JPH0350636U

JPH0350636U -

Info

Publication number: JPH0350636U
Application number: JP11063189U
Authority: JP
Priority date: 1989-09-20
Filing date: 1989-09-20
Publication date: 1991-05-16

Description

[Brief explanation of drawings]

図面は本考案マンホール装置における施錠構造
の実施例を示し、第１図は使用状態を示す縦断正
面図、第２図は２−２拡大断面図、第３図は要部
の平面図で一部切欠する、第４図は被掛鈎が固定
掛鈎に掛合した状態を示す要部の縦断正面図、第
５図、第６図は夫々解錠状態を示す要部の縦断正
面図、第７図は従来の施錠構造の縦断正面図で可
動掛鈎が、固定掛鈎に掛合した状態を示す。尚図中、Ａ……施錠構造、２……マンホール蓋
、１……マンホール枠、１ａ……マンホール蓋の
側周壁、ａ_１……固定掛鈎、ａ_２……施錠体、ａ
_３……抜差口、４……被掛鈎。 The drawings show an embodiment of the locking structure of the manhole device of the present invention, and Fig. 1 is a longitudinal sectional front view showing the state of use, Fig. 2 is a 2-2 enlarged sectional view, and Fig. 3 is a plan view of the main part, with a partial view. Fig. 4 is a longitudinal sectional front view of the main part showing the state in which the hook is engaged with the fixed hook, Fig. 5 and 6 are longitudinal sectional front views of the main part showing the unlocked state, respectively, and Fig. 7 is a longitudinal sectional front view of the main part showing the unlocked state. This is a longitudinal sectional front view of a conventional locking structure, showing a state in which a movable hook is engaged with a fixed hook. In the figure, A... Locking structure, 2... Manhole cover, 1... Manhole frame, 1a... Side peripheral wall of manhole cover, a ₁ ... Fixed hook, a ₂ ... Locking body, a
₃ ... Socket, 4... Hook for hanging.

Claims

[Scope of utility model registration request]

The locking structure of a manhole device that allows the manhole cover that fits into the manhole frame to be lifted slightly in the vertical direction includes a fixed hook protruding from the inner surface of the side peripheral wall of the manhole frame, and a slide for the locking body provided on the manhole cover. and a locking body which engages with the inner circumferential surface of the slot in a watertight manner and cannot be removed when inserted into the slot, and the hook at the lower end is located with a space directly below the fixed hook at the lower end. A locking device for a manhole device, characterized in that: