JPH0470344U

JPH0470344U -

Info

Publication number: JPH0470344U
Application number: JP11297090U
Authority: JP
Priority date: 1990-10-26
Filing date: 1990-10-26
Publication date: 1992-06-22

Description

[Brief explanation of the drawing]

第１図は本考案のマンホール蓋用ロツク兼浮上
防止装置の上面図、第２図は同装置の縦断面図、
第３図は同装置のロツクを解除する使用説明図、
第４図、第５図はロツク解除に使用される引上げ
具の斜視図、第６図は同引上げ具を鍵穴及び差込
み部に差込んだ状態の縦断面図、第７図は第６図
の下面図、第８図は同装置のロツクを解除した状
態の説明図、第９図は第８図の縦断面図、第１０
図は第９図の下面図、第１１図は同装置に使用さ
れたマンホール枠の上面図、第１２図、第１３図
は同装置の組立て説明図、第１４図は従来のマン
ホール蓋用浮上防止装置の縦断面図、第１５図〜
第１７図は同装置の係止解除の説明図である。１はマンホール枠、２は係止部、３はマンホー
ル蓋、４は支持突子、５は回転体、６は鍵穴、７
は差込み部、Ａは引上げ具、Ｂは先端部。 Fig. 1 is a top view of the manhole cover lock/floating prevention device of the present invention, Fig. 2 is a longitudinal sectional view of the same device,
Figure 3 is an explanatory diagram for unlocking the device;
Figures 4 and 5 are perspective views of the pulling tool used for unlocking, Figure 6 is a vertical sectional view of the pulling tool inserted into the keyhole and the insertion part, and Figure 7 is the same as that shown in Figure 6. A bottom view, FIG. 8 is an explanatory diagram of the device in an unlocked state, FIG. 9 is a vertical sectional view of FIG. 8, and FIG.
The figure is a bottom view of Fig. 9, Fig. 11 is a top view of the manhole frame used in the device, Figs. 12 and 13 are explanatory diagrams for assembling the device, and Fig. 14 is a conventional floating manhole cover. Vertical sectional view of the prevention device, Fig. 15~
FIG. 17 is an explanatory diagram of unlocking of the device. 1 is a manhole frame, 2 is a locking part, 3 is a manhole cover, 4 is a support protrusion, 5 is a rotating body, 6 is a keyhole, 7
is the insertion part, A is the puller, and B is the tip.

Claims

[Scope of utility model registration request]

A locking part 2 is provided to protrude inward from the inner circumferential surface of the manhole frame 1, a support protrusion 4 is formed on the inner surface of the manhole cover 3, and a rotor 5 is attached to the support protrusion 4 along the back surface of the manhole cover 3. an insertion part 7 which is rotatably supported by the manhole cover 3, and in which the tip part B of the lifting tool A inserted through the keyhole 6 of the manhole cover 3 is locked;
When the lifting tool A is rotated and the rotor 5 is rotated, it is locked to the lower surface of the locking part 2 of the manhole frame 1, and when the rotor 5 is rotated in the opposite direction, the lock is removed from the locking part 2. A manhole cover lock and floating prevention device characterized by a protruding claw 8.