is bent downward from the tip of the second support part 18. A bending portion 19 that is bent is provided. The upper surface 18a (second support surface) of the second support part 18 prevents the lid 4 from moving downward when the packing material 33 described below deforms under the load of the lid 4 at a predetermined position. (role as a stopper). Further, the second support portion 18 and the bent portion 19 serve to reinforce the strength of the lower portion of the outer frame 3. In this case, from the viewpoint of increasing the strength of the lower part, it is more preferable to provide a new bent part from the tip of the bent part 19 so as to further oppose the first support part 14. The new bent part was omitted from the viewpoint of filling the (underfloor finishing material) smoothly without creating any nests inside.

前記外枠３の各外枠構成材９（各傾斜壁部１１）の外面には、図３～図６に示すように、その長手方向中央部において第１固定片２０Ａがそれぞれ取付けられている。各第１固定片２０Ａは、帯状形状をしており、その各第１固定片２０Ａの基端部板面が傾斜壁部１１外面に固定されている。各第１固定片２０Ａの基端部よりも先端側は、その基端部に対して折曲されて、その板面を上下方向に向けつつ（水平な状態で）傾斜壁部１１外面から遠のく方向に伸びており、その各第１固定片２０Ａの先端部には、長孔２１Ａが該第１固定片２０Ａの先端から外部に開放された状態で形成されている。尚、長孔２１Ａにかえて、丸孔、ルーズホール、切欠などが適宜利用可能である。 As shown in FIGS. 3 to 6, a first fixing piece 20A is attached to the outer surface of each outer frame component 9 (each inclined wall portion 11) of the outer frame 3 at the longitudinal center thereof. . Each first fixing piece 20A has a band-like shape, and the base end plate surface of each first fixing piece 20A is fixed to the outer surface of the inclined wall portion 11. The distal end of each first fixing piece 20A is bent with respect to the proximal end, and is moved away from the outer surface of the inclined wall portion 11 while turning the plate surface vertically (in a horizontal state). A long hole 21A is formed at the tip of each first fixing piece 20A so as to be open to the outside from the tip of the first fixing piece 20A. Note that instead of the elongated hole 21A, a round hole, a loose hole, a notch, etc. can be used as appropriate.

前記外枠３の設置位置周辺下部（床下開口５の周囲）には、図３～図６に示すように、躯体としてのコンクリート基盤２２が配置され、そのコンクリート基盤２２には、アンカー部材としての複数の第１アンカー２３Ａのねじ棒２４Ａが植設されている。コンクリート基盤２２形成時に、インサートナットを埋め込んでおき、寸切りボルト（ねじ棒２４Ａ）を螺合することで第１アンカー２３Ａをなす。各第１アンカー２３Ａは、一端部がコンクリート基盤２２にねじ込まれ他端側が上方に伸びるねじ棒２４Ａと、そのねじ棒２４Ａに螺合される一対のナット２５Ａ（連結部）と、を備える構成とされており、このような第１アンカー２３Ａは、外枠３の各外枠構成材９の側方外方であって、各外枠構成材９の長手方向中央部に対向する位置にそれぞれ設置されている。この各第１アンカー２３Ａのねじ棒２４Ａは、図７に示すように、コンクリート基盤２２上（外枠３の周囲）に床仕上げ材料としてのモルタル２７が充填される前に、各第１固定片２０Ａにおける長孔２１Ａに対してその各第１固定片２０Ａの他端開口から挿通され、その各第１固定片２０Ａが、ねじ棒２４Ａに螺合される一対のナット（連結部）２５Ａにより挟持（連結）される。これにより、外枠３が各第１固定片２０Ａ、各第１アンカー２３Ａを介してコンクリート基盤２２に固定されることになり、仮に、外枠３の各外枠構成材９が、その両端を固定端として外枠３の内方に撓もうとしても、各第１アンカー２３Ａにおける一対のナット２５Ａが各第１固定片２０Ａを挟持する挟持力が、その撓み力を引っ張り止めることになる。 As shown in FIGS. 3 to 6, a concrete base 22 serving as a frame is arranged at the lower part of the installation position of the outer frame 3 (around the underfloor opening 5), and a concrete base 22 serving as an anchor member is placed on the concrete base 22. A plurality of threaded rods 24A of the first anchors 23A are installed. When forming the concrete base 22, an insert nut is embedded and a threaded bolt (threaded rod 24A) is screwed into the first anchor 23A. Each first anchor 23A includes a threaded rod 24A with one end screwed into the concrete base 22 and the other end extending upward, and a pair of nuts 25A (connecting portion) screwed onto the threaded rod 24A. The first anchors 23A are installed on the outer side of each outer frame member 9 of the outer frame 3 at a position facing the longitudinal center of each outer frame member 9. has been done. As shown in FIG. 7, the threaded rods 24A of each of the first anchors 23A are attached to each of the first fixed pieces before mortar 27 as a floor finishing material is filled on the concrete base 22 (around the outer frame 3). Each of the first fixing pieces 20A is inserted into the elongated hole 21A in the slot 20A from the other end opening thereof, and each of the first fixing pieces 20A is held by a pair of nuts (connecting parts) 25A that are screwed onto the threaded rod 24A. (concatenated). As a result, the outer frame 3 is fixed to the concrete base 22 via each of the first fixing pieces 20A and each of the first anchors 23A. Even if the fixed ends try to bend inward of the outer frame 3, the clamping force exerted by the pair of nuts 25A in each first anchor 23A holding each first fixed piece 20A pulls and stops the bending force.

前記外枠３の外枠構成材９には、図５、図６に示すように、外枠３における四隅の各角部２６を構成する２つの外枠構成材９のいずれかにおいて第２固定片２０Ｂが取付けられている。各第２固定片２０Ｂは、その第２固定片２０Ｂが取付けられる外枠構成材９において、その外枠構成材９の長手方向中央部よりも角部２６に近い位置に位置されており、本実施形態においては、対向する一組の各外枠構成材９の両端部(両側部)に第２固定片２０Ｂが取付けられている(図５、図６参照)。この各第２固定片２０Ｂは、前記第１固定片２０Ａと同様の構成とされており、この両者２０Ａ，２０Ｂは、外枠３における各外枠構成材９に対する取付け位置だけが相違している。この各第２固定片２０Ｂについても、前記第１アンカー２３Ａと同じ構成の第２アンカー２３Ｂが用意されており、各第２アンカー２３Ｂのねじ棒２４Ｂは、各第２固定片２０Ｂに対向した状態でコンクリート基盤２２にそれぞれ植設されている。各第２固定片２０Ｂにおける他端部の長孔２１Ｂには、前記各第１アンカー２３Ａの場合と同様、コンクリート基盤２２上（外枠３の周囲）にモルタ
ル２７が充填される前に、この各第２アンカー２３Ｂのねじ棒２４Ｂが挿通され、そのような状態になった各第２固定片２０Ｂの他端部が、ねじ棒２４Ａに螺合される一対のナット２５Ｂにより挟持される(図７参照)。この場合、各ねじ棒２４Ｂに螺合される一対のナット（連結部）２５Ｂにより第２固定片２０Ｂの高さ調整が行われ、その高さ調整により、外枠３の高さ及び姿勢（勾配）調整が行われる。各第２固定片２０Ｂが外枠３の四隅に取付けられ、外枠３の高さ及び姿勢（勾配）調整を緻密に行うことができるからである。このため、前述の第１アンカー２３Ａに対する第１固定片２０Ａの連結固定については、第２固定片２０Ｂによる外枠３の高さ及び姿勢（勾配）調整を行った後に、行うことが好ましい。 As shown in FIGS. 5 and 6, the outer frame component 9 of the outer frame 3 has a second fixing member attached to one of the two outer frame components 9 constituting each of the four corners 26 of the outer frame 3. Piece 20B is attached. Each second fixing piece 20B is located closer to the corner 26 than the longitudinal center of the outer frame member 9 to which the second fixing piece 20B is attached. In the embodiment, second fixing pieces 20B are attached to both ends (both sides) of each pair of opposing outer frame members 9 (see FIGS. 5 and 6). Each of the second fixing pieces 20B has the same configuration as the first fixing piece 20A, and the only difference between these two fixing pieces 20A and 20B is the mounting position with respect to each outer frame component 9 in the outer frame 3. . Regarding each second fixing piece 20B, a second anchor 23B having the same configuration as the first anchor 23A is prepared, and the threaded rod 24B of each second anchor 23B is in a state opposite to each second fixing piece 20B. and are respectively planted on concrete foundations 22. The long hole 21B at the other end of each second fixing piece 20B is filled with mortar 27 before it is filled on the concrete base 22 (around the outer frame 3), as in the case of each first anchor 23A. The threaded rod 24B of each second anchor 23B is inserted, and the other end of each second fixing piece 20B in such a state is held by a pair of nuts 25B screwed onto the threaded rod 24A (see FIG. (see 7). In this case, the height of the second fixed piece 20B is adjusted by a pair of nuts (connecting parts) 25B screwed onto each threaded rod 24B, and the height and posture (gradient) of the outer frame 3 are adjusted by adjusting the height. ) adjustments are made. This is because each second fixing piece 20B is attached to the four corners of the outer frame 3, and the height and posture (gradient) of the outer frame 3 can be precisely adjusted. For this reason, it is preferable to connect and fix the first fixing piece 20A to the first anchor 23A described above after adjusting the height and posture (inclination) of the outer frame 3 using the second fixing piece 20B.

上述のように位置決めされた前記外枠３(図６、図７参照)の周囲には、図３に示すように床仕上げ材料としてのモルタル２７が充填されている（モルタル２７は充填後、硬化）。モルタル２７の充填には、既知の如く、型枠が用いられ、そのモルタル２７の充填により、そのモルタル２７中に、各第１、第２アンカーボルト２３Ａ，２３Ｂ、各第１、第２固定片２０Ａ，２０Ｂが埋設され、そのモルタル２７の上面が、床面２として仕上げられる。この外枠３の周囲にモルタル２７を充填するときには（モルタル２７打設時）、内部に巣ができないようにモルタル２７が押し込まれる。このため、それに基づく押圧力が外枠３に外部から内部に向けて作用することになるが、外枠３における各外枠構成材９の伸び方向中央部が、各第１固定片２０Ａ、各第１アンカー２３Ａを介してコンクリート基盤２２に固定されていることから、外枠３の各外枠構成材９が、その両端を固定端として外枠３の内方に撓もうとすることが抑制される。これに対して、第１固定片２０Ａが外枠３の各外枠構成材９に設けられていない場合（第２固定片２０Ｂだけが用いられている場合）には、図９に示すように、各外枠構成材９は、外枠３の内方に向けて撓むことになる。図９中の矢印はモルタル打設時の押圧力を示す。 The periphery of the outer frame 3 (see FIGS. 6 and 7) positioned as described above is filled with mortar 27 as a floor finishing material, as shown in FIG. ). As is known, a mold is used for filling the mortar 27, and by filling the mortar 27, each of the first and second anchor bolts 23A, 23B, and each of the first and second fixing pieces are formed in the mortar 27. 20A and 20B are buried, and the upper surface of the mortar 27 is finished as the floor surface 2. When filling the periphery of the outer frame 3 with mortar 27 (when placing the mortar 27), the mortar 27 is pushed so as not to form cavities inside. Therefore, a pressing force based on this will act on the outer frame 3 from the outside to the inside, but the central part of each outer frame component 9 in the outer frame 3 in the stretching direction Since it is fixed to the concrete base 22 via the first anchor 23A, each outer frame component member 9 of the outer frame 3 is prevented from bending inward of the outer frame 3 with both ends thereof being fixed ends. be done. On the other hand, when the first fixing piece 20A is not provided on each outer frame component 9 of the outer frame 3 (when only the second fixing piece 20B is used), as shown in FIG. , each outer frame component 9 is bent inward of the outer frame 3. The arrows in FIG. 9 indicate the pressing force when placing the mortar.

前記蓋体４は、図１～図４に示すように、箱状の内枠２８と、その内枠２８内に充填されるモルタル２９（硬化物）とにより形成されている。蓋体４をモルタル２９により適当な重量とし（例えば重さ３０ｋｇ程度）、前述のハンドル８を用いなくては外枠３の開口６を開くことができないようにすると共に、後述のパッキング材３３を圧縮変形させて、外枠３内面と蓋体４側面との間のシール性を確保するためである。 As shown in FIGS. 1 to 4, the lid body 4 is formed of a box-shaped inner frame 28 and mortar 29 (hardened material) filled in the inner frame 28. The lid body 4 is made to have an appropriate weight (for example, about 30 kg in weight) with mortar 29 so that the opening 6 of the outer frame 3 cannot be opened without using the handle 8 described above, and the packing material 33 described later is This is to ensure sealing performance between the inner surface of the outer frame 3 and the side surface of the lid body 4 by compressing and deforming it.

具体的に図３、図４により説明する。前記蓋体４の内枠２８は、底板部３０と、その底板部３０の周縁部から傾斜した状態で起立する傾斜壁部３１と、その傾斜壁部３１上端から内枠２８外方（側方）に張り出して上部外周縁部を形成する環状溝部３２と、その環状溝部３２内に収納保持される弾性シール材としてのパッキング材３３と、を備えている。底板部３０は、傾斜壁部３１と協働して、上方が開口した箱体を形成して、その内部にモルタル２９を充填することを可能にする役割を果たす。この底板部３０は、前記外枠３の第２支持部１８上にその底板部３０の下面外周縁部が載置できる程度の広さを有している。 This will be specifically explained with reference to FIGS. 3 and 4. The inner frame 28 of the lid body 4 includes a bottom plate part 30, an inclined wall part 31 that stands up in an inclined state from the peripheral edge of the bottom plate part 30, and an inner frame 28 outward (laterally) from the upper end of the inclined wall part 31. ) and an annular groove 32 that extends to form an upper outer peripheral edge, and a packing material 33 as an elastic sealing material that is housed and held within the annular groove 32. The bottom plate part 30 cooperates with the inclined wall part 31 to form a box with an open top, and plays the role of making it possible to fill the inside of the box with mortar 29. The bottom plate portion 30 has a size that allows the outer peripheral edge of the lower surface of the bottom plate portion 30 to be placed on the second support portion 18 of the outer frame 3.

傾斜壁部３１は、底板部３０の周縁部から、上方に向かうに従って内枠２８の上部開口を拡げるように傾斜（起立）されている。その傾斜角度は、起立状態（後述の底板部３０に対して直角となる状態）にあるとした場合の方向を基準(線)としてθ２とされ、そのθ２は前記外枠３の傾斜壁部１１の傾斜角度θ１よりも大きくなるように設定されている(図４においては、誇張表示)。この結果、傾斜壁部３１の外面３１ａ（蓋体４側面の傾斜面）は、外枠３における傾斜壁部１１の内面１１ａ（外枠３内面の基本面）に対向しつつ、下方に向かうに従ってその傾斜壁部内面１１ａとの間隔が拡がるように傾斜することになる。 The inclined wall portion 31 is inclined (erected) from the peripheral edge of the bottom plate portion 30 so as to widen the upper opening of the inner frame 28 as it goes upward. The angle of inclination is θ2 with reference to the direction (line) in the upright state (a state perpendicular to the bottom plate portion 30, which will be described later). (exaggerated display in FIG. 4). As a result, the outer surface 31a of the inclined wall portion 31 (the inclined surface of the side surface of the lid body 4) faces the inner surface 11a of the inclined wall portion 11 in the outer frame 3 (the basic surface of the inner surface of the outer frame 3), and as it goes downward, It is inclined so that the distance from the inner surface 11a of the inclined wall portion increases.

環状溝部３２は、傾斜壁部１１の上端から上方に起立する内側側部３４、その内側側部
３４の上端から内枠の外方に水平に張り出す張り出し部３５と、その張り出し部３５の張り出し端から下方に垂下する外側側部３６とにより構成されている。この環状溝部３２は、その構成により、下方を向く環状溝３７を形成しており、その環状溝３７の開口は、蓋体４が外枠３の開口６を閉じるときに、外枠３の第１支持部１４の上面１４ａ（第１支持面）上に臨むように設定されている(図３、図４参照)。この場合、蓋体４における傾斜壁部３１と内側側部３４とがなす角部の位置は、第１支持部１４の上面１４ａ位置（外枠３における傾斜壁部１１と第１支持部１４とがなす角部の位置）よりも低くなっている。これにより、外枠３内に蓋体４を正規の状態で嵌挿し易くすることができると共に、その外枠３内に蓋体４を嵌挿するに際して、環状溝部３２の環状溝３７内に収納保持されるパッキング材３３を、第1支持部１４上面１４ａに的確に当接させることができ、外枠３内上部と蓋体４上部外周縁部との間のシール性能を的確に確保できる。また、環状溝部３２は、各傾斜壁部３１の外反りを規制する補強部材としての役割を果たす。 The annular groove portion 32 includes an inner side portion 34 that stands upward from the upper end of the inclined wall portion 11, an overhang portion 35 that extends horizontally to the outside of the inner frame from the upper end of the inner side portion 34, and an overhang of the overhang portion 35. and an outer side portion 36 depending downwardly from the end. This annular groove part 32 forms a downwardly directed annular groove 37 due to its configuration, and when the lid body 4 closes the opening 6 of the outer frame 3, the opening of the annular groove 37 is It is set so as to face the upper surface 14a (first support surface) of the first support portion 14 (see FIGS. 3 and 4). In this case, the position of the corner formed by the sloped wall part 31 and the inner side part 34 in the lid body 4 is the position of the upper surface 14a of the first support part 14 (the position of the corner part formed by the sloped wall part 11 and the first support part 14 in the outer frame 3). (the position of the corner formed by). This makes it easy to fit the lid 4 into the outer frame 3 in a normal state, and when fitting the lid 4 into the outer frame 3, it is stored in the annular groove 37 of the annular groove 32. The held packing material 33 can be accurately brought into contact with the upper surface 14a of the first support portion 14, and the sealing performance between the inner upper part of the outer frame 3 and the upper outer peripheral edge of the lid body 4 can be accurately ensured. Further, the annular groove portion 32 serves as a reinforcing member that restricts outward curvature of each inclined wall portion 31.

パッキング材３３は、蓋体４の環状溝３７内に保持された状態で、該環状溝３７内から下方に突出している。このパッキング材３３は、蓋体４により外枠３の開口６が閉じられたときに、蓋体４と外枠３とのシール性を担保するものであり、そのときには、パッキング材３３は、外枠３の第１支持部１４の上面１４ａに当接するだけでなく、蓋体４の重量により圧縮変形される。これにより、蓋体４の上部外周縁部をなす環状溝部３２と第１支持部１４の上面１４ａとの間において、シール性が高められ、外枠３内に、水、ゴミ等が進入することが抑制される。またこのパッキング材３３の圧縮変形に伴い、蓋体４が外枠３内を下方に変位動し、その蓋体４における底板部３０の外周縁部が外枠３の第２支持部１８に当接することになっており、蓋体４は、それ以上の変位動が規制されることになっている。このため、上記パッキング材３３には、蓋体４の環状溝部３２を介して常に所定荷重（設定荷重）が作用することになり、シール性能は、一定の高い状態が維持されることになる。このとき、蓋体４の荷重（自重）を利用してパッキング材３３を圧縮変形させることから、蓋体４を外枠３内に押し込むための押し込み装置を特別に用意する必要がなくなり、構造を簡素化することができる。 The packing material 33 is held within the annular groove 37 of the lid 4 and protrudes downward from the annular groove 37. This packing material 33 ensures the sealing performance between the lid 4 and the outer frame 3 when the opening 6 of the outer frame 3 is closed by the lid 4. At that time, the packing material 33 Not only does it come into contact with the upper surface 14a of the first support part 14 of the frame 3, but it is also compressed and deformed by the weight of the lid body 4. This improves the sealing performance between the annular groove portion 32 forming the upper outer peripheral edge of the lid body 4 and the upper surface 14a of the first support portion 14, and prevents water, dirt, etc. from entering the outer frame 3. is suppressed. In addition, as the packing material 33 is compressed and deformed, the lid 4 is displaced downward within the outer frame 3, and the outer peripheral edge of the bottom plate 30 of the lid 4 comes into contact with the second support portion 18 of the outer frame 3. Further displacement of the lid body 4 is restricted. Therefore, a predetermined load (set load) is always applied to the packing material 33 via the annular groove 32 of the lid 4, and the sealing performance is maintained at a constant high level. At this time, since the packing material 33 is compressed and deformed using the load (self-weight) of the lid 4, there is no need to prepare a special pushing device for pushing the lid 4 into the outer frame 3, and the structure can be improved. It can be simplified.

またこのとき、外枠３の傾斜壁部内面１１ａの傾斜角度θ１よりも蓋体４の傾斜壁部外面３１ａの傾斜角度θ２が大きいことから、蓋体４により外枠３の開口６が閉じられるとき、蓋体４の傾斜壁部外面３１ａが外枠３の傾斜壁部内面１１ａに噛み合ったり、蓋体４がゴミ等を噛み込んだりしない。このため、蓋体４は外枠３内に正規の状態で嵌挿され、蓋体４の荷重は的確にパッキング材３３に伝達される。結果、前述のように、蓋体４は、パッキング材３３の圧縮変形に基づき第２支持部上面１８ａに当接するまで変位動し、パッキング材３３に対して所定荷重（設定荷重）が確実に作用することになる（蓋体４と外枠３との間のパッキング材３３によるシール性能が、一定の高い状態を維持）。 Also, at this time, since the inclination angle θ2 of the inclined wall outer surface 31a of the lid body 4 is larger than the inclination angle θ1 of the inclined wall inner surface 11a of the outer frame 3, the opening 6 of the outer frame 3 is closed by the lid body 4. At this time, the sloped wall outer surface 31a of the lid 4 does not engage with the sloped wall inner surface 11a of the outer frame 3, and the lid 4 does not get caught in dust or the like. Therefore, the lid 4 is fitted into the outer frame 3 in a normal state, and the load of the lid 4 is accurately transmitted to the packing material 33. As a result, as described above, the lid body 4 is displaced based on the compressive deformation of the packing material 33 until it comes into contact with the second support part upper surface 18a, and a predetermined load (set load) is reliably applied to the packing material 33. (The sealing performance of the packing material 33 between the lid body 4 and the outer frame 3 is maintained at a constant high level).

このような床点検口１は、次の手順で施工される。先ず、前述の外枠３（複数の第１、第２固定片２０Ａ，２０Ｂを備えるもの）を用意する一方で、コンクリート基盤２２に、外枠設置位置の周囲（所定位置）において、複数の第１、第２アンカー２３Ａ，２３Ｂを植設する。次に、外枠３を外枠設置位置に配置し、外枠３の各第１、第２固定片２０Ａ，２０Ｂを各第１、第２アンカー２３Ａ，２３Ｂにそれぞれ取付ける（図５参照）。この後、外枠３の周囲に床仕上げ材料としてのモルタル２７を充填し、床仕上げを行う。この場合、外枠３の開口６を開いた状態でその外枠３の周囲にモルタル２７を充填するとしても、外枠３の各外枠構成材９が第１固定片２０Ａ等により撓まないことは、前述の通りである。この床仕上げ工程を終えると、外枠３内に蓋体４を嵌挿することが可能となる。 Such a floor inspection port 1 is constructed by the following procedure. First, while preparing the aforementioned outer frame 3 (which includes a plurality of first and second fixing pieces 20A, 20B), a plurality of first and second fixing pieces are placed on the concrete base 22 around the outer frame installation position (predetermined position). 1. Plant the second anchors 23A and 23B. Next, the outer frame 3 is placed at the outer frame installation position, and the first and second fixing pieces 20A and 20B of the outer frame 3 are attached to the first and second anchors 23A and 23B, respectively (see FIG. 5). Thereafter, mortar 27 as a floor finishing material is filled around the outer frame 3 to finish the floor. In this case, even if the mortar 27 is filled around the outer frame 3 with the opening 6 of the outer frame 3 open, each outer frame component 9 of the outer frame 3 will not bend due to the first fixing pieces 20A, etc. This is as stated above. After completing this floor finishing process, it becomes possible to fit the lid 4 into the outer frame 3.

したがって、このような床点検口１においては、外枠３の各外枠構成材９の長手方向中央部がコンクリート基盤２２に第１固定片２０Ａを介して固定されていることから、外枠３の開口６が開かれた状態（蓋体４により閉められていない状態）でその周囲に床仕上げ
材料としてのモルタル２７が打設され、押圧力が各外枠構成材９の伸び方向内方側部分に作用するとしても、各外枠構成材９が外枠３の内方に向けて撓むことを抑制できる。これにより、外枠３に対する蓋体４の開閉に支障を来すことがなくなり、建築物、構造物の施工中に、外枠３の開口６を開いていても、外枠３に対する蓋体４の開閉に支障を来すという問題は生じなくなる。 Therefore, in such a floor inspection opening 1, since the longitudinal center portion of each outer frame component 9 of the outer frame 3 is fixed to the concrete base 22 via the first fixing piece 20A, the outer frame 3 Mortar 27 as a floor finishing material is placed around the opening 6 in the open state (not closed by the lid 4), and the pressing force is applied to the inner side in the direction of extension of each outer frame component 9. Even if it acts on a portion, it is possible to suppress each outer frame component member 9 from bending inward of the outer frame 3. As a result, there is no problem in opening and closing the lid 4 with respect to the outer frame 3, and even if the opening 6 of the outer frame 3 is opened during construction of a building or structure, the lid 4 with respect to the outer frame 3 This eliminates the problem of hindrance to opening and closing.

また、この床点検口１においては、外枠３の傾斜壁部内面１１ａの傾斜角度θ１よりも蓋体４の傾斜壁部外面３１ａの傾斜角度θ２が大きいことから、蓋体４により外枠３の開口６を閉じるとき、蓋体４の傾斜壁部外面３１ａと外枠３の傾斜壁部内面１１ａとの間にゴミ等を噛み込んだり、傾斜壁部外面３１ａと傾斜壁部内面１１ａとが、蓋体４の外枠３への嵌挿状態に応じて噛み合ったりすることはなくなる。このため、蓋体４を外枠３内に嵌挿するときには、その嵌挿が正規な状態となり、蓋体４の荷重がその蓋体４の環状溝部３２を介してパッキング材３３に作用し、パッキング材３３は確実に圧縮変形される。これにより、蓋体４を外枠３内に嵌挿するときには、外枠３と蓋体４との間のシール性能をいつでも的確に確保できることになり、シール性能が、外枠内への蓋体の嵌挿状態（正規でない状態）に応じて低下することを防止できる。 In addition, in this floor inspection opening 1, since the inclination angle θ2 of the inclined wall outer surface 31a of the lid body 4 is larger than the inclination angle θ1 of the inclined wall inner surface 11a of the outer frame 3, the outer frame When closing the opening 6, dirt or the like may get caught between the outer surface 31a of the sloped wall of the lid 4 and the inner surface 11a of the sloped wall of the outer frame 3, or the outer surface 31a of the sloped wall and the inner surface 11a of the sloped wall may , the lid body 4 will not engage with the outer frame 3 depending on how it is inserted into the outer frame 3. Therefore, when the lid 4 is inserted into the outer frame 3, the insertion is in a normal state, and the load of the lid 4 acts on the packing material 33 via the annular groove 32 of the lid 4. The packing material 33 is reliably compressed and deformed. As a result, when the lid body 4 is inserted into the outer frame 3, it is possible to accurately ensure the sealing performance between the outer frame 3 and the lid body 4 at any time, and the sealing performance is improved by the sealing performance of the lid body into the outer frame. It is possible to prevent deterioration depending on the inserted state (incorrect state).

しかもこの場合、上記パッキング材３３の圧縮変形に伴い、蓋体４の底板部３０が第２支持部１８に当接するまで変位し、パッキング材３３には、蓋体４の荷重のうちの所定荷重（設定荷重）が確実に作用する。このため、蓋体４を外枠３内に嵌挿したときには、パッキング材３３の圧縮変形を一定として、そのシール性能を、一定の高い状態に維持できる。 Moreover, in this case, as the packing material 33 is compressed and deformed, the bottom plate part 30 of the lid body 4 is displaced until it comes into contact with the second support part 18, and the packing material 33 is loaded with a predetermined load of the load of the lid body 4. (set load) is applied reliably. Therefore, when the lid body 4 is inserted into the outer frame 3, the compressive deformation of the packing material 33 can be kept constant, and its sealing performance can be maintained at a constant high level.

さらに、外枠３の傾斜壁部１１が傾斜され、その傾斜壁部１１がモルタル２７により支えられることから、外枠３は、傾斜壁部１１を傾斜させない場合（直立の場合）よりも広い面をもってモルタル２７により受止められることになり、蓋体４が重量物であっても、その蓋体４を外枠３に的確に支持させることができる（外枠３の脱落防止）。 Furthermore, since the inclined wall part 11 of the outer frame 3 is inclined and the inclined wall part 11 is supported by the mortar 27, the outer frame 3 has a wider surface area than when the inclined wall part 11 is not inclined (in the case of being upright). Therefore, even if the lid 4 is heavy, the lid 4 can be accurately supported by the outer frame 3 (preventing the outer frame 3 from falling off).

図１０は第２実施形態、図１１～図１４は第３実施形態を示す。各実施形態において、前記第１実施形態と同一構成要素については同一符号を付してその説明を省略する。 FIG. 10 shows the second embodiment, and FIGS. 11 to 14 show the third embodiment. In each embodiment, the same components as those in the first embodiment are given the same reference numerals, and the explanation thereof will be omitted.

図１０に示す第２実施形態は、床下開口５を区画するものとして、コンクリート基盤２２に代えて木枠２２Ｂが用いた場合を示している。この第２実施形態においては、木枠２２Ｂに、床下開口５の周囲において複数の第１、第２アンカー２３Ａ，２３Ｂが取付けられ、外枠３の各外枠構成材９が、各第1、第２固定片２０Ａ，２０Ｂ、第１、第２アンカー２３Ａ，２３Ｂを介して木枠２２Ｂに固定される。この場合、外枠３の第２支持部１８及び折曲部１９が木枠２２Ｂの上部内側角部４０にあてがわれ、木枠２２Ｂに対する外枠３の位置決めのために、第２支持部１８及び折曲部１９はガイドとして用いられる。これにより、床点検口１の施工を容易にすることができる。この場合も、外枠３の位置決め後、外枠３の周囲にモルタル２７が充填されるなど、様々な方法により床面２が形成される。 A second embodiment shown in FIG. 10 shows a case where a wooden frame 22B is used instead of the concrete base 22 to partition the underfloor opening 5. In this second embodiment, a plurality of first and second anchors 23A and 23B are attached to the wooden frame 22B around the underfloor opening 5, and each of the outer frame components 9 of the outer frame 3 It is fixed to the wooden frame 22B via the second fixing pieces 20A, 20B and the first and second anchors 23A, 23B. In this case, the second support part 18 and the bent part 19 of the outer frame 3 are applied to the upper inner corner part 40 of the wooden frame 22B, and the second support part 18 And the bent portion 19 is used as a guide. Thereby, construction of the floor inspection port 1 can be facilitated. In this case as well, after positioning the outer frame 3, the floor surface 2 is formed by various methods, such as filling the periphery of the outer frame 3 with mortar 27.

図１１～図１４に示す第３実施形態は、コンクリート基盤２２に対する外枠３の取付け方法の変形例を示す。この第３実施形態においても、前記第１実施形態と同様、帯状形状の第１固定片２０Ａ及び第２固定片２０Ｂが用いられる（図１３参照）。 The third embodiment shown in FIGS. 11 to 14 shows a modification of the method of attaching the outer frame 3 to the concrete base 22. Also in this third embodiment, like the first embodiment, a band-shaped first fixing piece 20A and a second fixing piece 20B are used (see FIG. 13).

本実施形態においては、図１１に示すように、前記第１、第２実施形態とは異なり、第１固定片２０Ａ及び第２固定片２０Ｂの各基端部４１が外枠３における第１支持部１４の下面にそれぞれ取付けられている。そして、その各基端部４１よりも先端部４２にかけては、その各基端部４１から一定長さの中間部分４３が第１支持部１４の下方に伸びるよう
に折曲され、その中間部分４３を超えた先端側部分４４が、外枠３横方向外方に遠のいて伸びるように折曲されている。このため、このような外枠３が設置位置に配置されたときには（モルタル２７の充填前には）、図１１、図１２に示すように、各第１固定片２０Ａ及び各第２固定片２０Ｂは、その中間部分４３が上下方向に伸び、先端側部分４４が、外枠３の横方向外方に向けて、コンクリート基盤２２に沿って伸びる。 In this embodiment, as shown in FIG. 11, unlike the first and second embodiments, each base end portion 41 of the first fixing piece 20A and the second fixing piece 20B is the first support in the outer frame 3. They are attached to the lower surface of the section 14, respectively. From each base end portion 41 to the distal end portion 42, an intermediate portion 43 of a certain length is bent from each base end portion 41 to extend below the first support portion 14, and the intermediate portion 43 A distal end portion 44 extending beyond the outer frame 3 is bent so as to extend outward in the lateral direction of the outer frame 3. Therefore, when such an outer frame 3 is placed at the installation position (before filling the mortar 27), each of the first fixing pieces 20A and each of the second fixing pieces 20B, as shown in FIGS. 11 and 12, The intermediate portion 43 extends in the vertical direction, and the tip end portion 44 extends laterally outward of the outer frame 3 along the concrete base 22.

前記外枠３の設置位置周辺下部（床下開口５の周囲）には、図１１に示すように、コンクリート基盤２２が配置され、そのコンクリート基盤２２には、固定部材としての複数のねじ棒２４が植設されている。この複数の各ねじ棒２４は、外枠３における各第１固定片２０Ａ（各第２固定片２０Ｂ）の先端部４２が固定される対象としての役割を有しており、この複数のねじ棒２４としては、部品の共通化を図る観点から、前記第１、第２実施形態に係る第１、第２アンカー２３Ａ，２３Ｂのねじ棒２４Ａ，２４Ｂが利用されている。このため、外枠３が設置位置に所定状態にあるようにされたときには（図１１、図１２において、モルタル２７の充填前の状態）、その外枠３における各第１固定片２０Ａ（各第２固定片２０Ｂ）の先端部４２が各ねじ棒２４に至り、その各第１固定片２０Ａ（各第２固定片２０Ｂ）の先端部４２における長孔２１Ａ内にはその先端開口を介して各ねじ棒２４が入ることになる。この状態の下で、各第１固定片２０Ａ（各第２固定片２０Ｂ）の先端部４２と各ねじ棒２４とが固定されている。この場合、本実施形態において、第１実施形態に係る第１、第２アンカー２３Ａ，２３Ｂ（ねじ棒２４Ａ，２４Ｂ）を利用することに着目し、ねじ棒２４にナット２５、２５を螺合させ、そのナット２５、２５をもって、各ねじ棒２４に対する各第１固定片２０Ａ（各第２固定片２０Ｂ）の固定の補強が図られる。このナット２５、２５による補強を図るに際しては、各第１固定片２０Ａ（各第２固定片２０Ｂ）の先端部４２とねじ棒２４とを固定した後、ナット２５、２５により各第１固定片２０Ａ（各第２固定片２０Ｂ）の先端部４２を挟持してもよいし、ナット２５、２５により各第１固定片２０Ａ（各第２固定片２０Ｂ）の先端部４２を挟持した後、その第１、第２固定片２０Ａ，２０Ｂの先端部４２をねじ棒２４に固定してもよい。勿論この場合、ナット２５、２５を省いてもよい。 As shown in FIG. 11, a concrete base 22 is arranged at the lower part of the installation position of the outer frame 3 (around the underfloor opening 5), and a plurality of threaded rods 24 as fixing members are mounted on the concrete base 22. It is planted. Each of the plurality of threaded rods 24 serves as an object to which the tip end portion 42 of each first fixed piece 20A (each second fixed piece 20B) in the outer frame 3 is fixed, and the plurality of threaded rods 24, the threaded rods 24A, 24B of the first and second anchors 23A, 23B according to the first and second embodiments are used from the viewpoint of standardizing parts. Therefore, when the outer frame 3 is in a predetermined state at the installation position (in FIGS. 11 and 12, the state before filling with mortar 27), each first fixing piece 20A (each first fixing piece 20A in the outer frame 3) The tips 42 of the second fixing pieces 20B) reach each threaded rod 24, and the long holes 21A in the tips 42 of each first fixing piece 20A (each second fixing piece 20B) are connected to each other through the tip openings. A threaded rod 24 will be inserted. Under this state, the tip portion 42 of each first fixing piece 20A (each second fixing piece 20B) and each threaded rod 24 are fixed. In this case, in this embodiment, attention is paid to the use of the first and second anchors 23A, 23B (threaded rods 24A, 24B) according to the first embodiment, and the nuts 25, 25 are screwed onto the threaded rod 24. With the nuts 25, 25, the fixation of each first fixing piece 20A (each second fixing piece 20B) to each threaded rod 24 is reinforced. When reinforcing the nuts 25, 25, after fixing the tip 42 of each first fixing piece 20A (each second fixing piece 20B) to the threaded rod 24, each first fixing piece is tightened with the nuts 25, 25. 20A (each of the second fixing pieces 20B) may be clamped, or after the tips 42 of each of the first fixing pieces 20A (each of the second fixing pieces 20B) are clamped with the nuts 25, 25, The tips 42 of the first and second fixing pieces 20A and 20B may be fixed to the threaded rod 24. Of course, in this case, the nuts 25, 25 may be omitted.

上記各第１固定片２０Ａ（各第２固定片２０Ｂ）の先端部４２を各ねじ棒２４に固定するに先立ち、外枠３の高さ及び姿勢の調整が行われる。具体的に、図１３、図１４に基づき説明する。 Prior to fixing the tip portions 42 of each of the first fixing pieces 20A (each of the second fixing pieces 20B) to each threaded rod 24, the height and posture of the outer frame 3 are adjusted. Specifically, this will be explained based on FIGS. 13 and 14.

床点検口１が設けられる床下構造は、一般に、床部４６に凹部４７が形成され、その凹部４７の底面４７ａには、その凹部底面４７ａよりも縮小された前記床下開口５が形成されている。床部４６上面と凹部底面４７ａとの間には段差４８が形成され、凹部底面４７ａが前記コンクリート基盤２２の上面として形成され、そのコンクリート基盤２２の上面（凹部底面４７ａ）に、床下開口５の周囲において、前述の如く、複数のねじ棒２４が植設されている。 The underfloor structure in which the floor inspection opening 1 is provided generally has a recess 47 formed in the floor 46, and the underfloor opening 5 smaller than the recess bottom 47a is formed in the bottom 47a of the recess 47. . A step 48 is formed between the top surface of the floor 46 and the bottom surface 47a of the recess, and the bottom surface 47a of the recess is formed as the top surface of the concrete base 22. As described above, a plurality of threaded rods 24 are installed around the periphery.

このような床下構造の下で、外枠３の高さ及び姿勢の調整を行うべく、外枠３は、長尺な一対の支持部材４９を利用して床下開口５の上方に所定状態で配置される。具体的には、外枠３の上側に、その対向する一組の外枠構成材９を跨ぐようにした状態で長尺な一対の支持部材４９を取付けた上で、その各支持部材４９を、凹部４７を跨ぐように配置する。これにより、各支持部材４９の端部を床部４６上面上に位置させ、外枠３を床下開口５の上方に所定状態で配置させることができることになる（図１４参照）。この場合、長尺な一対の支持部材４９が、対向する一組の外枠構成材９を跨いでいるのは、対向する他組の外枠構成材９の場合とは異なり、その一組の各外枠構成材９の両側部に第２固定片２０Ｂが設けられておらず、各支持部材４９の配置に支障を与えないからである。 Under such an underfloor structure, in order to adjust the height and posture of the outer frame 3, the outer frame 3 is placed above the underfloor opening 5 in a predetermined state using a pair of elongated support members 49. be done. Specifically, a pair of elongated support members 49 are attached to the upper side of the outer frame 3 so as to straddle a pair of opposing outer frame constituent members 9, and each of the support members 49 is then , are arranged so as to straddle the recess 47. Thereby, the ends of each support member 49 can be positioned on the upper surface of the floor part 46, and the outer frame 3 can be arranged in a predetermined state above the underfloor opening 5 (see FIG. 14). In this case, the pair of elongated support members 49 straddles a pair of opposing outer frame members 9, unlike in the case of other opposing pairs of outer frame members 9. This is because the second fixing pieces 20B are not provided on both sides of each outer frame component 9 and do not interfere with the arrangement of each support member 49.

各支持部材４９の端部を床部４６上面上に位置させるに際しては、各支持部材４９の端
部と床部４６上面との間にくさび部材５０が介在される。各くさび部材５０は、支持部材４９の長手方向内方に向うに従って高さが低くなる斜面５０ａを有しており、その各くさび部材５０を支持部材４９の長手方向にスライドさせて、各くさび部材５０の斜面５０ａに対する支持部材４９の端部の位置を調整することにより、外枠３の高さ及び姿勢が調整される。この一対の支持部材４９及びくさび部材５０に基づく外枠３の高さ及び姿勢の調整が行われた上で、前述の各ねじ棒２４に対する各第１固定片２０Ａ（各第２固定片２０Ｂ）の先端部４２の固定が行われる。これにより、外枠３は、床面に対して高さ及び姿勢の調整が行われたことになり、外枠３から一対の支持部材４９が外される。 When positioning the end of each support member 49 on the upper surface of the floor 46, a wedge member 50 is interposed between the end of each support member 49 and the upper surface of the floor 46. Each wedge member 50 has a slope 50a whose height decreases as it goes inward in the longitudinal direction of the support member 49, and by sliding each wedge member 50 in the longitudinal direction of the support member 49, each wedge member By adjusting the position of the end of the support member 49 with respect to the slope 50a of the outer frame 3, the height and posture of the outer frame 3 are adjusted. After the height and posture of the outer frame 3 are adjusted based on the pair of support members 49 and the wedge member 50, each of the first fixing pieces 20A (each of the second fixing pieces 20B) is attached to each of the threaded rods 24 described above. The distal end portion 42 of is fixed. As a result, the height and posture of the outer frame 3 have been adjusted with respect to the floor surface, and the pair of support members 49 are removed from the outer frame 3.

このように高さ及び姿勢の調整が行われた外枠３の周囲には、図１１、図１２に示すように、前記第１、第２実施形態同様、床仕上げ材料としてのモルタル２７が充填されている（モルタル２７は充填後、硬化）。この外枠３の周囲にモルタル２７が充填されるときにおいても（モルタル２７打設時）、前述同様、押圧力が外枠３に外部から内部に向けて作用することになるが、外枠３における各外枠構成材９の長手方向中央部が、モルタル２７の充填前に、各ねじ棒２４に固定された各第１固定片２０Ａを介してコンクリート基盤２２に固定されていることから、外枠３の各外枠構成材９が、その両端を固定端として外枠３の内方に撓もうとすることが抑制される。このため、この場合においても、外枠３の開口６を開いた状態でその外枠３の周囲にモルタル２７が充填されるとしても、外枠３に対する蓋体４の開閉に支障を来すことはない。 As shown in FIGS. 11 and 12, the area around the outer frame 3 whose height and posture have been adjusted is filled with mortar 27 as a floor finishing material, as in the first and second embodiments. (The mortar 27 is hardened after filling). Even when the mortar 27 is filled around the outer frame 3 (when placing the mortar 27), the pressing force acts on the outer frame 3 from the outside to the inside, as described above, but the outer frame 3 The longitudinal center portion of each outer frame component 9 in is fixed to the concrete base 22 via each first fixing piece 20A fixed to each threaded rod 24 before filling with mortar 27. Each of the outer frame constituent members 9 of the frame 3 is prevented from bending inward of the outer frame 3 with both ends thereof being fixed ends. Therefore, even in this case, even if the mortar 27 is filled around the outer frame 3 with the opening 6 of the outer frame 3 open, opening and closing of the lid 4 with respect to the outer frame 3 will be hindered. There isn't.

以上実施形態について説明したが本発明にあっては、次の態様を包含する。
（１）外枠３の周囲に、床仕上げ材料としてモルタル２７に代えてコンクリートを充填すること。
（２）上述の実施形態に記載したように、各外枠構成材９に第１固定片を設けることが好ましいが、外枠３の角部を形成する２つ又は３つの外枠構成材９（の長手方向中央部）に第１固定片２０Ａをそれぞれ設けても良い。
（３）外枠３を、第１固定片２０Ａを介してコンクリート基盤２２に固定するに際して、第１固定片２０Ａをコンクリート基盤２２に取付けておき、その第１固定片２０Ａを外枠３の各外枠構成材９に取付けること。例えば、第１固定片２０Ａに長孔を形成すると共に外枠３の各外枠構成材９にねじ部を突設し、そのねじ部を第１固定片２０Ａの長孔に通し、そのねじ部に対してナットを螺合することにより、各外枠構成材９をコンクリート基盤２２に固定すること等を行うことができる。
（４）第３実施形態において、各第１固定片２０Ａ（各第２固定片２０Ｂ）の先端部４２と各ねじ棒２４とを固定するに際して、溶接による固定を用いること。 Although the embodiments have been described above, the present invention includes the following aspects.
(1) Filling the periphery of the outer frame 3 with concrete instead of the mortar 27 as a floor finishing material.
(2) As described in the above embodiment, it is preferable that each outer frame component 9 is provided with a first fixing piece, but two or three outer frame components 9 forming the corners of the outer frame 3 The first fixing pieces 20A may be provided at the center portions in the longitudinal direction.
(3) When fixing the outer frame 3 to the concrete base 22 via the first fixing piece 20A, the first fixing piece 20A is attached to the concrete base 22, and the first fixing piece 20A is attached to each of the outer frame 3. Attach it to the outer frame component 9. For example, a long hole is formed in the first fixing piece 20A, and a threaded portion is provided protrudingly on each outer frame component 9 of the outer frame 3, and the threaded portion is passed through the long hole of the first fixing piece 20A. By screwing nuts into the holes, it is possible to fix each outer frame component 9 to the concrete base 22, etc.
(4) In the third embodiment, when fixing the tip portion 42 of each first fixing piece 20A (each second fixing piece 20B) to each threaded rod 24, welding is used.

本発明は、蓋体４側面と外枠３内面との間の上部に弾性シール材３３が配置された床点検口１において、そのシール性能が、外枠３内への蓋体４の嵌挿状態によって低下することを防止するために利用できる。 The present invention provides a floor inspection port 1 in which an elastic sealing material 33 is disposed in the upper part between the side surface of the lid 4 and the inner surface of the outer frame 3, and the sealing performance of the elastic seal material 33 is determined by the insertion and insertion of the lid 4 into the outer frame 3. It can be used to prevent deterioration depending on the condition.

１ 床点検口
２ 床面
３ 外枠
４ 蓋体
６ 外枠の開口（点検開口）
９ 外枠構成材
１０ 側壁部
１１ 外枠の傾斜壁部
１１ａ 外枠の傾斜壁部内面（外枠内面の基本面）
１４ 外枠の第１支持部
１４ａ 外枠の第１支持部上面（第１支持面）
１８ 外枠の第２支持部
１８ａ 外枠の第２支持部上面（第２支持面）
２７ モルタル（床仕上げ材料）
３１ 蓋体の傾斜壁部
３１ａ 蓋体の傾斜壁部外面（蓋体側面の傾斜面）
３２ 環状溝部
３３ パッキング材（弾性シール材）
３４ 内側側部
３７ 環状溝
θ１ 外枠の傾斜壁部内面の傾斜角度
θ２ 蓋体（内枠）の傾斜壁部外面の傾斜角度 1 Floor inspection opening 2 Floor surface 3 Outer frame 4 Lid body 6 Outer frame opening (inspection opening)
9 Outer frame constituent materials 10 Side wall portion 11 Inclined wall portion of the outer frame 11a Inner surface of the inclined wall portion of the outer frame (basic surface of the inner surface of the outer frame)
14 First support part of outer frame 14a First support part upper surface of outer frame (first support surface)
18 Second support part of outer frame 18a Second support part upper surface of outer frame (second support surface)
27 Mortar (floor finishing material)
31 Slanted wall part of the lid body 31a Slanted wall part outer surface of the lid body (slanted surface on the side surface of the lid body)
32 Annular groove 33 Packing material (elastic sealing material)
34 Inner side part 37 Annular groove θ1 Inclination angle of the inner surface of the inclined wall portion of the outer frame θ2 Inclination angle of the outer surface of the inclined wall portion of the lid body (inner frame)

Claims (3)

床面に設けられて床下に臨む開口を区画する外枠と、該外枠内に着脱可能に嵌挿される蓋体と、が備えられている床点検口において、
前記外枠の内面に、該外枠の内面の主体をなして、上方に向かうに従って対向面間隔が拡がるように傾斜される基本面と、該基本面の上端から該外枠の外方に向けて張り出す第１支持面と、が備えられ、
前記蓋体の側面に、前記外枠の基本面に対向しつつ下方に向かうに従って該外枠の基本面との間隔が拡がるように傾斜される傾斜面と、該傾斜面の上部に該蓋体の拡張方向に張り出すように設けられて前記外枠の前記第１支持面に対向する上部外周縁部と、が備えられ、
前記蓋体の該上部外周縁部に弾性シール材が保持され、
前記蓋体の上部外周縁部が、前記傾斜面の上端から上方に起立する内側側部を備え、
前記蓋体は、該蓋体が前記外枠内に嵌挿されたとき、該蓋体における傾斜面と内側側部とがなす角部が、該外枠における第１支持面よりも下方に位置されるように形成されている、
ことを特徴とする床点検口。 A floor inspection port is provided with an outer frame that is provided on the floor surface and defines an opening that faces under the floor, and a lid that is removably fitted into the outer frame,
The inner surface of the outer frame has a basic surface that forms the main part of the inner surface of the outer frame and is inclined so that the distance between opposing surfaces increases as you go upward, and a basic surface that extends from the upper end of the basic surface toward the outside of the outer frame. a first support surface extending from the top;
A sloped surface that faces the basic surface of the outer frame and is inclined so that the distance from the basic surface of the outer frame increases as it goes downward, on a side surface of the lid; an upper outer peripheral edge portion extending in the expansion direction of the outer frame and facing the first support surface of the outer frame;
an elastic sealing material is held at the upper outer peripheral edge of the lid ;
The upper outer peripheral edge of the lid includes an inner side portion that stands upward from the upper end of the inclined surface,
The lid is configured such that when the lid is inserted into the outer frame, a corner formed by an inclined surface and an inner side portion of the lid is located below a first support surface of the outer frame. is formed to be
A floor inspection port characterized by: 請求項１において、
前記蓋体の上部外周縁部が、前記内側側部と、該内側側部の上端から前記蓋体の拡張方向に水平方向に張り出す張り出し部と、該張り出し部の張り出し端から下方に垂下する外側側部とにより、下方に開口した溝形状に形成され、
前記上部外周縁部の溝形状内に前記弾性シール材が収納保持されている、
ことを特徴とする床点検口。 In claim 1,
The upper outer peripheral edge of the lid body includes the inner side part, an overhang part that extends horizontally from the upper end of the inner side part in an expansion direction of the lid body, and hangs downward from the overhang end of the overhang part. The outer side part is formed into a downwardly opening groove shape,
the elastic sealing material is housed and held within the groove shape of the upper outer peripheral edge;
A floor inspection port characterized by: 請求項１又は２において、
前記外枠の内面に、該外枠の基本面の下端から該外枠の内方に向けて張り出す第２支持面が備えられ、
前記第１支持面と前記蓋体の上部外周縁部とにより前記弾性シール材が弾性変形され、
前記蓋体の下面が、前記外枠の第２支持面に当接するように形成されている、
ことを特徴とする床点検口。
In claim 1 or 2,
The inner surface of the outer frame is provided with a second support surface that extends inward from the lower end of the basic surface of the outer frame,
the elastic sealing material is elastically deformed by the first support surface and the upper outer peripheral edge of the lid;
A lower surface of the lid body is formed to abut against a second support surface of the outer frame.
A floor inspection port characterized by:
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JP2010265722A (en) 2009-05-18 2010-11-25 Matsuzaki Kinzoku:Kk Floor hatch
US20120175369A1 (en) 2011-01-11 2012-07-12 Azek Building Products, Inc. Deck storage bin system

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