JPS5927431Y2 - Locking device for manhole cover - Google Patents

Description

【考案の詳細な説明】 本考案は下水道や大型の水槽等へ人が出入りするために
設けられるマンホールにおける蓋の係止装置、詳しくは
蓋の外周部とそれより下方の開口部外周壁とに夫々係止
片を設けこの同伴止片を連結軸により連結して蓋を開口
部に着脱自在に取付けるマンホールにおける蓋の係止装
置の改良に関するものである。[Detailed description of the invention] This invention is a locking device for a lid in a manhole provided for people to enter and exit a sewer or a large water tank, etc. The present invention relates to an improvement in a locking device for a lid in a manhole, in which a locking piece is provided in each case, and the locking pieces are connected by a connecting shaft to detachably attach the lid to the opening.

従来マンホールはその開口部が着脱自在な蓋で覆われ、
単に開口部の周壁上端に嵌め合うだけで、工具を使用せ
ずとも誰でも簡単に取外せるようになっているため下水
道等の保守点検作業を行う作業者以外の者、即ちマンホ
ールの構造や危険性を熟知しない一般の人が不用意にマ
ンホールに入り込み、事故を起す危険性があった。Conventionally, the opening of a manhole is covered with a removable cover.
It simply fits onto the top edge of the peripheral wall of the opening and can be easily removed by anyone without the use of tools, so it is safe for anyone other than those who perform maintenance and inspection work on sewerage systems, etc., in other words, the structure and danger of the manhole. There was a risk that ordinary people who were not familiar with sex could carelessly enter the manhole and cause an accident.

そこで本願出願人は斯様な欠陥性を解で消するために、
マンホールの蓋を工具を使用しなければ取外せないよう
にした構造を本考案出願前に考案した。Therefore, in order to eliminate such defectiveness, the applicant has
A structure was devised in which the manhole cover could not be removed without the use of a tool before the invention was filed.

即ち、その考案は蓋の外周部とそれより下方の開口部周
壁の外面とに夫々係止片を上下に対応させて設け、この
２つの係止片をそれらに工具を介して係脱される連結軸
により連結し、上記蓋を開口部周壁に着脱自在に係止せ
しめた構造である。That is, the idea is to provide locking pieces on the outer periphery of the lid and on the outer surface of the peripheral wall of the opening below the lid in vertically corresponding manner, and to engage and release the two locking pieces using a tool. They are connected by a connecting shaft, and the lid is detachably locked to the peripheral wall of the opening.

しかし乍ら以上のものは車輌による振動等により、係止
部材が外れ落ちる虞れがあることがわかった。However, it has been found that there is a risk that the locking member may come off and fall due to vibrations caused by the vehicle.

然るに本考案は斯様な事情に鑑みてなされたものであり
、その基本的構成は前記蓋の係止片に、開口部の係止片
方向に向けて一体に設けた連結軸挿通用の肉厚状ガイド
筒、ガイド筒にマンホール方向に向けて貫挿せしめた貫
挿孔、貫挿孔に螺合し連結軸を締結する螺子とより構成
し、前記ガイド筒貫挿孔におけるマンホール側を螺子挿
通部、その反対側を螺合部とし、螺合部に螺子の脱落を
防止する突起を設けて、貫挿孔の螺子挿通部より螺合部
に螺合せしめた螺子により、連結軸を締結して係止せし
め、その螺子の脱落を突起によって防止したものである
。However, the present invention was developed in view of such circumstances, and its basic structure is that the locking piece of the lid has a piece of meat for inserting the connecting shaft that is integrally provided in the direction of the locking piece of the opening. It is composed of a thick guide tube, a through hole inserted into the guide tube toward the manhole, and a screw that is screwed into the through hole to fasten the connecting shaft, and the manhole side of the guide tube through hole is connected to the screw. The insertion part and the opposite side are the threaded part, the threaded part is provided with a protrusion that prevents the screw from falling off, and the connecting shaft is fastened by the screw that is screwed into the threaded part from the screw insertion part of the through hole. The protrusion prevents the screw from falling off.

本考案実施の一例を下水道用マンホールの蓋の係止装置
について図面により説明すると、図中Ａはマンホールで
あり、地中の下水道（不図示）に連絡すると共に路面等
に開口されている。An example of the implementation of the present invention will be described with reference to a drawing regarding a locking device for a manhole cover for sewerage. In the drawing, A is a manhole, which communicates with an underground sewerage system (not shown) and opens onto a road surface or the like.

前記マンホールＡの開口部１はその周壁１ａが該開口部
１周囲から独立して起立している。The peripheral wall 1a of the opening 1 of the manhole A stands up independently from the periphery of the opening 1.

２は前記開口部１を覆う蓋であり、開口部周壁１ａの上
端部外周に着脱自在に嵌め合っている。Reference numeral 2 denotes a lid that covers the opening 1, and is removably fitted onto the outer periphery of the upper end of the opening peripheral wall 1a.

そして、上記マンホールＡにおいてその開口部１を覆う
蓋２が開口部周壁１ａに係止されるが、その係止される
個所は１個所乃至複数個所であり又、その構造は次の様
になっている。In the manhole A, the lid 2 covering the opening 1 is locked to the peripheral wall 1a of the opening, and the lid 2 is locked at one or more places, and its structure is as follows. ing.

３は蓋２の外周部に溶接して設けられた係止片であり、
断面略り字型のアングル材が使用され蓋２から水平に突
出している。3 is a locking piece welded to the outer periphery of the lid 2;
An angle member with an abbreviated cross section is used and projects horizontally from the lid 2.

４は蓋２より下方の開口部周壁１ａ外面に設けられた係
止片であり、その基部に溶接された止板５を針で開口部
周壁１ａに止着して固定され、前記係止片３の下方にそ
れと平行に対応して開口部周壁１ａから突出している。Reference numeral 4 denotes a locking piece provided on the outer surface of the opening peripheral wall 1a below the lid 2, and a stop plate 5 welded to the base thereof is fixed to the opening peripheral wall 1a with a needle, and the locking piece is fixed. 3 and protrudes from the opening peripheral wall 1a in parallel therewith.

７は前記係止片４に設けられた長孔である。7 is a long hole provided in the locking piece 4.

８は前記２つの係止片３，４に渉って設けられ、それら
を連結する連結軸である。Reference numeral 8 denotes a connecting shaft that is provided across the two locking pieces 3 and 4 and connects them.

この連結軸８は逆Ｔ字型とされ、その下端の水平杆部８
ａが開口部周壁１ａ側の係止片４の長孔７下方にそれと
直交状に対応し、それによって係止片４上方へ移動し得
ないよう係止されている。This connecting shaft 8 has an inverted T-shape, and a horizontal rod portion 8 at the lower end thereof.
A corresponds perpendicularly to the lower part of the elongated hole 7 of the locking piece 4 on the side of the opening peripheral wall 1a, thereby locking the locking piece 4 so that it cannot move upward.

図中８ｂは摘みで、この摘み８ｂを摘んで連結軸８を回
動することにより水平杆部８ａと長孔７との係止状態を
解除し連結軸８が係止片３，４から抜出でき、蓋２が開
放し得るようにしたものである。In the figure, reference numeral 8b indicates a knob, and by pinching this knob 8b and rotating the connecting shaft 8, the locking state between the horizontal rod portion 8a and the elongated hole 7 is released, and the connecting shaft 8 is pulled out from the locking pieces 3 and 4. The lid 2 can be opened.

尚、前記水平杆部８ａは後述するように長孔７と合致し
た状態でそれを通過できるようになっている。As will be described later, the horizontal rod portion 8a is aligned with the elongated hole 7 so as to be able to pass through it.

一方、連結軸８は蓋２側の係止片３下面に溶接された肉
厚状ガイド筒９を挿通し、その後述する螺子１０の先端
が係合する位置にくびれ部が設けてあり、このくびれ部
に螺子１０が係合することにより、連絡軸８の上下方向
の抜は止がなされる。On the other hand, the connecting shaft 8 passes through a thick guide tube 9 welded to the lower surface of the locking piece 3 on the lid 2 side, and has a constricted portion at a position where the tip of a screw 10, which will be described later, engages. By engaging the screw 10 with the constricted portion, the connecting shaft 8 is prevented from being pulled out in the vertical direction.

図中６は前記ガイド筒９にマンホール方向に向けて貫挿
せしめた貫挿孔であり、この貫挿孔６におけるマンホー
ル側を螺子挿通部６ａ、その反対側を螺合部６ｂとする
。In the figure, 6 is a through hole inserted into the guide tube 9 toward the manhole, and the manhole side of this through hole 6 is a screw insertion part 6a, and the opposite side is a screw insertion part 6b.

そしてこの螺子挿通部６ａより螺子１０を螺合部６ｂに
螺合するように構成され、また螺合部６ｂの先端には（
締付方向と逆方向）の突起６Ｃが突設され、この突起６
Ｃによって螺合状態の螺子１０の脱落は防止される。The screw 10 is screwed into the threaded part 6b from this threaded part 6a, and the tip of the threaded part 6b is
A protrusion 6C (in the opposite direction to the tightening direction) is provided, and this protrusion 6
C prevents the screw 10 in the screwed state from falling off.

斯して前記螺子１０はガイド筒９に連結軸８を挿通せし
める前に、螺子挿通孔６ａより螺合部６ｂに装着し、ガ
イド筒９内に連結軸８を挿通した後、突起６側の開口部
より工具を挿込んで螺子１０を連結軸８方向に螺合締結
すると連結軸８の回転が防止され蓋２は係止する。In this way, the screw 10 is inserted into the threaded portion 6b through the screw insertion hole 6a before the connecting shaft 8 is inserted into the guide tube 9, and after the connecting shaft 8 is inserted into the guide tube 9, the screw 10 is inserted into the threaded portion 6b on the projection 6 side. When a tool is inserted through the opening and the screw 10 is screwed in the direction of the connecting shaft 8, rotation of the connecting shaft 8 is prevented and the lid 2 is locked.

そして螺子１０を逆方向に回動しその締付状態を解除し
た後、摘み８ｂを回すと連結軸８の水平杆部８ａの係止
片４に対する保合状態が解除され、同伴止片３，４より
連結軸８が抜き取られ、開蓋する。Then, after rotating the screw 10 in the opposite direction to release the tightened state, turning the knob 8b releases the state in which the horizontal rod portion 8a of the connecting shaft 8 is held against the locking piece 4, and the accompanying stopper piece 3, The connecting shaft 8 is pulled out from 4 and the lid is opened.

本考案は叙上の如く構成したので、蓋の係止手段である
連結軸と蓋及び開口部周壁の各係止片との係止状態が工
具を使用しなければ解除できず、従来の様に一般の人が
不用意にマンホールへ入って事故を起すといった危険性
を解消することができることは勿論、連結軸締結用の螺
子がマンホール近傍を通過する車輌等の振動により緩み
が生じても突起によってガイド筒より外れ落ちることが
ない。Since the present invention is constructed as described above, the locking state between the connecting shaft, which is the locking means for the lid, and each locking piece on the lid and the opening peripheral wall cannot be released without using a tool, unlike the conventional method. This not only eliminates the risk of people inadvertently entering manholes and causing accidents, but also prevents protrusions even if the screws used to fasten the connecting shaft become loose due to vibrations from vehicles passing near the manhole. This prevents it from falling off the guide tube.

従って螺子の紛失を防止できるし、また緩みが生じても
螺子はガイド筒内に収まっているため再度挿入すること
なく単に締付けるのみで良く係止作業が簡単且つ容易で
作業性を向上し得る。Therefore, it is possible to prevent the screw from being lost, and even if the screw becomes loose, it is stored in the guide cylinder, so it can be simply tightened without reinserting it, and the locking operation is simple and easy, and work efficiency can be improved.

依って所期の目的を達し得る。Therefore, the intended purpose can be achieved.

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

第１図は本考案係止装置を示す平面図、第２図は縦断面
図、第３図は底面図であり、図中Ａはマンホール、１は
開口部、２は蓋、３，４は係止片、６は貫挿孔、６ａは
螺子挿通孔、６ｂは螺合部、６Ｃは突起、８は連結軸、
９はガイド筒、１０は螺子を夫々示す。Fig. 1 is a plan view showing the locking device of the present invention, Fig. 2 is a vertical sectional view, and Fig. 3 is a bottom view. In the figures, A is a manhole, 1 is an opening, 2 is a lid, and 3 and 4 are A locking piece, 6 is a through hole, 6a is a screw insertion hole, 6b is a threaded part, 6C is a protrusion, 8 is a connecting shaft,
Reference numeral 9 indicates a guide cylinder, and reference numeral 10 indicates a screw.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 蓋の外周部とそれより下方の開口部外周壁とに夫々係止
片を設けこの同伴止片を連結軸により連結して蓋を開口
部に着脱自在に取付けるマンホールにおいて、前記蓋の
係止片に、開口部の係止片方向に向けて一体に設けた連
結軸挿通用の肉厚状ガイド筒、ガイド筒にマンホール方
向に向けて貫挿せしめた貫挿孔に螺合し連結軸を締結す
る螺子とより構成し、前記ガイド筒の貫挿孔におけるマ
ンホール側を螺子挿通部、その反対側を螺合部とし、螺
合部に螺子の脱落を防止する突起を設けてなることを特
徴とするマンホールにおける蓋の係止装置。In a manhole in which a locking piece is provided on the outer periphery of the lid and the outer peripheral wall of the opening below the lid, and the locking pieces are connected by a connecting shaft to detachably attach the lid to the opening, the locking piece of the lid is provided with a locking piece. A thick-walled guide tube for inserting the connecting shaft is provided integrally toward the locking side of the opening, and the connecting shaft is screwed into the through hole inserted through the guide tube toward the manhole direction to fasten the connecting shaft. The manhole side of the through-hole of the guide tube is a screw insertion part, the opposite side thereof is a threaded part, and the threaded part is provided with a protrusion to prevent the screw from falling off. A locking device for the lid of a manhole.