JPS6022545U

JPS6022545U - Manhole cover with internal pressure relief mechanism

Info

Publication number: JPS6022545U
Application number: JP11402983U
Authority: JP
Inventors: 安部　武治
Original assignee: 日豊金属工業株式会社
Priority date: 1983-07-22
Filing date: 1983-07-22
Publication date: 1985-02-16
Also published as: JPS6223884Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図はマンホール蓋の断面図、第２図は蓋部と係止金
具の嵌合状態を示す断面図、第３図は蓋部の摺動孔部分
の平面図、第４図は係止金具の平面図、第５図は水圧で
蓋部が浮上した状態の断面図、第６図は蓋部と受枠の係
合を係脱する係止金具の位置を示す断面図、第７図及び
第８図は係止金具を蓋部より引上ける為の断面図を表わ
す。１・・・・・・マンホール蓋、２・・・・・・受枠、’
　３・・・・・・蓋部、４・・・・・・蝶番用棚部、５
・・・・・・蝶番用長孔、７・・・・・・蝶番用立設壁
、８・・・・・・円球部、９・・・・・・蝶番用連結金
具、１５・・・・・・摺動孔、２０・・・・・・係止金
具、２１・・・・・・係合蓋部、２２・・・・・・円柱
部、２３．２４・・・・・・摺動部、２５．２６・・・
・・・切欠部、２７，２８・・・・・・錠孔、２９・・
・・・・係止突起、３０・・・・・・係合突起、３１・
・・・・・錠具、３２・・・・・・錠具の円弧状部。Fig. 1 is a cross-sectional view of the manhole cover, Fig. 2 is a cross-sectional view showing the fitted state of the cover and the locking fitting, Fig. 3 is a plan view of the sliding hole portion of the cover, and Fig. 4 is the locking part. A plan view of the metal fitting, FIG. 5 is a cross-sectional view of the lid floating under water pressure, FIG. 6 is a cross-sectional view showing the position of the locking metal fitting that engages and disengages the lid and the receiving frame, and FIGS. FIG. 8 shows a cross-sectional view for pulling up the locking fitting from the lid. 1... Manhole cover, 2... Receiving frame,'
3... Lid part, 4... Hinge shelf part, 5
...Elongated hole for hinge, 7 ... Erected wall for hinge, 8 ... Circular part, 9 ... Connection fitting for hinge, 15 ... ...Sliding hole, 20...Lock fitting, 21...Engagement lid part, 22...Cylindrical part, 23.24... Sliding part, 25.26...
...Notch, 27, 28...Lock hole, 29...
...Latching protrusion, 30...Engagement protrusion, 31.
... Lock, 32 ... Arc-shaped part of the lock.

Claims

[Scope of utility model registration request]

A receiving frame, a lid fitted to the receiving frame, an upper end rotatably disposed on the back edge of the lid, and a lower end freely disposed around the inner periphery of the receiving frame so as to be movable a certain distance in the vertical direction. The hinge connection fitting is arranged to be slidable a certain distance in the vertical direction on the lid part in accordance with the position of the engagement projection projected on the inner peripheral surface of the receiving frame, and the engagement projection is arranged vertically. A manhole cover with an internal pressure relief plate groove, which comprises an engaging protrusion on a receiving frame and a locking metal fitting that can be rotated to be removably engaged.