JPH0354839U

JPH0354839U -

Info

Publication number: JPH0354839U
Application number: JP11266589U
Authority: JP
Priority date: 1989-09-26
Filing date: 1989-09-26
Publication date: 1991-05-27

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例の縦断側面図（こ
の実施例の鉄蓋を第６図のＡ−Ａ方向から見た図
）、第２図は同実施例のバール穴の拡大縦断面図
、第３図は同実施例のバール穴を鉄蓋の下面から
見た図、第４図は鉄蓋のガス抜穴に栓を打ち込ん
だ状態を示す拡大縦断面図、第５図は同実施例の
栓の斜視図、第６図は従来のバール穴を有する鉄
蓋と受枠の部分切欠き平面図、第７図は同従来の
鉄蓋を第６図のＡ−Ａ方向から見た縦断側面図、
第８図は同従来の鉄蓋のバール穴の拡大縦断面図
、第９図は同従来のバール穴を鉄蓋の下面から見
た図、第１０図は下水道マンホールの縦断面図で
ある。１１……バール穴、１２……横穴、１３……ガ
ス抜穴、１５……栓、１７……鉄蓋、１８……鉄
蓋の外縁部、２１……鉄蓋の外周面、２２……鉄
蓋の上面、２３……バール穴の側壁、２７……鉄
蓋の下面、２８……栓の小孔。 Fig. 1 is a longitudinal cross-sectional side view of one embodiment of this invention (a view of the iron lid of this embodiment seen from the direction A-A in Fig. 6), and Fig. 2 is an enlarged longitudinal cross-section of the crowbar hole of the same embodiment. Fig. 3 is a view of the crowbar hole of the same example as seen from the bottom of the iron cover, Fig. 4 is an enlarged vertical sectional view showing the state in which a plug is driven into the gas vent hole of the iron cover, and Fig. 5 is the same. FIG. 6 is a partially cutaway plan view of a conventional iron lid with a crowbar hole and a receiving frame, and FIG. 7 is a perspective view of the conventional iron lid as seen from the A-A direction in FIG. 6. longitudinal side view,
FIG. 8 is an enlarged longitudinal cross-sectional view of the conventional crowbar hole of the iron cover, FIG. 9 is a view of the conventional crowbar hole seen from the underside of the iron cover, and FIG. 10 is a longitudinal cross-sectional view of the sewer manhole. 11... Barrel hole, 12... Horizontal hole, 13... Gas vent hole, 15... Plug, 17... Iron lid, 18... Outer edge of iron lid, 21... Outer peripheral surface of iron lid, 22... Upper surface of the iron lid, 23... Side wall of the crowbar hole, 27... Lower surface of the iron lid, 28... Small hole of the stopper.

Claims

[Scope of Claim for Utility Model Registration] (1) An iron lid provided to open and close the opening, a bag-shaped crow hole on the outer edge of the iron lid that opens from the top surface to the outer circumferential surface and faces inward, and this crow An iron cover having a crowbar hole, which includes a horizontal hole bored in the side wall of the hole and communicating the interior of the crowbar hole with the lower surface side of the iron cover. (2) A plug having a gas vent hole or water drain hole that penetrates from the top surface to the bottom surface of the iron lid, and a large number of small holes that are driven into the gas vent hole or water drainage hole and that penetrate from the top surface to the bottom surface of the iron lid. The iron lid having a crowbar hole according to claim 1, further comprising: