JPS6219840Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is installed, for example, on the balcony or floor of an overhang of a high-rise building or a general residential building, and is used in the event of an emergency evacuation such as a fire. and relates to an evacuation ladder device equipped with a retractable pantograph type ladder.

(Prior Art) Conventionally, the pantograph type ladder, which is generally used in this type of evacuation ladder device, has links that are pivotally connected in an X shape, and a plurality of links are connected in the vertical direction. It is constructed by connecting the intersection points or connection points of the X-shape with cross members in pairs facing each other.

A ladder assembled in a pantograph style can be easily expanded and contracted, and when shortened, it becomes very compact and easy to store.
It is often used.

However, in this type of pantograph ladder, a clearance is provided in advance at each pivot point or each connection point so that the ladder can immediately go from a shortened state to an extended state in the event of an emergency evacuation such as a fire.

For this reason, when an evacuee descends along the ladder, there is a problem in that the ladder bends back and forth and swings in the same direction. In other words, when evacuees descend, they pull the parts they are holding onto with their hands toward their hands, and conversely, push their legs forward as they descend, causing the parts they are holding onto to curve and flex. The ladder will swing as it descends. As a result, evacuees may miss their footing on the ladder and fall, or the evacuees may feel uneasy due to the swinging of the ladder, making it difficult for them to descend smoothly, which is an extremely serious drawback in terms of safety measures.

In addition, pantograph-type ladders tend to lose their shape at the top when the load of evacuees is applied to the lower end, and the ladder can suddenly reach its full height, giving evacuees a big shock, resulting in safety issues. There was a problem that was missing. Therefore, ladders have come to be provided with means for restricting the extension of the ladder from exceeding a certain length. For example, a method is adopted in which the distance between each cross member of a ladder is controlled so that it does not exceed a certain length when the ladder is extended by connecting each cross member of the ladder with a chain of a certain length. There is.

In this way, pantograph-type ladders equipped with regulating means are designed to prevent the extension from exceeding a certain length even if an unreasonable load is applied during extension, and are excellent in safety. However, the disadvantage is that the structure of the ladder itself is complicated, the construction is troublesome, and the manufacturing cost increases significantly.

(Problems to be Solved by the Invention) The present invention was devised to solve the above-mentioned problems, and it prevents the ladder from bending and swinging when the ladder is extended, and is extremely effective. To provide an evacuation ladder device equipped with a pantograph type ladder capable of regulating elongation due to deformation by a simple mechanism.

(Means for Solving the Problems) The evacuation ladder device of the present invention includes a frame member formed from at least one horizontal member and a pair of vertical members, and an inner portion of the frame member and an approximately intermediate portion of the vertical members. A pantograph-type ladder is constructed by arranging a plurality of framework bodies in the vertical direction and consisting of linear members pivotally connected to each other, and assembled in a telescopic manner by pivotally connecting both ends of each linear member to both ends of each vertical member, respectively.
The pantograph type ladder is installed so that it can be stored freely in a storage box embedded in the floor of the building and hangs down when extended. The horizontal member abuts against the end of each linear member to restrict its extension, and is characterized in that a descending means is provided between the storage box 2 and the pantograph ladder to moderate the extension speed of the pantograph ladder. There is.

(Function) Therefore, in the event of an emergency evacuation such as a fire, if the pantograph type ladder stored in the storage box is lowered,
A pantograph ladder gradually extends due to its own weight.
At this time, the extension speed of the pantograph ladder is moderated by the descending means, so that the pantograph ladder does not extend suddenly. As a result, no impact load is applied to each pivot point of the pantograph ladder, and damage to the ladder can be prevented.

When the pantograph ladder extends to a certain length, the horizontal members of each frame member come into contact with the ends of each straight member, restricting its extension, and the frame members and straight members touch each pivot point. Rotation around the center is prevented. As a result, the pantograph ladder itself becomes rigid, and the ladder itself does not bend or swing, allowing evacuees to evacuate extremely safely.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

1 and 2 show an evacuation ladder device 1 according to a first embodiment of the present invention, the main parts of which are comprised of a storage box 2, a pantograph type ladder 3, etc. accommodated therein.

The storage box 2 includes a main body 9 that is framed in a rectangular planar shape by four upright plates 5, 6, 7, and 8 on the front, rear, left, and right sides to form an evacuation exit 4, and a front upright plate 5 of the main body 9. a top lid 10 that is pivotally attached to the top and can be opened from the top;
It is comprised of a lower lid 11 which is pivotally attached to the lower part of the front upright plate 5 and can be opened downward, and a synchronization interlocking mechanism 12 which synchronizes the opening and closing operations of the upper lid 10 and the lower lid 11. Incidentally, as the storage box 2, for example, the one disclosed in Japanese Patent Publication No. 53-27600 can be adopted.

The storage box 2 is fixed by fitting the main body 9 into an opening 14 made in the floor surface 13 of a balcony or overhang of a high-rise building or a general residential building.

As shown in FIG. 6, the pantograph ladder 3 includes a frame member 17 consisting of one horizontal member 15 and a pair of vertical members 16, and a pair of linear members 19 each pivotally connected 18 to the frame member 17. A framework body 20 composed of
A plurality of framework bodies 20 are arranged in the vertical direction and each frame body 20 is connected to each other.

Specifically, the frame body 20 is formed by making the horizontal members 15 and vertical members 16 from square pipes, and fixing the ends 16' of a pair of vertical members 16 to both ends of the horizontal members 15, respectively. It is composed of an octopus-shaped frame member 17 and a rectilinear member 19 made of a square pipe which is pivotally connected 18 to the inner part of the frame member 17 and to the intermediate part of the vertical member 16.

The pantograph ladder 3 has a plurality of framework bodies 20 arranged in the vertical direction, and one end 19'' of the linear member 19 of each framework body 20 is connected to the end of the vertical member 16 on the side to which the horizontal member 15 is fixed. 16', and the other end 19' is pivotally connected 18 to the end 16'' of the vertical member 16 on the side to which the cross member 15 is not fixed.
By doing this, it can be assembled in a flexible manner. This so-called ladder 3 is assembled in a pantograph style.

Furthermore, when the pantograph type ladder 3 is extended, each vertical member 16 and each linear member 19 become substantially in a straight line, that is, the ends 16' and 16'' of each vertical member 16 in FIG. and until the ends 19' and 19'' of each straight member 19 are close to each other,
Each horizontal member 15 is configured to abut against the end 19'' of each straight member 19 and its extension is restricted. Therefore, when the pantograph type ladder is extended to a certain length, the extension is restricted. It will be regulated.

The pantograph type ladder 3 is installed so that it can be freely stored in a storage box 2 embedded in a floor surface 13 and is in a hanging state when extended.

Specifically, the linear member 1 of the uppermost frame body 20
9 and the support rods 22, 2 that connect the vertical members 16, respectively.
1 is attached to a guide plate 23 provided in the storage box 2, as shown in FIG. That is, a pair of guide plates 23 having elongated holes 24 are fixed horizontally and in parallel to the main body 9 of the storage box 2, and both ends of the support rod 21 connecting the vertical members 16 are attached to the guide plates 23. Both ends of a support rod 22, which is pivoted on the front side and connects the linear members 19, are inserted into the elongated holes 24 of the guide plate 23 and are slidably attached. By attaching the support rods 21 and 22 to the guide plate 23 on the same horizontal plane, the pantograph ladder 3 is in a hanging state as shown in FIG. 1 when extended.

A lowering means 25 is provided between the storage box 2 and the pantograph type ladder 3 so that the pantograph type ladder 3 does not extend suddenly when the pantograph type ladder 3 is extended. Further, a winder 26 is attached to the storage box 2 to bring the extended ladder 3 into a shortened state.

In this embodiment, the lowering means 25 uses a coil spring 27, which is interposed between a part of the guide plate 23 and an arbitrary pivot point 18 of the ladder 3.

The winding machine 26 is configured to rotate a drum 29 rotatably supported by a bracket 28 fixed to the upper lid 10 of the storage box 2, a wire rope 30 wound around the drum 29, and the drum 29. The tip of the wire rope 30 is connected to the free end 32 of the ladder 3.
is fixed to.

In addition, 33 is a band wrapped around the ladder 3 in order to maintain the shortened state of the ladder 3.

Next, the operation of the evacuation ladder device will be explained.

Pantograph type ladder 3 is always connected to Figures 3 and 4.
As shown in the figure, it is housed in a storage box 2.

In the event of an emergency such as a fire, evacuees can open the top lid 1 of storage box 2.
When the cover 0 is opened, the lower cover 11 is also opened by the operation of the synchronous interlocking mechanism 12. Next, after confirming the situation downstairs, the band 33 wrapped around the ladder 3 is removed. Due to its own weight, the support rod 22 attached above the ladder 3 is moved to the guide plate 22 as shown in FIG.
While sliding in the elongated hole 24 in the direction of arrow A, it gradually extends while approaching the other support rod 21.

At this time, the pivot point 18 of the ladder 3 and the guide plate 23
Since the coil spring 27 is interposed between the ladder 3 and the ladder 3, the ladder 3 does not extend suddenly. Therefore, no impact load will be applied to each pivot point 18 of the ladder 3, and the ladder 3 will not be damaged.

Then, when ladder 3 extends to a certain length, the fifth ladder
As shown in the figure, the horizontal members 15 of each frame member 17 abut against the end portions 19'' of each linear member 19 to restrict their extension, and the frame members 17 and linear members 19 contact each pivot point 18. This prevents the ladder from rotating around the center.Therefore, the ladder 3 itself becomes a rigid body, and the ladder itself does not bend or swing, allowing evacuees to evacuate extremely safely. can do.

Note that when the horizontal members 15 of each frame member 17 come into contact with each linear member 19 and the extension of the ladder 3 is restricted, the support rod 2 inserted into the elongated hole 24 of the guide plate 23
2 so that the sliding movement of the guide plate 23 is stopped.
By setting the length of the elongated hole 24, the guide plate 2
3 also restricts the extension of the ladder 3, and the effects described above become even more remarkable.

On the other hand, when storing the ladder 3 in the storage box 2 after using it, the winder 26 attached to the storage box 2 may be used. That is, the drum 29 of the winder 26
The free end 32 of the ladder 3 is connected to the drum 29 by turning the handle 31.
When the ladder 3 is rotated and the wire rope 30 is wound around the drum 29, the support rod 22 attached above the ladder 3 slides in the long hole 24 of the guide plate 23 in the direction opposite to the arrow A. , are sequentially shortened and re-stored in the storage box 2.

In the above embodiment, the pantograph type ladder 3
Although the frame member 17 of the frame body 20 constituting the frame body 20 is formed into a U-shape, in another embodiment, the frame member 17 is formed into a U-shape.
It may be formed into a rectangular shape as shown in the figure.

That is, the ladder 3 according to the second embodiment of the present invention, as shown in FIG. , at the inner part of the frame member 17 and the longitudinal member 16
A plurality of framework bodies 20 each consisting of a linear member 19 fixed to an intermediate portion of the frame bodies 20 are arranged in the vertical direction.
It is constructed by concatenating 0's.

Therefore, when ladder 3 extends to a certain length, the 8th
As shown in the figure, each of the horizontal members 15 comes into contact with the ends 19' and 19'' of each linear member 19, so that their extension is restricted and the rotation of the frame member 17 and the linear member 19 is also prevented. In this case, since there are more contact points than in the above-mentioned ladder 3, the ladder 3 itself becomes even more rigid, and there is no possibility that the ladder 3 will bend or swing.

(Effects of the invention) As is clear from the above explanation, the invention has the following effects:
When the pantograph type ladder installed in the evacuation ladder device is extended, each horizontal member comes into contact with the end of each straight member and restricts the extension until each vertical member and each straight member become substantially in a straight line. Because of this structure, the ladder does not lose its shape when extended.
It can make itself rigid. As a result, the ladder itself can be prevented from bending or swinging, allowing evacuees to ascend and descend safely. Further, since this ladder can restrict excessive extension without providing the restriction means mentioned at the beginning, the structure is simple and assembly can be performed easily. Furthermore, since the pantograph type ladder is attached to the storage box so as to hang down when extended, the space between the upper and lower floors can be narrow, and the overall length of the ladder can also be shortened.
However, since a lowering means is provided between the storage box and the pantograph-type ladder to slow down the extension speed of the ladder, the ladder does not extend suddenly and an impact load is applied to each pivot point. Not at all. As a result, the ladder is not damaged during its extension.

[Brief explanation of the drawing]

Figure 1 is a longitudinal side view of the evacuation ladder device with the upper and lower lids of the storage box opened and the pantograph ladder extended; Figure 2 is a front view of the storage box partially cut away; FIG. 3 is a plan view of the stored state with the top lid omitted, FIG. 4 is a schematic longitudinal side view showing the stored state, and FIG. 5 is a vertical cross-sectional view taken along the line V-V in FIG. 2.
6 is a perspective view of a pantograph-type ladder, FIG. 7 is a perspective view of a pantograph-type ladder showing another embodiment, and FIG. 8 is a longitudinal cross-sectional view of the same ladder as FIG. 5. 1 is an evacuation ladder device, 2 is a storage box, 3 is a pantograph type ladder, 115 is a horizontal member, 16 is a vertical member, 17 is a frame member, 19 is a linear member, and 20 is a framework body.

Claims (1)

[Scope of utility model registration request] A framework composed of a frame member 17 formed from at least one horizontal member 15 and a pair of vertical members 16, and a linear member 19 pivotally connected 18 to an inner portion of the frame member 17 and approximately at the middle portion of the longitudinal member 16. A pantograph type ladder in which a plurality of bodies 20 are disposed in the longitudinal direction, and both ends 19', 19'' of each straight member 19 are pivotally connected 18 to both ends 16', 16'' of each vertical member 16, so as to be expandable and retractable. 3
is attached so that it can be stored freely in a storage box 2 embedded in the floor surface 13 of the building and is in a hanging state when extended, and the pantograph type ladder 3 has each vertical member 16 and each linear member 19 in a substantially straight line when extended. By the time the horizontal member 15 reaches the end 19'' of each linear member 19, its extension is restricted, and the extension of the pantograph ladder 3 is prevented between the storage box 2 and the pantograph ladder 3. An evacuation ladder device characterized by being provided with a gradual descending means 25 for reducing speed.