JPH0187768U

JPH0187768U -

Info

Publication number: JPH0187768U
Application number: JP18505187U
Authority: JP
Priority date: 1987-12-03
Filing date: 1987-12-03
Publication date: 1989-06-09

Description

[Brief explanation of the drawing]

図面はこの考案の一実施例を示すもので、第１
図は全開状態の斜視図、第２図は、全閉状態の中
央縦断側面図、第３図は上蓋を４５°開いたとき
の中央縦断側面図、第４図は９０°全開したとき
の中央縦断側面図で、合わせて設置状態を示した
図、第５図、第６図はリンクの動きを説明するた
めの概略線図で、第５図は第２図の全閉状態、第
６図は第４図の全開状態を示す図である。１…枠体、３…上蓋、４…下蓋、５，６…枢軸
、７…第１リンク、８…補強板、９…枢軸、１０
…第２リンク、１１，１２…枢軸、１３…第３リ
ンク、１４…ブラケツト、１５，１６…枢軸、１
７…ストツパー。 The drawing shows one embodiment of this invention.
The figure is a perspective view of the fully open state, Figure 2 is a center longitudinal side view of the fully closed state, Figure 3 is a center longitudinal side view of the top cover when it is opened at 45 degrees, and Figure 4 is the center view when it is fully opened at 90 degrees. This is a vertical side view, and also shows the installed state. Figures 5 and 6 are schematic diagrams to explain the movement of the link. Figure 5 is the fully closed state of Figure 2, and Figure 6 is a diagram showing the installed state. 4 is a diagram showing the fully open state of FIG. 4. FIG. DESCRIPTION OF SYMBOLS 1... Frame body, 3... Upper cover, 4... Lower cover, 5, 6... Pivot, 7... First link, 8... Reinforcement plate, 9... Pivot, 10
...Second link, 11,12...Pivot, 13...Third link, 14...Bracket, 15,16...Pivot, 1
7... Stopper.

Claims

[Scope of Claim for Utility Model Registration] A rectangular frame of a size large enough for people to pass through, which is buried in the floor of a building, balcony, etc., is provided, and a top cover is pivoted at one end to the upper end of the frame. At the same time, a lower lid is provided at the lower end, and one end is pivotally connected to the side opposite to the pivoting part of the upper lid, and on the back side of the upper lid at a position near the upper lid pivoting part,
a first link having one end pivotally connected; a second link having one end pivotally connected to a position near the upper lid pivoting portion and the lower end of the inner wall perpendicular to the upper lid pivoting portion of the frame;
The first link and the second link have one end pivotally connected to a bracket protruding from the lower lid pivot portion on the back side of the lower lid.
A third link longer than the link is provided, and the first link is provided.
The other ends of the link and the second link are pivotally connected to each other, and the other end of the third link is pivotally connected to the middle of the second link, so that when the upper cover and the lower cover are closed, the middle of the second link point and the other end of the third link from a straight line connecting the pivot point of the second link to the frame and the pivot point of the third link to the bracket. and when the upper and lower lids are fully opened to approximately 90 degrees, the third link and the bracket are positioned at a pivot point between the frame and the lower lid, and A stopper is located below the straight line connecting the middle of the second link and the pivot point of the other end of the third link, and is in contact with the lower side of the third link, and is provided protruding from the frame. A building evacuation hatch that is characterized by: