JPH0131760Y2 - - Google Patents

Description

[Detailed explanation of the invention] In this case, the main body of the ladder is connected to the hatch on the floor of the upper floor of the building, and is suspended along the wall of the lower floor during normal times. This invention relates to an evacuation ladder that can be moved downward and grounded to facilitate emergency evacuation from upper floors. Buildings with two or more floors are often equipped with evacuation ladders for emergency evacuation in the event of an earthquake, fire, etc.

This type of evacuation ladder has a non-extensible structure that connects the upper and lower floors, i.e., a ladder with a structure that has many steps installed between a pair of side rungs. Most of the ladders are fixedly attached to the wall of the lower floor with the main body facing out.

A ladder that is attached to a wall in this way is
Generally, it is installed vertically near one wall of the hatch, and when looking down from above the hatch, the area directly below the hatch forms a complete space, which gives a sense of fear, and it is even more difficult to move onto the ladder. Also from
Vertical ladders have drawbacks such as being difficult to climb down, being dangerous, and lacking in swiftness of action.

This proposal was made to solve the above-mentioned drawbacks, and the main body of the ladder is configured to be movable from the wall side of the building to directly below the hatch, and the lower end is connected to the front wall of the hatch while the upper end is connected to the rear wall of the hatch. The ladder is moved greatly downward and the entire ladder is sloped directly below the hatch, thereby eliminating fear and providing a ladder that can be used safely by anyone.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a ladder main body, which has a large number of steps 3 installed on a pair of left and right side bars 2, and each wheel 4 is attached to the lower end of the side bars.

Reference numeral 5 denotes an operating member pivotally connected to a bracket 6 protruding from the rear wall of hatch A whose intermediate point is opened on the upper floor surface of the building. The shaft portion 7b having a rectangular cross section is loosely inserted, and the shaft portion 7b is inserted at the end point when the operation member 5 is raised.
is made to fall into a long hole portion 7c connected to the circular hole 7a. Reference numeral 8 denotes a pin protruding from the lower half 5a of the operating member 5, which is fitted into a long hole 9 formed longitudinally in the upper end of the side rod of the ladder main body 1, and is connected to the lower half end of the ladder body 1. is provided with a locking portion 10 that projects laterally and comes into contact with the rear edge of the side rod, and the upper half portion 5b forms a handle 11 that can be moved in and out of the hatch.

However, when the operating member 5 is operated to lie down and its upper half 5b is housed and held within the hatch, the ladder main body 1 is suspended in the air and drawn toward the wall surface B of the lower floor. Then, when the hatch lid C is opened and the handle 11 of the operating member 5 is pulled out from inside the hatch, the rolling wheels 4 of the ladder main body 1 that are suspended in the air touch the floor surface D of the lower floor, and the ladder main body 1 The downward movement of the lower half portion 5a stops, and the locking portion 10 is brought into contact with and locked to the rear edge of the side rod 2 by the subsequent movement of the lower half portion 5a. At this point, the operation of raising the operating member 5 continues, and as the lower half 5a of the operating member 5 is rotated downward, the pin 8
The upper part of the side rod 2 is pushed forward under the two-point support of the pin 8 and the locking part 10 while moving downward in the elongated hole 9, and the hatch A as a whole is moved forward downward.

During this movement, the forward pushing force by the locking portion 10 acts to a great extent, causing the lower end of the side rod 2 to move significantly, eventually making the ladder body 1 inclined. After this inclination, the weight of the ladder main body 1 acts on the wheel 4 to push the wheel 4 and increase the angle of inclination, and at the position where the operating member 5 has finished operating, the pin 8 reaches the upper end of the elongated hole 9. At the pivot point 7, the shaft part 7a falls into the elongated hole part 7c, and the operating member 5 also falls to a locked state, and the ladder main body 1 is tilted and stabilized directly below the hatch A without wobbling. and is made available for use.

Therefore, in this case, when looking down on the ladder from above hatch A, one can see the sloping ladder directly below the hatch, and in an emergency, one can climb onto it without any sense of anxiety or fear. Moreover, even when taking actions after getting on the ladder, the ladder is moderately inclined, so unlike descending from a conventional vertical fixed ladder, you can move safely and quickly by putting your weight on the ladder.

In addition, under normal conditions when the hatch lid is closed, the ladder on the lower floor is suspended in the air and pulled toward the wall for storage. Compared to the type that is fixed to a longer support arm, etc., the space below the hatch can be used more spaciously.

In other words, in normal times, the ladder is pulled as close to the wall as possible and stored so that it does not get in the way, and in an emergency, it can be moved directly below the hatch with a simple operation from the hatch and fixed in an inclined position. It is easy to set up and use, has a simple structure, can be provided at low cost, and has great practical effects such as no special processing required for buildings in terms of installation.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of the present invention in normal conditions, FIG. 2 is a vertical cross-sectional view during use, and FIG. 3 is an explanatory diagram of the operation. DESCRIPTION OF SYMBOLS 1...Ladder body, 2...Side rod, 3...Step, 4...Rolling wheel, 5...Operation member, 6...Bracket, 7...Pivot part, 8...Pin, 9...Length hole,
10...Locking portion, 11...Handle, A...Hatch, B...Wall, C...Hatch lid, D...Floor surface.

Claims (1)

[Scope of utility model registration request] The main body of the ladder has a large number of steps between a pair of left and right side beams with rolling wheels attached to the lower end, the middle point is pivoted to the inner wall of the hatch, and the lower half of the ladder is connected to the protruding pin. An operation in which a long hole drilled longitudinally in the upper part of the side rod is inserted and connected, and the lower half has a locking part that comes into contact with the rear edge of the side rod, and the upper half has a handle. When the handle of the operating member is operated to lie down in the hatch, the ladder body is suspended in the air and removed from the hatch position, and when the handle is operated to stand up, the rolling wheels touch the ground in the middle of the operation, and An evacuation ladder characterized in that the locking portion locks on the side beam and pushes it forward to make the ladder body slope.