JP3008044B2 - Evacuation ladder - Google Patents

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 an improvement of a folding evacuation ladder attached to a storage frame installed on a balcony of an apartment house or an office building.

[0002]

2. Description of the Related Art As a conventional evacuation ladder, for example, a plurality of vertical rails are connected in a pantograph shape and can expand and contract in a vertical direction, and are disposed at appropriate positions between the elastic bodies. 2. Description of the Related Art There is known a structure including a plurality of horizontal rails for footrests connected to a vertical rail.

[0003] Such an evacuation ladder needs to have a stopper for holding the extension for determining the posture of the telescopic body at the time of extension. As such a stopper, for example, Japanese Utility Model Publication No. Sho 42-2211, Japanese Utility Model Publication No. Sho 60-1245.
No. 00 and JP-B-2-14640 are known. Of these, Jikken 42-2231
No. 1 discloses an engagement piece which is bent at upper and lower ends of a vertical bar located on an outer side so as to restrict relative rotation of a vertical bar located on an inner side. Japanese Unexamined Utility Model Publication No. 60-124500 discloses a plate-shaped support bar projecting from one vertical bar connected to the X-shape to the other vertical bar, which is fixed every other stage by welding or the like. Then, when the elastic body is extended, the end of the support bar is abutted against the vertical bar to prevent the open angle of the vertical bar and the vertical bar connected in an X-shape from exceeding a certain angle. is there. In addition, Japanese Unexamined Utility Model Publication No. 2-14640 discloses a joint plate that connects a connecting portion of a vertical crossbar connected in an X-shape and an adjacent connecting portion. It becomes a straight line and regulates the extension of the elastic body.

[0004]

However, in the case where the engaging piece is engaged with another vertical rail, there is a possibility that a hand or clothing may be hooked on the engaging piece during evacuation, and safety is increased. There is a problem that lacks.

[0005] Further, in the case where the support bar is fixed to the vertical rail, it is difficult to lay out the storage space of the support bar when the ladder is stored, so that the support bar is provided on the entire vertical rail to be connected. However, there is a problem that the load when the ladder descends varies depending on the presence or absence of the support bar, and the ladder cannot be descended stably. In this case, since the support bar is fixed to the vertical rail by welding or the like, it is necessary to set the welding position and welding angle strictly to stabilize the load at the time of the ladder descent, and it requires skill in the work. There are also problems.

[0006] Further, in the case where the connecting plates are connected, there is a problem that the ladder is easily shaken at the time of evacuation because the connecting plates are unstable with respect to a horizontal load.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an evacuation ladder capable of stably descending a ladder and improving safety during evacuation. Things.

[0008]

In order to achieve the above object, an evacuation ladder according to the present invention comprises a pair of vertically expandable and contractible members formed by connecting a plurality of vertical rails in a pantograph shape. In an evacuation ladder including a plurality of horizontal rails for footrests arranged at appropriate positions between the telescopic members and connected to the vertical rails, a connecting member for the vertical rails and the horizontal rails is also used, and each link is connected. And a plurality of extension holding projections that are arranged on the connection portion and protrude outside the inner vertical rail and engage with the outer vertical rail.

In the present invention, the cross-sectional shape of the projection for holding the extension may be arbitrary, but it is preferable that the cross-sectional shape is circular.

[0010] In addition, any extension may be used as long as the extension holding projection is arranged at a connecting portion between the vertical bar and the horizontal bar and protrudes outside the inner vertical bar. Preferably has a non-circular shaft fitted into a non-circular hole formed in the vertical rail, and a screw formed coaxially with the shaft. It is better to be attached to the vertical rail by a nut connected to the vertical rail.

[0011]

According to the evacuation ladder of the present invention configured as described above, the vertical ladder and the horizontal berth are both used as connecting members , and are disposed at each connecting portion, and the inner vertical berth is provided. By providing a plurality of extension holding projections that protrude outside and engage with the outer vertical rail, the load when the ladder extends and descends can be evenly distributed over the entire length of the elastic body, and stable Ladder descent can be performed. In addition, since the protrusion is located on the outside, there is no danger of the evacuee getting caught during evacuation, and the evacuation can be performed safely. In this case, the stopper also serves as a fastening member that connects the vertical beam and the horizontal beam,
The number of parts can be reduced.

In addition, by making the cross-sectional shape of the stopper circular, processing accuracy is improved as compared with a non-circular one, so that deformation due to one-side contact is suppressed, and the load over the entire length of the elastic body is evenly distributed. Can be. As a result, the ladder can be extended and lowered stably. Further, even if the user puts his hand at the time of evacuation, the user is not damaged and the clothes are not caught, so that it is safe.

A non-circular shaft fitted into a non-circular hole formed in the vertical rail, and a screw formed coaxially with the shaft are provided. The protrusions can be securely fixed to the vertical rails by being configured to be attached to the vertical rails by nuts coupled to the vertical rails.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 entire evacuation ladder of the present invention in a use state, FIG. 2 is a side view of FIG. 1, and FIG. ing.

The evacuation ladder 10 of the present invention comprises a pair of left and right telescopic members 12, 12 which are formed by connecting a plurality of vertical rails 11, 11,. 12 and 11 and 11
Are connected to a plurality of horizontal rails 13, 13,... The vertical rail 11 at the top of the ladder 10
It is pivotally attached to a mounting member 4 fixed to an inner surface of a storage frame 3 fitted and fixed to a slab opening 2 formed in a slab 1 such as a floor or a veranda via a sealing member (not shown). .

An upper lid 5 on the floor side of the slab opening 2 and a lower lid 6 on the ceiling surface on the floor immediately below the slab 1 are pivotally connected to the storage frame 3 so as to be openable and closable. The upper lid 5 and the lower lid 6 are interconnected via a link device 7, and when the upper lid 5 is opened upward, the upper lid 5 is closed.
Is configured to fix and hold the upright posture, and to automatically open the lower lid 6 in conjunction with the lower lid 6. Also,
At the tip of the ladder 10, a slowing down device 8 is provided. The lifting / lowering device 8 includes a ratchet mechanism including a winding drum (not shown). A wire rope 8b wound around the winding drum is laid between the vertical bars 11, 11 at the lower end of the ladder 10. Is connected to the horizontal rod 15 via a hook 9. When the upper and lower lids 5 and 6 are opened by the lowering device 8, the ladder 10 extends and descends while being controlled,
The ladder 10 is pulled up by the winding of the wire rope 8b and is stored in the storage frame 3.

The vertical bars 11, 11,...
Are formed by bending a metal plate such as stainless steel or steel so as to have a channel-like cross-sectional shape. The telescopic body 12 is formed by superposing the inner vertical rail 11 and the outer vertical rail 11 back to back in an X-shape, connecting the center portions of the vertical rails 11 and 11 with rivets 16, and connecting them in an X-shape. A plurality of vertical rails 11 and 11 are vertically arranged, and the ends of the vertical rails 11 and 11 are overlapped with each other to form a rivet 1.
6 are formed by connecting them. The fore-end portion of the vertical rail 11 is provided with a base 18a bent from the end of the vertical rail base 11a and a bent piece 18b bent from the end of the vertical rail-side piece. 18 are formed.

The horizontal rails 13, 13,...
As shown in the figure, the lower ends of the vertical bars 11, 11 located on the inner side are connected by stopper bolts 20 (connecting members) via substantially L-shaped joint fittings 19.

In the ladder 10 constructed as described above, it is necessary that the distance between the elastic bodies 12 is maintained at a constant position when the ladder 10 is extended and lowered. Therefore, in the present invention, the extension of the ladder 10 is held by forming a projection for holding the extension at the connecting portion between the vertical bar 11 and the horizontal bar 13. That is, the stopper bolt 2
0 is provided with a function of holding the posture of the ladder 10 at the time of extension.

In this case, the stopper bolt 20 includes a large-diameter disc-shaped stopper (stopper) 20a for forming a projection for extension and holding, a non-circular shaft portion 20b having a substantially elliptical cross section, and a screw portion. 20c are formed coaxially (see FIG. 4). Stopper bolt 2 configured in this way
No. 0 shaft portion 20b is fitted into a non-circular elliptical hole portion 11c formed at the lower end portion of the vertical bar 11, and a nut 22 is inserted into the screw portion 20c inserted through the hole portion 19e of the joint fitting 19. By fastening, the horizontal beam 13 and the vertical beam 11 are fixed. In this state, the stopper portion 20a is fixed to the outside of the vertical rail 11 located inside. Therefore, FIGS. 1 and 2
As shown in FIG. 5, the stopper portion 20a contacts the side surface of the vertical bar 11 located outside when the ladder 10 is extended, restricts the extension movement of the ladder 10, and the posture of the telescopic members 12, 12 at the time of extension. Can be held.

In this case, the stopper bolt 20 is
The number of parts can be reduced because the bolt for assembling 1 and the horizontal rail 13 is also used as a stopper for determining the posture of the elastic body 12. Further, since the stopper bolts 20 are attached to the connecting portions between the vertical rails 11 and the horizontal rails 13, the loads can be shared on average. In addition, since the cross-sectional shape of the vertical rail 11 and the horizontal rail 13 is formed in a channel shape, the entire ladder is relatively light, so the stopper portion 20a
Impact can be reduced. Further, since the stopper portion 20a has a disk shape, the processing accuracy is high and the deformation due to the one-side contact is suppressed, and it is possible to prevent the hand from being hurt or catching the clothes at the time of evacuation. Also, a shaft 20b and a hole 1 into which the shaft 20b is fitted.
Since 1c has an elliptical shape, rotation of the stopper bolt 20 can be prevented, and the stopper portion 20a can be securely fixed.

A plurality of non-slip irregularities 23, 23,... Are integrally formed in a staggered manner by embossing on the footrest horizontal piece 13a of the horizontal rail 13. As a result, it is possible to prevent the feet from slipping at the time of evacuation, thereby improving safety.

The joint fitting 19 includes a flat horizontal piece 19a, a pair of vertical pieces 19b, 19b extending downward from both edges of one end of the horizontal piece 19a, and one vertical piece 19b. A washer 19c extending from the inner edge to the inner edge of the other vertical piece 19b is formed by bending a metal plate. The horizontal piece 19a
It has a hole 19d formed in alignment with a hole 13c formed in the horizontal piece 13a, while being in contact with the back surface of the horizontal piece 13a for footrest of the horizontal rail 13.
The rivets 21 and 21 are inserted into and fastened to the inside of the cross rail 19d. The vertical piece 19b is in contact with the back surface of the vertical pieces 13b, 13b of the horizontal rail 13, and a hole 19e for attaching a stopper bolt is formed in the center of the washer 19c.

At the end of the horizontal piece 13a of the horizontal rail 13, a horizontal projection 24 is formed which engages with a slit 25 provided at a predetermined position of the vertical rail 11, thereby positioning and fastening the stopper bolt 20. Becomes easier and the vertical
The mounting rigidity of the horizontal rail 13 with respect to is increased.

The vertical rail 11 and the horizontal rail 13 configured as described above
First, the horizontal protrusion 24 of the joint 19 is engaged with the slit 25 of the vertical bar 11 and temporarily fixed, and then the joint 19 is inserted into the horizontal bar 13 and fixed by the rivets 21 and 21. . Then, the stopper bolt 20 is inserted into the hole 11c of the vertical bar 11 from the screw portion 20c side, and the shaft portion 20b is inserted into the hole 11c, and the screw portion 20c is formed in the washer 19c of the joint fitting 19. Nut 19a through a flat washer 22a and a spring washer 22b for securing the screw portion 20c.
By fastening 2, the vertical rail 11 and the horizontal rail 13 can be connected.

In the above embodiment, the vertical rail 11 and the horizontal rail 1
3 has been described as a channel,
And the crosspiece 13 need not necessarily be channel-shaped,
For example, it may be flat or pipe-shaped.

[0028]

As described above, according to the evacuation ladder of the present invention, since it is configured as described above, the following effects can be obtained.

1) According to the evacuation ladder of claim 1,
Since it also serves as a connecting member for the vertical rail and the horizontal rail, and is provided at each connecting part, and includes a plurality of extension holding projections that protrude outward from the inner vertical rail and engage with the outer vertical rail, The load when the ladder descends can be evenly distributed over the entire length of the elastic body, and the ladder can stably descend. In addition, since the projection for extension and retention protrudes outward, there is no danger that the evacuee will be caught by the projection during evacuation, which is safe.

2) According to the evacuation ladder of claim 2,
Since the cross-sectional shape of the projection for extension and retention is circular, the shape is stable and the ladder can descend stably. Nor.

3) According to the evacuation ladder of claim 3,
A non-circular shaft portion into which a projection for extension and retention is fitted into a non-circular hole formed in the vertical rail, and a screw portion formed coaxially with the shaft portion; Since the projection is attached to the vertical rail by the nut connected to the portion, the projection can be securely attached.

[Brief description of the drawings]

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

FIG. 2 is a side view of FIG.

FIG. 3 is a cross-sectional view showing the entire escape ladder of the present invention in a housed state.

FIG. 4 is an exploded perspective view showing an assembled state of the vertical beam and the horizontal beam in the present invention.

5A and 5B are a longitudinal sectional view and a sectional view taken along line bb, respectively, showing a connecting state between the vertical and horizontal rails.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Evacuation ladder 11 Vertical beam 12 Telescopic body 13 Horizontal beam 20 Stopper bolt (connecting member) 20a Stopper portion (extension holding projection) 20b Shaft portion 20c Screw portion 22 Nut

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 49-12798 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E06C 9/14 A62B 5/00

Claims (3)

(57) [Claims] 1. A pair of vertically expandable and contractible bodies formed by connecting a plurality of vertical rails in a pantograph shape, and a plurality of footrests disposed at appropriate positions between the elastic bodies and connected to the vertical rails. In the evacuation ladder provided with the horizontal rails, the vertical rails and the horizontal rails are also used as connecting members , and are disposed at each connecting portion, and protrude outward from the inner vertical rails and engage with the outer vertical rails. An evacuation ladder comprising a plurality of projections for extension and holding. 2. The evacuation ladder according to claim 1, wherein a cross-sectional shape of the extension holding projection is circular. 3. A projection for extension and holding includes a non-circular shaft fitted into a non-circular hole formed in the vertical rail, and a screw formed coaxially with the shaft. 2. The evacuation ladder according to claim 1, further comprising: a nut connected to the threaded portion and attached to the vertical rail.