JP4763098B1 - Taper mating release device for iron cover for underground structure - Google Patents

Taper mating release device for iron cover for underground structure Download PDF

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JP4763098B1
JP4763098B1 JP2011061287A JP2011061287A JP4763098B1 JP 4763098 B1 JP4763098 B1 JP 4763098B1 JP 2011061287 A JP2011061287 A JP 2011061287A JP 2011061287 A JP2011061287 A JP 2011061287A JP 4763098 B1 JP4763098 B1 JP 4763098B1
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iron lid
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JP2012197574A (en
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正吾 大塚
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長島鋳物株式会社
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Abstract

【課題】テーパー嵌合による鉄蓋の食い込みの解除を、開閉工具を用いた一連の操作で支障なく行うことができるとともに、ロック機構が簡単には解除されないようにする。
【解決手段】開閉工具18を挿入可能なバール孔を開閉可能に閉塞し、かつ、閉方向へ付勢された閉塞部材20を鉄蓋の裏面に装着し、上記閉塞部材に対して独立的に作動し、受け枠の内周に設けられた内突部22の下方に位置してロック状態となり、上記内突部の下方の位置よりも内方に移動してアンロック状態となるロック部材25を鉄蓋の裏面に回転可能に装着し、上記ロック部材は、開閉工具の先端部18aにより加圧されてアンロック位置へ移動し、記受け枠の内突部の上面に当接する係合突部26をロック部材の上部に具備し、開閉工具18を左右へ傾けることによって、上記先端部の一部が係合突部26の上面に当接し、上記先端部の他部が鉄蓋の裏面に当接して食い込みを解除する。
【選択図】 図4
An object of the present invention is to make it possible to release the biting of an iron lid by taper fitting without any trouble by a series of operations using an opening / closing tool, and to prevent a lock mechanism from being easily released.
A burr hole into which an open / close tool can be inserted is closed so as to be openable and closed, and a closing member urged in a closing direction is attached to the back surface of the iron lid, independently of the closing member. The lock member 25 which operates and is positioned below the inner protrusion 22 provided on the inner periphery of the receiving frame and is locked, and moves inward from the position below the inner protrusion and is unlocked. Is attached to the rear surface of the iron lid so that the lock member is pressed by the tip end portion 18a of the opening / closing tool and moved to the unlock position, and is brought into contact with the upper surface of the inner projection portion of the receiving frame. A portion 26 is provided on the upper portion of the lock member, and by tilting the opening / closing tool 18 to the left and right, a part of the tip is brought into contact with the upper surface of the engaging projection 26, and the other part of the tip is the back surface of the iron lid. The bite is released by touching.
[Selection] Figure 4

Description

本発明は、鉄蓋がその受け枠にテーパー嵌合による食い込みを生じて受け止められる地下構造物用鉄蓋において、開閉工具を用いて上記食い込みを解除するための装置に関するものである。   The present invention relates to an apparatus for canceling the biting by using an open / close tool in an iron lid for an underground structure in which the iron lid is caught by taper fitting in the receiving frame.

鉄蓋とそれを受け止める受け枠がテーパー嵌合による食い込みを生じる地下構造物用鉄蓋では、バールと通称される開閉工具を用いて上記食い込みを解除する。バールを差し込むいわゆるバール孔は、従来、鉄蓋の外周縁にその一部を例えばU字型に切り欠くようにして設けているが、バール孔から雨水が侵入するので、バール孔を閉塞する閉塞板を閉塞方向にばねによって付勢するなどの対策が講じられた(特開2006−233654号)。同発明の装置は雨水侵入の防止に相応の有効性を示すが、鉄蓋の外周縁を切り欠いた構造は雨水が侵入し易いため限界があった。切り欠き構造の代わりに、鉄蓋の外周縁から内方へ離れた位置に貫通状のバール孔を形成することも行なわれた。バール孔を外周縁から離してしまうと受け枠を支点としたバールを用いた梃子作用ができないため、一般的なバールによる操作では食い込みを解除することができず、特殊な専用バールを必要としたり(特開平7−90871号)、一旦バール孔からバールを抜き取り、こじり孔に差し込み直して食い込みを解除し、その後再びバールをバール孔に差し込んで開蓋したりしなければならない。これは、例えば、開蓋時に不意に鉄蓋を降して軽い食い込みを生じた程度の状況でも、上記の手順を繰り返して一々食い込みを解除しなければならないということであり、操作が煩わしいという問題がある。   In an iron lid for an underground structure in which an iron lid and a receiving frame that receives the iron lid cause bite by taper fitting, the bite is released using an opening / closing tool commonly called a bar. Conventionally, a so-called bar hole for inserting a bar is provided on the outer peripheral edge of the iron lid so that a part of the bar is cut into, for example, a U-shape, but rainwater enters from the bar hole, so that the bar hole is blocked. Measures such as urging the plate with a spring in the closing direction have been taken (Japanese Patent Laid-Open No. 2006-233654). Although the apparatus of the present invention shows a corresponding effectiveness in preventing rainwater intrusion, the structure in which the outer periphery of the iron lid is cut out has a limit because rainwater easily enters. Instead of the notch structure, a penetrating burl hole was also formed at a position away from the outer periphery of the iron lid inward. If the bar hole is moved away from the outer peripheral edge, the lever action using the bar with the receiving frame as a fulcrum cannot be performed, so that the bite cannot be released by a general bar operation, and a special dedicated bar is required. (Japanese Patent Laid-Open No. 7-90871), it is necessary to remove the bar from the burr hole, reinsert it into the pry hole, release the bite, and then reinsert the burl into the burr hole to open the lid. This is, for example, that even if the iron lid is unexpectedly lowered when the lid is opened and light bite occurs, the above procedure must be repeated to release the bite one by one, and the operation is troublesome. There is.

これに対して、特開2007−100294号、特開2007−100295号及び特開2007−100296号が提案されており、これらの発明は良好な止水性を実現するとともに、専用のバールを必要とせずに蓋本体の食い込みを解除できるようにするというものである。これらの発明は、何れも独立した貫通状のバール孔を有しているが、バール孔を閉鎖する可動支点蓋又は可動蓋がロック機構の操作部を兼ねるような構造であり、開蓋操作により可動支点蓋又は可動蓋がロック機構と直接的に連動する。そのため、バールで可動支点蓋又は可動蓋を押し込むことによって簡単にロック機構が解錠され、しかも専用のバールを必要とせずにそれが可能ということでもあるので、悪戯でロックが解除されたり、さらには、鉄蓋を開けてゴミの不法投棄を招く等の問題を起こされたりする恐れがある。   On the other hand, Japanese Patent Application Laid-Open No. 2007-1000029, Japanese Patent Application Laid-Open No. 2007-1000029, and Japanese Patent Application Laid-Open No. 2007-1000029 are proposed, and these inventions realize good water stoppage and require a dedicated bar. Without the bite of the lid body being released. Each of these inventions has an independent penetrating burl hole, but the movable fulcrum lid or the movable lid that closes the burr hole also serves as the operation part of the lock mechanism. The movable fulcrum lid or the movable lid is directly interlocked with the lock mechanism. Therefore, the lock mechanism can be easily unlocked by pushing the movable fulcrum lid or movable lid with a bar, and it is possible to do so without the need for a dedicated bar. May cause problems such as opening the iron lid and causing illegal dumping of garbage.

また、上記特開2007−100294号の発明では突っ張り部材が可動支点蓋と一体をなしているため、可動支点蓋と蓋本体の裏面との間に小石などが挟み込まれると、ロック機構が解除状態になる恐れがある。ロック機構が解除状態になるということは、豪雨などで下水道に雨水が侵入した場合に、鉄蓋に加わる押し上げ力に対抗できなくなるということであり、マンホールを開口させたり、そこに歩行者や自動車が転落したりする原因となる。特開2007−100295号及び特開2007−100296号の発明の場合も同様であり、例えば、特開2007−100295号の場合、可動支点蓋と回転部材を、圧縮ばねを介在させて下降と原位置復帰するという複雑な構成を有しているため、小石などが挟み込まれて隙間ができそこから雨水と共に土砂が侵入すると、詰まって作動不良となる恐れがある。また、特開2007−100296号についても、可動蓋と蓋本体の裏面との間に小石などが挟み込まれると、ロック機構が解除状態になる恐れがある。   Further, in the invention of Japanese Patent Application Laid-Open No. 2007-1000029, since the tension member is integrated with the movable fulcrum lid, the lock mechanism is released when pebbles are sandwiched between the movable fulcrum lid and the back surface of the lid body. There is a risk of becoming. The release of the lock mechanism means that if rainwater enters the sewer due to heavy rain, it will not be possible to resist the pushing force applied to the iron lid, and a manhole will be opened, or there will be a pedestrian or automobile. Cause falling. The same applies to the inventions of Japanese Patent Application Laid-Open Nos. 2007-1000029 and 2007-1000029. For example, in the case of Japanese Patent Application Laid-Open No. 2007-1000029, the movable fulcrum lid and the rotating member are moved downward and original through a compression spring. Since it has a complicated structure of returning to its position, if pebbles or the like are sandwiched between it and a gap is formed, and soil and sand enter with rain water from there, there is a risk of clogging and malfunction. Also in Japanese Patent Application Laid-Open No. 2007-1000029, if a pebble or the like is sandwiched between the movable lid and the back surface of the lid body, the lock mechanism may be released.

本発明の対象である地下構造物用鉄蓋は、鉄蓋とそれを受け止める受け枠がテーパー嵌合による食い込みを生じるように設定されている。しかし、鉄蓋を受け枠に嵌め合わせたときに掛かる程度の荷重(これを初期荷重と呼ぶ。)でテーパー嵌合を生じているときに、鉄蓋と受け枠との食い込みは軽度であり、バールを用いて梃子作用によりこじ開けるまでもなく、その食い込みを容易に解除することができる。例えば、人や自転車、或いは乗用車等が鉄蓋上を走行して掛かる程度の荷重は、初期荷重の範囲内と見做し得る。初期荷重を超える荷重を超過荷重と呼ぶこととすると、これは、例えば、大型トラックなどの軸荷重の大きい重車両が鉄蓋上を走行して加えられる荷重に相当し、過度の食い込みを生じる荷重ということができる。前述した各文献記載の発明は、初期荷重による軽度の食い込みの解除と、超過荷重による過度の食い込みの解除を行うのに支障はないが、しかし、特許文献2、3、4ではロック機構が解除され易いという問題がある。   The iron lid for an underground structure that is the subject of the present invention is set so that the iron lid and the receiving frame that receives the iron lid are bitten by taper fitting. However, when the taper is fitted with a load that is applied when the iron lid is fitted to the receiving frame (this is referred to as the initial load), the biting between the iron lid and the receiving frame is mild, It is possible to easily release the bite without using a bar to pry it open by lever action. For example, a load that is applied to a person, a bicycle, a passenger car, or the like traveling on an iron lid can be regarded as being within the range of the initial load. If the load exceeding the initial load is called an excess load, this corresponds to a load that is applied when a heavy vehicle with a large axial load, such as a large truck, travels on an iron lid and causes excessive biting. It can be said. The invention described in each of the above-mentioned documents has no problem in releasing slight biting due to initial load and excessive biting due to overload. However, in Patent Documents 2, 3, and 4, the lock mechanism is released. There is a problem that it is easy to be done.

特開2006−233654号JP 2006-233654 A 特開2007−100294号JP2007-1000029 特開2007−100295号JP2007-1000029 特開2007−100296号JP2007-100706 特開平7−90871号JP-A-7-90871

本発明は前記の点に着目してなされたもので、その課題は、初期荷重による食い込みの解除と、超過荷重による過度の食い込みの解除を、1個の開閉工具を用いた一連の操作で支障なく行うことができるとともに、バール孔の閉塞部材と鉄蓋の裏面との間に小石等が挟み込まれても、ロック機構が簡単には解除されない地下構造物用鉄蓋におけるテーパー嵌合解除装置を提供することである。また、本発明の他の課題は、開閉工具を用いた一連の開蓋操作において、通常とは異なる操作を必要とすることにより、開蓋方法を察知され難い地下構造物用鉄蓋におけるテーパー嵌合解除装置を提供することである。   The present invention has been made paying attention to the above points, and its problem is that a series of operations using one open / close tool hinders the release of the bite due to the initial load and the release of the excessive bite due to the excess load. A taper fitting release device in an iron cover for underground structures that can be easily released even if pebbles or the like are sandwiched between the closure member of the burl hole and the back surface of the iron cover. Is to provide. In addition, another object of the present invention is to provide a taper fit in an iron cover for an underground structure, which is difficult to detect the opening method by requiring a different operation in a series of opening operations using an opening / closing tool. It is to provide a release device.

前記の課題を解決するため、本発明は、鉄蓋がその受け枠にテーパー嵌合による食い込みを生じて受け止められる地下構造物用鉄蓋において、開閉工具を用いて上記食い込みを解除するための装置について、開閉工具を挿入可能なバール孔を、鉄蓋の周縁部よりも内方の位置に貫通状に設けるとともに、上記バール孔を開閉可能に閉塞し、かつ、閉方向へ付勢された閉塞部材を鉄蓋の裏面に装着し、上記閉塞部材に対して独立的に作動可能であり、受け枠の内周に設けられた内突部の下方に位置してロック状態となり、上記内突部の下方の位置よりも内方に移動してアンロック状態となるロック部材を鉄蓋の裏面に回転可能に装着し、上記ロック部材は、閉塞部材を押し下げている開閉工具の先端部により加圧されて、アンロック位置へ移動し、かつ、上記受け枠の内突部の上面に当接する係合突部をロック部材の上部に具備し、テーパー嵌合による食い込みを解除する際、上記開閉工具の先端部をバール孔に挿入した状態で左右へ傾けることによって、上記先端部の一部がアンロック状態にあるロック部材の係合突部の上面に当接してそれ以上は押し下げられない状態となり、上記先端部の他部が鉄蓋の裏面に当接して鉄蓋を押し上げ、食い込みを解除するように構成するという手段を講じたものである。   In order to solve the above-described problems, the present invention provides an apparatus for releasing an encroachment using an open / close tool in an iron cover for an underground structure in which an iron cover is received by a taper fitting of the iron cover. The bar hole into which the opening / closing tool can be inserted is provided in a penetrating manner at a position inward of the peripheral portion of the iron lid, and the bar hole is closed so as to be opened and closed and is closed in the closing direction. A member is mounted on the back surface of the iron lid, can be operated independently with respect to the closing member, is positioned below the inner protrusion provided on the inner periphery of the receiving frame, and is in a locked state. A lock member that moves inward from the lower position of the door and is unlocked is rotatably mounted on the back surface of the iron lid, and the lock member is pressurized by the tip of the open / close tool that pushes down the closing member Moved to unlock position In addition, an engagement protrusion that abuts the upper surface of the inner protrusion of the receiving frame is provided on the upper portion of the lock member, and when the bite due to taper fitting is released, the tip of the opening / closing tool is inserted into the burl hole. By tilting left and right in this state, a part of the tip is brought into contact with the upper surface of the engaging projection of the lock member in the unlocked state and cannot be pushed down any more. A means is adopted in which the iron lid is pushed up by coming into contact with the back surface of the lid to release the bite.

本発明は、テーパー嵌合による食い込みを生じている鉄蓋とその受け枠について、開閉工具を用いて上記食い込みを、それが軽度の食い込みであるか過度の食い込みであるかを問わずに、開閉工具による一連の操作で解除し得るようにするものであり、また、バール孔から雨水を侵入させないことを目的とした装置でもある。なお、本発明は円形鉄蓋を主な対象として構成されているが、その趣旨を円形鉄蓋以外の地下構造物用鉄蓋に適用し得ることもまた当然である。   The present invention relates to an iron lid and its receiving frame that have bite due to taper fitting, and the bite is opened and closed regardless of whether it is light bite or excessive bite using an open / close tool. It can be released by a series of operations with a tool, and is also an apparatus intended to prevent rainwater from entering through the burr hole. In addition, although this invention is comprised mainly by the circular iron cover, it is natural that the meaning can be applied to the iron cover for underground structures other than a circular iron cover.

本発明の装置では、開閉工具を挿入可能なバール孔を、鉄蓋の周縁部よりも内方の位置に貫通状に設けるとともに、上記バール孔を開閉可能に閉塞し、かつ、閉方向へ付勢された閉塞部材を鉄蓋の裏面に装着する。バール孔の位置は、後述するロック部材の係合突部に対する開閉工具の操作を考慮して決定されるが、鉄蓋の周縁部から内方へ離れ過ぎない位置を選定する。閉塞部材は、上記貫通状のバール孔の閉塞を第一義とし、かつ、閉方向へ付勢され、切り欠き状では期待できない閉塞効果を発揮する。   In the apparatus of the present invention, a burl hole into which the open / close tool can be inserted is provided in a penetrating manner at a position inward of the peripheral portion of the iron lid, and the burl hole is closed so as to be openable / closable and attached in the closing direction. The energized closing member is attached to the back surface of the iron lid. The position of the burl hole is determined in consideration of the operation of the opening / closing tool with respect to the engagement protrusion of the lock member, which will be described later, but a position that is not too far away from the periphery of the iron lid is selected. The closing member is primarily designed to close the penetrating burl hole and is urged in the closing direction to exhibit a blocking effect that cannot be expected in a notch shape.

上記閉塞部材に対して独立的に作動可能であり、受け枠の内周に設けられた内突部の下方に位置してロック状態となり、上記内突部の下方の位置よりも内方に移動してアンロック状態となる、ロック部材を鉄蓋の裏面に吊り下げにより回転可能に装着する。上記内突部には、受け枠の内周に環状に設けられている既存の内向きの突状構造を利用することができる。   It can be operated independently with respect to the closing member, is positioned below the inner projection provided on the inner periphery of the receiving frame, is locked, and moves inward from a position below the inner projection. Then, the lock member, which is unlocked, is rotatably mounted on the back surface of the iron lid by hanging. For the inner protrusion, an existing inward protruding structure provided in an annular shape on the inner periphery of the receiving frame can be used.

上記ロック部材は、閉塞部材を押し下げている開閉工具の先端部により加圧されてアンロック位置へ回転移動し、かつ、ロック部材は、その回転移動後、受け枠の上記内突部に当接してそれ以上は押し下げられない状態とする、係合突部を具備しているものとする。係合突部はロック部材の上部に位置し、前述した開閉工具の先端部によって操作され、回転移動後に係合突部が受け枠の内突部の上面に当接するように、適切な位置及び形態に設けられる。   The lock member is pressed by the tip of the opening / closing tool that pushes down the closing member and rotates to the unlock position, and the lock member contacts the inner protrusion of the receiving frame after the rotation. It is assumed that it has an engaging projection that cannot be pushed down any further. The engaging protrusion is positioned at the upper part of the lock member, and is operated by the tip of the opening / closing tool described above, and the appropriate position and position so that the engaging protrusion contacts the upper surface of the inner protrusion of the receiving frame after rotational movement. Provided in the form.

上記開閉工具は、先端部をバール孔に挿入した状態で左右へ傾けることによってその一部がロック部材の係合突部の上面に当接し、上記先端部の他部が鉄蓋の裏面に当接した配置を取るものとする。開閉工具による開蓋作業では、鉄蓋の中心を通る線上に沿った方向での操作が普通であるが、本発明では、バール孔の開口は鉄蓋の内外方向にやや長い形態を有し、係合突部はロック部材の上部、かつ、上記バール孔の開口範囲よりも側方にずれた位置に配置することができる。このため、ロック部材の係合突部を閉塞部材の側方に配置する構成となり、先端部をバール孔に挿入した状態で開閉工具を左右へ傾ける操作が必要になり、普通の開蓋操作と異なるので、開蓋方法を察知され難い。   A part of the opening / closing tool is tilted to the right and left with the tip inserted into the burr hole, so that a part of the tool comes into contact with the upper surface of the engaging projection of the lock member, and the other part of the tip is brought into contact with the back of the iron lid. It shall be placed in contact. In the opening work with the opening and closing tool, the operation in the direction along the line passing through the center of the iron lid is normal, but in the present invention, the opening of the bar hole has a slightly longer form in the inner and outer directions of the iron lid, The engaging protrusion can be arranged at an upper portion of the lock member and at a position shifted laterally from the opening range of the burl hole. For this reason, the engagement protrusion of the lock member is arranged on the side of the closing member, and an operation of tilting the open / close tool left and right with the tip portion inserted into the burl hole is required. Since it is different, it is difficult to detect the opening method.

閉塞部材は、バール孔を鉄蓋の裏面にて完全に閉塞可能な大きさと形状を有し、バール孔の開口内に位置する閉塞部材の上部に開閉工具を受け止める突状部分を有し、かつ、突状部分の鉄蓋の周縁部側に、開閉工具の内方移動を止める外向きの凹段部を有しており、さらに、弾性手段によってバール孔を閉塞する方向へ付勢されていることが望ましい。突状部分はバール孔に余裕をもって収まり、かつ、上に突き出さないものとする。   The closing member has a size and a shape capable of completely closing the burl hole on the back surface of the iron lid, and has a protruding portion for receiving the opening / closing tool on the upper portion of the closing member located in the opening of the burr hole, and The protrusion has an outwardly recessed step portion that stops the inward movement of the opening / closing tool on the peripheral edge side of the iron lid, and is further biased in a direction to close the burl hole by an elastic means. It is desirable. It is assumed that the protruding portion fits in the burl hole with sufficient margin and does not protrude upward.

ロック部材は外方を向いたロック部を有し、ロック部は受け枠の内方に設けられた内突部の下方に位置してロック状態となり、上記内突部よりも内方に移動してアンロック状態となり、閉塞部材に対して開閉工具による操作がなされてバール孔の開口が開いても、ロック状態を維持するように、閉塞部材に対してロック部材が独立的に配置されていることが望ましい。   The lock member has a lock portion facing outward, and the lock portion is positioned below the inner protrusion provided on the inner side of the receiving frame to be locked, and moves inward from the inner protrusion. The locking member is independently arranged with respect to the closing member so that the locked state is maintained even if the opening of the burl hole is opened by the opening / closing tool being opened with respect to the closing member. It is desirable.

本発明は以上のように構成されかつ作用するものであるから、初期荷重による食い込みの解除と、超過荷重による過度の食い込みの解除を、1個の開閉工具を用いた一連の操作で支障なく行うことができるとともに、バール孔の閉塞部材と鉄蓋の裏面との間に小石等が挟み込まれても、ロック機構が簡単には解除されず安全性の高い地下構造物用鉄蓋におけるテーパー嵌合解除装置を提供することができる。また、本発明によれば、1個の開閉工具を用いた一連の開蓋操作において、左右へ傾けるという通常とは異なる操作を必要とすることにより、開蓋方法を察知され難くより安全性の高い地下構造物用鉄蓋におけるテーパー嵌合解除装置を提供することができるという効果を奏する。   Since the present invention is configured and operates as described above, the release of the bite due to the initial load and the release of the excessive bite due to the excess load are performed without any trouble by a series of operations using one open / close tool. In addition, even if pebbles or the like are sandwiched between the clogging member of the burr hole and the back of the iron lid, the locking mechanism is not released easily and the taper fits in the iron lid for underground structures with high safety A release device can be provided. In addition, according to the present invention, in a series of opening operations using a single opening / closing tool, a different operation of tilting to the left and right is required, which makes it difficult to detect the opening method. There exists an effect that the taper fitting cancellation | release apparatus in the iron cover for high underground structures can be provided.

以下図示の実施形態を参照して本発明をより詳細に説明する。図1は本発明に係るテーパー嵌合解除装置を適用した地下構造物用鉄蓋の一例を示す縦断面図であり、図中、11は鉄蓋、12はその受け枠であって、鉄蓋11と受け枠12とは、鉄蓋11の外周面と受け枠12の内周面がテーパー嵌合による食い込みを生じるように、垂線に対して例えば8〜10度の急傾斜角度で面接触する構成を有している。図示の地下構造物用鉄蓋は円形鉄蓋であり、その円の直径方向に相当する位置の一端側に蝶番金具13と蝶番受け14から成る蝶番装置15を具備し、他端側に本発明に係るテーパー嵌合解除装置10とロック装置16を具備している。   Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments. FIG. 1 is a longitudinal sectional view showing an example of an iron cover for an underground structure to which a taper fitting release device according to the present invention is applied. In the figure, 11 is an iron cover, 12 is a receiving frame thereof, 11 and the receiving frame 12 are in surface contact at a steep inclination angle of, for example, 8 to 10 degrees with respect to the perpendicular so that the outer peripheral surface of the iron lid 11 and the inner peripheral surface of the receiving frame 12 are bitten by taper fitting. It has a configuration. The iron cover for an underground structure shown in the figure is a circular iron cover, and is provided with a hinge device 15 including a hinge fitting 13 and a hinge receiver 14 on one end side at a position corresponding to the diameter direction of the circle, and the present invention on the other end side. The taper fitting release device 10 and the locking device 16 are provided.

図2は、上記地下構造物用鉄蓋の鉄蓋11を示す平面図であり、本発明の装置10及び蝶番装置15は、夫々の符号で示した位置の裏面に配置されている。図2は、本発明に係る後述のバール孔24とともに、こじり穴17を2か所設けたことも示している。これらのこじり穴17は、万一、本発明の装置10で食い込みが解除できなかった場合に対処するもので、超過荷重におけるテーパー嵌合による食い込みの解除に用いることを目的としている。こじり穴17は、受け枠12の上端を支点として鉄蓋11の裏面に開閉工具18をあてがい、こじ開けるので凹構造を持っているが非貫通状であり、雨水を侵入させる恐れはない。なお、図示の開閉工具18は、その先端部18aがほぼT字型に設けられており、かつまた、図4等にあらわれた平面形状においても、図7等にあらわれた側面形状においてもテーパー形状に形成されていることが分かるであろう。   FIG. 2 is a plan view showing the iron cover 11 of the iron cover for an underground structure, and the device 10 and the hinge device 15 of the present invention are arranged on the back surface at the positions indicated by the respective symbols. FIG. 2 also shows that two twist holes 17 are provided along with a burl hole 24 to be described later according to the present invention. These prying holes 17 deal with a case where the biting cannot be released by the device 10 of the present invention, and are intended to be used for releasing the biting due to the taper fitting in the overload. The prying hole 17 has a concave structure because the opening / closing tool 18 is applied to the back surface of the iron lid 11 with the upper end of the receiving frame 12 as a fulcrum, so that it has a concave structure, but there is no risk of rainwater entering. Note that the opening / closing tool 18 shown in the figure has a tip portion 18a that is substantially T-shaped, and also has a tapered shape in both the planar shape shown in FIG. 4 and the side surface shown in FIG. You will see that it is formed.

本発明の装置では、開閉工具18を挿入可能なバール孔19を、鉄蓋11の周縁部よりも内方、しかし、内方に入り込み過ぎない位置に貫通状に設ける。即ち、バール孔19の設置位置は、後述するロック部材25の係合突部26に対する開閉工具18の操作をも考慮して決定されるので、その位置は上記係合突部26に近く、鉄蓋11の周縁部から内方へ離れ過ぎない位置になる。そして、バール孔19には、その開口を開閉可能に閉塞するために閉塞部材20を鉄蓋11の裏面に装着する。閉塞部材20は、上記貫通状のバール孔19の閉塞を目的として、付勢手段21であるばねにより閉方向へ付勢されており、切り欠き状のバール孔では期待できない閉塞効果を発揮する。図示のバール孔19は、外方が方形、内方は円形鉄蓋11の半径方向に長い平面形状を有しており(図3参照)、開閉工具18の先端部18aの長さと同程度の長さの開口形態に設定されている。   In the apparatus of the present invention, the burl hole 19 into which the opening / closing tool 18 can be inserted is provided in a penetrating manner at a position inward of the peripheral portion of the iron lid 11 but not excessively inward. That is, the installation position of the burr hole 19 is determined in consideration of the operation of the opening / closing tool 18 with respect to the engagement protrusion 26 of the lock member 25 described later, so that the position is close to the engagement protrusion 26 and the iron The position is not too far away from the periphery of the lid 11 inward. Then, a closing member 20 is attached to the back surface of the iron lid 11 in the burl hole 19 in order to close the opening so as to be openable and closable. The closing member 20 is urged in the closing direction by a spring as the urging means 21 for the purpose of closing the penetrating burl hole 19, and exhibits a blocking effect that cannot be expected with a notched burl hole. The burl hole 19 shown in the figure has a planar shape that is square on the outside and long on the inside in the radial direction of the circular iron lid 11 (see FIG. 3), and is about the same as the length of the tip 18 a of the opening / closing tool 18. It is set to the opening form of length.

上記バール孔19は、鉄蓋11の裏面に接触して完全に閉塞可能な大きさと形状の基板部を有している閉塞部材20によって閉塞され、その閉塞部材20の、バール孔19の開口内に位置する上部には、開閉工具18の先端部18aを受け止める突状部分20aを有し、また、突状部分20aは、開閉工具18の内方移動を止める外向きの凹段部20bを有している。閉塞部材20はその基板部の周縁部にて鉄蓋11の裏面に形成した座面11aに当接し、また、バール孔19を閉塞した状態において突状部分20aがバール孔19の内部に余裕をもって収まり、かつ、上に突き出さないように設けられている。   The burl hole 19 is closed by a closing member 20 having a substrate portion having a size and shape that can be completely closed by contacting the back surface of the iron lid 11, and the inside of the opening of the burl hole 19 of the closing member 20. The upper portion located at the upper portion has a protruding portion 20a for receiving the tip 18a of the opening / closing tool 18, and the protruding portion 20a has an outwardly recessed step portion 20b for stopping the inward movement of the opening / closing tool 18. is doing. The closing member 20 comes into contact with the seat surface 11 a formed on the back surface of the iron lid 11 at the peripheral edge of the substrate portion, and the protruding portion 20 a has a margin in the inside of the burr hole 19 in a state where the burl hole 19 is closed. It is provided so as to fit and not protrude upward.

上記の閉塞部材20は、リンク機構を用いて、バール孔19を開閉可能に閉塞する構成を有している。図示のリンク機構は、2個のリンク部材22、23から成る平行リンクを構成しており、その先端部22a、23aは閉塞部材20の下片20cに軸支され、基端部22b、23bにて取り付け金具24に軸支されている。従って、開閉工具18により閉塞部材20が加圧されると、閉塞部材20はバール孔19を閉塞した状態から鉄蓋11の内方かつ下方へ一定の姿勢を保って移動する。なお、取り付け金具24は、鉄蓋11の裏面に設けられた保持部11bに取り付けられている(図4、図5参照)。   The closing member 20 has a structure that closes the burl hole 19 so that it can be opened and closed using a link mechanism. The illustrated link mechanism forms a parallel link composed of two link members 22 and 23, and the distal end portions 22a and 23a are pivotally supported by the lower piece 20c of the closing member 20 and are connected to the base end portions 22b and 23b. And is pivotally supported by the mounting bracket 24. Therefore, when the closing member 20 is pressurized by the opening / closing tool 18, the closing member 20 moves from the state in which the burl hole 19 is closed to the inside and below the iron lid 11 while maintaining a certain posture. Note that the mounting bracket 24 is attached to the holding portion 11b provided on the back surface of the iron lid 11 (see FIGS. 4 and 5).

鉄蓋11の裏面には、前述のロック部材25が、鉄蓋11の裏面に設けられた一対の支軸部25a、25aにより、保持部11cに回転可能に軸支されている。図示のロック部材25は、ほぼU字型の正面形状を有し、その上部に左右側方を向けて一対の支軸部25a、25aを設け、また、正面前側には外方を向けた一対のロック部25b、25bが設けられている(図6参照)。上記支軸部25a、25aによりロック部材25が吊り下げられた状態では、ロック部25b、25bが受け枠12の内方に設けられた内突部27の下方に位置してロック状態となり、上記内突部27より内方に移動したときにアンロック状態となる。   On the back surface of the iron lid 11, the aforementioned lock member 25 is rotatably supported by the holding portion 11 c by a pair of support shaft portions 25 a and 25 a provided on the back surface of the iron lid 11. The illustrated locking member 25 has a substantially U-shaped front shape, and is provided with a pair of support shaft portions 25a, 25a facing the left and right sides at the upper portion thereof, and a pair of outward facing the front front side. Lock portions 25b and 25b are provided (see FIG. 6). In a state in which the lock member 25 is suspended by the support shaft portions 25a and 25a, the lock portions 25b and 25b are positioned below the inner protrusion 27 provided on the inner side of the receiving frame 12 to be in a locked state. When it moves inward from the inner protrusion 27, it becomes unlocked.

ロック部材25は、前述の一対の係合突部26、26を一体に具備している。その係合突部26、26は、上記ロック部材25の閉塞部材20の左右側方に、上部に外方へ向けて突出するように設けた配置を取るものとする。この配置によって、係合突部26、26はバール孔19から直に目視し難い位置を占め、かつ、ロック部材25を閉塞部材20に対して独立的に作動可能である。また、係合突部26、26は、ロック部材25が吊り下げられている状態において、係合突部26、26と内突部27の上面との間に所要のスペース28を設ける角度で設定されている。この角度設定により、開閉工具18によって係合突部26が加圧されロック部材25が回転移動すると、上記受け枠12の内突部27の内縁部に接触可能になり、かつまた、その状態になればそれ以上押し下げられることはなく、また、ロック部25bは内方へ後退してアンロック状態を維持する。   The lock member 25 is integrally provided with the pair of engaging protrusions 26 and 26 described above. The engagement protrusions 26 and 26 are arranged on the left and right sides of the closing member 20 of the lock member 25 so as to protrude outward from the upper part. With this arrangement, the engaging projections 26, 26 occupy a position that is difficult to see directly from the burr hole 19, and the lock member 25 can be independently operated with respect to the closing member 20. Further, the engagement protrusions 26 and 26 are set at an angle that provides a required space 28 between the engagement protrusions 26 and 26 and the upper surface of the inner protrusion 27 in a state where the lock member 25 is suspended. Has been. With this angle setting, when the engagement protrusion 26 is pressurized by the opening / closing tool 18 and the lock member 25 rotates, the inner edge of the inner protrusion 27 of the receiving frame 12 can be contacted, and in this state. If it becomes, it will not be pushed down any more, and the lock part 25b will retreat inward, and will maintain an unlocked state.

ロック部材25はほぼU字型の正面形状を有しているが、U字の間の空所29は、開閉工具18の先端部18aを縦方向にして挿入可能な大きさを有する。また、先端部18aを横方向にしたとき、先端部18aが、両方の係合突部26、26に同時に接触する関係に設けられていることも必要である。このように開閉工具18の先端部18aは、一対の係合突部26、26の間隔よりもやや長く、バール孔19の長さと同程度の長さに設定されている。   The lock member 25 has a substantially U-shaped front shape, but the space 29 between the U-shapes has a size that can be inserted with the distal end portion 18a of the opening / closing tool 18 in the vertical direction. Further, when the tip end portion 18a is set in the horizontal direction, the tip end portion 18a needs to be provided in such a relationship as to be in contact with both the engaging protrusions 26 and 26 simultaneously. As described above, the tip end portion 18 a of the opening / closing tool 18 is set to be slightly longer than the distance between the pair of engaging protrusions 26, 26, and to the same length as the length of the burl hole 19.

上記の内突部27は内向きの突状構造として、受け枠12の内周に環状に設けられるのであるから、既存のものを利用して設けることも可能である。27aはロックガイド部を示しており、内突部27の上面に内方が低くなる傾斜面から成り、閉蓋時に自動的にロック状態になるようにロック部材25を誘導する。27bはロック部材押さえ金具を示す。   Since the inner protrusion 27 is provided in an annular shape on the inner periphery of the receiving frame 12 as an inward protruding structure, it can also be provided using an existing one. Reference numeral 27a denotes a lock guide portion, which is composed of an inclined surface that is lowered inward on the upper surface of the inner protrusion 27, and guides the lock member 25 so that the lock member 25 is automatically locked when the lid is closed. Reference numeral 27b denotes a lock member pressing metal fitting.

このように構成された本発明に係るテーパー嵌合解除装置10では、鉄蓋11がその受け枠12に受け止められ、テーパー嵌合による食い込みを生じているが、その食い込みの解除と鉄蓋11を開ける操作を、1個の開閉工具18を用いた一連の開蓋操作によって円滑に行うことができる。その手順は図8以下に図示されている。最初に、開閉工具18の先端部18aをバール孔19の長手方向に合わせ、かつ、付勢手段21の付勢力を受けてバール孔19を閉塞している、閉塞部材25に斜めに先端部18aを当てるようにし、バール孔19の内部に挿入する(図8A)。上記先端部18aに対して短めに形成したバール孔19に開閉工具18の先端部18aを挿入するための操作であり、バール孔19に挿入したなら、先端部18aを水平に直す(図8B)。   In the taper fitting release device 10 according to the present invention configured as described above, the iron lid 11 is received by the receiving frame 12 and the bite is caused by the taper fitting. The opening operation can be smoothly performed by a series of opening operations using a single opening / closing tool 18. The procedure is illustrated in FIG. First, the front end 18a of the opening / closing tool 18 is aligned with the longitudinal direction of the burl hole 19 and the burr hole 19 is closed by receiving the urging force of the urging means 21. And is inserted into the burl hole 19 (FIG. 8A). This is an operation for inserting the tip end portion 18a of the opening / closing tool 18 into the burl hole 19 formed shorter than the tip end portion 18a. When the tip end portion 18a is inserted into the burl hole 19, the tip end portion 18a is corrected horizontally (FIG. 8B). .

次いで、開閉工具18をその軸周りに90度回転させ(図9A)、さらに開閉工具18を鉄蓋11の内方へやや傾け気味に操作する。この操作で、開閉工具18は、その先端部18aの両端にてロック部材25の一対の係合突部26、26に当接し、加圧する状態となる。即ち、それまでは閉塞部材20のみに当接し、ロック部材25とは接触していなかった先端部18aが係合突部26に接触するとともに、内方へロック部材26を押圧するので、そのロック部25bが受け枠12の内突部27の下方に位置したロック状態から内方へ押し動かされ、アンロック状態とすることができる(図9B)。この状態における開閉工具18の先端部18aとロック部材25の係合突部26、26との関係は、XIIA−XIIA線断面として図12Aにも示されており、同図によれば係合突部26、26が内突部27に当接しており、先端部18aがテーパー状の下部で係合突部26、26に当たっており、上部では鉄蓋11の座面11aに当たっていることが分かる。   Next, the open / close tool 18 is rotated 90 degrees around its axis (FIG. 9A), and the open / close tool 18 is operated slightly tilted inward of the iron lid 11. By this operation, the opening / closing tool 18 comes into contact with and pressurizes the pair of engaging protrusions 26 and 26 of the lock member 25 at both ends of the tip end portion 18a. That is, since the tip 18a that has been in contact with only the closing member 20 and has not been in contact with the locking member 25 contacts the engaging protrusion 26 and presses the locking member 26 inwardly, The portion 25b is pushed inward from the locked state positioned below the inner protrusion 27 of the receiving frame 12 to be in an unlocked state (FIG. 9B). The relationship between the tip 18a of the opening / closing tool 18 and the engaging protrusions 26, 26 of the lock member 25 in this state is also shown in FIG. 12A as a cross section taken along the line XIIA-XIIA. It can be seen that the portions 26, 26 are in contact with the inner protrusion 27, the tip end 18 a is in contact with the engagement protrusions 26, 26 at the tapered lower portion, and the upper portion is in contact with the seat surface 11 a of the iron lid 11.

ここで、開閉工具18の操作方向を図9に示したこれまでの、鉄蓋11の中心を通る線上に沿った方向での操作方向から90度変更し、上記鉄蓋11の中心を通る線方向を基準として開閉工具18を左右へ傾ける操作を行う。この操作によって生じる開閉工具18の先端部18aとロック部材25の係合突部26、26との関係は、XIIB−XIIB線の断面図として図12Bに示されている。即ち、開閉工具18を傾斜させることにより、先端部18aはその一方のみが点30にて一方の係合突部26に当接し、先端部18aの他方は点31にて鉄蓋裏面の座面11aに当接する。従って、開閉工具18の操作部を力点、点30を支点、点31を作用点とする梃子作用により、テーパー嵌合により生じている食い込みを解除することができる(図10A)。   Here, the operation direction of the opening / closing tool 18 is changed by 90 degrees from the operation direction in the direction along the line passing through the center of the iron lid 11 shown in FIG. An operation of tilting the open / close tool 18 to the left and right with respect to the direction is performed. The relationship between the front end 18a of the opening / closing tool 18 and the engagement protrusions 26, 26 generated by this operation is shown in FIG. 12B as a cross-sectional view taken along the line XIIB-XIIB. That is, by tilting the opening / closing tool 18, only one end of the tip end portion 18a comes into contact with one engaging projection 26 at a point 30, and the other end tip portion 18a is a seating surface on the back surface of the iron lid at a point 31. 11a abuts. Therefore, the biting caused by the taper fitting can be released by the lever action with the operating portion of the open / close tool 18 as the force point, the point 30 as the fulcrum, and the point 31 as the action point (FIG. 10A).

テーパー嵌合による食い込みが解除されることで、鉄蓋11を容易に動かすことができるようになるので、開閉工具18を受け枠12の外方に引きながら持ち上げることによって(図10B)、アンロック状態にある鉄蓋11が開かれ、ここに開蓋操作を完了することができる。なお、図11は開蓋操作の最終段階であり、ロック部材25のロック部25bが内突部27の内方を迂回し、鉄蓋11を持ち上げられる状態を示しており、この後、鉄蓋11は蝶番装置15を中心として表裏反転され開蓋状態となる。開蓋状態での作業を終えて、再び鉄蓋11を閉じるときには、蝶番装置15を中心として鉄蓋11を回転し受け枠12にテーパー嵌合させることになり、その際ロック部材25が内突部27を通過するが、その過程においてロック部25bはロックガイド部27aの傾斜面に沿って誘導され、その下方に位置してロック状態となる。   Since the iron lid 11 can be easily moved by releasing the bite by the taper fitting, the unlocking tool 18 is unlocked by lifting it while pulling it outward from the receiving frame 12 (FIG. 10B). The iron lid 11 in the state is opened, and the lid opening operation can be completed here. FIG. 11 shows the final stage of the lid opening operation, and shows a state where the lock portion 25b of the lock member 25 bypasses the inside of the inner protrusion 27 and the iron lid 11 can be lifted. 11 is reversed with the hinge device 15 as the center and the lid is opened. When the iron lid 11 is closed again after the operation in the opened state, the iron lid 11 is rotated around the hinge device 15 to be taper-fitted to the receiving frame 12, and the lock member 25 is indented at that time. In this process, the lock portion 25b is guided along the inclined surface of the lock guide portion 27a, and is positioned below the lock portion 25b to be locked.

かくして、本発明の装置10では閉塞部材20とロック部材25が連動せず独立的に作動するので、閉塞部材20が操作されてもロック部材25はそのロック状態を維持することができる。また、開閉工具18はその先端部18aの一部でロック部材25に当接しながら、同じ先端部18aの他部で鉄蓋11の裏面に当接するので、開蓋工具18を左右へ傾ける操作力で鉄蓋をこじ開け、テーパー嵌合を解除することができる。よって、本発明の装置10によればテーパー嵌合による軽度の食い込みは勿論のこと、過度の食い込みが生じていても1個の開閉工具18を用いた一連の開蓋操作により、スムーズに開蓋作業を行うことができる。   Thus, in the apparatus 10 of the present invention, the closing member 20 and the locking member 25 operate independently without being interlocked, so that the locking member 25 can maintain the locked state even when the closing member 20 is operated. Further, the opening / closing tool 18 abuts against the lock member 25 at a part of the front end portion 18a, and abuts against the back surface of the iron lid 11 at the other end of the same front end portion 18a. With this, you can pry open the iron lid and release the taper fit. Therefore, according to the apparatus 10 of the present invention, it is possible to smoothly open the cover by a series of opening operations using one open / close tool 18 as well as slight biting by taper fitting, even if excessive biting occurs. Work can be done.

本発明に係るテーパー嵌合解除装置を適用した地下構造物用鉄蓋の一例を示す縦断面図である。It is a longitudinal cross-sectional view which shows an example of the iron lid | cover for underground structures to which the taper fitting cancellation | release apparatus which concerns on this invention is applied. 同上の装置の鉄蓋の一例を示す平面図である。It is a top view which shows an example of the iron cover of an apparatus same as the above. 同上におけるバール孔を拡大して示す平面図である。It is a top view which expands and shows the burl hole in the same as the above. 同上の装置を拡大して示す断面図である。It is sectional drawing which expands and shows an apparatus same as the above. 同じく開閉工具と鉄蓋の関係を示す下面図である。It is a bottom view which similarly shows the relationship between an opening / closing tool and an iron lid. 同上の装置を分解して示す斜視図である。It is a perspective view which decomposes | disassembles and shows an apparatus same as the above. 同じく鉄蓋を透視して組立状態を示す斜視図である。It is a perspective view which similarly shows through an iron lid and shows an assembly state. 同上の装置の作動を示すものでAは操作開始直前の状態、Bは開閉工具をバール孔に挿入した状態の説明図である。The operation | movement of an apparatus same as the above is shown, A is a state just before an operation start, B is explanatory drawing of the state which inserted the opening-and-closing tool in the burr hole. 同じくAは開閉工具を90度回転した状態、Bは開閉工具を内方へ傾けた状態の説明図である。Similarly, A is a state in which the opening / closing tool is rotated 90 degrees, and B is an explanatory view of a state in which the opening / closing tool is tilted inward. 同じくAは開閉工具の先端部を左右方向へ傾け食い込みを解除した状態、Bはさらに開閉工具を上方へ持ち上げつつある状態を示す説明図である。Similarly, A is a state in which the tip of the open / close tool is tilted in the left-right direction and the bite is released, and B is an explanatory view showing a state where the open / close tool is being lifted further upward. 開蓋操作の最終段階を示す断面図である。It is sectional drawing which shows the last stage of lid opening operation. Aは図9BのXIIA−XIIA線断面図であり、Bは図10AのXIIB−XIIB線断面図である。9A is a cross-sectional view taken along line XIIA-XIIA in FIG. 9B, and B is a cross-sectional view taken along line XIIB-XIIB in FIG. 10A.

10 テーパー嵌合解除装置
11 鉄蓋
12 受け枠
13 蝶番金具
14 蝶番受け
15 蝶番装置
16 ロック装置
17 こじり穴
18 開閉工具
19 バール孔
20 閉塞部材
21 付勢手段
22、23 リンク部材
24 取り付け金具
25 ロック部材
26 係合突部
27 内突部
28 スペース
29 空所
30 支点
31 作用点
DESCRIPTION OF SYMBOLS 10 Taper fitting cancellation | release apparatus 11 Iron cover 12 Receiving frame 13 Hinge bracket 14 Hinge receptacle 15 Hinge device 16 Locking device 17 Pinch hole 18 Opening / closing tool 19 Bar hole 20 Closure member 21 Energizing means 22, 23 Link member 24 Mounting bracket 25 Lock Member 26 engagement protrusion 27 inner protrusion 28 space 29 void 30 fulcrum 31 action point

Claims (4)

鉄蓋がその受け枠にテーパー嵌合による食い込みを生じて受け止められる地下構造物用鉄蓋において、開閉工具を用いて上記食い込みを解除するための装置であって、
開閉工具を挿入可能なバール孔を、鉄蓋の周縁部よりも内方の位置に貫通状に設けるとともに、上記バール孔を開閉可能に閉塞し、かつ、閉方向へ付勢された閉塞部材を鉄蓋の裏面に装着し、
上記閉塞部材に対して独立的に作動可能であり、受け枠の内周に設けられた内突部の下方に位置してロック状態となり、上記内突部の下方の位置よりも内方に移動してアンロック状態となるロック部材を鉄蓋の裏面に回転可能に装着し、
上記ロック部材は、閉塞部材を押し下げている開閉工具の先端部により加圧されてアンロック位置へ移動し、かつ、上記受け枠の内突部の上面に当接する係合突部をロック部材の上部に具備し、
テーパー嵌合による食い込みを解除する際、上記開閉工具の先端部をバール孔に挿入した状態で左右へ傾けることによって、上記先端部の一部がアンロック状態にあるロック部材の係合突部の上面に当接してそれ以上は押し下げられない状態となり、上記先端部の他部が鉄蓋の裏面に当接して鉄蓋を押し上げ、食い込みを解除するように構成された
地下構造物用鉄蓋におけるテーパー嵌合解除装置。
An iron lid for an underground structure in which an iron lid is caught by taper fitting in its receiving frame, and is an apparatus for releasing the above biting using an open / close tool,
A burr hole into which the open / close tool can be inserted is provided in a penetrating manner at a position inward of the peripheral portion of the iron lid, and the closing member that closes the burl hole so as to be openable and urged in the closing direction is provided. Attach to the back of the iron lid,
It can be operated independently with respect to the closing member, is positioned below the inner projection provided on the inner periphery of the receiving frame, is locked, and moves inward from a position below the inner projection. A lock member that is unlocked is attached to the back of the iron lid so that it can rotate,
The lock member is pressed by the tip of the opening / closing tool that pushes down the closing member and moves to the unlock position, and the engagement protrusion that contacts the upper surface of the inner protrusion of the receiving frame is moved to the lock member. At the top,
When releasing the bite due to the taper fitting, the tip of the opening / closing tool is tilted to the left and right with the burr hole inserted, so that the engagement protrusion of the lock member in which a part of the tip is unlocked. In the iron lid for an underground structure configured to abut on the upper surface and cannot be pushed down any more, and the other part of the tip is in contact with the back surface of the iron lid to push up the iron lid and release the bite. Taper mating release device.
バール孔の開口は鉄蓋の内外方向にやや長い形態を有し、係合突部はロック部材の上部、かつ、上記バール孔の開口範囲よりも側方にずれた位置に配置されている
請求項1記載の地下構造物用鉄蓋におけるテーパー嵌合解除装置。
The opening of the burl hole has a shape that is slightly longer in the inner and outer directions of the iron lid, and the engaging protrusion is arranged at the upper part of the lock member and at a position shifted laterally from the opening range of the burl hole. The taper fitting cancellation | release apparatus in the iron lid | cover for underground structures of claim | item 1.
閉塞部材は、バール孔を鉄蓋の裏面にて完全に閉塞可能な大きさと形状を有し、バール孔の開口内に位置する閉塞部材の上部に鉄蓋表面とほぼ同じ高さになる突状部分を有し、かつ、突状部分の鉄蓋の周縁側に、開閉工具の内方移動を止める外向きの凹段部を有しており、さらに、弾性手段によってバール孔を閉塞する方向へ付勢されている
請求項1記載の地下構造物用鉄蓋におけるテーパー嵌合解除装置。
The closing member has a size and shape that can completely close the burl hole on the back surface of the iron lid, and a protruding shape that is almost the same height as the iron lid surface on the top of the closing member located in the opening of the burr hole And has an outwardly recessed step for stopping the inward movement of the opening / closing tool on the peripheral side of the iron lid of the protruding portion, and further in a direction to close the burl hole by elastic means The taper fitting cancellation | release apparatus in the iron cover for underground structures of Claim 1 currently urged | biased.
ロック部材は外方を向いたロック部を有し、ロック部が受け枠の内方に設けられた内突部の下方に位置してロック状態となり、上記内突部よりも内方に移動してアンロック状態となり、閉塞部材に対して開閉工具による操作がなされてバール孔の開口が開いても、ロック状態を維持するように、閉塞部材に対してロック部材が独立的に配置されている
請求項1記載の地下構造物用鉄蓋におけるテーパー嵌合解除装置。
The lock member has a lock portion facing outward, and the lock portion is positioned below the inner protrusion provided on the inner side of the receiving frame to be locked, and moves inward from the inner protrusion. The locking member is independently arranged with respect to the closing member so that the locked state is maintained even if the opening of the burl hole is opened by the opening / closing tool being opened with respect to the closing member. The taper fitting cancellation | release apparatus in the iron cover for underground structures of Claim 1.
JP2011061287A 2011-03-18 2011-03-18 Taper mating release device for iron cover for underground structure Active JP4763098B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06264463A (en) * 1993-03-10 1994-09-20 Nippo Kinzoku Kogyo Kk Locking device of manhole iron cover
JP2001262893A (en) * 2000-03-15 2001-09-26 Nippon Chutetsukan Kk Locking device for iron cover
JP2007023672A (en) * 2005-07-20 2007-02-01 Roppo Sangyo Kk Steel lid device
JP2007100295A (en) * 2005-09-30 2007-04-19 License & Property Control:Kk Structure for releasing digging in of lid for underground structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06264463A (en) * 1993-03-10 1994-09-20 Nippo Kinzoku Kogyo Kk Locking device of manhole iron cover
JP2001262893A (en) * 2000-03-15 2001-09-26 Nippon Chutetsukan Kk Locking device for iron cover
JP2007023672A (en) * 2005-07-20 2007-02-01 Roppo Sangyo Kk Steel lid device
JP2007100295A (en) * 2005-09-30 2007-04-19 License & Property Control:Kk Structure for releasing digging in of lid for underground structure

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