JPS62148786A - Hanging ladder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) A manhole is provided on the floor of the upper floor for communication with the lower floor for evacuation, and within this manhole is a hanging ladder device that can be folded and stored. The present invention relates to such a hanging ladder.

(Prior art) There are many ladders that are used by combining two sticks in an x shape, connecting many more of the combined sticks, and folding and extending them in a pantograph style. When suspended, the pantograph made up of each rod has a rectangular shape and is fixed in place.

(Problem to be Solved by the Invention) As mentioned above, the ladder that maintains the pantograph structure in a rectangular state when suspended requires a number of stoppers placed horizontally so that the pantograph structure does not lose its shape. The structure is complicated and heavy. In addition, when a ladder is suspended, the ladder expands in a larger arc to the sides than when it is folded, and a heavy weight 1 is added to this, and the ladder is expanded due to the impact in the stopped state when it is suspended. Damage may occur.

This invention relates to a ladder configured in a pantograph style.
The present invention solves the above-mentioned drawbacks and provides a hanging ladder completed with a completely new idea.

(Means for Solving the Problems) This invention consists of assembling two rods in an X shape, connecting the two rods to each other with shafts, and connecting a large number of members assembled in the X shape to each other at both ends of the work. There are two hanging rods on the ladder that push the sardines in a bank graph style, and the length of the part of the persimmon in the left half of the cross axis, and the entire length of the persimmon, is slightly shorter than the length of the right half of the stick. A hanging ladder is characterized by a slightly curved V shape when the ladder is lowered.

this! i! Manhole A explaining the drawing of the example
is installed on the floor of the upper floor, and there is a ladder 1 inside this manhole A.
It can be stored at any time.

Ladder 1 consists of two rods, 2.3, arranged in an XK configuration, and their intersections are pivoted. Reference numeral 4 is probably the intersecting shaft part, and the members assembled in the X shape in this way are connected to each other at both ends of each [2, 3] to form a pantobluff 1R structure. , 5.6 +
t% This is the shaft that connects each rod.

This pantograph structure is called the vertical 'a7' of the ladder 1, and there are two on the left and right, and the inner vertical 'nA7 (only one is shown in the figure) is connected by a horizontal rung 8. The uppermost cross shaft portion 4a of the inner vertical bar 7 is pivotally supported on the mounting plate 15. The mounting plate 15 is provided inside the manhole A. A horizontal rung 8a at the bottom of the ladder 1 is supported by being placed on the upper latch 9a of the operating lever 9 when the ladder is stored. The operating lever 9 is mounted by a bearing 10 on the side wall to the manhole.

The upper latch 9b of the operating lever 9 is hooked onto a receiving metal fitting 12 of the manhole lower cover 11. Reference numeral 13 denotes a chain which connects the side wall of the manhole and the vertical bar 7 of the ladder, and when the ladder L is suspended as shown in Fig. 2, the chain 13 becomes tensioned and serves to prevent the ladder from swinging. are doing.

There are two chains 13 on the left and right sides of the ladder, and they are located at a position where they do not interfere with the person using the ladder. Connection part 13a between chain 13 and vertical bar 7
The direction in which the chain 13 is pulled up when folding the ladder 1 is
It is best to install it at the position of the bar that matches the folding direction.

In this invention, two rods 2 are used as shown in FIG.
and 3 and lcb, and the WiJ 3rd 3rd stage containing each cross axis ×
As the X' core, the length of the rod in the left half, ie, the length ta between the axis 5 and the cross axis 4, is made slightly shorter than the length tb of the rod in the right half. The rod to be slightly shortened is the cross axis 4
Regarding the three-half rods, the entire portion or a portion thereof may be selected as appropriate depending on the design.

(Function) The user opens the manhole top cover 14 and turns the operating lever 9. As a result, the lower cover 11 is removed from the upper latch 9b, and the lower cover 11 is opened (then, depending on the rotation angle of the lever 90, the horizontal run 8a is removed from the upper latch 9a, and the ladder 1 is moved from the shaft 4).
It unfolds and descends while rotating around a. At this time, in the ladder of the present invention, the pantograph structure first opens into a rectangular shape, but during rotation, it descends into a single rod shape, and is characterized by an extremely smooth descent.

When it is completely suspended, the left half of the rod is a short comb, which curves to the left and fixes it.

The degree of curvature is the extent to which a person can easily go up and down the ladder at a fixed time by hanging it, and the degree of curvature is determined by the length of the ladder and the difference in weight tastb. Therefore, for the difference in tastb, the appropriate number and size difference are determined depending on the design each time.

The curved ladder suspended in this way is descended from the upper part of the manhole A by stepping onto the horizontal rung 8 on the curved inner surface.
Ru. The ladder 1 will not bend any further in the direction of the curved outer surface (in other words, the direction in which the curvature is straightened) Tlc, and the swinging is stopped by the anti-sway chain 13, so the ladder is firmly fixed and the user can descend easily. To fold and store the railing ladder, turn the top bar end 3a of the vertical bar 7 in the direction in which the pantograph opens, or pull up the chain 13, and the vertical bar 7 will open into a pantograph shape. It can be easily opened and the ladder 1 can be folded and stored.

(Effects of the Invention) According to this invention, the ladder is foldable and expandable with the pantograph structure, and when unfolded, the ladder extends from one bar door, and when it is hung, it bends slightly toward the front, and when unfolded, it curves in an arc. It descends smoothly without moving downwards, and does not cause damage when stopped without strong impact.

When in use, it will not bend any further in the opposite direction due to the weight of your body, and will be firmly fixed, allowing you to use it with confidence in an emergency evacuation. Compared to a ladder with a rectangular pantograph,
It is a ladder with many advantages, such as using a minimum length bar to create a maximum length ladder, no extra members such as stoppers, and group analysis.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of a hanging ladder according to the present invention.
17. A side view of the hanging ladder stored in the manhole, Figure 2 is a side view showing the fixed place for hanging the hanging ladder of this invention, and Figure 3 shows only the main part, and it is assembled into , is a diagram illustrating the lengths of two rods. 2.3...Bar, 4...Cross axis No. 1) A. 3J, evening 7, page 18, Proceedings (self-motivated), January 30, 1985, Commissioner of the Patent Office, Mr. Ubuya Michibu, Incident Indication of 1985 patent 1+, fi No. 28
9224 No. 3, relationship to the case for amendment Patent applicant postal code 102' Telephone 237-753
44. Subject of amendment Contents of amendment In the column for detailed description of the invention, delete ``device'' from the 4th line from the bottom of the first vane, and insert the letter r in this deleted part, or a sign that hangs on the window of a building or the handrail of a balcony. First, add the hanging ladder you will be using.

Claims (1)

[Claims] By assembling two rods in an X shape, attaching the intersection to a shaft, and connecting the many members assembled in this X shape to each other at both ends of the rod, a hanging ladder that extends and retracts like a pantograph is constructed to the left of the cross axis. A hanging ladder characterized in that a part or all of the bars in each half are slightly shorter in length than the bars in the right half, so that the ladder has a slightly curved shape when the ladder is suspended.