JP2006299800A - Folding type escape ladder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding type escape ladder of which the pair of right and left stringers folded and stored in the interior of a cross rail when not in use maintain the stability of the cross rail, and the stringers are surely folded inwardly when they are stored. <P>SOLUTION: The freely foldable stringers 2, which connect both ends of the two cross rails 1 adjacent to each other up and down, are guided to the interior of the cross rail through a slit 1a projected in the vicinity of the end of the cross rail. Then the stringers are connected by the cross rail and connection pin 4, thus the stringers are folded and stored in the interior of the cross rail when not in use. When a escape ladder is used, the tip of a spring arranged to the connection pin between the stringer and the cross rail is brought into contact with the tip of the extended end, and the lower member 2b of the stringer receives a force which pushes back the lower member 2b a little bit inwardly. When the escape ladder is put away after its use, the stringer is surely and easily folded inside. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a folding evacuation ladder for a general house or a low-rise apartment that is stored in a folded state when not in use, suspended on a window frame or a handrail of a veranda in an emergency evacuation such as a fire, and extended and suspended.

A large number of horizontal rails arranged in the vertical direction, a foldable vertical member that connects the ends of the horizontal rails adjacent to each other in the vertical direction, and a hanging bracket attached to both ends of the uppermost horizontal rail, When not in use, the vertical members are folded so that the horizontal beams are in contact with each other on their lower and upper sides. When in use, the hanging brackets are suspended from the window frame or on the handrails of the veranda. Regarding the folding evacuation ladder to be in a state, several improved inventions and devices have been made.
For example, in Japanese Patent Application Laid-Open No. 7-23860, a convex portion along the longitudinal direction of the horizontal rail is formed on one surface of the opposite surfaces of the horizontal rail adjacent vertically, and the convex portion is fitted to the convex surface on the other surface. In the Japanese Patent Laid-Open No. 8-86175, a pair of folding ladders arranged at the front and back are arranged laterally by forming a concave portion and fitting the convex portion and the concave portion so as to make it compact. By connecting at the crosspiece, the rigidity in the front-rear direction is increased, and there is no significant fluctuation in the position of the evacuees even in places where the wall of the building has a recess or the wall is missing from the middle Each has been announced to be safe and quick to evacuate.
Japanese Patent Laid-Open No. 7-23860 JP-A-8-86175

In the conventional folding-type evacuation ladder, a hollow rectangular tube made of aluminum alloy or the like is used as the horizontal beam, and the vertical member has to be attached to the outside of the side surface of the horizontal beam. Considering the strength of the member that joins the cross beam and the vertical member, two sets of vertical members are arranged on both sides of the cross beam, or arranged in the front and rear as disclosed in JP-A-8-86175. It was necessary to join the pair of folding ladders at the crosspieces.
In addition, since the two members constituting the longitudinal member are both long plate-like bodies, there is no guarantee that both members will be folded inward when the stretched and suspended evacuation ladder is refolded and stored. In some cases, the connecting portion of the members may be folded outward, and in that case, it is necessary to manually store the vertical member folded outward by folding it back inward.
The present invention provides a folding evacuation ladder in which the horizontal beam is kept stable by a set of vertical members that are folded and stored inside the horizontal beam when not in use, and the vertical member is always folded inward when stored. Is an issue.

The present inventor has solved the above problems by the following means.
(1) A large number of horizontal rails arranged in the vertical direction, a foldable vertical member that connects both ends of the horizontal rails adjacent to each other in the vertical direction, and a suspension attached to both ends of the top horizontal rail When not in use, the vertical members are folded so that the horizontal rails are in contact with each other at the lower and upper sides, and when in use, the hanging brackets are suspended on the window frame or on the handrails of the veranda. In the evacuation ladder,
The crosspiece is a member having a groove-shaped cross section, and has a slit through which the lower part of the vertical member is inserted in the upper surface in the vicinity of both ends thereof, and the foldable vertical member has a connecting pin at the connecting portion. The upper member is guided from the lower surface of the horizontal beam and the lower member is guided from the slit provided on the upper surface of the horizontal beam to the inside of the horizontal beam. It is rotatably connected by a crosspiece and a connecting pin,
The upper and lower members of the vertical member are long plate-like bodies whose upper members are arc-shaped at both ends, and the lower members are long-plate members whose both ends are arc-shaped. When the vertical member is folded by having a gently bent shape near the part and having a gentle bend in the vicinity of the joint of the lower member to the horizontal beam, the lower member is placed on the upper surface of the horizontal beam. Folding-type evacuation characterized in that it is stored in the upper horizontal rail without contact and is configured to be securely folded and stored in the horizontal rail after use. Ladder.

  (2) A spring spring is provided around a coupling pin that rotatably couples the horizontal beam and the vertical member at both ends of the horizontal beam, and one end of the spring spring is straight inward along the long side of the horizontal beam. And the front end of which is in contact with the inner wall of the upper surface of the horizontal rail, and the other end is extended toward the outside of the horizontal rail and projects upward from the end of the horizontal rail. It is bent and is bent so as to contact the outer surface of the lower member of the vertical member when the vertical member is extended and suspended, and to prevent the vertical member of the lower member from protruding outward from the horizontal rail. The foldable evacuation ladder according to (1) above, characterized in that

The following effects can be exhibited by the present invention.
(A) When the evacuation ladder is not used, the lower member of the foldable vertical member has a gentle bend, so the lower member is stored inside the horizontal beam without contacting the upper surface of the horizontal beam, and there is no storage space. Less.
(A) In addition to the effect of (A) above, the connecting part of the vertical member and the horizontal beam and the connecting part of the two members of the vertical member are housed in the horizontal beam, so that not only a simple appearance is exhibited, When not in use, dust can be prevented from sticking to each joint and rainwater can be prevented from entering, and reliable extension and drooping when using an evacuation ladder can be expected.
(C) Since the vertical members are joined to the horizontal beam inside the horizontal beam through the slits opened near both ends of the horizontal beam, the horizontal beam can be kept stable with one set of vertical members. Safety is ensured and the number of parts can be reduced, thereby reducing costs.
(D) When the end of the spring spring provided around the connecting pin that rotatably couples the horizontal beam and the vertical member at both ends of the horizontal beam is extended and suspended, Since it is configured to contact the outer surface of the lower member and push the lower member of the longitudinal member back inward, the lower member is prevented from protruding outside, and the used evacuation ladder is cleared. When lowering, the lower member is pushed back inward to be securely stored in the cross rail.

Embodiments of the present invention will be described with reference to the drawings of the examples.
FIG. 1 is a perspective view showing an outline of a folding evacuation ladder according to the present invention, FIG. 2 is an explanatory view showing a state in which a vertical member is stored inside a horizontal beam when the evacuation ladder is not used, and FIG. 3 is a combination of the vertical member and the horizontal beam. Side view (a) and bottom view (b), FIG. 4 is a perspective view showing the arrangement of the upper and lower members and spring springs on the vertical member / crosspiece connecting pin, and FIG. 5 is when the evacuation ladder is not used (a It is explanatory drawing of the combined state of the vertical member and horizontal crosspiece at the time of use (b).
In the figure, 1 is a horizontal beam, 1a is a slit, 2 is a vertical member, 2a is an upper member, 2b is a lower member, 3 is a hanging metal fitting, 4 is a member coupling pin, 5 is a vertical member / horizontal beam coupling pin, 5a 5b is a part in which the shaft diameter of the vertical member / crosspiece connecting pin is different, 6 is a spring spring, 6a is a tip of the end of the spring spring which is bent twice and 6b is a straight line of the spring spring. The tip of the finished end is shown.

  As shown in FIG. 1, the foldable evacuation ladder according to the present invention is a foldable vertical ladder that connects a large number of horizontal beams 1 arranged in the vertical direction and both ends of the horizontal beam 1 adjacent in the vertical direction. Material 2 and hanging brackets 3 attached to both ends of the uppermost horizontal beam 1. When not in use, the vertical material 2 is folded so that the horizontal beams 1 come into contact with each other at their lower and upper side surfaces. It is an evacuation ladder that is in a contact state and is suspended by hanging the hanging metal fitting 3 on a window frame or a handrail of a veranda in use. The horizontal beam 1 is a member having a groove-shaped cross section, and is A slit 1a for inserting the lower part of the vertical member 2 is provided on the upper surface in the vicinity of both ends of the crosspiece, and the vertical member 2 is composed of two upper and lower members 2a and 2b. The two members 2a and 2b are joined at the ends. The pins 4 are connected to each other so as to be rotatable. Further, the upper member 2a of the longitudinal member 2 is a long plate-like body whose both ends are arc-shaped, and the lower member 2b is a long plate-like body whose both ends are arc-shaped in the vicinity of the connecting portion to the horizontal beam. Thus, when the vertical member 2 is folded, the vertical member 2 is accommodated in the horizontal rail 1 as shown in FIG.

As shown in FIGS. 3 and 4, the horizontal crosspiece and the vertical member are connected to each other through the connecting pin insertion holes formed in the side surfaces of both ends of the horizontal crosspiece 1 and the ends of the members 2 a and 2 b of the vertical member 2. This is done by inserting the vertical member / crosspiece connecting pin 5 through the provided connecting pin insertion hole. At this time, the members 2a and 2b are rotatably coupled to the central portion 5b of the longitudinal member / horizontal beam coupling pin 5 whose shaft diameter is changed in three stages as shown in FIG. Note that the portion 5a having a large shaft diameter of the vertical member / horizontal beam coupling pin 5 also serves as a spacer for keeping the distance between the side wall of the horizontal beam 1 and the upper member 2a constant.
In addition, one end portion as shown in FIG. 4 is stretched in a straight line at the center portion 5b of the vertical member / crosspiece connecting pin 5 and the other end is straightly stretched in the opposite direction and then bent at a right angle. Further, a spring spring 6 bent in the direction of the thick shaft 5a of the vertical member / horizontal beam coupling pin 5 is provided between the side wall of the horizontal beam 1 and the lower member 2b of the vertical member 2. As shown in FIG. 3 (b), the end 6b of the end of the spring spring 6 that is extended in a straight line contacts the inner wall of the upper surface of the horizontal rail 1 and is bent twice and extended. The tip 6a is in contact with the outer surface of the lower member 2b of the longitudinal member 2 and prevents the lower member 2b from protruding outward when the evacuation ladder is extended and suspended. The spring spring 6 also serves as a spacer that keeps the distance between the side wall of the cross rail 1 and the lower member 2b constant.

FIG. 5 shows a comparison of the state of the connecting portion between the vertical member 2 and the horizontal beam 1 when the evacuation ladder is not used and when it is used. When not in use, as shown in FIG. 5 (a), the upper member 2a of the vertical member 2 is horizontally stored in the attached horizontal beam 1 and the lower member 2b is an upper abutted horizontal beam. It is housed inside through the slit 1a of the horizontal rail 1, and nothing is in contact with the tip 6a of the end of the spring spring 6 that is bent and extended twice.
When the evacuation ladder extends and hangs down, the upper member 2a of the longitudinal member 2 hangs down and the lower member 2b rises upward as shown in FIG. 5B. At this time, the outer surface of the lower member 2b comes into contact with the tip 6a of the end of the spring spring 6 that is bent twice and extended. At this time, it is preferable that the spring spring 6 is formed in such a manner that the tip 6a of the spring spring 6 pushes the outer surface of the lower member 2b somewhat inward.

  When clearing the evacuation ladder after using it for evacuation training, etc., if the upper and lower horizontal rails are brought into contact with each other, the conventional folding ladder has a slight difference in the positional relationship between the upper member 2a and the lower member 2b at that time. Thus, the joint between the upper member 2a and the lower member 2b is folded outward or inward. However, in the folding escape ladder of the present invention, the tip 6a of the spring spring 6 pushes the outer surface of the lower member 2b back inward, so that the upper member 2a and the lower member 2b are not folded outward. Absent. If the upper member 2a and the lower member 2b are to be bent outward, the outer surface of the lower member 2b presses the tip 6a of the spring spring 6 outward, and the elasticity of the spring spring 6 is increased. Acts to increase the force to push the lower member 2b back inward, and as a result, the vertical member 2 is folded inward and securely stored in the horizontal rail 1.

The hanging bracket 3 does not need to be a carabiner-shaped bracket as shown in FIG. 1, and has a shape and structure that is optimal for the hanging place from among various hanging brackets that are already commercially available. It is only necessary to select and use the hanging brackets, and the hanging bracket 3 can be attached to the uppermost crosspiece 1 with any type of rope, chain, or any other material, and safety during evacuation. Can be ensured and has excellent durability. Further, in order to avoid that the horizontal beam 1 is in close contact with the wall surface of the building and it becomes difficult to put a foot on the horizontal beam 1 during evacuation, the side wall of the building 1 and the horizontal beam 1 are placed on one side of the horizontal beam 1. It is also preferable to provide a protruding metal fitting that gives a gap to the surface.
Furthermore, when using an evacuation ladder, it is also preferable to provide a slow-down mechanism for preventing a danger of harming a person who is directly below due to the sudden extension and drooping. ,
The evacuation ladder storage box and storage bag may be used for dust prevention and waterproofing when not in use, but the evacuation ladder stored at the time of evacuation must be able to be quickly and easily removed.
Although the present invention is most suitable for an evacuation ladder, the storage space may be small, the whole is compact, easy to fold, and further lightweight, so not only the evacuation ladder, It can be used as a folding ladder in various applications (for example, leisure and business use).

The perspective view which shows the outline | summary of the folding-type evacuation ladder of this invention Explanatory drawing of the state in which the vertical members are stored inside the horizontal rail when the evacuation ladder is not used Side view (a) and bottom view (b) of the joint between the vertical member and the cross rail The perspective view which shows the arrangement | positioning state of the up-and-down member and a spring spring to a vertical member and a crosspiece connecting pin Explanatory drawing of the combined state of the vertical members and the horizontal beam when the evacuation ladder is not used (a) and when used (b)

Explanation of symbols

1: Horizontal beam 1a: Slit 2: Vertical member 2a: Upper member 2b: Lower member 3: Hanging bracket 4: Member coupling pin 5: Vertical member / horizontal beam coupling pin 5a, 5b: Vertical member / horizontal beam coupling pin 6: Spring spring 6a: Tip of the end of the spring spring that is bent twice and extended 6b: Tip of the end of the spring spring that is extended by a straight line

Claims (2)

A large number of horizontal rails arranged in the vertical direction, a foldable vertical member that connects the ends of the horizontal rails adjacent to each other in the vertical direction, and a hanging bracket attached to both ends of the uppermost horizontal rail, When not in use, the vertical members are folded so that the horizontal beams are in contact with each other on their lower and upper sides. When in use, the hanging brackets are suspended from the window frame or on the handrails of the veranda. In the evacuation ladder,
The crosspiece is a member having a groove-shaped cross section, and has a slit through which the lower part of the vertical member is inserted in the upper surface in the vicinity of both ends thereof, and the foldable vertical member has a connecting pin at the connecting portion. The upper member is guided from the lower surface of the horizontal beam and the lower member is guided from the slit provided on the upper surface of the horizontal beam to the inside of the horizontal beam. It is rotatably connected by a crosspiece and a connecting pin,
The upper and lower members of the vertical member are long plate-like bodies whose upper members are arc-shaped at both ends, and the lower members are long-plate members whose both ends are arc-shaped. When the vertical member is folded by having a gently bent shape near the part and having a gentle bend in the vicinity of the joint of the lower member to the horizontal beam, the lower member is placed on the upper surface of the horizontal beam. It is stored inside the upper side rail without contact,
A foldable evacuation ladder, wherein the vertical member is configured to be securely folded and housed inside the horizontal rail after use. A spring spring is provided around a coupling pin that rotatably couples the horizontal beam and the vertical member at both ends of the horizontal beam, and one end of the spring spring extends linearly inward along the long side of the horizontal beam. And the front end portion thereof abuts against the inner wall of the upper surface of the horizontal rail, the other end is extended toward the outside of the horizontal rail, and is bent upward at a portion protruding outward from the end portion of the horizontal rail, Further, when the vertical member is extended and suspended, it is bent so as to contact the outer surface of the lower member of the vertical member and prevent the lower member of the vertical member from protruding outward from the horizontal rail. The foldable evacuation ladder according to claim 1.