JPH0540117Y2 - - Google Patents

Description

【考案の詳細な説明】 （産業上の利用分野） 本考案は地下構造物の蓋体を錠止する錠機構に
関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a locking mechanism for locking the lid of an underground structure.

（従来の技術） 地下構造物の開口（マンホール等）を塞ぐ蓋は
車両の通過によつて不慮に跳出したり、マンホー
ル内からの溢水や、空気、ガスの噴出により外れ
ることがあり、さらには盗難にあうとか、ごみ、
廃物が不法投棄されるような問題もある。そうし
た事態を防ぐため出願人は錠付きのものを開発し
てきた。それらは実公昭60−19159号、同20675号
等として公告されているが、従来のタイプはどち
らかといえば部品形状や機構上単純さを欠き、製
造上も工数を多く要することがあつた。そこで出
願人はさらに開発を継続し、その結果本考案を完
成したものである。(Prior art) A cover that closes an opening (manhole, etc.) in an underground structure may accidentally pop out when a vehicle passes by, or may come off due to overflow of water or air or gas from inside the manhole. Being robbed, trash,
There are also problems such as illegal dumping of waste. To prevent such situations, the applicant has developed a device with a lock. These were published as Utility Model Publications No. 19159-1915, No. 20675, etc., but the conventional types lacked simplicity in terms of part shape and mechanism, and required a large number of man-hours to manufacture. Therefore, the applicant continued development, and as a result, the present invention was completed.

（技術的課題） 従つて本考案の目的は前記の点を解決し、より
少ない部品点数で確実な施錠と、容易な解錠を行
なうことができ、しかも小型化し得る地下構造物
用錠機構を提供することにある。(Technical Problem) Therefore, the purpose of the present invention is to solve the above-mentioned problems, and to provide a locking mechanism for underground structures that can perform reliable locking and easy unlocking with fewer parts, and can be downsized. It is about providing.

（技術的手段） 前記目的を達する本考案は、地下構造物の蓋体
１を受止める枠体２の内突部３と係合する鉤部材
４を蓋体１の小開口近くの裏面に軸支し、前記小
開口１ａに配置される開蓋アーム５を鉤部材４に
近接して軸支し、鉤部材４と開蓋アーム５の夫々
背部に延長部６，７を開蓋時に当接可能に突設す
るとともに、開蓋アーム５を閉じ状態に保つ重り
８を鉤部材４及び／又は開蓋アーム５に設けた地
下構造物用錠機構である。(Technical Means) The present invention that achieves the above object has a hook member 4 that engages with the inner protrusion 3 of the frame 2 that receives the lid 1 of the underground structure, which is pivoted on the back surface of the lid 1 near the small opening. The opening arm 5 disposed in the small opening 1a is pivotally supported close to the hook member 4, and extensions 6 and 7 abut on the backs of the hook member 4 and the opening arm 5, respectively, when the lid is opened. This is a locking mechanism for an underground structure in which a weight 8 is provided on the hook member 4 and/or the opening arm 5 so as to protrude and keep the opening arm 5 in a closed state.

（実施例） 図示実施例により説明すると、図面には円形開
口のマンホールについて蓋体１を枠体２と開口の
テーパー面９で嵌合させて受止める構造のものが
例示されている。蓋体１は周縁部にＵ形切欠状の
小開口１ａを有し、これを閉じるように配置され
る小蓋１０を先端に設けた開蓋アーム５が小開口
１ａの近くに支軸１１に回動可能に軸支されてお
り、他方、枠体２の内突部３と係合する鉤部材４
は蓋体周縁に並ぶように近接して支軸１２により
同様に回動可能に軸支されており、開蓋操作時に
両部材４、５を連繋させるため夫々の背部に延長
部６，７を突設した基本的構成を有する。(Embodiment) To explain with reference to the illustrated embodiment, the drawing shows an example of a manhole having a circular opening having a structure in which the lid 1 is fitted and received by the frame 2 and the tapered surface 9 of the opening. The lid body 1 has a U-shaped notch-shaped small opening 1a at its peripheral edge, and a lid opening arm 5 having a small lid 10 at its tip arranged to close this opening 1a is attached to a support shaft 11 near the small opening 1a. A hook member 4 is rotatably supported on a shaft and engages with an inner protrusion 3 of the frame body 2.
are similarly rotatably supported by a support shaft 12 in close proximity to the periphery of the lid, and extensions 6 and 7 are provided on the backs of each to connect both members 4 and 5 when opening the lid. It has a basic structure with a protruding structure.

第１図乃至第３図に示された実施例の鉤部材４
は、下端に係合フツク４ａを有し、自重により内
突部３と係合状態となるように軸支され、延長部
６は蓋体１の内方へ延びた直状である。これと上
下に接する延長部７を有する開蓋アーム５は、第
１図に見る通り屈曲部１３を有し、その延長部７
は小蓋１０を小開口１ａ内において閉じ状態に保
つ重り８を兼ねている。鉤部材４は自重で閉じ状
態を保つので両延長部６，７が常に接している必
要はなく、解錠の際に開蓋アーム５の延長部７が
上位の延長部６に接し得れば良い。しかし、鉤部
材４の延長部６に重り８を設けるとともに、開蓋
アーム５の延長部７を下位に配置して、鉤部材４
の係合状態と開蓋アーム５の閉じ状態を得るよう
な変更は本考案の範囲内で実施できる。 Hook member 4 of the embodiment shown in FIGS. 1 to 3
has an engaging hook 4a at its lower end, and is pivoted so as to be engaged with the inner protrusion 3 by its own weight, and the extension part 6 has a straight shape extending inward of the lid body 1. As seen in FIG.
doubles as a weight 8 that keeps the small lid 10 closed within the small opening 1a. Since the hook member 4 maintains the closed state due to its own weight, it is not necessary that both extensions 6 and 7 are always in contact with each other, and as long as the extension 7 of the lid opening arm 5 can come into contact with the upper extension 6 when unlocking. good. However, by providing a weight 8 on the extension 6 of the hook member 4 and arranging the extension 7 of the lid opening arm 5 at a lower position, the hook member 4
Modifications to obtain the engaged state of the opening arm 5 and the closed state of the opening arm 5 can be made within the scope of the present invention.

第４図乃至第５図の変形例は鉤部材４の延長部
６も、開蓋アーム５の延長部７も共に屈曲部１
３，１４を有する例であり、このため支軸１１，
１２の軸受を蓋体１の縁部に沿つて設けることが
できる。なお、延長部６が延長部７の上になるこ
と、鉤部材４が自重で係合状態を保つ構成は前記
の実施例と同様であるので符号を援用し、詳細な
説明は省略する。なお各図中、符号１５，１６は
鉤部材４の支軸１２の軸受溝、１７，１８は開蓋
アーム５の支軸１１の軸受溝で、一方の軸受溝１
５，１７の挿入側にはボルトナツトから成る抜止
め１９が施されている。また、２１は小開口１ａ
の奥部裏面に形成した係止突部で、開蓋工具２
２′の掛鉤２４と係合する。 In the modification shown in FIGS. 4 and 5, both the extension part 6 of the hook member 4 and the extension part 7 of the lid opening arm 5 have bent parts 1.
3, 14, and therefore the support shafts 11,
Twelve bearings can be provided along the edge of the lid 1. Note that the structure in which the extension part 6 is placed on the extension part 7 and the hook member 4 maintains the engaged state by its own weight are the same as in the previous embodiment, so the reference numerals will be used and detailed explanation will be omitted. In each figure, reference numerals 15 and 16 are bearing grooves of the support shaft 12 of the hook member 4, 17 and 18 are bearing grooves of the support shaft 11 of the lid opening arm 5, and one of the bearing grooves 1 is
A retainer 19 made of a bolt and nut is provided on the insertion side of 5 and 17. In addition, 21 is the small opening 1a
The locking protrusion formed on the inner back surface of the lid opening tool 2
2' engages with the hook 24.

さらに第８図、第９図の実施例について説明す
ると、この例は鉤部材４の背部に設けるべき延長
部を上部６−１と下部６−２に分けて設け、その
間に開蓋アーム５の延長部７が位置する空所２５
を設けたものである。鉤部材４は自重により内突
部３との係合態勢になるが開蓋アーム５に設けた
延長部７が延長部下部６−２を介して閉蓋中鉤部
材４を強制的にロツク状態に置くようにしても良
く、開蓋の際は開蓋アーム５の延長部７で延長部
上部６−１を押上げてロツクを外すことができ
る。なお延長部７と同下部６−２が接しないとき
は延長部下部６−２は鉤部材４を係合態勢にする
重り８を兼ねる。なお、支軸１１，１２は任意の
軸受２６により支えられるほか、他の基本的構成
は前記２例と同じであるので対応する構成は符号
を援用し説明を省略する。 Further explaining the embodiment shown in FIGS. 8 and 9, in this example, the extension part to be provided on the back of the hook member 4 is divided into an upper part 6-1 and a lower part 6-2, and the opening arm 5 is provided between the parts. Vacant space 25 where the extension part 7 is located
It has been established. The hook member 4 is in the engagement position with the inner protrusion 3 due to its own weight, but the extension part 7 provided on the lid opening arm 5 forcibly locks the hook member 4 through the extension part lower part 6-2 when the lid is closed. When opening the lid, the extension part 7 of the lid opening arm 5 can be used to push up the extension part upper part 6-1 to release the lock. Note that when the extension part 7 and the lower part 6-2 are not in contact with each other, the extension part lower part 6-2 also serves as the weight 8 that brings the hook member 4 into the engagement state. Note that the support shafts 11 and 12 are supported by arbitrary bearings 26, and other basic configurations are the same as in the above two examples, so corresponding configurations will be referred to by reference numerals and their description will be omitted.

（考案の作用） 上述の構成を有する本案機構は、枠体２の開口
を蓋体１で閉じることにより、自動的に、（自重
により）鉤部材４が内突部３の直下に位置して係
合状態となり施錠される。この状態では蓋体１を
開こうとする力が加つても枠体２に施錠されてい
るので、開蓋されることがない。開蓋するには開
蓋工具２２，２２′を用いて小蓋１０を押下げ、
その開蓋アーム５の延長部７が上に接した延長部
６を押上げてフツク４ａを内突部３の直下から内
方へ移動させることにより非係合状態にする（第
５図）。(Operation of the invention) The proposed mechanism having the above-mentioned configuration automatically positions the hook member 4 directly below the inner protrusion 3 (due to its own weight) by closing the opening of the frame 2 with the lid 1. It becomes engaged and locked. In this state, even if a force is applied to open the lid 1, the frame 2 is locked, so the lid will not be opened. To open the lid, use the lid opening tools 22, 22' to push down the small lid 10,
The extension part 7 of the lid-opening arm 5 pushes up the extension part 6 which is in contact with the upper part and moves the hook 4a inward from just below the inner protrusion 3, thereby bringing it into a disengaged state (FIG. 5).

その際開蓋工具２２を用いて両側へ突出する掛
鉤２３を垂下縁２０に引掛けるようにすると蓋体
１を引上げる動作に移り易く（第６図）、別の開
蓋工具２２′を用いてＬ字型の掛鉤２４を係止突
部２１に係止すると蓋体１をこじあける操作が容
易である（第７図）。 At this time, if you use the lid opening tool 22 to hook the hooks 23 protruding to both sides onto the hanging edge 20, it will be easier to move on to the operation of pulling up the lid 1 (Fig. 6), and use another lid opening tool 22'. When the L-shaped hook 24 is locked to the locking protrusion 21, the operation of prying open the lid 1 is easy (FIG. 7).

（考案の効果） 本考案は以上の如く構成され、かつ作用するも
のであり、枠体２側と係合する鉤部材４と、これ
を解錠する開蓋アーム５の二つの部材を蓋体１の
周縁部横に並べて設け、それらを背部の延長部
６，７によつて開蓋操作の際に連繋可能としたも
ので、蓋体１に介在物なしで直接取付けられるか
ら、部品点数が少なく、寸法精度も良く、すり合
わせも殆んど必要なく、組立も容易であるほか、
確実な施錠と、容易な解錠が実現し、小型化し得
るとともに、小開口１ａの直下に可動部がないの
で土砂等が詰りにくい等、実用上顕著な効果を奏
する。(Effects of the invention) The present invention is constructed and operates as described above, and the two members, the hook member 4 that engages with the frame 2 side and the opening arm 5 that unlocks this, are attached to the lid body. 1 are arranged side by side on the peripheral edge of the lid body 1, and can be linked together by the extensions 6 and 7 on the back when opening the lid.Since they can be directly attached to the lid body 1 without any intervening material, the number of parts can be reduced. It is small, has good dimensional accuracy, requires almost no fitting, and is easy to assemble.
Reliable locking and easy unlocking can be realized, miniaturization is possible, and since there is no movable part directly under the small opening 1a, it is difficult to get clogged with earth and sand, etc., which has remarkable practical effects.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本考案に係る地下構造物用錠機構を示す
もので、第１図は第１の実施例に於る蓋体の裏面
図、第２図は側面断面図、第３図は蓋体と開蓋ア
ームの関係を示す説明図、第４図は変形例の蓋体
の裏面図、第５図は側面断面図、第６図、第７図
は開蓋操作の説明図、第８図は第２の実施例に於
る平面説明図、第９図は断面図である。 １……蓋体、２……枠体、３……内突部、４…
…鉤部材、５……開蓋アーム、６，７……延長
部、８……重り。 The drawings show the locking mechanism for underground structures according to the present invention; FIG. 1 is a back view of the lid in the first embodiment, FIG. 2 is a side sectional view, and FIG. An explanatory diagram showing the relationship of the lid opening arm, FIG. 4 is a rear view of the lid of a modified example, FIG. 5 is a side sectional view, FIGS. 6 and 7 are explanatory diagrams of the lid opening operation, and FIG. An explanatory plan view of the second embodiment, and FIG. 9 is a cross-sectional view. 1... Lid body, 2... Frame body, 3... Inner protrusion, 4...
...Hook member, 5... Lid opening arm, 6, 7... Extension part, 8... Weight.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 地下構造物の蓋体１を受止める枠体２の内突部
３と係合する鉤部材４を蓋体１の小開口１ａ近く
の裏面に軸支し、前記小開口１ａに配置される開
蓋アーム５を鉤部材４に近接して軸支し、鉤部材
４と開蓋アーム５の夫々背部に延長部６，７を開
蓋操作により当接可能に突設するとともに、開蓋
アーム５を閉じ状態に保つ重り８を鉤部材４及
び／又は開蓋アーム５に設けた地下構造物用錠機
構。 A hook member 4 that engages with the inner protrusion 3 of the frame 2 that receives the lid 1 of the underground structure is pivotally supported on the back surface of the lid 1 near the small opening 1a, and The lid arm 5 is pivotally supported in close proximity to the hook member 4, and extensions 6, 7 are provided on the backs of the hook member 4 and the lid opening arm 5, respectively, so that they can be brought into contact with each other when the lid is opened. A locking mechanism for underground structures in which a weight 8 for keeping the door closed is provided on the hook member 4 and/or the opening arm 5.