JPH0571282A - Escape ladder - Google Patents

Abstract

PURPOSE:To obtain a lightweight escape ladder having high strength, to reduce a number of components and to make it possible to promote safety. CONSTITUTION:Muntins 11 is formed of channel-shaped members. End grain closing sections 18 covering end grain openings are lent from the ends of the muntins 11 and are formed together as a unit on the ends of end grains of the muntins 11. The end grain closing sections 18 are constituted of base sections 18a bent so as to cover the end grain openings of the muntins 11 and bending pieces 18b bent so as to butt against the end grains of the muntins 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an evacuation ladder, and more particularly to a foldable evacuation ladder attached to a storage frame installed on a balcony of an apartment house or office building.

[0002]

2. Description of the Related Art A conventional evacuation ladder is, for example, a pair of vertically extending telescopic members formed by connecting a plurality of vertical rails in a pantograph shape, and arranged at appropriate positions between the elastic members. It is known that a plurality of horizontal rails for supporting legs are connected to the vertical rails, and each vertical rail is generally composed of a flat bar (Actually, Shokai 6).
No. 0-124500).

[0003]

However, in the conventional evacuation ladder of this type, it is necessary to increase the thickness dimension in order to secure the rigidity of the vertical rail constituted by the flat bar. There is a problem that the weight of the When the weight of the ladder is large, there is a problem that the impact force on the ladder becomes large at the time of extension and durability becomes a problem, and it takes time and effort to fold and store the extended ladder. As a means for solving this problem, it is conceivable to use a channel-shaped vertical bar formed by bending a sheet metal. However, in this channel-shaped vertical bar, the cut portion is exposed at the edge of the fore edge, so when evacuation is required. There is a risk that your hands will be injured and clothing will be caught. Therefore, it has been necessary to perform a complicated process such as removing the burr at the edge portion of the vertical crosspiece by finishing work such as sanding, or attaching a cap to the edge portion of the vertical edge. However, in the case where the end portion on the fore edge side is simply sanded or the cap is attached to the end surface of the fore edge in a contact state, it is not sufficient as a safety measure.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an evacuation ladder which is lightweight, has high strength, can reduce the number of parts, and can improve safety. It is what

[0005]

In order to achieve the above object, an evacuation ladder according to the present invention comprises a pair of vertically extending telescopic members formed by connecting a plurality of vertical bars in a pantograph shape. In an evacuation ladder provided with a plurality of horizontal rails for footing, which are arranged at appropriate positions between elastic bodies and which are connected to the vertical rails, the vertical rails have a channel-shaped cross-sectional shape, and the ends of the vertical rails. In the part, a base part that is bent so as to cover the opening of the vertical crosspiece and a closing piece that is bent from both side edges of the base part that is bent so as to abut against the vertical crosspiece mouth is integrally formed. It was done.

In the present invention, the wood mouth closing portion is a base portion which is bent at the end of the vertical rail so as to cover the wood mouth opening of the vertical rail, and is abutted against the wood mouth of the vertical rail from both side edges of the base portion. Although it may be any as long as it is composed of a bending piece that can be bent as described above, it is preferable that the bending portion has an arc shape, and it is more preferable that the bending line and the folding line of the base portion are formed. It is better to form a notch near the intersection with the bending line of the bent piece.

[0007]

According to the evacuation ladder of the present invention configured as described above, since the vertical rail has a channel-shaped cross section, it is possible to reduce the weight and obtain high strength.
Since the connecting member does not fit inside the vertical rail and is not exposed to the outside, safety can be improved.

Further, by covering the opening of the vertical crosspiece with the closing part of the vertical crosspiece, it is not necessary to perform a complicated deburring process without exposing the end of the vertical crosspiece. Moreover, since the wood mouth closing portion is formed integrally with the end portion of the vertical rail, the number of parts can be reduced.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic perspective view showing the whole of the evacuation ladder of the present invention in a used state, and FIG. 2 is a cross-sectional view showing the whole in the stored state.

The evacuation ladder 10 of the present invention comprises a pair of vertically extending telescopic bodies 12 and 12 formed by connecting a plurality of vertical bars 11, 11, ... In a pantograph shape, and the telescopic bodies 12, 12. Vertical bars 11 and 11 arranged at appropriate positions between
, And a plurality of cross rails 13, 13, ... The top vertical bar 11 of this ladder 10 is
It is pivotally attached to a mounting member 4 fixed to the inner side surface of a storage frame 3 fitted and fixed through a seal member (not shown) into a slab opening 2 formed in a slab 1 such as a floor or a veranda. ..

An upper lid 5 on the floor side of the slab opening 2 and a lower lid 6 on the ceiling side of the floor immediately below the slab 1 are pivotally attached to the storage frame 3 so as to be opened and closed. The upper lid 5 and the lower lid 6 are connected to each other via a link device 7. When the upper lid 5 is opened upward, the upper lid 5 holds the upright posture and the lower lid 6 interlocks. And is automatically opened downward. Further, a slowing-down device 8 is provided at the tip of the ladder 10. This slow-moving device 8 is equipped with a ratchet mechanism containing a take-up drum (not shown). The wire rope 8b wound around the take-up drum is installed between the vertical bars 11, 11 on the lower end side of the ladder 10. It is connected to the horizontal rod 15 via a hook 9.
When the upper and lower lids 5 and 6 are opened by the slowing-down device 8, the ladder 10 extends and descends under control, and the ladder 10 is pulled up by the winding of the wire rope 8b and stored in the storage frame 3. It is supposed to be done.

The vertical bars 11, 11, ...
The horizontal bars 13, 13, ... Are formed in a channel shape by bending a metal plate such as stainless steel or steel, as shown in detail in FIGS. The elastic body 12 is formed by stacking the inner vertical rails 11 and the outer vertical rails 11 back to back in an X-shape so that the vertical rails 11, 1
The connecting member such as the rivet 16 is inserted from the inside through the washer 16a into the hole portions 11a formed at the intersection of the central portions of 1 to fasten the connecting member, and the two connecting members are connected in an X shape. A plurality of vertical bars 11, 11 are arranged in the up-down direction and the ends of the vertical bars 11, 11 are overlapped with each other, and a hole 11 is formed near the ends of the vertical bars 11, 11.
It is formed by inserting and fastening the rivet 16 in b and 11b. In this case, the head and the fastening portion of the vertical rail connecting rivet 16 can be housed within the channel cross section of the vertical rail 11. Further, one of the two vertical bars 11, 11 connected in the X shape at the uppermost part and the lowermost part of the ladder 10 is formed shorter than the other vertical bars 11, 11, ....

Since the vertical crosspieces 11, 11, ... And the horizontal crosspieces 13, 13, .. The overall weight can be reduced and the ladder 1
When 0 is stored, it can be easily operated without requiring a large force. Moreover, in addition to being able to form the corner portion of the vertical rail 11 into the arcuate shape R, the head and the fastening portion of the rivet 16 are accommodated within the channel cross section of the vertical rail 11 and are not exposed to the outside, so the vertical rail 11 is evacuated during evacuation It is safe because even if you squeeze it, your hands will not be injured and clothing will not be caught.

At least one of the vertical rails 11 to be connected (in this embodiment, the vertical rail 11 located outside is shown) is connected to the connecting portions on the center side and both sides. The other vertical bar 11 is provided around the perforations 11a and 11b.
Ridge 17 embossed to project toward
a and 17b are integrally formed. In this case, each raised portion 17a, 17b has an eccentric shape so as to cover an area corresponding to the overlapping margin of the vertical bars 11, 11. Specifically, as shown in FIG.
17a located in the central portion of the vertical ellipse has an elliptical shape centered on the hole 11a, and the raised portion 17b located near the end of the vertical bar 11 is an ellipse centered on the point eccentric from the hole 11b. It has a shape. Therefore, it is possible to reduce the number of parts and facilitate the work of attaching the vertical rails 11, 11.

On the other hand, the end portion of the vertical bar 11 (in this embodiment,
At the upper and lower ends of the vertical rails 11 located on the outer side and the upper ends of the vertical rails 11 located on the inner side, the mouth of the vertical rails 11 (edge portion)
A base portion 18a that is bent to cover the
A wood-mouth closing portion 18 composed of bent pieces 18b, 18b that are bent so as to abut against the wood mouth of the vertical crosspiece 11 from both side edges of a is integrally formed. Such a tree mouth closing part 1
8 is a vertical bar 1 formed by bending a thin metal plate.
It is formed at the same time when 1 is molded. That is, vertical bar 1
After the base 18a is bent at a right angle from the end of the base 1,
A metal for forming the vertical crosspiece 11 by bending the bent pieces 18b, 18b at a right angle from the end of 8a and abutting the ends of the bent pieces 18a, 18b against the edge of the vertical crosspiece 11 at the mouth end. The cut surface of the plate is formed so as not to be exposed to the outside.

Further, notches 18c, 18c are formed near the intersection of the bending line of the base portion 18a and the bending line of the bending pieces 18b, 18b of the above-mentioned wood mouth closing portion 18. By forming such notches 18c and 18c, it is possible to easily perform the bending process, and it is possible to suppress a liquid pool when performing surface treatment such as plating after forming the vertical rail 11.

Further, the wood mouth closing portion 18 is formed by bending the base portion 18a from the vertical crosspiece 11 and bending pieces 18 from the base portion 18a.
At the time of bending b, 18b, the corners thereof are formed into an arcuate shape R, and safety is taken into consideration.

The horizontal rails 13, 13, ... Are shown in FIGS.
As shown in FIG. 5, stopper bolts 20 are connected to the lower ends of the vertical rails 11, 11 located inside through a substantially L-shaped joint fitting 19. Further, a plurality of uneven portions 23, 23, for slip prevention are integrally formed in a zigzag manner on the horizontal piece 13a for hanging on the cross rail 13 by embossing. As a result, it is possible to suppress slipping of the feet during evacuation without attaching a separate anti-slip sheet or the like on the horizontal piece 13a of the horizontal rail 13, and further improve safety.

The joint fitting 19 is a flat plate-shaped horizontal piece 1.
9a, a pair of vertical pieces 19b and 19b extending downward from both edges of one end of the horizontal piece 19a, and from the inner edge of one vertical piece 19b to the inner edge of the other vertical piece 19b. The washer portion 19c extending in the vertical direction is formed by bending a thin plate. In this case, the horizontal piece 19a
Has a hole portion 19d formed in contact with the back surface of the horizontal piece 13a for footrest of the horizontal rail 13 and aligned with the hole portion 13c formed in the horizontal piece 13a.
The rivets 21 and 21 are inserted into and fastened to the c and 19d, so that the rivets 21 are mounted in the cross rail 13. Also, the vertical piece 19
b is brought into contact with the back surfaces of the vertical pieces 13b, 13b of the horizontal rail 13, and a hole portion 19e for attaching a stopper bolt is formed in the central portion of the washer portion 19c.

The stopper bolt 20 is formed by coaxially forming a large-diameter disk-shaped stopper portion 20a, a shaft portion 20b, and a screw portion 20c. The shaft portion 20 of the stopper bolt 20
b is fitted into a hole 11c formed at the lower end of the vertical crosspiece 11, and a flat washer 22a and a spring washer 22 for loosening the screw 20c inserted into the hole 19e of the joint fitting 19 are provided.
By fastening the nut 22 via b,
The vertical bar 11 is fixed, and the stopper portion 20a is fixed to the outside of the vertical bar 11 located inside. By providing the stopper portion 20a in this way, when the ladder 10 is extended, the stopper portion 20a abuts the side surface of the vertical crosspiece 11 located on the outer side, restricts the extension movement, and expands and contracts the telescopic bodies 12, 12. The posture during extension can be determined.

A horizontal projection 24 is formed at the end of the horizontal piece 13a of the horizontal rail 13, and a slit 25 that engages with the horizontal projection 24 is formed at a predetermined position on the vertical rail 11. By engaging the horizontal projections 24 with the slits 25 in this manner, the horizontal rails 13 can be temporarily fixed to the vertical rails 11 to facilitate the work, and to increase the mounting rigidity of the horizontal rails 13 to the vertical rails 11. You can

In the above embodiment, the raised portions 17a, 17a
Although b is formed only on the vertical bar 11 located on the outer side, it may be formed only on the vertical bar 11 located on the inner side or on both vertical bars 11, 11.

[0024]

As described above, since the evacuation ladder of the present invention is constructed as described above, the following effects can be obtained.

1) By making the cross-section of the vertical crosspiece into a channel shape, it is lightweight and has high strength, and even if the vertical crosspiece is gripped at the time of evacuation, it is safe without scratching hands or catching clothes. ..

2) Since the wood mouth closing portion that covers the mouth opening of the vertical rail is integrally formed at the end portion of the vertical rail, the end portion of the vertical rail can be processed without complicated processing such as rasping and the like. It is possible to improve.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an entire evacuation ladder of the present invention in a use state.

FIG. 2 is a transverse cross-sectional view showing the entire evacuation ladder of the present invention in a stored state.

FIG. 3 is an enlarged partially cutaway perspective view showing a main part of the evacuation ladder of the present invention.

FIG. 4 is an exploded perspective view showing a main part of an evacuation ladder.

FIG. 5 is a cross-sectional view showing a connected state of the vertical rails in the present invention.

FIG. 6 is a side view of the vertical rail in the present invention.

FIG. 7 is an exploded perspective view showing an assembled state of the vertical rail and the horizontal rail in the present invention.

8A and 8B are a vertical cross-sectional view and a cross-sectional view taken along line bb of FIG.

[Explanation of symbols]

 10 Evacuation Ladder 11 Longitudinal Beam 12 Stretchable Body 18 Kuchiguchi Block 18a Base 18b Bent Piece 18c Notch

Front Page Continuation (72) Inventor Nobuyoshi Oba 1-1-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Naka Technical Research Institute Co., Ltd.

Claims (1)

[Claims] 1. A pair of vertically extending telescopic members formed by connecting a plurality of vertical bars in a pantograph shape, and a plurality of footrests arranged at appropriate positions between the elastic members and connected to the vertical bars. In the evacuation ladder provided with a horizontal crosspiece, the vertical crosspiece has a channel-shaped cross-sectional shape, and a base part that is bent at the end of the vertical crosspiece so as to cover the mouth opening of the vertical crosspiece, and this base part. Ladder for evacuation, which is integrally formed with a bent piece that is bent so as to abut against the mouth of the vertical beam from both side edges of the evacuation ladder.