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Folding stairway ladders, preferably made of metal

A ladder-like and ladder-like technology, which is applied in the field of metal foldable ladder-like ladders and metal foldable ladder-like steps, can solve the problems of no auxiliary parts for folding the middle section, inconvenience, etc., and achieve the goal of improving the beautiful appearance Effect

Inactive Publication Date: 2012-10-24
弗克莱屋顶天窗有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these ladders are provided with springs that support the lifting of the folding ladder together with the cover as a whole, the ladders are not provided with aids for folding the middle and bottom sections to place them on the uppermost section
The absence of this aid is especially inconvenient in the case of metal steps which are much heavier than wooden steps

Method used

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  • Folding stairway ladders, preferably made of metal
  • Folding stairway ladders, preferably made of metal
  • Folding stairway ladders, preferably made of metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0021] The three-segment collapsible ladder-like steps shown in Figures 1 and 2 comprise a frame 1 embedded in the ceiling of a building. The frame 1 can be closed from the bottom by a cover 11 connected to the frame by a hinge mechanism and a tie rod configuration limiting the opening limit of the cover 11 . The construction connecting the frame 1 to the cover 11 also includes a spring that lifts the cover 11 together with the folded step sections upwards during closing of the cover and balances the cover 2 with the steps during opening of the cover. weight. The uppermost section 2 of the ladder is fixed to the cover 11 and the middle section 3 of the ladder is connected to the uppermost section 2 by hinges located on the top surfaces of the stringers (side beams) of these sections. The bottom segments 4 are connected to the middle segment 3 by hinges located on the bottom surface of the stringers of these segments. In the open state where the ladder is deployed for use, th...

Embodiment approach 2

[0028] The four-section collapsible ladder-like step shown in Figure 4 comprises a frame 1 embedded in the ceiling of a building. The frame 1 can be closed from the bottom by a cover 11 connected to the frame by a hinge mechanism and a similar tie rod configuration as in embodiment 1. The uppermost section 2a of the ladder is fastened to the cover 11 . The middle section 7 is slidably connected to the section 2a, while said middle section 7 and subsequent sections, ie a middle section 8 and a bottom section 4a, are connected to each other by hinges.

[0029] The middle section 8 is connected to the slidable section 7 by hinges at the top surface of the stringers of these sections 7 , 8 and the bottom section 4 a is connected to the middle section 7 by hinges at the bottom surface of the stringers of these sections 4 a , 7 . In the open ladder being deployed for use, the ends of the stringers of adjacent intermediate sections 7, 8 and 4a are joined to each other maintaining th...

Embodiment approach 3

[0033] Similar to Embodiment 1, the collapsible ladder-like step comprises a frame embedded in the ceiling of the building which can be closed by a cover connected to the frame by a hinge mechanism and a spring-loaded tension rod configuration. The set of ladder-like segments, the hinged connection system between the segments and the method of unfolding and collapsing the segments are the same as in Embodiment 1.

[0034] In this embodiment, the telescoping armrest has a slightly different structure and comprises two C-shaped profiles, wherein the inner profile is slidably placed within the outer profile in such a way that it is possible to move the inner profile from the outer profile Retractable and prominent. The flange (end part of the arm) of the outer profile is bent to be able to safely guide the inner profile.

[0035] Each profile is arranged to mate with the other profile at its ends by flanging of plastics material, which facilitates mutual sliding of the profiles ...

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PUM

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Abstract

The invention relates to a foldable stairs, and in particular to a metal foldable ladder- like stairs, comprising stairs segments (2, 3, 4) moveable with relation to each other, wherein the uppermost segment (2) is rotationally connected with a frame (1 ) mounted in a ceiling and preferably the uppermost stairs segment (2) is attached to the cover (11 ) that adheres to said frame (1 ) in the stairs closed state and is connected with the frame (1 ) by means of a hinge mechanism and the stairs segments (2, 3, 4) are positioned within the frame (1 ) in the stairs closed state, where the stairs are preferably provided with a mechanism, preferably a spring mechanism, that supports lifting folded stairs up to the stairs closed state and at least partially counterbalances the weight of the stairs during opening thereof,; and further the stairs are provided with at least one handrail arranged in the top part of the stairs flight. In order to facilitate folding and unfolding the stairs and to provide the stairs featuring adjustable length, the stairs comprise a spring (6) that supports lifting up of the stairs segments (3, 4, 7) other than the uppermost segment (2) during folding these segments (3, 4, 7) with the uppermost segment (2) and at least partially counterbalances the weight of these segments (3, 4, 7) during unfolding the stairs, wherein the spring (6) is arranged inside the handrail (5). The bottom segment (4) of the stairs is advantageously provided with means (41, 42) for regulating the length of the bottom segment (4).

Description

[0001] The present invention relates to collapsible ladders, and more particularly, to metal collapsible ladder-like steps embedded in a frame mounted in the ceiling and placed in the frame in a closed state to transform the steps into The open state for use consists in deploying the ladder downwards. This type of ladder is mainly used for attic entrances. The ladder can also be used as a collapsible ladder that functions like a ladder, but is usually steeper than a typical ladder. Background technique [0002] The prior art discloses collapsible ladder-like steps embedded in a frame mounted in the ceiling. This known ladder comprises three segments interconnected by means of hinges. The uppermost section is arranged on a cover which closes the frame of the ladder in the closed state. Folding the ladder consists in placing the middle and bottom sections on top of the uppermost section and lifting such a folded construction upwards. Although these ladders are provided with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04F11/06
CPCE04F11/064
Inventor B·克拉辛斯基B·卡兹马尔斯基
Owner 弗克莱屋顶天窗有限公司