JPH0242948U

JPH0242948U -

Info

Publication number: JPH0242948U
Application number: JP12044288U
Authority: JP
Priority date: 1988-09-16
Filing date: 1988-09-16
Publication date: 1990-03-26

Description

[Brief explanation of drawings]

第１図は受枠に梯子を格納した状態の平面図、
第２図は同上一部を分解して示す斜面図、第３図
イは同上縦断側面図、第３図ロは梯子を直立させ
た状態の同上縦断側面図、第３図ハは同上縦断正
面図、第４図は梯子の他例を受枠に組立てる状態
の斜視図である。 Figure 1 is a plan view of the ladder stored in the receiving frame.
Figure 2 is a partially exploded perspective view of the same as above, Figure 3 A is a longitudinal side view of the same, Figure 3 B is a vertical side view of the same with the ladder upright, and Figure 3 C is a longitudinal front view of the same. FIG. 4 is a perspective view of another example of the ladder assembled to the receiving frame.

Claims

[Scope of utility model registration request]

Bearings 4, 5 and 6 horizontally support both ends of support rods 2 and 3 having the same axial direction on one inner wall.
The bearings 4 and 6 on both sides have vertical shaft holes 4 into which the legs 11 and 12 of the ladder 10 are respectively fitted.
A and 6a are opened, and a receiving frame 1 of a manhole cover is provided with catches 7 and 8 that lock the tip of the ladder 10 when the ladder 10 is folded down on the other side of the inner circumference, and a receiving frame 1 of the manhole cover is provided on the base of both sides when the ladder 10 is upright. The legs 11 and 12 are fitted into the vertical shaft holes 4a and 6a of the bearings 4 and 6 so that their tips face the bearings 4 and 6 when they are folded down, and the long grooves 13 and 14 that engage with the support rods 2 and 3 are provided. Guides 15 formed respectively
1. A manhole climbing ladder device comprising: a ladder 10 provided with a ladder 10 and a ladder 16;