JP3437825B2 - Fall prevention device for underground structures - Google Patents
Fall prevention device for underground structuresInfo
- Publication number
- JP3437825B2 JP3437825B2 JP2000245336A JP2000245336A JP3437825B2 JP 3437825 B2 JP3437825 B2 JP 3437825B2 JP 2000245336 A JP2000245336 A JP 2000245336A JP 2000245336 A JP2000245336 A JP 2000245336A JP 3437825 B2 JP3437825 B2 JP 3437825B2
- Authority
- JP
- Japan
- Prior art keywords
- fall prevention
- latching
- opening
- receiving frame
- latching member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、網状ないし格子状
の構造を有し、地下構造物等の蓋受け枠の開口内に取り
付けて人の転落等を防止可能な転落防止体を有する装置
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device having a net-like or lattice-like structure and having a fall-preventing member which can be installed in an opening of a lid receiving frame of an underground structure or the like to prevent a person from falling. It is a thing.
【０００２】[0002]
【従来の技術】マンホールの開口に人が転落する事故を
防止するための設備、装置類は公知であるが、いまだ工
夫、改良を必要とする点は少なくない。例えば、実開平
６−１４２３８号のものは本体をシャックルのような接
続手段によって蓋受枠に取り付けるために、着脱の作業
性が良くないという問題がある。また実用新案登録第２
５４９８２２号のものは、蓋受け枠の一部に当接する係
合部材としてボルトを使用しているためやはり着脱性は
良くない。2. Description of the Related Art Equipment and devices for preventing accidents of a person falling into the opening of a manhole are known, but there are still many points that need to be devised and improved. For example, in Japanese Utility Model Laid-Open No. 6-14238, since the main body is attached to the lid receiving frame by a connecting means such as a shackle, the workability of attachment and detachment is not good. The utility model registration second
No. 549822 uses a bolt as an engaging member that abuts against a part of the lid receiving frame, and therefore, the detachability is not good.
【０００３】これに対し、特開平１０−３３８９４２号
のものは受枠の取付座に着脱可能に係止される転落防止
蓋を有するので、着脱性は良い。しかしながらその転落
防止蓋の係止は取付座の突起に切欠部分を嵌合させるだ
けであるから、取り付けやすいかわりに外れやすいもの
となり、特に断熱蓋を下方に連絡しているため、内圧の
上昇や水圧によって浮上し外れてしまうという問題があ
る。なおシャックルやボルトなどの小物は紛失の機会も
多い。On the other hand, the one disclosed in Japanese Patent Laid-Open No. 10-338942 has a fall-preventing lid that is detachably locked to the mounting seat of the receiving frame, so that the detachability is good. However, since the fall prevention lid is locked only by fitting the notch to the projection of the mounting seat, it becomes easy to remove instead of being easy to attach. There is a problem that it floats off due to water pressure. Small items such as shackles and bolts are often lost.
【０００４】[0004]
【発明が解決しようとする課題】本発明は前記の点に着
目してなされたもので、その課題は蓋受け枠に対する着
脱が容易であるのみならず、内圧の上昇等によっては外
れるおそれのない地下構造物等への転落防止装置を提供
することである。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and the problem is not only that it can be easily attached to and detached from a lid receiving frame, but that it is not likely to come off due to an increase in internal pressure or the like. to provide a fall prevention device for underground structures, and the like.
【０００５】[0005]
【課題を解決するための手段】前記の課題を解決するた
め本発明は、蓋受け枠の開口内に形成されているステッ
プ等の突出部に上方又は下方から掛け止める第１の掛け
止め部材を転落防止体に設けるとともに、突出部に下方
又は上方から掛け止めるロック部材を掛け止め方向及び
逆方向へ移動可能に第１の掛け止め部材又はその近傍に
設け、蓋受け枠の開口内に入り込んで抜け止めとなる第
２の掛け止め部材を第１の掛け止め部材から離れた位置
の転落防止体に設け、転落防止体の上面に、融雪防止用
の断熱板を弱い固定手段によって着脱容易に取り付けた
ものである。In order to solve the above-mentioned problems, the present invention provides a first latching member which is latched from above or below to a projecting portion such as a step formed in an opening of a lid receiving frame. In addition to being provided on the fall prevention body, a lock member that locks the protrusion from below or above is provided in the first latching member or in the vicinity thereof so as to be movable in the latching direction and the opposite direction, and enters the opening of the lid receiving frame. A second retaining member serving as a retaining member is provided on the fall prevention member at a position distant from the first retaining member, and the upper surface of the fall prevention member is for preventing snow melting.
The heat insulating plate is attached easily by a weak fixing means .
【０００６】[0006]
【発明の実施の形態】本発明の転落防止装置は、人の転
落等を防止するために地下構造物等の蓋受け枠の開口内
に取り付けるもので、一般的に網状ないし格子状の構造
を持った転落防止体を有している。蓋受け枠は、人の出
入りが可能な場合にはマンホールと呼ばれそれ以外には
開口などと呼ばれる開口部分を有し、通常この部分は鉄
蓋によって閉じられている。BEST MODE FOR CARRYING OUT THE INVENTION The fall prevention device of the present invention is to be installed in an opening of a lid receiving frame of an underground structure or the like in order to prevent a person from falling, and generally has a net-like or lattice-like structure. It has a fall prevention body. The lid receiving frame has an opening portion called a manhole when a person can go in and out, and an opening other than the manhole, and this portion is usually closed by an iron lid.
【０００７】その蓋受け枠の開口内に形成されているス
テップ等の突出部に対して、上方又は下方から掛け止め
る第１の掛け止め部材が転落防止体に設けられる。第１
の掛け止め部材は転落防止体を蓋受け枠に結合する手段
の一つであり、結合の相手としてステップ等の突出部が
利用される。この突出部には下方又は上方からロック部
材が掛け止め可能とされる。つまり、第１の掛け止め部
材が突出部の上方にあるケースではロック部材は突出部
の下方に置かれ、第１の掛け止め部材を突出部の下方に
配置したときはロック部材を突出部の上方に配置して突
出部を上方から挟み、転落防止体が外れないようにした
構成である。A first latching member for latching the protrusion such as a step formed in the opening of the lid receiving frame from above or below is provided in the fall prevention body. First
The latching member is one of means for coupling fall prevention part frame receiving the lid, the projecting portions such as the scan STEP is used as a binding partner. A lock member can be hooked on the protrusion from below or above. That is, in the case where the first latching member is above the protrusion, the lock member is placed below the protrusion, and when the first latching member is arranged below the protrusion, the lock member is placed above the protrusion. It is arranged so that the protrusion is sandwiched from above so that the fall prevention body does not come off.
【０００８】従ってロック部材は、掛け止め方向及び逆
方向へ移動可能に第１の掛け止め部材又はその近傍に設
けられる。また、ロック部材には掛け止め方向へばねな
どによって常時付勢力を加えたものとすることができ
る。ロック部材の掛け止め操作を忘れることがないし、
不意に外れるおそれもないからである。Therefore, the lock member is provided at or near the first latch member so as to be movable in the latch direction and the opposite direction. Further, the lock member may be constantly biased by a spring or the like in the latching direction. Never forget to lock the lock member,
This is because there is no danger of it coming off unexpectedly.
【０００９】さらに転落防止体には、第１の掛け止め部
材とともに抜け止めを行う第２の掛け止め部材が第１の
掛け止め部材からは離れた位置の転落防止体に設けられ
る。第２の掛け止め部材は蓋受け枠の開口内に設けられ
ている凹部に入り込んで上下方向への抜け止めを成す。
互いに離れて配置される第１及び第２の掛け止め部材の
配置関係で内外方向の抜け止めが成される。Further, the fall-prevention body is provided with a second hook-stop member for preventing the slip-off together with the first hook-stop member, at a position apart from the first hook-stop member. The second latching member enters the recessed portion provided in the opening of the lid receiving frame to prevent the stopper from being vertically pulled out.
The first and second latch members that are spaced apart from each other are arranged to prevent the retainer members from moving inward and outward.
【００１０】転落防止体の上面には、断熱板を弱い固定
手段によって着脱容易に取り付けることができる。断熱
板は、黒色の鉄蓋の熱伝導率を低下させて部分的融雪を
防止するために用いられる。また、弱い固定手段、とは
例えば突起と嵌まり合える溝や孔などで弱い力によって
簡単に外される引っ掛かっている程度のものの固定力を
指す。A heat insulating plate can be easily attached and detached to the upper surface of the fall prevention body by a weak fixing means. The heat insulating plate is used to reduce the thermal conductivity of the black iron lid and prevent partial snow melting. Further, the weak fixing means refers to a fixing force of a groove or a hole which can be fitted with a protrusion and which is easily removed by a weak force and is caught.
【００１１】[0011]
【実施例】以下、図示の実施例を参照して本発明をより
詳細に説明する。図１は地下構造物の蓋受け枠１０、転
落防止体１１及び断熱板１２を分解状態で示したもので
ある。蓋受け枠１０は開口１３の内方に突出するステッ
プ或いは手掛けなどと称される突出部１４を左右一対有
しており、かつまた内側には略全周に亘る凹部１５を有
している（図５参照）。The present invention will be described in more detail below with reference to the illustrated embodiments. FIG. 1 shows the lid receiving frame 10, the fall prevention body 11, and the heat insulating plate 12 of the underground structure in a disassembled state. The lid receiving frame 10 has a pair of left and right projecting portions 14 which are referred to as steps or handles which project inwardly of the opening 13, and also has a concave portion 15 which extends substantially all around the inside ( (See FIG. 5).
【００１２】転落防止体１１は、開口１３の略全域をカ
バーできる大きさ及び形状を有し、それ自体、人などの
荷重を支えられる強度を有している。図示の例では、突
出部１４を除く開口１３をカバーできる外形に金属で形
成された外枠１６と、それに張設された金網１７とから
成り、突出部１４に向いた外枠１６に第１の掛け止め部
材１８が取り付けられている。第１の掛け止め部材１８
は突出部１４に上方から掛け止められるように逆Ｌ字形
ないし？形の形状を有しており、第１の掛け止め部材１
８の下端にて転落防止体１１に取り付けられている。転
落防止体１１は枠と網とからではなく、金属棒材の折り
曲げや樹脂材料の加工により格子状に形成しても良い。The fall prevention body 11 has a size and shape capable of covering substantially the entire area of the opening 13 and has strength enough to support the load of a person or the like. In the illustrated example, an outer frame 16 formed of metal in an outer shape capable of covering the opening 13 excluding the protruding portion 14 and a wire net 17 stretched over the outer frame 16 are provided. The locking member 18 is attached. First latch member 18
Is an inverted L-shape so that it can be hooked onto the protrusion 14 from above? And have a shape of a shape, the first latching member 1
It is attached to the fall prevention body 11 at the lower end of 8. The fall prevention body 11 may be formed in a lattice shape by bending a metal rod or processing a resin material instead of forming the frame and the net.
【００１３】実施例のロック部材１９は、従って突出部
１４の下方にて抜け止めをする位置に設けられる。例示
のロック部材１９は図４に示されるように、掛け止め方
向へ及び逆方向へ移動可能に第１の掛け止め部材基部に
取り付けられ、かつ掛け止め方向へ突出するように圧縮
ばねで示された付勢手段２０の付勢力を受けている軸部
材２１と、その先端に取り付けられた回転可能なロック
部２２とを有する。ロック部２２は略コ字形に形成さ
れ、第１の掛け止め部材基部をまたいで先端が突出し、
内方へ移動させて９０度回転させると掛け止め部材基部
に先端が当たるので、第１の掛け止め部材１８は掛け外
し可能となる。[0013] Example of the locking member 19 is thus provided at a position you a retaining at lower protrusion 14. An exemplary locking member 19, as shown in FIG. 4, is movably attached to the first latching member base in the latching direction and in the opposite direction, and is shown as a compression spring so as to project in the latching direction. The shaft member 21 receives the biasing force of the biasing means 20 and the rotatable lock portion 22 attached to the tip thereof. The lock portion 22 is formed in a substantially U-shape, and the tip of the lock portion 22 extends over the base of the first latching member,
When it is moved inward and rotated by 90 degrees, the tip of the latch member base portion abuts, so that the first latch member 18 can be undocked.
【００１４】上記実施例とは逆に、第１の掛け止め部材
１８を突出部１４の下方に配置し、ロック部材１９を突
出部１４の上方に配置することは設計変更の範囲で容易
に成し得ることである。また突出部１４が左右に設けら
れているので、第１の掛け止め部材１８も夫々に掛け止
めるように一対設けた方が安定上好ましい。しかし、転
落防止体１１の外れ止めという目的からは、ロック部材
１９を左右一対設ける必要はなく、片方だけで足りる場
合もあり得る。Contrary to the above embodiment, it is easy to arrange the first latch member 18 below the protrusion 14 and the lock member 19 above the protrusion 14 within the scope of design changes. Is possible. Further, since the protrusions 14 are provided on the left and right, it is preferable in terms of stability to provide a pair of the first latching members 18 so as to latch the first latching members 18 respectively. However, for the purpose of preventing the fall prevention body 11 from coming off, it is not necessary to provide a pair of left and right lock members 19, and only one may be sufficient.
【００１５】第２の掛け止め部材２３は蓋受け枠１０の
前記凹部１５に入り込んで上下方向の抜け止めとなるも
ので、夫々第１の掛け止め部材１８から１８０度ほど離
れた位置、或いは隣接のものとの角度差では略９０度ほ
ど離れた位置に取り付けられている。第２の掛け止め部
材２３は凹部１５に入り込める逆Ｌ字形の端部２４を有
している（図５参照）。例示の端部２４は内方から見る
と略Ｔ字状とされ、第２の掛け止め部材２３の下端にて
転落防止体１１に取り付けられており、掛け止め安定性
の向上を図っている。The second retaining members 23 enter the recesses 15 of the lid receiving frame 10 to prevent the second retaining members 23 from coming off in the vertical direction. It is attached at a position about 90 degrees apart from the other. The second latch member 23 has an inverted L-shaped end 24 that can be inserted into the recess 15 (see FIG. 5). The illustrated end portion 24 has a substantially T-shape when viewed from the inside, and is formed at the lower end of the second latch member 23.
It is attached to the fall prevention body 11 to improve the stability of latching.
【００１６】上記した転落防止体１１の上面には、融雪
防止用の断熱板１２が配置される。断熱板１２は発泡性
樹脂を用いて形成した樹脂発泡体より成り、転落防止体
１１よりも広い範囲を覆う形態を有する。より広い範囲
を覆う部分２５は折り重ねる構造としても良い（図１参
照）。断熱板１２を弱い固定手段によって転落防止体上
面に着脱容易に取り付けるために、実施例のものは把手
を兼ねた突起２６と、突起２６を嵌め合わせるため断熱
板１２に形成した溝部２７、第１の掛け止め部材１８と
の抵触を考慮して形成した切り欠き状凹部２８を設けて
いる。A heat insulating plate 12 for preventing snow melting is arranged on the upper surface of the fall prevention body 11. The heat insulating plate 12 is made of a resin foam formed of a foaming resin, and has a form that covers a wider area than the fall prevention body 11. The portion 25 covering a wider area may have a folded structure (see FIG. 1). In order to easily attach the heat insulating plate 12 to the upper surface of the fall prevention body by weak fixing means, in the embodiment, the projection 26 also serves as a handle, and the groove portion 27 formed in the heat insulating plate 12 for fitting the projection 26, the first A notch-shaped recess 28 is formed in consideration of the contact with the latch member 18.
【００１７】例示の転落防止体１１は外枠１６の下部に
金網１７を張った構造を有するので金網上の空処を断熱
板１２の嵌め込みのために利用することができる（図
６、図７（ｂ）各参照）。この場合、断熱板１２と外枠
１６との嵌め込み摩擦力も弱い固定手段に該当する。Since the illustrated fall prevention member 11 has a structure in which a wire net 17 is stretched under the outer frame 16, a space on the wire net can be used for fitting the heat insulating plate 12 (FIGS. 6 and 7 (b)). ) See each). In this case, the fitting friction between the heat insulating plate 12 and the outer frame 16 also corresponds to a weak fixing means.
【００１８】故に本発明に係る転落防止装置は、第１の
掛け止め部材１８と第２の掛け止め部材２３とで蓋受け
枠１０に掛け止められた状態となる。ここで第１の掛け
止め部材１８にはロック部材１９が並設されており、第
１の掛け止め部材１８とロック部材１９とが突出部１４
の上下に位置する状態を取り、かつ第２の掛け止め部材
２３は開口１３の内面凹部１５に入り込んで上下に動か
ず、かつまた転落防止枠自体、開口の略全域をカバーで
きる大きさ及び形状であり、その転落防止体１１の外枠
１６に第１の掛け止め部材１８及び第２の掛け止め部材
２３が植立してある構成を有するために平面方向へ動く
ことができない。Therefore, the fall prevention device according to the present invention is in a state of being hooked on the lid receiving frame 10 by the first hooking member 18 and the second hooking member 23. Here, a lock member 19 is juxtaposed to the first latching member 18, and the first latching member 18 and the lock member 19 are provided with the protruding portion 14.
The second latching member 23 does not move up and down by entering the inner surface concave portion 15 of the opening 13, and also the fall prevention frame itself and the size and shape capable of covering substantially the entire area of the opening. In addition, since the first latching member 18 and the second latching member 23 are set up on the outer frame 16 of the fall-preventing body 11, they cannot move in the plane direction.
【００１９】また内圧上昇等により転落防止体１１に押
し上げ力が作用した場合、第１の掛け止め部材１８の部
分で蓋受け枠１０に繋ぎ止められているため内圧或いは
流体は転落防止体１１を通過する。このとき断熱板１２
は弱い固定手段によって取り付けられているだけである
から、転落防止体１１から分離してしまい、圧力や流れ
をせき止めてしまうようなこともない。When a push-up force is applied to the fall prevention member 11 due to an increase in the internal pressure, the internal pressure or the fluid causes the fall prevention member 11 to be locked to the lid receiving frame 10 at the portion of the first latch member 18. pass. At this time, the heat insulating plate 12
Since it is only attached by weak fixing means, it is not separated from the fall prevention body 11 and does not block pressure or flow.
【００２０】[0020]
【発明の効果】本発明は以上の如く構成されかつ作用す
るものであるから、転落防止体を蓋受け枠へ取り付ける
作業がロック部材を扱うワンタッチ操作で可能であり、
取り外す作業も同様に容易であり、かつまたそうである
にも拘らず、内圧の上昇や溢流にある押し上げ力を受け
る非常事態下においても、転落防止体が外れる心配はな
く安全性が保たれるという効果を奏する。Since the present invention is constructed and operates as described above, the work of attaching the fall prevention body to the lid receiving frame can be performed by one-touch operation of handling the lock member.
The removal work is also easy, and despite that, the safety is maintained without the risk of the fall-prevention body coming off even in an emergency situation where the internal pressure rises and the pushing force due to overflow is applied. Has the effect of being
【図１】本発明に係る地下構造物等への転落防止装置の
実施例を示す分解斜視図。FIG. 1 is an exploded perspective view showing an embodiment of a fall prevention device for an underground structure or the like according to the present invention.
【図２】転落防止体の平面図。FIG. 2 is a plan view of a fall prevention body.
【図３】断熱板の平面図。FIG. 3 is a plan view of a heat insulating plate.
【図４】（ａ）第１の掛け止め部材のフリー状態の一部
破断平面図。
（ｂ）第１の掛け止め部材のロック状態の一部破断平面
図。FIG. 4A is a partially cutaway plan view of the first latch member in a free state. (B) A partially broken plan view of the locked state of the first latch member.
【図５】（ａ）第２の掛け止め部材の断面図。 （ｂ）第２の掛け止め部材の内面図。FIG. 5A is a sectional view of a second latch member. (B) The inside view of the 2nd latch member.
【図６】蓋受け枠へ取り付けた状態の一部破断平面図。FIG. 6 is a partially cutaway plan view showing a state of being attached to a lid receiving frame.
【図７】（ａ）断熱板を使用しない状態の断面図。 （ｂ）断熱板を使用する状態の断面図。FIG. 7A is a cross-sectional view of a state in which a heat insulating plate is not used. (B) Sectional drawing of the state which uses a heat insulating board.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) E02D 29/12 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) E02D 29/12
Claims (2)
造物等の蓋受け枠の開口内に取り付けて人の転落等を防
止可能な転落防止体を有する装置であって、蓋受け枠の
開口内に形成されているステップ等の突出部に上方又は
下方から掛け止める第１の掛け止め部材を転落防止体に
設けるとともに、突出部に下方又は上方から掛け止める
ロック部材を掛け止め方向及び逆方向へ移動可能に第１
の掛け止め部材又はその近傍に設け、蓋受け枠の開口内
に入り込んで抜け止めとなる第２の掛け止め部材を第１
の掛け止め部材から離れた位置にて転落防止体に設け、
転落防止体の上面に、融雪防止用の断熱板を弱い固定手
段によって着脱容易に取り付けたことを特徴とする地下
構造物等への転落防止装置。1. A device which has a net-like or lattice-like structure and has a fall-preventing body which can be installed in an opening of a lid-receiving frame of an underground structure or the like to prevent a person from falling, and the like. The fall prevention body is provided with a first latching member that locks from above or below a protruding portion such as a step formed in the opening of the lock stopper, and a locking member that locks the protrusion from below or above the locking direction and First movable in the opposite direction
A second latching member that is provided at or near the latching member of the first latching member and that is inserted into the opening of the lid receiving frame to prevent it from coming off.
Provided fall prevention member at spaced from latching member position,
On the top surface of the fall prevention body, attach a heat-insulating plate to prevent snow melting
A fall prevention device for underground structures, etc., characterized by being easily attached and detached by steps .
めの付勢手段が常時作用している請求項１記載の地下構
造物等への転落防止装置。2. The fall prevention device for an underground structure or the like according to claim 1, wherein the urging means for urging the lock member in the latching direction is constantly operating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000245336A JP3437825B2 (en) | 2000-08-11 | 2000-08-11 | Fall prevention device for underground structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000245336A JP3437825B2 (en) | 2000-08-11 | 2000-08-11 | Fall prevention device for underground structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002061214A JP2002061214A (en) | 2002-02-28 |
| JP3437825B2 true JP3437825B2 (en) | 2003-08-18 |
Family
ID=18735882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000245336A Expired - Fee Related JP3437825B2 (en) | 2000-08-11 | 2000-08-11 | Fall prevention device for underground structures |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3437825B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2549822Y2 (en) * | 1991-06-24 | 1997-10-08 | 日之出水道機器株式会社 | Fall prevention structure for underground structures |
| JP3525287B2 (en) * | 1999-04-05 | 2004-05-10 | 日之出水道機器株式会社 | Fall prevention middle cover of underground structure cover and receiving frame provided with fall prevention middle cover |
-
2000
- 2000-08-11 JP JP2000245336A patent/JP3437825B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002061214A (en) | 2002-02-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7318695B2 (en) | Cover for a tie-down anchor | |
| US20050246875A1 (en) | Karabiner | |
| JPH0789310A (en) | Pintle hook type coupling device | |
| KR102433643B1 (en) | Towing hook with double locking function | |
| US7226092B2 (en) | Fastening device with lock mechanism | |
| US20190078351A1 (en) | Door handle lock | |
| US20090106957A1 (en) | Buckle device | |
| JP3437825B2 (en) | Fall prevention device for underground structures | |
| JP4194049B2 (en) | Intrusion release structure for lids for underground structures | |
| JPS5818505B2 (en) | Tobirajyou | |
| JP3811916B2 (en) | Manhole cover structure | |
| JP3616920B2 (en) | Locking structure for lids for underground structures | |
| JP5100147B2 (en) | Stay for window ventilation | |
| JP2011089315A (en) | Scaffold support connecting hook and safety belt | |
| JP3449608B2 (en) | Locking device for underground structures | |
| JP4602117B2 (en) | Locking device for underground structures | |
| US1499895A (en) | Hood latch | |
| JP4194050B2 (en) | Intrusion release structure for lids for underground structures | |
| KR200369960Y1 (en) | Manhol cover security apparatus | |
| JP4194048B2 (en) | Intrusion release structure for lids for underground structures | |
| JP3308500B2 (en) | Lock structure of manhole cover | |
| JP4431253B2 (en) | Gutter suspension support | |
| JP4183198B2 (en) | Cover for underground structure | |
| EP1294992B1 (en) | Manhole cover frame with self locking function of the cover | |
| JP3766313B2 (en) | Device for closing holes in lids for underground structures |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080606 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090606 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100606 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100606 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110606 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110606 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120606 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120606 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130606 Year of fee payment: 10 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |