JPH0289038U

JPH0289038U -

Info

Publication number: JPH0289038U
Application number: JP16733988U
Authority: JP
Priority date: 1988-12-23
Filing date: 1988-12-23
Publication date: 1990-07-13

Description

[Brief explanation of drawings]

第１図は従来の普通型マンホール釜蓋の状態を
示す略図的縦断面図、第２図は従来の密閉型マン
ホール釜蓋の状態を示す略図的縦断面図、第３図
は本案の密閉型マンホール蓋用鉄枠を使用した場
合の略図的縦断面図、第４図は本案の嵩上用密閉
型マンホール蓋用鉄枠を使用した場合の略図的縦
断面図、第５図は従来の普通型マンホール釜蓋の
斜視図、第６図は従来の密閉型マンホール釜蓋の
斜視図、第７図は密閉型マンホール蓋用鉄枠の平
面図、第８図はＡ―Ａ線断面図である。３２…密閉型マンホール蓋用鉄枠、３２Ａ…リ
ング状体、３２Ｄ…受穴用内方段部、４２…嵩上
用密閉型マンホール蓋用鉄枠、４２Ａ…リング状
体、４２Ｄ…受穴用内方段部。 Fig. 1 is a schematic vertical sectional view showing the state of a conventional ordinary manhole pot cover, Fig. 2 is a schematic longitudinal sectional view showing the state of a conventional closed type manhole pot cover, and Fig. 3 is a schematic longitudinal sectional view showing the state of a conventional closed type manhole pot cover. A schematic vertical cross-sectional view when using the iron frame for manhole covers, Figure 4 is a schematic vertical cross-sectional view when using the steel frame for closed-type manhole covers of the proposed method, and Figure 5 is a conventional ordinary one. Fig. 6 is a perspective view of a conventional closed-type manhole pot cover, Fig. 7 is a plan view of an iron frame for closed-type manhole cover, and Fig. 8 is a sectional view taken along line A-A. . 32... Iron frame for closed type manhole cover, 32A... Ring-shaped body, 32D... Inner step part for receiving hole, 42... Steel frame for bulky closed type manhole cover, 42A... Ring-shaped body, 42D... For receiving hole Inner step.

Claims

[Claims for Utility Model Registration] 1. The outer circumferential surface and bottom surface of the ring-shaped body are configured to have an L-shaped cross section so as to fit into the inner stepped part for the receiving hole in the pot, and the inner stepped part for the receiving hole to receive the pot lid. An iron frame for a closed manhole cover, characterized in that the stepped portion is composed of an inclined surface corresponding to the inclined side surface of the pot lid, and a horizontal edge corresponding to the outer periphery of the bottom surface of the pot lid. 2. The iron frame for a closed manhole cover according to claim 1, wherein the ring-shaped body is configured to have a size that matches a desired raised height.